# US 5,348,983 A · Foamed polylactide moldings and production thereof

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- Number: US 5,348,983 A
- Document ID: US5348983A
- Status: Granted
- Kind: A
- Application number: 08/155,146
- Filed: 1993-11-22
- Granted: 1994-09-20
- Earliest claimed: 1992-11-26
- Assignees: BASF SE
- Inventors: Hans-Josef Sterzel
- Web page: https://patentgrep.com/patent/US5348983A

## CPC

- C08J 9/141: {Hydrocarbons}
- C08L 67/04: Polyesters derived from hydroxycarboxylic acids, e.g. lactones (C08L67/06 takes precedence)
- C08J 2367/04: Polyesters derived from hydroxy carboxylic acids, e.g. lactones (C08J2367/06 takes precedence)
- 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)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

The invention relates to foamed polylactide articles obtainable by foaming a mixture of amorphous polylactide granules which contain a blowing agent and of a finely divided polylactide which does not contain a blowing agent, and to a process for producing same.

## Claims

### Claim 1

A process for producing foamed polylactide articles by which is at least 90% by weight either L- or D-enantiomer heating and foaming a mixture of amorphous polylactide which polylactide is at least 90% by weight either L- or D-enantiomer granules which contain a blowing agent and of a finely divided polylactide which does not contain a blowing agent in a mold.

### Claim 2 (depends on 1)

A process as claimed in claim 1, wherein the finely divided polylactide which does not contain a blowing agent comprises from 0.01 to 50% by weight of the mixture.

### Claim 3 (depends on 2)

A process as claimed in claim 2, wherein the particle size of the polylactide which doesnot contain a blowing agent is from 0.001 to 0.5 mm.