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Curable-epoxy-compositions-suitable-for-use-in-RIM-processes

Hardenable resin compositions

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Photopolymerizable dental composition containing a hexafunctional urethane methacrylate based on isocyanuric acid

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What is claimed is: 1. Thermal spray apparatus for providing a stream of molten heat fusible fluent ...

Autogenous flame spraying apparatus for the flame spraying of powder-form materials or spray powder

That object is attained by an autogenous flame spraying apparatus for the flame spraying of powder-...

Thermal spray method utilizing in-transit powder particle temperatures below their melting point

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Nickel-chromium corrosion coating and process for producing it

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Thermoplastic starch compositions incorporating a particulate filler component

OF THE PREFERRED EMBODIMENTS I. Introduction and General Definitions The present invention ...

Curable epoxy compositions suitable for use in RIM processes

Details

Inventors: De La Mare, Harold E.; Brownscombe, Thomas F.;
Assignee: Shell Oil Company (Houston, TX)
Primary Examiner: Lieberman; Paul
Assistant Examiner:
Attorney, Agent or Firm: Faringer; Norris E.

The present invention provides a rapid curing epoxy composition, suitable for RIM processes, which exhibits unexpectedly high modulus and strength and stability which comprises (1) an epoxy resin, (2) a polyamine or polyamide, (3) a catalyst selected from the group consisting of alkali and alkaline earth metal salts of selected acids, and (4) a polyalkylene ether glycol.

DETAILED DESCRIPTION What is claimed is: 1.
A rapid curing, storage stable, thermosetting composition, especially suitable for use in reaction injection molding processes comprising (1) an epoxy compound containing more than one vicinal epoxy group, (2) a curing amount of at least one amino compound containing at least three amino hydrogens, (3) a catalytic amount of lithium nitrate or calcium nitrate, and (4) from about 0.
1 to about 3 parts of a polyalkylene ether glycol per 100 parts by weight of epoxy compound.
2.
The composition of claim 1 wherein the epoxy compound is a glycidyl polyether of a polyhydric phenol.
3.
The composition of claim 2 wherein the epoxy compound is a glycidyl polyether of 2,2-bis(4-hydroxyphenyl)propane.
4.
The composition of claim 2 wherein the epoxy compound is a blend of (a) a glycidyl polyether of 2,2-bis(4-hydroxyphenyl)propane and (b) a glycidyl polyether of hydrogenated 2,2-bis(4-hydroxyphenyl)propane.
5.
The composition of claim 1 wherein the amino compound is a cycloaliphatic amine.
6.
The composition of claim 5 wherein the cycloaliphatic diamine is hydrogenated methylene dianiline.
7.
The composition of claim 5 wherein the cycyloaliphatic diamine is 1,2-diaminocyclohexane.
8.
The composition of claim 1 wherein the amino compound is a polyamide.
9.
The composition of claim 8 wherein the polyamide is an adduct of a polymeric fatty acid and triethylamine tetramine or diethylene triamine.
10.
The composition of claim 1 wherein the amino compound is a blend of hydrogenated methylene dianiline and an adduct of a polymeric fatty acid and triethylene tetramine or diethylene triamine.
11.
The composition of claim 1 wherein the catalyst is Ca(NO.
sub.
3).
sub.
2.
12.
The composition of claim 1 wherein the catalyst is LiNO.
sub.
3.
13.
The composition of claim 1 wherein the polyalkylene ether glycol is a polyethylene glycol.
14.
The composition of claim 13 wherein the polyethylene glycol has an average molecular weight of from about 200 to 600.
15.
The composition of claim 1 wherein the catalyst is employed in amounts from about 0

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