Abstract

This aqueous polyurethane resin composition comprises an aqueous polyurethane resin obtained by extending, with (D) a polyamine having two or more amino groups and/or imino groups in one molecule, a chain of a neutralized product of an isocyanate group-terminated prepolymer that is a reaction product of (A) a polyisocyanate, (B) a polyol, and (C) a diol having a carboxy group and/or a carboxylate group, wherein the polyisocyanate (A) includes (a-1) isophorone diisocyanate and (a-2) hexamethylene diisocyanate; and the polyamine (D) includes at least one selected from the group consisting of (d-1) piperazine and (d-2) dibasic acid dihydrazides.

IPC Classes  ?

• C08G 18/10 - Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
• C08G 18/00 - Polymeric products of isocyanates or isothiocyanates
• C08G 18/32 - Polyhydroxy compoundsPolyaminesHydroxy amines
• C08G 18/66 - Compounds of groups , , or
• C08G 18/72 - Polyisocyanates or polyisothiocyanates

Abstract

An aqueous polyurethane resin composition including: an aqueous polyurethane resin which is a chain-extended product obtained from a neutralized product of an isocyanate-terminated prepolymer which is a reaction product of (A) a polyisocyanate, (B) polyols, and (C) a diol having a carboxy group and/or a carboxylate group, by using (D) a polyamine having two or more amino groups and/or imino groups in one molecule, wherein (B) the polyols contain (b-1) a polypropylene glycol having a number average molecular weight of 600 to 10,000 and (b-2) a polytetramethylene glycol having a number average molecular weight of 1,000 to 4,000, a total amount of (b-1) the polypropylene glycol and (b-2) the polytetramethylene glycol accounts for 50% by mass or more of an entire amount of (B) the polyols, and a mass ratio between (b-1) the polypropylene glycol and (b-2) the polytetramethylene glycol is (b-1):(b-2)=0.5:99.5 to 60:40.

IPC Classes  ?

• C08L 75/12 - Polyurethanes from compounds containing nitrogen and active hydrogen, the nitrogen atom not being part of an isocyanate group
• C08K 5/29 - Compounds containing carbon-to-nitrogen double bonds
• C08G 18/08 - Processes
• C08G 18/32 - Polyhydroxy compoundsPolyaminesHydroxy amines
• C08G 18/48 - Polyethers
• C08G 18/10 - Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step

Abstract

An aqueous polyurethane resin composition contains an aqueous polyurethane resin that is a chain elongation product, elongated by (D) a polyamine having two or more amino groups and/or imino groups in a molecule, of a neutralized product of an isocyanate group-terminated prepolymer that is a reaction product of (A) a polyisocyanate, (B) a polyol, and (C) a diol having a carboxy group and/or a carboxylate group. The (B) polyol includes (b-1) a polypropylene glycol having a number average molecular weight of 600-10,000 and (b-2) a polytetramethylene glycol having a number average molecular weight of 1000-4000. The total amount of the (b-1) polypropylene glycol and the (b-2) polytetramethylene glycol relative to the total amount of the (B) polyol is 50 mass% or above. The mass ratio between the (b-1) polypropylene glycol and the (b-2) polytetramethylene glycol is (b-1):(b-2) = 0.5:99.5 to 60:40.

IPC Classes  ?

• C08G 18/08 - Processes
• C08G 18/00 - Polymeric products of isocyanates or isothiocyanates
• C08G 18/12 - Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step using two or more compounds having active hydrogen in the first polymerisation step
• C08G 18/32 - Polyhydroxy compoundsPolyaminesHydroxy amines
• C08G 18/48 - Polyethers
• C08G 18/66 - Compounds of groups , , or
• C08J 5/18 - Manufacture of films or sheets
• C08L 75/12 - Polyurethanes from compounds containing nitrogen and active hydrogen, the nitrogen atom not being part of an isocyanate group

Abstract

Provided are: a liquid reducing agent composition that has advantages of reducing sugars such as less decrease of reducing power over time, less odor, and minor impact on the human body and the environment, and can further have good robustness; and a method for reducing and washing a substrate. In one embodiment, provided is a liquid reducing agent composition containing: (A) a reducing sugar; (B) an amphiphilic component that is at least one compound selected from the group consisting of (B1) polyester resins having an aromatic carbon ring, and (B2) compounds represented by general formula (1); and water. In one embodiment, provided is a method for reducing and washing a substrate, the method comprising washing a substrate in the presence of (A) a reducing sugar, and (B) an amphiphilic component that is at least one compound selected from the group consisting of (B1) polyester resins having an aromatic carbon ring, and (B2) compounds represented by general formula (1).

IPC Classes  ?

• D06P 3/54 - Polyesters using dispersed dyestuffs
• D06L 4/30 - Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goodsBleaching leather or furs using reducing agents
• D06P 5/04 - After-treatment with organic compounds
• D06P 5/08 - After-treatment with organic compounds macromolecular