Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface
Patent
1998-09-03
2000-01-18
Vargot, Mathieu D.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Shaping against forming surface
249 65, 264326, 425 43, 425 52, B29C 3500, C08F21008
Patent
active
060155256
ABSTRACT:
Disclosed are expandable bladders for use in curing presses for rubber compositions such as pneumatic tires. The bladders are a crosslinked elastomer comprising an isobutylene rubbery polymer. The bladder composition includes alkylphenoxypoly(alkyleneoxy)-alkanol which improves the release characteristics of the cured bladder from a tire innerliner cured in contact with said bladder. The improved release characteristics allow rubber compositions such as tires to be molded with fewer defects caused during release of the bladder from the tires or caused by abraded or deformed bladders. The use of alkylphenoxypoly(alkyleneoxy)alkanol also increases the useful life time of the bladder allowing more tires to be cured without changing bladders.
REFERENCES:
patent: 3932088 (1976-01-01), Harada et al.
patent: 5538218 (1996-07-01), Patitsas et al.
patent: 5593701 (1997-01-01), Graves et al.
patent: 5728311 (1998-03-01), Patitsas et al.
Butyl and Chlorobutyl.TM. Rubber (Chapter 10) pp. 249-273 of Rubber Technology, 2.sup.nd Ed., edited by Maurice Morton, published by Robert E. Krieger Publishing Co., Malabar, Florida 1973.
Trade Literature from Exxon Chemical Co., 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.
Trade Literature titles IGEPAL.RTM. Nonionic Surfactants published by Rhone-Poulenc: Cranbury, New Jersey, apparently published Mar. 1997, consisting of 11 pages of sales and technical data on IGEPAL.RTM. surfactants.
Trade Literature titles IGEPAL.RTM. CA Nonionic Surfactants published by Rhone-Poulenc: Cranbury, New Jersey, apparently published Mar. 1997, consisting of 6 pages of sales and technical data on IGEPAL.RTM. surfactants.
Patitsas George Philemon
Sandstrom Paul Harry
The Goodyear Tire & Rubber Company
Vargot Mathieu D.
Young, Jr. Henry C.
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