Wires insulated by polytetramethylene terephthalate of...

Details Wires insulated by polytetramethylene terephthalate of... Wires insulated by polytetramethylene terephthalate of...

H - Electricity

01

B

400/3015, 400/51

H01B 3/42 (2006.01) C08K 5/00 (2006.01) C08L 67/02 (2006.01)

Patent

CA 1127784

MP0267 S P E C I F I C A T I O N "WIRES INSULATED BY POLYTETRAMETHYLENE TEREPHTHALATE OF REDUCED EMBRITTLEMENT" ABSTRACT OF THE DISCLOSURE Wires insulated by polytetramethylene tereph- thalate (PTMT) polymers of reduced embrittlement. 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 40,000 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.

325467

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