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US 2006/0079591 A1Published application
Novel foam modifier, foams prepared from this novel foam modifier and a process for the preparation of these foams
AssigneeBayer MaterialScience AG
InventorsNathan Anderson, Veril Jividen, Stanley Hager
Life of this patent
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Abstract
This invention relates to novel foam modifiers which can be used to prepare flexible foams. These novel foam modifiers provide improved processability and improved properties of the resultant flexible foams. The present invention also relates to the process of preparing these flexible foams and to the resultant foams.
Claims25
A process for the preparation of a flexible polyurethane foam having a density of less than 8 pcf, comprising:
- (I) reacting
- (1) an aromatic polyisocyanate component having a functionality of at least about 2.0;
- (2) from about 90 to about 99.8 parts, based on 100 parts by weight of (2) and (3), of an isocyanate-reactive component comprising one or more polyoxyalkylene polyether polyols having from 2 to 8 hydroxyl groups, an OH number of about 11 to about 280 and containing less than 30% by weight of copolymerized oxyethylene, based on 100% by weight oxyalkylene;
- (3) from about 0.2 to about 10 parts, based on 100 parts by weight of (2) and (3), of a foam modifier comprising
- (a) from about 35 to about 80% by weight, based on the total weight of component (3), of at least one low molecular weight compound selected from the group consisting of 1,3-propanediol, 1,3-butanediol and 1,4-butanediol, and
- (b) from about 20 to about 65% by weight, based on the total weight of component (3), of one or more polyether polyols having from 2 to 8 hydroxyl groups, an OH number of from about 11 to about 280 and having greater than 50% by weight, based on 100% by weight of oxyalkylene, of copolymerized oxyethylene;
- in the presence of:
- (4) one or more blowing agents;
- (5) one or more catalysts;
- and
- (6) one or more surfactants;
- wherein the Isocyanate index is at least about 98.
9 more elements
A flexible polyurethane foam having a density of less than 8 pcf, comprising the reaction product of
- (1) an aromatic polyisocyanate component having a functionality of at least about 2.0;
- (2) from about 90 to about 99.8 parts, based on 100 parts by weight of (2) and (3), of an isocyanate-reactive component comprising one or more polyoxyalkylene polyether polyols having from 2 to 8 hydroxyl groups, an OH number of from about 11 to about 280 and containing less than 30% by weight of copolymerized oxyethylene, based on 100% by weight of oxyalkylene;
- (3) from about 0.2 to about 10 parts, based on 100 parts by weight of (2) and (3), of a foam modifier comprising
- (a) from about 35 to about 80% by weight, based on the total weight of component (3), of at least one low molecular weight compound selected from the group consisting of 1,3-propanediol, 1,3-butanediol and 1,4-butanediol, and
- (b) from about 20 to about 65% by weight, based on the total weight of component (3), of one or more polyether polyols having from 2 to 8 hydroxyl group, an equivalent weight of 200 to 5,000 and having greater than 50% by weight of copolymerized oxyethylene, based on 100% by weight of oxyalkylene;
- in the presence of:
- (4) one or more blowing agents;
- (5) one or more catalysts;
- and
- (6) one or more surfactants;
- wherein the Isocyanate index is at least about 98.
8 more elements
A foam modifier comprising:
- (a) from 35 to 75% by weight, based on the total weight of the composition, of one or more compounds selected from the group consisting of 1,3-propanediol, 1,3-butanediol, 1,4-butanediol and mixtures thereof;
- (b) from 20 to 60% by weight, based on the total weight of the composition, of one or more polyether polyols containing from 2 to 8 hydroxyl groups per molecule, having an OH number of from about 11 to about 280, and containing greater than 50% by weight, based on 100% by weight of oxyalkylene, of copolymerized oxyethylene;
- and
- (c) from 5 to 25% by weight, based on the total weight of the composition, of dipropylene glycol;
1 more element
Dependencies are inferred from the claim text.