US4017464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polytetramethylene ether urethane cured with 2,2'-diaminodiphenyl disulphide
Assignee: Goodyear Tire and Rubber Co
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Filing: 1976-02-05
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Granted: 1977-04-12
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Expires: 1996-02-05
Abstract
Abstract Polytetramethylene ether urethane having improved physical properties is produced by reacting polytetramethylene ether polyol with a toluene diisocyanate containing at least 50 percent 2,4 isomer, reacting at a temperature no greater than about 40 DEG C. to produce a prepolymer and curing the prepolymer with 2,2'-dithio dianiline having the formula <IMAGE> at a temperature of 105 DEG C.
Inventors
- 👤 Michael E. Kimball
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:57
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/74; C08G18/76; C08G18/7614; C08G18/7621; C08G18/08; C08G18/10; C08G18/28; C08G18/40; C08G18/48; C08G18/4854
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
80 words
A polytetramethylene ether polyol urethane prepared by reacting a mol of a polytetramethylene ether polyol having 2 to 3 hydroxyls and an average molecular weight of 1000 to 4000 with 1.6 to 4 mols of toluene diisocyanate containing at least 50 percent by weight of the 2,4 isomer at a temperature from ambient to 40° C. to form a prepolymer and curing said prepolymer at a temperature no higher than 150° C. with 0.8 to 0.95 mol percent of 2,2'-dithiodianiline.
Claim 2
Dependent Claim
80 words
A polytetramethylene ether polyol urethane prepared by reacting a mol of a polytetramethylene ether polyol having 2 to 3 hydroxyls and an average molecular weight of 1000 to 4000 with 1.6 to 4 mols of toluene diisocyanate containing at least 50 percent by weight of the 2,4 isomer at a temperature from ambient to 40° C. to form a prepolymer and curing said prepolymer at a temperature no higher than 150° C. with 0.8 to 0.95 mol percent of 2,2'-dithiodianiline.
Claim 3
Dependent Claim
13 words
The urethane of claim 1 wherein the polytetramethylene ether polyol has 2 hydroxyls.
References Cited (Backward Citations)
US3036996A
Cited
US3926919A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-11 | 1980-10-11 | 1981-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-11 | 1984-10-11 | 1985-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-11 | 1988-10-11 | 1989-04-12 | $7700.00 | Window Closed / Lapsed |