Polymeric compositions
US4332855A · kind A · utility
5Cited by
21References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 14, 1978 |
| Grant date | Jun 1, 1982 |
| Priority date | — |
| Expiry date | Apr 14, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31681
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
New polymeric compositions based on polytetramethylene terephthalate (PTMT) polymers are disclosed. PTMT polymers are subject to embrittlement, especially at elevated temperatures and when a flame retardant is incorporated therein. This problem is substantially reduced by blending the PTMT polymer with a second polymer which has a flex modulus of 500 to 100,000 psi and a solubility parameter within .+-.1.5 of the PTMT polymer, for example an ethylene/vinyl acetate copolymer or a block copolymer containing polyether and polyester blocks. The compositions are particularly useful as wire insulation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.