US4588645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber articles having an improved appearance
Assignee: Shin-Etsu Chemical Co Ltd
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Filing: 1985-02-27
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Granted: 1986-05-13
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Expires: 2005-02-27
Abstract
Abstract A rubber article having an improved appearance is disclosed, which is provided at its surface with a coating of an organopolysiloxane having a friction coefficient corresponding to 1.2-3.0 times that of the particular non-branched polydimethylsiloxane.
Inventors
- 👤 Masaki Ogawa
- 👤 Yasuro Shiomura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:09
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J2321/00; C08J2483/00; Y; Y10; Y10S; Y10S528/00; Y10S528/901; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
121 words
A rubber article having at its surface a coating of an organopolysiloxane, whose friction coefficient being 1.2 to 3.0 times that of a non-branched polydimethylsiloxane having a volatile loss of 0.1% when heating at 150° C. for 2 hours and a viscosity at 25° C. of 5,000 cst; said friction coefficient being measured by placing a steel column having a bottom area of 20 cm 2 and a weight of 100 g on a sample of 0.5 μm in thickness arranged on a polished steel plate and applying a force to the column in a direction parallel with the steel plate and expressed as a value of dividing a force required in the beginning of the column movement by 100 g.
Claim 2
Dependent Claim
121 words
A rubber article having at its surface a coating of an organopolysiloxane, whose friction coefficient being 1.2 to 3.0 times that of a non-branched polydimethylsiloxane having a volatile loss of 0.1% when heating at 150° C. for 2 hours and a viscosity at 25° C. of 5,000 cst; said friction coefficient being measured by placing a steel column having a bottom area of 20 cm 2 and a weight of 100 g on a sample of 0.5 μm in thickness arranged on a polished steel plate and applying a force to the column in a direction parallel with the steel plate and expressed as a value of dividing a force required in the beginning of the column movement by 100 g.
Claim 3
Dependent Claim
26 words
The rubber article according to claim 1, wherein said organopolysiloxane has a volatile loss of less than 2% when heating at 150° C. for 2 hours.
Claim 4
Dependent Claim
22 words
The rubber article according to claim 1, wherein said organopolysiloxane has a viscosity of 25° C. of not less than 200 cst.
Claim 5
Dependent Claim
19 words
The rubber article according to claim 1, wherein said organopolysiloxane is uniformly applied at a thickness of 5-30 μm.
Claim 6
Dependent Claim
19 words
The rubber article according to claim 1, wherein said organopolysiloxane is applied in the form of O/W type emulsion.
Claim 7
Dependent Claim
26 words
The rubber article according to claim 5, wherein said emulsion contains 0.05-5 parts by weight of mica based on 100 parts by weight of said organopolysiloxane.
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) | 1989-05-12 | 1989-11-11 | 1990-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-12 | 1993-11-11 | 1994-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-12 | 1997-11-11 | 1998-05-13 | $7700.00 | Window Closed / Lapsed |