C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
400/105
C09K 3/00 (2006.01) C08G 18/08 (2006.01) C08G 18/32 (2006.01) C08G 18/40 (2006.01) C08G 18/62 (2006.01) C08L 75/04 (2006.01)
Patent
CA 1216980
ABSTRACT Polymer-Modified Polyols Polymer-modified polyols of reduced viscosity are made by reacting an organic polyisocyanate with a low molecular weight hydroxyl-containing compound in a polyol in the presence of a specified dispersant. The dispersant, which is of a type known for dispersing pigments in paints, is obtained by reacting (1) a copolymer comprising units derived from the following ethylenically unsaturated monomers in the stated proportions by weight based on the total weight of the copolymer: (a) 0-50% of a hydroxy group-containing monomer, and/or (b) 0.20% of an amide group-containing monomer, provided that there is always present at least 5% of (a) and (b); (c) 20-80% of a monomer free from carboxyl groups and containing a straight or branched chain alkyl group of from 7 to 22 carbon atoms, and (d) 0-50% of one or more monomers free from the hydroxy, amide and C7-22 alkyl groups present in (a), (b) or (c), and also, as an essential constituent, (e) up to 20% of a monomer containing an epoxide group, the total of monomers (a), (b), (c), (d) and (e) being 100%, with (2) a compound bearing a carboxyl group and a group having pigment dispersant characteristics. Preferably, it is a copolymer of styrene; 2-ethyl hexyl acrylate; hydroxy isopropylmethacrylate; methacrylamide; glycidyl methacrylate in the ratios 26:40:25:5:4, modified by esterification with p-aminobenzoic acid in the presence of dimethyl dodecyl tertiary amine. The modified polyols of particular interest are those used in the manufacture of flexible foam slabstock.
456088
Ballantyne Donald G.
Imperial Chemical Industries Plc
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