Back to results
US 4,381,378 AGranted
Method for vulcanizing ethylene/acrylic or vinyl ester/glycidyl(meth)acrylate copolymer with piperazinium dicarboxylate salt and composition for same
AssigneeE. I. Du Pont de Nemours and Company
InventorLeon L. Harrell, Jr.
Life of this patent
Estimating the term…
Abstract
Elastomeric ethylene/acrylic or vinyl ester/glycidyl(meth)acrylate copolymers, optionally containing carbon monoxide moieties, are used with piperazinium dicarboxylate salts, e.g. piperazinium diacetate.
Claims12
A vulcanizable elastomeric composition comprising a copolymer consisting essentially of copolymerized units of:
- (a) 25-65 weight percent of a comonomer selected from the group consisting of acrylic and vinyl esters, provided that the acrylic ester is other than glycidyl acrylate and glycidyl methacrylate,
- (b) 2-10 weight percent of a cure-site monomer selected from the group consisting of glycidyl acrylate and glycidyl methacrylate,
- (c) 0-15 weight percent carbon monoxide, and
- (d) a complemental amount of ethylene from 30-70 weight percent,
- and a curing agent selected from the group consisting of piperazinium dicarboxylate salts derived from the acids with pKa values in the range of 4.0-5.2.
2 more elements
A method of vulcanizing an elastomeric composition, said composition comprising a copolymer consisting essentially of copolymerized units of:
- (a) 25-62 weight percent of a comonomer selected from the group consisting of acrylic and vinyl esters, provided that the acrylic ester is other than glycidyl acrylate and glycidyl methacrylate,
- (b) 2-10 weight percent of a cure-site monomer selected from the group consisting of glycidyl acrylate and glycidyl methacrylate,
- (c) 0-15 weight percent carbon monoxide, and
- (d) a complemental amount of ethylene from 30-70 weight percent,
- said method comprising mixing with said composition a curing agent selected from the group consisting of piperazinium dicarboxylate salts derived from acids with pKa values in the range of 4.0-5.2, and then heating the resulting mixture.
2 more elements
Dependencies are inferred from the claim text.