# US 4,397,998 A · Curable epoxy compositions suitable for use in RIM processes

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- Number: US 4,397,998 A
- Document ID: US4397998A
- Status: Granted
- Kind: A
- Application number: 06/330,413
- Filed: 1981-12-14
- Granted: 1983-08-09
- Earliest claimed: 1981-12-14
- Assignees: Shell Oil Company
- Inventors: Harold E. De La Mare; Thomas F. Brownscombe
- Web page: https://patentgrep.com/patent/US4397998A

## CPC

- C08G 59/68: characterised by the catalysts used
- C08F 283/10: on to polymers containing more than one epoxy radical per molecule {(C08F283/004 takes precedence)}
- C08G 59/44: Amides
- C08G 59/50: Amines
- C08L 63/00: Compositions of epoxy resins; Compositions of derivatives of epoxy resins
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

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.

## Claims

### Claim 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.

### Claim 2 (depends on 1)

The composition of claim 1 wherein the epoxy compound is a glycidyl polyether of a polyhydric phenol.

### Claim 3 (depends on 2)

The composition of claim 2 wherein the epoxy compound is a glycidyl polyether of 2,2-bis(4-hydroxyphenyl)propane.

### Claim 4 (depends on 2)

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.

### Claim 5 (depends on 1)

The composition of claim 1 wherein the amino compound is a cycloaliphatic amine.

### Claim 6 (depends on 5)

The composition of claim 5 wherein the cycloaliphatic diamine is hydrogenated methylene dianiline.

### Claim 7 (depends on 5)

The composition of claim 5 wherein the cycyloaliphatic diamine is 1,2-diaminocyclohexane.

### Claim 8 (depends on 1)

The composition of claim 1 wherein the amino compound is a polyamide.

### Claim 9 (depends on 8)

The composition of claim 8 wherein the polyamide is an adduct of a polymeric fatty acid and triethylamine tetramine or diethylene triamine.

### Claim 10 (depends on 1)

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.

### Claim 11 (depends on 1)

The composition of claim 1 wherein the catalyst is Ca(NO.sub.3).sub.2.

### Claim 12 (depends on 1)

The composition of claim 1 wherein the catalyst is LiNO.sub.3.

### Claim 13 (depends on 1)

The composition of claim 1 wherein the polyalkylene ether glycol is a polyethylene glycol.

### Claim 14 (depends on 13)

The composition of claim 13 wherein the polyethylene glycol has an average molecular weight of from about 200 to 600.

### Claim 15 (depends on 1)

The composition of claim 1 wherein the catalyst is employed in amounts from about 0.05 to about 5.0 parts per 100 parts by weight of epoxy compound.

### Claim 16 (depends on 1)

The composition of claim 1 wherein the weight ratio of catalyst to polyalkylene ether glycol is from about 1:1 to about 1:5.