US4547478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst systems for polyurethane compositions
Assignee: Wyeth Holdings LLC
•
Filing: 1984-03-09
•
Granted: 1985-10-15
•
Expires: 2004-03-09
Abstract
Abstract A catalyst composition is disclosed for polyurethane production by reaction between aliphatic hydroxyl-containing compounds and secondary or tertiary aliphatic isocyanate group-containing compounds, comprising (i) 1,8-diazabicyclo(5.4.0)-undecene-7, or a salt thereof; (ii) an organic tin compound and, optionally, (iii) an organic lead compound.
Inventors
- 👤 Eugene Y. C. Chang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:16
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/06; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/161; C08G18/163; C08G18/70; C08G18/72; C08G18/73; C08G18/74; C08G18/75; C08G18/76; C08G18/7614; C08G18/7628; C08G2120/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
66 words
A composition for the catalysis of reaction between an aliphatic hydroxyl-containing compound and a hindered aliphatic secondary or tertiary isocyanate group containing compound, said catalyst composition comprising (i) 1,8-diazabicyclo(5.4.0)-undecene-7 or a salt thereof; (ii) a dialkyl tin dicarboxylate and, optionally, (iii) a divalent lead salt of an organic acid, the weight ratios of (i):(ii):(iii) being in the range, respectively, of from about 0.5:1:0 to about 2:1:3.
Claim 2
Dependent Claim
66 words
A composition for the catalysis of reaction between an aliphatic hydroxyl-containing compound and a hindered aliphatic secondary or tertiary isocyanate group containing compound, said catalyst composition comprising (i) 1,8-diazabicyclo(5.4.0)-undecene-7 or a salt thereof; (ii) a dialkyl tin dicarboxylate and, optionally, (iii) a divalent lead salt of an organic acid, the weight ratios of (i):(ii):(iii) being in the range, respectively, of from about 0.5:1:0 to about 2:1:3.
Claim 3
Dependent Claim
14 words
A composition as defined in claim 1, wherein component (i) is the phenolate salt.
Claim 4
Dependent Claim
33 words
A composition as defined in claim 1 wherein said dialkyl tin dicarboxylate is of the formula: ##STR8## wherein R is C 1 -C 8 alkyl and R' is C 1 -C 18 alkyl.
Claim 5
Dependent Claim
22 words
A composition as defined in claim 3 wherein said dialkyl tin dicarboxylate is selected from dimethyl tin dilaurate and dibutyl tin dilaurate.
Claim 6
Dependent Claim
13 words
A composition as defined in claim 1 wherein component (iii) is lead naphthenate.
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) | 1988-10-14 | 1989-04-15 | 1989-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-14 | 1993-04-15 | 1993-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-14 | 1997-04-15 | 1997-10-15 | $7700.00 | Window Closed / Lapsed |