C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/6565
C08L 23/08 (2006.01) C08J 3/24 (2006.01) C08K 5/098 (2006.01) C08L 23/02 (2006.01) C08L 31/06 (2006.01) C08L 33/02 (2006.01)
Patent
CA 1039429
ABSTRACT OF THE DISCLOSURE Process for ionically crosslinking first copolymers formed by copolymerizing at least one alpha-olefin of the general formula RCH=CH2 wherein R is hydrogen or hydrocarbyl having 1 to 8 carbon atoms and at least one alpha,beta- ethylenically unsaturated carboxylic acid having 1 to 2 carboxylic acid groups and 3 to 8 carbon atoms, the alpha- olefin content of the first copolymer comprising at least 50 mole percent of the first copolymer, the alpha,beta- ethylenically unsaturated acid content of said first co- polymer comprising 0.2 to 25 mole percent of the first co- polymer which comprises mixing the first copolymer with a cation-supplying blend of 20 to 80 percent by weight of substantially water-insoluble zinc oxide and/or zinc hydroxide and/or zinc carbonate, 0 to 10 percent by weight of a lubri- cant and a complemental amount of a second copolymer with a melt index of 50 to 2000 g./10 min. formed as the first copolymer, at a pressure of 100 to 10,000 p.s.i., at a temp- erature above the melting point of both the first and second copolymers and between 100°C. and 330°C., with the amount of the cation-supplying blend present being that amount which has sufficient cations to neutralize at least 10 percent of the carboxylic acid groups in the first and second copolymers and neutralizing at least 10 percent of the carboxylic acid groups in the first and second copolymers, characterized in that there is present during the crosslinking reaction, 0.5 to 20 percent by weight, based on the total weight of the cation-supplying blend, of at least one zinc salt of a volatile organic acid. The resultant ionically crosslinked copolymers are useful in film molding and foam for insulation.
212437
Powell Richard J.
Prejean George W.
E.i. Du Pont de Nemours And Company
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