CA1217293A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Treated tire curing bladder, treatment composition therefor and method of curing tires
Assignee: Goodyear Tire and Rubber Co
•
Filing: 1981-12-02
•
Granted: 1987-01-27
•
Expires: 2001-12-02
Abstract
Abstract TREATED TIRE CURING BLADDER, TREATMENT COMPOSITION THEREFOR AND METHOD OF CURING TIRES ABSTRACT Lubricant composition comprised of clay, polydimethyl-siloxane of required viscosity range, poly(ethylene glycol and/or propylene glycol) of required molecular weight range and surfactant; method of preparation; method of treating tire cure bladder therefor; and method of molding a rubber tire utilizing such a coated cure bladder.
Inventors
- 👤 Robert F. Scheiderich
- 👤 Louis F. Comper
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-11-03 14:06
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/0601; B29D30/0654; B29C; B29C33/00; B29C33/56; B29C33/60; B29C33/62; B29C33/64; B29C43/00; B29C43/02; B29C43/10; B29C43/12; B29D2030/0655; B29K; B29K2019/00; B29L; B29L2030/00; C; C10; C10M; C10M2201/00; C10M2201/02; C10M2201/10; C10M2201/102; C10M2201/103; C10M2207/00; C10M2207/10; C10M2207/14; C10M2207/141; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2229/00; C10M2229/04; C10M2229/041; C10N; C10N2020/00; C10N2020/01
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
155 words
A method of preparing a composition which comprises: (A) mixing under high shear mixing conditions about 10 to about 40 parts by weight bentonite clay having a mesh size in the range of about 100 to about 500 U.S. Standard Sieve Size with about 500 to about 1500 parts by weight water at a temperature in the range of about 50°C to about 90°C until the mixture appears to be thickened; (B) mixing therewith while maintaining the mixture temperature in the range of about 20°C to about 95°C, about 15 to about 45 parts by weight polydimethylsiloxane characterized by having a viscosity in the range of about 40,000 to about 120,000 centistokes at 25°C, about 12 to about 36 parts by weight of at least one of polyethylene glycol and propylene glycol characterized by having a molecular weight in the range of about 1500 to about 2500, and surfactant for said polydimethylsiloxane and poly(alkylene glycol);
Claim 2
Independent Claim
155 words
A method of preparing a composition which comprises: (A) mixing under high shear mixing conditions about 10 to about 40 parts by weight bentonite clay having a mesh size in the range of about 100 to about 500 U.S. Standard Sieve Size with about 500 to about 1500 parts by weight water at a temperature in the range of about 50°C to about 90°C until the mixture appears to be thickened; (B) mixing therewith while maintaining the mixture temperature in the range of about 20°C to about 95°C, about 15 to about 45 parts by weight polydimethylsiloxane characterized by having a viscosity in the range of about 40,000 to about 120,000 centistokes at 25°C, about 12 to about 36 parts by weight of at least one of polyethylene glycol and propylene glycol characterized by having a molecular weight in the range of about 1500 to about 2500, and surfactant for said polydimethylsiloxane and poly(alkylene glycol);
Claim 3
Dependent Claim
58 words
A method of creating a cured rubber, expandable, toroidal shaped, pneumatic tire cure bladder for a pneumatic or semi-pneumatic tire which comprises coating the outer, exposed surface of the bladder in about 80 to about 150 percent of its tire curing expanded condition with a composition prepared according to the method of claim 1 and drying said composition.
Claim 4
Dependent Claim
13 words
The method of claim 2 where the bladder is of the butyl-type rubber.
Claim 5
Dependent Claim
12 words
The method of claim 3 where the said polydimethyl-siloxane is hydroxyl capped.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.