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US 4,397,981 AGranted
Ethylene polymer compositions that are flame retardant
AssigneeMitsubishi Petrochemical Co., Ltd.
InventorsShuhei Doi, Tsutomu Isaka
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Abstract
A novel flame-retardant ethylene polymer composition comprising a copolymer consisting essentially of ethylene and an olefinically unsaturated silane compound such as vinyltriethoxysilane, a silanol condensation catalyst such as dibutyltin dilaurate, and a flame retardant such as a chlorinated polyethylene.
Claims9
An ethylene polymer composition which comprises:
- (a) 100 parts by weight of a copolymer comprising, as predominant monomeric units ethylene and about 0.01 to 5% by weight based on the weight of the copolymer of an olefinically unsaturated silane compound represented by the formula,
- RSiR.sub.n 'Y.sub.3-n
- wherein:
- R is an ethylenically unsaturated hydrocarbyl or hydrocarbyloxy group;
- R' is an aliphatic saturated hydrocarbyl group;
- Y is a hydrolyzable organic group;
- and n is 0, 1 or 2, said copolymer being obtained by radical copolymerization of said monomeric ethylene and said silane compound in the presence of a radical initiator under elevated pressure,
- (b) 0.001 to 10 parts by weight of a silanol condensation catalyst, and
- (c) 10 to 150 parts by weight of a flame retardant which is an organic halogen compound wherein the halogen is chlorine, bromine or iodine.
6 more elements
A method for producing a flame-retardant ethylene polymer composition comprising
- copolymerizing ethylene with an unsaturated silane monomer of the formula
- RSiR.sub.n 'Y.sub.3-n
- wherein:
- R is an ethylenically unsaturated hydrocarbyl or hydrocarbyloxy group;
- R' is an aliphatic saturated hydrocarbyl group;
- Y is a hydrolyzable organic group;
- and n is 0, 1 or 2 at a pressure of about 500 to 4,000 kg./cm., at temperature of about 100.degree. to 400.degree. C., in the presence of a radical polymerization initiator and in proportions such that the resultant polymer contains about 0.01 to 5% by weight of said silane monomer;
- adding to 100 parts by weight of the resultant copolymer 0.001 to 10 parts by weight of a silanol condensation catalyst and 10 to 150 parts by weight of a flame-retardant which is an organic halogen compound wherein the halogen is chlorine, bromine or iodine;
- molding the copolymer composition and exposing the copolymer composition to water to effect a crosslinking reaction during or after the molding of said copolymer composition.
6 more elements
Dependencies are inferred from the claim text.