# US 4,394,463 A · Rigid polyurethane foams made from amino polyols modified with epoxy resins

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 4,394,463 A
- Document ID: US4394463A
- Status: Granted
- Kind: A
- Application number: 06/289,560
- Filed: 1981-08-03
- Granted: 1983-07-19
- Earliest claimed: 1980-09-02
- Assignees: Texaco Inc.
- Inventors: Michael Cuscurida; Neal J. Grice; George P. Speranza
- Web page: https://patentgrep.com/patent/US4394463A

## CPC

- C08G 59/504: {containing an atom other than nitrogen belonging to the amine group, carbon and hydrogen}
- C08G 18/5069: {prepared from polyepoxy compounds}
- C08G 59/145: {Compounds containing one epoxy group}
- C08G 59/64: Amino alcohols
- C08G 65/26: from cyclic ethers and other compounds
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS

## Abstract

The modification of rigid amino polyols by their reaction with epoxy resin and alkylene oxides is described. The modified polyols produce rigid polyurethane foams that have higher heat distortion temperatures and better low temperature properties than foams made with nonmodified polyols. The viscosities of the epoxy resin-modified amino polyols are not significantly different than those of the prior art amino polyols although they are of a higher functionality.

## Claims

### Claim 1

An improved rigid polyurethane foam produced by the reaction of a modified amino polyol, an organic polyisocyanate and one or more foam catalysts where in the improvement comprises making the modified amino polyol by the reaction of components comprising
(a) a rigid foam polyol initiator having an active hydrogen functionality equal to or greater than four,
(b) an amine,
(c) one or more alkylene oxides and
(d) an epoxy resin.

### Claim 2

A method for producing an improved rigid polyurethane foam which comprises
(a) making a modified amino polyol by the reaction of
(1) a rigid foam polyol initiator having an active hydrogen functionality equal to or greater than four,
(2) an amine,
(3) one or more alkylene oxides and
(4) an epoxy resin and
(b) reacting said modified polyol with an organic polyisocyanate and one or more suitable foam catalysts.