Patent US4812496A successfully refreshed from Google Patents.
US4812496A
Expired / Lapsed
US
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Latex based adhesive composition for paperboard and corrugated board
Assignee: Dow Chemical Co
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Filing: 1987-01-27
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Granted: 1989-03-14
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Expires: 2007-01-27
Abstract
Abstract An adhesive of starch and an ammonium-based latex improves wet-pin adhesion for paperboard and corrugated board. The latexes are typical styrene-butadiene and carboxylated styrene-butadiene latexes but untypically are polymerized in the presence of a volatile base such as ammonium hydroxide.
Inventors
- 👤 Arthur N. Leadbetter
- 👤 James G. Galloway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:33
CPC Classifications
D; D21; D21H; D21H27/00; D21H27/30; D21H27/40; C; C09; C09J; C09J103/00; C09J103/02; C09J107/00; C09J107/02; C09J109/00; C09J109/06; C09J109/08; C09J113/00; C09J113/02; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/26
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
18 words
An aqueous adhesive comprising: (a) starch; and (b) a polymer latex prepared in the presence of ammonium hydroxide.
Claim 2
Dependent Claim
18 words
An aqueous adhesive comprising: (a) starch; and (b) a polymer latex prepared in the presence of ammonium hydroxide.
Claim 3
Dependent Claim
12 words
The adhesive of claim 1 wherein said latex is an isopropenyl-2-oxazoline-modified latex.
Claim 4
Dependent Claim
50 words
The adhesive of claim 1 wherein said starch is present in an amount of from about 20 to about 95 dry parts per hundred parts dry adhesive and said ammonium-based latex is present in an amount of from about 80 to about 5 dry parts per hundred parts dry adhesive.
Claim 5
Dependent Claim
22 words
The adhesive of claim 1 wherein the ammonium-based latex is selected from the group consisting of styrene-butadiene latex or carboxylated styrene-butadiene latex.
Claim 6
Dependent Claim
13 words
The adhesive of claim 1 wherein said latex is an isopropenyl-2-oxazoline-modified styrene-butadiene latex.
Claim 7
Dependent Claim
29 words
The adhesive of claim 5 wherein said isopropenyl-2-oxazoline is present in an amount of from about 0.25 to about 10 parts by weight based on 100 parts polymer latex.
Claim 8
Dependent Claim
29 words
The adhesive of claim 6 wherein said isopropenyl-2-oxazoline is present in an amount of from about 1 to about 2 parts by weight based on 100 parts polymer latex.
Claim 9
Dependent Claim
20 words
An aqueous adhesive consisting essentially of: (a) starch; and (b) a polymer latex prepared in the presence of ammonium hydroxide.
Claim 10
Dependent Claim
20 words
An aqueous adhesive consisting essentially of: (a) starch; and (b) a polymer latex prepared in the presence of ammonium hydroxide.
References Cited (Backward Citations)
US3247040A
Cited
US4018959A
Cited
US3985937A
Cited
US4339364A
Cited
US4396453A
Cited
US4471082A
Cited
US4561918A
Cited
US4508869A
Cited
US4568714A
Cited
US4585501A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-03-13 | 1992-09-12 | 1993-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-13 | 1996-09-12 | 1997-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-13 | 2000-09-12 | 2001-03-14 | $7700.00 | Window Closed / Lapsed |