Epoxy resin system and pultrusion process employing same

Details Epoxy resin system and pultrusion process employing same Epoxy resin system and pultrusion process employing same

1986-12-29

1988-06-28

Nielsen, Earl

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528 98, 528115, C08G 5932

Patent

active

047540150

ABSTRACT:
An epoxy resin system is disclosed which is especially adapted for use in the pultrusion process. Such resin system comprises tris (hydroxyphenyl) methane-based epoxy resin and a combination of the cross-linking agents (methyl)-bicyclo(2,2,1) heptane-2,3-dicarboxylic anhydride and poly sebacic poly anhydride, the ratio of the dicarboxylic anhydride to the total amount of cross-linking agents ranging from 0.65 to 0.80 and the ratio of the poly anhydride to the total amount of cross-linking agents ranging from 0.35 to 0.20. The amount of total cross-linking agents to epoxy resin ranges from about 60 to about 80 parts total cross-linking agents, per 100 parts resin, by weight. A small amount of an imidazole accelerator, preferably 2-ethyl-4 methyl imidazole, is included. The pultrusion process includes the steps of creeling a plurality of fabric bands or individual fiber tows, collating the creeled bands, passing the array of collated bands through the above epoxy resin system heated in a wet-out tank, passing the wetted array of fabric bands through a forming guide to form a resin impregnated laminate, passing the laminate through a heated pultrusion die, and discharging a continuous length of cured fiber-epoxy composite from the die.

REFERENCES:
patent: 4394496 (1983-07-01), Shrader
patent: 4594291 (1986-06-01), Bertram et al.
patent: 4654382 (1987-03-01), Miza et al.
patent: 4672103 (1987-06-01), Wang et al.
patent: 4684700 (1987-08-01), Wang et al.

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