# US 5,710,220 A · Graft polymer dispersion having a third monomer and polyurethane foams having a reduced tendency to shrink prepared thereby

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- Number: US 5,710,220 A
- Document ID: US5710220A
- Status: Granted
- Kind: A
- Application number: 08/500,077
- Filed: 1995-07-10
- Granted: 1998-01-20
- Earliest claimed: 1994-01-21
- Assignees: BASF SE
- Inventors: Duane A. Heyman; James A. Gallagher
- Web page: https://patentgrep.com/patent/US5710220A

## CPC

- C08F 290/142: {Polyethers}
- C08F 261/02: on to polymers of unsaturated alcohols
- C08F 283/00: Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F 283/06: on to polyethers, polyoxymethylenes or polyacetals {(C08F283/004 takes precedence)}
- C08F 283/065: {on to unsaturated polyethers, polyoxymethylenes or polyacetals}
- C08F 290/062: {Polyethers}
- C08F 290/14: Polymers provided for in subclass C08G
- C08F 291/08: on to macromolecules containing hydroxy radicals
- C08G 18/4072: {Mixtures of compounds of group C08G18/63 with other macromolecular compounds}
- C08G 18/632: {onto polyethers}
- C08G 18/633: {onto polymers of compounds having carbon-to-carbon double bonds}
- C08G 18/635: {onto unsaturated polymers}
- C08G 18/638: {characterised by the use of compounds having carbon-to-carbon double bonds other than styrene and/or olefinic nitriles}
- C08G 2110/0008: flexible
- C08G 2110/005: < 50kg/m3
- C08G 2110/0083: prepared using water as the sole blowing agent
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS

## Abstract

There is a provided a stable low viscosity graft polymer dispersion comprising from 25 to 60 weight percent based on the total weight of the polymer dispersion of at least three ethylenically unsaturated monomers polymerized in the presence of a reaction moderator and a free radical initiator in a polyol mixture initially containing less than 0.1 moles of induced unsaturation per mole of said polyol mixture. One of the monomers in the mixture of ethylenically unsaturated monomers is a hydroxylfunctional or aminofunctional C.sub.2 -C.sub.6 alkyl methacrylate.

## Claims

### Claim 1

A stable low viscosity graft polymer dispersion comprising from 25 to 60 weight percent based on the total weight of the polymer dispersion of a mixture of at least three ethylenically unsaturated monomers polymerized in the presence of a reaction moderator and a free radical initiator in a polyol mixture initially containing less than 0.1 moles of induced unsaturation per mole of said polyol mixture; wherein said mixture of ethylenically unsaturated monomers comprises (a) acrylonitrile, (b) 40 weight percent to 80 weight percent, based on the weight of the monomer mixture, styrene or 4-methylstyrene, and (c) 10 weight percent to 25weight percent, based on the weight of the monomer mixture, 2-hydroxyethyl methacrylate.