Patent US4041019A successfully refreshed from Google Patents.
US4041019A
Expired / Lapsed
US
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Delayed-action, heat activated-urethane catalyst
Assignee: Dow Chemical Co
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Filing: 1975-10-22
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Granted: 1977-08-09
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Expires: 1995-10-22
Abstract
Abstract New catalysts are described for promoting the reaction of organic isocyanates with organic compounds bearing active hydrogen. These new catalysts correspond to the formula ##STR1## WHEREIN: N IS AN INTEGER OF FROM 1 TO 3; R 1 is an n-valent organic radical; R 2 is hydrogen, hydrocarbyl or inertly-substituted hydrocarbyl; R 3 and R 4 are each independently hydrogen, hydrocarbyl, inertly-substituted hydrocarbyl, or, R 3 and R 4 are joined to form a 5- or 6-membered carbocyclic ring. The catalysts are delayed-action, heat-activated catalysts which are particularly useful in the preparation of polyurethanes.
Inventors
- 👤 Philip W. McGraw
- 👤 George A. Doorakian
- 👤 Randall C. Rains
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:00
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/18; C08G18/20; C08G18/2009; C08G18/2027; C08G18/166; C08G18/168
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
107 words
A composition comprising a. an organic compound bearing at least one reactive isocyanato group; b. an organic compound bearing active hydrogen; and c. a small but sufficient amount of a catalyst to catalyze the reaction between the isocyanato group in (a) and the active hydrogen in (b); said catalyst corresponding to the formula ##STR46## wherein: n is an integer of from 1 to 3; R 1 is an n-valent organic radical R 2 is hydrogen, hydrocarbyl or inertly-substituted hydrocarbyl; R 3 and R 4 are each independently hydrogen, hydrocarbyl, inertly-substituted hydrocarbyl, or, R 3 and R 4 are joined to form a 5- or 6-membered carbocylic ring.
Claim 2
Dependent Claim
107 words
A composition comprising a. an organic compound bearing at least one reactive isocyanato group; b. an organic compound bearing active hydrogen; and c. a small but sufficient amount of a catalyst to catalyze the reaction between the isocyanato group in (a) and the active hydrogen in (b); said catalyst corresponding to the formula ##STR46## wherein: n is an integer of from 1 to 3; R 1 is an n-valent organic radical R 2 is hydrogen, hydrocarbyl or inertly-substituted hydrocarbyl; R 3 and R 4 are each independently hydrogen, hydrocarbyl, inertly-substituted hydrocarbyl, or, R 3 and R 4 are joined to form a 5- or 6-membered carbocylic ring.
Claim 3
Dependent Claim
17 words
The composition defined by claim 1 in which (b) is an organic compound bearing alcoholic hydroxyl groups.
Claim 4
Dependent Claim
19 words
The composition defined by claim 1 in which (a) is an organic polyisocyanate and (b) is an aliphatic polyol.
Claim 5
Dependent Claim
17 words
The composition defined by claim 3 in which (b) is a polyether polyol or a polyester polyol.
Claim 6
Dependent Claim
29 words
The composition defined by claim 1 in which R 1 is an n-valent carbocyclic aromatic ring or an inertly-substituted n-valent carbocyclic aromatic ring having at least 6 carbon atoms.
Claim 7
Dependent Claim
22 words
The composition defined by claim 5 in which R 1 is phenyl or an inertly-substituted phenyl and n is 1 or 2.
Claim 8
Dependent Claim
14 words
The composition defined by claim 5 in which R 1 is phenyl or tolyl.
Claim 9
Dependent Claim
21 words
The composition defined by claim 1 in which R 3 and R 4 are each hydrogen and R 2 is methyl.
Claim 10
Dependent Claim
35 words
The composition defined by claim 7 in which R 1 corresponds to the formula ##STR47## (a) is an organic polyisocyanate having from 2 to 4 isocyanato groups per molecule; and (b) is an aliphatic polyol.
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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) | 1980-08-08 | 1981-02-07 | 1981-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-08 | 1985-02-07 | 1985-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-08 | 1989-02-07 | 1989-08-09 | $7700.00 | Window Closed / Lapsed |