GB1590399A - Starch latex cast coating for paper - Google Patents

Starch latex cast coating for paper Download PDF

Info

Publication number
GB1590399A
GB1590399A GB4426977A GB4426977A GB1590399A GB 1590399 A GB1590399 A GB 1590399A GB 4426977 A GB4426977 A GB 4426977A GB 4426977 A GB4426977 A GB 4426977A GB 1590399 A GB1590399 A GB 1590399A
Authority
GB
United Kingdom
Prior art keywords
parts
composition
latexes
angstroms
particle size
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
Application number
GB4426977A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Champion International Corp
Original Assignee
Champion International Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from US05/762,522 external-priority patent/US4109056A/en
Application filed by Champion International Corp filed Critical Champion International Corp
Publication of GB1590399A publication Critical patent/GB1590399A/en
Expired legal-status Critical Current

Links

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
    • D21H19/10—Coatings without pigments
    • D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
    • D21H19/20—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H19/22—Polyalkenes, e.g. polystyrene
    • 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
    • D21H19/38—Coatings with pigments characterised by the pigments
    • D21H19/385—Oxides, hydroxides or carbonates
    • 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
    • D21H19/38—Coatings with pigments characterised by the pigments
    • D21H19/40—Coatings with pigments characterised by the pigments siliceous, e.g. clays
    • 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
    • D21H19/54—Starch
    • 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
    • D21H19/58—Polymers or oligomers of diolefins, aromatic vinyl monomers or unsaturated acids or derivatives thereof
    • 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/50—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by form
    • D21H21/52—Additives of definite length or shape

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Paper (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Description

(54) STARCH LATEX CAST COATINGS FOR PAPER (71) We, CHAMPION INTERNATIONAL CORPORATION, a corporation of the State of New York, United States of America, having its offices at One Landmark Square, Stamford, Connecticut 06921, United States of America, 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: The present application provides an improvement over the binder composition disclosed and claimed in our earlier application No. 16046/ 76 (Serial Number 1,514,428), wherein we have broadly disclosed components which when combined resulted in a binder composition particularly useful for cast surface coating of paper.
The present application discloses specific formulations of various components which when admixed in the parts by weight herein after disclosed enhances the paper coating process by ensuring drum release of the coatings without impairing the printing quality of the paper, its press performance, its sheet gloss, its water resistance or folding properties.
With the foregoing in mind, we provide in accordance with the present invention an improvement in the composition of claim 1 of Patent Specification No. 1,514,428, the improvement comprising utilizating as the modified starch an acid hydrolyzed hyrdoxyethyl ether cornstarch and as one of the two latexes a dispersed styrene-butadiene polymer having a particle size of from 800 to 1300 angstroms and a solids content of from 45.0 to 47.0%, a maximum 200 mesh residue of about 0.075 gms/900mls., a pH of from 3.8 to 4.8, a maximum Brookfield viscosity of about 100 cps. and a surface tension of from 43.0 to 49.0, the other of the two latexes comprising a dispersed styrene-butadiene polymer having a particle size of from 1350 to 1650 angstroms and a solids content of from 47.0 to 49.0%, a maximum 200 mesh residue of about 0.05 gms/900 mls., a pH of between from 5.5 to 6.5, a maximum Brookfield viscosity of about 300 cps., and a surface tension of from 49.0 to 55.0; said starch and said two latexes being included in relative proportions of about 1:2:2 dry weight basis on said composition.
We have now determined that an acid hydrolyzed hydroxyethyl ether cornstarch is suited to a cast coating composition because it has reduced tendency to gel or retrograde and because of its hydrophilic character. Such starch is commercially available from American Maize Products Co.
Both latexes employed in the coating composition include dispersed styrene-butadiene polymer. Styrene-butadiene latices or latexes and their preparation are well known, and one such latex having the character and properties described herein is a commercially available product of Dow Chemical Company.
Preferably, from 6 to 8 parts of said one latex are employed in the coating composition, calculated on a dry weight basis, and from 6 to 8 parts of said other latex, calculated on a dry weight basis and from 3 to 5 parts of the starch, calculated on a dry weight basis.
As in our earlier application, the preferred form of the coating composition includes an insoluble filler, an inorganic polyphosphate dispersant, an organic dispersant; i.e. a polyacrylate dispersant, an oleaginous release agent and rosin which promotes adhesion of the coating to a paper web, without deleterious effect. The preferred insoluble filler is described in our earlier application as constituting about 85 parts calcium carbonate and about 1 5 parts #2 coating clay.
Preferred inorganic polyphosphate dispersants employed herein are the hexametaphosphates. Among the most preferred hexametaphosphates are sodium hexametaphosphate and zinc substituted sodium hexametaphosphate which are respectively commercially available from Calgon Corporation and from Merck & Company. Preferably, about 0.5 parts, calculated on the dry weight basis, of the inorganic polyphosphate dispersant are employed in the composition.
As the organic dispersant we use an aqueous solution of sodium polyacrylate which is the preferred polyacrylate. Preferably about 0.7 parts, calculated on the dry weight basis, are employed. The sodium polyacrylate dispersants herein contemplated are available from Rohm & Haas Company, Dow Chemical Company and Allied Colloids.
The preferred oleaginous release agent for our improved composition is sulfonated castor oil. From about 1.5 to about 1.75 parts, calculated on the dry weight basis, of the oleginous release agent are preferably employed in the coating composition.
The preferred rosin is an acidic thermoplastic pentaerythritol rosin ester, and particularly the sodium salt thereof. Such rosins are commercial available from Hercules Incorporated. In the most preferred embodiment of the invention about 1.0 parts of the rosin are employed in the composition.
As in our earlier application, the pH of the composition may be adjusted to the desired range by the addition of ammonia thereto.
As formulated, the coating composition preferably has a solids content of 55 to about 60%.
In the general preparation of the coating composition, the heretofore disclosed constituents may be added in any appropriate sequence to a sufficient amount of water to give the desired total solids content and pH thereof.
The examples that follow are merely exemplary of specific embodiments of the invention.
All parts are by dry weight on the composition.
EXAMPLE I.
A coating composition is formulated including, as the modified starch, 3 parts acid hydrolyzed hydroxyethyl ether cornstarch, and as one of the two latexes, 8 parts of the latex including dispersed styrene-butadine polymer of particle size between 800 and 1300 angstroms and a solids content of between 45.0 and 47.0%, a maximum 200 mesh residue of 0.075 gms./900 mls., a pH of 3.8 to 4.8, a maximum Brookfield viscosity of 100 cps and a surface tension of 43.0 to 49.0, and as the other of the two latexes, 8 parts of the latex including dispersed styrene-butadiene polymer of particle size of from 1350 to 1650 angstroms and a solids content of between 47.0 and 49.0, a maximum 200 mesh residue of 0.05 gms.
/900 mls., a pH of between 5.5 and 6.5, a maximum Brookfield viscosity of 300 cps., at a surface tension of from 49.0 to about 55.0; the starch and the two latexes being included in relative proportions of 1:2:2 dry weight basis on said composition.
EXAMPLE II A coating composition is formulated from the ingredients of Example I including however 4 parts acid hydrolyzed hydroxyethyl ether cornstarch, 8 parts of the latex including dispersed styrene-butadiene polymer of particle size between 800 and 1300 angstroms, and 6 parts of the latex including dispersed styrenebutadiene polymer of particle size between 1350 and 1650 angstroms.
EXAMPLE III A coating composition is formulated from the ingredients of Example I including however 5 parts acid hydrolyzed hydroxyethyl ether cornstarch, 6 parts of the latex including dispersed styrene-butadiene polymer of particle size between 800 and 1300 angstroms, and 8 parts of the latex including dispersed styrenebutadiene polymer of particle size between 1350 and 1650 angstroms.
The preferred formulation is that of Example III. With that formulation, the drum release of the coatings is at maximum efficiency.
In employing the formulations in the cast coating of papers, the aqueous coating composition is applied to a paper web and pressed against a rotating heated chromium surface and then dried in the manner described in the main application referred to above. By means of the above described coating compositions there are obtained cast coated papers of high printing quality, press performance, sheet gloss, water resistance, fold, and freedom from curling.
WHAT WE CLAIM IS: 1. A binder composition in accordance with claim 1 of Patent Specification No. 1,514,428, wherein there is utilized as the modified starch an acid hydrolyzed hydroxyethyl ether cornstarch and as one of the two latexes a dispersed styrene-butadiene polymer having a particle size of from 800 to 1300 angstroms and a solids content of from 45.0 to 47.0%, a maximum 200 mesh residue of about 0.075 gms./900 mls., a pH of from 3.8 to 4.8, a maximum Brookfield viscosity of about 100 cps. and a surface tension of from 43.0 to 49.0, the other of the two latexes comprising a dispersed styrene-butadiene polymer having a particle size of from 1350 to 1650 angstroms and a solids content of from 47.0 to 49.0%, a maximum 200 mesh residue of about 0.05 gms.
/900 mls., a pH of from 5.5 to 6.5, a maximum Brookfield viscosity of about 300 cps., and a surface tension of from 49.0 to 55.0; said starch and said two latexes being included in relative proportions of about 1:2:2 dry weight basis on said composition.
2. A composition as claimed in claim 1 wherein from 3 to 5 parts of the modified starch, from 6 to 8 parts of said one of the two latexes, and from 6 to 8 parts of said other of the two latexes are present, calculated on a dry weight basis.
3. A composition as claimed in claim 1 or claim 2 which includes 0.5 parts of a hexametaphosphate as an inorganic dispersant.
4. A composition as claimed in claim 2, wherein said hexametaphosphate is sodium hexametaphosphate or zinc substituted sodium hexametaphosphate.
5. A composition as claimed in any one of the preceding claims, which includes 0.7 parts
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (9)

**WARNING** start of CLMS field may overlap end of DESC **. solution of sodium polyacrylate which is the preferred polyacrylate. Preferably about 0.7 parts, calculated on the dry weight basis, are employed. The sodium polyacrylate dispersants herein contemplated are available from Rohm & Haas Company, Dow Chemical Company and Allied Colloids. The preferred oleaginous release agent for our improved composition is sulfonated castor oil. From about 1.5 to about 1.75 parts, calculated on the dry weight basis, of the oleginous release agent are preferably employed in the coating composition. The preferred rosin is an acidic thermoplastic pentaerythritol rosin ester, and particularly the sodium salt thereof. Such rosins are commercial available from Hercules Incorporated. In the most preferred embodiment of the invention about 1.0 parts of the rosin are employed in the composition. As in our earlier application, the pH of the composition may be adjusted to the desired range by the addition of ammonia thereto. As formulated, the coating composition preferably has a solids content of 55 to about 60%. In the general preparation of the coating composition, the heretofore disclosed constituents may be added in any appropriate sequence to a sufficient amount of water to give the desired total solids content and pH thereof. The examples that follow are merely exemplary of specific embodiments of the invention. All parts are by dry weight on the composition. EXAMPLE I. A coating composition is formulated including, as the modified starch, 3 parts acid hydrolyzed hydroxyethyl ether cornstarch, and as one of the two latexes, 8 parts of the latex including dispersed styrene-butadine polymer of particle size between 800 and 1300 angstroms and a solids content of between 45.0 and 47.0%, a maximum 200 mesh residue of 0.075 gms./900 mls., a pH of 3.8 to 4.8, a maximum Brookfield viscosity of 100 cps and a surface tension of 43.0 to 49.0, and as the other of the two latexes, 8 parts of the latex including dispersed styrene-butadiene polymer of particle size of from 1350 to 1650 angstroms and a solids content of between 47.0 and 49.0, a maximum 200 mesh residue of 0.05 gms. /900 mls., a pH of between 5.5 and 6.5, a maximum Brookfield viscosity of 300 cps., at a surface tension of from 49.0 to about 55.0; the starch and the two latexes being included in relative proportions of 1:2:2 dry weight basis on said composition. EXAMPLE II A coating composition is formulated from the ingredients of Example I including however 4 parts acid hydrolyzed hydroxyethyl ether cornstarch, 8 parts of the latex including dispersed styrene-butadiene polymer of particle size between 800 and 1300 angstroms, and 6 parts of the latex including dispersed styrenebutadiene polymer of particle size between 1350 and 1650 angstroms. EXAMPLE III A coating composition is formulated from the ingredients of Example I including however 5 parts acid hydrolyzed hydroxyethyl ether cornstarch, 6 parts of the latex including dispersed styrene-butadiene polymer of particle size between 800 and 1300 angstroms, and 8 parts of the latex including dispersed styrenebutadiene polymer of particle size between 1350 and 1650 angstroms. The preferred formulation is that of Example III. With that formulation, the drum release of the coatings is at maximum efficiency. In employing the formulations in the cast coating of papers, the aqueous coating composition is applied to a paper web and pressed against a rotating heated chromium surface and then dried in the manner described in the main application referred to above. By means of the above described coating compositions there are obtained cast coated papers of high printing quality, press performance, sheet gloss, water resistance, fold, and freedom from curling. WHAT WE CLAIM IS:
1. A binder composition in accordance with claim 1 of Patent Specification No. 1,514,428, wherein there is utilized as the modified starch an acid hydrolyzed hydroxyethyl ether cornstarch and as one of the two latexes a dispersed styrene-butadiene polymer having a particle size of from 800 to 1300 angstroms and a solids content of from 45.0 to 47.0%, a maximum 200 mesh residue of about 0.075 gms./900 mls., a pH of from 3.8 to 4.8, a maximum Brookfield viscosity of about 100 cps. and a surface tension of from 43.0 to 49.0, the other of the two latexes comprising a dispersed styrene-butadiene polymer having a particle size of from 1350 to 1650 angstroms and a solids content of from 47.0 to 49.0%, a maximum 200 mesh residue of about 0.05 gms.
/900 mls., a pH of from 5.5 to 6.5, a maximum Brookfield viscosity of about 300 cps., and a surface tension of from 49.0 to 55.0; said starch and said two latexes being included in relative proportions of about 1:2:2 dry weight basis on said composition.
2. A composition as claimed in claim 1 wherein from 3 to 5 parts of the modified starch, from 6 to 8 parts of said one of the two latexes, and from 6 to 8 parts of said other of the two latexes are present, calculated on a dry weight basis.
3. A composition as claimed in claim 1 or claim 2 which includes 0.5 parts of a hexametaphosphate as an inorganic dispersant.
4. A composition as claimed in claim 2, wherein said hexametaphosphate is sodium hexametaphosphate or zinc substituted sodium hexametaphosphate.
5. A composition as claimed in any one of the preceding claims, which includes 0.7 parts
of an aqueous sodium polyacrylate as an organic dispersant.
6. A composition as claimed in any one of the preceding claims, which includes from 1.5 to 1.7 parts of sulfonated caster oil as a release agent.
7. A composition as claimed in any one of the preceding claims which includes a sodium salt of pentaerythritol rosin ester.
8. A composition as claimed in claim 1, substantially as hereinbefore described.
9. A composition substantially as hereinbefore described with reference to any one of the foregoing Examples 1-3.
GB4426977A 1977-01-26 1977-10-25 Starch latex cast coating for paper Expired GB1590399A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/762,522 US4109056A (en) 1975-05-05 1977-01-26 Starch/latex cast coatings for paper

Publications (1)

Publication Number Publication Date
GB1590399A true GB1590399A (en) 1981-06-03

Family

ID=25065308

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4426977A Expired GB1590399A (en) 1977-01-26 1977-10-25 Starch latex cast coating for paper

Country Status (5)

Country Link
JP (1) JPS5394367A (en)
BE (1) BE859286R (en)
CA (1) CA1092737A (en)
DE (1) DE2747301A1 (en)
GB (1) GB1590399A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011124958A1 (en) * 2010-04-07 2011-10-13 Coatex S.A.S. Use of a latex of styrene particles with a size of 100 nm as rheological agent in a coating slip for papermaking, coating slip and method for obtaining a paper coated with this slip

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011124958A1 (en) * 2010-04-07 2011-10-13 Coatex S.A.S. Use of a latex of styrene particles with a size of 100 nm as rheological agent in a coating slip for papermaking, coating slip and method for obtaining a paper coated with this slip
FR2958664A1 (en) * 2010-04-07 2011-10-14 Coatex Sas USING STYRENE LATEX WITH A SIZE OF 100 NM AS A RHEOLOGICAL AGENT IN PAPER-SLEEP SAUCE, SAUCE AND PROCESS FOR OBTAINING SAME
US8790491B2 (en) 2010-04-07 2014-07-29 Coatex Use of a styrene latex 100 nm in size as a rheological agent in a paper coating, the paper coating, and the method for obtaining it

Also Published As

Publication number Publication date
CA1092737A (en) 1980-12-30
BE859286R (en) 1978-03-30
DE2747301A1 (en) 1978-07-27
JPS5394367A (en) 1978-08-18

Similar Documents

Publication Publication Date Title
DE898708C (en) Process for the production of paper coating mixtures
US4109056A (en) Starch/latex cast coatings for paper
EP0192600A1 (en) Aqueous optical brighhtener compositions and their use in paper coatings
US4069188A (en) Copolymers of butadiene and carboxylated styrene
NO850161L (en) LATEXES WITH HIGH SOLID CONTENT FOR PAPER COATING
CA1146708A (en) Aqueous newsprint inks
CA1092736A (en) Starch/latex cast coatings for paper
US2772981A (en) Paper coating composition
US4361669A (en) Coating compositions comprising a reaction product of a dispersed _hydroxy-alkyl modified starch product and a hydrolyzed styrene maleic anhydride copolymer
GB1590399A (en) Starch latex cast coating for paper
GB2028832A (en) Aqueous coating color compositions
AU2001266493B2 (en) Use of alkylhydroxyalkyl cellulose possibly in combination with a carboxymethyl cellulose for the improvement of gloss and printability
EP0024602A1 (en) Aqueous dispersions, their preparation and their use in preparing coating compositions
US3341392A (en) Laminating method and article using carboxylated latex adhesive
US4857110A (en) Agent for improving the printability of paper and board
US5292781A (en) Paper coating composition
AU2001266493A1 (en) Use of alkylhydroxyalkyl cellulose possibly in combination with a carboxymethyl cellulose for the improvement of gloss and printability
JP2002266285A (en) Paper coating agent and method for producing coated paper
JPH0663199B2 (en) Pigment coating composition for paper
DE1696221C3 (en) Binder for paper coating slips on polyvinyl alcohol-B3 747t
JPH0849199A (en) Base paper for wall paper
US2637665A (en) Impregnated paper and method of making same
JP2647306B2 (en) Paper that prevents deterioration
JPH07111040B2 (en) Sizing composition for papermaking
DE2809422C3 (en) Process for the production of a stretchable, smooth or creped paper with high resistance to picking and splitting and its use as a carrier material for pressure-sensitive adhesive layers

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee