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US 2019/0153148 A1Published application
Flexible polyurethane foams
AssigneeCovestro LLC
InventorsNigel Barksby, Brian L. Neal
Life of this patent
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Abstract
This invention relates to a process for preparing a flexible polyurethane foam in which the isocyanate-reactive component comprises a specific isocyanate-reactive component. The invention also relates to flexible polyurethane foam wherein the isocyanate-reactive comprises the specific isocyanate-reactive component.
Claims19
A flexible polyurethane foam comprising the reaction product of:
- (1) toluene diisocyanate,
- with
- (2) an isocyanate-reactive component comprising:
- (a) from 70 to 95% by weight, based on 100% by weight of component (a) and component (b), of an in-situ formed polyol blend having a hydroxyl number of from about 56 mg KOH/g polyol to about 250 mg KOH/g polyol, an average functionality greater than about 2 and comprising:
- (i) from 25 to 75% by weight, based on 100% by weight of (i) and (ii), of a polyether monol having a hydroxyl number of less than 56 mg KOH/g polyol, and containing less than 20% by weight of copolymerized oxyethylene, based on 100% by weight of (a)(i),
- and
- (ii) from 25 to 75% by weight, based on 100% by weight of (i) and (ii), of a polyether polyol having a hydroxyl number of about 47 mg KOH/g polyol to about 300 mg KOH/g polyol, an average functionality of greater than 2 to about 6, and containing from about 5 to about 45% by weight of copolymerized oxyethylene, based on 100% by weight of (a)(ii);
- and
- (b) from 5 to 30% by weight, based on 100% by weight of component (a) and component (b), of a filled polyol;
- in the presence of
- (3) a blowing agent;
- (4) a catalyst;
- and
- (5) a surfactant;
- wherein the resultant foam has a 90% compression set of less than or equal to 10% as measured by ASTM D3574-11 at an isocyanate index of at least 100.
12 more elements
A process of preparing a flexible polyurethane foam comprising:
- (A) reacting:
- (1) toluene diisocyanate;
- with
- (2) an isocyanate-reactive component comprising:
- (a) from 70 to 95% by weight, based on 100% by weight of component (a) and component (b), of an in-situ formed polyol blend having a hydroxyl number of from about 56 mg KOH/g polyol to about 250 mg KOH/g polyol, an average functionality greater than about 2 and comprising:
- (i) from 25 to 75% by weight, based on 100% by weight of (i) and (ii), of a polyether monol having a hydroxyl number of less than 56 mg KOH/g polyol, and containing less than 20% by weight of copolymerized oxyethylene, based on 100% by weight of (a)(i),
- and
- (ii) from 25 to 75% by weight, based on 100% by weight of (i) and (ii), of a polyether polyol having a hydroxyl number of about 47 mg KOH/g polyol to about 300 mg KOH/g polyol, an average functionality of greater than 2 to about 6, and containing from about 5 to about 45% by weight of copolymerized oxyethylene, based on 100% by weight of (a)(ii);
- and
- (b) from 5 to 30% by weight, based on 100% by weight of component (a) and component (b), of a filled polyol;
- in the presence of
- (3) a blowing agent;
- (4) a catalyst;
- and
- (5) a surfactant;
- wherein the resultant foam has a 90% compression set of less than or equal to 10% as measured by ASTM D3574-11 at an isocyanate index of at least 100.
13 more elements
Dependencies are inferred from the claim text.