US4590224A
Expired / Lapsed
US
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Siloxane-containing polyisocyanurate
Assignee: Dow Chemical Co
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Filing: 1984-08-20
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Granted: 1986-05-20
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Expires: 2004-08-20
Abstract
Abstract Siloxane modified isocyanurate polymers are disclosed which are the reaction product of a siloxane containing polyahl and a polyisocyanate in the presence of a catalyst for a trimerization of the isocyanate to form isocyanurate rings.
Inventors
- 👤 Kurt C. Frisch, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:06
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/61; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/7806; C08G18/7818; C08G18/7831; C08G18/79; C08G18/791; C08G2110/00; C08G2110/0008; C08G2110/0025; C08G2110/0083; C08G2115/00; C08G2115/02; C08G2120/00
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
76 words
A siloxane-modified isocyanurate polymer comprising the reaction product of a reaction mixture comprising (a) a siloxane-containing polyahl having at least 2 primary or secondary amine groups or hydroxyl groups other than Si--O--H groups per molecule or a polyahl mixture comprising said siloxane-containing polyahl in an amount such that such mixture contains at least about 10% by weight of siloxane groups, (b) a polyisocyanate and (c) a catalyst for the trimerization of isocyanate groups to isocyanurate groups.
Claim 2
Dependent Claim
76 words
A siloxane-modified isocyanurate polymer comprising the reaction product of a reaction mixture comprising (a) a siloxane-containing polyahl having at least 2 primary or secondary amine groups or hydroxyl groups other than Si--O--H groups per molecule or a polyahl mixture comprising said siloxane-containing polyahl in an amount such that such mixture contains at least about 10% by weight of siloxane groups, (b) a polyisocyanate and (c) a catalyst for the trimerization of isocyanate groups to isocyanurate groups.
Claim 3
Dependent Claim
76 words
The siloxane-modified isocyanurate polymer of claim 1 wherein the siloxane-containing polyahl is represented by the structure ##STR6## wherein n is an integer from about 1 to 10,000, each R is independently hydrogen, lower alkyl, benzyl or phenyl, Y is a covalent bond, --O--, --S--, --COO-- or other linking group, m is 0 or 1, X is a functional group containing at least 1 active hydrogen atom and each R' is independently an inertly substituted organic diradical.
Claim 4
Dependent Claim
17 words
The siloxane modified isocyanurate of claim 2 wherein each X is hydroxyl, primary amine or secondary amine.
Claim 5
Dependent Claim
21 words
The siloxane modified isocyanurate polymer of claim 3 wherein m is 0, Y is --O-- and R' is a poly(oxyalkylene) chain.
Claim 6
Dependent Claim
23 words
The siloxane modified isocyanurate polymer of claim 4 wherein the poly(oxyalkylene) chain is a polymer of ethylene oxide, propylene oxide or mixture thereof.
Claim 7
Dependent Claim
23 words
The siloxane modified isocyanurate of claim 4 wherein the siloxane-containing polyahl has a siloxane content of about 25 to 95 percent by weight.
Claim 8
Dependent Claim
28 words
The siloxane modified isocyanurate polymer of claim 2 wherein the polyahl mixture contains from about 25 to 100 percent by weight of the mixture of said siloxane-containing polyahl.
Claim 9
Dependent Claim
15 words
The siloxane modified isocyanurate polymer of claim 1 wherein the polyisocyanate is an aromatic polyisocyanate.
Claim 10
Dependent Claim
15 words
The siloxane modified isocyanurate polymer of claim 8 wherein the aromatic polyisocyanate is tolylene diisocyanate.
Claim 11
Dependent Claim
17 words
The siloxane modified isocyanurate polymer of claim 8 wherein the aromatic polyisocyanate is a methylene-bridged polyphenyl polyisocyanate.
Claim 12
Dependent Claim
15 words
The siloxane modified isocyanurate polymer of claim 1 wherein the polyisocyanate is an aliphatic polyisocyanate.
Claim 13
Dependent Claim
27 words
The siloxane modified isocyanurate polymer of claim 1 wherein the polyisocyanate is employed in an amount such that the isocyanate index is from about 80 to 400.
Claim 14
Dependent Claim
25 words
The siloxane modified isocyanurate polymer of claim 1 wherein the polyisocyanate is employed in an amount such that the isocyanate index is from about 400-700.
Claim 15
Dependent Claim
26 words
The siloxane modified isocyanurate of claim 1 wherein the polyisocyanate is employed in the amount such that the isocyanate index is from about 700 to 2,000.
Claim 16
Dependent Claim
17 words
The siloxane modified isocyanurate polymer of claim 1 wherein the reaction mixture further comprises a blowing agent.
Claim 17
Dependent Claim
16 words
The siloxane modified isocyanurate of claim 1 wherein the reaction mixture further comprises a chain extender.
Claim 18
Dependent Claim
10 words
A film comprising the siloxane modified isocyanurate of claim 1.
Claim 19
Dependent Claim
11 words
A foam comprising the siloxane modified isocyanurate polymer of claim 15.
Claim 20
Dependent Claim
11 words
An elastomer comprising the siloxane modified isocyanurate polymer of claim 1.
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) | 1989-05-19 | 1989-11-18 | 1990-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-19 | 1993-11-18 | 1994-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-19 | 1997-11-18 | 1998-05-20 | $7700.00 | Window Closed / Lapsed |