Bayer Corporation

Miles Inc.

Bayer Polymers LLC

Scott A Kane

Herman P Doerge

Joachim Werner

Eric F Boonstra

Charles E Mortimer

James W Rosthauser

Stephen D Seneker

William E Slack

Karl W Haider

Robert P Yeater

Jerry E Tracy

The present invention relates to a process for the preparation of rigid foams comprising reacting a polyisocyanate component with an isocyanate-reactive component in the present of a blowing agent. Suitable isocyanate-reactive components for the presently claimed invention comprises polyether polyols having an OH number of from 200 to 800 and containing from 3 to 8 hydroxyl groups wherein the level of alkalinity present in the polyether polyol is equivalent to a hydroxide ion level of from about 0.006% to about 0.21% by weight.

Process for the production of rigid foams from alkaline polyether polyols

Azeotropic compositions made up of (a) from about 26 to about 72% by weight perfluorohexane and (b) one compound selected from (1) about 36 to about 74% by weight 2-methyl butane or (2) about 28 to about 53% by weight n-pentane in which the sum of the weight percent (a) and weight percent (b) is 100 percent may be used as blowing agents in the production of polyurethane/polyurea foams.

Azeotropic compositions of perfluorohexane and hydrocarbons having 5 carbon atoms and the use thereof in the production of foams

Azeotropic compositions made up of (a) from about 4 to about 50% by weight 1,3-dioxolane and (b) one compound selected from (1) about 75 to about 96% by weight cyclopentane, (2) about 60 to about 79% by weight 2-methyl pentane, (3) about 59 to about 77% by weight 3-methyl pentane, and (4) about 50 to about 69% by weight n-hexane in which the sum of the weight percent of (a) plus weight percent of (b) is approximately 100 percent are used as blowing agents in the production of polyurethane/polyurea foams.

Azeotropic compositions of 1,3-dioxolane and hydrocarbons having 5 or 6 carbon atoms and the use thereof in the production of foams

Azeotropic compositions made up of from about 60 to about 78% by weight of 1,1,1,3,3-pentafluoropropane and from about 22 to about 40% by weight of tetramethylsilane have been found to be particularly useful as blowing agents for the production of polyurethane foams.

Azeotrope-like compositions of 1,1,1,3,3-pentafluoropropane and

TDI residue-based urethane-filled isocyanate compositions are produced by reacting a TDI residue satisfying specified criteria with a monofunctional alcohol in amounts such that the equivalent ratio of isocyanate groups to hydroxyl groups is from about 0.9:1 to about 1:0.9. This reaction product is then dissolved in a diisocyanate or polyisocyanate before, during or after reaction of that product with an epoxide having an epoxide equivalent weight of from about 44 to about 400 at a temperature of up to 120.degree. C. These TDI residue-based urethane-filled isocyanate compositions are particularly useful in the production of polyurethanes.

Toluene diisocyanate residue-based compositions having reduced acid

Azeotropic compositions made up of from about 68.1 to about 69.1% by weight of dimethoxymethane, from about 29.7 to about 30.7% by weight of cyclopentane and from about 0.7 to about 1.7% by weight in which the sum of the weight percents of the components is 100% by weight. These azeotrope-like compositions are useful as blowing agents in the production of polyurethane foams.

Azeotrope-like compositions of dimethoxymethane, cyclopentane and

Azeotrope-like compositions of 1,1,1,3,3 pentafluoropropane and

An azeotropic composition made up of from about 58 to about 77% by weight of dimethoxymethane and from about 23 to about 42% by weight of cyclopentane is used as a blowing agent in a process for the production of polyurethane foams.

Azeotropic compositions of dimethoxymethane and cyclopentane and the use

Azeotropic compositions made up of (a) from about 73 to about 88% by weight perfluorohexane and (b) one compound selected from (1) about 14 to about 27% by weight 2-methyl pentane or (2) about 13 to about 25% by weight 3-methyl pentane or (3) about 12 to about 23% by weight, provided that the sum of the weight percent (a) plus weight percent (b) is 100 percent are suitable blowing agents for the production of foams.

Azeotropic compositions of perfluorohexane and hydrocarbons having 6

An azeotropic composition made up of from about 73 to about 87% by weight of 1,1,1,4,4,4-hexafluorobutane and from about 13 to about 27% by weight of n-pentane is used as a blowing agent in a process for the production of polyurethane foams.

Azeotropic compositions of 1,1,1,4,4,4-hexafuorobutane and n-pentane and

Azeotropic compositions made up of from about 65 to about 81% by weight of 1,1,1,3,3-pentafluoropropane and from about 19 to about 35% by weight of 2-methyl butane have been found to be particularly useful as blowing agents for the production of polyurethane foams.

Azeotrope-like compositions of 1,1,1,3,3-pentafluoropropane and 2-methyl

Azeotropic compositions made up of from about 64 to about 80% by weight of 1,1,1,4,4,4-hexafluorobutane and from about 20 to about 36% by weight of 2-methyl butane have been found to be particularly useful as blowing agents for the production of polyurethane foams.

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Wellsburg, WV, United States of America

Scott A Kane