George M Hopkins

US Patent:

39564223, May 11, 1976

Filed:

Jan 31, 1975

Appl. No.:

5/545942

Inventors:

Akio Takahashi - Amherst NY
Geoffrey H. Smith - North Tonawanda NY
George C. Hopkins - Clarence NY

Assignee:

Hooker Chemicals & Plastics Corporation - Niagara Falls NY

International Classification:

C08L 6706

US Classification:

260873

Abstract:

Polyvinyl halide or polyvinyl halide graft copolymers intimately mixed with a polyester derived mainly from an halogenated bicycloheptene carboxylic acid or anhydride such as chlorendic acid or anhydride and an alkylene glycol or alkylene oxide such as ethylene glycol or ethylene oxide are provided. The graft copolymers of the invention are obtained by polymerizing a vinyl halide in bulk in contact with an olefin polymer. The graft copolymer compositions of the invention have good clarity and provide improved processing characteristics and increased impact strength without reduction in heat distortion resulting from the addition of the polyester. The improved impact strength polyvinyl halide compositions of the invention can include blends of the polyester of the invention with modifying compounds, such as alkyl methacrylate-butadiene/styrene graft polymer impact modifiers and halogenated polyvinyl chloride. Blends of vinyl halide polymers with the polyesters of the invention provide compositions having improved processability. A reduction in melt viscosity and fusion temperature can be obtained in the blends while maintaining or increasing heat distortion temperature.

US Patent:

40368106, Jul 19, 1977

Filed:

Nov 14, 1975

Appl. No.:

5/631966

Inventors:

George C. Hopkins - Clarence NY
D. Bruce Merrifield - Houston TX

Assignee:

Hooker Chemicals & Plastics Corporation - Niagara Falls NY

International Classification:

C08K 532
C08K 511
C08K 509

US Classification:

260 4575W

Abstract:

A polymeric composition containing more than 5% halogen can be improved in heat and light stability by the incorporation therein of small amounts of a novel stabilizer which is the metallic salt of the reaction product of an alpha-olefin with maleic anhydride. The stabilizers of the invention can be used either alone or in combination with conventional stabilizers for halogen containing polymeric materials.

US Patent:

39337715, Jan 20, 1976

Filed:

Jun 24, 1974

Appl. No.:

5/482111

Inventors:

David W. Eastman - Angola NY
Anthony L. Lemper - Tonawanda NY
Victor A. Pattison - Clarence Center NY
George C. Hopkins - Clarence NY
Henry Kahn - Williamsville NY
Jack L. Nickels - Willingboro NJ

Assignee:

Hooker Chemicals & Plastics Corporation - Niagara Falls NY

International Classification:

C08F 330
C08F 1506

US Classification:

260 871

Abstract:

Polyvinyl chloride and polyvinyl chloride containing up to 20 percent of a comonomer can be obtained in the form of small particle size spherical glassy surface particles by a process of bulk polymerization of monomer or monomers comprising two stage polymerization wherein high shear agitation is used during the first stage and low shear agitation is used in the second stage. To obtain a reduction in particle size, the polymerization in the first stage is conducted in contact with at least one of (A) an additive comprising an organic or inorganic, inert, fine particle size material solid at least at reaction temperatures, and insoluble in said monomer or monomers used, and (B) a cationic, anionic, or non-ionic surface active agent. A portion of the polymerization in a second stage reaction is conducted at temperature and pressure sufficient to render the surface of the individual particles or agglomerates glassy and fused. The resulting polymers and copolymers produced have superior plastisol viscosity stability and fusion characteristics and excellent powder flow properties as compared to those of the prior art.

US Patent:

42062918, Jun 3, 1980

Filed:

Mar 12, 1979

Appl. No.:

6/019974

Inventors:

Akio Takahashi - Amherst NY
Geoffrey H. Smith - North Tonawanda NY
George C. Hopkins - Clarence NY

Assignee:

Hooker Chemicals & Plastics Corp. - Niagara Falls NY

International Classification:

C08L 6706

US Classification:

525167

Abstract:

Polyvinyl halide or polyvinyl graft copolymers intimately mixed with a polyester derived mainly from an halogenated bicycloheptene carboxylic acid or anhydride such as chlorendic acid or anhydride and an alkylene glycol or alkylene oxide such as ethylene oxide are provided. The graft copolymers of the invention are obtained by polymerizing a vinyl halide in bulk in contact with an olefin polymer. The graft copolymer compositions of the invention have good clarity and provide improved processing characteristics and increased impact strength without reduction in heat distortion resulting from the addition of the polyester. The improved impact strength polyvinyl halide compositions of the invention can include blends of the polyester of the invention with modifying compounds, such as alkyl methacrylate-butadiene/styrene graft polymer impact modifiers and halogenated polyvinyl chloride. Blends of vinyl halide polymers with the polyesters of the invention provide compositions having improved processability. A reduction in melt viscosity and fusion temperature can be obtained in the blends while maintaining or increasing heat distortion temperature.

US Patent:

39337405, Jan 20, 1976

Filed:

Jan 2, 1974

Appl. No.:

5/430115

Inventors:

George C. Hopkins - Clarence NY
D. Bruce Merrifield - Williamsville NY

Assignee:

Hooker Chemicals & Plastics Corporation - Niagara Falls NY

International Classification:

C08G 600

US Classification:

260 4575W

Abstract:

A polymeric composition containing more than 5% halogen can be improved in heat and light stability by the incorporation therein of small amounts of a novel stabilizer which is the metallic salt of the reaction product of an alpha-olefin with maleic anhydride. The stabilizers of the invention can be used either alone or in combination with conventional stabilizers for halogen containing polymeric materials.

US Patent:

41559517, May 22, 1979

Filed:

Mar 1, 1976

Appl. No.:

5/662622

Inventors:

Akio Takahashi - Amherst NY
Geoffrey H. Smith - North Tonawanda NY
George C. Hopkins - Clarence NY

Assignee:

Hooker Chemicals & Plastics Corp. - Niagara Falls NY

International Classification:

C08L 6706

US Classification:

260869

Abstract:

Polyvinyl halide or polyvinyl halide graft copolymers intimately mixed with a polyester derived mainly from an halogenated bicycloheptene carboxylic acid or anhydride such as chlorendic acid or anhydride and an alkylene glycol or alkylene oxide such as ethylene glycol or ethylene oxide are provided. The graft copolymers of the invention are obtained by polymerizing a vinyl halide in bulk in contact with an olefin polymer. The graft copolymer compositions of the invention have good clarity and provide improved processing characteristics and increased impact strength without reduction in heat distortion resulting from the addition of the polyester. The improved impact strength polyvinyl halide compositions of the invention can include blends of the polyester of the invention with modifying compounds, such as alkyl methacrylate-butadiene/styrene graft polymer impact modifiers and halogenated polyvinyl chloride. Blends of vinyl halide polymers with the polyesters of the invention provide compositions having improved processability. A reduction in melt viscosity and fusion temperature can be obtained in the blends while maintaining or increasing heat distortion temperature.

US Patent:

40555810, Oct 25, 1977

Filed:

Nov 14, 1975

Appl. No.:

5/631967

Inventors:

George C. Hopkins - Clarence NY
D. Bruce Merrifield - Houston TX

Assignee:

Hooker Chemicals & Plastics Corporation - Niagara Falls NY

International Classification:

C07F 306

US Classification:

2604299

Abstract:

A polymeric composition containing more than 5% halogen can be improved in heat and light stability by the incorporation therein of small amounts of a novel stabilizer which is the metallic salt of the reaction product of an alpha-olefin with maleic anhydride. The stabilizers of the invention can be used either alone or in combination with conventional stabilizers for halogen containing polymeric materials.

Author:

George E. Hopkins

ISBN #:

0674012755

Author:

George E. Hopkins

ISBN #:

0896723577

Author:

George E. Hopkins

ISBN #:

0960970800

Author:

George W. Hopkins

ISBN #:

0892522208