US4567221A
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Water resistant compositions
Assignee: Kuraray Co Ltd
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Filing: 1984-03-08
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Granted: 1986-01-28
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Expires: 2004-03-08
Abstract
Abstract Water-resistant compositions which comprise a modified polyvinyl alcohol having a silyl group in the molecule and an organic substance, useful as compositions for treating inorganic materials and defogging compositions.
Inventors
- 👤 Hitoshi Maruyama
- 👤 Taku Tanaka
- 👤 Takuji Okaya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:04
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/18; C08; C08K; C08K3/00; C08K3/34; C08K3/36
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
156 words
A composition which comprises a modified polyvinyl alcohol, having a silyl group in the molecule, and an inorganic substance selected from those containing aluminum, silica and magnesium; wherein the silyl group in the molecule is a silyl group of the formula (I) ##STR4## wherein m=0-2 and p=1-3, with the proviso that m+p≦3; M is a hydrogen atom or an alkali metal; R 1 is (C 1 -C 5 ) alkyl; and R 2 is (C 1 -C 40 ) alkoxyl, (C 1 -C 40 ) acyloxyl, or (C 1 -C 40 ) alkoxyl or (C 1 -C 40 ) acyloxyl having a substituent containing oxygen; wherein the mixing ratio by weight of the modified polyvinyl alcohol having a silyl group in the molecule to the inorganic substance is in the range of about 5/95 to 99/1; wherein the modified polyvinyl alcohol contains about 0.01-10 molar % of monomer unit containing a silyl group in the molecule.
Claim 2
Dependent Claim
156 words
A composition which comprises a modified polyvinyl alcohol, having a silyl group in the molecule, and an inorganic substance selected from those containing aluminum, silica and magnesium; wherein the silyl group in the molecule is a silyl group of the formula (I) ##STR4## wherein m=0-2 and p=1-3, with the proviso that m+p≦3; M is a hydrogen atom or an alkali metal; R 1 is (C 1 -C 5 ) alkyl; and R 2 is (C 1 -C 40 ) alkoxyl, (C 1 -C 40 ) acyloxyl, or (C 1 -C 40 ) alkoxyl or (C 1 -C 40 ) acyloxyl having a substituent containing oxygen; wherein the mixing ratio by weight of the modified polyvinyl alcohol having a silyl group in the molecule to the inorganic substance is in the range of about 5/95 to 99/1; wherein the modified polyvinyl alcohol contains about 0.01-10 molar % of monomer unit containing a silyl group in the molecule.
Claim 3
Dependent Claim
34 words
The composition according to claim 1 wherein the modified polyvinyl alcohol is a saponified product of a copolymer of a vinyl ester and an olefinically unsaturated monomer having a silyl group in the molecule.
Claim 4
Dependent Claim
70 words
The composition according to claim 2 wherein the olefinically unsaturated monomer having a silyl group in the molecule is a vinylsilane of the formula (II): ##STR5## wherein n is 0-4, m is 0-2, R 1 is an alkyl group of 1-4 carbon atoms, and R 2 is an alkoxyl group or acyloxyl group of 1-40 carbon atoms or an alkoxyl group or acyloxyl group having a substituent group containing oxygen.
Claim 5
Dependent Claim
123 words
The composition according to claim 2 wherein the olefinically unsaturated monomer having a silyl group in the molecule is a monomer of the formula (III): ##STR6## wherein m is 0-2, R 1 is an alkyl group of 1-5 carbon atoms, R 2 is an alkoxyl group or acyloxyl group of 1-40 carbon atoms, or an alkoxyl group or acyloxyl group having a substituent group containing oxygen, R 3 is a hydrogen atom or a methyl group, R 4 is a hydrogen atom or an alkyl group of 1-5 carbon atoms, and R 5 is an alkylene group of 1-5 carbon atoms or a divalent organic residue in which the carbon atoms in the chain are connected with each other via oxygen or nitrogen.
Claim 6
Dependent Claim
49 words
The composition according to claim 1 wherein the modified polyvinyl alcohol having a silyl group in the molecule is a saponified product of a polyvinyl ester having a silyl group at a terminal obtained by polymerizing a vinyl ester in the presence of a mercaptan having a silyl group.
Claim 7
Dependent Claim
25 words
The composition according to claim 1 wherein the inorganic substance is finely divided particles of an average particle diameter of not greater than 200 mμ.
Claim 8
Dependent Claim
25 words
The composition according to claim 6 wherein the inorganic substance is finely divided particles of an average particle diameter of not greater than 100 mμ.
Claim 9
Dependent Claim
13 words
The composition according to claim 1 wherein the inorganic substance is colloidal silica.
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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) | 1989-01-27 | 1989-07-29 | 1990-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-27 | 1993-07-29 | 1994-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-27 | 1997-07-29 | 1998-01-28 | $7700.00 | Window Closed / Lapsed |