Patent US4237173A successfully refreshed from Google Patents.
US4237173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
White sidewall tire
Assignee: Aerojet Rocketdyne Holdings Inc
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Filing: 1979-04-26
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Granted: 1980-12-02
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Expires: 1999-04-26
Abstract
Abstract White tire sidewall made from a urethane derived from a hydrogenated diphenylmethane diisocyanate terminated apolytetrahydrofuran and pigmented with titanium dioxide has exceptionally good flex resistance and adhesion. High molecular weight triol and a low molecular weight diol are used to chain extend and crosslink the urethane.
Inventors
- 👤 Tiong H. Kuan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:42
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/28; C08G18/40; C08G18/48; C08G18/4854; C08G18/70; C08G18/72; C08G18/74; C08G18/75; C08G18/758; C08J; C08J7/00; C08J7/04; C08J7/043; C08J7/046; C08G2380/00; C08J2321/00; C08J2475/00; C08J2475/04; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31569
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A pneumatic tire characterized in the sidewall is coated with: (a) a catalyzed reaction product of 100 parts of: (1) a prepolymer of a hydrogenated diphenylmethane diisocyanate-terminated polytetrahydrofuran containing from 2 to 6% by weight of isocyanate groups; (2) a chain extending diol having a 2 to 6 carbon atom chain; and (3) a chain extending and crosslinking triol having a molecular weight of from 130 to 11,000; wherein the ratio of NCO groups of (1) to the total OH groups of (2) and (3) has a value of from 100:80 to 100:97; (b) reinforced by the addition of from 4 to 10 parts of a titanium dioxide pigment.
Claim 2
Dependent Claim
109 words
A pneumatic tire characterized in the sidewall is coated with: (a) a catalyzed reaction product of 100 parts of: (1) a prepolymer of a hydrogenated diphenylmethane diisocyanate-terminated polytetrahydrofuran containing from 2 to 6% by weight of isocyanate groups; (2) a chain extending diol having a 2 to 6 carbon atom chain; and (3) a chain extending and crosslinking triol having a molecular weight of from 130 to 11,000; wherein the ratio of NCO groups of (1) to the total OH groups of (2) and (3) has a value of from 100:80 to 100:97; (b) reinforced by the addition of from 4 to 10 parts of a titanium dioxide pigment.
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) | 1983-12-02 | 1984-06-02 | 1984-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-02 | 1988-06-02 | 1988-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-02 | 1992-06-02 | 1992-12-02 | $7700.00 | Window Closed / Lapsed |