US4278583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper coating composition
Assignee: Zeon Corp
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Filing: 1979-12-20
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Granted: 1981-07-14
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Expires: 1999-12-20
Abstract
Abstract A paper coating composition having improved ink receptivity in multi-color printing which comprises (I) 100 parts by weight of a pigment, and (II) 1 to 30 parts by weight, as solids content, of a latex of a copolymer derived from 20 to 50% by weight of an aliphatic conjugated diolefin, 0.5 to 5% by weight of an ethylenically unsaturated acid monomer, 0.5 to 5% by weight of an ethylenically unsaturated amine monomer, and 10 to 74% by weight of a mono-olefinically unsaturated monomer, said latex containing not more than 1% by weight, based on the copolymer of an emulsifier, having a gel point within a pH range of 3.5 to 8.5 and being gellable during the drying of a paper coated with said composition, said composition having a higher pH than the gel point of the latex.
Inventors
- 👤 Masayoshi Sekiya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:25
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/44; D21H19/56; D21H19/58; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
145 words
A paper coating composition comprising: (I) 100 parts by weight of a pigment, and (II) 1 to 30 parts by weight, as solids contents, of a latex comprising a copolymer derived from 20 to 50% by weight of an aliphatic conjugated diolefin, 0.5 to 4.8% by weight of an ethylenically unsaturated acid monomer, 0.5 to 4% by weight of an ethylenically unsaturated amine monomer, and 10 to 74% by weight of a mono-olefinically unsaturated monomer, selected from aromatic vinyl compounds, alkyl acrylates, alkyl methacrylates and ethylenic nitrile compounds, and an emulsifier in an amount of not more than 1% by weight based on the copolymer, said latex having a gel point within a pH range of 3.5 to 8.5 and being gellable during the drying of a paper coated with said composition, said composition having a higher pH than the gel point of the latex.
Claim 2
Dependent Claim
145 words
A paper coating composition comprising: (I) 100 parts by weight of a pigment, and (II) 1 to 30 parts by weight, as solids contents, of a latex comprising a copolymer derived from 20 to 50% by weight of an aliphatic conjugated diolefin, 0.5 to 4.8% by weight of an ethylenically unsaturated acid monomer, 0.5 to 4% by weight of an ethylenically unsaturated amine monomer, and 10 to 74% by weight of a mono-olefinically unsaturated monomer, selected from aromatic vinyl compounds, alkyl acrylates, alkyl methacrylates and ethylenic nitrile compounds, and an emulsifier in an amount of not more than 1% by weight based on the copolymer, said latex having a gel point within a pH range of 3.5 to 8.5 and being gellable during the drying of a paper coated with said composition, said composition having a higher pH than the gel point of the latex.
Claim 3
Dependent Claim
67 words
The paper coating composition of claim 1 wherein the latex (II) is obtained by emulsion-polymerizing the aliphatic conjugated diolefin, ethylenically unsaturated acid monomer and mono-olefinically unsaturated monomer, adjusting the pH of the system to at least 7 after the reaction, then adding the ethylenically unsaturated amine monomer alone or together with the aliphatic conjugated diolefin and mono-olefinically unsaturated monomer, and continuing the polymerization until it is completed.
Claim 4
Dependent Claim
20 words
The paper composition of claim 1 wherein at least 50% by weight of the pigment (I) consists of kaolinite clay.
Claim 5
Dependent Claim
22 words
A mineral-coated paper product comprising a paper sheet carrying on its surface a dried deposit of the coating composition of claim 1.
Claim 6
Dependent Claim
45 words
The paper coating composition of claim 1 further comprising a hydrophilic monomer selected from the group consisting of β-hydroxyethyl acrylate, β-hydroxy-propyl acrylate, β-hydroxyethyl acrylate, acrylamide, methacrylamide, N-methylol acrylamide, diacetone acrylamide, glycidyl acrylate, glycidyl methacrylate, acrolein, and allyl alcohol in combination with said mono-olefinically unsaturated monomer.
Claim 7
Dependent Claim
65 words
The paper coating composition of claim 1 wherein said mono-olefinically unsaturated amine monomer is selected from (a) monomers expressed by the general formula ##STR3## wherein R 1 represents hydrogen or methyl, R 2 represents alkylene of 2 to 10 carbon atoms, R 3 and R 4 represent hydrogen or alkyl of 2 to 12 carbon atoms, and A represents ##STR4## or --O--; and (b) vinylpyridines.
Claim 8
Dependent Claim
13 words
The paper coating composition of claim 1 additionally containing starch or polyvinyl alcohol.
Claim 9
Dependent Claim
22 words
A mineral-coated paper product comprising a paper sheet carrying on its surface a dried deposit of the coating composition of claim 2.
Claim 10
Dependent Claim
22 words
A mineral-coated paper product comprising a paper sheet carrying on its surface a dried deposit of the coating composition of claim 3.
Claim 11
Dependent Claim
59 words
The composition of claim 5 wherein the amine monomer is a compound of the formula: ##STR5## wherein R 1 is a hydrogen or methyl; R 2 is alkylene of 2 to 10 carbon atoms, R 3 and R 4 are independently of each other hydrogen or alkyl of 2 to 12 carbon atoms, and A is ##STR6## or --O--.
Claim 12
Dependent Claim
36 words
The composition of any one of claims 1 and 10 wherein the amount of the acid monomer is 0.4 to 4.0% by weight and the amount of the amine monomer is 0.5% to 4.0% by weight.
References Cited (Backward Citations)
US3957710A
Cited
US3970629A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-07-13 | 1985-01-12 | 1985-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-13 | 1989-01-12 | 1989-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-13 | 1993-01-12 | 1993-07-14 | $7700.00 | Window Closed / Lapsed |