US 4,900,792 AGranted

Crosslinkable polyethylene composition

AssigneeAllied-Signal Inc.

InventorsShu P. Chen, Theodore R. Engelmann, Harold D. Oltmann

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Abstract

The present invention relates to a composition comprising crosslinkable polyethylene homopolymer, copolymer or mixture thereof. The composition includes a peroxide crosslinking agent, a crosslinking co-agent, and a metal compound having a cation selected from Group IIA and IIB of the Periodic Table of Elements. The composition is particularly useful for polymers which are formed using Ziegler-type catalysts and have complete terminal saturation. The present invention also includes a composition which has been found particularly suitable for use in critical molding processes such as rotational molding. This composition comprises a polyethylene homopolymer, copolymer, or mixture thereof. The present invention includes a method of rotational molding.

Claims17

Dependent claims

A composition consisting essentially of a polymer selected from the group consisting of ethylene homopolymers and ethylene copolymers, and mixtures thereof, the polymers having substantially complete terminal saturation:

from 0.1 to 3.0 part by weight based on 100 parts of the polymer of an organic peroxide crosslinking agent;
from 0.5 to 5.0 parts by weight based on 100 parts of the polymer of an allyl crosslinking co-agent or a co-agent selected from the group of dimethacrylate compounds, trimethacrylate compounds, divinyl benzene, vinyl toluene, vinyl pyridine, p-quinone dioxime, acrylic acid, cyclohexyl methacrylate, and 1,2-polybutadiene;
sufficient amount of a metal compound having a cation selected from Group IIA and IIB of the Periodic Table of Elements to substantially neutralize acidic compound in the polymer;
and
a peroxide scavenger.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 07/285,674Filed 16 Dec 1988 · division
Priority: 13 Jun 1983
Granted: 13 Feb 1990
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

C08K 5/0091
Use of organic ingredients: complexes with metal-heteroatom-bonds
C08F 255/02
Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00: on to polymers of olefins…
C08K 3/105
Metal compounds: compounds containing metals of Groups 1 to 3 or of Groups 11 to 13 of the Periodic Table
C08K 5/14
Oxygen-containing compounds: peroxides