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US4849470A
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Polyurethane systems especially adapted for surge suppression
Assignee: Advanced Protection Technologies Inc
•
Filing: 1988-10-31
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Granted: 1989-07-18
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Expires: 2008-10-31
Abstract
Abstract A polyurethane system especially adapted for surge suppression comprising the reaction product of: A 1. Castor oil 2. A molecular sieve having the composition M 1 12 (Al O 2 ) 12 (Si O 2 ) 12 , wherein M 1 is an alkali cation 3. Polydimethyl siloxane 4. Hindered phenol antioxidant 5. Tetraisopropyl diphenyl carbodiimide 6. 10, 10 1 -oxybisphenoxarsine 7. Alumina trihydrate and B 8. 4, 4 1 diphenylmethane diisocyanate; the system having a Shore hardness of 80 to 90.
Inventors
- 👤 Charles H. Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:46
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/302; C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/36; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/34; C08K5/00; C08K5/16; C08K5/29; C08K5/59; C08L; C08L75/00; C08L75/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
106 words
A polyurethane system especially adapted for surge suppression components comprising the reaction product of: ______________________________________
Parts by
Weight
______________________________________
A,
1. Castor oil 30 to 40
2. A molecular sieve having the composition
2 to 4
M.sub.12 .sup.1 (Al O.sub.2).sub.12 (Si O.sub.2).sub.12,
wherein M.sup.1 is an alkali cation
3. Polydimethyl siloxane 1.5 to 2.0
4. Hindered phenol antioxidant
0.15 to 0.25
5. Tetraisopropyl diphenyl carbodiimide
1.5 to 2.5
6. 10, 10.sup.1 - oxybisphenoxarsine
1.5 to 2.5
7. Alumina trihydrate 35 to 60
and B, wherein B is:
8. 4, 4.sup.1 diphenylmethane diisocyanate;
16 to 24
______________________________________ The system having a Shore hardness of 80 to 90.
Claim 2
Dependent Claim
106 words
A polyurethane system especially adapted for surge suppression components comprising the reaction product of: ______________________________________
Parts by
Weight
______________________________________
A,
1. Castor oil 30 to 40
2. A molecular sieve having the composition
2 to 4
M.sub.12 .sup.1 (Al O.sub.2).sub.12 (Si O.sub.2).sub.12,
wherein M.sup.1 is an alkali cation
3. Polydimethyl siloxane 1.5 to 2.0
4. Hindered phenol antioxidant
0.15 to 0.25
5. Tetraisopropyl diphenyl carbodiimide
1.5 to 2.5
6. 10, 10.sup.1 - oxybisphenoxarsine
1.5 to 2.5
7. Alumina trihydrate 35 to 60
and B, wherein B is:
8. 4, 4.sup.1 diphenylmethane diisocyanate;
16 to 24
______________________________________ The system having a Shore hardness of 80 to 90.
Claim 3
Dependent Claim
17 words
The system of claim 1 in which 4.5 to 5.5 parts of A/1 Part B are employed.
Claim 4
Dependent Claim
23 words
The system of claim 2 in which carbon black in an amount of from 0.4 to 0.6 parts is also utilized in A.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-17 | 1993-01-16 | 1993-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-17 | 1997-01-16 | 1997-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-17 | 2001-01-16 | 2001-07-18 | $7700.00 | Window Closed / Lapsed |