Patent US4320221A successfully refreshed from Google Patents.
US4320221A
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US
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Addition polymerizable isocyanate-polyol anaerobic adhesives
Assignee: Dow Chemical Co
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Filing: 1980-12-12
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Granted: 1982-03-16
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Expires: 2000-12-12
Abstract
Abstract The reaction product of an ethylenically unsaturated, monofunctional isocyanate, such as isocyanatoethyl methacrylate and a difunctional active hydrogen containing compound such as a polyol is useful as an anaerobic adhesive.
Inventors
- 👤 Dwight K. Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:18
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/81; C08G18/8108; C09; C09J; C09J4/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
35 words
An adhesive comprising: (a) the reaction product of: (1) an addition polymerizable ethylenically unsaturated isocyanate and (2) a polyahl; (b) a curing amount of a polymerization initiator; and (c) a stabilizing amount of an inhibitor.
Claim 2
Dependent Claim
35 words
An adhesive comprising: (a) the reaction product of: (1) an addition polymerizable ethylenically unsaturated isocyanate and (2) a polyahl; (b) a curing amount of a polymerization initiator; and (c) a stabilizing amount of an inhibitor.
Claim 3
Dependent Claim
45 words
The adhesive of claim 1 wherein the ethylenically unsaturated isocyanate has the formula: ##STR3## wherein R 1 is a hydrogen or a carbon chain of from 1 to 5 carbon atoms and R 2 is a carbon chain of from 1 to 7 carbon atoms.
Claim 4
Dependent Claim
16 words
The adhesive of claim 2 wherein the ethylenically unsaturated isocyanate is 2-isocyanatoethyl methacrylate or 2-isocyanatoethyl acrylate.
Claim 5
Dependent Claim
16 words
The adhesive of claim 1, 2 or 3 wherein the polymerization initiator is a free-radical initiator.
Claim 6
Dependent Claim
13 words
The adhesive of claim 4 wherein the polymerization initiator is a peroxygen compound.
Claim 7
Dependent Claim
15 words
The adhesive of claim 5 wherein the polymerization initiator is an organic peroxide or hydroperoxide.
Claim 8
Dependent Claim
26 words
A method of bonding substrates at a bond site comprising placing the adhesive of claim 1 at the bond site so as to form a bond.
Claim 9
Dependent Claim
45 words
The method of claim 7 wherein the ethylenically unsaturated isocyanate has the formula: ##STR4## wherein R 1 is a hydrogen or a carbon chain of from 1 to 5 carbon atoms and R 2 is a carbon chain of from 1 to 7 carbon atoms.
Claim 10
Dependent Claim
16 words
The method of claim 7 wherein the ethylenically unsaturated isocyanate is 2-isocyanatoethyl methacrylate or 2-isocyanatoethyl acrylate.
Claim 11
Dependent Claim
19 words
The method of claim 7, 8 or 9 including the additional step of removing oxygen from the bond site.
Claim 12
Dependent Claim
19 words
The method of claim 7, 8 or 9 including the additional step of applying pressure to the bond site.
Claim 13
Dependent Claim
14 words
The adhesive of claim 1, 2 or 3 wherein the polyahl is a polyol.
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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) | 1985-03-15 | 1985-09-14 | 1986-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-15 | 1989-09-14 | 1990-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-15 | 1993-09-14 | 1994-03-16 | $7700.00 | Window Closed / Lapsed |