The Dow Chemical Company

Gerald K McEwen

Donald L Schmidt

Violete L Stevens

Lowell S Thomas

George J Atchison

David G Hunt

John G Green

Novel phosphonic acid-containing compounds such as (2-(4-ethylphenyl)ethenyl)-phosphonic acid and esters thereof are disclosed. A method preparation of the phosphonic acids comprising contacting a diethylenically unsaturated aromatic compound and phosphorus pentachloride in the present of sulfur dioxide is also disclosed. The compounds of this invention are useful as monomers for the preparation of polymers having enhanced anti-corrosive properties.

Novel phosphonic acid compounds and method of preparation

Novel phosphonic acid-containing compounds such as (2-(4-ethenylphenyl)ethenyl)-phosphonic acid and esters thereof are disclosed. A method of preparation of the phosphonic acids comprising contacting a diethylenically unsaturated aromatic compound and phosphorus pentachloride in the presence of sulfur dioxide is also disclosed. The compounds of this invention are useful as monomers for the preparation of polymers having enhanced anti-corrosive properties.

A highly adherent photopolymerizable composition comprises a (hydroxy)phosphinylalkyl monomer of the formula ##STR1## wherein R is hydrogen, methyl or ethyl and R' and R' are selected independently from hydrogen and alkyl of 1-10 carbon atoms; at least one copolymerizable ethylenically unsaturated monomer and a photoinitiator.

Adherent photopolymerizable compositions

The invention is (hydroxy)-phosphinylalkyl acrylate, (hydroxy)-phosphinylalkyl methacrylate or an alkali metal, alkaline earth metal or ammonium salt thereof. In another aspect, the invention is a polymeric composition which comprises the reaction product of:

Phosphinyl-containing ethylenically unsaturated compounds

Novel phosphinyl-containing ethylenically unsaturated compounds

A polycarbonate such as a bisphenol-A homopolycarbonate containing a small amount of an aromatic bis(cyclic phosphate) such as 2,2'-[(1-methylethylidene)bis(4,1-phenyleneoxy-2,1-ethanediyloxy)]bis(5,5- dimethyl-2,2'-dioxo-1,3,2-dioxaphosphorinane) exhibits improved thermal stability.

Polycarbonate containing a bis(cyclic phosphate) as a thermal stabilizer

Phosphorus containing polymers are prepared by copolymerizing a cyclic phosphite and an epoxide in the presence of an acid catalyst. The resulting polymer can be incorporated within a thermoplastic or thermosettable resin to increase the flame resistivity thereof.

Polymeric phosphonates of a cyclic phosphite and epoxide

Effective radiation curable flame retardant compositions include compounds of the formula: ##STR1## wherein A is hydrogen or methyl; A' is hydrogen, methyl, phenyl or halogen; n is 1 or 1.5 and when n is 1, B is hydrogen or methyl and when n is 1.5, B is hydrogen; Y is oxygen or sulfur; R and R' are hydrogen, methyl, chloromethyl or bromomethyl.

Radiation curable flame retardant compositions containing

A polycarbonate such as a bisphenol-A homopolycarbonate containing a small amount of an aromatic bis(cyclic phosphite) such as 2,2'---(1-methylethylidene)bis(4,1-phenyleneoxy-2,1-ethanediyloxy)]bis(5,5 -dimethyl-1,3,2-dioxaphosphorinane) exhibits improved processability and thermal stability.

Polycarbonate containing a bis(cyclic phosphite) as a thermal stabilizer

Effective reactive flame retardants are novel compounds of the formula: ##STR1## wherein A is hydrogen or methyl; A' is hydrogen, methyl, phenyl or halogen; n is 1 or 1.5 and when n is 1, B is hydrogen or methyl and when n is 1.5, B is hydrogen; Y is oxygen or sulfur; R and R' are hydrogen, methyl, chloromethyl or bromomethyl.

Growing community of inventors

Midland, MI, United States of America

Gerald K McEwen