Process for crosslinking
AssigneeUnion Carbide Chemicals & Plastics Technology Corporation
InventorsRichard G. Shaw, Paul J. Caronia
Life of this patent
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Abstract
A process for crosslinking comprising (a) introducing into a reactor, under crosslinking conditions, a mixture comprising (i) one or more polyolefins; (ii) organic peroxide; (iii) an ester, ether, or ketone containing two or more unsaturated groups; and (iv) a compound having the formula: ##STR1## wherein R=hydrogen, methyl, or ethyl; R.sup.1 =an alkylene having 1 to 6 carbon atoms; and R.sup.2 =an alkyl having 8 or more carbon atoms or Si(R.sup.3).sub.3 wherein R.sup.3 is hydrogen or alkoxy having 1 to 6 carbon atoms; each R.sup.3 is the same or different; and at least one R.sup.3 is an alkoxy, and (b) crosslinking the polyolefin(s).
Claims10
A process for crosslinking comprising (a) introducing into a reactor, under crosslinking conditions, a mixture comprising
- (i) one or more polyolefins;
- (ii) organic peroxide;
- (iii) an ester, ether or ketone containing two or more unsaturated groups;
- and
- (iv) a compound having the formula:
- ##STR5## wherein R=hydrogen, methyl, or ethyl;
- R.sup.1 =an alkylene having 1 to 6 carbon atoms;
- and
- R.sup.2 =an alkyl having 8 or more carbon atoms or Si(R.sup.3).sub.3 wherein R.sup.3 is hydrogen or alkoxy having 1 to 6 carbon atoms;
- each R.sup.3 is the same or different;
- and at least one R.sup.3 is an alkoxy,
- and (b) crosslinking the polyolefin(s).
A process for extrusion comprising (a) introducing into an extruder a mixture of (i) VLDPE, and, for each 100 parts by weight of VLDPE, the following components in about the following proportions:
- ______________________________________ Component Parts by Weight ______________________________________ (ii) dicumyl peroxide 0.2 to 2.0 (iii) triallyl cyanurate 0.1 to 1.8 or triallyl isocyanurate (iv) lauryl methacrylate 0.1 to 2.0 ______________________________________
- (b) extruding the mixture at a temperature in the range of about 130.degree. to about 260.degree. C., and (c) crosslinking the extrudate.
A composition comprising:
- (i) one or more polyolefins;;
- (ii) organic peroxide;
- (iii) ester, ether, or ketone containing two or more unsaturated groups;
- and
- (iv) a compound having the formula:
- ______________________________________ Component Parts by Weight ______________________________________ (ii) dicumyl peroxide 0.2 to 2.0 (iii) triallyl cyanurate 0.1 to 1.8 or triallyl isocyanurate (iv) lauryl methacrylate 0.1 to 2.0 ______________________________________ ##STR6## wherein R=hydrogen, methyl, or ethyl;
- R.sup.1 =an alkylene having 1 to 6 carbon atoms;
- and
- R.sup.2 =an alkyl having 8 or more carbon atoms or Si(R.sup.3).sub.3 wherein R.sup.3 is hydrogen or alkoxy having 1 to 6 carbon atoms;
- each R.sup.3 is the same or different;
- and at least one R.sup.3 is an alkoxy,
A composition comprising:
- (i) VLDPE, and for each 100 parts by weight of VLDPE, the following components in about the following proportions:
- ##STR7##
Dependencies are inferred from the claim text.