The Dow Chemical Company

Bruce L Burton

Jimmy D Earls

George A Doorakian

Paul M Puckett

Douglas L Hunter

Brenda Thies Colegrove

A compound of the formula: ##STR1## wherein Ar.sup.1 is the backbone of any aromatic diamine moiety other than 3,4'-oxydianiline and W independently in each occurrence is a bond or a radical selected from the group consisting of: ##STR2##

Resins containing phenylethynl-terminated compounds

An improved tackifier for making tackified substrates contains: (a) at least one epoxy resin, and (b) at least one curing agent for the epoxy resin, but (c) no catalytic amount of catalyst for the reaction between the epoxy resin and the curing agent. The tackified substrates are used to make composites by: (1) placing one or more of the tackified substrates in a mold; (2) injecting into the mold a matrix resin formulation which is chemically-similar to the tackifier, except that it contains a catalytic amount of catalyst for the reaction between the epoxy resin and the curing agent; and (3) curing the matrix resin formulation. The tackifiers are more storage-stable than similar tackifiers which contain catalyst, and the resulting composites have and/or retain physical properties better than composites made using tackifiers without curing agent.

Process for resin transfer molding and formulations useful to practice it

Curable polymeric products are the reaction product of a polymer containing secondary hydroxyl groups and an aliphatic unsaturated isocyanate.

Urethane modified polymers having hydroxyl groups

Blocked isocyanates are deblocked by heating in the presence of an organo phosphorus-containing compound.

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Lake Jackson, TX, United States of America

Bruce L Burton