Modification of vinyl ester resins with reactive liquid polymers
AssigneeThe B. F. Goodrich Company
InventorsAlan R. Siebert, C. Dale Guiley
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Abstract
Vinyl ester resins of the type already having reactive liquid polymers reacted into the backbone of the resins, are cured in the presence of a reactive liquid polymer additive admixed with the prereacted vinyl ester resin. Heating of the system during cure causes the reactive liquid polymer additive to miscibilize with the vinyl ester base resin. The vinyl ester resin modified in the manner described above shows a significant enhancement in toughness as measured by fracture energy over unmodified counterparts or counterparts modified by known methods of adduction or admixing alone.
Claims9
A corrosion-resistant pipe comprising:
- a toughened cured vinyl ester resin composition comprising a cured mixture of a prereacted vinyl ester base resin having a first reactive liquid polymer, which is a polyfunctional carboxyl-terminated type polymer having a functionality of from about 0.8 to about 3.5 and which is reacted into its backbone;
- and an effective amount of an additional reactive liquid polymer additive, selected from the group consisting of polyfunctional carboxyl-terminated butadiene type polymer, a polyfunctional carboxyl-terminated butadiene-acrylonitrile type random copolymer, a statistical difunctional carboxyl-terminated butadiene-acrylonitrile-acrylic acid terpolymer, a polyfunctional epoxy-terminated butadiene-acrylonitrile type copolymer, a statistical difunctional hydroxyl-terminated epihalohydrin type polymer, and a statistical difunctional vinylidene-terminated butadiene-acrylonitrile type copolymer, to improve the fracture energy of the cured vinyl ester resin composition by an amount greater than about 1.2 times the fracture energy of the base resin.
Dependencies are inferred from the claim text.