The Dow Chemical Company

Dow Global Technolgoies LLC

John P Everett

David J Brennan

Bassam S Nader

Joseph Gan

Jan J Zwinselman

Raymond A Koenig

Alan R Goodson

Karin Wanzl-Dacho

Novel phosphorus element-containing vinyl ester resin compositions and process for preparing epoxy vinyl ester resin compositions include non-halogenated, ignition resistant epoxy vinyl ester resin formulations. The ignition resistant epoxy vinyl ester resin formulations are advantageously used for making laminates for printed wiring boards and composite materials.

Phosphorus element-containing crosslinking agents and flame retardant phosphorus element-containing epoxy resin compositions prepared therewith

Novel phosphorus element-containing epoxy resin compositions and novel phosphorus-element containing epoxy resin compositions based on an isomeric mixture of tris(2-hydroxyphenyl)-phosphine oxide compounds including non-halogenated, ignition resistant epoxy resin formulations. The ignition resistant epoxy resin formulations are advantageously used for making laminates for printed wiring boards and composite materials.

An epoxy resin composition comprises a) a polyepoxide, b) a cure inhibitor of boric acid, a Lewis acid derivative of boron, an alkyl borane, a mineral acid having a nucleophilicity value &ldquo;n&rdquo; of greater than zero and less than 2.5, or an organic acid having a pKa value of 1 or more, a catalyst which can be complexed with the cure inhibitor, and c) more than 30 parts by weight per 100 parts by weight of polyepoxide of a cross-linker such as a polycarboxylic acid or anhydride including a copolymer of an ethylenically unsaturated anhydride and a vinyl compound, or a hydroxy-functional compound such as a copolymer of styrene and hydroxystyrene.

Polyepoxide, catalyst/cure inhibitor complex and anhydride

Novel phosphorus element-containing crosslinking agents for epoxy resin compositions based on an isomeric mixture of tris(2-hydroxyphenyl)-phosphine oxide compounds. Epoxy resins cured or crosslinked with the crosslinking agents of this invention yield non-halogenated, ignition resistant epoxy resin formulations. The ignition resistant epoxy resin formulations are advantageously used for making laminates for printed wiring boards and composite materials.

A flame retardant epoxy resin composition containing not more than 10% by wgt. of halogen, comprising an epoxy resin, stated concentrations of phosphoric acid ester, nitrogen&mdash;containing cross-linking agent having an amine functionality of at least 2 and a catalyst capable of promoting the reaction of the phosphoric acid ester with the epoxy resin and promoting the curing of the epoxy resin with the cross-linker, and optionally a Lewis acid in a stated amount.

Flame retardant epoxy resin composition

An essentially water-free solvent system comprising methoxy acetone and an organic protic solvent is useful as a solvent for

Solvent system

A solvent system contains methoxy acetone, water and, optionally, an oxygen-containing solvent other than methoxy acetone, such as a propylene glycol monoether or diether. The solvent system is a useful solvent for a curing agent for an epoxy resin, a curing catalyst and/or a cure inhibitor. A solution of the curing agent, the curing catalyst and/or the cure inhibitor in the solvent system can be mixed with an epoxy resin, optionally dissolved in a solvent, for producing a one-component epoxy resin composition.

Growing community of inventors

Buehl-Neusatz, Germany

John P Everett