Thermoplastic compositions of crystalline polyolefin and ethylene-containing copolymer
AssigneeE. I. Du Pont de Nemours and Company
InventorsEdward J. Deyrup, Coretta C. Tam
Life of this patent
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Abstract
A melt processible multi-phase thermoplastic composition comprising a blend of: (A) 5-95 parts by weight of a crystalline polyolefin resin of a substantially saturated homopolymer or copolymer of polymerized monomer units of C.sub.2 -C.sub.8 alpha monoolefins forming one phase of the composition, (B) 5-95 parts by weight of a crosslinked ethylene-containing copolymer forming a second phase of the composition comprising units derived from (1) ethylene, (2) alkyl acrylates or alkyl methacrylates wherein the alkyl group contains 1-6 carbon atoms or vinyl esters of monocarboxylic acids having 2-6 carbon atoms, and (3) glycidyl acrylate or glycidyl methacrylate.
Claims34
A melt processible multi-phase thermoplastic composition comprising a blend of:
- (A) 5-95 parts of weight of a crystalline thermoplastic polyolefin resin of a substantially saturated homopolymer or copolymer of polymerized monomer units of C.sub.2 -C.sub.8 alpha monoolefin forming one phase of the composition, and
- (B) 5-95 parts by weight of a dynamically crosslinked ethylene-containing copolymer forming a second phase of the composition comprising units derived from:
- (1) ethylene, (2) alkyl acrylates or alkyl methacrylates wherein the alkyl group contains 1-6 carbon atoms, or vinyl esters of monocarboxylic acids having 2-6 carbon atoms, and (3) glycidyl acrylate or glycidyl methacrylate, the cross-linking being carried out using one or more epoxy resin cross linking agents.
A melt processible multi-phase thermoplastic composition comprising a blend of a crystalline thermoplastic polyolefin resin and an ethylene-containing copolymer which comprises:
- (a) 25-70 parts by weight of a crystalline thermoplastic polyolefin resin comprising polymerized monomer units of ethylene or propylene forming one phase of the composition, and
- (b) 30-75 parts by weight of a dynamically crosslinked ethylene-containing copolymer forming a second phase of the composition comprising units derived from (1) ethylene, (2) butyl acrylate or vinyl acetate and (3) glycidyl acrylate or glycidyl methacrylate, the cross-linking being carried out using one or more epoxy resin cross linking agents.
A process for making a melt processible multi-phase thermoplastic composition of a blend of a crystalline polyolefin resin and a dynamically crosslinked ethylene-containing copolymer which comprises:
- (1) adding to a mixer
- (A) 5-95 parts by weight of a crystalline polyolefin resin of a substantially saturated homopolymer or copolymer of polymerized monomer units of a C.sub.2 -C.sub.8 alpha monoolefin, and
- (B) 5-95 parts by weight of an uncrosslinked ethylene-containing copolymer comprising units derived from (1) ethylene;
- (2) an alkyl acrylate or alkyl methacrylate wherein the alkyl group contains 1-6 carbon atoms, or vinyl esters of monocarboxylic acids having 2-6 carbon atoms, and (3) glycidyl acrylate or glycidyl methacrylate,
- (C) a crosslinking agent for the ethylene-containing copolymer, and
- (2) mixing and shearing the composition at a temperature sufficient to soften the polyolefin resin and to crosslink and comminute said ethylene-containing copolymer resulting in the crosslinked ethylene-containing copolymer being dispersed as a phase throughout the crystalline polyolefin resin.
A process for making a melt processible thermoplastic composition comprising a blend of a crystalline polyolefin resin and a dynamically crosslinked ethylene-containing copolymer which comprises:
- (1) adding to a mixer
- (A) 25-70 parts by weight of the crystalline polyolefin resin polyethylene, polypropylene or copolymers thereof, and
- (B) 30-75 parts by weight of an uncured elastomer of an ethylene copolymer that consists essentially of units derived from ethylene/butyl acrylate/glycidyl acrylate or glycidyl methacrylate, and
- (C) a crosslinking agent for the ethylene-containing copolymer, and
- (2) mixing and shearing the composition at a temperature sufficient to soften the polyolefin resin and ethylene-containing copolymer and to crosslink and comminute said ethylene-containing copolymer resulting in the crosslinked ethylene-containing copolymer forming a separate phase in the crystalline polyolefin resin.
Dependencies are inferred from the claim text.