US4845146A — Flame-retardant olefin polymer composition

Claim 1

Independent Claim 136 words

A flame-retardant olefin polymer composition containing 100 parts by weight of a resin component, said resin component consisting essentially of the following (a) and (b): (a) 60-99% by weight of a copolymer of ethylene and a carboxyl-containing monomer or derivative thereof and (b) 1-40% by weight of a modified olefin polymer obtained by reacting under heat conditions an ethylene homopolymer having a density of 0.88 to 0.97 g/cm 3 or an ethylene-α-olefin copolymer having a density of 0.88 to 0.97 g/cm 3 with a compound selected from the group consisting of an unsaturated carboxylic acid, an anhydride of an unsaturated carboxylic acid and an ester of an unsaturated carboxylic acid in the presence of an organic peroxide in the absence of an inorganic flame retardant; and (c) 20-200 parts by weight of an inorganic flame retardant.

Claim 2

Dependent Claim 136 words

A flame-retardant olefin polymer composition containing 100 parts by weight of a resin component, said resin component consisting essentially of the following (a) and (b): (a) 60-99% by weight of a copolymer of ethylene and a carboxyl-containing monomer or derivative thereof and (b) 1-40% by weight of a modified olefin polymer obtained by reacting under heat conditions an ethylene homopolymer having a density of 0.88 to 0.97 g/cm 3 or an ethylene-α-olefin copolymer having a density of 0.88 to 0.97 g/cm 3 with a compound selected from the group consisting of an unsaturated carboxylic acid, an anhydride of an unsaturated carboxylic acid and an ester of an unsaturated carboxylic acid in the presence of an organic peroxide in the absence of an inorganic flame retardant; and (c) 20-200 parts by weight of an inorganic flame retardant.

Claim 3

Dependent Claim 71 words

A flame-retardant olefin polymer composition as set forth in claim 1, further containing: (d) an organic flame retardant which is a halogen-based compound and a flame retarding aid which is antimony trioxide or antimony pentoxide, said organic flame retardant and said flame retarding aid being used in the range from 5:1 to 1:3 in terms of weight ratio and the total amount of both being up to 100 parts by weight.

Claim 4

Dependent Claim 25 words

A flame-retardant olefin polymer composition as set forth in claim 1, wherein the component (a) is an ethylene-vinyl acetate copolymer or an ethylene-ethyl acrylate copolymer.

Claim 5

Dependent Claim 48 words

A flame-retardant olefin polymer composition as set forth in claim 3, wherein said ethylene-vinyl acetate copolymer or ethylene-ethyl acrylate copolymer has a melt index of 0.1 to 10 g/10 min and has a vinyl acetate or ethyl acrylate content in the range from 5 to 30% by weight.

Claim 6

Dependent Claim 62 words

A flame-retardant olefin polymer composition as set forth in claim 1, wherein said compound selected from the group consisting of an unsaturated carboxylic acid, an anhydride of an unsaturated carboxylic acid and an ester of an unsaturated carboxylic acid is added in an amount of 0.05 to 10% by weight based on the weight of the olefin polymer as the component (b).

Claim 7

Dependent Claim 46 words

A flame-retardant olefin polymer composition as set forth in claim 6, wherein said compound selected from the group consisting of an unsaturated carboxylic acid, an anhydride of an unsaturated carboxylic acid and an ester of an unsaturated carboxylic acid in the component (b) is maleic anhydride.

Claim 8

Dependent Claim 23 words

A flame-retardant olefin polymer composition as set forth in claim 1, wherein the component (c) is a hydrate of an inorganic metallic compound.

Claim 9

Dependent Claim 23 words

A flame-retardant olefin polymer composition as set forth in claim 7, wherein said inorganic metallic compound hydrate is aluminum hydroxide and/or magnesium hydroxide.

Claim 10

Dependent Claim 145 words

An electrical insulator or sheath, said electrical insulator or sheath comprising a flame-retardant olefin polymer composition containing 100 parts by weight of a resin component consisting essentially of the following (a) and (b): (a) 60-99% by weight of a copolymer of ethylene and a carboxyl-containing monomer or a derivative thereof and (b) 1-40% by weight of a modified olefin polymer obtained by reacting under heat conditions an ethylene homopolymer having a density of 0.88 to 0.97 g/cm 3 or an ethylene-α-olefin copolymer having a density of 0.88 to 0.97 g/cm 3 with a compound selected from the group consisting of an unsaturated carboxylic acid, an anhydride of an unsaturated carboxylic acid and an ester of an unsaturated carboxylic acid in the presence of an organic peroxide in the absence of an inorganic flame retardant; and (c) 20-200 parts by weight of an inorganic flame retardant.

Claim 11

Dependent Claim 145 words

An electrical insulator or sheath, said electrical insulator or sheath comprising a flame-retardant olefin polymer composition containing 100 parts by weight of a resin component consisting essentially of the following (a) and (b): (a) 60-99% by weight of a copolymer of ethylene and a carboxyl-containing monomer or a derivative thereof and (b) 1-40% by weight of a modified olefin polymer obtained by reacting under heat conditions an ethylene homopolymer having a density of 0.88 to 0.97 g/cm 3 or an ethylene-α-olefin copolymer having a density of 0.88 to 0.97 g/cm 3 with a compound selected from the group consisting of an unsaturated carboxylic acid, an anhydride of an unsaturated carboxylic acid and an ester of an unsaturated carboxylic acid in the presence of an organic peroxide in the absence of an inorganic flame retardant; and (c) 20-200 parts by weight of an inorganic flame retardant.

Claim 12

Dependent Claim 71 words

An electrical insulator or sheath as set forth in claim 10, further containing: (d) an organic flame retardant which is a halogen-based compound and a flame retarding aid which is antimony trioxide or antimony pentoxide, said organic flame retardant and said flame retarding aid being used in the range from 5:1 to 1:3 in terms of weight ratio and the total amount of both being up to 100 parts by weight.

Claim 13

Dependent Claim 25 words

An electrical insulator or sheath as set forth in claim 10, wherein the component (a) is an ethylene-vinyl acetate copolymer or an ethylene-ethyl acrylate copolymer.

Claim 14

Dependent Claim 48 words

An electrical insulator or sheath as set forth in claim 12, wherein said ethylene-vinyl acetate copolymer or ethylene-ethyl acrylate copolymer has a melt index of 0.1 to 10 g/10 min and has a vinyl acetate or ethyl acrylate content in the range from 5 to 30% by weight.

Claim 15

Dependent Claim 62 words

An electrical insulator or sheath as set forth in claim 9, wherein said compound selected from the group consisting of an unsaturated carboxylic acid, an anhydride of an unsaturated carboxylic acid and an ester of an unsaturated carboxylic acid is added in an amount of 0.05 to 10% by weight based on the weight of the olefin polymer as the component (b).

Claim 16

Dependent Claim 46 words

An electrical insulator or sheath as set forth in claim 13, wherein said compound selected from the group consisting of an unsaturated carboxylic acid, an anhydride of an unsaturated carboxylic acid and an ester of an unsaturated carboxylic acid in the compound (b) is maleic anhydride.

Claim 17

Dependent Claim 23 words

An electrical insulator or sheath as set forth in claim 9, wherein the component, (c) is a hydrate of an inorganic metallic compound.

Claim 18

Dependent Claim 31 words

An electrical insulator or sheath as set forth in claim 15, wherein said inorganic metallic compound hydrate is selected from the group consisting of aluminum hydroxide, magnesium hydroxide and mixtures thereof.

Claim 19

Dependent Claim 27 words

An electrical insulator or sheath as set forth in claim 9, said electrical insulator or sheath being an insulator or sheath for electric wire or power cable.

Claim 20

Dependent Claim 39 words

An electrical insulator or sheath as set forth in claim 9, said electrical insulator or sheath being an electrical insulation protector selected from the group consisting of insulating plastic sheet, insulation coating, cable protecting cover, packing and protective pipe.

Claim 21

Independent Claim 145 words

A method of preparing a flame retardant olefin polymer composition, said method comprising blending a 100 parts by weight of a resin component, said resin component consisting essentially of the following (a) and (b): (a) 60-99% by weight of a copolymer of ethylene and carboxyl-containing monomer or a derivative thereof and (b) 1-40% by weight of a modified olefin polymer obtained by reacting under heat conditions an ethylene homopolymer having a density of 0.88 to 0.97 g/cm 2 or an ethylene-α-olefin copolymer having a density of 0.88 to 0.97 g/cm 2 with a compound selected from the group consisting of an unsaturated carboxylic acid, an anhydride of an unsaturated carboxylic acid and an ester of an unsaturated carboxylic acid in the presence of an organic peroxide in the absence of an inorganic flame retardant; with (c) 20-200 parts by weight of an inorganic flame retardant.

Claim 22

Independent Claim 145 words

A method of preparing a flame retardant olefin polymer composition, said method comprising blending a 100 parts by weight of a resin component, said resin component consisting essentially of the following (a) and (b): (a) 60-99% by weight of a copolymer of ethylene and carboxyl-containing monomer or a derivative thereof and (b) 1-40% by weight of a modified olefin polymer obtained by reacting under heat conditions an ethylene homopolymer having a density of 0.88 to 0.97 g/cm 2 or an ethylene-α-olefin copolymer having a density of 0.88 to 0.97 g/cm 2 with a compound selected from the group consisting of an unsaturated carboxylic acid, an anhydride of an unsaturated carboxylic acid and an ester of an unsaturated carboxylic acid in the presence of an organic peroxide in the absence of an inorganic flame retardant; with (c) 20-200 parts by weight of an inorganic flame retardant.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1992-07-03	1993-01-02	1993-07-04	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1996-07-03	1997-01-02	1997-07-04	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2000-07-03	2001-01-02	2001-07-04	$7700.00	Window Closed / Lapsed

Flame-retardant olefin polymer composition

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