US5073608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bladder lubricant composition for tire molding
Assignee: DuPont Toray Specialty Materials KK
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Filing: 1990-05-09
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Granted: 1991-12-17
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Expires: 2010-05-09
Abstract
Abstract An improved bladder lubricant composition is disclosed which provides durable release of bladders from cured rubber tires in the manufacture of the latter. The composition comprises (A) an organopolysiloxane resin consisting essentially of phenylsilsesquioxane units and dimethylsiloxane units; (B) an organosilane having trioxime or trialkoxy functionality; (C) a condensation catalyst; and, optionally, (D) at least one diorganopolysiloxane having hydroxyl or alkoxy terminal groups.
Inventors
- 👤 Isao Ona
- 👤 Tsutomu Naganawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:08
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/54; C08K5/544; C08K5/5465; B; B29; B29C; B29C33/00; B29C33/56; B29C33/60; B29C33/62; B29C33/64; C08K5/541; C08K5/5415; C08K5/5419; C08L; C08L83/00; C08L83/04; C08G; C08G77/00; C08G77/04; C08G77/14; C08G77/16; C08G77/18; C08G77/70
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
132 words
A composition comprising: (A) about 50 to 90 weight percent of an organopolysiloxane resin consisting essentially of about 10 to 90 weight percent Ph-SiO 3/2 siloxane units, in which Ph denotes a phenyl group, and about 90 to 10 weight percent (CH 3 ) 2 SiO 2/2 siloxane units; (B) about 2 to 35 weight percent of an organosilane selected from the group consisting of an organosilane represented by the formula ##STR9## and an organosilane represented by the formula R--Si(OR.sup.1).sub.3 wherein R, R 1 and R 2 in the above formulas are monovalent hydrocarbon groups; (C) about 0.1 to 10 weight percent of a condensation catalyst; and (D) up to about 30 weight percent of at least one diorganopolysiloxane having terminal groups selected from the group consisting of hydroxyl and alkoxy groups.
Claim 2
Dependent Claim
132 words
A composition comprising: (A) about 50 to 90 weight percent of an organopolysiloxane resin consisting essentially of about 10 to 90 weight percent Ph-SiO 3/2 siloxane units, in which Ph denotes a phenyl group, and about 90 to 10 weight percent (CH 3 ) 2 SiO 2/2 siloxane units; (B) about 2 to 35 weight percent of an organosilane selected from the group consisting of an organosilane represented by the formula ##STR9## and an organosilane represented by the formula R--Si(OR.sup.1).sub.3 wherein R, R 1 and R 2 in the above formulas are monovalent hydrocarbon groups; (C) about 0.1 to 10 weight percent of a condensation catalyst; and (D) up to about 30 weight percent of at least one diorganopolysiloxane having terminal groups selected from the group consisting of hydroxyl and alkoxy groups.
Claim 3
Dependent Claim
34 words
The composition according to claim 1, wherein R, R 1 and R 2 of said organosilane (B) are each selected from the group consisting of alkyl radicals having from 1 to 3 carbon atoms.
Claim 4
Dependent Claim
31 words
The composition according to claim 2, wherein said diorganopolysiloxane (D) is selected from the group consisting of polydimethylsiloxane and polydimethylsiloxane in which the methyl groups are partially substituted by organoamine groups.
Claim 5
Dependent Claim
16 words
The composition according to claim 3, wherein R and R 1 are each a methyl radical.
Claim 6
Dependent Claim
25 words
The composition according to claim 4, wherein said diorganopolysiloxane (D) is present at a level of about 1 to 10 weight percent of said composition.
Claim 7
Dependent Claim
10 words
A rubber substrate coated with the composition of claim 1.
Claim 8
Dependent Claim
10 words
A rubber substrate coated with the composition of claim 2.
Claim 9
Dependent Claim
10 words
A rubber substrate coated with the composition of claim 3.
Claim 10
Dependent Claim
10 words
A rubber substrate coated with the composition of claim 4.
Claim 11
Dependent Claim
10 words
A rubber substrate coated with the composition of claim 5.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-12-16 | 1995-06-17 | 1995-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-16 | 1999-06-17 | 1999-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-16 | 2003-06-17 | 2003-12-17 | $7700.00 | Window Closed / Lapsed |