Abstract

A process for preparing a thermoplastic vulcanizate, the process comprising: charging a reactor with an olefmic copolymer rubber, where the olefmic copolymer rubber is characterized by a multimodal molecular weight, an average branching index of greater than 0.8, includes less than 10 parts by weight oil per 100 parts by weight rubber, includes less than 1 parts by weight non-rubber particulate, per 100 parts by weight rubber, and is in the form of granules having a particle size less than 8 mm; charging the reactor, contemporaneously or sequentially with respect to the rubber, with a thermoplastic resin, an oil, and a cure system; melt mixing the rubber, the thermoplastic resin, the oil, and the cure system; and dynamically vulcanizing the rubber.

IPC Classes  ?

• C08L 23/10 - Homopolymers or copolymers of propene
• C08L 23/16 - Ethene-propene or ethene-propene-diene copolymers

Abstract

A thermoplastic vulcanizate comprising of a dynamically-cured rubber; and a thermoplastic phase, where the thermoplastic phase includes fiber and the reaction product of a methylene donor and a methylene acceptor. The thermoplastic phase could include a functionalized thermoplastic resin.

IPC Classes  ?

• C08L 23/16 - Ethene-propene or ethene-propene-diene copolymers
• C08L 23/10 - Homopolymers or copolymers of propene
• C08L 23/04 - Homopolymers or copolymers of ethene
• C08J 5/04 - Reinforcing macromolecular compounds with loose or coherent fibrous material

Abstract

Disclosed in one aspect is a pipe comprising a composition of one or more propylene-α-olefm copolymers comprising propylene-derived units and from 5 to 35 wt%, by weight of the propylene-α-olefin copolymer, of ethylene-derived units and/or a C4 to C10 α-olefin-derived unit, and having (i) a density from 0.850 to 0.920 g/cm3; (ii) an Hf of less than 75 J/g; and (iii) a Tm of less than 105°C; and at least one additional component selected from the group consisting of propylene random copolymers having a comonomer content of less than 5 wt%, a propylene block copolymer, propylene homopolymer and combinations thereof; wherein the pipe composition possesses a Flexural Modulus (23°C) less than 650 MPa, an Izod Impact (23°C) greater than 30 kJ/m2, and a Vicat Softening Temperature greater than 110°C.°

IPC Classes  ?

• C08L 23/10 - Homopolymers or copolymers of propene

Abstract

An aspect of the description is directed to hydrolysable silane graft propylene-α-olefm copolymers useful for moisture curable sealants, the copolymers comprising a propylene-α- olefin copolymer component comprising propylene-derived units and from 5 to 35 wt%, by weight of the propylene-α-olefm copolymer, of ethylene-derived units or a C4 to C10 α-olefm- derived unit, and having, in one embodiment, the following features: a density of from 0.850 to 0.920 g/cm3; a MWD of from 1.5 to 20; an Hf of less than or equal to 75 J/g; a Tm of from 25 to 105°C; and a triad tacticity by 13C NMR of 75% or greater; and a hydrolysable silane component. The graft copolymer can be combined with oil and/or a thermoplastic to form a graft copolymer composition capable of being cross-linked by exposure to moisture.

IPC Classes  ?

• C08F 255/04 - Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group on to polymers of olefins having two or three carbon atoms on to ethene-propene copolymers
• C08L 51/06 - Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bondsCompositions of derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond

Abstract

Laminates of the present invention include a substrate layer and at least one slip-coat layer. The slip-coat layer has a relatively low coefficient of friction. In one embodiment, the laminate forms at least a portion of a weather seal with the slip-coat making contact with, for example, a movable window of an automobile. In one aspect, the slip-coat includes (i) a high density polyethylene mixture including (a) a first high density polyethylene having a relatively low I2 and (b) a second high density polyethylene having a relatively high I2 (ii) a plastomer; (iii) a styrenic block copolymer; and (iv) a thermoplastic vulcanizate, and optionally (v) a low density polyethylene graft copolymer. In a particular embodiment, fatty acid amide slip agents are absent from the slip-coat composition.

IPC Classes  ?

• B32B 27/32 - Layered products essentially comprising synthetic resin comprising polyolefins
• C08L 23/06 - Polyethene
• B60J 10/00 - Sealing arrangements

Abstract

A support roller and dryer using the same are provided. The roller can include a hub, a ring concentrically disposed about the hub, a first thermoplastic elastomer disposed between the hub and the ring, and a second thermoplastic elastomer disposed about the ring. The dryer can include a drum for containing one or more items of clothing and one or more support rollers in communication with the drum.

IPC Classes  ?

• D06F 58/08 - Driving arrangements
• B60B 33/00 - Castors in general

Abstract

A thermoplastic vulcanizate comprising a dynamically cured rubber, where the rubber is peroxide cured, and a thermoplastic phase, where at least 10% by weight of the thermoplastic phase includes an ultrahigh molecular weight plastic, where the ultrahigh molecular weight plastic is characterized by a Mw that is greater than 0.8 x 106 g/mole.

IPC Classes  ?

• C08L 23/16 - Ethene-propene or ethene-propene-diene copolymers

Abstract

Provided are thermoplastic polymer compositions having a single melting point, articles made therefrom, and methods for elevating the melting point of low melting point polymers. Thermoplastic polymer compositions are composed of one or more high melting point polyolefins and a thermoplastic component that includes a low melting point polypropylene. High melting point polyolefins are composed of a stereoregular polypropylene having a tacticity similar to the low melting point polypropylene. The low melting point polypropylene includes, for example, propylene homopolymers and copolymers composed of propylene and one or more comonomers. Thermoplastic polymer compositions may also optionally contain any of the various additives commonly used in such polymer compositions, such as for example oils, etc. In one embodiment, thermoplastic polymer compositions are thermoplastic elastomer compositions that include an elastomeric component composed of an elastomer or rubber. The elastomeric component may be substantially or partially crosslinked to form a thermoplastic vulcanizate.

IPC Classes  ?

• C08L 23/14 - Copolymers of propene

Abstract

A method for preparing a thermoplastic vulcanizate, the method comprising introducing an elastomer and a thermoplastic resin to a reaction extruder, where the elastomer is not prepared by gas-phase polymerization methods, and where less than 75 parts by weight oil, per 100 parts by weight elastomer, is added to the extruder with the elastomer, introducing a curative to the extruder after said step of introducing an elastomer, introducing an oil to the extruder after said step of introducing an elastomer but before or together with said step of introducing a curative, and introducing an oil to the extruder after said step of introducing a curative.

IPC Classes  ?

• C08L 23/16 - Ethene-propene or ethene-propene-diene copolymers

Abstract

A method for preparing a thermoplastic vulcanizate, the method comprising dynamically vulcanizing a rubber within a blend that includes the rubber and a thermoplastic polymer, where said dynamically vulcanizing is effected with a cure system that includes a hydrosilating agent and a catalyst, where the hydrosilating agent includes a compound including at least 3 silicon hydride groups defined by the formula where each R is independently a monovalent organic group or hydrogen, and where the silicon atoms of the respective silicon hydride groups are spatially separated by at least 6 atoms.

IPC Classes  ?

• C08L 23/04 - Homopolymers or copolymers of ethene
• C08L 23/10 - Homopolymers or copolymers of propene
• C08L 23/16 - Ethene-propene or ethene-propene-diene copolymers
• B29C 47/40 - using at least two intermeshing screws
• C08K 5/54 - Silicon-containing compounds
• C08K 5/00 - Use of organic ingredients
• C08L 21/00 - Compositions of unspecified rubbers
• C08L 91/06 - Waxes
• C08L 83/04 - Polysiloxanes

Abstract

Provided are thermoplastic elastomer compositions, many dynamically vulcanized, with superior crystallization kinetics, methods for making the compositions and articles made therefrom. The thermoplastic elastomer compositions comprise at least a propylene polymer thermoplastic, a rubber and a crystallization additive. The processes for preparation of the thermoplastic elastomer compositions comprises dynamic vulcanization of mixture of a propylene polymer thermoplastic, a rubber and a cure agent followed by addition of a crystallization additive. Further, preparation of articles from the thermoplastic elastomer compositions may be accomplished through traditional thermoforming operations useful with conventional thermoplastics.

IPC Classes  ?

• C08L 23/10 - Homopolymers or copolymers of propene
• C08L 21/00 - Compositions of unspecified rubbers
• C08K 3/00 - Use of inorganic substances as compounding ingredients
• C08K 5/00 - Use of organic ingredients

Abstract

A thermoplastic vulcanizate comprising (i) a dynamically-cured rubber, and (ii) a thermoplastic polymer component, where the thermoplastic polymer component includes (a) a propylene-α-olefin thermoplastic copolymer characterized by including at least 5% by weight up to 35% by weight units deriving from α-olefms, and having a heat of fusion, as determined by DSC, of less than 80 J/g, (b) and a functionalized thermoplastic polymer.

IPC Classes  ?

• C08L 101/00 - Compositions of unspecified macromolecular compounds
• C08L 51/06 - Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bondsCompositions of derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
• C08L 23/14 - Copolymers of propene

Abstract

The instant disclosure is directed to a thermoplastic vulcanizate composition comprising a dynamically-cured rubber; from about 20 to about 300 parts by weight of a thermoplastic resin per 100 parts by weight rubber and from about 30 to about 250 parts by weight additional oil per 100 parts by weight rubber; wherein the rubber comprises a multimodal polymer composition cured with a curing agent, the multimodal polymer composition comprising 45 to 75 wt% of a first polymer fraction and 25 to 55 wt% of a second polymer fraction, each comprising ethylene, a C3-C10 alpha-olefin, and a non-conjugated diene, wherein the polymer fractions have been polymerized using a Ziegler-Natta catalyst system, wherein the first polymer fraction has a Mooney viscosity of greater than or equal to about 150 ML(1+4@125°C), and the second polymer fraction has a Mooney viscosity of about 20 ML to about 120 ML; and about 10 phr to about 50 phr of an extender oil. A method of producing the thermoplastic vulcanizate is also disclosed.

IPC Classes  ?

• C08L 23/16 - Ethene-propene or ethene-propene-diene copolymers
• C08L 23/10 - Homopolymers or copolymers of propene

Abstract

Thermoplastic vulcanizates having improved physical properties, including extrusion surface roughness can be achieved by a method that includes a first processing step to form a fully cured TPV base, a cooling step wherein the fully cured TPV base is solidified and a second processing step which imparts improved physical properties including improved extrusion surface roughness to the resultant TPV. The method may be adapted for use in conjunction with a peroxide curing agents to protect a portion of the thermoplastic, which may be polypropylene, from degradation by the peroxide curing agent. The adaptation to the methods may include the addition of a portion of the thermoplastic to the TPV after the peroxide curing agent has been added. The adaptation may also include one or more devolatalization steps with or without the addition of a stripping agent.

IPC Classes  ?

• C08L 23/10 - Homopolymers or copolymers of propene
• C08L 23/16 - Ethene-propene or ethene-propene-diene copolymers
• B29C 47/00 - Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor (extrusion blow-moulding B29C 49/04)

Abstract

A thermoplastic vulcanizate comprising a dynamically-cured rubber, a thermoplastic polymer, and at least 2 percent by weight, based on the total weight of the thermoplastic vulcanizate, of a polyalphaolefm oligomer, where the polyalphaolefm oligomer is characterized by a kinematic viscosity per ASTM D445 at 100°C of at least 35 cSt.

IPC Classes  ?

• C08L 23/00 - Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bondCompositions of derivatives of such polymers

Abstract

Provided for preparing thermoplastic polymer blends is (1) an apparatus comprising a grinder (105), a mixer (120), at least one material transfer device (110), a weigh scale (125), means (115) for addition of additives to the mixer, a storage vessel (135), a processing device (155) and means (140) for feeding polymer to the processing device,- and (2) a process comprising mixing a known amount of a first material with a desired amount of at least one additive based on a predetermined weight ratio of additive to first material to form individual batches of pre-mix, storing the pre-mix batches in a storage vessel, continuously feeding the pre-mix from the storage vessel to a processing device, adding a polymer stream (145) to the processing device at a rate based on the first material feed rate to the processing device, optionally adding at least one vulcanizing agent stream (150) to the processing device at a rate based on the polymer stream feed rate to the processing device and melt mixing all materials in the processing device to form a thermoplastic polymer blend (160).

IPC Classes  ?

• B29B 7/24 - Component parts, details or accessoriesAuxiliary operations for feeding
• B29B 7/74 - MixingKneading using other mixers or combinations of dissimilar mixers
• B29B 7/88 - Adding charges
• B01F 15/04 - Forming a predetermined ratio of the substances to be mixed
• B01F 13/10 - Mixing plant, including combinations of dissimilar mixers
• G05D 11/13 - Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means
• G01G 13/285 - Weighing mechanism control arrangements for automatic feed or discharge involving variation of an electrical variable which is used to control loading or discharge of the receptacle involving comparison with a reference value
• G01G 19/38 - Weighing apparatus or methods adapted for special purposes not provided for in groups for apportioning materials by weighing prior to mixing them programme controlled, e.g. by perforated tape

Abstract

A thermoplastic elastomer having adhesion to steels, where the thermoplastic elastomer includes a dynamically crosslinked rubber, from more than 2.0 to 10 parts of a metal oxide or salt, and from 10 to 200 parts by weight of a functionalized polyolefin having pendant polar functional groups, where the polar functional groups are present at a level of 0.5 to 3.5 mole percent of the total repeating units of said functionalized polyolefin and the functionalized polyolefin is derived from polymerizing at least one monoolefin to form a semicrystalline polymer or is derived from hydrogenating the polydiene blocks of a block copolymer, and where the parts by weight are based on 100 parts by weight of crosslinked rubber.

IPC Classes  ?

• C08L 23/16 - Ethene-propene or ethene-propene-diene copolymers
• C08L 21/00 - Compositions of unspecified rubbers
• C08K 3/20 - OxidesHydroxides
• C08K 3/26 - CarbonatesBicarbonates
• C09J 11/04 - Non-macromolecular additives inorganic
• C08L 51/06 - Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bondsCompositions of derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond