ETHYLENE-ETHYL ACRYLATE COPOLYMER WITH HIGH ETHYL ACRYLATE CONTENT AND WITH LOW MELT FLOW RATE, FLAME RETARDANT RESIN COMPOSITION, MOLDED ARTICLE THEREOF AND PREPARATION OF SAID COPOLYMER

摘要

PROBLEM TO BE SOLVED: To obtain a compsn. having excellent filling characteristics and mechanical properties by forming an ethyleneethyl acrylate copolymer in which the ethyl acrylate content lies in a specific range and the content has a specific relationship with the melt mass flow rate. ;SOLUTION: In this ethylene-ethyl acrylate copolymer, the ethyl acrylate content lies in the range of 20.0-30.0 wt.% and the ethyl acrylate content represented by EA (wt.%) and the melt mass flow rate represented by MI ((g/10 min) have a relationship which satisfies the equation: 0.1≤MI0.0494EA-0.141. One hundred pts.wt. of this copolymer is blended with 5-250 pts.wt. of a flame retarder such as magnesium hydroxide with an average particle size of ≤40 μm to form a resin compsn. This copolymer is manufactured by putting a raw material in which ethyl acrylate is 0.5-1.5 mol% of ethylene into a tubular reactor to copolymerize them in the presence of an org. peroxide under a pressure of 230-300 MPa and at an average temp. of 160-190°C with a max. of 200-300°C.;COPYRIGHT: (C)2001,JPO