Tire curing bladder with improved release from the tire innerlin

Details Tire curing bladder with improved release from the tire innerlin Tire curing bladder with improved release from the tire innerlin

1994-09-28

1996-07-23

Vargot, Mathieu D.

Static molds

Having inflatable element

156401, 264315, 264326, 425 39, 425 52, B29C 3500, C08F21008

Patent

active

055382185

ABSTRACT:
Expandable bladders for use in curing presses for hydrocarbon rubbers such as pneumatic tires are a crosslink elastomer comprising isobutylene repeat units and include graphite. A preferred isobutylene elastomer is a brominated copolymer of isobutylene and p-methylstyrene. The bladders have enhanced lubricity, low adhesion to tire innerliners, and lower hot tension set. The above enhancements allow hydrocarbon rubbers such as tires to be molded with fewer defects caused by abraded or deformed bladders. They also enhance the useful life of the bladder reducing the cost of tire curing.

REFERENCES:
patent: 3932088 (1976-01-01), Harada et al.
patent: 3967968 (1976-07-01), Stone et al.
patent: 4310427 (1982-01-01), Wun
patent: 4333977 (1982-06-01), Abrahams et al.
patent: 4407988 (1983-10-01), Abrahams et al.
patent: 4863650 (1989-09-01), Kohler et al.
patent: 5063268 (1991-11-01), Young
patent: 5162409 (1992-11-01), Mroczkowski
patent: 5238991 (1993-08-01), Magnus et al.
"Standard Test Methods for Vulcanized Rubber and Thermoplastic Rubbers and Thermoplastic Elastomers-Tension", published by ASTM; Philadelphia, PA (1992) ASTM D412-92.
"Butyl and Chlorobutyl.TM. Rubber", (Chapter 10) pp. 249-273, of Rubber Technology, 2nd Ed., edited by Maurice Morton, published by Robert E. Krieger Publishing Co.: Malabar, Florida, 1973.
Trade Literature from Exxon Chemical Company: Houston, Texas, apparently published Oct., 1993, consisting of 68 printed pages including general fliers, specification sheets, and tire curing bladder recipes all related to Exxpro.TM. products.

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