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Patent US4442252A successfully refreshed from Google Patents.
US4442252A
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Cold-set adhesive compositions comprising polyvinyl alcohol for paper and paper board
Assignee: Okayama Paper Mill Co Ltd
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Filing: 1982-04-08
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Granted: 1984-04-10
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Expires: 2002-04-08
Abstract
Abstract Adhesives prepared by dissolving polyvinyl alcohol, a filler and a water-soluble boron compound in water are described. These adhesives are "cold-set" adhesives which are liquid at a temperature of 60° C. or more, but lose their fluidity to gelatinize on cooling at a temperature higher than 20° C., they are very useful for a cold corrugation system.
Inventors
- 👤 Masao Sumi
- 👤 Junichi Suenaga
- 👤 Masazo Takenaka
- 👤 Itaru Murano
- 👤 Mikio Tanabe
- 👤 Kiyoshi Hirai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:41
CPC Classifications
B; B32; B32B; B32B3/00; B32B3/26; B32B3/28; B31; B31F; B31F1/00; B31F1/20; B31F1/24; B31F1/26; B31F1/28; B31F1/2804; B31F1/2809; B32B29/00; B32B29/002; B32B29/005; B32B7/00; B32B7/04; B32B7/12; C; C09; C09J; C09J129/00; C09J129/02; C09J129/04; D; D21; D21H; D21H27/00; D21H27/30; D21H27/40; B32B2317/00; B32B2317/12; C08; C08L; C08L2666/00; C08L2666/54
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
94 words
A cold-set adhesive for paper having a viscosity of from about 100 to 2,000 centipoises at 60° C. and which gelatinizes upon cooling at a temperature higher than 20° C. and consisting essentially of polyvinyl alcohol, a filler which exhibits alkalinity in an aqueous dispersion, a water-soluble boron compound, and water, the mixing ratio by weight of polyvinyl alcohol to filler being from about 20/80 to 70/30 and the amount of the water-soluble boron compound being from about 0.2 to 4 parts by weight per 100 parts by weight of polyvinyl alcohol plus filler.
Claim 2
Dependent Claim
94 words
A cold-set adhesive for paper having a viscosity of from about 100 to 2,000 centipoises at 60° C. and which gelatinizes upon cooling at a temperature higher than 20° C. and consisting essentially of polyvinyl alcohol, a filler which exhibits alkalinity in an aqueous dispersion, a water-soluble boron compound, and water, the mixing ratio by weight of polyvinyl alcohol to filler being from about 20/80 to 70/30 and the amount of the water-soluble boron compound being from about 0.2 to 4 parts by weight per 100 parts by weight of polyvinyl alcohol plus filler.
Claim 3
Dependent Claim
18 words
An adhesive according to claim 1 having a viscosity of from 100 to 1,000 centipoises at 60° C.
Claim 4
Dependent Claim
21 words
An adhesive according to claim 1 wherein the polyvinyl alcohol has a degree of hydrolysis of about 97 mol% or more.
Claim 5
Dependent Claim
13 words
An adhesive according to claim 1 wherein the filler is an inorganic filler.
Claim 6
Dependent Claim
11 words
An adhesive according to claim 1 wherein the filler is talc.
Claim 7
Dependent Claim
24 words
An adhesive according to claim 4 wherein the inorganic filler is selected from the group consisting of, aluminium hydroxide, magnesium oxide, and magnesium hydroxide.
Claim 8
Dependent Claim
13 words
An adhesive according to claim 4 wherein the inorganic filler is calcium carbonate.
Claim 9
Dependent Claim
15 words
An adhesive according to claim 1 wherein the water-soluble boron compound is a boric acid.
Claim 10
Dependent Claim
14 words
An adhesive according to claim 1 wherein the water-soluble boron compound is a borate.
Claim 11
Dependent Claim
11 words
An adhesive according to claim 9 wherein the borate is borax.
Claim 12
Dependent Claim
16 words
An adhesive according to claim 1 wherein the water-soluble boron compound is a boric acid ester.
Claim 13
Dependent Claim
20 words
An adhesive according to claim 1 wherein the filler is calcium carbonate and the water-soluble boron compound is boric acid.
Claim 14
Dependent Claim
44 words
An adhesive according to claim 1, 3, 4, 5, 7, 8, 9, 10, 11, 12, 13 or 14 wherein the amount of the water-soluble boron compound is from 0.3 to 2 parts by weight per 100 parts by weight of polyvinyl alcohol and filler.
References Cited (Backward Citations)
US3632786A
Cited
US3632362A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-10 | 1987-10-10 | 1988-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-10 | 1991-10-10 | 1992-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-10 | 1995-10-10 | 1996-04-10 | $7700.00 | Window Closed / Lapsed |