US3668166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyvinyl alcohol adhesives
Assignee: EIDP Inc
•
Filing: 1970-02-25
•
Granted: 1972-06-06
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Expires: 1990-02-25
Abstract
Abstract The invention relates to polyvinyl alcohol compositions and aqueous adhesives formed therefrom which are characterized by improved rheological properties. The employment of polyvinyl alcohol having a 4 percent aqueous solution viscosity in the range of about 1 to 16 centipoises in aqueous tackified adhesive systems provides significant and unexpected improvement in flow properties.
Inventors
- 👤 Thomas G Kane
- 👤 William D Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:02
CPC Classifications
C; C09; C09J; C09J129/00; C09J129/02; C09J129/04; C08; C08L; C08L2666/00; C08L2666/28; C08L2666/54
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
14 words
A dry blend according to claim 1 wherein said boron compound is boric acid.
Claim 2
Dependent Claim
41 words
A dry blend according to claim 2 including a member of the group consisting of hexamethylenetetramine, triethylenediamine and mixtures thereof, from an amount effective to improve quick tack of said adhesive to an amount less than that at which gelling occurs.
Claim 3
Dependent Claim
51 words
A dry blend according to claim 3 wherein the amount of said boric acid is in the range of 1 to 7 percent by weight of said polyvinyl alcohol and the amount of said group member is in the range of 0.7 to 12 percent by weight of said boric acid.
Claim 4
Dependent Claim
51 words
A dry blend according to claim 3 wherein the amount of said boric acid is in the range of 2 to 6 percent by weight of said polyvinyl alcohol and the amount of said group member is in the range of 3 to 7 percent by weight of said boric acid.
Claim 5
Dependent Claim
43 words
A dry blend according to claim 3 wherein the amount of said boric acid is about 5.5 percent by weight of said polyvinyl alcohol and said group member is hexamethylenetetramine in an amount of about 6 percent by weight of said boric acid.
Claim 6
Dependent Claim
28 words
A dry blend according to claim 6 wherein said polyvinyl alcohol is characterized by a 4 percent aqueous solution viscosity at 20* C. between 12 and 14 centipoises.
Claim 7
Dependent Claim
14 words
A polyvinyl alcohol adhesive comprising an aqueous solution of the blend of claim 1.
Claim 8
Dependent Claim
14 words
A polyvinyl alcohol adhesive comprising an aqueous solution of the blend of claim 3.
Claim 9
Dependent Claim
28 words
A polyvinyl alcohol adhesive comprising an aqueous solution of the blend of claim 4, said polyvinyl alcohol comprising about 4 to 20 percent by weight of said solution.
Claim 10
Dependent Claim
19 words
An adhesive according to claim 8 including clAy filler in an amount compatible with pseudoplastic flow of the adhesive.
Claim 11
Dependent Claim
25 words
An adhesive according to claim 9 including a clay filler in an amount equal to 20 to 700 percent by weight of said polyvinyl alcohol.
Claim 12
Dependent Claim
25 words
An adhesive according to claim 10 including a clay filler in an amount equal to 20 to 700 percent by weight of said polyvinyl alcohol.
Claim 13
Dependent Claim
25 words
An adhesive according to claim 10 including a clay filler in an amount equal to 200 to 400 percent by weight of said polyvinyl alcohol.
References Cited (Backward Citations)
US3087920A
Cited
US3320200A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |