James J Craven

US Patent:

44029837, Sep 6, 1983

Filed:

Jul 22, 1982

Appl. No.:

6/400950

Inventors:

James M. Craven - Wilmington DE

Assignee:

E. I. Du Pont de Nemours & Co. - Wilmington DE

International Classification:

C08K 534

US Classification:

428335

Abstract:

A thermosetting acrylic powder coating composition contains an acrylic copolymer of a methacrylic acid and at least one other monoethylenically unsaturated monomer, a crosslinking agent capable of reacting with carboxylic acid groups, a blend of an ultraviolet light stabilizer and an ultraviolet screener capable of preventing degradation of the coating by ultraviolet light and a flow control agent. Preferably, the composition is nonpigmented and provides a clear, glossy, and durable film useful as the clear coat of a clear coat/color coat automobile finish.

US Patent:

43461441, Aug 24, 1982

Filed:

Jul 21, 1980

Appl. No.:

6/170868

Inventors:

James M. Craven - Wilmington DE

Assignee:

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

International Classification:

C08L 6308
C08L 6128
C08L 6310

US Classification:

428335

Abstract:

A thermosetting acrylic powder coating composition contains an acrylic copolymer of a monoethylenically unsaturated monomer having at least one epoxy group and at least one monoethylenically unsaturated monomer which is free of epoxy groups, a carboxy-terminated primary crosslinking agent, a supplementary crosslinking agent having at least one functional group which can react with either hydroxyl groups or carboxylic acid groups, and at least one ultraviolet light stabilizer or ultraviolet light screener capable of preventing degradation of the coating by ultraviolet light. An acrylic copolymer of methyl methacrylate, n-butyl methacrylate, and glycidyl methacrylate is favored. Preferably, the composition contains a combination of ultraviolet light stabilizer and ultraviolet light screener, is nonpigmented, and provides a clear, glossy, and durable film useful as the clear coat of a clear coat/color coat automobile finish.

US Patent:

41184360, Oct 3, 1978

Filed:

Jun 30, 1976

Appl. No.:

5/701747

Inventors:

James M. Craven - Wilmington DE

International Classification:

C08L 2334
C08L 6120

US Classification:

260826

Abstract:

An improved adhesive composition of a chlorosulfonated polyethylene, at least one acrylic monomer, such as methyl methacrylate, butyl methacrylate and the like, an amine aldehyde condensation product and optionally a peroxy catalyst in which the improvement comprises the use of a silane of the formula ##STR1## where R. sup. 1, --R. sup. 2, --R. sup. 3 and --R. sup. 4 are --H or an alkyl group having 1-5 carbon atoms, --X is --O--R, --R or --OH where --R is an alkyl group having 1-4 carbon atoms, and Y and Z are --H or a monovalent hydrocarbon-containing radical having 1-20 carbon atoms. The improved adhesive is useful for bonding a wide variety of materials and sets rapidly to form durable bonds that withstand exposure to weathering and high humidity conditions. Usually, the adhesive is applied as a two component system in which a mixture of chlorosulfonated polyethylene and acrylic monomers is applied to one surface to be bonded and a mixture of the amine aldehyde condensation product and the silane is applied to the other surface to be bonded and the two surfaces are brought in abutting relationship to form an adhesive bond.