US3860673A
Expired / Lapsed
US
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Elastomeric compositions
Assignee: EIDP Inc
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Filing: 1973-07-31
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Granted: 1975-01-14
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Expires: 1993-07-31
Abstract
Abstract Improved elastomeric compositions, useful as adhesives or surface coating compositions, comprise (A) a synthetic or naturally-occurring elastomer, e.g., chloroprene polymer; (B) an organic polyisocyanate, particularly a di-, tri-, or tetraisocyanate, which has been at least partially trimerized, e.g., to an extent of at least 5 percent; and (C) a catalyst which is effective to trimerize (B). The compositions are generally in the form of a two-part system in which the trimerization catalyst and the isocyanate are kept out of mutual contact until just prior to use. A preferred system is one in which the trimerization catalyst and elastomer are incorporated in one pack and the partially trimerized isocyanate is incorporated in another pack, the two packs being present together in a single package which may include mixing instructions.
Inventors
- 👤 John Brian Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:29
CPC Classifications
C; C09; C09D; C09D121/00; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/09; C08G18/092; C08G18/28; C08G18/40; C08G18/62; C08G18/67; C08G18/69; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/29; C09D111/00; C09J; C09J111/00; C09J121/00; C09J175/00; Y; Y10; Y10S; Y10S525/00; Y10S525/939
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
14 words
A composition of claim 1 wherein the polyisocyanate is a di-, tri- or tetraisocyanate.
Claim 2
Dependent Claim
18 words
A composition of claim 1 wherein the polyisocyanate is trimerized to an extent of at least 5 percent.
Claim 3
Dependent Claim
14 words
A composition of claim 1 wherein elastomer (A) is a chloroprene polymer or copolymer.
Claim 4
Dependent Claim
37 words
A composition of claim 1 wherein elastomer (A) is employed as a solution in an organic solvent (D) which has a boiling point such that it readily evaporates when the said composition is applied to a substrate.
Claim 5
Dependent Claim
13 words
A composition of claim 1 wherein the organic polyisocyanate is an aromatic diisocyanate.
Claim 6
Dependent Claim
18 words
A composition of claim 6 wherein the aromatic diisocyanate is tolylene-2,4-diisocyanate or a mixture of tolylene-2,4- and -2,4-diisocyanates.
Claim 7
Dependent Claim
19 words
A composition of claim 1 wherein the polyisocyanate is trimerized to the extent of from 15 to 150 percent.
Claim 8
Dependent Claim
33 words
A composition of claim 1 wherein the polyisocyanate is used in quantities sufficient to supply from 1.0 to 10 percent by weight of free NCO groups based on the weight of elastomer (A).
Claim 9
Dependent Claim
33 words
A composition of claim 9 wherein the polyisocyanate is used in quantities sufficient to supply from 1.5 to 5 percent by weight of free NCO groups based on the weight of elastomer (A).
Claim 10
Dependent Claim
13 words
A composition of claim 1 wherein the catalyst is an aliphatic tertiary amine.
Claim 11
Dependent Claim
28 words
A composition of claim 1 wherein the catalyst is employed in quantities of from 0.01 to 200 percent by weight based on the NCO content of the polyisocyanate.
Claim 12
Dependent Claim
47 words
An elastomeric composition comprising (A) a chloroprene polymer or copolymer; (B) a diisocyanate compound consisting of tolylene-2,4-diisocyanate or a mixture of tolylene-2,4- and -2,6-diisocyanates, the said diisocyanate compound having been trimerized to an extent of 100-140 percent, and (C) a catalyst which is effective to trimerize (B).
Claim 13
Dependent Claim
37 words
A composition as claimed in claim 13 wherein the diisocyanate compound is used in quantities sufficient to supply from 1.5-4 percent by weight of free NCO groups based on the weight of chloroprene polymer or copolymer (A).
Claim 14
Dependent Claim
41 words
A process for the production of an elastomeric composition which comprises homogeneously mixing (A) a synthetic or naturally occurring elastomer; (B) an organic polyisocyanate which has been at least partially trimerized and (C) a catalyst which is effective to trimerize (B).
Claim 15
Dependent Claim
48 words
A pack comprising two containers for use in production of the elastomeric composition of claim 1, one of the said containers containing the catalyst (C) which is effective to trimerize a polyisocyanate (B) and the other containing an organic polyisocyanate (B) which has been at least partially trimerized.
Claim 16
Dependent Claim
20 words
The pack of claim 16 wherein the container for catalyst (C) also contains a naturally occurring or synthetic elastomer (A).
References Cited (Backward Citations)
US3763110A
Cited
US3743617A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |