US4645816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel vulcanizable silane-terminated polyurethane polymers
Assignee: General Electric Co
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Filing: 1985-06-28
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Granted: 1987-02-24
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Expires: 2005-06-28
Abstract
Abstract Room-temperature curable isocyanate terminated polyurethane polymers whose terminal isocyanate groups have been reacted with a silane monomer having at least one dialkoxy silane group and an organo-functional group with at least one active hydrogen. The polymers crosslink to produce elastomeric polymers with improved elongation and flexibility.
Inventors
- 👤 Eric R. Pohl
- 👤 Frederick D. Osterholtz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:11
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/10; C09K3/1006; C09K3/1021; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; Y; Y10; Y10S; Y10S528/00; Y10S528/906
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
139 words
A process for producing vulcanizable, dihydrocarbyloxysilyl-terminated polyurethane polymers having terminal end-blocking units of the formula: ##STR7## wherein R is C 1 -C 16 alkyl or C 6 -C 12 aryl; R 1 is C 1 -C 4 alkyl; R 2 is C 2 -C 18 alkylene or C 6 -C 18 arylene; and Z is --O--, --S-- or --NR 3 , wherein R 3 is hydrogen, ##STR8## or C 1 -C 16 alkyl, aminoalkyl or diaminoalkyl, with the proviso that when Z is --O--, R 2 must be C 4 -C 18 alkylene or C 6 -C 18 arylene, which comprises reacting: (a) the --NCO terminal groups of an isocyanate-terminated polyurethane prepolymer with (b) at least a stoichiometric amount of silane monomer of the formula: ##STR9## wherein R, R 1 , R 2 and Z are as defined above.
Claim 2
Dependent Claim
139 words
A process for producing vulcanizable, dihydrocarbyloxysilyl-terminated polyurethane polymers having terminal end-blocking units of the formula: ##STR7## wherein R is C 1 -C 16 alkyl or C 6 -C 12 aryl; R 1 is C 1 -C 4 alkyl; R 2 is C 2 -C 18 alkylene or C 6 -C 18 arylene; and Z is --O--, --S-- or --NR 3 , wherein R 3 is hydrogen, ##STR8## or C 1 -C 16 alkyl, aminoalkyl or diaminoalkyl, with the proviso that when Z is --O--, R 2 must be C 4 -C 18 alkylene or C 6 -C 18 arylene, which comprises reacting: (a) the --NCO terminal groups of an isocyanate-terminated polyurethane prepolymer with (b) at least a stoichiometric amount of silane monomer of the formula: ##STR9## wherein R, R 1 , R 2 and Z are as defined above.
Claim 3
Dependent Claim
29 words
A process as recited in claim 1 wherein R is C 1 -C 16 alkyl; R 2 is C 2 -C 8 alkylene; and Z is --S-- or NH.
Claim 4
Dependent Claim
25 words
A process as recited in claim 2 wherein R and R 1 are methyl or ethyl: R2 is ethylene or propylene; and Z is NH.
Claim 5
Dependent Claim
12 words
A process as recited in claim 3 wherein the silane is gammaaminopropyldimethoxymethylsilane.
Claim 6
Dependent Claim
22 words
A process as recited in claim 1 wherein the polyurethane prepolymer is the reaction product of polyoxyalkylene diol and an aromatic diisocyanate.
Claim 7
Dependent Claim
21 words
The process as recited in claim 5 wherein the polyoxyalkylene diol is polyoxyalkylene glycol and the aromatic diisocyanate is toluene diisocyanate.
Claim 8
Dependent Claim
14 words
The process as recited in claim 6 wherein the polyoxyalkylene glycol is polypropylene glycol.
Claim 9
Dependent Claim
34 words
The process as recited in claim 1 further comprising admixing with said polyurethane prepolymer and said silane monomer a silanol condensation catalyst in an amount sufficient to cure the polymer upon exposure to moisture.
Claim 10
Dependent Claim
20 words
The process as recited in claim 1 further comprising admixing a filler with said polyurethane prepolymer and said silane monomer.
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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) | 1990-02-23 | 1990-08-25 | 1991-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-23 | 1994-08-25 | 1995-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-23 | 1998-08-25 | 1999-02-24 | $7700.00 | Window Closed / Lapsed |