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Patent US4728710A successfully refreshed from Google Patents.
US4728710A
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Sag resistant urethane adhesives with improved antifoaming property
Assignee: Ashland LLC
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Filing: 1986-11-28
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Granted: 1988-03-01
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Expires: 2006-11-28
Abstract
Abstract An improved antifoaming two component polyurethane adhesive comprising a first component composed of a polyisocyanate prepolymer and a second component composed of a polyol, a poly amine and a bicyclic amide acetal is described.
Inventors
- 👤 Anil B. Goel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:21
CPC Classifications
C; C09; C09J; C09J175/00; C09J175/04; C09J175/12; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; Y; Y10; Y10S; Y10S528/00; Y10S528/903; Y10S528/905
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
74 words
An improved antifoaming polyurethane adhesive comprising a mixture of a first component comprising a polyisocyanate prepolymer and a second component comprising a polyol, a polyamine and a bicyclic amide acetal wherein in the second component the weight ratio of polyol to polyamine is in the range of from 99.5:0.5% to 70:30% and the bicyclic amide acetal is present in from 0.2 to 5% by weight based on the total weight of polyol and polyamine.
Claim 2
Dependent Claim
74 words
An improved antifoaming polyurethane adhesive comprising a mixture of a first component comprising a polyisocyanate prepolymer and a second component comprising a polyol, a polyamine and a bicyclic amide acetal wherein in the second component the weight ratio of polyol to polyamine is in the range of from 99.5:0.5% to 70:30% and the bicyclic amide acetal is present in from 0.2 to 5% by weight based on the total weight of polyol and polyamine.
Claim 3
Dependent Claim
85 words
The adhesive of claim 1 wherein the bicyclic amide acetal is one having the formula ##STR2## wherein R, R' and R'" independently represent hydrogen, an alkyl or alkyl ether group having from 1 to 20 carbon atoms, an aryl or aryl ether group having from 6 to 20 carbon atoms or an alkaryl group having from 7 to 20 carbon atoms and R" represents an alkyl group having from 1 to 20 carbon atoms or an alkaryl group having from 7 to 20 carbon atoms.
Claim 4
Dependent Claim
27 words
The adhesive of claim 2 wherein the polyisocyanate prepolymer is one obtained by the reaction of a poly (alkylene oxide) diol with an excess of a polyisocyanate.
Claim 5
Dependent Claim
30 words
The adhesive of claim 3 wherein the second component polyol is a mixture of polyether or polyester polyols and the polyamine is a primary or secondary aliphatic or aromatic polyamine.
Claim 6
Dependent Claim
22 words
The adhesive of claim 4 wherein the polyisocyanate prepolymer is prepared from polypropylene diol capped with ethylene oxide and methylene bis(phenyl isocyanate).
Claim 7
Dependent Claim
31 words
The adhesive of claim 5 wherein the second component is comprised of a bicyclic amide acetal in which R, R' and R'" each represents hydrogen and R" represents a methyl group.
Claim 8
Dependent Claim
18 words
The adhesive of Example 6 wherein the second component polyamine is a mixture of piperazine and triethylene diamine.
Claim 9
Dependent Claim
18 words
The adhesive of Example 6 wherein the second component polyamine is a mixture of piperazine and triethylene diamine.
Claim 10
Dependent Claim
14 words
The adhesive of Example 6 wherein the second component comprises piperazine and stannous octoate.
Claim 11
Dependent Claim
14 words
The adhesive of Example 6 wherein the second component comprises piperazine and stannous octoate.
References Cited (Backward Citations)
US4444976A
Cited
US4582890A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-01 | 1991-08-31 | 1992-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-01 | 1995-08-31 | 1996-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-01 | 1999-08-31 | 2000-03-01 | $7700.00 | Window Closed / Lapsed |