Surface treating agent as an undercoat on surface of polyolefin

Stock material or miscellaneous articles – Composite – Of polyester

Patent

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Other Related Categories

428483, 428516, 428520, 428521, 428522, 428523, 428413, 4284244, 524531, 524536, 264176R, B32B 2736, C08K 501

Type

Patent

Status

active

Patent number

044618093

Description

ABSTRACT:
A surface treating agent for a shaped article of a polyolefin is provided which is composed of a solution in an organic solvent of a propylene-ethylene copolymer having a monoalkyl ester of a monolefinic dicarboxylic acid, such as monomethyl maleate, grafted thereto. The propylene-ethylene copolymer has a propylene content of 50 to 75 mole %, and a crystallinity, determined by an X-ray diffraction method, of 2 to 20%. The esterification degree of the alkyl ester of the monolefinic dicarboxylic acid is 45 to 100% if the esterification degree is taken as 200% when all of the carboxyl groups of the dicarboxylic acid are esterified. The amount of the monoalkyl ester grafted is 0.5 to 15% by weight. The grafted propylene-ethylene copolymer has an intrinsic viscosity [.eta.] of at least 0.3 and is dissolved in an amount of 10 to 100 kg per cubic meter of the organic solvent. The surface treating agent is suitable as an undercoat for a polyolefin shaped article. It greatly improves the adhesion of a paint to the polyolefin article, and has excellent storage stability.

REFERENCES:
patent: 3970771 (1976-07-01), Davison
patent: 4299754 (1981-11-01), Shiomi et al.
patent: 4350740 (1982-09-01), Coran et al.

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