The Dow Chemical Company

Donald B Parrish

Franciszek Olstowski

Gilbert B Ellerbe, Iii

Raymond E Thomas

Lenore F Oswald

6-chromanol derivatives are used as antioxidants in polyethers. These, particularly in conjunction with other antioxidants, provide excellent protection against oxidation at very low levels of use. They are particularly useful in polyethers for preparing polyurethane slabstock foam.

Polymers stabilized with 6-chromanol derivatives

Polyethers stabilized with 6-chromanol derivatives

Flexible foam is prepared using 1,1,1-trichloroethane as the sole or predominant auxiliary blowing agent.

Flexible polyurethane foam prepared using 1,1,1-trichloroethane as a

Vinyl urethane composite polymers having improved impact strength are prepared by reacting a polymer polyahl containing dispersed soft polymer particles, a polyisocyanate and a vinyl monomer.

Vinyl urethane composite polymer containing dispersed soft copolymer

Fluid compositions containing a polyether polyol having an equivalent weight below about 250, a polyisocyanate, a solid modifier compound having a surface area less than 0.2 m.sup.2 /gram and a particle size of less than 1/4 inch in the minimum dimension and a non-amine containing catalyst rapidly solidifies into a solid, dense polyurethane free of bubbles, distortions and fissures.

Fluid rapid-setting urethane compositions

Polyurethane and vinyl polymer composites are rapidly prepared without the requirement of the application of an external source of heat by the admixture of a composition comprising

Composites of polyurethanes and vinyl polymers

Rapid-setting polyurethanes are prepared employing a mixture consisting of an aliphatic monomeric triol and derivatives of propylene glycol having an equivalent weight of less than about 230 as the polyol component therein.

Non-elastomeric rapid-setting polyurethanes

Mixtures comprising a low molecular weight polyol having a functionality of from 3 to about 8, a liquid modifier compound having a boiling point above 150.degree. C, such as a fatty acid or fatty oil, a polyisocyanate and a non-amine-containing catalyst, instantly set, after a brief induction period, to a solid, dense, non-elastomeric polymeric product which can be demolded within a period of from less than about 1 minute to about 5 minutes.

Non-elastomeric polyurethane compositions

Mixtures comprising a low molecular weight polyol having a functionality of from 3 to about 8, a liquid modifier compound having a boiling point above 150.degree.C, such as an estermodified polyoxyalkylene compound having an average molecular weight above about 700, a polyisocyanate and a non-amine-containing catalyst, instantly set, after a brief induction period, to a solid, dense, non-elastomeric polymeric product which can be demolded within a period of from less than about 1 minute to about 5 minutes.

Preparation of rapid setting non-elastomeric polyurethane compositions

Mixtures comprising a low molecular weight polyol having a functionality of from 3 to about 8, a liquid modifier compound having a boiling point above 150.degree.C, such as an ester-modified polyoxyalkylene compound having an average molecular weight above about 700, a polyisocyanate and a non-amine-containing catalyst, instantly set, after a brief induction period, to a solid, dense, non-elastomeric polymeric product which can be demolded within a period of from less than about 1 minute to about 5 minutes.

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Lake Jackson, TX, United States of America

Donald B Parrish