US5079327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane elastomers
Assignee: Bayer Corp
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Filing: 1990-02-09
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Granted: 1992-01-07
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Expires: 2010-02-09
Abstract
Abstract The present invention is directed to a solid polyurethane composition having a glass transition temperature of from -20 DEG C. to 0 DEG C., having a Bayshore rebound of less than 20, and having a Shore A hardness of less than 80, and being prepared by reacting: a) a polyisocyanate having an isocyanate group functionality of 3 or more, and an isocyanate group content of from 15 to 25% by weight, with b) one or more diols having molecular weights of from 150 to about 650, wherein the isocyanate to hydroxyl equivalent ratio is from 0.95:1 to 1.2:1, and the weight ratio of component a) to component b) is from 5:1 to 1:1.5.
Inventors
- 👤 Ashok M. Sarpeshkar
- 👤 Charles S. Gracik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:35
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/4833; C08G18/30; C08G18/32; C08G18/3203; C08G18/3206; C08G18/4825; C08G18/4854; C08G18/65; C08G18/66; C08G18/6666; C08G18/667; C08G18/6674; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/79; C08G18/791; C08G18/792; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
105 words
A solid polyurethane composition having a glass transition temperature of from -20° C. to 0° C., having a Bayshore rebound of less than 20, and having a Shore A hardness of less than 80, and being prepared by reacting: (a) a polyisocyanate having an isocyanate group functionality of 3 or more, and an isocyanate group content of from 15 to 25% by weight, with (b) one or more diols having molecular weights of from 150 to about 650, wherein the isocyanate to hydroxyl equivalent ratio is from 0.95:1 to 1.2:1, and the weight ratio of component (a) to component (b) is from 5:1 to 1:1.5.
Claim 2
Dependent Claim
105 words
A solid polyurethane composition having a glass transition temperature of from -20° C. to 0° C., having a Bayshore rebound of less than 20, and having a Shore A hardness of less than 80, and being prepared by reacting: (a) a polyisocyanate having an isocyanate group functionality of 3 or more, and an isocyanate group content of from 15 to 25% by weight, with (b) one or more diols having molecular weights of from 150 to about 650, wherein the isocyanate to hydroxyl equivalent ratio is from 0.95:1 to 1.2:1, and the weight ratio of component (a) to component (b) is from 5:1 to 1:1.5.
Claim 3
Dependent Claim
30 words
The composition of claim 1 wherein said polyisocyanate has an isocyanate group functionality of from 3 to 4 and an isocyanate group content of from 19 to 24% by weight.
Claim 4
Dependent Claim
20 words
The composition of claim 1 wherein the weight ratio of component (a) to component (b) is from 3:1 to 1:1.5.
Claim 5
Dependent Claim
24 words
The composition of claim 1 wherein said diol is selected from the group consisting of polyethylene glycols, polytetramethylene glycols, polypropylene glycols and polybutylene glycols.
References Cited (Backward Citations)
US4722946A
Cited
US5013810A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-01-06 | 1995-07-08 | 1996-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-06 | 1999-07-08 | 2000-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-06 | 2003-07-08 | 2004-01-07 | $7700.00 | Window Closed / Lapsed |