Low monomer foam
OwnerRodney Bicknell, Helen Kirkham +1inventors
InventorsRodney Bicknell, Helen Kirkham, Richard Spencer
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Abstract
A process for producing a two component polyurethane foam, which process comprises mixing (A) a polyol resin component; (B) an isocyanate component having a free monomeric diisocyanate content of not more than 2% by weight; and (C) a catalyst blend comprising at least two catalytic materials selected from (a) organometallic catalysts, (b) amines and (c) isocyanurate catalysts.
Claims10
A process for producing a two component polyurethane foam, which process comprises mixing
- (A) a polyol resin component;
- (B) an isocyanate component having a free monomeric diisocyanate content of not more than 2% by weight;
- and
- (C) a catalyst blend comprising at least two catalytic materials selected from (a) organometallic catalysts,(b) amines and (c) isocyanurate catalysts.
A process according to one of the preceding claims, wherein the catalyst blend comprises an isocyanurate catalyst selected from potassium acetate, potassium octoate, N, N′,N″-tris-(dimethylarminopropyl) hexahydro-s-triazine, bis-(3-dimethylaminopropyl) isopropanolamine, n-(2-hydroxypropyl)-n-trimethylammonium formate and other quaternary ammonium salts and metal salts. and Baxcat 0.
A process according to any one of the preceding claims wherein the polyol resin component (A) and the catalyst blend (C) are mixed with the isocyanate component (B).
A process according to any one of the preceding claims, wherein the isocyanate of component (B) has a free monomeric diisocyanate component of not more than 0.5% by weight.
A process according to any one of the preceding claims, wherein the mixture or the foam is provided into voids in components on a continuous production line or in discontinuous production.
A two component polyurethane foam obtainable by a process according to any one of the preceding claims.
A process for the production of a two component polyurethane foam substantially as hereinbefore described with reference to the Examples.
Dependencies are inferred from the claim text.