# US 4,394,286 A · Partially hydrolyzed, DMT process residue, and useful propylene oxide derivative thereof

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- Number: US 4,394,286 A
- Document ID: US4394286A
- Status: Granted
- Kind: A
- Application number: 06/265,503
- Filed: 1981-05-20
- Granted: 1983-07-19
- Earliest claimed: 1981-05-20
- Assignees: Hercofina
- Inventors: William H. Millick, III
- Web page: https://patentgrep.com/patent/US4394286A

## CPC

- C08G 18/3221: {hydroxylated esters of carboxylic acids other than higher fatty acids}
- C08G 18/4887: {containing carboxylic ester groups derived from carboxylic acids other than acids of higher fatty oils or other than resin acids}
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS

## Abstract

Disclosed is partially hydrolyzed, DMT process residue. Also disclosed is the reaction product of propylene oxide and the partially hydrolyzed, DMT process residue. The reaction product is useful as a polyol reactant in the preparation of urethane foams.

## Claims

### Claim 1

As a composition of matter, partially hydrolyzed, DMT process residue, characterized by an Acid No. of about 150-375 mg. KOH/g.

### Claim 2

A process for preparing partially hydrolyzed, DMT process residue, which comprises establishing a mixture of water and DMT process residue at a weight ratio of water to residue of about 0.05-5, a temperature of 200.degree.-285.degree. C. and a pressure of 220-1150 psig, and maintaining said mixture under these conditions until the Acid No. thereof has increased to about 150-375 mg. KOH/g.

### Claim 3 (depends on 2)

The process according to claim 2 in which, after the partially hydrolyzed, DMT process residue has been formed, residual water is removed

### Claim 4

As a composition of matter, a mixture of partially hydrolyzed, DMT process residue characterized by an Acid No. of about 150-375 mg. KOH/g, and a glycol containing 4 or more carbon atoms.

### Claim 5 (depends on 4)

A composition of matter according to claim 4 in which said glycol is dipropylene glycol.

### Claim 6

As a composition of matter, the propylene oxide reaction product of partially hydrolyzed, DMT process residue, which residue is characterized by an Acid No. of about 150-375 mg KOH/g.

### Claim 7 (depends on 6)

A composition of matter according to claim 6 in which the Acid No. of the reaction product is about 0.2-10 mg KOH/g and the Hydroxyl value of the reaction product is 4-13.5%.

### Claim 8

As a composition of matter, a mixture consisting essentially of the propylene oxide reaction product of partially hydrolyzed, DMT process residue, which residue is characterized by an Acid No. of about 150-375 mg. KOH/g., and dipropylene glycol up to about 20% of the mixture.

### Claim 9 (depends on 8)

A composition of matter according to claim 8, the viscosity of which at 25.degree. C. is less than 150,000 cps.