US3676402A
Expired / Lapsed
US
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Low-temperature curable blocked isocyanate compositions containing a stannoxane catalyst
Assignee: Takeda Pharmaceutical Co Ltd
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Filing: 1970-10-29
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Granted: 1972-07-11
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Expires: 1990-10-29
Abstract
Abstract Octaalkyl-stannoxanes are provided herein which permit regeneration of an isocyanate group in a blocked isocyanate compound at a lower temperature than previously possible. The resulting compounds with the regenerated isocyanante groups are useful, e.g., in the preparation of urethane resin in the conventional manner.
Inventors
- 👤 Yutaka Matsui
- 👤 Noritoshi Mise
- 👤 Jugo Goto
- 👤 Makoto Yokoo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:29
CPC Classifications
C; C07; C07C; C07C263/00; C07C263/16; C07C265/00; C07C265/14; C07F; C07F7/00; C07F7/22; C07F7/2224; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/16; C08G18/22; C08G18/24; C08G18/242; C08G18/70; C08G18/72; C08G18/80; C08G18/8061; Y; Y10; Y10S; Y10S528/00; Y10S528/905; Y10S528/906
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
90 words
A low temperature-curable polyurethane forming composition comprising, as three essential ingredients, (a) a blocked organic polyisocyanate, (b) a stannoxane of the formula wherein X1 is a member selected from the group consisting of halogen,OH, lower alkoxy, carboxylic acid acyloxy, -NCO and -NCS; X2 is a member selected from the group consisting of -OH, lower alkoxy, carboxylic acid acyloxy, -NCO and -NCS; and each of R1, R2, R3 and R4 is lower alkyl; and (c) an additional compound containing active hydrogen atoms; the blocked polyisocyanate compound having no free isocyanate groups.
Claim 2
Dependent Claim
15 words
A composition as claimed in claim 1, wherein each of X1 and X2 is NCO.
Claim 3
Dependent Claim
15 words
A composition as claimed in claim 1, wherein each of X1 and X2 is NCS.
Claim 4
Dependent Claim
12 words
A composition as claimed in claim 1, wherein the stannoxane is octapropyl-dichloro-dihydroxy-stannoxane.
Claim 5
Dependent Claim
12 words
A composition as claimed in claim 1, wherein the stannoxane is octabutyl-tetraformyloxy-stannoxane.
Claim 6
Dependent Claim
12 words
A composition as claimed in claim 1, wherein the stannoxane is octamethyl-tetraacetoxy-stannoxane.
Claim 7
Dependent Claim
12 words
A composition as claimed in claim 1, wherein the stannoxane is octabutyl-tetraisothiocyanato-stannoxane.
Claim 8
Dependent Claim
12 words
A composition as claimed in claim 1, wherein the stannoxane is octabutyl-tetraacetoxy-stannoxane.
Claim 9
Dependent Claim
12 words
A composition as claimed in claim 1 wherein the stannoxane is octabutyl-tetraacryloyloxy-stannoxane.
Claim 10
Dependent Claim
12 words
A composition as claimed in claim 1, wherein the stannoxane is octabutyl-tetracyanoacetoxy-stannoxane.
Claim 11
Dependent Claim
12 words
A composition as claimed in claim 1, wherein the stannoxane is octabutyl-tetrabenzyloyloxy-stannoxane.
Claim 12
Dependent Claim
12 words
A composition as claimed in claim 1 wherein the stannoxane is octabutyl-tetraoleoyloxy-stannoxane.
Claim 13
Dependent Claim
12 words
A composition as claimed in claim 1, wherein the stannoxane is octabutyl-tetramaleoyloxy-stannoxane.
Claim 14
Dependent Claim
12 words
A composition as claimed in claim 1, wherein the stannoxane is octabutyl-tetraisocyanato-stannoxane.
Claim 15
Dependent Claim
12 words
A composition as claimed in claim 1, wherein the stannoxane is octabutyl-tetramethoxy-stannoxane.
Claim 16
Dependent Claim
64 words
A composition as claimed in claim 1, wherein the blocked polyisocyanate compound is the reaction product of a blocking agent and an isocyanate terminated compound which is obtained by reacting an excess of a polyisocyanate with a polyol having a molecular weight of from about 300 about 3,000, the polyol being a member selected from the group consisting of polyester polyol and polyether polyol.
Claim 17
Dependent Claim
84 words
A composition as claimed in claim 2, wherein the blocked polyisocyanate compound is the reaction product of a blocking agent and an isocyanate terminated compound which is obtained by reacting an excess of a polyisocyanate with a polyol having a molecular weight of from about 300 to 3,000, and the additional compound containing active hydrogen atoms is a polyol having a molecular weight of from about 300 to about 3,000, each polyol being selected from the group consisting of polyester polyol and polyether polyol.
Claim 18
Dependent Claim
12 words
A composition as claimed in claim 1, wherein said polyisocyanate is aromatic.
Claim 19
Dependent Claim
94 words
A composition as claimed in claim 2, wherein the blocked polyisocyanate compound is the reaction product of a blocking agent and an isocyanate terminated compound which is obtained by reacting an excess of a polyisocyanate with a polyol having a molecular weight of from about 300 to about 3,000, the polyol being a member selected from the group consisting of polyester polyol and polyether polyol, and the additional compound having active hydrogen atoms is a low molecular weight member selected from the group consisting of polyols, aminoalcohols, aromatic primary diamines and aliphatic primary diamines.
Claim 20
Dependent Claim
109 words
A composition as claimed in claim 2, wherein the blocked polyisocyanate compound is the reaction product of (I) a blocking agent with (II) a member selected from the group consisting of (A) a polyisocyanate, and (B) an addition product of (1) a polyisocyanate with (2) a low molecular compound having active hydrogen atoms and selected from the group consisting of (a) polyols, (b) aminoalcohols, (c) aromatic primary diamines and (d) aliphatic primary diamines, and the additional compound containing active hydrogen Atoms is a polyol having a molecular weight of from about 300 to about 3,000 and selected from the group consisting of a polyester polyol and a polyether polyol.
Claim 21
Dependent Claim
22 words
A composition as claimed in claim 20, wherein the additional low molecular compound containing active hydrogen atoms is an aromatic primary diamine.
Claim 22
Dependent Claim
12 words
A composition as claimed in claim 18, wherein the polyisocyanate is aromatic.
Claim 23
Dependent Claim
11 words
A composition as claimed in 20, wherein the polyisocyanate is aromatic.
Claim 24
Dependent Claim
12 words
A composition as claimed in claim 21, wherein the polyisocyanate is aromatic.
References Cited (Backward Citations)
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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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |