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US 2016/0096942 A1Published application
Method of Making a Foam
AssigneeSealed Air Corporation (US)
InventorDrew V Speer
Life of this patent
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Abstract
A method of making a foam uses the following steps. A mixture is created having a polymerizable condensation polymer and a blowing agent. The polymerizable condensation polymer has hydroxy acid units and unsaturated di-functional units. The unsaturated di-functional units are unsaturated dicarboxylic acid units or unsaturated di-alcohol units. The mixture is expanded to create a froth. The polymerizable condensation polymer in the froth is reacted to create the foam.
Claims25
A method of making a foam comprising:
- (1) creating a mixture comprising:
- (i) a polymerizable condensation polymer comprising:
- hydroxy acid units;
- unsaturated di-functional units selected from one or more of unsaturated dicarboxylic acid units and unsaturated di-alcohol units;
- and
- optionally, a branching unit selected from (a) a polyfunctional alcohol unit derived from polyfunctional alcohol having three or more hydroxyl groups or epoxide groups and (b) a multifunctional acid unit derived from multifunctional acids having three or more carboxyl groups;
- and
- (ii) a blowing agent;
- (2) expanding the mixture to create a froth;
- and
- (3) reacting the polymerizable condensation polymer in the froth to create the foam.
8 more elements
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Dependencies are inferred from the claim text.