# US 4,391,929 A · Useful solutions of the tetramethylol derivative of 4,4'iso-propylidenediphenol

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- Number: US 4,391,929 A
- Document ID: US4391929A
- Status: Granted
- Kind: A
- Application number: 06/408,670
- Filed: 1982-08-16
- Granted: 1983-07-05
- Earliest claimed: 1980-01-13
- Assignees: Armstrong World Industries, Inc.
- Inventors: Thomas G. Harris
- Web page: https://patentgrep.com/patent/US4391929A

## CPC

- C08J 9/143: {Halogen containing compounds}
- C07C 39/12: polycyclic with no unsaturation outside the aromatic rings
- C08J 2361/06: of aldehydes with phenols
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS

## Abstract

The tetramethylol derivative of 4,4'iso-propylidenediphenol is dissolved in a solution of water and ethylene or propylene carbonate to yield concentrated solutions of the derivative in a form which may readily be used in the manufacture of foams or used as a liquid binder for molded ceiling products. Based on 100 parts by weight of the tertramethylol derivative, these solutions contain from about 15 to about 35 parts by weight of water and from about 5 to about 30 parts by weight of ethylene carbonate or propylene carbonate, with the total parts by weight of the water and carbonate varying from about 40 to about 45.

## Claims

### Claim 1

A foam produced by heating an acidified mixture of a solution comprising, in relative proportions, 10 parts by weight of the tetramethylol derivative of 4,4'iso-propylidenediphenol, about 15 to about 35 parts by weight water and about 5 to about 30 parts by weight of ethylene carbonate or propylene carbonate, with the total parts by weight of water and carbonate ranging from about 40 to about 45 with a surfactant and a blowing agent.

### Claim 2

A ceiling tile produced by mixing expanded perlite with a solution comprising, in relative proportions, 10 parts by weight of the tetramethylol derivative of 4,4'iso-propylidenediphenol, about 15 to about 35 parts by weight water and about 5 to about 30 parts by weight of ethylene carbonate or propylene carbonate, with the total parts by weight of water and carbonate ranging from about 40 to about 45, and compressing and curing the mix.