The Dow Chemical Company

Gerald C Kolb

James W Lalk

Donald A Tomalia

James M Renga

Gene D Rose

Dwight K Hoffman

James P Godschalx

Muthiah N Inbasekaran

Peter W Owen

Thomas W Regulski

Daniel M Scheck

Stoil Dirlikov

Yasemin Ersun-Hallsby

Robert J De Koch

A thixoropic adhesive composition exhibiing good sag resistance is prepared comprising a mixture of a polymer-modified epoxy resin and a rheological control agent. The polymer-modified epoxy resin is preferably a dispersion of acrylic elastomer in an epoxy resin in which the acrylic elastomer particles have added hydroxyl functionality which interacts favorably with rheological control agents, such as fumed silica. Acrylic epoxy resin dispersions containing added hydroxyl functionality give improved rheological control.

Acrylic-modified epoxy resin adhesive compositions with improved

This invention relates to a solvent process for the conversion of aromatic propargyl ethers into chromenes. The process can be catalyzed with copper or zinc salts. The preferred salt is cuprous chloride. The most preferred solvent is a dichlorobenzene. The invention also relates to chromene products formed using the process and to the polymerization of that chromene product and its polymerized product, the latter product having substantially improved flexural modulus and flexural strength properties. The polymerized product is also moisture insensitive.

Polymer resulting from the cure of a preformed chromene-containing

Novel cyclic diacetal-alcohols having cycloaliphatic bridging groups.

Cyclic acetal-alcohols

Vicinal epoxides are prepared by decomposition of .beta.-haloalkyl carbonates or bis(.beta.-haloalkyl) carbonates in the presence of a complex of an alkali metal halide and a monomeric or polymeric chelating agent comprising an element of group V of the Periodic Table at a temperature from about 25.degree. C. to about 250.degree. C.

Process for making vicinal epoxides

Method for preparing 2-alkenyl-2-oxazolines

A novel process is disclosed for increasing the amount of grafted polymer formed during the production of polyamide-modified macroporous polystyrene/divinylbenzene cross-linked beads. Greater selectivity for oxazolination and/or oxazination (grafting) of the chloromethylated polystyrene (CMPS) beads over homopolymer formation is achieved by forming an iodized cross-linked vinyl-addition polymer which is then contacted with an excess of oxazoline or oxazine until up to about 50 percent of said oxazoline or oxazine monomer is reacted. Subsequent hydrolysis of these polyamide-modified resins produces polyamine anion-exchange resins which exhibit greater than 2 times the weak base capacities of conventional anion-exchange resins.

Process for the manufacture of oxazoline and/or oxazine-modified

Growing community of inventors

Bay City, MI, United States of America

Gerald C Kolb