Patent US4087412A successfully refreshed from Google Patents.
US4087412A
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Organotin catalyst system for isocyanate reactions
Assignee: 3M Co
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Filing: 1976-05-11
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Granted: 1978-05-02
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Expires: 1996-05-11
Abstract
Abstract An organotin catalyst system for catalyzing the formation of polyurethane polymers comprising a catalytic amount of a mixture of a bis(tri-n-alkyl tin)oxide and the reaction product of a carboxylic acid and a dialkyl tin oxide.
Inventors
- 👤 James D. Groves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:54
CPC Classifications
H; H10; H10D; H10D30/00; H10D30/60; H10D30/64; H10D30/66; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/22; C08G18/24; C08G18/242; C08G18/28; C08G18/67; C08G18/69
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
58 words
An organotin catalyst system for catalyzing the formation of urethane compounds comprising a catalytic amount of a mixture of a bis(tri-n-alkyl tin)oxide and the reaction product of a dialkyl tin oxide with a carboxylic acid, wherein the concentration ratio of said reaction product to said bis(tri-n-alkyl tin)oxide is from about 5.0 to 1 to about 0.1 to 1.
Claim 2
Dependent Claim
58 words
An organotin catalyst system for catalyzing the formation of urethane compounds comprising a catalytic amount of a mixture of a bis(tri-n-alkyl tin)oxide and the reaction product of a dialkyl tin oxide with a carboxylic acid, wherein the concentration ratio of said reaction product to said bis(tri-n-alkyl tin)oxide is from about 5.0 to 1 to about 0.1 to 1.
Claim 3
Dependent Claim
15 words
The catalyst system of claim 1 wherein said reaction product is a dialkyl tin dicarboxylate.
Claim 4
Dependent Claim
15 words
The catalyst system of claim 2 wherein said dialkyl tin dicarboxylate is dibutyl tin di-2-ethylhexanoate.
Claim 5
Dependent Claim
13 words
The catalyst system of claim 1 wherein said bis(tri-n-alkyl tin)oxide is bis(tri-n-butyl tin)oxide.
Claim 6
Dependent Claim
91 words
A process comprising the steps of: (a) mixing together in reaction proportions an organic polyisocyanate and a compound having terminal hydroxy groups containing active hydrogen, together with (b) a catalytic amount of an organotin catalyst system for catalyzing the reaction of the components of (a), said catalyst system comprising a mixture of a bis(tri-n-alkyl tin)oxide and the reaction product of a dialkyl tin oxide with a carboxylic acid, wherein the concentration ratio of said reaction product to said bis(tri-n-alkyl tin)oxide is from about 5.0 to 1 to about 0.1 to 1.
Claim 7
Dependent Claim
91 words
A process comprising the steps of: (a) mixing together in reaction proportions an organic polyisocyanate and a compound having terminal hydroxy groups containing active hydrogen, together with (b) a catalytic amount of an organotin catalyst system for catalyzing the reaction of the components of (a), said catalyst system comprising a mixture of a bis(tri-n-alkyl tin)oxide and the reaction product of a dialkyl tin oxide with a carboxylic acid, wherein the concentration ratio of said reaction product to said bis(tri-n-alkyl tin)oxide is from about 5.0 to 1 to about 0.1 to 1.
Claim 8
Dependent Claim
14 words
The process of claim 5 wherein said reaction product is a dialkyl tin dicarboxylate.
Claim 9
Dependent Claim
14 words
The process of claim 6 wherein said dialkyl tin dicarboxylate is dibutyl tin di-2-ethylhexanoate.
Claim 10
Dependent Claim
12 words
The process of claim 5 wherein said bis(tri-n-alkyl tin)oxide is bis(tri-n-butyl tin)oxide.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-01 | 1981-10-31 | 1982-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-01 | 1985-10-31 | 1986-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-01 | 1989-10-31 | 1990-05-02 | $7700.00 | Window Closed / Lapsed |