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US 5,856,425 AGranted
Dispensable resin paste
AssigneeOccidental Chemical Corporation
InventorsJerold C. Rosenfeld, Sergio R. Rojstaczer
Life of this patent
Estimating the term…
Abstract
Disclosed is a resin paste made from a maleimide having at least two maleimide groups and a liquid diamine. The paste can optionally contain fillers, thickeners, defoamers, coupling agents, and solid epoxies. The resin paste has a long pot life and a short cure time and is dispensable through a syringe.
Claims20
A resin paste comprising
- (A) a maleimide having at least two maleimide groups;
- (B) liquid aliphatic primary diamine having a boiling point greater than 100.degree. C., where the molar ratio of said maleimide to said diamine is about 1 to about 3 and the weight ratio of said diamine to said maleimide is about 1.5 to about 3;
- (C) up to about 80 wt % of a filler;
- (D) up to about 6 wt % of a thickener;
- (E) up to about 1 wt % of a defoamer;
- (F) up to about 5 wt % of a coupling agent;
- and
- (G) up to about 10 wt % of a solid epoxy.
5 more elements
A resin paste according to claim 3 wherein said maleimide has the general formula:
- ##STR6## where R is aryl or aliphatic from C.sub.2 to C.sub.30.
A resin paste comprising
- (A) a solid bismaleimide;
- (B) liquid aliphatic primary diamine having a boiling point greater than 100.degree. C., where the molar ratio of said bismaleimide to said diamine is about 1 to about 3 and the weight ratio of said diamine to said bismaleimide is about 1.5 to about 3, selected from the group consisting of siloxane-containing diamines, non-siloxane-containing diamines that have 20 to 40 carbon atoms, and mixtures thereof;
- (C) up to about 80 wt % of a filler;
- (D) up to about 6 wt % of a thickener;
- (E) up to about 1 wt % of a defoamer;
- (F) up to about 5 wt % of a coupling agent;
- and
- (G) up to about 10 wt % of a solid epoxy.
5 more elements
A resin paste comprising
- (A) a solid maleimide having the general formula ##STR9## where R is aryl from C.sub.2 to C.sub.30 and n is at least 1;
- (B) liquid aliphatic primary diamine having a boiling point greater than 100.degree. C., where the molar ratio of said maleimide to said diamine is about 1 to about 2 and the weight ratio of said diamine to said maleimide is about 2 to about 3, where said liquid diamine comprises about 10 to about 90 mole % of a liquid siloxane-containing diamine having the general formula:
- ##STR10## and about 10 to about 90 mole % of a non-siloxane-containing diamine that has 20 to 40 carbon atoms, where m is 10 to 50;
- (C) up to about 80 wt % of a filler;
- (D) up to about 6 wt % of a thickener;
- (E) up to about 1 wt % of a defoamer;
- (F) up to about 5 wt % of a coupling agent;
- and
- (G) up to about 10 wt % of a solid epoxy.
6 more elements
Dependencies are inferred from the claim text.