US3942995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel paper coating composition
Assignee: Kanegafuchi Chemical Industry Co Ltd
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Filing: 1973-01-22
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Granted: 1976-03-09
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Expires: 1993-01-22
Abstract
Abstract A paper coating composition comprising (A) a pigment as a main ingredient and (B) a binder for said pigment which is either (a) an alkali decomposition product of a yeast or (b) a mixture of said alkali decomposition product of a yeast and an emulsion of a synthetic polymer and/or an aqueous solution of a natural or snythetic polymer and the paper coating composition coated paper product are disclosed.
Inventors
- 👤 Atsushi Ichikawa
- 👤 Norihiko Adachi
- 👤 Masayoshi Kawanabe
- 👤 Yozi Hisada
- 👤 Yuichi Kohzaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:48
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/44; D21H19/50
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
58 words
A paper coating composition comprising (A) a pigment as a main ingredient and (B) as a binder for said pigment an alkali decomposition product of a yeast produced by heating said yeast with alkali at 30°-100°C for ten minutes to ten hours, said yeast being decolored prior to alkali decomposition with sodium boron hydrate as a reducing agent.
Claim 2
Dependent Claim
58 words
A paper coating composition comprising (A) a pigment as a main ingredient and (B) as a binder for said pigment an alkali decomposition product of a yeast produced by heating said yeast with alkali at 30°-100°C for ten minutes to ten hours, said yeast being decolored prior to alkali decomposition with sodium boron hydrate as a reducing agent.
Claim 3
Dependent Claim
26 words
The composition of claim 1 wherein the amount of said binder is 5 to 50 parts by weight per 100 parts by weight of said pigment.
Claim 4
Dependent Claim
30 words
The composition of claim 1 wherein said yeast is selected from the group consisting of baker's yeasts, nucleic acid yeasts, beer yeasts, pulp yeasts, and yeasts which assimilate petrochemical products.
Claim 5
Dependent Claim
20 words
The composition of claim 1 wherein said yeast is at least one yeast which assimilates methanol, acetic acid or n-paraffin.
Claim 6
Dependent Claim
24 words
The composition of claim 1 wherein said yeast is selected from the group consisting of Saccaromyces genus, Candida genus, Mycotorula genus and Pichia genus.
Claim 7
Dependent Claim
23 words
The composition of claim 1 wherein said yeast is heated with the alkali at 60° to 100°C for 10 minutes to one hour.
Claim 8
Dependent Claim
26 words
The composition of claim 1 wherein said alkali is selected from the group consisting of sodium hydroxide, ammonia, slaked lime, sodium phosphate, sodium carbonate and borax.
Claim 9
Dependent Claim
16 words
The composition of claim 1 wherein said alkali is sodium hydroxide, ammonia or a mixture thereof.
Claim 10
Dependent Claim
27 words
The composition of claim 1 wherein the amount of the alkali is such that the pH of an aqueous suspension of the yeast reaches at least 8.
Claim 11
Dependent Claim
19 words
The composition of claim 9 wherein the pH of an aqueous suspension of the yeast is 9 to 13.
Claim 12
Dependent Claim
57 words
The composition of claim 1 wherein said binder is a mixture of said alkali decomposition product of a yeast and an emulsion of a synthetic polymer selected from the group consisting of emulsions of a styrene/butadiene copolymer, butadiene/methyl methacrylate copolymer, styrene/butadiene/methyl methacrylate copolymer, ethylene/vinyl acetate copolymer, polyvinyl acetate, vinyl acetate/acrylate copolymer, styrene/acrylate copolymer and styrene/vinyl acetate copolymer.
Claim 13
Dependent Claim
46 words
The composition of claim 1 wherein said binder is a mixture of said alkali decomposition product of a yeast and an aqueous solution of a water-soluble natural or synthetic polymer selected from the group consising of casein, soybean protein, oxidized starch, polyvinyl alcohol and carboxymethyl cellulose.
Claim 14
Dependent Claim
23 words
The composition of claim 1 wherein said pigment is selected from the group consisting of clay, titanium oxide, satin white and calcium carbonate.
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) | 1979-03-09 | 1979-09-08 | 1980-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-09 | 1983-09-08 | 1984-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-09 | 1987-09-08 | 1988-03-09 | $7700.00 | Window Closed / Lapsed |