Use of mixtures of monoperoxycarbonate peroxides for the cross-linking and composition of cross-linkable polymers
AssigneeArkema France
InventorsAlfredo Defrancisci, Chao Lu
Life of this patent
Estimating the term…
Abstract
The use of peroxide(s) for cross-linking at least one polymer, the polymer having a homopolymer or copolymer of ethylene and especially the ethylene-vinyl acetate copolymer (EVA) or a mixture of the EVA with another homopolymer or copolymer of ethylene, and at least one peroxide, wherein the peroxide includes OO-tert-butyl O-isopropyl monoperoxycarbonate or OO-tert-amyl O-isopropyl monoperoxycarbonate and OO-tert-butyl-O-2-ethyl hexyl monoperoxycarbonate or OO-tert-amyl-O-2ethyl hexyl monoperoxycarbonate. Also, a cross-linkable composition including the peroxide and to a method for producing a cross-linked polymer as a result of the peroxide.
Claims18
A crosslinkable composition comprising at least one ethylene-vinyl acetate (EVA) copolymer and a combination of peroxides, wherein the combination of peroxides comprises:
- (i) O,O-tert-butyl O-isopropyl monoperoxycarbonate or O,O-tert-amyl O-isopropyl monoperoxycarbonate;
- and
- (ii) O,O-tert-butyl O-2-ethylhexyl monoperoxycarbonate or O,O-tert-amyl O-2-ethylhexyl monoperoxycarbonate,
- in a mass ratio of 40%/60% to 60%/40% of peroxide (i)/peroxide (ii),
- wherein the total amount of peroxide (i) and peroxide (ii) represents between 0.2% and 4% of the mass amount of the polymer present in the composition.
A crosslinkable composition comprising at least one ethylene-vinyl acetate (EVA) copolymer and at least one peroxide, wherein the peroxide comprises:
- (i) O,O-tert-butyl O-isopropyl monoperoxycarbonate or O,O-tert-amyl O-isopropyl monoperoxycarbonate;
- and
- (ii) O,O-tert-butyl O-2-ethylhexyl monoperoxycarbonate or O,O-tert-amyl O-2-ethylhexyl monoperoxycarbonate,
- in a mass ratio of 40%/60% to 60%/40% of peroxide (i)/peroxide (ii),
- wherein, after crosslinking, the composition possesses an electrical resistivity by volume of 8.0E+15 ohm·cm to 1.0E+16 ohm·cm, and
- wherein the total amount of peroxide (i) and peroxide (ii) represents between 0.2% and 4% of the mass amount of the polymer present in the composition.
Dependencies are inferred from the claim text.