# US 5,344,910 A · Heat-resistant polycarbonate resins containing 2-alkyl-3,3-bis(p-hydroxyphenyl)phthalimide

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

- Number: US 5,344,910 A
- Document ID: US5344910A
- Status: Granted
- Kind: A
- Application number: 08/035,843
- Filed: 1993-03-23
- Granted: 1994-09-06
- Earliest claimed: 1993-03-23
- Assignees: General Electric Company
- Inventors: Paul D. Sybert
- Web page: https://patentgrep.com/patent/US5344910A

## CPC

- C08G 64/12: containing nitrogen
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS

## Abstract

Polycarbonate resins containing repeating or recurring polymer chain units of the formula: ##STR1## wherein R represents alkyl are useful in high temperature applications, when thermoplastically molded into articles.

## Claims

### Claim 1

A synthetic polymeric resin containing recurring or repeating polycarbonate chain units of the formula: ##STR13## wherein R represents an alkyl having 1 to 12 carbon atoms.

### Claim 2 (depends on 1)

The resin of claim 1 wherein R is methyl.

### Claim 3 (depends on 1)

The resin of claim 1 wherein R is butyl.

### Claim 4

A synthetic polymeric resin containing recurring or repeating polycarbonate chain units of the formula: ##STR14## wherein R represents an alkyl having 1 to 12 carbon atoms; said chain units being interrupted by second chain units of formula: ##STR15## wherein D is a divalent aromatic moiety of formula: ##STR16## wherein A is a divalent hydrocarbon radical containing from 1 to about 15 carbon atoms; a substituted divalent hydrocarbon radical containing from 1 to about 15 carbon atoms and halogen; --S--; --SS--; --S(O)--; --S(O).sub.2 --; --O--; or --C(O)--; each X is independently selected from the group consisting of halogen and a monovalent hydrocarbon radical selected from the group consisting of an alkyl group of from 1 to about 8 carbon atoms, and aryl of from 6-18 carbon atoms, an aralkyl group of from 7 to about 14 carbon atoms, an alkaryl group of from 7 to about 14 carbon atoms, an alkoxy group of from 1 to about 8 carbon atoms, and an aryloxy group of from 6 to about 18 carbon atoms; and m is zero or 1 and n is an integer of from 0 to 5.

### Claim 5 (depends on 4)

The resin of claim 4 wherein the chain unit of formula (III) is residue of bisphenol-A after phosgenation.

### Claim 6 (depends on 5)

The resin of claim 5 herein R is methyl.

### Claim 7 (depends on 5)

The resin of claim 5 wherein R is butyl.

### Claim 8 (depends on 5)

The resin of claim 5 containing dicarboxylic acid ester units in the polymer chain.