US4131605A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Poly(ether)urethane curable at ambient temperature using butylstannoic acid catalyst
Assignee: PPG Industries Inc
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Filing: 1978-01-03
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Granted: 1978-12-26
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Expires: 1998-01-03
Abstract
Abstract A transparent, elastomeric polyurethane which may be cast and cured in place at ambient temperature is prepared by the reaction of a cycloaliphatic diisocyanate with a polyalkylene ether glycol and a crosslinking agent in the presence of butyl stannoic acid catalyst.
Inventors
- 👤 Vernon G. Ammons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:03
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/65; C08G18/66; C08G18/6666; C08G18/667; C08G18/6674; C08G18/6677; C08G18/08; C08G18/16; C08G18/22; C08G18/24; C08G18/242; C08G18/40; C08G18/4009; C08G18/4018; C08G18/70; C08G18/72; C08G18/74; C08G18/75
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
39 words
An ambient temperature curable polyurethane composition prepared by the reaction of: a. an aliphatic diisocyanate; b. a polyalkylene ether glycol; c. a compound comprising three hydroxyl groups capable of reacting with isocyanato groups; and d. butyl stannoic acid catalyst.
Claim 2
Dependent Claim
39 words
An ambient temperature curable polyurethane composition prepared by the reaction of: a. an aliphatic diisocyanate; b. a polyalkylene ether glycol; c. a compound comprising three hydroxyl groups capable of reacting with isocyanato groups; and d. butyl stannoic acid catalyst.
Claim 3
Dependent Claim
14 words
The polyurethane composition according to claim 1, wherein compound (c) is a polyester triol.
Claim 4
Dependent Claim
15 words
The polyurethane composition according to claim 2, wherein the aliphatic diisocyanate is a cycloaliphatic diisocyanate.
Claim 5
Dependent Claim
14 words
The polyurethane composition according to claim 3, wherein the cycloaliphatic diisocyanate is 4,4'-methylene-bis-(cyclohexyl isocyanate),
Claim 6
Dependent Claim
16 words
The polyurethane composition according to claim 2, wherein the polyalkylene ether glycol is polytetramethylene ether glycol.
Claim 7
Dependent Claim
22 words
The polyurethane composition according to claim 5, wherein the polyalkylene ether glycol has a molecular weight between about 600 and about 1000.
Claim 8
Dependent Claim
15 words
The polyurethane composition according to claim 2, wherein the polyester triol is a polycaprolactone triol.
Claim 9
Dependent Claim
20 words
The polyurethane composition according to claim 7, wherein the polycaprolactone triol has a molecular weight between about 300 and 1000.
Claim 10
Independent Claim
71 words
A method for making a composite sheet structure which comprises an ambient temperature curable polyurethane interlayer comprising the steps of: a. casting into a sheet mold a liquid reaction mixture which comprises: (1) an aliphatic diisocyanate; (2) a polyalkylene ether glycol; (3) a compound comprising three hydroxyl groups capable of reacting with isocyanato groups; and (4) butyl stannoic acid catalyst; and b. curing the reaction mixture in place at ambient temperature.
Claim 11
Independent Claim
71 words
A method for making a composite sheet structure which comprises an ambient temperature curable polyurethane interlayer comprising the steps of: a. casting into a sheet mold a liquid reaction mixture which comprises: (1) an aliphatic diisocyanate; (2) a polyalkylene ether glycol; (3) a compound comprising three hydroxyl groups capable of reacting with isocyanato groups; and (4) butyl stannoic acid catalyst; and b. curing the reaction mixture in place at ambient temperature.
Claim 12
Dependent Claim
13 words
The method according to claim 9, wherein compound (3) is a polyester triol.
Claim 13
Dependent Claim
13 words
The method according to claim 10, wherein the aliphatic diisocyanate is 4,4'-methylene-bis-(cyclohexyl isocyanate).
Claim 14
Dependent Claim
24 words
The method according to claim 10, wherein the polyalkylene ether glycol is polytetramethylene ether glycol of molecular weight between about 600 and about 1000.
Claim 15
Dependent Claim
23 words
The method according to claim 10, wherein the polyester triol is a polycaprolactone triol of molecular weight between about 300 and about 1000.
Claim 16
Dependent Claim
28 words
The method according to claim 10, wherein the concentration of butyl stannoic acid catalyst in the reaction mixture is between about 500 and about 1000 parts per million.
Claim 17
Dependent Claim
19 words
The method according to claim 14, wherein the polyurethane is fully cured at ambient temperature in about two weeks.
References Cited (Backward Citations)
US3194773A
Cited
US3194770A
Cited
US3060137A
Cited
US3509015A
Cited
US3620905A
Cited
US3931113A
Cited
US3764457A
Cited
US3900446A
Cited
US3900655A
Cited
US4035548A
Cited
US4024113A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-25 | 1982-06-26 | 1982-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-25 | 1986-06-26 | 1986-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-25 | 1990-06-26 | 1990-12-26 | $7700.00 | Window Closed / Lapsed |