Patents Assigned to Montefina S.A.

Thermoplastic rubber consisting of a mixture of polypropylene, high-impact polystyrene and a styrene/diene block copolymer

Patent number: 4556691

Abstract: Synthetic thermoplastic rubber consisting of a mixture containing from 10% to 45% by weight of polypropylene, from 10% to 45% by weight of high-impact polystyrene and from 30% to 80% by weight of elastomeric copolymer of the linear type, of styrene/diene blocks whose diene is either butadiene or isoprene, having at least three polymeric sequences and a content in styrene lower than 50% by weight.

Type: Grant

Filed: February 14, 1984

Date of Patent: December 3, 1985

Assignee: Montefina S.A.

Inventor: Jean Castelein
Polymeric material consisting of a mixture of high-impact polystyrene, high-density polyethylene and a styrene/diene block copolymer

Patent number: 4548988

Abstract: Thermoplastic material of high impact resistance, consisting of a homogeneous mixture of high-density polyethylene, high-impact polystyrene and of a styrene/diene block copolymer having a content in styrene below 50% by weight.

Type: Grant

Filed: August 31, 1983

Date of Patent: October 22, 1985

Assignee: Montefina S.A.

Inventor: Jean Castelein
Co-extruded laminate consisting of at least one sheet of polypropylene and at least one sheet of polymeric material based on high-impact polystyrene

Patent number: 4464439

Abstract: Thermoplastic laminate suited for thermo-forming, consisting of at least one sheet of crystalline polypropylene and of at least one sheet of polymeric material consisting of a mixture of high-impact polystyrene (from 1% to 75% by weight), crystalline polypropylene (from 20% to 85% by weight) and of styrene/dienic monomer block copolymer with three or more sequences (from 5% to 15% by weight).

Type: Grant

Filed: March 10, 1982

Date of Patent: August 7, 1984

Assignee: Montefina S.A.

Inventor: Jean Castelein

Thermoplastic rubber consisting of a mixture of polypropylene, high-impact polystyrene and a styrene/diene block copolymer

Polymeric material consisting of a mixture of high-impact polystyrene, high-density polyethylene and a styrene/diene block copolymer

Co-extruded laminate consisting of at least one sheet of polypropylene and at least one sheet of polymeric material based on high-impact polystyrene