Abstract Compounds useful as crosslinking agents have the formula: ##STR1## wherein R 1 , R 2 , and R 3 and R 4 are independently vinyl, allyl, methallyl, propargyl, crotyl, C 1 to C 18 alkyl, aryl or inert group substituted derivatives thereof and where X is a saturated or unsaturated alkylene moiety having up to 12 carbon atoms saturated or unsaturated C 1 -C 18 heteroaliphatic, C 5 -C 18 heteroaromatic, C 5 -C 18 alicyclic or C 1 -C 18 heterocyclic, where n and m are independently 0 or integers of from 1-12 inclusive. These compounds are particularly useful as crosslinking agents for high temperature processable (>200°) polymers, especially fluorocarbon polymers. Also described are polymer compositions comprising from about 0.1 weight percent to about 50 weight percent of said crosslinking agent or mixture of said crosslinking agents. The products resulting from melt fabrication and subsequent crosslinking of such compositions are useful as shaped articles, e.g., wire products. Most of said compounds are novel compositions of matter.
A shaped article which article is the product of the process of subjecting a composition comprising a radiation crosslinkable polymer and from about 0.1 weight percent up to about 50 weight percent of at least one compound of the structural formula: ##STR49## wherein R 1 , R 2 , R 3 and R 4 are independently vinyl, allyl, methallyl, propargyl, crotyl, C 1 to C 18 alkyl or an aryl moiety having 6 to 14 ring carbons, any of which R 1 through R 4 groups may be unsubstituted or substituted with one or more inert substituent groups; wherein the X moiety is a saturated or unsaturated aliphatic moiety of 1 to 12 carbons, or saturated or unsaturated C 1 to C 18 heteroaliphatic, a C 5 to C 18 heteroaromatic, or C 5 to C 18 alicyclic or heterocyclic, and wherein m and n are independently 0 or an integer of 1 to 12 to at least one forming operation at a temperature in excess of the melting point of the major polymeric constituent of said composition and thereafter subjecting said article to ionizing radiation at a dose level of about 1 to 40 megarads.
Claim 2
Dependent Claim
196 words
A shaped article which article is the product of the process of subjecting a composition comprising a radiation crosslinkable polymer and from about 0.1 weight percent up to about 50 weight percent of at least one compound of the structural formula: ##STR49## wherein R 1 , R 2 , R 3 and R 4 are independently vinyl, allyl, methallyl, propargyl, crotyl, C 1 to C 18 alkyl or an aryl moiety having 6 to 14 ring carbons, any of which R 1 through R 4 groups may be unsubstituted or substituted with one or more inert substituent groups; wherein the X moiety is a saturated or unsaturated aliphatic moiety of 1 to 12 carbons, or saturated or unsaturated C 1 to C 18 heteroaliphatic, a C 5 to C 18 heteroaromatic, or C 5 to C 18 alicyclic or heterocyclic, and wherein m and n are independently 0 or an integer of 1 to 12 to at least one forming operation at a temperature in excess of the melting point of the major polymeric constituent of said composition and thereafter subjecting said article to ionizing radiation at a dose level of about 1 to 40 megarads.
Claim 3
Dependent Claim
27 words
A shaped article in accordance with claim 1 wherein said article has been subjected to ionizing radiation at a dose level of about 3 to 20 megarads.