Epoxy latent catalyst

Details Epoxy latent catalyst Epoxy latent catalyst

1980-01-14

1982-05-25

Nielsen, Earl A.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

2521883R, 525507, 528 90, 528 94, 528109, 528117, 528391, 4283222, 523466, 523468, C08G 5968

Patent

active

043315828

ABSTRACT:
A catalyst for forming ambient temperature stable diamino-diphenyl sulfone-epoxy composition comprises the half-salt of a strong aromatic sulfonic acid such as toluene sulfonic acid and an imidazole, preferably an alkylated imidazole such as 2-ethyl-4-methylimidazole. The composition fully cures at moderate temperature to form a humidity resistant resin having a high heat distortion temperature and can be impregnated onto reinforcing fibers such as graphite to form composites.

REFERENCES:
patent: 2897179 (1959-07-01), Schechter et al.
patent: 3438937 (1969-04-01), Christie
patent: 3553166 (1971-01-01), Anderson et al.
patent: 3562213 (1971-02-01), Collis
patent: 3635894 (1972-01-01), Dowbenko et al.
patent: 3678007 (1972-07-01), Dowbenko et al.
patent: 3746686 (1973-07-01), Marshall et al.
patent: 3755253 (1973-08-01), Rice
Staab et al., "Thionyldiimidazole and Sulfuryldiimidazole" Chemical Abstracts 65, 12195f (1966).

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