US4708947A
Expired / Lapsed
US
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Water resistant composition and heat-sensitive recording sheet containing the same
Assignee: Kuraray Co Ltd
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Filing: 1986-01-02
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Granted: 1987-11-24
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Expires: 2006-01-02
Abstract
Abstract This invention relates to a water resistant composition which comprises (A) polyvinyl alcohol, (B) a chitosan of which aqueous 1% solution has a viscosity not greater than 70 centipoise at 20 DEG C. and (C) an aldehyde compound, as well as a heat-sensitive recording sheet which comprises said composition. The composition has excellent water resistant properties and the heat-sensitive recording sheet has improved color forming properties and excellent resistance to water and solvents.
Inventors
- 👤 Hitoshi Maruyama
- 👤 Isao Ono
- 👤 Hiroji Kohno
- 👤 Junnosuke Yamauchi
- 👤 Takuji Okaya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:52
CPC Classifications
C; C08; C08L; C08L5/00; C08L5/08; B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/337; B41M5/3372; B41M5/40; B41M5/42; B41M5/44; B41M5/443; C08L29/00; C08L29/02; C08L29/04
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
55 words
A heat-sensitive recording sheet comprising a support having provided thereon with a heat-sensitive color forming layer, wherein (A) polyvinyl alcohol, (B) a chitosan of which aqueous 1% solution has a viscosity not greater than 70 centipoise at 20° C. and (C) an aldehyde compound are incorporated into, or applied onto, said heat-sensitive color forming layer.
Claim 2
Dependent Claim
55 words
A heat-sensitive recording sheet comprising a support having provided thereon with a heat-sensitive color forming layer, wherein (A) polyvinyl alcohol, (B) a chitosan of which aqueous 1% solution has a viscosity not greater than 70 centipoise at 20° C. and (C) an aldehyde compound are incorporated into, or applied onto, said heat-sensitive color forming layer.
Claim 3
Dependent Claim
30 words
A heat-sensitive recording sheet as claimed in claim 1, wherein said aqueous 1% solution of said chitosan (B) has a viscosity of from 1 to 30 centipoise at 20° C.
Claim 4
Dependent Claim
30 words
A heat-sensitive recording sheet as claimed in claim 2, wherein said aqueous 1% solution of said chitosan (B) has a viscosity of from 1 to 10 centipoise at 20° C.
Claim 5
Dependent Claim
20 words
A heat-sensitive recording sheet as claimed in claim 1, wherein said aldehyde compound (C) is a water soluble aldehyde compound.
Claim 6
Dependent Claim
43 words
A heat-sensitive recording sheet as claimed in claim 4, wherein said aldehyde compound (C) is one or more compounds selected from the group consisting of water soluble monoaldehydes, polyaldehydes, condensation products of amines and formalin, methylolamides, urea formalin resins and melamine formalin resins.
Claim 7
Dependent Claim
18 words
A heat-sensitive recording sheet as claimed in claim 5, wherein said aldehyde compound (C) is glyoxal or hexamethylenetetramine.
Claim 8
Dependent Claim
54 words
A heat-sensitive recording sheet as claimed in claim 1, wherein the ratio by weight of said polyvinyl alcohol (A) to said chitosan (B); [(A)/(B)] is from 99/1 to 50/50 and the ratio by weight of said polyvinyl alcohol (A) and said chitosan (B) to said aldehyde compound (C); {[(A)+(B)]/(C)} is from 100/1 to 100/20.
Claim 9
Dependent Claim
25 words
A heat-sensitive recording sheet as claimed in claim 1, wherein said polyvinyl alcohol (A) is a modified polyvinyl alcohol having silyl group in the molecule.
Claim 10
Dependent Claim
43 words
A heat-sensitive recording sheet as claimed in claim 8, wherein said modified polyvinyl alcohol (A) having silyl group in the molecule is a hydrolyzed product of a copolymer of a vinyl ester and an olefinically unsaturated monomer having silyl group in the molecule.
Claim 11
Dependent Claim
27 words
A heat-sensitive recording sheet as claimed in claim 8, wherein said modified polyvinyl alcohol (A) contains from 0.01 to 10% by mole of silyl group-containing monomer units.
Claim 12
Dependent Claim
27 words
A heat-sensitive recording sheet as claimed in claim 8, wherein said modified polyvinyl alcohol (A) contains from 0.1 to 5% by mole of silyl group-containing monomer units.
Claim 13
Dependent Claim
32 words
A water resistant composition comprising (A) polyvinyl alcohol, (B) a chitosan of which aqueous 1% solution has a viscosity not greater than 70 centipoise at 20° C. and (C) an aldehyde compound.
Claim 14
Dependent Claim
32 words
A water resistant composition comprising (A) polyvinyl alcohol, (B) a chitosan of which aqueous 1% solution has a viscosity not greater than 70 centipoise at 20° C. and (C) an aldehyde compound.
Claim 15
Dependent Claim
30 words
A water resistant composition as claimed in claim 12, wherein said aqueous 1% solution of said chitosan (B) has a viscosity of from 1 to 30 centipoise at 20° C.
Claim 16
Dependent Claim
30 words
A water resistant composition as claimed in claim 13, wherein said aqueous 1% solution of said chitosan (B) has a viscosity of from 1 to 10 centipoise at 20° C.
Claim 17
Dependent Claim
20 words
A water resistant composition as claimed in claim 12, wherein said aldehyde compound (C) is a water soluble aldehyde compound.
Claim 18
Dependent Claim
43 words
A water resistant composition as claimed in claim 15, wherein said aldehyde compound (C) is one or more compounds selected from the group consisting of water soluble monoaldehydes, polyaldehydes, condensation products of amines and formalin, methylolamides, urea formalin resins and melamine formalin resins.
Claim 19
Dependent Claim
18 words
A water resistant composition as claimed in claim 16, wherein said aldehyde compound (C) is glyoxal or hexamethylenetetramine.
Claim 20
Dependent Claim
54 words
A water resistant composition as claimed in claim 12, wherein the ratio by weight of said polyvinyl alcohol (A) to said chitosan (B); [(A)/(B)] is from 99/1 to 10/99, and the ratio by weight of said polyvinyl alcohol (A) and said chitosan (B) to said aldehyde compound (C); {[(A)+(B)]/(C)} is from 100/1 to 100/20.
Claim 21
Dependent Claim
42 words
A water resistant composition comprising (A) a modified polyvinyl alcohol having a silyl group in the molecule, (B) a chitosan of which an aqueous 1% solution has a viscosity not greater than 70 centipoise at 20° C. and (C) an aldehyde compound.
Claim 22
Dependent Claim
42 words
A water resistant composition comprising (A) a modified polyvinyl alcohol having a silyl group in the molecule, (B) a chitosan of which an aqueous 1% solution has a viscosity not greater than 70 centipoise at 20° C. and (C) an aldehyde compound.
Claim 23
Dependent Claim
43 words
A water resistant composition as claimed in claim 19, wherein said modified polyvinyl alcohol (A) having silyl group in the molecule is a hydrolyzed product of a copolymer of a vinyl ester and an olefinically unsaturated monomer having silyl group in the molecule.
Claim 24
Dependent Claim
27 words
A water resistant composition as claimed in claim 19, wherein said modified polyvinyl alcohol (A) contains from 0.01 to 10% by mole of silyl group-containing monomer units.
Claim 25
Dependent Claim
27 words
A water resistant composition as claimed in claim 19, wherein said modified polyvinyl alcohol (A) contains from 0.1 to 5% by mole of silyl group-containing monomer units.
Claim 26
Dependent Claim
25 words
The water resistant composition of claim 19, wherein said aqueous 1% solution of said chitosan has a viscosity of from 1-30 centipoise at 20° C.
Claim 27
Dependent Claim
27 words
The water resistant composition of claim 23, wherein said aqueous 1% solution of said chitosan has a viscosity of from 1 to 10 centipoise at 20° C.
Claim 28
Dependent Claim
17 words
The water resistant composition of claim 19, wherein said aldehyde compound is a water soluble aldehyde compound.
Claim 29
Dependent Claim
38 words
The water resistant composition of claim 25, wherein said aldehyde compound is at least one compound selected from the group consisting of water soluble monoaldehydes, polyaldehydes, condensation products of amines and formalin, methylolamides, urea-formalin resins and melamine-formalin resins.
Claim 30
Dependent Claim
21 words
The water resistant composition of claim 26, wherein said aldehyde compound is selected from the group consisting of glyoxal and hexamethylenetetramine.
Claim 31
Dependent Claim
68 words
The water resistant composition of claim 19, wherein the ratio by weight, (A)/(B), of said modified polyvinyl alcohol having a silyl group in the molecule (A) to said chitosan (B) is from 99:1 to 10:99, and the ratio by weight, (A)+(B)/(C), of said modified polyvinyl alcohol having a silyl group in the molecule (A) and said chitosan (B) to said aldehyde compound (C) is from 100:1 to 100:20.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1990-11-23 | 1991-05-25 | 1991-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-23 | 1995-05-25 | 1995-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-23 | 1999-05-25 | 1999-11-24 | $7700.00 | Window Closed / Lapsed |