Polyester sheet materials and molded articles and methods for the manufacture thereof
US4971860A · kind A · utility
1Cited by
0References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 27, 1989 |
| Grant date | Nov 20, 1990 |
| Priority date | — |
| Expiry date | Feb 27, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31786
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Unoriented polyester sheet materials and molded articles having a thickness of at least 10 mil and having excellent clarity and heat stability. The polyester used in the manufacture of the sheet materials and molded articles are derived from terephthalic acid and 1,4-butanediol and certain modifying monomers. Methods for manufacturing the aforesaid sheet materials and molded articles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.