US4812496A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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 16:56
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.
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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) | 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 |