The Dow Chemical Company

Jerram B Nichols

Debkumar Bhattacharjee

Douglas L Hunter

Ronald M Herrington

Vaughn M Nace

John F Serratelli

Warren A Kaplan

Ricardo DeGenova

David G Carey

Hans R Friedli

Stephen R Burks

Ricardo De Genova

Polyurethane, polyisocyanurate and polyurea polymers, particularly foamed polymers can be prepared from formulations including non-silicone polyether surfactants. The non-silicone polyether surfactants can be polyethers having from about 10 to about 90 weight percent oxyethylene units and from about 10 to about 90 weight percent oxyalkylene units having at least 4 carbons. The non-silicone polyether surfactants can be used to prepare foams having properties substantially similar to foams prepared with conventional silicone based surfactants.

Polyisocyanate based polymers prepare from formulations including

Polyisocyanate based polymers perpared from formulations including

Flexible polyurethane foams prepared from formulations requiring reduced amounts of chlorofluorocarbon blowing agents are disclosed. The foams can be prepared without undesirable loss of physical properties with formulations comprising an 'A' component which is a blend of a polymethylene polydiphenyldiisccyanate and a methylene diphenyldiisocyanate prepolymer wherein the methylene diphenyldiisocyanate prepolymer is prepared from a prepolymer formulation containing an active hydrogen containing compound which has an equivalent weight of about 30 to about 600; a 'B' component which includes an active hydrogen containing compound; and a carbon dioxide generating blowing agent. Also disclosed are polyisocyanate blends consisting of polymethylene polydiphenyldiisocyanate and methylene diphenyldiisocyanate prepolymers useful for preparing flexible polyurethane foams. Methods of preparing both the foams and the polyisocyanate blends are also disclosed. The foams of the present invention can be prepared to have improved tensile and tear values. Formulations of the present invention also display advantageously improved processing characteristics such as flowability.

Composition of flexible polyurethane foams blown using reduced amounts

Flexible polyurethane foams prepared from formulations requiring reduced amounts of chlorofluorocarbon blowing agents are disclosed. The foams can be prepared without undesirable loss of physical properties with formulations comprising an 'A' component which is a blend of a polymethylene polydiphenyldiisocyanate and a methylene diphenyldiisocyanate prepolymer wherein the methylene diphenyldiisocyanate prepolymer is prepared from a prepolymer formulation containing an active hydrogen containing compound which has an equivalent weight of about 30 to about 600; a 'B' component which includes an active hydrogen containing compound; and a carbon dioxide generating blowing agent. Also disclosed are polyisocyanate blends consisting of polymethylene polydiphenyldiisocyanate and methylene diphenyldiisocyanate prepolymers useful for preparing flexible polyurethane foams. Methods of preparing both the foams and the polyisocyanate blends are also disclosed. The foams of the present invention can be prepared to have improved tensile and tear values. Formulations of the present invention also display advantageously improved processing characteristics such as flowability.

Composition of flexible polyurethane foams blown using reduced amouns of

Flexible polyurethane foams prepared from formulations requiring reduced amounts of chlorofluoro-carbon blowing agents are disclosed. The foams can be prepared without undesirable loss of physical properties with formulations comprising an 'A' component which is a blend of a polymethylene polydiphenyldiisocyanate and a methylene diphenyldiisocyanate prepolymer wherein the methylene diphenyldiisocyanate prepolymer is prepared from a prepolymer formulation containing an active hydrogen containing compound which has an equivalent weight of about 30 to about 600; a 'B' component which includes an active hydrogen containing compound; and a carbon dioxide generating blowing agent. Also disclosed are polyisocyanate blends consisting of polymethylene polydiphenyldiisocyanate and methylene diphenyldiisocyanate prepolymers useful for preparing flexible polyurethane foams. Methods of preparing both the foams and the polyisocyanate blends are also disclosed. The foams of the present invention can be prepared to have improved tensile and tear values. Formulations of the present invention also display advantageously improved processing characteristics such as flowability.

Composition of flexible polyurethane foams below using reduced amounts

Flexible polyurethane foams are prepared using certain high molecular weight, high functionality poly(oxyethylene) compounds as cell openers and softeners. These high functionality polyether polyols have been found to be very effective in opening the cells of the foam, even when used in making foams based on PIPA polyols, which are notoriously closed-celled. They are also quite effective in softening foams made using MDI-based polyisocyanates.

Polyurethane foam prepared using high functionality cell openers

Polyurethane foam prepared using high functionalilty cell openers

This invention is an active hydrogen-containing composition suitable for the production of flexible polyurethane foam when reacted with a polyisocyanate, said composition comprising,

Flexible polyurethane foams which exhibit excellent flame resistance

Polyurethane foams are prepared by reacting a polyisocyanate and a polyahl in the presence of water and a dialkanol tertiary amine. The foams are rigid, useful for thermal insulation in roofs, walls, refrigerators, etc., and are capable of filling mold space completely on foaming (good flowability) without shrinking excessively.

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Alvin, TX, United States of America

Jerram B Nichols