US4430131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane binders
Assignee: Her Majesty the Queen in Right of Canada
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Filing: 1981-11-06
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Granted: 1984-02-07
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Expires: 2001-11-06
Abstract
Abstract The invention disclosed relates to novel ε-caprolactone co-polyesters which when combined with diisocyanates are useful as binders in solid urethane-type propellant formulations. Said co-polyesters are prepared by the reaction, (in the presence of a catalyst for the reaction) and a dicarboxylic acid.
Inventors
- 👤 Meude Tremblay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:16
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4266; C08G63/00; C08G63/02; C08G63/60; Y; Y10; Y10S; Y10S149/00; Y10S149/11; Y10S149/114
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
147 words
A process for the preparation of a polyurethane binder comprising reacting a diisocyanate with a block or sequenced co-polyester diol of the structural formula I H(OR.sub.3 COOR.sub.4 CO).sub.x OCH.sub.2 CH.sub.2 O[CO(CH.sub.2).sub.5 O].sub.y H I which comprises simultaneously reacting ε-caprolactone in the presence of a catalyst with (i) a diol of structural formula II HO--R--OH II as co-catalyst for the reaction wherein R is an alkyl group containing 1 to 8 carbon atoms or an alkyl group containing 1-12 carbon atoms having a nitrogen atom in its backbone; and (ii) a di-carboxylic acid of structural formula III HOOC(CH.sub.2).sub.m COOH III wherein m is an in integer from 1 to 36, and wherein R 3 is the residual structure of a diol of structural formula II and R 4 is the residual structure of a diacid of structural formula III, and x and y are integers of about 1-10.
Claim 2
Dependent Claim
147 words
A process for the preparation of a polyurethane binder comprising reacting a diisocyanate with a block or sequenced co-polyester diol of the structural formula I H(OR.sub.3 COOR.sub.4 CO).sub.x OCH.sub.2 CH.sub.2 O[CO(CH.sub.2).sub.5 O].sub.y H I which comprises simultaneously reacting ε-caprolactone in the presence of a catalyst with (i) a diol of structural formula II HO--R--OH II as co-catalyst for the reaction wherein R is an alkyl group containing 1 to 8 carbon atoms or an alkyl group containing 1-12 carbon atoms having a nitrogen atom in its backbone; and (ii) a di-carboxylic acid of structural formula III HOOC(CH.sub.2).sub.m COOH III wherein m is an in integer from 1 to 36, and wherein R 3 is the residual structure of a diol of structural formula II and R 4 is the residual structure of a diacid of structural formula III, and x and y are integers of about 1-10.
Claim 3
Dependent Claim
33 words
The process according to claim 1 in which the diisocyanate is selected from the group consisting of isophorone diisocyanate, an intermediate made from a 36-carbon dimer aliphatic dibasic acid, and a polyfunctional isocyanate.
Claim 4
Dependent Claim
24 words
The process according to claim 1 in which the reaction product of ε-caprolactone, sebacic acid and propylene glycol is reacted with a polyfunctional isocyanate.
Claim 5
Dependent Claim
24 words
The process according to claim 1 in which the reaction product of ε-caprolactone, sebacic acid and 1,3-butane diol is reacted with a polyfunctional isocyanate.
Claim 6
Dependent Claim
134 words
A polyurethane binder for use in a solid propellant comprising the reaction product of a diisocyanate and a block or sequenced co-polyester diol produced by the process of claim 1 and having the structural formula H(OR.sub.3 COOR.sub.4 CO).sub.x OCH.sub.2 CH.sub.2 O[CO(CH.sub.2).sub.5 O].sub.y H I wherein R 3 is the residual structure of a diol of structural formula II HO--R--OH II in which R is an alkyl group containing 1 to 8 carbon atoms or an alkyl group containing 1-12 carbon atoms having a nitrogen atom in its backbone; and R 4 is the residual structure of a diacid of structural formula III HOOC(CH.sub.2).sub.m COOH III in which m is an integer from 1 to 36; x is an integer from about 1 to 10; and y is an integer from about 1 to 10.
Claim 7
Dependent Claim
34 words
The polyurethane binder according to claim 5 in which the diisocyanate is selected from the group consisting of isophorone, diisocyanate, and intermediate made from a 36-carbon dimer aliphatic dibasic acid, and a polyfunctional isocyanate.
Claim 8
Dependent Claim
14 words
The polyurethane binder composition according to claim 5 or 6 further including a plasticizer.
Claim 9
Dependent Claim
14 words
A polyurethane binder according to claim 7 in which the plasticizer is isodecyl pelargonate.
Claim 10
Dependent Claim
28 words
A co-polyester-urethane propellant comprising by weight about 70% of ammonium perchlorate, about 18% of finely divided aluminum, and about 12% of a binder as defined in claim 5.
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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) | 1987-02-06 | 1987-08-08 | 1988-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-06 | 1991-08-08 | 1992-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-06 | 1995-08-08 | 1996-02-07 | $7700.00 | Window Closed / Lapsed |