US4617239A
Expired / Lapsed
US
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Paper coating agent
Assignee: Kuraray Co Ltd
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Filing: 1984-08-30
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Granted: 1986-10-14
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Expires: 2004-08-30
Abstract
Abstract This invention relates to a method of coating paper to improve the surface strength and printability thereof comprising applying to the paper a silicon-containing modified polyvinyl alcohol agent or its saponification product. This method gives outstanding results for printing purposes when coated onto paper objects. This invention also relates to a paper having a silicon-containing polyvinyl alcohol agents coated thereon.
Inventors
- 👤 Hitoshi Maruyama
- 👤 Koichi Kajitani
- 👤 Makoto Shiraishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:54
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/50; B41M5/52; B41M5/26; B41M5/40; B41M5/42; B41M5/44; B41M5/443; B41N; B41N1/00; B41N1/12; B41N1/14; C; C08; C08F; C08F8/00; C08F8/12; C08J; C08J5/00; C08J5/18; D; D21; D21H; D21H19/00; D21H19/10; D21H19/12; B41M5/5254; B41M5/529; C08F218/00; C08F218/02; C08F218/04; C08F218/08; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
69 words
A method of coating paper to improve the surface strength and printability of the paper, comprising applying an effective amount of a silicon-containing modified polyvinyl alcohol to said paper in the form of an alkaline aqueous solution, wherein the silicon-containing modified polyvinyl alcohol is a water soluble product obtained by an alcoholysis of a copolymer of a vinyl ester and an olefinic unsaturated monomer containing silicon in the molecule.
Claim 2
Independent Claim
69 words
A method of coating paper to improve the surface strength and printability of the paper, comprising applying an effective amount of a silicon-containing modified polyvinyl alcohol to said paper in the form of an alkaline aqueous solution, wherein the silicon-containing modified polyvinyl alcohol is a water soluble product obtained by an alcoholysis of a copolymer of a vinyl ester and an olefinic unsaturated monomer containing silicon in the molecule.
Claim 3
Dependent Claim
46 words
The method of claim 1, wherein the olefinic unsaturated monomer containing silicon in the molecule is represented by the formula (I): ##STR19## wherein n is 0 to 4, m is 0 to 2, R 1 is a non-hydrolyzable group, and R 2 is a hydrolyzable group.
Claim 4
Dependent Claim
36 words
The method of claim 2, wherein R 1 is aryl or lower alkyl which may be substituted by aryl; and R 2 is alkoxyl or acyloxyl which may have a substituent group containing oxygen or nitrogen.
Claim 5
Dependent Claim
53 words
The method of claim 2, wherein R 1 is C 6 -C 18 aryl or C 1 -C 5 lower alkyl, which may be substituted by C 6 -C 18 aryl; and R 2 is alkoxyl or acyloxyl of 1 to 40 carbon atoms which may have a substituent containing oxygen or nitrogen.
Claim 6
Dependent Claim
25 words
The method of claim 2, wherein m and n are 0 and 0 to 4, respectively; and R 2 is C 1 -C 40 alkoxyl.
Claim 7
Dependent Claim
21 words
The method of claim 2, wherein both m and n are 0; and R 2 is C 1 -C 18 alkoxyl.
Claim 8
Dependent Claim
25 words
The method of claim 2, wherein m and n are 0 and 0 to 4, respectively, and R 2 is C 2 -C 18 acyloxyl.
Claim 9
Dependent Claim
76 words
The method of claim 1, wherein the olefinic unsaturated monomer has the formula (II): ##STR20## wherein m is 0 to 2; R 1 is a non-hydroylzable group; R 2 is a hydrolyzable group; R 3 is hydrogen or methyl; R 4 is hydrogen or C 1 -C 5 alkyl; and R 5 is C 1 -C 5 alkylene or an organic divalent residue wherein the carbon chain is interrupted by an oxygen atom or nitrogen atom.
Claim 10
Dependent Claim
37 words
The method of claim 8, wherein R 1 is an aryl group or lower alkyl which may be substituted by aryl; and R 2 is alkoxyl or acyloxyl which may have a substituent containing oxygen or nitrogen.
Claim 11
Dependent Claim
52 words
The method of claim 8, wherein R 1 is C 6 -C 18 aryl or C 1 -C 5 alkyl which may be substituted by C 6 -C 18 aryl; and R 2 is alkoxyl or acyloxyl of 1 to 40 carbon atoms which may have a substituent containing oxygen or nitrogen.
Claim 12
Dependent Claim
49 words
The method of claim 8, wherein m is 0; R 1 is C 1 -C 5 alkyl; R 2 is C 1 -C 40 alkoxyl; R 3 is hydrogen or methyl; R 4 is hydrogen or methyl; and R 5 is C 1 -C 5 branched or unbranched alkylene.
Claim 13
Dependent Claim
23 words
The method of claim 1, wherein the modified polyvinyl alcohol contains the silicon-containing monomer unit in an amount of 0.01 to 10 mol%.
Claim 14
Dependent Claim
23 words
The method of claim 1, wherein the modified polyvinyl alcohol contains the silicon-containing monomer unit in an amount of 0.1 to 3 mol%.
Claim 15
Dependent Claim
29 words
The method of claim 1, wherein the modified polyvinyl alcohol has a degree of polymerization of 100 to 3000, and a degree of saponification of 70 to 100 mol%.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-10-13 | 1990-04-14 | 1990-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-13 | 1994-04-14 | 1994-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-13 | 1998-04-14 | 1998-10-14 | $7700.00 | Window Closed / Lapsed |