Chlorine-containing polyethylene-and polyether-based elastomers stabilized with barium sulfate
AssigneeThe Gates Corporation
InventorDennis Kemper
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Abstract
Chlorine-containing polyethylene- and polyether-based elastomer compositions having excellent heat resistance and chemical resistance, which are heat stabilized with from about 1 to about 25 parts per hundred weight of the elastomer of barium sulfate, and high temperature and chemical resistant molded and extruded products including automotive hose and cable jacketing incorporating such elastomer compositions.
Claims14
A high temperature and chemical resistant elastomeric composition for incorporation in an article subject to high temperature or chemical exposure, comprising:
- a) 100 parts of a chlorine-containing elastomer selected from the group consisting of;
- i) chlorine-containing polyethylene-based elastomers, and
- ii) chlorine-containing polyether-based elastomers;
- and
- b) from about 1 to about 25 parts per hundred weight of said elastomer, of barium sulfate which serves as the heat stabilizer of said chlorine-containing elastomer,
- said composition being substantially free of heat stabilizers containing lead, said composition exhibiting high temperature and chemical resistance properties substantially equivalent or superior to a lead oxide-heat stabilized elastomeric composition.
A high temperature and chemical resistant hose, comprising an inner tube portion, a reinforcement layer telescoped about said inner tube portion, and an outer tube portion, wherein at least one of said inner tube portion or outer tube portion is prepared from an elastomeric composition exhibiting high temperature and chemical resistance properties substantially equivalent or superior to a lead oxide-heat stabilized elastomeric composition, said elastomeric composition comprising:
- a) 100 parts of a chlorine-containing elastomer selected from the group consisting of;
- i) chlorine-containing polyethylene-based elastomers, and
- ii) chlorine-containing polyether-based elastomers;
- and
- b) from about 1 to about 25 parts per hundred weight of said elastomer, of barium sulfate which serves as the heat stabilizer of said chlorine-containing elastomer,
- said composition being substantially free of heat stabilizers containing lead.
A high temperature and chemical resistant hose, comprising an inner tube portion, a reinforcement layer telescoped about said inner tube portion, and an outer tube portion, wherein at least one of said inner tube portion or outer tube portion is prepared from an elastomeric composition exhibiting high temperature and chemical resistance properties substantially equivalent or superior to a lead oxide-heat stabilized elastomeric composition, said elastomeric composition comprising:
- a) 100 parts of chlorinated polyethylene elastomer;
- and
- b) from about 10 to about 15 parts per hundred weight of said elastomer, of barium sulfate, which serves as the heat stabilizer of said chlorinated polyethylene elastomer,
- said composition being substantially free of heat stabilizers containing lead.
A method of heat stabilizing a chlorine-containing polyethylene- or polyether-based elastomeric composition in the substantial absence of heat stabilizers containing lead comprising the steps of:
- a) adding from about 1 to about 25 parts per hundred weight of said elastomer of barium sulfate to 100 parts of said elastomer to form a mixture;
- and,
- b) curing said mixture.
Dependencies are inferred from the claim text.