Abstract

The present disclosure relates to the recycling of acrylonitrile butadiene styrene (ABS) waste. The present disclosure relates to methods for recycling ABS waste. For example, the present disclosure relates to methods of recycling ABS waste by recovering styrene acrylonitrile polymer (SAN), optionally by molecular weight (MW). The present disclosure relates to a recycled SAN obtained from ABS waste and articles comprising the recycled SAN.

IPC Classes  ?

• C08F 236/12 - Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated with nitriles
• C08J 11/08 - Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components
• C08L 25/12 - Copolymers of styrene with unsaturated nitriles
• C08L 47/00 - Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bondsCompositions of derivatives of such polymers

Abstract

The present disclosure relates to methods of recovering flame retardant from a styrenic polymer waste.

IPC Classes  ?

• C08J 11/08 - Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components

Abstract

The present disclosure relates to methods of removing brominated contaminants from polystyrene waste and recovering the brominated contaminants. The present disclosure further relates to methods of recycling polystyrene waste, wherein the recycling comprises retention of brominated contaminants or removal of contaminants. The present disclosure also relates to use of monocyclic aromatic benzenic solvents in the removal and/or recovery of brominated contaminants from polystyrene waste and in the recycling of polystyrene waste. Moreover, the present disclosure relates to use of the recovered brominated contaminants in the manufacture of polystyrene products such as insulation.

IPC Classes  ?

• C08J 11/08 - Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components

Abstract

There are provided recycled polystyrene polymers having a melt flow index of less than about 25 g/10 min. There are provided processes for recycling polystyrene waste. The processes can comprise dissolving said polystyrene waste in p-cymene under conditions to obtain a polystyrene/p-cymene mixture, adding the polystyrene/p-cymene mixture to a hydrocarbon polystyrene non-solvent under conditions to obtain precipitated polystyrene and washing the precipitated polystyrene with additional portions of hydrocarbon polystyrene non-solvent under conditions to obtain twice-washed polystyrene. The twice-washed polystyrene can optionally be dried and formed into polystyrene pellets. There is also provided recycled polystyrene obtained from such processes for recycling polystyrene waste.

IPC Classes  ?

• C08J 11/08 - Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components
• B29B 17/02 - Separating plastics from other materials
• C08F 112/08 - Styrene
• C08J 11/00 - Recovery or working-up of waste materials
• C08L 25/00 - Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ringCompositions of derivatives of such polymers
• C08L 25/06 - Polystyrene

Abstract

The present disclosure relates to methods of removing brominated contaminants from polystyrene waste and recovering the brominated contaminants. The present disclosure further relates to methods of recycling polystyrene waste, wherein the recycling comprises retention of brominated contaminants or removal of contaminants. The present disclosure also relates to use of monocyclic aromatic benzenic solvents in the removal and/or recovery of brominated contaminants from polystyrene waste and in the recycling of polystyrene waste. Moreover, the present disclosure relates to use of the recovered brominated contaminants in the manufacture of polystyrene products such as insulation.

IPC Classes  ?

• C08J 11/08 - Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components

Abstract

There are provided processes for recycling polystyrene waste. Recycled polystyrenes are also disclosed. For example, the recycled polystyrene can comprise a non-solvent having a boiling point at 1 atm of pressure of from 98° C. to 110° C.; and ethylbenzene.

IPC Classes  ?

• C08J 11/08 - Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components
• B29B 17/02 - Separating plastics from other materials

Goods & Services

(1) Decontamination and purification machines for the treatment of thermoplastic resins (2) Recycled thermoplastic resins for use in manufacture (1) Recycling of plastic waste into thermoplastic resins (2) Licensing the recycling technology of decontamination and purification for the treatment of plastic waste into thermoplastic resins

IPC Classes  ?

• C08F 236/12 - Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated with nitriles
• C08J 11/08 - Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components
• C08L 25/12 - Copolymers of styrene with unsaturated nitriles
• C08L 47/00 - Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bondsCompositions of derivatives of such polymers

Abstract

The present disclosure relates to the recycling of acrylonitrile butadiene styrene (ABS) waste. The present disclosure relates to methods for recycling ABS waste. For example, the present disclosure relates to methods of recycling ABS waste by recovering styrene acrylonitrile polymer (SAN), optionally by molecular weight (MW). The present disclosure relates to a recycled SAN obtained from ABS waste and articles comprising the recycled SAN.

IPC Classes  ?

• C08J 11/08 - Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components
• C08F 236/12 - Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated with nitriles

Abstract

The present disclosure relates to methods of removing brominated contaminants from polystyrene waste and recovering the brominated contaminants. The present disclosure further relates to methods of recycling polystyrene waste, wherein the recycling comprises retention of brominated contaminants or removal of contaminants. The present disclosure also relates to use of monocyclic aromatic benzenic solvents in the removal and/or recovery of brominated contaminants from polystyrene waste and in the recycling of polystyrene waste. Moreover, the present disclosure relates to use of the recovered brominated contaminants in the manufacture of polystyrene products such as insulation.

IPC Classes  ?

• C08J 11/08 - Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components

IPC Classes  ?

• B29B 17/02 - Separating plastics from other materials
• C08J 11/06 - Recovery or working-up of waste materials of polymers without chemical reactions

Abstract

The present disclosure relates to methods of separating flame retardant from styrenic polymer in a styrenic polymer waste. The method comprises combining the styrenic polymer waste with a solvent to obtain a soluble portion and an insoluble portion, separating the soluble and insoluble portion, and either the flame retardant is substantially in the soluble portion and the styrenic polymer is substantially in the insoluble portion or vice versa.

IPC Classes  ?

• C08J 11/00 - Recovery or working-up of waste materials
• C08J 11/06 - Recovery or working-up of waste materials of polymers without chemical reactions
• C08J 11/08 - Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components

Abstract

There are provided processes for recycling waste such as polystyrene thermoplastic polymer waste and/or polystyrene thermoplastic copolymer waste as well as recycled polystyrene thermoplastic polymer and/or recycled thermoplastic copolymer that may, for example, be obtained from such processes. The recycled polystyrene and/or recycled polystyrene copolymer obtained therefrom has a transmittance ranging from 80 to 99%; the transmittance being measured in a UV-VIS spectrum at 600 nm at 20° C. on solution comprising the recycled polystyrene and/or recycled polystyrene copolymer diluted in cymene, and wherein the reference solution for 100% of transmittance in a UV-VIS spectrum at 600 nm at 20° C. is a solution of virgin polystyrene homopolymer diluted in cymene, wherein the content of virgin polystyrene is 20 wt. % of the total weight of the reference solution, wherein the content of recycled polystyrene and/or recycled polystyrene copolymer is 20 wt. % of the total weight of the solution.

IPC Classes  ?

• C08J 11/08 - Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components
• B29B 17/02 - Separating plastics from other materials

Abstract

There are provided processes for recycling polystyrene waste. The processes can comprise dissolving said polystyrene waste in ethylbenzene under conditions to obtain a polystyrene/ethylbenzene mixture, adding the polystyrene/ethyl benzene mixture to a hydrocarbon polystyrene non-solvent under conditions to obtain precipitated polystyrene and washing the precipitated polystyrene with additional portions of hydrocarbon polystyrene non-solvent under conditions to obtain twice-washed polystyrene. The twice-washed polystyrene can optionally be dried and formed into polystyrene pellets. There is also provided recycled polystyrene obtained from such processes for recycling polystyrene waste.

IPC Classes  ?

• C08J 11/08 - Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components
• B29B 17/02 - Separating plastics from other materials

Abstract

The present disclosure relates to methods of removing brominated contaminants from polystyrene waste and recovering the brominated contaminants. The present disclosure further relates to methods of recycling polystyrene waste, wherein the recycling comprises retention of brominated contaminants or removal of contaminants. The present disclosure also relates to use of monocyclic aromatic benzenic solvents in the removal and/or recovery of brominated contaminants from polystyrene waste and in the recycling of polystyrene waste. Moreover, the present disclosure relates to use of the recovered brominated contaminants in the manufacture of polystyrene products such as insulation.

IPC Classes  ?

• C08J 11/08 - Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components

Abstract

The present disclosure relates to methods of removing brominated contaminants from polystyrene waste and recovering the brominated contaminants. The present disclosure further relates to methods of recycling polystyrene waste, wherein the recycling comprises retention of brominated contaminants or removal of contaminants. The present disclosure also relates to use of monocyclic aromatic benzenic solvents in the removal and/or recovery of brominated contaminants from polystyrene waste and in the recycling of polystyrene waste. Moreover, the present disclosure relates to use of the recovered brominated contaminants in the manufacture of polystyrene products such as insulation.

IPC Classes  ?

• C08J 11/08 - Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components
• B01D 11/02 - Solvent extraction of solids
• B29B 17/02 - Separating plastics from other materials

Abstract

There are provided recycled polystyrene polymers having a melt flow index of less than about 25 g/10 min. There are provided processes for recycling polystyrene waste. The processes can comprise dissolving said polystyrene waste in p-cymene under conditions to obtain a polystyrene/p-cymene mixture, adding the polystyrene/p-cymene mixture to a hydrocarbon polystyrene non-solvent under conditions to obtain precipitated polystyrene and washing the precipitated polystyrene with additional portions of hydrocarbon polystyrene non-solvent under conditions to obtain twice-washed polystyrene. The twice-washed polystyrene can optionally be dried and formed into polystyrene pellets. There is also provided recycled polystyrene obtained from such processes for recycling polystyrene waste.

IPC Classes  ?

• C08J 11/08 - Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components
• B29B 17/02 - Separating plastics from other materials
• C08F 112/08 - Styrene
• C08J 11/00 - Recovery or working-up of waste materials
• C08L 25/00 - Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ringCompositions of derivatives of such polymers
• C08L 25/06 - Polystyrene

Abstract

There are provided processes for recycling waste such as polystyrene thermoplastic polymer waste and/or polystyrene thermoplastic copolymer waste as well as recycled polystyrene thermoplastic polymer and/or recycled thermoplastic copolymer that may, for example, be obtained from such processes. The processes can comprise the use of a reducing agent.

IPC Classes  ?

• C08J 11/08 - Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components
• B29B 17/02 - Separating plastics from other materials

Abstract

There are provided recycled polystyrene polymers having a melt flow index of less than about 25 g/10 min. There are provided processes for recycling polystyrene waste. The processes can comprise dissolving said polystyrene waste in p-cymene under conditions to obtain a polystyrene/p-cymene mixture, adding the polystyrene/p-cymene mixture to a hydrocarbon polystyrene non-solvent under conditions to obtain precipitated polystyrene and washing the precipitated polystyrene with additional portions of hydrocarbon polystyrene non-solvent under conditions to obtain twice-washed polystyrene. The twice-washed polystyrene can optionally be dried and formed into polystyrene pellets. There is also provided recycled polystyrene obtained from such processes for recycling polystyrene waste.

IPC Classes  ?

• C08J 11/08 - Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components
• B29B 17/02 - Separating plastics from other materials
• C08F 112/08 - Styrene
• C08L 25/06 - Polystyrene
• C08J 11/00 - Recovery or working-up of waste materials
• C08L 25/00 - Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ringCompositions of derivatives of such polymers

Abstract

There are provided processes for recycling waste such as polystyrene thermoplastic polymer waste and/or polystyrene thermoplastic copolymer waste as well as recycled polystyrene thermoplastic polymer and/or recycled thermoplastic copolymer that may, for example, be obtained from such processes. The processes can comprise dissolving the waste in cymene, xylene or ethylbenzene or a suitable solvent, to obtain a mixture followed by heating the mixture under acidic conditions and then optionally neutral conditions in the presence of a reducing agent then cooling to obtain a supernatant comprising polystyrene thermoplastic polymer and/or polystyrene thermoplastic copolymer and a solid waste residue. The supernatant can optionally be treated with a filtration aid, then the supernatant can be contacted with a hydrocarbon polystyrene non-solvent under conditions to obtain precipitated polystyrene thermoplastic polymer and/or precipitated polystyrene thermoplastic copolymer which can be washed with additional hydrocarbon polystyrene non-solvent, and optionally dried and formed into polystyrene thermoplastic polymer pellets and/or polystyrene thermoplastic copolymer pellets.

IPC Classes  ?

• C09J 11/08 - Macromolecular additives
• B29B 17/02 - Separating plastics from other materials
• C08J 11/08 - Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components

Abstract

There is provided a composition for the production of a recycled polystyrene. The composition comprises polystyrene, ethylbenzene and a non-solvent having a boiling point at 1 atm of pressure of from 98° C. to 110° C. There is also provided a method of using ethylbenzene and a non-solvent having a boiling point at 1 atm of pressure of from 98° C. to 110° C. The method comprises mixing together the ethylbenzene, the non-solvent and polystyrene for recycling the polystyrene.

IPC Classes  ?

• C08J 11/08 - Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components
• B29B 17/02 - Separating plastics from other materials

Abstract

Processes for recycling polystyrene waste. The processes can comprise dissolving the polystyrene waste in ethylbenzene under conditions to obtain a polystyrene/ethylbenzene mixture, adding the polystyrene/ethylbenzene mixture to a hydrocarbon polystyrene non-solvent under conditions to obtain precipitated polystyrene and washing the precipitated polystyrene with additional portions of hydrocarbon polystyrene non-solvent under conditions to obtain twice-washed polystyrene. The twice-washed polystyrene can optionally be dried and formed into polystyrene pellets. There is also provided recycled polystyrene obtained from such processes for recycling polystyrene waste.

IPC Classes  ?

• C08J 11/08 - Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components
• B29B 17/02 - Separating plastics from other materials

Abstract

There are provided processes for recycling waste such as polystyrene thermoplastic polymer waste and/or polystyrene thermoplastic copolymer waste as well as recycled polystyrene thermoplastic polymer and/or recycled thermoplastic copolymer that may, for example, be obtained from such processes. The processes can comprise dissolving the waste in cymene, xylene or ethylbenzene or a suitable solvent, to obtain a mixture followed by heating the mixture under acidic conditions and then optionally neutral conditions in the presence of a reducing agent then cooling to obtain a supernatant comprising polystyrene thermoplastic polymer and/or polystyrene thermoplastic copolymer and a solid waste residue. The supernatant can optionally be treated with a filtration aid, then the supernatant can be contacted with a hydrocarbon polystyrene non-solvent under conditions to obtain precipitated polystyrene thermoplastic polymer and/or precipitated polystyrene thermoplastic copolymer which can be washed with additional hydrocarbon polystyrene non- solvent, and optionally dried and formed into polystyrene thermoplastic polymer pellets and/or polystyrene thermoplastic copolymer pellets.

IPC Classes  ?

• B29B 17/00 - Recovery of plastics or other constituents of waste material containing plastics

Abstract

There are provided processes for recycling waste such as polystyrene thermoplastic polymer waste and/or polystyrene thermoplastic copolymer waste as well as recycled polystyrene thermoplastic polymer and/or recycled thermoplastic copolymer that may, for example, be obtained from such processes. The processes can comprise dissolving the waste in cymene, xylene or ethylbenzene or a suitable solvent, to obtain a mixture followed by heating the mixture under acidic conditions and then optionally neutral conditions in the presence of a reducing agent then cooling to obtain a supernatant comprising polystyrene thermoplastic polymer and/or polystyrene thermoplastic copolymer and a solid waste residue. The supernatant can optionally be treated with a filtration aid, then the supernatant can be contacted with a hydrocarbon polystyrene non-solvent under conditions to obtain precipitated polystyrene thermoplastic polymer and/or precipitated polystyrene thermoplastic copolymer which can be washed with additional hydrocarbon polystyrene non-solvent, and optionally dried and formed into polystyrene thermoplastic polymer pellets and/or polystyrene thermoplastic copolymer pellets.

IPC Classes  ?

• B29B 17/00 - Recovery of plastics or other constituents of waste material containing plastics
• B29B 17/02 - Separating plastics from other materials
• C08J 11/04 - Recovery or working-up of waste materials of polymers
• C08J 11/08 - Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components

Abstract

There are provided processes for recycling waste such as polystyrene thermoplastic polymer waste and/or polystyrene thermoplastic copolymer waste as well as recycled polystyrene thermoplastic polymer and/or recycled thermoplastic copolymer that may, for example, be obtained from such processes. The processes can comprise dissolving the waste in cymene, xylene or ethylbenzene or a suitable solvent, to obtain a mixture followed by heating the mixture under acidic conditions and then optionally neutral conditions in the presence of a reducing agent then cooling to obtain a supernatant comprising polystyrene thermoplastic polymer and/or polystyrene thermoplastic copolymer and a solid waste residue. The supernatant can optionally be treated with a filtration aid, then the supernatant can be contacted with a hydrocarbon polystyrene non-solvent under conditions to obtain precipitated polystyrene thermoplastic polymer and/or precipitated polystyrene thermoplastic copolymer which can be washed with additional hydrocarbon polystyrene non-solvent, and optionally dried and formed into polystyrene thermoplastic polymer pellets and/or polystyrene thermoplastic copolymer pellets.

IPC Classes  ?

• B29B 17/00 - Recovery of plastics or other constituents of waste material containing plastics
• C08F 12/08 - Styrene
• C08J 11/08 - Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components

Abstract

There are provided processes for recycling waste such as polystyrene thermoplastic polymer waste and/or polystyrene thermoplastic copolymer waste as well as recycled polystyrene thermoplastic polymer and/or recycled thermoplastic copolymer that may, for example, be obtained from such processes. The processes can comprise dissolving the waste in cymene, xylene or ethylbenzene or a suitable solvent, to obtain a mixture followed by heating the mixture under acidic conditions and then optionally neutral conditions in the presence of a reducing agent then cooling to obtain a supernatant comprising polystyrene thermoplastic polymer and/or polystyrene thermoplastic copolymer and a solid waste residue. The supernatant can optionally be treated with a filtration aid, then the supernatant can be contacted with a hydrocarbon polystyrene non-solvent under conditions to obtain precipitated polystyrene thermoplastic polymer and/or precipitated polystyrene thermoplastic copolymer which can be washed with additional hydrocarbon polystyrene non-solvent, and optionally dried and formed into polystyrene thermoplastic polymer pellets and/or polystyrene thermoplastic copolymer pellets.

IPC Classes  ?

• C08J 11/08 - Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components
• B29B 17/00 - Recovery of plastics or other constituents of waste material containing plastics
• C08F 12/08 - Styrene

Abstract

The present disclosure relates to the use of a combination of ethylbenzene and a non-solvent having a boiling point at 1 atm of pressure of from 98 C to 110 C for recycling polystyrene waste. For example, the non-solvent is an alkane or mixtures thereof. The disclosure also relates to a composition for use in recycling polystyrene waste, wherein the composition comprises polystyrene waste, ethylbenzene and a non-solvent having a boiling point at 1 atm of pressure of from 98 C to 110 C. For example, the non-solvent is an alkane or mixtures thereof.

IPC Classes  ?

• C07C 9/14 - Acyclic saturated hydrocarbons with five to fifteen carbon atoms
• C07C 15/073 - Ethylbenzene
• C08F 12/08 - Styrene
• C08L 25/06 - Polystyrene

Abstract

There are provided processes for recycling polystyrene waste. The processes can comprise dissolving said polystyrene waste in ethylbenzene under conditions to obtain a polystyrene/ethylbenzene mixture, adding the polystyrene/ethylbenzene mixture to a hydrocarbon polystyrene non-solvent under conditions to obtain precipitated polystyrene and washing the precipitated polystyrene with additional portions of hydrocarbon polystyrene non-solvent under conditions to obtain twice-washed polystyrene. The twice-washed polystyrene can optionally be dried and formed into polystyrene pellets. There is also provided recycled polystyrene obtained from such processes for recycling polystyrene waste.

IPC Classes  ?

• C08J 11/08 - Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components

Abstract

There are provided processes for recycling polystyrene waste. The processes can comprise dissolving said polystyrene waste in ethylbenzene under conditions to obtain a polystyrene/ethylbenzene mixture, adding the polystyrene/ethylbenzene mixture to a hydrocarbon polystyrene non-solvent under conditions to obtain precipitated polystyrene and washing the precipitated polystyrene with additional portions of hydrocarbon polystyrene non-solvent under conditions to obtain twice-washed polystyrene. The twice-washed polystyrene can optionally be dried and formed into polystyrene pellets. There is also provided recycled polystyrene obtained from such processes for recycling polystyrene waste.

IPC Classes  ?

• C08J 11/08 - Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components

Abstract

A recycled polystyrene having a melt flow index of less than 25 g/10min and a content of additive(s) of less than 1 wt%. The additives are chosen from coloring agents, fillers, flame retardants, lubricants, and plasticizers. The recycled polystyrene comprises about 0.05 wt% to about 0.3 wt% ethylbenzene and comprises heptane. Moreover, the recycled polystyrene comprises about 0.1 wt% to about 2 wt% of octadecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)-propionate. The recycled polystyrene allows for significantly increasing the life cycle of recycled polystyrene.

IPC Classes  ?

• C08J 11/08 - Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components
• C08K 5/01 - Hydrocarbons
• C08L 25/06 - Polystyrene

Abstract

There are provided recycled polystyrene polymers having a melt flow index of less than about 25 g/10min. There are provided processes for recycling polystyrene waste. The processes can comprise dissolving said polystyrene waste in p-cymene under conditions to obtain a polystyrene/p-cymene mixture, adding the polystyrene/p-cymene mixture to a hydrocarbon polystyrene non-solvent under conditions to obtain precipitated polystyrene and washing the precipitated polystyrene with additional portions of hydrocarbon polystyrene non-solvent under conditions to obtain twice-washed polystyrene. The twice-washed polystyrene can optionally be dried and formed into polystyrene pellets. There is also provided recycled polystyrene obtained from such processes for recycling polystyrene waste.

IPC Classes  ?

• B29B 17/00 - Recovery of plastics or other constituents of waste material containing plastics
• C08F 112/08 - Styrene
• C08J 11/08 - Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components
• C08K 5/01 - Hydrocarbons
• C08L 25/06 - Polystyrene

Abstract

There are provided recycled polystyrene polymers having a melt flow index of less than about 25 g/10min. There are provided processes for recycling polystyrene waste. The processes can comprise dissolving said polystyrene waste in p-cymene under conditions to obtain a polystyrene/p-cymene mixture, adding the polystyrene/p-cymene mixture to a hydrocarbon polystyrene non-solvent under conditions to obtain precipitated polystyrene and washing the precipitated polystyrene with additional portions of hydrocarbon polystyrene non-solvent under conditions to obtain twice-washed polystyrene. The twice-washed polystyrene can optionally be dried and formed into polystyrene pellets. There is also provided recycled polystyrene obtained from such processes for recycling polystyrene waste.

IPC Classes  ?

• B29B 17/02 - Separating plastics from other materials
• C08F 112/08 - Styrene
• C08J 11/08 - Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components
• C08L 25/06 - Polystyrene

Abstract

Provided is use of a combination of p-cymene and a non-solvent having a boiling point at 1 atm of pressure of from 98°C to 110°C for recycling polystyrene waste. Also provided is a composition for use in recycling polystyrene waste, wherein the composition comprises polystyrene waste, p-cymene and a non-solvent having a boiling point at 1 atm of pressure of from 98°C to 110°C.

IPC Classes  ?

• C08J 11/08 - Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components

Abstract

There are provided recycled polystyrene polymers having a melt flow index of less than about 25 g/10min. There are provided processes for recycling polystyrene waste. The processes can comprise dissolving said polystyrene waste in p-cymene under conditions to obtain a polystyrene/p-cymene mixture, adding the polystyrene/p-cymene mixture to a hydrocarbon polystyrene non-solvent under conditions to obtain precipitated polystyrene and washing the precipitated polystyrene with additional portions of hydrocarbon polystyrene non-solvent under conditions to obtain twice-washed polystyrene. The twice-washed polystyrene can optionally be dried and formed into polystyrene pellets. There is also provided recycled polystyrene obtained from such processes for recycling polystyrene waste.

IPC Classes  ?

• C08F 112/08 - Styrene
• B29B 17/02 - Separating plastics from other materials
• C08J 11/08 - Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components
• C08L 25/06 - Polystyrene

Goods & Services

(1) Machine pour recycler le polystyrène provenant des industries, des commerces, des institutions, des municipalités, des centres de tri et des consommateurs (2) Résine de polystyrène recyclé (1) Service de collecte de polystyrène provenant des industries, des commerces, des institutions, des municipalités, des centres de tri et des consommateurs (2) Traitement et transformation de résidus de polystyrène