Water-tree stable electrical insulating polymeric compositions
First Claim
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1. An electrical wire or cable comprising an electrical conductor and insulation comprising a polymeric component and a water tree retardant additive wherein the water tree retardant additive is selected from the group consisting of:
- (A) an organo orthoborate or partial ester of boric acid having the general formula;
space="preserve" listing-type="equation">B (OR) (OR.sup.1) (OR.sup.2) in which R is an alkyl, aryl, aralkyl, alkaryl or cycloalkyl group having from 4 to 24 carbon atoms and R1 and R2 are individually hydrogen or an alkyl, aryl, aralkyl, alkaryl or cycloalkyl group having from 4 to 24 carbon atoms and(B) an organo orthoborate or partial ester of boric acid with a polyhydric hydrocarbyl alcohol.
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Abstract
A composition suitable for use as an electrical insulation comprises a polymeric component and a water-tree retardant additive which is either an organo orthoborate of partial ester of boric acid having the formula B(OR) (OR1) (OR2) or an organo orthoborate or partial ester of boric acid with a polyhydric hydrocarbyl alcohol.
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17 Claims
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1. An electrical wire or cable comprising an electrical conductor and insulation comprising a polymeric component and a water tree retardant additive wherein the water tree retardant additive is selected from the group consisting of:
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(A) an organo orthoborate or partial ester of boric acid having the general formula;
space="preserve" listing-type="equation">B (OR) (OR.sup.1) (OR.sup.2)in which R is an alkyl, aryl, aralkyl, alkaryl or cycloalkyl group having from 4 to 24 carbon atoms and R1 and R2 are individually hydrogen or an alkyl, aryl, aralkyl, alkaryl or cycloalkyl group having from 4 to 24 carbon atoms and (B) an organo orthoborate or partial ester of boric acid with a polyhydric hydrocarbyl alcohol. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A process for improving resistance to the initiation and/or growth of water trees in a polymeric composition used as electrical insulation which comprises insulating an electrical conductor with a polymeric composition comprising a polymeric component and a water tree retardant additive wherein the water tree retardant is selected from the group consisting of:
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(A) an organo orthoborate or partial ester of boric acid having the general formula;
space="preserve" listing-type="equation">B (OR) (OR.sup.1) (OR.sup.2)in which R is an alkyl, aryl, aralkyl, alkaryl or cycloalkyl group having from 4 to 24 carbon atoms and R1 and R2 are individually hydrogen or an alkyl, aryl, aralkyl, alkaryl or cycloalkyl group having from 4 to 24 carbon atoms and (B) an organo orthoborate or partial ester of boric acid with a polyhydric hydrocarbyl alcohol. - View Dependent Claims (16)
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17. A polymeric composition suitable for use as electrical insulation, comprising:
- a polymeric component which comprises a blend of ethylene-ethyl acrylate copolymer with low density polyethylene in which the total ethyl acrylate content is from 0.5 to 5% by weight, and a water tree retardant additive which is an organo orthoborate or partial ester of boric acid with a polyhydric hydrocarbyl alcohol.
Specification