EP1088939A1 - Printing paper sizing agent composition - Google Patents

Printing paper sizing agent composition Download PDF

Info

Publication number
EP1088939A1
EP1088939A1 EP00308618A EP00308618A EP1088939A1 EP 1088939 A1 EP1088939 A1 EP 1088939A1 EP 00308618 A EP00308618 A EP 00308618A EP 00308618 A EP00308618 A EP 00308618A EP 1088939 A1 EP1088939 A1 EP 1088939A1
Authority
EP
European Patent Office
Prior art keywords
sizing agent
printing paper
agent composition
paper sizing
group
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.)
Withdrawn
Application number
EP00308618A
Other languages
German (de)
French (fr)
Inventor
Isao Dow Corning Toray Sil. Co. Ltd. Ona
Hiroki Dow Corning Toray Sil. Co. Ltd. Ishikawa
Tadashi Dow Corning Toray Sil. Co. Ltd. Takimoto
Tsutomu Dow Corning Toray Sil. Co. Ltd. Naganawa
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.)
DuPont Toray Specialty Materials KK
Original Assignee
Dow Corning Toray Silicone Co Ltd
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
Application filed by Dow Corning Toray Silicone Co Ltd filed Critical Dow Corning Toray Silicone Co Ltd
Publication of EP1088939A1 publication Critical patent/EP1088939A1/en
Withdrawn legal-status Critical Current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
    • 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
    • D21H21/14—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 function or properties in or on the paper
    • D21H21/16—Sizing or water-repelling agents
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/59—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon

Definitions

  • the present invention relates to a sizing agent composition for printing paper, and more specifically relates to a sizing agent composition for printing paper which improves the printing characteristics and sheet separating characteristics of printing paper.
  • the object of the present invention is to provide a sizing agent composition for printing paper which can provide various types of printing papers such as papers used in black and white electronic copiers used in business applications, papers used in color copiers, papers used in ink jet printers, and receiving papers used in facsimile machines with superior sheet separating characteristics, printing characteristics, and copying characteristics.
  • the present invention is a printing paper sizing agent composition
  • an aqueous emulsion comprising (A) water-insoluble organopolysiloxane comprising (a) an alkyl group or aralkyl group having 2 to 20 carbon atoms, and (b) an amino group in each molecule and (B) a sizing agent.
  • the present invention is a printing paper sizing agent composition
  • an aqueous emulsion comprising (A) water-insoluble organopolysiloxane comprising (a) an alkyl group or aralkyl group having 2 to 20 carbon atoms and (b) an amino group in each molecule and (B) a sizing agent.
  • component (A) is a component which not only improves the sheet separating characteristics by providing the printing paper with release characteristics, lubrication, smoothness, and anti-blocking characteristics, but also improves the water resistance by making the binder component of component (B) hydrophobic, and which also imparts the effect of fixing pigments to ink jet printer media and sublimation type printer media.
  • the organopolysiloxane of component (A) contains at least one (a) alkyl group or aralkyl group having 2 to 20 carbon atoms and (b) amino group per molecule and is water-insoluble.
  • the water insolubility of this component can be assessed by the fact that separation into two layers occurs when component (A) and an equal amount of water are placed in a beaker and agitated and this mixture is allowed to stand for 24 hours.
  • the molecular structure of the organopolysiloxane may be linear, branched or cyclic, and there are no particular restrictions on the type of organopolysiloxane used.
  • Examples of the abovementioned (a) alkyl group or aralkyl group having 2 to 20 carbon atoms include ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, decyl, dodecyl, phenylmethyl, and phenylethyl. It is desirable that the abovementioned (b) amino group(s) be groups in which the nitrogen atom is bonded to a silicon atom via a carbon atom. Specific examples of such amino groups include amino groups described by the formula -Q-(NHCH 2 CH 2 ) a NHR 1 .
  • Q represents a divalent hydrocarbon group: Specific examples of such divalent hydrocarbon groups include alkylene groups such as methylene, ethylene, propylene, and butylene, arylene groups described by formula-C 6 H 4 -, and alkylene-arylene groups described by formula -(CH 2 ) 2 C 6 H 4 -. Among these groups, propylene groups are most commonly used.
  • R 1 represents a hydrogen atom or a monovalent hydrocarbon group; examples of monovalent hydrocarbon groups include methyl, ethyl, propyl, phenyl, and cyclohexyl.
  • a is an integer from 0 to 5, with 0 or one being most common. Groups described by the following formulae may be cited as examples of such amino groups.
  • Linear diorganopolysiloxanes described by the following mean formula may be cited as examples of the organopolysiloxane comprising component (A):
  • R represents a substituted or unsubstituted monovalent hydrocarbon group having 1 to 20 carbon atoms.
  • Such groups include saturated aliphatic hydrocarbon groups such as methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, decyl, and dodecyl; unsaturated aliphatic hydrocarbon groups such as vinyl, allyl, and hexenyl; aromatic hydrocarbon groups such as phenyl, tolyl, and naphthyl; and halogen-substituted hydrocarbon groups in which some of the hydrogen atoms bonded to the carbon atoms of the abovementioned groups are substituted by halogen atoms.
  • methyl groups are most commonly used.
  • R 2 represents an alkyl group or aralkyl group having 2 to 20 carbon atoms; examples of alkyl groups that can be used include ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, decyl, and dodecyl, and examples of aralkyl groups that can be used include phenylmethyl and phenylethyl.
  • the present composition is used for sizing full-color printer paper, ink jet printer paper, or sublimation type printer paper
  • a cycloorganosiloxane which has an alkyl group or aralkyl group having 2 to 20 carbon atoms is used as a copolymerized component.
  • X represents a group selected from the group consisting of substituted or unsubstituted monovalent hydrocarbon groups having 1 to 20 carbon atoms, hydroxy groups, alkoxy groups having 1 to 5 carbon atoms, and amino groups described by formula -Q-(NHCH 2 CH 2 ) a NHR 1 .
  • monovalent hydrocarbon groups that can be used include the same groups as those described for the abovementioned R.
  • alkoxy groups that can be used include methoxy, ethoxy, propoxy, and butoxy.
  • amino groups that can be used include the same groups as those described above.
  • 1 is 0 or an integer equal to or greater than 1.
  • the value of 1 is preferably in the range of 10 to 1000 and is even more preferably in the range of 50 to 500.
  • the value of m is 0 or an integer equal to or greater than 1.
  • the value of m is preferably in the range of 2 to 200 and is even more preferably in the range of 5 to 100.
  • X at the ends of the molecular chain be an alkyl group or aralkyl group having 2 to 20 carbon atoms.
  • the value n is 0 or an integer equal to or greater than 1. It is desirable that n be in the range of 2 to 30 and a range of 2 to 20 is even more desirable.
  • X at the ends of the molecular change be an amino group described by formula -Q-(NHCH 2 CH 2 ) a NHR 1 .
  • R 1 , Q, and a are the same as described above.
  • siloxane units described by formula it is desirable from the standpoints of affinity for pigments and compatibility that siloxane units described by formula be more numerous than siloxane units described by formula
  • the viscosity of the organopolysiloxane comprising component (A) at 25°C is ordinarily in the range of 10 to 10,000 mm 2 /s, and is preferably in the range of 50 to 10,000 mm 2 /s.
  • organopolysiloxane comprising component (A) examples include organopolysiloxanes described by the following formulae: In the above formulae the large circle symbol represents phenyl.
  • the abovementioned organopolysiloxane comprising component (A) can be manufactured by hydrolyzing an aminopropyl(methyl)dialkoxysilane described by formula H 2 N(CH 2 ) 3 Si(CH 3 )(OCH 3 ) 2 in an excess of water, causing the equilibrium polymerization of the hydrolyzed condensate thus obtained with octamethylcyclotetrasiloxane and tetramethyltetradecylcyclotetrasiloxane by heating a mixture of these compounds to a temperature of 80 to 110°C in the presence of a basic catalyst such as sodium hydroxide, and then neutralizing the basic catalyst with an acid at the point in time at which the desired viscosity is reached (see Japanese Patent Application Kokai No. Sho 53-98499).
  • a basic catalyst such as sodium hydroxide
  • the sizing agent comprising component (B) is a binder component which is ordinarily used to fix and hold titanium dioxide, barium sulfate, diatomaceous earth, calcium carbonate, talc, kaolin, silica, alumina or a cationic polymer, etc., on the surface (one side or both sides) of electronic copier papers, coated papers used for facsimile transmission, color printing papers, or papers used as ink jet printing media, etc.
  • substances used as this component (B) include starches such as wheat flour starch, corn starch, rice flour, and potato starch; cellulose derivatives such as casein, carboxymethylcellulose, methylcellulose, and hydroxyethyl; synthetic sizing agents such as polyvinyl alcohols and polyvinyl methyl ethers; polyacrylic acid esters that act as aqueous binders, latexes such as styrene-butadiene rubbers, and urethane emulsions.
  • starches such as wheat flour starch, corn starch, rice flour, and potato starch
  • cellulose derivatives such as casein, carboxymethylcellulose, methylcellulose, and hydroxyethyl
  • synthetic sizing agents such as polyvinyl alcohols and polyvinyl methyl ethers
  • polyacrylic acid esters that act as aqueous binders, latexes such as styrene-butadiene rubbers, and urethane emulsions.
  • sizing agents (B-1) that have an emulsifying capacity are carboxymethylcellulose, methylcellulose, and polyvinyl alcohols; all other sizing agents are sizing agents (B-2) that have no emulsifying capacity.
  • desirable examples of component (B) include casein and cellulose derivatives such as carboxymethylcellulose, methylcellulose and hydroxyethylcellulose, as well as polyvinyl alcohols, polyvinyl methyl ethers, and polyacrylic acid esters.
  • Sizing agents (B-1) that have an emulsifying capacity, such as carboxymethylcellulose, methylcellulose, and polyvinyl alcohols are most desirable.
  • the abovementioned aqueous emulsion can be prepared without using a surfactant.
  • a uniform, stable emulsion can be obtained by dissolving or dispersing a polyvinyl alcohol constituting component (B-1) in water, adding component (A) to this solution or dispersion, and then mixing these components or passing the mixture through an emulsifying machine.
  • component (B-1) and a surfactant (D) that has an emulsifying capacity may be used in combination.
  • a surfactant (D) that has an emulsifying capacity is required.
  • the organopolysiloxane comprising component (A) be mixed with the sizing agent of component (B-2) after component (A) is emulsified using a nonionic surfactant alone, or a mixture of a nonionic surfactant and a cationic surfactant, as the surfactant of component (D).
  • the method used to emulsify component (A) beforehand is ordinarily a method in which component (A) and component (D) are blended together, after which a small amount of water is added, and emulsification is performed by means of an emulsifying machine such as a colloid mill, homo-mixer, or line mixer.
  • an emulsifying machine such as a colloid mill, homo-mixer, or line mixer.
  • nonionic surfactants include polyoxyethylene alkyl ethers, polyoxyethylene alkylphenol ethers, polyoxyalkylene alkyl esters, and sorbitan alkyl esters.
  • a quaternary ammonium salt type surfactant is most typically used as a cationic surfactant.
  • a desirable emulsion can be obtained by mixing 3 to 5 parts by weight of a nonionic surfactant, 0 to 1.5 parts by weight of a cationic surfactant, and 73.5 to 77 parts by weight of water with 20 parts by weight of component (A).
  • component (B) is ordinarily used after being dispersed in water.
  • the water used in the present invention is used to dilute and uniformly disperse the abovementioned component (A) and component (B).
  • This component is indispensable for applying the composition of the present invention to the surface of the printing paper as a thin coating.
  • the present composition is an aqueous emulsion which contains the abovementioned component (A) and component (B) as essential components; however, depending on the purpose and intended use of the printing paper involved, fillers and trifunctional aminosilanes may be added in order to increase the strength of the printing paper.
  • fillers include titanium dioxide, barium sulfate, diatomaceous earth, calcium carbonate, talc, kaolin, silica, alumina, and cationic polymers.
  • trifunctional aminosilanes examples include the alkoxysilanes described by the following formulae: Formula: (C 2 H 5 O) 3 SiC 3 H 6 NH 2 Formula: (CH 3 O) 3 SiC 3 H 6 NHC 2 H 4 NH 2
  • the mixture ratios of the respective components in the present composition vary according to the types and amounts of the components used and are not particularly restricted. However, it is desirable that the organopolysiloxane comprising component (A) comprise 3 to 40 wt % of the composition, that the sizing agent of component (B) comprise 3 to 10 wt % of the composition, and that the remaining 50 to 94 wt % of the composition be water. It is desirable that a stock solution of the present composition be prepared at these mixture proportions and that this stock solution be diluted with a 10- to 100-fold amount of water at the time of use, with an appropriate amount of the sizing agent of component (B) being added if necessary.
  • Examples of methods which can be used to apply the present composition to a printing paper include a method in which the printing paper is immersed in a water-diluted solution of the present composition, a method in which a water-diluted solution of the present composition is applied to the printing paper as a coating, a method in which the present composition is added prior to the papermaking process, and a method in which a water-diluted solution of the present composition is sprayed onto the printing paper.
  • the abovementioned coating method is optimal; a small amount of the present composition can be applied as a thin, uniform coating by using, for example, an air doctor coater, blade coater, transfer roll coater, bar coating, or reverse roll coater.
  • printing papers to which the present composition can be applied include not only papers consisting of virgin pulp and recycled papers, but also synthetic papers such as polypropylene and polystyrene papers.
  • Printing papers treated with the present composition are superior in terms of smoothness, lubrication, water resistance, and anti-blocking properties. Accordingly, even in the case of high-speed continuous copying by means of an electronic copier under conditions of high humidity, there is no superimposition of sheets during printing, so that the sheet separating characteristics are extremely good. As a result, in the case of heat-sensitive facsimile paper using the present composition, facsimile transmissions can be performed by re-utilizing receiving paper "as is”. Furthermore, in the case of full-color copies the printing characteristics and copying characteristics are greatly improved and the carrying of pigments is also good so that vivid color copies can be obtained.
  • the present sizing agent composition is suitable for use not only on papers used for the recording of business information such as printing papers used in black and white or color electronic copiers and heat-sensitive papers used in facsimile machines, but also on ink jet printer media and sublimation type printer media.
  • Working Example 1 30 Parts by weight of a water-insoluble diorganopolysiloxane with a viscosity of 1050 mm 2 /s, which contained amino groups and long-chain alkyl groups, and which is described by mean formula was mixed for 30 minutes with an aqueous solution prepared beforehand by uniformly dissolving and dispersing 3 parts of a polyvinyl alcohol (manufactured by Nippon Gosei K.K., 1:1 mixture of Gosenol GL14 and GL05 (commercial names)). Afterward, an aqueous emulsion was prepared by passing this mixture through a colloid mill type emulsifying machine.
  • a polyvinyl alcohol manufactured by Nippon Gosei K.K., 1:1 mixture of Gosenol GL14 and GL05 (commercial names)
  • Treatment solution A (0.3% diorganopolysiloxane, 0.03% polyvinyl alcohol, 99.67% water) which was prepared by adding water to the abovementioned aqueous emulsion so that the emulsion was diluted 100 times was uniformly sprayed by means of a simple spray gun onto an A4 size recycled paper (Bright Recycled Paper manufactured by Fuji Xerox Office Supply Co.) so that the amount of treatment solution A applied was 5g per m 2 , and this coated paper was dried (the amount of adhering diorganopolysiloxane was 0.015 g/m 2 , and the amount of adhering polyvinyl alcohol was 0.0015 g/m 2 ).
  • Comparative Example 1 When copying was performed in the same manner as in Working Example 1 using recycled paper that was not treated with the abovementioned aqueous emulsion, the black and white characters were very slightly broken up, and the sharpness of the photographs was also slightly inferior to that in the copies obtained in Working Example 1.
  • Comparative Example 2 An aqueous emulsion was prepared in the same manner as in Working Example 1, except that an amino-group-containing diorganopolysiloxane described by mean formula was used instead of the diorganopolysiloxane containing amino groups and long-chain alkyl groups used in Working Example 1. A recycled paper was treated with this emulsion in the same manner as in Working Example 1. Copying was performed in the same manner as in Working Example 1 using the recycled paper thus obtained. A slight amount of discoloration occurred so that sharp color copying could not be achieved.
  • Comparative Example 3 An aqueous emulsion was prepared in the same manner as in Working Example 1, except that a dimethylpolysiloxane described by mean formula was used instead of the diorganopolysiloxane containing amino groups and long-chain alkyl groups used in Working Example 1. A recycled paper was treated with this emulsion in the same manner as in Working Example 1. Copying was performed in the same manner as in Working Example 1 using the recycled paper thus obtained. A slight amount of discoloration occurred so that sharp color copying could not be achieved.
  • dimethylpolysiloxane had a low affinity and compatibility with pigments such as the red, yellow, and blue pigments used in full-color copying, so that this dimethylpolysiloxane had a poor ability to adapt to color printing paper.
  • Treatment solution A prepared in Working Example 1 was uniformly blown (by means of a simple spray gun) onto the printing surface of a heat-sensitive facsimile recording paper (FAX-T210B-30 manufactured by Tokuyo K.K. (high sensitivity, A4 size width, continuous roll)) which had been spread and extended to a length of approximately 3 m, so that the amount of treatment solution A applied as a coating was 5 g per square meter. Afterward, this coating was dried. When the paper was subsequently rolled up and set in a facsimile machine, and a transmission consisting of three sheets of A4 size paper was received, there were no breaks in the characters, and clear printing was accomplished.
  • a heat-sensitive facsimile recording paper FAX-T210B-30 manufactured by Tokuyo K.K. (high sensitivity, A4 size width, continuous roll)
  • Comparative Example 4 Three sheets of heat-sensitive recording paper for facsimile use which had not been treated with the abovementioned aqueous emulsion, were stacked together and several transmissions were made with a facsimile machine in the same manner as in Working Example 2. As a result, the three sheets were transmitted while still stacked together, or the first sheet was smoothly transmitted while the second and third sheets were transmitted while still stacked together so that the complete text could not be transmitted.
  • Treatment solution B which was prepared by diluting the abovementioned aqueous emulsion with a 20-fold amount of water, was uniformly sprayed by means of a simple spray gun onto the printing surface of a heat-sensitive recording paper (manufactured by Tokuyo K.K.; FAX-T210B-30 (high sensitivity, A4 width, continuous roll) that was spread to a length of approximately 3 m so that the amount of treatment solution B that was applied was 5 g per m 2 .
  • This coated paper was then dried (the amount of adhering diorganopolysiloxane was 0.025 g/m 2 and the amount of adhering methylcellulose was 0.0125 g/m 2 ).

Landscapes

  • Paper (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

A printing paper sizing agent composition comprising an aqueous emulsion comprising (A) a water-insoluble organopolysiloxane comprising (a) alkyl group or aralkyl group having 2 to 20 carbon atoms, and (b) amino group in the molecule and (B) a sizing agent. The composition provides various types of printing papers such as office-use black and white electronic copier papers, color copier papers, ink jet printer papers, and facsimile receiving papers with superior sheet separation characteristics, printing characteristics, and copying characteristics.

Description

The present invention relates to a sizing agent composition for printing paper, and more specifically relates to a sizing agent composition for printing paper which improves the printing characteristics and sheet separating characteristics of printing paper.
Conventionally, when printing is performed by an electronic copier using recycled paper, especially in the rainy season when the humidity is high, problems such as the simultaneous feeding of two sheets due to a deterioration in the sheet separating characteristics, and the breaking of printed characters due to a deterioration in the printing characteristics, are encountered. Furthermore in cases where a facsimile transmission is performed with several sheets of facsimile paper in a stack, the transmission may be made with two or three sheets superimposed if the sheet separating characteristics are poor so that the entire text is not transmitted. One cause of such problems is that the tacky adhesion of the sizing component (sizing agent), such as a polyvinyl alcohol, starch sizing, or carboxymethylcellulose applied to the surface of the paper increases as the humidity rises. In order to prevent such problems a method has been proposed in which a polyalkylsiloxane modified by means of carboxyl groups, hydroxy groups, epoxy groups, amino groups, isocyanate groups, thioether groups, or mercapto groups, etc., is used as an offset-preventing liquid (see Japanese Patent Application Kokoku No. Sho 58-52589). Furthermore, a method in which a recording paper is coated with a pigment, a polyvinyl alcohol, and a silicone emulsion (see Japanese Patent Application Kokoku No. Hei 3-24908), a method in which a silicone oil is introduced into a thermally fusible ink layer (see Japanese Patent Application Kokai No. Hei 3-42280), and a method in which a coating liquid prepared by dissolving an organic resin and a silicone oil in an organic solvent is applied as a coating to a heat-transfer recording paper (see Japanese Patent Application Kokai No. Hei 4-142989) are also known.
However in methods that use a modified polyalkylsiloxane as an offset-preventing liquid (see Japanese Patent Application Kokoku No. Sho 58-52589), the heating roll wears down if copying is continued for a long period of time, so that the surface of the roll becomes rough, and the release properties gradually deteriorate. Furthermore, in the case of methods that use a silicone emulsion (see Japanese Patent Application Kokoku No. Hei 3-24908), the emulsion is destroyed by most compounding agents, and in the case of methods that use an organic solvent (see Japanese Patent Application Kokai No. Hei 4-142989) caution must be exercised regarding contamination of the environment and the occurrence of fire. In the case of such methods, furthermore, various types of printing papers cannot be provided with sufficient paper handling characteristics or printing characteristics in the case of color copying. For example, in cases where a facsimile transmission is performed using several sheets of received paper "as is" in a facsimile machine, the transmission is sent out with two or three sheets superimposed, so that the entire text cannot be transmitted.
For such reasons, an improvement in paper handling characteristics and printing characteristics is to be desired. In particular, there is a demand for superior paper handling characteristics which are such that received paper can be re-utilized in a facsimile machine.
Specifically, the object of the present invention is to provide a sizing agent composition for printing paper which can provide various types of printing papers such as papers used in black and white electronic copiers used in business applications, papers used in color copiers, papers used in ink jet printers, and receiving papers used in facsimile machines with superior sheet separating characteristics, printing characteristics, and copying characteristics.
The present invention is a printing paper sizing agent composition comprising an aqueous emulsion comprising (A) water-insoluble organopolysiloxane comprising (a) an alkyl group or aralkyl group having 2 to 20 carbon atoms, and (b) an amino group in each molecule and (B) a sizing agent.
The present invention is a printing paper sizing agent composition comprising an aqueous emulsion comprising (A) water-insoluble organopolysiloxane comprising (a) an alkyl group or aralkyl group having 2 to 20 carbon atoms and (b) an amino group in each molecule and (B) a sizing agent.
To describe the respective components of the present invention in detail, component (A) is a component which not only improves the sheet separating characteristics by providing the printing paper with release characteristics, lubrication, smoothness, and anti-blocking characteristics, but also improves the water resistance by making the binder component of component (B) hydrophobic, and which also imparts the effect of fixing pigments to ink jet printer media and sublimation type printer media. The organopolysiloxane of component (A) contains at least one (a) alkyl group or aralkyl group having 2 to 20 carbon atoms and (b) amino group per molecule and is water-insoluble. The water insolubility of this component can be assessed by the fact that separation into two layers occurs when component (A) and an equal amount of water are placed in a beaker and agitated and this mixture is allowed to stand for 24 hours. The molecular structure of the organopolysiloxane may be linear, branched or cyclic, and there are no particular restrictions on the type of organopolysiloxane used. Examples of the abovementioned (a) alkyl group or aralkyl group having 2 to 20 carbon atoms include ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, decyl, dodecyl, phenylmethyl, and phenylethyl. It is desirable that the abovementioned (b) amino group(s) be groups in which the nitrogen atom is bonded to a silicon atom via a carbon atom. Specific examples of such amino groups include amino groups described by the formula -Q-(NHCH2CH2)aNHR1. In this formula, Q represents a divalent hydrocarbon group: Specific examples of such divalent hydrocarbon groups include alkylene groups such as methylene, ethylene, propylene, and butylene, arylene groups described by formula-C6H4-, and alkylene-arylene groups described by formula -(CH2)2C6H4-. Among these groups, propylene groups are most commonly used. R1 represents a hydrogen atom or a monovalent hydrocarbon group; examples of monovalent hydrocarbon groups include methyl, ethyl, propyl, phenyl, and cyclohexyl. In the above formula, a is an integer from 0 to 5, with 0 or one being most common. Groups described by the following formulae may be cited as examples of such amino groups.
Figure 00040001
Linear diorganopolysiloxanes described by the following mean formula may be cited as examples of the organopolysiloxane comprising component (A):
Figure 00040002
In the above formula, R represents a substituted or unsubstituted monovalent hydrocarbon group having 1 to 20 carbon atoms. Specific examples of such groups include saturated aliphatic hydrocarbon groups such as methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, decyl, and dodecyl; unsaturated aliphatic hydrocarbon groups such as vinyl, allyl, and hexenyl; aromatic hydrocarbon groups such as phenyl, tolyl, and naphthyl; and halogen-substituted hydrocarbon groups in which some of the hydrogen atoms bonded to the carbon atoms of the abovementioned groups are substituted by halogen atoms. Among these groups, methyl groups are most commonly used. It is not necessary that the abovementioned R be the same within each molecule; two or more types of groups may be used in combination. R2 represents an alkyl group or aralkyl group having 2 to 20 carbon atoms; examples of alkyl groups that can be used include ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, decyl, and dodecyl, and examples of aralkyl groups that can be used include phenylmethyl and phenylethyl. In particular, in cases where the present composition is used for sizing full-color printer paper, ink jet printer paper, or sublimation type printer paper, it is desirable from the standpoint of affinity and compatibility with red, yellow, blue, and black printing pigments that the number of carbon atoms in R2 be in the range of 6 to 15, and a range of 8 to 14 is even more desirable. Ordinarily, in order to introduce this R2 onto the molecule, a cycloorganosiloxane which has an alkyl group or aralkyl group having 2 to 20 carbon atoms is used as a copolymerized component. For example, this cycloorganosiloxane can be synthesized by the addition reaction of α-methylstyrene or an α-olefin described by formula CH2=CH(CH2)9CH3 with methylhydrogencyclotetrasiloxane described by formula
Figure 00060001
using a catalyst such as chloroplatinic acid.
In the above formula for the polyorganosiloxane comprising component (A), X represents a group selected from the group consisting of substituted or unsubstituted monovalent hydrocarbon groups having 1 to 20 carbon atoms, hydroxy groups, alkoxy groups having 1 to 5 carbon atoms, and amino groups described by formula -Q-(NHCH2CH2)aNHR1. Examples of monovalent hydrocarbon groups that can be used include the same groups as those described for the abovementioned R. Examples of alkoxy groups that can be used include methoxy, ethoxy, propoxy, and butoxy. Examples of amino groups that can be used include the same groups as those described above. In the above formula for the polyorganosiloxane, 1 is 0 or an integer equal to or greater than 1. The value of 1 is preferably in the range of 10 to 1000 and is even more preferably in the range of 50 to 500. The value of m is 0 or an integer equal to or greater than 1. The value of m is preferably in the range of 2 to 200 and is even more preferably in the range of 5 to 100. However, in cases where m is 0, it is necessary that X at the ends of the molecular chain be an alkyl group or aralkyl group having 2 to 20 carbon atoms. The value n is 0 or an integer equal to or greater than 1. It is desirable that n be in the range of 2 to 30 and a range of 2 to 20 is even more desirable. However, in cases where n is 0, it is necessary that X at the ends of the molecular change be an amino group described by formula -Q-(NHCH2CH2)aNHR1. R1, Q, and a are the same as described above. Furthermore, in the abovementioned mean formula, it is desirable from the standpoints of affinity for pigments and compatibility that siloxane units described by formula
Figure 00070001
be more numerous than siloxane units described by formula
Figure 00070002
The viscosity of the organopolysiloxane comprising component (A) at 25°C is ordinarily in the range of 10 to 10,000 mm2/s, and is preferably in the range of 50 to 10,000 mm2/s.
Examples of the organopolysiloxane comprising component (A) include organopolysiloxanes described by the following formulae:
Figure 00080001
In the above formulae the large circle symbol represents phenyl.
The abovementioned organopolysiloxane comprising component (A) can be manufactured by hydrolyzing an aminopropyl(methyl)dialkoxysilane described by formula H2N(CH2)3Si(CH3)(OCH3)2 in an excess of water, causing the equilibrium polymerization of the hydrolyzed condensate thus obtained with octamethylcyclotetrasiloxane and tetramethyltetradecylcyclotetrasiloxane by heating a mixture of these compounds to a temperature of 80 to 110°C in the presence of a basic catalyst such as sodium hydroxide, and then neutralizing the basic catalyst with an acid at the point in time at which the desired viscosity is reached (see Japanese Patent Application Kokai No. Sho 53-98499).
The sizing agent comprising component (B) is a binder component which is ordinarily used to fix and hold titanium dioxide, barium sulfate, diatomaceous earth, calcium carbonate, talc, kaolin, silica, alumina or a cationic polymer, etc., on the surface (one side or both sides) of electronic copier papers, coated papers used for facsimile transmission, color printing papers, or papers used as ink jet printing media, etc. Examples of substances used as this component (B) include starches such as wheat flour starch, corn starch, rice flour, and potato starch; cellulose derivatives such as casein, carboxymethylcellulose, methylcellulose, and hydroxyethyl; synthetic sizing agents such as polyvinyl alcohols and polyvinyl methyl ethers; polyacrylic acid esters that act as aqueous binders, latexes such as styrene-butadiene rubbers, and urethane emulsions. Among these, sizing agents (B-1) that have an emulsifying capacity are carboxymethylcellulose, methylcellulose, and polyvinyl alcohols; all other sizing agents are sizing agents (B-2) that have no emulsifying capacity. Furthermore, desirable examples of component (B) include casein and cellulose derivatives such as carboxymethylcellulose, methylcellulose and hydroxyethylcellulose, as well as polyvinyl alcohols, polyvinyl methyl ethers, and polyacrylic acid esters. Sizing agents (B-1) that have an emulsifying capacity, such as carboxymethylcellulose, methylcellulose, and polyvinyl alcohols are most desirable. In cases where such sizing agents (B-1) that have an emulsifying capacity are used, the abovementioned aqueous emulsion can be prepared without using a surfactant. In such cases, a uniform, stable emulsion can be obtained by dissolving or dispersing a polyvinyl alcohol constituting component (B-1) in water, adding component (A) to this solution or dispersion, and then mixing these components or passing the mixture through an emulsifying machine. Furthermore, component (B-1) and a surfactant (D) that has an emulsifying capacity may be used in combination. In cases where a sizing agent (B-2) that does not have an emulsifying capacity is used, a surfactant (D) that has an emulsifying capacity is required. In such cases, it is desirable that the organopolysiloxane comprising component (A) be mixed with the sizing agent of component (B-2) after component (A) is emulsified using a nonionic surfactant alone, or a mixture of a nonionic surfactant and a cationic surfactant, as the surfactant of component (D). The method used to emulsify component (A) beforehand is ordinarily a method in which component (A) and component (D) are blended together, after which a small amount of water is added, and emulsification is performed by means of an emulsifying machine such as a colloid mill, homo-mixer, or line mixer. Examples of nonionic surfactants that can be used include polyoxyethylene alkyl ethers, polyoxyethylene alkylphenol ethers, polyoxyalkylene alkyl esters, and sorbitan alkyl esters. A quaternary ammonium salt type surfactant is most typically used as a cationic surfactant. For example, a desirable emulsion can be obtained by mixing 3 to 5 parts by weight of a nonionic surfactant, 0 to 1.5 parts by weight of a cationic surfactant, and 73.5 to 77 parts by weight of water with 20 parts by weight of component (A). The abovementioned component (B) is ordinarily used after being dispersed in water.
The water used in the present invention is used to dilute and uniformly disperse the abovementioned component (A) and component (B). This component is indispensable for applying the composition of the present invention to the surface of the printing paper as a thin coating.
The present composition is an aqueous emulsion which contains the abovementioned component (A) and component (B) as essential components; however, depending on the purpose and intended use of the printing paper involved, fillers and trifunctional aminosilanes may be added in order to increase the strength of the printing paper. Examples of fillers that can be used include titanium dioxide, barium sulfate, diatomaceous earth, calcium carbonate, talc, kaolin, silica, alumina, and cationic polymers. Examples of trifunctional aminosilanes that can be used include the alkoxysilanes described by the following formulae: Formula:   (C2H5O)3SiC3H6NH2 Formula:   (CH3O)3SiC3H6NHC2H4NH2
The mixture ratios of the respective components in the present composition vary according to the types and amounts of the components used and are not particularly restricted. However, it is desirable that the organopolysiloxane comprising component (A) comprise 3 to 40 wt % of the composition, that the sizing agent of component (B) comprise 3 to 10 wt % of the composition, and that the remaining 50 to 94 wt % of the composition be water. It is desirable that a stock solution of the present composition be prepared at these mixture proportions and that this stock solution be diluted with a 10- to 100-fold amount of water at the time of use, with an appropriate amount of the sizing agent of component (B) being added if necessary.
Examples of methods which can be used to apply the present composition to a printing paper include a method in which the printing paper is immersed in a water-diluted solution of the present composition, a method in which a water-diluted solution of the present composition is applied to the printing paper as a coating, a method in which the present composition is added prior to the papermaking process, and a method in which a water-diluted solution of the present composition is sprayed onto the printing paper. Among these methods, the abovementioned coating method is optimal; a small amount of the present composition can be applied as a thin, uniform coating by using, for example, an air doctor coater, blade coater, transfer roll coater, bar coating, or reverse roll coater. Depending on the printing paper and intended application, single-stage coating, two-stage coating, or multi-stage coating consisting of more than two stages may be used. Furthermore, printing papers to which the present composition can be applied include not only papers consisting of virgin pulp and recycled papers, but also synthetic papers such as polypropylene and polystyrene papers.
Printing papers treated with the present composition are superior in terms of smoothness, lubrication, water resistance, and anti-blocking properties. Accordingly, even in the case of high-speed continuous copying by means of an electronic copier under conditions of high humidity, there is no superimposition of sheets during printing, so that the sheet separating characteristics are extremely good. As a result, in the case of heat-sensitive facsimile paper using the present composition, facsimile transmissions can be performed by re-utilizing receiving paper "as is". Furthermore, in the case of full-color copies the printing characteristics and copying characteristics are greatly improved and the carrying of pigments is also good so that vivid color copies can be obtained. The present sizing agent composition is suitable for use not only on papers used for the recording of business information such as printing papers used in black and white or color electronic copiers and heat-sensitive papers used in facsimile machines, but also on ink jet printer media and sublimation type printer media.
Next, the present invention will be described in detail in terms of working examples. In the working examples, all parts and % indicate parts by weight and wt %. Viscosity values shown are values measured at 25°C. The diorganopolysiloxane represented by the following formula, which was used in the working examples, separated into two layers after being allowed to stand for 24 hours following agitation with an equal amount of water at room temperature. In the formula, the large circle symbol represents phenyl.
Figure 00130001
Working Example 1. 30 Parts by weight of a water-insoluble diorganopolysiloxane with a viscosity of 1050 mm2/s, which contained amino groups and long-chain alkyl groups, and which is described by mean formula
Figure 00130002
was mixed for 30 minutes with an aqueous solution prepared beforehand by uniformly dissolving and dispersing 3 parts of a polyvinyl alcohol (manufactured by Nippon Gosei K.K., 1:1 mixture of Gosenol GL14 and GL05 (commercial names)). Afterward, an aqueous emulsion was prepared by passing this mixture through a colloid mill type emulsifying machine. Treatment solution A (0.3% diorganopolysiloxane, 0.03% polyvinyl alcohol, 99.67% water) which was prepared by adding water to the abovementioned aqueous emulsion so that the emulsion was diluted 100 times was uniformly sprayed by means of a simple spray gun onto an A4 size recycled paper (Bright Recycled Paper manufactured by Fuji Xerox Office Supply Co.) so that the amount of treatment solution A applied was 5g per m2, and this coated paper was dried (the amount of adhering diorganopolysiloxane was 0.015 g/m2, and the amount of adhering polyvinyl alcohol was 0.0015 g/m2). When black and white characters and color photographs were color-copied by means of a full-color electronic copier (A-Color 628 manufactured by Fuji Xerox K.K.) using the recycled paper treated as described above, sharp copies were produced with no breaking up of the characters or photographs.
Comparative Example 1. When copying was performed in the same manner as in Working Example 1 using recycled paper that was not treated with the abovementioned aqueous emulsion, the black and white characters were very slightly broken up, and the sharpness of the photographs was also slightly inferior to that in the copies obtained in Working Example 1.
Comparative Example 2. An aqueous emulsion was prepared in the same manner as in Working Example 1, except that an amino-group-containing diorganopolysiloxane described by mean formula
Figure 00140001
was used instead of the diorganopolysiloxane containing amino groups and long-chain alkyl groups used in Working Example 1. A recycled paper was treated with this emulsion in the same manner as in Working Example 1. Copying was performed in the same manner as in Working Example 1 using the recycled paper thus obtained. A slight amount of discoloration occurred so that sharp color copying could not be achieved. As a result, it was found that the abovementioned amino-group-containing diorganopolysiloxane had a low affinity and compatibility with pigments such as the red, yellow, and blue pigments used in full-color copying, so that this diorganopolysiloxane had a poor ability to adapt to color printing paper.
Comparative Example 3. An aqueous emulsion was prepared in the same manner as in Working Example 1, except that a dimethylpolysiloxane described by mean formula
Figure 00150001
was used instead of the diorganopolysiloxane containing amino groups and long-chain alkyl groups used in Working Example 1. A recycled paper was treated with this emulsion in the same manner as in Working Example 1. Copying was performed in the same manner as in Working Example 1 using the recycled paper thus obtained. A slight amount of discoloration occurred so that sharp color copying could not be achieved. As a result, it was found that the abovementioned dimethylpolysiloxane had a low affinity and compatibility with pigments such as the red, yellow, and blue pigments used in full-color copying, so that this dimethylpolysiloxane had a poor ability to adapt to color printing paper.
Working Example 2. Treatment solution A prepared in Working Example 1 was uniformly blown (by means of a simple spray gun) onto the printing surface of a heat-sensitive facsimile recording paper (FAX-T210B-30 manufactured by Tokuyo K.K. (high sensitivity, A4 size width, continuous roll)) which had been spread and extended to a length of approximately 3 m, so that the amount of treatment solution A applied as a coating was 5 g per square meter. Afterward, this coating was dried. When the paper was subsequently rolled up and set in a facsimile machine, and a transmission consisting of three sheets of A4 size paper was received, there were no breaks in the characters, and clear printing was accomplished. Furthermore, these three received sheets were stacked and set in a facsimile machine (Speac 23TA machine manufactured by NEC K.K.), and a transmission was sent to another station. In spite of the fact that this transmission was performed at a high humidity of 87%, all three sheets were transmitted in order one at a time, and the entire text was smoothly transmitted. It was ascertained from these results that printing paper treated with the composition of the present invention has improved smoothness and lubrication and shows a decrease in tack so that the paper has superior sheet separating characteristics.
Comparative Example 4. Three sheets of heat-sensitive recording paper for facsimile use which had not been treated with the abovementioned aqueous emulsion, were stacked together and several transmissions were made with a facsimile machine in the same manner as in Working Example 2. As a result, the three sheets were transmitted while still stacked together, or the first sheet was smoothly transmitted while the second and third sheets were transmitted while still stacked together so that the complete text could not be transmitted.
Working Example 3. 5 Parts of a polyoxyethylene (6 mol) lauryl ether surfactant was added to 20 parts of a water-insoluble diorganopolysiloxane with a viscosity of 1110 mm2/s which contained amino groups and aralkyl groups, and which was described by mean formula
Figure 00170001
and these ingredients were mixed for 20 minutes. Next, 75 parts of water were added in three batches over a period of 60 minutes, and the resulting mixture was mixed to produce an emulsion. An aqueous emulsion was prepared by adding 100 parts of an aqueous solution of methylcellulose (an aqueous solution prepared by mixing 10 parts of methylcellulose and 90 parts of water, and uniformly dissolving and dispersing these ingredients over a period of two hours). Treatment solution B, which was prepared by diluting the abovementioned aqueous emulsion with a 20-fold amount of water, was uniformly sprayed by means of a simple spray gun onto the printing surface of a heat-sensitive recording paper (manufactured by Tokuyo K.K.; FAX-T210B-30 (high sensitivity, A4 width, continuous roll) that was spread to a length of approximately 3 m so that the amount of treatment solution B that was applied was 5 g per m2. This coated paper was then dried (the amount of adhering diorganopolysiloxane was 0.025 g/m2 and the amount of adhering methylcellulose was 0.0125 g/m2). Afterward, when the paper was rolled up and set in a facsimile machine and a transmission of 3 A4 size sheets was received, clear printing was obtained with no break-up of characters. The three sheets that were received were stacked and set in a facsimile machine (manufactured by NEC; Speac 23TA model), and were transmitted to another station. In spite of the fact that this was done at a high humidity of 87%, the three sheets were transmitted in order one at a time, so that the entire text was smoothly transmitted. It was thus demonstrated that a printing paper treated with the composition of the present invention has improved smoothness and slip properties, and that tacky adhesion is decreased so that superior sheet separation characteristics are obtained.

Claims (15)

  1. A printing paper sizing agent composition comprising an aqueous emulsion comprising (A) a water-insoluble organpolysiloxane comprising (a) an alkyl group or aralkyl group having 2 to 20 carbon atoms, and (b) an amino group in each molecule and (B) a sizing agent.
  2. The printing paper sizing agent composition of claim 1, where the sizing agent has emulsifying capacity.
  3. The printing paper sizing agent composition of claim 1 or claim 2 further comprising (C) a surfactant that has emulsifying capacity.
  4. The printing paper sizing agent composition of any of claims 1 to 3, where the amino group is bonded to a silicon atom via a carbon atom.
  5. The printing paper sizing agent composition of any of claims 1 to 3, wherein the amino group is
    described by formula -Q-(NHCH2CH2)aNHR1, where Q represents a divalent hydrocarbon group, R1 represents a hydrogen atom or a monovalent hydrocarbon group, and a is an integer from 0 to 5.
  6. The printing paper sizing agent composition of any of claims 1 to 3, where the organopolysiloxane is described by formula
    Figure 00200001
    where R represents a substituted or unsubstituted monovalent hydrocarbon group having 1 to 20 carbon atoms, R1 represent hydrogen or a monovalent hydrocarbon group, R2 represents an alkyl group or aralkyl group having 2 to 20 carbon atoms, X represents a group selected from the group consisting of substituted and unsubstituted monovalent hydrocarbon groups having 1 to 20 carbon atoms, hydroxy groups, alkoxy groups having 1 to 5 carbon atoms, and amino groups described by formula -Q-(NHCH2CH2)aNHR1 where R1 is as previously described and a is an interger from 0 to 5, 1 is in an integer equal to or greater than 1, m is 0 or an integer equal to or greater than 1 with the proviso that when m is 0 then X at the ends of the molecular chain is an alkyl group or aralkyl group having 2 to 20 carbon atoms; n is 0 or an integer equal to or greater than 1 with the proviso that when n is 0 then X at the ends of the molecular chain is an amino group described by formula -Q-(NHCH2CH2)aNHR1 where R1, Q, and a are as previously described.
  7. The printing paper sizing agent composition of Claim 6, where the number of carbon atoms in R2 is in the range of 6 to 15.
  8. The printing paper sizing agent composition of Claim 6, where the number of carbon atoms in R2 is in the range of 8 to 14.
  9. The printing paper sizing agent composition of any of claims 6 to 8, where 1 is an integer in the range of 10 to 1000, m is an integer in the range of 2 to 200, and n is an integer in the range of 2 to 30.
  10. The printing paper sizing agent composition of any of claims 6 to 8, where 1 is an integer in the range of 50 to 500, m is an integer in the range of 5 to 100, and n is an integer in the range of 2 to 20.
  11. The printing paper sizing agent composition of any of claims 1 to 10, where the organopolysiloxane has a viscosity in the range of 10 to 10,000 mm2/s at 25°C.
  12. The printing paper sizing agent composition of any of claims 1 to 10, where the organopolysiloxane has a viscosity in the range of 50 to 10,000 mm2/s at 25°C.
  13. The printing paper sizing agent composition of any of claims 1 to 12, where component (B) is selected from the group consisting of starches, cellulose derivatives, polyvinyl alcohols, polyvinyl methyl ethers, polyacrylic acid esters, latexes, and urethane emulsions.
  14. The printing paper sizing agent composition of any of claims 1 to 12, where component (B) is selected from the group consisting of carboxymethylcellulose, methylcellulose, and polyvinyl alcohols.
  15. The printing paper sizing agent composition of any of claims 1 to 14 comprising 3 to 40 wt% component (A), 3 to 10 wt% component (B), and 50 to 94 wt% water.
EP00308618A 1999-09-29 2000-09-29 Printing paper sizing agent composition Withdrawn EP1088939A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP27553099A JP2001098156A (en) 1999-09-29 1999-09-29 Sizing agent composition for printing paper
JP27553099 1999-09-29

Publications (1)

Publication Number Publication Date
EP1088939A1 true EP1088939A1 (en) 2001-04-04

Family

ID=17556742

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00308618A Withdrawn EP1088939A1 (en) 1999-09-29 2000-09-29 Printing paper sizing agent composition

Country Status (2)

Country Link
EP (1) EP1088939A1 (en)
JP (1) JP2001098156A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009000978A1 (en) 2009-02-18 2010-08-19 Wacker Chemie Ag Aqueous compositions containing amino functional organopolysiloxanes and starch
US7964062B2 (en) 2004-10-22 2011-06-21 Shin-Etsu Chemical Co., Ltd. Paper treating agent comprising a silicone composition

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4829513B2 (en) * 2005-03-15 2011-12-07 信越化学工業株式会社 Water / oil repellent composition and paper treating agent containing the composition

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB643458A (en) * 1941-11-01 1950-09-20 Frank Joseph Sowa Process for waterproofing materials and the waterproofed materials so produced
GB786452A (en) * 1954-09-10 1957-11-20 Midland Silicones Ltd Improvements in or relating to organosilicon compounds
GB789950A (en) * 1955-08-17 1958-01-29 Midland Silicones Ltd Improvements in or relating to organo-silicon compounds
GB1035876A (en) * 1963-08-16 1966-07-13 Bayer Ag Paper sizing
US3755070A (en) * 1969-08-05 1973-08-28 Dow Corning Paper sized with carboxy-functional silicones
EP0930395A1 (en) * 1998-01-20 1999-07-21 Dow Europe S.A. Low foaming paper surface sizing composition

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB643458A (en) * 1941-11-01 1950-09-20 Frank Joseph Sowa Process for waterproofing materials and the waterproofed materials so produced
GB786452A (en) * 1954-09-10 1957-11-20 Midland Silicones Ltd Improvements in or relating to organosilicon compounds
GB789950A (en) * 1955-08-17 1958-01-29 Midland Silicones Ltd Improvements in or relating to organo-silicon compounds
GB1035876A (en) * 1963-08-16 1966-07-13 Bayer Ag Paper sizing
US3755070A (en) * 1969-08-05 1973-08-28 Dow Corning Paper sized with carboxy-functional silicones
EP0930395A1 (en) * 1998-01-20 1999-07-21 Dow Europe S.A. Low foaming paper surface sizing composition

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7964062B2 (en) 2004-10-22 2011-06-21 Shin-Etsu Chemical Co., Ltd. Paper treating agent comprising a silicone composition
DE102009000978A1 (en) 2009-02-18 2010-08-19 Wacker Chemie Ag Aqueous compositions containing amino functional organopolysiloxanes and starch
WO2010094638A1 (en) 2009-02-18 2010-08-26 Wacker Chemie Ag Aqueous compositions containing amino-functional organopolysiloxanes and starch

Also Published As

Publication number Publication date
JP2001098156A (en) 2001-04-10

Similar Documents

Publication Publication Date Title
EP0775590B1 (en) Image recording paper containing silicone
US6482883B1 (en) Ink jet recording material demonstrating a balance of properties including improved imaging performance and good water resistance
KR20180074734A (en) Water insoluble alpha - (1,3 - glucan) composition
WO2013126869A1 (en) Polyurethane-based primer for enhancing adhesion of liquid toner
BRPI0619648B1 (en) COMPOSITION APPLIED IN COLLAGE PRESS AND PAPER SUBSTRATE
AU598378B2 (en) Method of printing on plastic substrate using a water-based ink
US7758934B2 (en) Dual mode ink jet paper
US4942410A (en) Toner receptive coating
WO2010071797A1 (en) Inkjet printing paper
US11767447B2 (en) Topcoat composition of imaging blanket with improved properties
US20170267009A1 (en) Print quality on thin coatings of cellulose nanocrystals
US4958173A (en) Toner receptive coating
US6398860B1 (en) Sizing agent composition for printing paper
EP1088939A1 (en) Printing paper sizing agent composition
NO173244B (en) ADHESIVE DRAWING MIXTURE AND PROCEDURE BY USING THIS
US5460856A (en) Processes utilizing mixed emulsions in the printing industry
CA3077847C (en) Aqueous ink compositions for inkjet printing on non-porous substrates
JP4724326B2 (en) Water-based printing paper surface coating agent, production method thereof, and printing paper coated with the same
JP2003080832A (en) Coating agent for ink jet recording sheet
US20040109710A1 (en) Fixing apparatus of electrophotographic printer
JP2004058395A (en) Recording paper sheet
JP4767490B2 (en) High speed rotary ink jet recording postcard paper
US5709738A (en) Coating composition for ink jet printing
FI98637B (en) Adhesive releasing composition
CA2094004A1 (en) Colloids to increase coefficient of friction in carbonless paper pad coatings

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 20010815

AKX Designation fees paid

Free format text: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 20020913