Patent US3970629A successfully refreshed from Google Patents.
US3970629A
Expired / Lapsed
US
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Composition for paper coating
Assignee: Sumika Polycarbonate Ltd
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Filing: 1974-12-09
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Granted: 1976-07-20
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Expires: 1994-12-09
Abstract
Abstract A composition for paper coating which comprises a pigment and, as a pigment binder, a synthetic copolymer latex comprising about 24.5 to 50 parts by weight of at least one aliphatic conjugated diolefin, about 0.5 to 10 parts by weight of at least one ethylenically unsaturated carboxylic acid and about 40 to 75 parts by weight of at least one monoolefinic monomer copolymerizable with the aliphatic conjugated diolefin and the ethylenically unsaturated carboxylic acid, the synthetic copolymer having a gel content of not more than about 60 % by weight based on the weight of the synthetic copolymer.
Inventors
- 👤 Nobujiro Izaki
- 👤 Masashi Nakayama
- 👤 Saburo Mishiba
- 👤 Sadao Sekiguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:45
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/44; D21H19/56; D21H19/58; C; C08; C08F; C08F236/00; C08F236/02; C08F236/04; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
105 words
A paper coating composition having improved blister-preventing, ink transferability, water-resistant and pick-resistant properties which comprises a pigment and, as a pigment binder, a synthetic copolymer latex consisting essentially of from 24.5 to 50 parts by weight of at least one aliphatic conjugated diolefin, from 0.5 to 10 parts by weight of at least one ethylenically unsaturated carboxylic acid and from 40 to 75 parts by weight of at least one monoolefinic monomer copolymerizable with the aliphatic conjugated diolefin and the ethylenically unsaturated carboxylic acid, the gel content of said copolymer being not more than 40% by weight based on the weight of the synthetic copolymer.
Claim 2
Dependent Claim
105 words
A paper coating composition having improved blister-preventing, ink transferability, water-resistant and pick-resistant properties which comprises a pigment and, as a pigment binder, a synthetic copolymer latex consisting essentially of from 24.5 to 50 parts by weight of at least one aliphatic conjugated diolefin, from 0.5 to 10 parts by weight of at least one ethylenically unsaturated carboxylic acid and from 40 to 75 parts by weight of at least one monoolefinic monomer copolymerizable with the aliphatic conjugated diolefin and the ethylenically unsaturated carboxylic acid, the gel content of said copolymer being not more than 40% by weight based on the weight of the synthetic copolymer.
Claim 3
Dependent Claim
25 words
The paper coating composition according to claim 1, wherein the aliphatic conjugated diolefin is a member selected from the group consisting of butadiene and isoprene.
Claim 4
Dependent Claim
41 words
The paper coating composition according to claim 1, wherein the ethylenically unsaturated carboxylic acid is a member selected from the group consisting of acrylic acid, methacrylic acid, maleic acid, fumaric acid and itaconic acid and the anhydrides and monoalkyl esters thereof.
Claim 5
Dependent Claim
32 words
The paper coating composition according to claim 1, wherein the monoolefinic monomer is a member selected from the group consisting of aromatic vinyl monomers, acrylic monomers, methacrylic monomers, acrylamide, N-methylolacrylamide and acrylonitrile.
Claim 6
Dependent Claim
34 words
The paper coating composition according to claim 1, wherein the monoolefinic monomer includes from about 10 to 60 parts by weight of styrene per said 40 to 75 parts by weight of monoolefinic monomer.
Claim 7
Dependent Claim
34 words
The paper coating composition according to claim 1, wherein the monoolefinic monomer includes styrene and/or methylmethacrylate in an amount of not less than 80% by weight based on the weight of the monoolefinic monomer.
Claim 8
Dependent Claim
25 words
The paper coating composition according to claim 1, wherein the monoolefinic monomer includes 1 to 5 parts by weight of 2-hydroxyethyl acrylate and/or glycidyl methacrylate.
Claim 9
Dependent Claim
30 words
The paper coating composition according to claim 1, wherein the pigment is a member selected from the group consisting of satin white, calcium carbonate, aluminium hydroxide, zinc oxide and clay.
Claim 10
Dependent Claim
17 words
The paper coating composition according to claim 1, wherein any other pigment binder is additionally contained therein.
Claim 11
Dependent Claim
44 words
The paper coating composition according to claim 9, wherein the additional pigment binder is a member selected from the group consisting of modified starch, casein, soybean protein, carboxymethylcellulose, polyvinyl alcohol, polyvinyl acetate emulsion, acrylic copolymer emulsion, ethylene-vinyl acetate copolymer emulsion, hydroxyethylcellulose and sodium alginate.
Claim 12
Dependent Claim
15 words
The paper coating composition according to claim 1, wherein a shortstop agent is contained therein.
Claim 13
Dependent Claim
30 words
The paper coating composition according to claim 11, wherein the shortstop agent is a member selected from the group consisting of carbamates, thiurams, sodium thiosulfate, hydroxylamine sulfate, hydroquinone and thiourea.
Claim 14
Dependent Claim
15 words
A web offset printing paper coating with the paper coating composition according to claim 1.
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) | 1979-07-20 | 1980-01-19 | 1980-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-20 | 1984-01-19 | 1984-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-20 | 1988-01-19 | 1988-07-20 | $7700.00 | Window Closed / Lapsed |