Electric wire and cable
US4767668A · kind A · utility
9Cited by
10References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 10, 1986 |
| Grant date | Aug 30, 1988 |
| Priority date | — |
| Expiry date | Jul 10, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/294
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Electrical wire and cable is provided with a layer of insulation or jacketing material which comprises a mixture of: (1) a polyester based on tetramethylene terephthalate, preferably polytetramethylene terephthalate; and (2) more than 40%, based on polymer (1), of a block copolymer preferably having polytetramethylene terephthalate hard blocks and poly(polytetramethylene oxide terephthalate) soft blocks. Polymer (2) has a flex modulus of at least 69 MPa preferably at least 138 MPa. The insulation or jacketing material exhibits improved resistance to stress crazing in a number of solvents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.