B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 27/06 (2006.01) B60C 1/00 (2006.01) C08K 5/46 (2006.01)
Patent
CA 2102230
2102230 9220538 PCTABS00017 Disclosed is at least a two-layered chlorinated polyethylene film for use as an inner liner for a pneumatic rubber substrate or a tire, with an inner layer adjacent an inner surface of the rubber substrate comprising an adhesive resin; and an outer layer consisting essentially of chlorinated polyethylene containing from 35 to 50 % by weight chlorine, a derivative of 2,5-dimercapto 1-3,4 thiadiazole as a curative, an accelerator, an acid acceptor, and optionally containing carbon black. The film is from 0.13 mm (5 mil) to 0.76 mm (30 mil) in thickness, and has oxygen permeability from 6x10-12 to 36x10-12cc-cm/cm2-cmHg-sec (10 to 60 cc-mil/100 sq.in.-atm-day). The film containing carbon black typically has an intermediate layer of a thermoplastic elastomer interposed between the adhesive layer and CPE layer. Further disclosed is a pneumatic rubber substrate or a tire incorporating chlorinated polyethylene films of the present invention.
Davis William H. Jr.
Dollinger Susan E.
Smart & Biggar
The Dow Chemical Company
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