Stanley W Caywood

US Patent:

RE316806, Sep 18, 1984

Filed:

Jul 1, 1982

Appl. No.:

6/394462

Inventors:

Stanley W. Caywood - Wilmington DE

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

C08F25506

US Classification:

525285

Abstract:

An adduct of maleic anhydride and an elastomeric copolymer of ethylene, at least one C. sub. 3 -C. sub. 6. alpha. -olefin, and at least one nonconjugated diene; the adduct having an inherent viscosity of at least one as measured on 0. 1 gram of adduct dissolved in 100 milliliters of perchloroethylene at 30. degree. C. and having a gel content less than about 5 percent as measured by weight percent adduct insoluble in boiling tetrahydrofuran at atmospheric pressure after 48 hours. Also, a process of making the adduct and thermoplastic elastomers prepared from the adduct.

US Patent:

46633952, May 5, 1987

Filed:

Jul 25, 1985

Appl. No.:

6/758716

Inventors:

Stanley W. Caywood - Wilmington DE

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

C08F 840

US Classification:

525340

Abstract:

A fluoroelastomer composition comprising (a) a fluoroelastomer comprising vinylidene fluoride units and units of at least one other fluorine-containing monomer copolymerizable with vinylidene fluoride, said monomer containing 2-7 carbon atoms and containing at least as many fluorine atoms as carbon atoms, and (b) a phosphonate accelerator for curing the fluoroelastomer having the formula: ##STR1## where R, R. sub. 1 and R. sub. 2 independently represent an alkyl radical of from 1-8 carbon atoms, a phenyl radical, a phenyl radical substituted with an alkyl group of 1-4 carbon atoms or anaralkyl radical having from 7-13 carbon atoms such fluoroelastomer composition substantially reduces mold fouling during curing.

US Patent:

46737154, Jun 16, 1987

Filed:

Aug 27, 1986

Appl. No.:

6/901002

Inventors:

Stanley W. Caywood - Wilmington DE

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

C08F 840

US Classification:

525340

Abstract:

A fluoroelastomer composition comprising (a) a fluoroelastomer comprising vinylidene fluoride units and units of at least one other fluorine-containing monomer copolymerizable with vinylidene fluoride, said monomer containing 2-7 carbon atoms and containing at least as many fluorine atoms as carbon atoms, and (b) a phosphonate accelerator for curing the fluoroelastomer having the formula: ##STR1## where R, R. sub. 1 and R. sub. 2 independently represent an alkyl radical of from 1-8 carbon atoms, a phenyl radical, a phenyl radical substituted with an alkyl group of 1-4 carbon atoms or an aralkyl radical having from 7-13 carbon atoms such fluoroelastomer composition substantially reduces mold fouling during curing.