GB1601641A - Aqueous paper coating compotion - Google Patents
Aqueous paper coating compotion Download PDFInfo
- Publication number
- GB1601641A GB1601641A GB6333/78A GB633378A GB1601641A GB 1601641 A GB1601641 A GB 1601641A GB 6333/78 A GB6333/78 A GB 6333/78A GB 633378 A GB633378 A GB 633378A GB 1601641 A GB1601641 A GB 1601641A
- Authority
- GB
- United Kingdom
- Prior art keywords
- composition
- monomer
- vinyl acetate
- dispersion
- pigment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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- 238000000576 coating method Methods 0.000 title description 3
- 239000011248 coating agent Substances 0.000 title description 2
- 239000000178 monomer Substances 0.000 claims description 43
- 239000006185 dispersion Substances 0.000 claims description 35
- 239000000123 paper Substances 0.000 claims description 27
- 239000008199 coating composition Substances 0.000 claims description 25
- 239000000203 mixture Substances 0.000 claims description 23
- 229920001577 copolymer Polymers 0.000 claims description 20
- 239000000049 pigment Substances 0.000 claims description 20
- 239000011230 binding agent Substances 0.000 claims description 17
- 239000007787 solid Substances 0.000 claims description 13
- 150000002148 esters Chemical class 0.000 claims description 10
- FYRWKWGEFZTOQI-UHFFFAOYSA-N 3-prop-2-enoxy-2,2-bis(prop-2-enoxymethyl)propan-1-ol Chemical group C=CCOCC(CO)(COCC=C)COCC=C FYRWKWGEFZTOQI-UHFFFAOYSA-N 0.000 claims description 9
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 9
- 238000007334 copolymerization reaction Methods 0.000 claims description 9
- 125000000542 sulfonic acid group Chemical group 0.000 claims description 9
- -1 poly-allyl ethers Chemical class 0.000 claims description 8
- 150000001298 alcohols Chemical class 0.000 claims description 7
- LDHQCZJRKDOVOX-NSCUHMNNSA-N crotonic acid Chemical compound C\C=C\C(O)=O LDHQCZJRKDOVOX-NSCUHMNNSA-N 0.000 claims description 7
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 claims description 7
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 6
- ZPOLOEWJWXZUSP-AATRIKPKSA-N bis(prop-2-enyl) (e)-but-2-enedioate Chemical compound C=CCOC(=O)\C=C\C(=O)OCC=C ZPOLOEWJWXZUSP-AATRIKPKSA-N 0.000 claims description 5
- FBCQUCJYYPMKRO-UHFFFAOYSA-N prop-2-enyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCC=C FBCQUCJYYPMKRO-UHFFFAOYSA-N 0.000 claims description 5
- 150000003839 salts Chemical group 0.000 claims description 5
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims description 4
- 150000001735 carboxylic acids Chemical class 0.000 claims description 4
- CBQFBEBEBCHTBK-UHFFFAOYSA-N 1-phenylprop-2-ene-1-sulfonic acid Chemical compound OS(=O)(=O)C(C=C)C1=CC=CC=C1 CBQFBEBEBCHTBK-UHFFFAOYSA-N 0.000 claims description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 3
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 claims description 3
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 3
- 125000001931 aliphatic group Chemical group 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 125000005395 methacrylic acid group Chemical group 0.000 claims description 3
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 claims description 3
- 159000000000 sodium salts Chemical class 0.000 claims description 3
- 229920001567 vinyl ester resin Polymers 0.000 claims description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 3
- 125000003118 aryl group Chemical group 0.000 claims description 2
- BDHFUVZGWQCTTF-UHFFFAOYSA-N sulfonic acid Chemical compound OS(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-N 0.000 claims description 2
- 239000003995 emulsifying agent Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000002245 particle Substances 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 125000000129 anionic group Chemical group 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 2
- 206010016807 Fluid retention Diseases 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 238000003490 calendering Methods 0.000 description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 description 2
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 2
- 238000007720 emulsion polymerization reaction Methods 0.000 description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 229920002689 polyvinyl acetate Polymers 0.000 description 2
- 239000011118 polyvinyl acetate Substances 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- BWYYYTVSBPRQCN-UHFFFAOYSA-M sodium;ethenesulfonate Chemical compound [Na+].[O-]S(=O)(=O)C=C BWYYYTVSBPRQCN-UHFFFAOYSA-M 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- KEDHVYZRMXPBMP-UHFFFAOYSA-N 2-methyl-1-oxoprop-2-ene-1-sulfonic acid Chemical class CC(=C)C(=O)S(O)(=O)=O KEDHVYZRMXPBMP-UHFFFAOYSA-N 0.000 description 1
- KFNGWPXYNSJXOP-UHFFFAOYSA-N 3-(2-methylprop-2-enoyloxy)propane-1-sulfonic acid Chemical compound CC(=C)C(=O)OCCCS(O)(=O)=O KFNGWPXYNSJXOP-UHFFFAOYSA-N 0.000 description 1
- FHVDTGUDJYJELY-UHFFFAOYSA-N 6-{[2-carboxy-4,5-dihydroxy-6-(phosphanyloxy)oxan-3-yl]oxy}-4,5-dihydroxy-3-phosphanyloxane-2-carboxylic acid Chemical compound O1C(C(O)=O)C(P)C(O)C(O)C1OC1C(C(O)=O)OC(OP)C(O)C1O FHVDTGUDJYJELY-UHFFFAOYSA-N 0.000 description 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical class C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
- 229920000881 Modified starch Polymers 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 229940072056 alginate Drugs 0.000 description 1
- 235000010443 alginic acid Nutrition 0.000 description 1
- 229920000615 alginic acid Polymers 0.000 description 1
- 150000008051 alkyl sulfates Chemical class 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000007844 bleaching agent Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000005018 casein Substances 0.000 description 1
- BECPQYXYKAMYBN-UHFFFAOYSA-N casein, tech. Chemical compound NCCCCC(C(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(CC(C)C)N=C(O)C(CCC(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(C(C)O)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(COP(O)(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(N)CC1=CC=CC=C1 BECPQYXYKAMYBN-UHFFFAOYSA-N 0.000 description 1
- 235000021240 caseins Nutrition 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 235000019426 modified starch Nutrition 0.000 description 1
- 238000007645 offset printing Methods 0.000 description 1
- 238000009994 optical bleaching Methods 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- JRKICGRDRMAZLK-UHFFFAOYSA-L persulfate group Chemical group S(=O)(=O)([O-])OOS(=O)(=O)[O-] JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 1
- UIIIBRHUICCMAI-UHFFFAOYSA-N prop-2-ene-1-sulfonic acid Chemical compound OS(=O)(=O)CC=C UIIIBRHUICCMAI-UHFFFAOYSA-N 0.000 description 1
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 description 1
- 235000019982 sodium hexametaphosphate Nutrition 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 150000003871 sulfonates Chemical class 0.000 description 1
- 150000003460 sulfonic acids Chemical class 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- NLVXSWCKKBEXTG-UHFFFAOYSA-N vinylsulfonic acid Chemical compound OS(=O)(=O)C=C NLVXSWCKKBEXTG-UHFFFAOYSA-N 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H19/60—Polyalkenylalcohols; Polyalkenylethers; Polyalkenylesters
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L31/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid or of a haloformic acid; Compositions of derivatives of such polymers
- C08L31/02—Homopolymers or copolymers of esters of monocarboxylic acids
- C08L31/04—Homopolymers or copolymers of vinyl acetate
Description
(54) IMPROVEMENTS IN OR RELATING TO AN AQUEOUS
PAPER COATING COMPOSITION
(71) We, KONINKLIJKE SCHOLTEN-HONIG N.V. a Dutch company of Kabelweg 37, Amsterdam, Holland, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:
This invention relates to an aqueous paper coating composition based on pigment and a vinyl acetate copolymer dispersion as binder, and its preparation.
A paper coating composition based on a dispersion as a binder should possess good rheological properties with an optimum dry solids content. The papers treated with these coating compositions inter alia should possess the following properties: pick resistance, water resistance, sufficient porosity, proper ink receptivity smoothness, gloss and light resistance.
These dispersions should possess various properties in order to impart the desired properties to films or coatings prepared therefrom on paper. The dispersion properties which play an important part are, inter alia, particle size, mechanical stability, storage resistance, freeze-thaw stability, heat stability, pigment-bonding capacity, compatibility with other binders, stability relative to divalent ions, tendency to foam formation, viscosity and rheological properties.
Although there are known already numerous compositions which comply with one or more of said requirements to be applicable to a dispersion or the coated paper, in several of the properties there still exist serious shortcomings which prevent the attainment of the desired paper quality.
The polyvinyl acetate dispersions and vinyl acetate copolymer dispersions used so far in paper coating compositions impart to the coated paper a sufficient porosity, which is important in the rotary offset process. In addition, however, these dispersions give a relatively low pick resistance, in particular a low wet pick resistance, which in particular in offset printing may cause problems.
It has now been found possible to provide a coating composition based on a vinyl acetate copolymer dispersion, usually having a small particle size, by means of which can be produced coated paper having improved printability, in particular improved wet pick resistance with retention of the proper porosity properties and stiffness.
The invention relates to the production of an aqueous paper coating composition based on pigment and a vinyl acetate colpolymer dispersion as a binder, there being present, based on the pigment, 2-18 wt.% of vinyl acetate copolymer solids obtained by copolymerization of vinyl acetate with 0.2-2 wt.%, based on total monomer, of an unsaturated monomer containing at least one organic sulfonic acid group, which may be wholly or partly in salt form, and 0.2-2 wt. %, based on total monomer, of a polyunsaturated monomer selected from poly-allyl ethers for example, di-allyl ethers, mono- or poly-esters of mono- or poly-unsaturated carboxylic acids, preferably selected from penaerythritol triallylether, allyl methacrylate and diallyl fumarate.
Preferably the dispersions have a dry solids content of 40-60 wt. % Suitable unsaturated organic sulfonic acids are aliphatic and/or aromatic sulfonic acids, e.g. allyl sulfonic acid, methacryl sulfonic acids, sulfopropyl methacrylate and vinyltoluene sulfonic acid. Preferably, the vinyl sulfonic acid is used in the form of the sodium salt. These monomers are used in a proportion of 0.2-2 wt.%, based on the weight of all monomers.
Pentaerythritol triallyl ether is particularly preferred as the polypersaturated monomer.
Good results are obtained with amounts of 0.2-2 wt.% of the polypersaturated monomer based on the weight of the monomers used for the polymerization reaction.
If desired, an unsaturated carboxylic acid selected from methacrylic acid, acrylic acid, itaconic acid and crotonic acid may be additionally copolymerized. For this purpose crotonic acid, in a proportion of 0.01-2 wt.% based in monomer, is preferred.
For specific applications an amount of "plasticizing" monomer may be additionally copolymerized. As plasticizing monomers are eligible acrylic, methacrylic and crotonic esters of higher alcohols, vinyl esters of linear and branched alkane carboxylic acids, and maleic and fumaric esters of higher alcohols. These internally plasticizing monomers are commonly employed in concentrations of up to 25 wt.%.
The copolymers to be used in the present invention may, for example, be obtained by emulsion polymerization. The monomers may be added to the water phase batchwise or gradually. As emulsifier are employed the conventional anionic emulsifiers, or mixtures thereof. Good results are obtained with amounts of 0.3-5 wt.% or emulsifier. based on the amount of monomers. Examples of anionic emulsifiers are alkylauryl sulfonates, alkyl sulfates. sulfosuccinic mono- and dialkyl esters. Useful anionic emulsifiers are, for example, ethylene oxide derivatives of alcohols or carboxylic acids having a long chain, or of alkyl phenols.
In the preparation of the dispersion, the polymerization reaction is carried out in the conventional manner in the presence of radical forming catalysts, such as peroxides, persulfates and the like.
Furthermore all conventional activators and stabilizers or other,agents can be used in the emulsion polymerization.
In the preparation of the aqueous dispersions, it is preferred that the later particles have an average particle size of less than about 0.3 , in particular of 0.10-0.25 Il.
Suitable pigments for coating compositions are, for example, china clay, calcium carbonate. satin white, titanium dioxide, calcium sulfate and barium sulfate. Based on pigment, there is used 5-30 wt. % of vinyl acetate copolymer dispersion (having a dry solids content of 40-60 wt.%). The vinyl acetate coplymer dispersions may be replaced partly by other pigment binders, e.g. starch or starch derivatives, for example, enzymatically or oxidatively degraded starch, casein, polyvinyl alcohol and synthetic polymer dispersions.
In addition to the pigment binders and pigments, there may be added the conventional dispersing agents, e.g. phosphates and polyacrylates, as well as anti-foaming agents, optical bleaching agents, dyes etc.
In order to increase the water retention of the coating compositions, a slight amount of a water-soluble polymer, e.g. alginate or carboxymethyl cellulose, may be added.
The coating compositions preferably have a dry solids content of 25-65 wt.% and a pH value of 7-11.
The coating compositions are applied to paper by the conventional methods; e.g. with a doctor blade coater. Other coaters, such as roller coaters and air knife coasters are suitable as well.
The paper coated with the coating composition according to the present invention shows an excellent printability, has a high dry and wet pick resistance as well as good absorption properties, which particularly is expressed in the K- and N-ink test. The dry pick resistance can be determined by means of the I.G.T. test printing apparatus AC2, in which the sector with the paper strip runs at a line pressure of 35 kg/cm and at increasing speed along the printing disc, which is provided with a film of pick oil of standard viscosity and thickness.
The dry pick resistance is given in meter x Poise/sec. The moisture pick is also determined by means of the same apparatus. The paper to be examined is printed with black offset ink.
The paper to be examined is also printed after it has been provided with a water film by means of the I.G.T. apparatus. The density D of both printed strips is measured. The degree of moisture pick is expressed by the formula:
moisture pick = 100 (DD we 100 A higher figure means a higher moisture pick. 0 means no moisture pick.
The K- and N-ink test is carried out according ot Tappi Standard RC-19.
The invention is further illustrated in and by the following examples.
Example I
This example illustrates the preparation of a coating composition according to the invention with the binder being a dispersion of a copolymer on the basis of 98.6 wt.% vinyl acetate, 1 wt.% vinyl sulfonic acid sodium and 0.4 wt.% pentaerythritol triallyl ether.
Components Parts by weight
China-clay 80
chalk 20
sodium hexametaphosphate 0.2
sodium polyacrylate 0.2
NaOH 0.12
polyvinyl acetate coplymer dispersion
in water 12
(calculated as dry solids)
carboxymethyl cellulose 0.5
water up to 62% of dry solids
The coating composition had a pH of 8.5.
The coating composition was applied to the wire side of 80 g/m2 paper by means of a doctor blade coater, and dried. The dry weighting was 17-19 g/m2. After calendering, the paper was conditioned at 65% Relative Humidity and 20"C. Subsequently it was tested for
K- and N-ink absorption by means of a standard method, and on pick resistance with the
I.G.T. test apparatus, both dry and wet pick resistance. Table A shows the results obtained.
Example II
In the manner described in Example I, there was prepared a coating composition with the binder being a dispersion of a copolymer on the basis of 97.6 wt.% O/o of vinyl acetate, 1 wt.% of vinyl sulfonic acid sodium, 0.4 wt.% of pentaerythritol-triallyl ether, with 1 wt.% of crotonic acid being polymerized therewith as an unsaturated carboxylic acid.
Example III
In the manner described in Example I, there was prepared a coating composition with a commercial type of vinyl acetate copolymer as the binder. The coating compositions of
Example II and Example III were applied to the wire side of 80 g/m2 paper under the same conditions as for the coating compositions of Example I, and dried. After calendering and conditioning at 65% Relative Humidity and 20"C, these papers was likewise tested.
Table A shows the results of the tests.
TABLE A
Coating Binder Weighting K- and I.G.T. pick resistance composition g/m-/side N-ink dry pick wet pick
absorption in m/sec P in %
I dispersion 1 18 34 380 15
II dispersion 2 17 35 400 10
III commercial type 18 37 320 50
of vinyl acetate
copolymer
The dry pick resistance of paper with the new vinyl acetate copolymer dispersions as the binder is substantially higher than that obtained with a commercial type of vinyl acetate copolymer. This applies even more to the wet pick resistance (wet pick). It appears from the K- and N-ink values that the new dispersions provide the same good ink absorption as the comparison dispersion.
Summarizing, it may be concluded that the new dispersions impart excellent pick properties to coated paper, in particular a high wet pick resistance, while maintaining a proper ink absorption.
WHAT WE CLAIM IS:
1. An aqueous paper coating composition based on pigment and a vinyl acetate copolymer dispersion as a binder, which comprises pigment and, based on pigment, 2-18 wt.e of vinyl acetate copolymer solids obtained by copolymerization of vinyl acetate with 0.2-2 wt.%, based on total monomer, of an unsaturated monomer containing at least one organic sulfonic acid group which may be wholly or partly in salt form, and 0.2-2 wt. %, based on the total monomer, of a polyunsaturated monomer selected from poly-allyl ethers, and mono- or poly-esters of mono- or poly-unsaturated carboxylic acids.
2. A composition as claimed in claim 1 in which the polyunsaturated monomer is selected from pentaerythritol triallyl ether, allyl methacrylate, and diallyl fumarate.
3. A composition as claimed in claim 2, in which the polyunsaturated monomer is pentaerythritol triallylether.
4. A composition as claimed in any of claims 1 to 3, in which the unsaturated monomer containing at least one organic sulfonic acid group is an aliphatic and/or aromatic sulphonic acid.
5. A composition as claimed in claim 4 in which the unsaturated monomer containing at least one organic sulfonic acid group is vinyltoluene sulfonic acid in the form of its sodium salt.
6. A composition as claimed in any of claims 1 to 5 in which an unsaturated carboxylic acid selected from methacrylic acid, acrylic acid, itaconic acid and crotonic acid is also used in the copolymerization.
7. A composition as claimed in claim 6 in which crotonic acid in an amount of 0.01-2 wt.% based on monomer is copolymerized.
8. A composition as claimed in any of claims 1 to 7 in which up to 25 wt.% of a plasticizing monomer selected from acrylic, methacrylic and crotonic esters of higher alcohols, vinyl esters of linear and branched alkane carboxylic acids, and maleic and fumaric esters of higher alcohols is also used in the copolymerization.
9. A composition as claimed in any of claims 1 to 8, in which the dispersion has a dry solids content of 40 - 60 wt.%.
tO. A composition as claimed in any of claims 1 to 9 in which there is additionally employed another pigment binder and/or a water retention agent.
11. A composition substantially as hereinbefore described with particular reference to
Example I or II.
12. Paper, cardboard or the like. whenever treated with a coating composition as claimed in any of claims 1 to 11.
13. A process for preparing an aqueous paper coating composition based on pigment and a vinyl acetate copolymer dispersion as a binder, characterized by mixing in the dispersion 2-18 wit.%, based on pigments of vinyl acetate copolymer solids obtained by copolymerization of vinyl acetate, 0.2-2 wt.%, based on total monomer, of an unsaturated monomer containing at least one organic sulfonic acid group which may be wholly or partly in salt form, and 0.2-2 wt. f/c, based on total monomer, of a polyunsaturated monomer selected from the group consisting of pentaerythritol triallylether, allyl methacrylate and diallyl fumarate.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (13)
1. An aqueous paper coating composition based on pigment and a vinyl acetate copolymer dispersion as a binder, which comprises pigment and, based on pigment, 2-18 wt.e of vinyl acetate copolymer solids obtained by copolymerization of vinyl acetate with 0.2-2 wt.%, based on total monomer, of an unsaturated monomer containing at least one organic sulfonic acid group which may be wholly or partly in salt form, and 0.2-2 wt. %, based on the total monomer, of a polyunsaturated monomer selected from poly-allyl ethers, and mono- or poly-esters of mono- or poly-unsaturated carboxylic acids.
2. A composition as claimed in claim 1 in which the polyunsaturated monomer is selected from pentaerythritol triallyl ether, allyl methacrylate, and diallyl fumarate.
3. A composition as claimed in claim 2, in which the polyunsaturated monomer is pentaerythritol triallylether.
4. A composition as claimed in any of claims 1 to 3, in which the unsaturated monomer containing at least one organic sulfonic acid group is an aliphatic and/or aromatic sulphonic acid.
5. A composition as claimed in claim 4 in which the unsaturated monomer containing at least one organic sulfonic acid group is vinyltoluene sulfonic acid in the form of its sodium salt.
6. A composition as claimed in any of claims 1 to 5 in which an unsaturated carboxylic acid selected from methacrylic acid, acrylic acid, itaconic acid and crotonic acid is also used in the copolymerization.
7. A composition as claimed in claim 6 in which crotonic acid in an amount of 0.01-2 wt.% based on monomer is copolymerized.
8. A composition as claimed in any of claims 1 to 7 in which up to 25 wt.% of a plasticizing monomer selected from acrylic, methacrylic and crotonic esters of higher alcohols, vinyl esters of linear and branched alkane carboxylic acids, and maleic and fumaric esters of higher alcohols is also used in the copolymerization.
9. A composition as claimed in any of claims 1 to 8, in which the dispersion has a dry solids content of 40 - 60 wt.%.
tO. A composition as claimed in any of claims 1 to 9 in which there is additionally employed another pigment binder and/or a water retention agent.
11. A composition substantially as hereinbefore described with particular reference to
Example I or II.
12. Paper, cardboard or the like. whenever treated with a coating composition as claimed in any of claims 1 to 11.
13. A process for preparing an aqueous paper coating composition based on pigment and a vinyl acetate copolymer dispersion as a binder, characterized by mixing in the dispersion 2-18 wit.%, based on pigments of vinyl acetate copolymer solids obtained by copolymerization of vinyl acetate, 0.2-2 wt.%, based on total monomer, of an unsaturated monomer containing at least one organic sulfonic acid group which may be wholly or partly in salt form, and 0.2-2 wt. f/c, based on total monomer, of a polyunsaturated monomer selected from the group consisting of pentaerythritol triallylether, allyl methacrylate and diallyl fumarate.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7701688A NL7701688A (en) | 1977-02-17 | 1977-02-17 | PROCESS FOR PREPARING FLOATING MASSES FOR PAPER WITH VINYL ACETATE COPOLYMER DISPERSIONS AS BINDING AGENTS. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1601641A true GB1601641A (en) | 1981-11-04 |
Family
ID=19827998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB6333/78A Expired GB1601641A (en) | 1977-02-17 | 1978-02-17 | Aqueous paper coating compotion |
Country Status (8)
| Country | Link |
|---|---|
| DE (1) | DE2806328A1 (en) |
| ES (1) | ES467600A1 (en) |
| FR (1) | FR2381130A1 (en) |
| GB (1) | GB1601641A (en) |
| IT (1) | IT1095421B (en) |
| NL (1) | NL7701688A (en) |
| SE (1) | SE7801802L (en) |
| ZA (1) | ZA78908B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3208286A4 (en) * | 2014-10-17 | 2018-05-16 | Kuraray Co., Ltd. | Vinyl alcohol polymer and use thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE626416A (en) * | 1961-12-23 | |||
| GB1150561A (en) * | 1965-07-14 | 1969-04-30 | Kurashiki Rayon Kk | Coating Compositions for High Grade Paper |
| AT302016B (en) * | 1970-07-09 | 1972-09-25 | Vianova Kunstharz Ag | Process for the production of paper coating slips |
-
1977
- 1977-02-17 NL NL7701688A patent/NL7701688A/en not_active Application Discontinuation
-
1978
- 1978-02-15 DE DE19782806328 patent/DE2806328A1/en not_active Withdrawn
- 1978-02-15 ES ES467600A patent/ES467600A1/en not_active Expired
- 1978-02-16 ZA ZA00780908A patent/ZA78908B/en unknown
- 1978-02-16 SE SE7801802A patent/SE7801802L/en unknown
- 1978-02-16 IT IT20332/78A patent/IT1095421B/en active
- 1978-02-17 GB GB6333/78A patent/GB1601641A/en not_active Expired
- 1978-02-17 FR FR7804555A patent/FR2381130A1/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3208286A4 (en) * | 2014-10-17 | 2018-05-16 | Kuraray Co., Ltd. | Vinyl alcohol polymer and use thereof |
| US10214604B2 (en) | 2014-10-17 | 2019-02-26 | Kuraray Co., Ltd. | Vinyl alcohol polymer and use thereof |
| TWI662052B (en) * | 2014-10-17 | 2019-06-11 | 日商可樂麗股份有限公司 | Vinyl alcohol-based polymer and use thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| ZA78908B (en) | 1979-02-28 |
| DE2806328A1 (en) | 1978-08-24 |
| NL7701688A (en) | 1978-08-21 |
| FR2381130A1 (en) | 1978-09-15 |
| IT1095421B (en) | 1985-08-10 |
| IT7820332A0 (en) | 1978-02-16 |
| SE7801802L (en) | 1978-08-17 |
| ES467600A1 (en) | 1979-09-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee | ||
| PCNP | Patent ceased through non-payment of renewal fee |