Patent EP0070475A2 successfully refreshed from Google Patents.
EP0070475A2
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Method of making a moisture-curable silicon terminated polymer
Assignee: Essex Chemical Corp
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Filing: 1982-07-09
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Granted: —
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Expires: 2002-07-09
Abstract
Abstract The method comprises reacting a polyurethane prepolymer having terminal active hydrogen atoms with an isocyanato organosilane having a terminal isocyanate group and at least one hydrolyzable alkoxy group bonded to silicon. The moisture-curable polymer obtained by this method can advantageously be used in sealant compositions. The polymer presents a very rapid cure rate in the presence of moisture, and it is stable under unhydrous conditions.
Inventors
- 👤 Sidky D. Rizk
- 👤 Harry W.S. Hsieh
- 👤 John J. Prendergast
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 18:37
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/10; C09K3/1006; C09K3/1021; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/70; C08G18/71; C08G18/718; C09K2003/1034; C09K2003/1056
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
41 words
A method of making a moisture-curable silicon terminated polymer, characterized in that a polyurethane prepolymer having terminal active hydrogen atoms is reacted with an isocyanato organosilane having a terminal isocyanate group and at least one hydrolyzable alkoxy group bonded to silicon.
Claim 2
Independent Claim
41 words
A method of making a moisture-curable silicon terminated polymer, characterized in that a polyurethane prepolymer having terminal active hydrogen atoms is reacted with an isocyanato organosilane having a terminal isocyanate group and at least one hydrolyzable alkoxy group bonded to silicon.
Claim 3
Dependent Claim
24 words
A method as claimed in Claim 1, characterized in that the isocyanato organosilane has from one to three hydrolyzable alkoxy groups bonded to silicon.
Claim 4
Dependent Claim
64 words
A method as claimed in Claim 1, characterized in that the isocyanato organosilane is a compound of the formula OCN R-Si-(X) m (R') (3-m) wherein R is a divalent organic radical, R' is hydrogen or alkyl having 1 to 4 carbon atoms, X is an hydrolyzable alkoxy group having from 1 to 4 carbon atoms, and m is an integer from 1 to 3.
Claim 5
Dependent Claim
16 words
A method as claimed in Claim 1, characterized in that the isocyanate organosilane is gamma-isocyanatopropyl triethoxysilane.
Claim 6
Independent Claim
26 words
A method as claimed in any one of Claims 1 to 4, characterized in that the polyurethane prepolymer has terminal -OH, -SH, or -NH 2 groups.
Claim 7
Independent Claim
36 words
A method as claimed in any one of Claims 1 to 4, characterized in that the polyurethane prepolymer has terminal -OH groups and is prepared by reacting an excess of a polyol with an organic polyisocyanate.
Claim 8
Dependent Claim
16 words
A method as claimed in Claim 6, characterized in that the polyol is a polyether palyol.
Claim 9
Dependent Claim
17 words
A method as claimed in Claim 7, characterized in that the polyether polyol is a polyether diol.
Claim 10
Dependent Claim
17 words
A method as claimed in Claim 8, characterized in that the polyether diol is a polyoxyalkylene diol.
Claim 11
Dependent Claim
24 words
A method as claimed in Claim 7, characterized in that the polyether polyol is a mixture of a polyether diol and a pdyether triol.
Claim 12
Dependent Claim
25 words
A method as claimed in Claim 10, characterized in that the polyether diol is a polyoxyalkylene diol and the polyether triol is a polyoxyalkylene triol.
Claim 13
Independent Claim
50 words
A method as claimed in any one of Claims 1 to 4, characterized in that the polyurethane prepolymer has terminal -OH groups and also has urea groups within the polymer chain and is prepared by reacting an excess of a mixture of a polyol and water with an organic polyisocyanate.
Claim 14
Dependent Claim
27 words
A method as claimed in Claim 12, characterized in that up to 25 percent of the total hydroxyl equivalents in said mixture are present in the water.
Claim 15
Dependent Claim
16 words
A method as claimed in Claim 6, characterized in that the polyol is a polyester polyol.
Claim 16
Dependent Claim
17 words
A method as claimed in Claim 14, characterized in that the polyester polyol is a polyester diol.
Claim 17
Dependent Claim
18 words
A method as claimed in Claim 15, characterized in that the polyester diol is a polyalkanol- actone diol.
Claim 18
Dependent Claim
18 words
A moisture-curable silicon terminated organic polymer made by the method of any one of Claims 1 to 16.
Claim 19
Dependent Claim
30 words
A moisture-curable sealant composition comprising a moisture-curable silicon terminated organic polymer made by the method of any one of Claims 1 to 16 in combination with a least one filler.
Claim 20
Dependent Claim
23 words
A sealant composition as claimed in Claim 18, characterized in that it additionally comprises a curing catalyst for the silicon terminated organic polymer.
Claim 21
Dependent Claim
18 words
A sealant composition as claimed in Claim 19, characterized in that the catalyst is a quaternary ammonium hydroxide.
Claim 22
Dependent Claim
16 words
A sealant composition as claimed in Claim 20, characterized in that the catalyst is benzyltrimethylammonium hydroxide.
Claim 23
Dependent Claim
27 words
A sealant composition as claimed in Claim 18, characterized in that it additionally comprises an amino organosilane having at least one hydrolyzable alkoxy group bonded to silicon.
Claim 24
Dependent Claim
17 words
A sealant composition as claimed in Claim 22, characterized in that the amino organosilane is N-(beta-aminoethyl)-gamma-aminopropyl-trimethoxy silane.
Claim 25
Dependent Claim
18 words
A sealant composition as claimed in Claim 22, characterized in that the amino organosilane is N-(beta-aminoethyl),N'-(gamma-trimethoxysilyl propyl)--ethylene diamine.
References Cited (Backward Citations)
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