WO2016002653A1 - 充填材用組成物、充填材および充填材の製造方法 - Google Patents
充填材用組成物、充填材および充填材の製造方法 Download PDFInfo
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- WO2016002653A1 WO2016002653A1 PCT/JP2015/068517 JP2015068517W WO2016002653A1 WO 2016002653 A1 WO2016002653 A1 WO 2016002653A1 JP 2015068517 W JP2015068517 W JP 2015068517W WO 2016002653 A1 WO2016002653 A1 WO 2016002653A1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/28—Compounds of silicon
- C09C1/30—Silicic acid
- C09C1/309—Combinations of treatments provided for in groups C09C1/3009 - C09C1/3081
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
- C01B33/18—Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/17—Amines; Quaternary ammonium compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
- C08K5/548—Silicon-containing compounds containing sulfur
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L71/00—Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
- C08L71/02—Polyalkylene oxides
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/28—Compounds of silicon
- C09C1/30—Silicic acid
- C09C1/3009—Physical treatment, e.g. grinding; treatment with ultrasonic vibrations
- C09C1/3027—Drying, calcination
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/28—Compounds of silicon
- C09C1/30—Silicic acid
- C09C1/3072—Treatment with macro-molecular organic compounds
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/28—Compounds of silicon
- C09C1/30—Silicic acid
- C09C1/3081—Treatment with organo-silicon compounds
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/006—Combinations of treatments provided for in groups C09C3/04 - C09C3/12
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- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/04—Physical treatment, e.g. grinding, treatment with ultrasonic vibrations
- C09C3/043—Drying, calcination
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/08—Treatment with low-molecular-weight non-polymer organic compounds
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/10—Treatment with macromolecular organic compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/12—Treatment with organosilicon compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/28—Compounds of silicon
- C09C1/30—Silicic acid
- C09C1/3063—Treatment with low-molecular organic compounds
Definitions
- the present invention relates to a filler composition, a filler, and a method for producing the filler, and particularly includes a filler composition having a specific composition, a filler, and a method for producing the filler.
- a so-called integral blend method is employed in which silica and a silane coupling agent are blended in rubber, and the silica and the silane coupling agent are reacted during the rubber kneading operation.
- alcohol is produced when the silane coupling agent reacts with silica. Since this alcohol is released into the atmosphere, there is a problem that the working environment is deteriorated and VOC (Volatile Organic Compound) increases.
- VOC Volatile Organic Compound
- Patent Document 1 a technique for converting an alkoxy group of a silane coupling agent into a long chain alcohol (see Patent Document 1), (ii) a technique for producing chemically modified silica (see Patent Document 2), and (iii) A technique of applying a treatment liquid composed of a sulfur-containing silane coupling agent, water, alcohol, and a basic substance to silica and performing surface treatment on the silica (see Patent Document 3) has been proposed.
- Japanese Patent Publication Japanese Patent Laid-Open No. 2005-35889 (published on February 10, 2005)” Japanese Patent Gazette “Special Table 2003-53215 (published on October 21, 2003)” Japanese Patent Publication “Japanese Patent Laid-Open No. 2011-63690 (published March 31, 2011)”
- Patent Document 1 it is possible to achieve suppression of VOC by changing the generated alcohol to alcohol having a high boiling point, but improvement of productivity cannot be expected.
- the silane coupling agent does not penetrate into the inside of the silica particle aggregate, and only the surface of the silica particle aggregate is treated with the silane coupling agent. There is a problem that it is difficult to uniformly treat the whole with a silane coupling agent.
- the present invention has been made in view of the above-described problems, and its purpose is for a filler for producing a high-performance filler with high productivity while suppressing deterioration of the working environment and VOC. It is providing the composition, the filler, and the manufacturing method of a filler.
- the inventors of the present invention efficiently treated wet silica and sulfur by surface-treating wet silica with a sulfur-containing silane coupling agent in the presence of a polyoxyethylene unsaturated fatty acid ester. It can be made to react with the containing silane coupling agent (in other words, the amount of unreacted sulfur-containing silane coupling agent can be reduced), and as a result, it has been found that the above problems can be solved, and the present invention It came to complete.
- the filler composition of the present invention is characterized by containing wet silica, a polyoxyethylene unsaturated fatty acid ester, and a sulfur-containing silane coupling agent in order to solve the above problems.
- the wet silica is preferably a wet silica slurry.
- the sulfur-containing silane coupling agent includes a sulfur-containing silane coupling agent represented by the following formula [I] and a sulfur-containing silane coupling agent represented by the following formula [II]. It is preferably at least one selected from the group consisting of That means
- R 1 is independently a monovalent hydrocarbon group having 1 to 18 carbon atoms
- R 2 is a divalent hydrocarbon group having 1 to 9 carbon atoms
- x is 2 to 6
- Y is 0, It is an integer of 1 or 2.
- the filler composition of the present invention preferably contains 1 to 20 parts by weight of the sulfur-containing silane coupling agent with respect to 100 parts by weight of the wet silica.
- the polyoxyethylene unsaturated fatty acid ester preferably has an HLB value of 5 to 10.
- the filler composition of the present invention preferably contains 0.001 to 5 parts by weight of the polyoxyethylene unsaturated fatty acid ester with respect to 100 parts by weight of the wet silica.
- the wet silica preferably has a BET specific surface area of 50 to 300 m 2 / g.
- the filler composition of the present invention preferably further contains at least one selected from the group consisting of basic substances and acidic substances.
- the basic substance is selected from the group consisting of monoalkylamines, dialkylamines and trialkylamines having an alkyl group having 1 to 24 carbon atoms which may contain a hydroxyl group. It is preferable that at least one selected.
- the acidic substance is preferably at least one selected from the group consisting of (poly) carboxylic acids and hydroxy acids having 1 to 18 carbon atoms.
- the production method of the present invention is a method for producing the composition for a filler of the present invention, wherein the wet silica, the polyoxyethylene unsaturated fatty acid ester and the sulfur-containing silane coupling agent are used. It is characterized by mixing at 10 ° C. to 120 ° C. for 10 minutes to 24 hours.
- the mixing is preferably performed under the condition of pH 4-10.
- the filler of the present invention is characterized by being obtained from the composition for filler of the present invention in order to solve the above problems.
- the filler of the present invention is a filler containing wet silica, a polyoxyethylene unsaturated fatty acid ester, and a sulfur-containing silane coupling agent. 1 to 20 parts by weight of a sulfur-containing silane coupling agent is contained, and 0.001 to 5 parts by weight of the polyoxyethylene unsaturated fatty acid ester is contained with respect to 100 parts by weight of the wet silica.
- the amount of the sulfur-containing silane coupling agent extracted when the filler is subjected to solvent extraction is preferably 2% by weight or less of the filler.
- the method for producing a filler according to the present invention is characterized by including a drying step of drying the composition for filler according to the present invention in order to solve the above problems.
- the drying step preferably includes a step of drying the filler composition by a spray drying method.
- the filler production method of the present invention preferably includes a heating step of heating the dried product obtained in the drying step at 80 ° C. to 200 ° C. for 10 minutes to 24 hours.
- the filler composition of the present invention is not particularly limited as long as it contains wet silica, a polyoxyethylene unsaturated fatty acid ester, and a sulfur-containing silane coupling agent, and other specific configurations and uses.
- the filler obtained from the above-mentioned filler composition can be used for various applications, and the application is not particularly limited.
- the filler is added to a composition such as rubber, resin, paint or sealing material. Can be done.
- wet silica and a sulfur-containing silane coupling agent can be reacted efficiently in the presence of a polyoxyethylene unsaturated fatty acid ester.
- a sulfur-containing silane coupling agent can be uniformly bonded to the silica surface.
- wet silica contained in the filler composition reacts with the sulfur-containing silane coupling agent. Due to the presence of the ethylenically unsaturated fatty acid ester, the sulfur-containing silane coupling agent enters not only the surface of the aggregate of silica particles but also the interior of the aggregate, and the silica and the sulfur-containing silane coupling agent are bonded. That is, the polyoxyethylene unsaturated fatty acid ester functions as an emulsifier for more uniformly dispersing the wet silica and the sulfur-containing silane coupling agent in the filler composition.
- Agglomerates of silica particles in which a large amount of a sulfur-containing silane coupling agent is bonded in a large amount have an excellent function as a filler. For example, if the aggregate of silica particles and rubber are mixed together, a tire with improved fuel efficiency and wear resistance can be realized.
- the filler obtained from the above-mentioned filler composition can be used by kneading with various compositions (for example, rubber composition etc.), but this filler is prepared in advance with wet silica and sulfur-containing silane coupling agent. Are uniformly reacted, so that generation of alcohol during kneading can be prevented or reduced. Thereby, there exists an effect that improvement of a work environment and suppression of VOC are realizable.
- this filler when this filler is used, it is not necessary to react wet silica with a sulfur-containing silane coupling agent during kneading, so that shortening of kneading time and multistage kneading can be omitted. Thereby, since the manufacturing process of the product (for example, tire etc.) using this filler can be simplified, the productivity of a product can be improved.
- wet silica As the wet silica that can be used in the composition for filler, known wet silica can be suitably used, and the specific configuration thereof is not particularly limited. For example, wet silica produced by a wet method (precipitation method, gel method, etc.) can be suitably used.
- wet silica prepared by wet method has many active hydroxyl groups (silanol) on the surface, and it is possible to react many of the hydroxyl groups and silane coupling agents. And has a feature of low cost. Therefore, if wet silica is used as a component of the present filler composition, the product modification effect by the silane coupling agent is higher and the wet silica is less expensive than when dry silica is used. There is an advantage that the cost of the product can be reduced.
- the BET specific surface area of the wet silica is not particularly limited, but is preferably 50 to 300 m 2 / g, more preferably 80 to 200 m 2 / g, and more preferably 100 to 180 m 2 / g. 120 to 165 m 2 / g is particularly preferable.
- the performance of the filler produced from the present filler composition can be improved.
- a filler prepared from the present filler composition and a rubber composition are mixed, an increase in the viscosity of the rubber can be suppressed, and the filler and the rubber can be more uniformly kneaded.
- the abrasion resistance of rubber can be improved.
- the BET specific surface area can be measured using a Tristar II 3020 measuring apparatus manufactured by Shimadzu Corporation according to the protocol attached to the apparatus.
- wet silica is not particularly limited, but is preferably, for example, a wet silica slurry.
- wet silica slurry means a state in which wet silica is dispersed in a solvent.
- this filler composition may be one in which wet silica, polyoxyethylene unsaturated fatty acid ester, and sulfur-containing silane coupling agent are dispersed in the above-described solvent.
- wet silica and a sulfur containing silane coupling agent can be disperse
- the solvent for dispersing the wet silica is not particularly limited, and examples thereof include water, ketones such as acetone, alcohols such as ethanol, and ethers such as THF. Of these solvents, water is preferred. If water is used as the solvent, it is possible to more easily and uniformly disperse the wet silica and the sulfur-containing silane coupling agent in the solvent by using a polyoxyethylene unsaturated fatty acid ester described later, It is also preferable because the reaction between the wet silica and the sulfur-containing silane coupling agent can be promoted.
- the wet silica slurry may be a semi-finished wet silica slurry obtained when producing wet silica, or after producing the product wet silica, the wet silica is dispersed in a solvent. The resulting wet silica slurry may be used.
- the concentration of solid content (wet silica) in the wet silica slurry is not particularly limited, but 5 to 50% by weight of the wet silica slurry is preferably solid content, and 5 to 40% by weight is solid content.
- the solid content is more preferably 5 to 35% by weight, the solid content is more preferably 8 to 30% by weight, and the solid content is particularly preferably 10 to 17% by weight. If the concentration of the solid content (wet silica) in the wet silica slurry is within the above range, the wet silica and the sulfur-containing silane coupling agent can be more uniformly dispersed in the composition for the filler, and for the filler. Wet silica and sulfur-containing silane coupling agents can be more easily mixed in the composition.
- the polyoxyethylene unsaturated fatty acid ester that can be used in the present invention is not particularly limited, and known ones and commercially available products can be used.
- a product obtained by addition polymerization of an unsaturated fatty acid with ethylene oxide according to a known method can be used.
- the polyoxyethylene unsaturated fatty acid ester is preferably obtained by addition polymerization of ethylene oxide to unsaturated fatty acid having 12 to 26 carbon atoms, and addition polymerization of ethylene oxide to unsaturated fatty acid having 14 to 24 carbon atoms. More preferably, it is obtained by addition polymerization of ethylene oxide to an unsaturated fatty acid having 16 to 20 carbon atoms, and ethylene oxide is added to an unsaturated fatty acid having 18 carbon atoms. It is particularly preferred that it is obtained by addition polymerization. If it is the said structure, wet silica and a sulfur containing silane coupling agent can be made to react more efficiently.
- the number of unsaturated bonds contained in the unsaturated fatty acid is not particularly limited, and may be one, two, three, or four. The number may be 5 or more.
- the type of unsaturated bond contained in the unsaturated fatty acid is not particularly limited, and may be a double bond or a triple bond. From the viewpoint of reacting wet silica with a sulfur-containing silane coupling agent more efficiently, and from the viewpoint of producing a filler at low cost, it can be said that a double bond is more preferable.
- the polyoxyethylene unsaturated fatty acid ester is obtained by addition polymerization of ethylene oxide to palmitoleic acid, oleic acid, vaccenic acid, linoleic acid, linolenic acid, eleostearic acid, arachidonic acid, or nervonic acid. It may be obtained.
- polyoxyethylene unsaturated fatty acid ester may be obtained by addition polymerization of ethylene oxide to a mixture containing a plurality of types of fatty acids as described above.
- the HLB (hydrophile lipophile balance) value of the polyoxyethylene unsaturated fatty acid ester is not particularly limited, but is preferably 5 to 10, more preferably 6 to 10, and particularly preferably 7 to 9. preferable.
- the HLB value is an HLB value calculated based on the Griffin equation.
- the amount of the polyoxyethylene unsaturated fatty acid ester contained in the filler composition is not particularly limited.
- the amount is preferably 0.001 to 5 parts by weight with respect to 100 parts by weight of wet silica.
- 0.001 to 4 parts by weight is more preferable, 0.001 to 3 parts by weight is more preferable, 0.002 to 2.5 parts by weight is more preferable, and 0.005 to 2 parts by weight is preferable. More preferred is 0.01 to 1.8 parts by weight.
- wet silica and sulfur-containing silane coupling agent can be more uniformly dispersed in the present filler composition.
- the amount of polyoxyethylene unsaturated fatty acid ester remaining in the filler produced from the filler composition can be reduced.
- various effects of the remaining polyoxyethylene unsaturated fatty acid ester on the filler or a product (for example, rubber product) containing the filler can be minimized.
- the amount of polyoxyethylene unsaturated fatty acid ester to be used can be reduced, and a high-performance filler can be produced at low cost.
- sulfur-containing silane coupling agent The specific structure of the sulfur-containing silane coupling agent that can be used in the present invention is not particularly limited, and a known sulfur-containing silane coupling agent can be used. For example, it is preferably at least one selected from the group consisting of a sulfur-containing silane coupling agent represented by the following formula [I] and a sulfur-containing silane coupling agent represented by the following formula [II]. That means;
- R 1 is independently a monovalent hydrocarbon group having 1 to 18 carbon atoms
- R 2 is a divalent hydrocarbon group having 1 to 9 carbon atoms
- x is 2 to 6
- Y is 0, It is an integer of 1 or 2.
- R 3 is each independently a monovalent hydrocarbon group having 1 to 18 carbon atoms
- R 4 is a divalent hydrocarbon group having 1 to 9 carbon atoms
- Y is an integer of 0, 1, or 2 .
- R 1 and R 3 preferably have 1 to 12 carbon atoms, more preferably 1 to 8 carbon atoms, and particularly preferably 1 to 4 carbon atoms. If it is the said structure, wet silica and a sulfur containing silane coupling agent can be made to react more efficiently.
- X is more preferably 2-6, and particularly preferably 2-4. The reason is that the structure can suppress the scorch property of the rubber while ensuring the reactivity between the sulfur-containing silane coupling agent and the rubber.
- Y is particularly preferably 0 or 1. The reason is that, with this configuration, the sulfur-containing silane coupling agent has a plurality of reaction points with silanol, so that it can react with more silanol.
- sulfur-containing silane coupling agents include bis (triethoxysilylpropyl) disulfide, bis (triethoxysilylpropyl) tetrasulfide, bis (triethoxysilylpropyl) polysulfide, bis (trimethoxysilylpropyl) disulfide Bis (trimethoxysilylpropyl) tetrasulfide, bis (diethoxymethylsilylpropyl) disulfide, bis (diethoxymethylsilylpropyl) tetrasulfide, 3-mercaptopropyltrimethoxysilane, 3-mercaptopropyltriethoxysilane, 3- Examples include mercaptopropylmethyldimethoxysilane and 3-mercaptopropylmethyldiethoxysilane, but the present invention is not limited thereto.
- the amount of the sulfur-containing silane coupling agent contained in the filler composition is not particularly limited, but is preferably 1 to 20 parts by weight with respect to 100 parts by weight of wet silica, and 1 to 18 parts by weight. More preferably, it is 2 to 18 parts by weight, more preferably 3 to 15 parts by weight, and particularly preferably 4 to 15 parts by weight. If it is the said structure, many sulfur containing silane coupling agents can be combined efficiently with respect to the wet silica per unit weight. Moreover, a high-performance filler can be realized. For example, when the filler and rubber are mixed, the scorch and viscoelastic properties of the rubber can be improved.
- composition for fillers may contain other components in addition to the above-described wet silica, polyoxyethylene unsaturated fatty acid ester, and sulfur-containing silane coupling agent.
- At least one selected from the group consisting of basic substances and acidic substances may be contained.
- the specific configuration of the basic substance is not particularly limited, and includes at least one selected from the group consisting of monoalkylamines, dialkylamines, and trialkylamines having an alkyl group having 1 to 24 carbon atoms. be able to.
- a hydroxyl group may be bonded to the alkyl group, or a hydroxyl group may not be bonded.
- bonded with the alkyl group is not specifically limited, One may be sufficient and plural may be sufficient.
- the specific constitution of the basic substance is a monoalkylamine, dialkylamine and trialkylamine having an alkyl group having 2 to 24 carbon atoms. It is preferably at least one selected from the group consisting of, and particularly preferably at least one selected from the group consisting of dialkylamines and trialkylamines having an alkyl group having 4 to 24 carbon atoms. . Furthermore, it is more preferable that a hydroxyl group is bonded to the alkyl group (in other words, the basic substance is more preferably an amine having a hydroxyl group).
- Examples of such basic substances are methylamine, ethylamine, butylamine, octylamine, dimethylamine, diethylamine, dibutylamine, dioctylamine, trimethylamine, triethylamine, tributylamine, trioctylamine, ethanolamine, diethanolamine, triethanol.
- Examples include amine, methylethanolamine, ethylethanolamine, butylethanolamine, dimethylethanolamine, diethylethanolamine, dibutylethanolamine, methyldiethanolamine, ethyldiethanolamine, butyldiethanolamine, and aminoethylethanolamine. It is not limited to these.
- the specific configuration of the acidic substance is not particularly limited, and can include at least one selected from the group consisting of (poly) carboxylic acids and hydroxy acids having 1 to 18 carbon atoms.
- the specific structure of the acidic substance is at least selected from the group consisting of (poly) carboxylic acids and hydroxy acids having 1 to 12 carbon atoms. It is preferably one, more preferably at least one selected from the group consisting of (poly) carboxylic acids and hydroxy acids having 2 to 12 carbon atoms, and having 3 to 8 carbon atoms ( Particularly preferred is at least one selected from the group consisting of poly) carboxylic acids and hydroxy acids.
- the acidic substance may contain a double bond between carbons in the molecule. It is preferable if the acidic substance contains a double bond in the molecule because the acidic substance can be involved in the vulcanization reaction, thereby suppressing bloom, bleed and the like.
- Such acidic substances include acetic acid, butyric acid, myristic acid, stearic acid, malic acid, citric acid, succinic acid, tartaric acid, lactic acid, fumaric acid and maleic acid. It is not limited to.
- the amount of each of the basic substance and the acidic substance contained in the composition for filler is not particularly limited, but is preferably 0.1 to 5 parts by weight with respect to 100 parts by weight of wet silica. More preferably, it is 1 to 3 parts by weight, more preferably 0.3 to 2 parts by weight, and particularly preferably 0.5 to 2 parts by weight. If it is the said structure, the effect derived from the basic substance mentioned above and the effect derived from the acidic substance mentioned above can be made higher.
- the present filler composition may further contain other components in addition to the components described above as long as the effects of the present invention are not impaired.
- fillers such as carbon black and calcium carbonate, processing oil, wax, anti-aging agent, anti-scorch agent, tackifier, stearic acid, polyoxyethylene saturated fatty acid ester, zinc white, processing aid, vulcanization accelerator And a vulcanizing agent and the like.
- the amount of the other component contained in the present filler composition is not particularly limited, but may be 1 to 30 parts by weight or 1 to 15 parts by weight with respect to 100 parts by weight of wet silica. There may be.
- composition for fillers concerning this invention is a method by which wet silica (for example, wet silica slurry), polyoxyethylene unsaturated fatty acid ester, and a sulfur containing silane coupling agent are fully disperse
- distributed especially There is no limit.
- wet silica for example, wet silica slurry
- polyoxyethylene unsaturated fatty acid ester and sulfur-containing silane coupling agent other components described above are sufficiently dispersed if necessary. It may be a method.
- the mixing temperature condition is not particularly limited, but is preferably 0 to 120 ° C, more preferably 10 ° C to 120 ° C, and more preferably 20 ° C to 105 ° C.
- the temperature is preferably 20 ° C to 95 ° C. If it is the said mixing temperature, it can prevent that the component in the composition for fillers and a filler thermally decompose. As a result, the composition of the filler of the present embodiment can be made to reflect the composition of the filler composition.
- the mixing time is not particularly limited, but is preferably 5 minutes to 24 hours, more preferably 10 minutes to 24 hours, and more preferably 30 minutes to 4 hours. It is particularly preferably 1 to 24 hours.
- the pH is more preferably 4 to 9, and particularly preferably 4 to 7. If the above pH is 4 to 10, the amount of acid or base used to adjust the pH can be reduced in the production of the filler. Furthermore, it can prevent that a sulfur containing silane coupling agent adheres to the wall surface etc. of a container, when mixing.
- the filler according to the present invention is not particularly limited as long as it is obtained from the filler composition described above.
- the present filler is a filler containing wet silica, polyoxyethylene unsaturated fatty acid ester and sulfur-containing silane coupling agent, and 1 to 20 weight percent of the sulfur-containing silane coupling agent with respect to 100 parts by weight of wet silica.
- the filler may contain 0.001 to 5 parts by weight of a polyoxyethylene unsaturated fatty acid ester with respect to 100 parts by weight of wet silica.
- the filler is a filler formed of wet silica, polyoxyethylene unsaturated fatty acid ester, and a sulfur-containing silane coupling agent, and the sulfur-containing silane with respect to 100 parts by weight of the wet silica.
- 1 to 20 parts by weight of a coupling agent is bonded, and the filler contains 0.001 to 5 parts by weight of the polyoxyethylene unsaturated fatty acid ester with respect to 100 parts by weight of the wet silica.
- This filler may contain 1 to 18 parts by weight, or 2 to 18 parts by weight of a sulfur-containing silane coupling agent with respect to 100 parts by weight of wet silica. It may be contained in an amount of ⁇ 15 parts by weight, or may be contained in an amount of 4-15 parts by weight.
- the filler may contain 0.001 to 5 parts by weight, or 0.001 to 4 parts by weight of polyoxyethylene unsaturated fatty acid ester with respect to 100 parts by weight of wet silica. Or 0.001 to 3 parts by weight, 0.002 to 2.5 parts by weight, or 0.005 to 2 parts by weight It may be 0.01 to 1.8 parts by weight.
- the reaction efficiency between the wet silica and the sulfur-containing silane coupling agent can be known from the amount of the extracted sulfur-containing silane coupling agent. That is, it can be determined that the smaller the amount of the extracted sulfur-containing silane coupling agent, the higher the reaction efficiency between the wet silica and the sulfur-containing silane coupling agent, which is a preferable filler.
- the filler composition described above can efficiently react wet silica with a sulfur-containing silane coupling agent. Therefore, in this filler, the amount of the sulfur-containing silane coupling agent extracted is small.
- the extraction amount of the sulfur-containing silane coupling agent when the present filler is subjected to solvent extraction is preferably 2% by weight or less of the filler, and more preferably 1% by weight or less of the filler. preferable. Furthermore, 0.9 wt% or less of the filler, 0.8 wt% or less of the filler, 0.7 wt% or less of the filler, 0.6 wt% or less of the filler, and 0.5 wt% of the filler. %, 0.4% by weight or less of the filler, 0.3% by weight or less of the filler, 0.2% by weight or less of the filler, and 0.1% by weight or less of the filler.
- a solvent that can dissolve the sulfur-containing silane coupling agent and does not react with the sulfur-containing silane coupling agent can be used.
- solvents include hydrocarbons such as hexane and heptane, ketones such as acetone and methyl ethyl ketone, esters such as ethyl acetate, and chloroform, but the present invention is not limited thereto. is not.
- methyl ethyl ketone containing the filler is filtered under reduced pressure to obtain a filtrate from which the filler has been removed. Further, the filtration residue containing the filler is rinsed 5 times with 5 mL of methyl ethyl ketone, and the methyl ethyl ketone used for the rinse is recovered.
- the mixture was concentrated under reduced pressure at 70 ° C. under reduced pressure of 20 mmHg. And the weight of the extract (in other words, unreacted sulfur-containing silane coupling agent) collected after concentration under reduced pressure is measured.
- the extraction amount is obtained as a ratio of the weight of the extract to 10.0 g of the filler.
- the manufacturing method of the filler which concerns on this invention is a method for producing the filler mentioned above using the composition for filler mentioned above.
- the method for producing the filler includes a drying step, and may further include a heating step if necessary. Below, each process is demonstrated.
- the drying process may be a process in which the composition for filler is reacted at a high temperature for a predetermined time, and other configurations are not limited.
- wet silica and the sulfur-containing silane coupling agent react with each other, and the sulfur-containing silane coupling agent binds uniformly and in large amounts not only on the surface of the silica particle aggregate but also inside. . Therefore, the drying process may be considered as a reaction process.
- drying methods used in the drying step are not particularly limited, and examples include shelf drying, drum dryers, rotary kilns, vacuum heat dryers, and spray dryers (spray drying methods).
- a spray dryer spray drying method
- a spray dryer it is preferable. The reason is that if it is a spray dryer (spray drying method), it is possible to coat the silica surface with a silane coupling agent while suppressing aggregation of silica.
- the spraying method is not particularly limited, and may be a nozzle method or a centrifugal spraying method.
- the drying temperature (for example, the temperature of hot air for drying) is not particularly limited, but is preferably 60 ° C. to 1000 ° C., and more preferably 100 ° C. to 800 ° C.
- the drying temperature may be 200 ° C to 900 ° C.
- the temperature of the filler immediately after drying can be adjusted to 80 to 200 ° C. If it is the drying temperature mentioned above, a filler can fully be dried and the component in a composition for fillers and a filler can be prevented from thermally decomposing.
- the drying time is not particularly limited, but the drying time is preferably 1 second to 24 hours, and more preferably 1 second to 8 hours.
- the manufacturing method of the filler of this Embodiment may include the heating process which heats the dried product obtained at the drying process. Although it does not specifically limit as a specific heating method used for a heating process, Commercially available oven etc. can be mentioned.
- the heating temperature (for example, the temperature in the oven) and the heating time are not particularly limited, but the dried product obtained in the drying step is preferably heated at 80 ° C. to 200 ° C. for 10 minutes to 24 hours, Heating at 80 ° C. to 180 ° C. for 10 minutes to 12 hours is more preferable, heating at 100 ° C. to 160 ° C. for 30 minutes to 8 hours is more preferable, and heating at 150 ° C. for 6 hours is particularly preferable.
- the heating temperature and the heating time described above can not only sufficiently dry the filler. It is possible to prevent the components in the filler composition and the filler from being thermally decomposed.
- Example 1 Production of Filler 1> Polyoxyethylene oleate (trade name: H-3549A (Daiichi Kogyo Seiyaku Co., Ltd.)) was added to 2 kg of water-dispersed wet silica slurry containing 15 wt% of Tokusil 233 (manufactured by OSC, BET specific surface area 120 m 2 / g). , HLB value: 8) 0.9 g (0.3 parts by weight with respect to 100 parts by weight of wet silica) and 45 g (with respect to 100 parts by weight of wet silica) of sulfur-containing silane coupling agent (Daiso Co., Ltd. Cabras 2B) 15 parts by weight). Then, the mixed solution was stirred at room temperature (about 23 ° C.) for 24 hours. The pH of the mixed solution was 6.
- the above mixed solution was dried under a condition of a hot air temperature of 200 ° C. with a spray dryer manufactured by Nippon Büch to obtain a powder.
- the obtained powder was dried in an oven at 150 ° C. for 6 hours to obtain a filler 1.
- Example 2 Production of Filler 2> Polyoxyethylene oleate (trade name: H-3549A (Daiichi Kogyo Seiyaku Co., Ltd.)) was added to 2 kg of water-dispersed wet silica slurry containing 10% by weight of Tokusil 233 (manufactured by OSC, BET specific surface area 120 m 2 / g). , HLB value: 8) 0.4 g (0.2 parts by weight with respect to 100 parts by weight of wet silica) and 20 g of sulfur-containing silane coupling agent (Daiso Co., Ltd.
- Cabras 2B with respect to 100 parts by weight of wet silica, 10 parts by weight) and 3 g of 90% DL lactic acid (manufactured by Musashino Chemical Laboratory) were added. Then, the mixed solution was stirred at room temperature (about 23 ° C.) for 24 hours. The pH of the mixed solution was 4.
- the above mixed solution was dried under a condition of a hot air temperature of 200 ° C. with a spray dryer manufactured by Nippon Büch to obtain a powder.
- the obtained powder was dried in an oven at 150 ° C. for 6 hours to obtain a filler 2.
- Example 3 Production of Filler 3> Polyoxyethylene oleate (trade name: H-3549A (Daiichi Kogyo Seiyaku Co., Ltd.)) was added to 2 kg of water-dispersed wet silica slurry containing 10% by weight of Tokusil 233 (manufactured by OSC, BET specific surface area 120 m 2 / g). , HLB value: 8) 0.02 g (0.01 parts by weight with respect to 100 parts by weight of wet silica) and 8 g (with respect to 100 parts by weight of wet silica) of sulfur-containing silane coupling agent (Daiso Co., Ltd. Cabras 2B) 4 parts by weight). Then, the mixed solution was stirred at room temperature (about 23 ° C.) for 24 hours. The pH of the mixed solution was 6.
- the above mixed solution was dried under a condition of a hot air temperature of 200 ° C. with a spray dryer manufactured by Nippon Büch to obtain a powder.
- the obtained powder was dried in an oven at 150 ° C. for 6 hours to obtain a filler 3.
- Example 4 Production of Filler 4> Polyoxyethylene oleate (trade name: H-3549A (Daiichi Kogyo Seiyaku Co., Ltd.) was added to 2 kg of water-dispersed wet silica slurry containing 15% by weight of TokusilUSG-L (manufactured by OSC, BET specific surface area 150 m 2 / g). Manufactured), HLB value: 8) 0.9 g (0.3 parts by weight with respect to 100 parts by weight of wet silica) and 45 g (100 parts by weight of wet silica) of a sulfur-containing silane coupling agent (Cabulus 2B manufactured by Daiso Corporation). 15 parts by weight) was added. Then, the mixed solution was stirred at room temperature (about 23 ° C.) for 24 hours. The pH of the mixed solution was 7.
- the above mixed solution was dried under a condition of a hot air temperature of 200 ° C. with a spray dryer manufactured by Nippon Büch to obtain a powder.
- the obtained powder was dried in an oven at 150 ° C. for 6 hours to obtain a filler 4.
- Example 5 Production of filler 5> Polyoxyethylene oleate (trade name: H-3549A (Daiichi Kogyo Seiyaku Co., Ltd.)) was added to 2 kg of water-dispersed wet silica slurry containing 10% by weight of Tokusil 255EG (manufactured by OSC, BET specific surface area of 165 m 2 / g). , HLB value: 8) 0.4 g (0.2 parts by weight with respect to 100 parts by weight of wet silica) and 20 g of sulfur-containing silane coupling agent (Daiso Co., Ltd. Cabras 2B), with respect to 100 parts by weight of wet silica, 10 parts by weight). Then, the mixed solution was stirred at 60 ° C. for 4 hours. The pH of the mixed solution was 5.
- the above mixed solution was dried under a condition of a hot air temperature of 200 ° C. with a spray dryer manufactured by Nippon Büch to obtain a powder.
- the obtained powder was dried in an oven at 150 ° C. for 6 hours to obtain a filler 5.
- Example 6 Production of Filler 6> Polyoxyethylene oleate (trade name: H-3549A (Daiichi Kogyo Seiyaku Co., Ltd.)) was added to 8 kg of water-dispersed wet silica slurry containing 17% by weight of Tokusil 233 (manufactured by OSC, BET specific surface area 120 m 2 / g). HLB value: 8) 10 g (0.74 parts by weight with respect to 100 parts by weight of wet silica) and 200 g of sulfur-containing silane coupling agent (Cabulus 2B manufactured by Daiso Corporation) with respect to 100 parts by weight of wet silica. 7 parts by weight). Then, the mixed solution was stirred at 40 ° C. for 1 hour. The pH of the mixed solution was 6.
- the mixed solution was dried under a hot air temperature of 900 ° C. by a self-made spray dryer to obtain a powder, and the powder was used as the filler 6.
- Example 7 Production of Filler 7> Polyoxyethylene oleate (trade name: H-3549C (Daiichi Kogyo Seiyaku Co., Ltd.)) was added to 2 kg of water-dispersed wet silica slurry containing 15% by weight of Tokusil 233 (manufactured by OSC, BET specific surface area 120 m 2 / g). , HLB value: 7) 0.9 g (0.3 parts by weight with respect to 100 parts by weight of wet silica) and 45 g (with respect to 100 parts by weight of wet silica) of sulfur-containing silane coupling agent (Daiso Co., Ltd. Cabras 2B) 15 parts by weight). Then, the mixed solution was stirred at room temperature (about 23 ° C.) for 24 hours. The pH of the mixed solution was 6.
- the above mixed solution was dried under a condition of a hot air temperature of 200 ° C. with a spray dryer manufactured by Nippon Büch to obtain a powder.
- the obtained powder was dried in an oven at 150 ° C. for 6 hours to obtain a filler 7.
- Example 8 Production of filler 8> Polyoxyethylene oleate (trade name: H-3549B (Daiichi Kogyo Seiyaku Co., Ltd.)) was added to 2 kg of water-dispersed wet silica slurry containing 15 wt% of Tokusil 233 (manufactured by OSC, BET specific surface area 120 m 2 / g). , HLB value: 9) 0.9 g (0.3 parts by weight with respect to 100 parts by weight of wet silica) and 45 g (with respect to 100 parts by weight of wet silica) of sulfur-containing silane coupling agent (Daiso Co., Ltd. Cabras 2B) 15 parts by weight). Then, the mixed solution was stirred at room temperature (about 23 ° C.) for 24 hours. The pH of the mixed solution was 6.
- the above mixed solution was dried under a condition of a hot air temperature of 200 ° C. with a spray dryer manufactured by Nippon Büch to obtain a powder.
- the obtained powder was dried in an oven at 150 ° C. for 6 hours to obtain a filler 8.
- Example 9 Production of Filler 9> To 4 kg of water-dispersed wet silica slurry containing 15% by weight of TokusilUSG-L (manufactured by OSC, BET specific surface area of 150 m 2 / g), polyoxyethylene oleate (trade name: H-3549A (Daiichi Kogyo Seiyaku Co., Ltd.) Manufactured), HLB value: 8) 9 g (1.5 parts by weight with respect to 100 parts by weight of wet silica) and 90 g of sulfur-containing silane coupling agent (Cabulus 4 manufactured by Daiso Corporation) with respect to 100 parts by weight of wet silica, 15 parts by weight). Then, the mixed solution was stirred at 40 ° C. for 1 hour. The pH of the mixed solution was 7.
- the mixed solution was dried under a hot air temperature of 1000 ° C. by a self-made spray dryer to obtain a powder, and the powder was used as a filler 9.
- the filler contains an unreacted sulfur-containing silane coupling agent.
- Such a filler has good compatibility (for example, compatibility, dispersibility, kneadability, etc.) with various configurations (for example, rubber, resin, paint, sealing material, etc.), and is combined with various configurations.
- compatibility for example, compatibility, dispersibility, kneadability, etc.
- various configurations for example, rubber, resin, paint, sealing material, etc.
- the unreacted sulfur-containing silane coupling agent contained in the filler is extracted by an organic solvent, if the organic solvent used for the extraction is analyzed, the unreacted sulfur-containing silane coupling agent contained in the filler Can be measured.
- the solvent extraction test was performed on the above-described filler on the next day (about 16 hours later) after the filler was produced.
- the solvent extraction test was specifically performed according to the following procedure.
- methyl ethyl ketone containing the filler was filtered under reduced pressure to obtain a filtrate from which the filler was removed. Furthermore, the filtration residue containing the filler was rinsed 5 times with 5 mL of methyl ethyl ketone, and the methyl ethyl ketone used for the rinse was recovered.
- the mixture was concentrated under reduced pressure at 70 ° C. under reduced pressure of 20 mmHg using a rotary evaporator. And the weight of the extract (in other words, unreacted sulfur-containing silane coupling agent) collected after concentration under reduced pressure was measured.
- the fillers of the examples have a small amount of extraction, and wet silica and the sulfur-containing silane coupling agent react well (in other words, unreacted sulfur-containing silane). It became clear that there were few coupling agents. This has shown that the filler of an Example is suitable as a filler.
- the present invention can be widely used in the field of using fillers for modifying the properties of materials.
- the present invention can be used in the rubber industry field (for example, production of tires).
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Abstract
Description
本発明の充填材用組成物は、上記湿式シリカ100重量部に対し、上記硫黄含有シランカップリング剤1~20重量部を含有することが好ましい。
本発明の充填材用組成物は、湿式シリカ、ポリオキシエチレン不飽和脂肪酸エステルおよび硫黄含有シランカップリング剤を含有するものであればよく、その他の具体的な構成および用途については特に限定されない。
本充填材用組成物に使用し得る湿式シリカは、公知の湿式シリカを好適に利用でき、その具体的な構成等は特に限定されない。例えば、湿式法(沈降法、ゲル法など)によって作製された湿式シリカを好適に用いることができる。
本発明に使用し得るポリオキシエチレン不飽和脂肪酸エステルは、公知のものや市販品を利用でき、特に限定されない。例えば、周知の方法にしたがって、不飽和脂肪酸にエチレンオキシドを付加重合して得られたものを使用できる。
本発明に使用し得る硫黄含有シランカップリング剤の具体的な構造は、特に限定されず、公知の硫黄含有シランカップリング剤を用いることができる。例えば、下記式[I]で表される硫黄含有シランカップリング剤および下記式[II]で表される硫黄含有シランカップリング剤からなる群より選択される少なくとも1つであることが好ましい。つまり;
本充填材用組成物は、上述した湿式シリカ、ポリオキシエチレン不飽和脂肪酸エステルおよび硫黄含有シランカップリング剤の他に、他の成分を含んでいてもよい。
本発明に係る充填材用組成物の製造方法は、湿式シリカ(例えば、湿式シリカスラリー)、ポリオキシエチレン不飽和脂肪酸エステルおよび硫黄含有シランカップリング剤が十分に分散される方法であれば、特に限定されることはない。
本発明に係る充填材は、上述した充填材用組成物より得られるものであればよく、その他の具体的な構成等は特に限定されない。
本発明に係る充填材の製造方法は、上述した充填材用組成物を用いて、上述した充填材を作製するための方法である。本充填材の製造方法は、乾燥工程を含み、必要であれば更に加熱工程を含んでもよい。以下に、各工程について説明する。
乾燥工程は、上記充填材用組成物を、高温にて、所定の時間反応させる工程であればよく、その他の構成は限定されない。当該乾燥工程において、湿式シリカと硫黄含有シランカップリング剤とが反応して、シリカ粒子の凝集体の表面のみならず内部にまでも、均一、かつ、大量に硫黄含有シランカップリング剤が結合する。従って、乾燥工程は反応工程として考えてもよい。
本実施の形態の充填材の製造方法は、乾燥工程にて得られた乾燥産物を加熱する加熱工程を含んでいてもよい。加熱工程に用いる具体的な加熱方法としては、特に限定されないが、市販のオーブンなどを挙げることができる。
Tokusil233(OSC製、BET比表面積120m2/g)を15重量%含む水分散された湿式シリカスラリー2kgに、ポリオキシエチレンオレイン酸エステル(商品名:H-3549A(第一工業製薬株式会社製)、HLB値:8)0.9g(湿式シリカ100重量部に対し、0.3重量部)と、硫黄含有シランカップリング剤(ダイソー株式会社製カブラス2B)45g(湿式シリカ100重量部に対し、15重量部)と、を添加した。そして、当該混合溶液を、室温(約23℃)にて24時間撹拌した。なお、当該混合溶液のpHは6であった。
Tokusil233(OSC製、BET比表面積120m2/g)を10重量%含む水分散された湿式シリカスラリー2kgに、ポリオキシエチレンオレイン酸エステル(商品名:H-3549A(第一工業製薬株式会社製)、HLB値:8)0.4g(湿式シリカ100重量部に対し、0.2重量部)と、硫黄含有シランカップリング剤(ダイソー株式会社製カブラス2B)20g(湿式シリカ100重量部に対し、10重量部)と、3gの90%DL乳酸(株式会社武蔵野化学研究所製)と、を添加した。そして、当該混合溶液を、室温(約23℃)にて24時間撹拌した。なお、当該混合溶液のpHは4であった。
Tokusil233(OSC製、BET比表面積120m2/g)を10重量%含む水分散された湿式シリカスラリー2kgに、ポリオキシエチレンオレイン酸エステル(商品名:H-3549A(第一工業製薬株式会社製)、HLB値:8)0.02g(湿式シリカ100重量部に対し、0.01重量部)と、硫黄含有シランカップリング剤(ダイソー株式会社製カブラス2B)8g(湿式シリカ100重量部に対し、4重量部)と、を添加した。そして、当該混合溶液を、室温(約23℃)にて24時間撹拌した。なお、当該混合溶液のpHは6であった。
TokusilUSG-L(OSC製、BET比表面積150m2/g)を15重量%含む水分散された湿式シリカスラリー2kgに、ポリオキシエチレンオレイン酸エステル(商品名:H-3549A(第一工業製薬株式会社製)、HLB値:8)0.9g(湿式シリカ100重量部に対し、0.3重量部)と、硫黄含有シランカップリング剤(ダイソー株式会社製カブラス2B)45g(湿式シリカ100重量部に対し、15重量部)と、を添加した。そして、当該混合溶液を、室温(約23℃)にて24時間撹拌した。なお、当該混合溶液のpHは7であった。
Tokusil255EG(OSC製、BET比表面積165m2/g)を10重量%含む水分散された湿式シリカスラリー2kgに、ポリオキシエチレンオレイン酸エステル(商品名:H-3549A(第一工業製薬株式会社製)、HLB値:8)0.4g(湿式シリカ100重量部に対し、0.2重量部)と、硫黄含有シランカップリング剤(ダイソー株式会社製カブラス2B)20g(湿式シリカ100重量部に対し、10重量部)と、を添加した。そして、当該混合溶液を、60℃にて4時間撹拌した。なお、当該混合溶液のpHは5であった。
Tokusil233(OSC製、BET比表面積120m2/g)を17重量%含む水分散された湿式シリカスラリー8kgに、ポリオキシエチレンオレイン酸エステル(商品名:H-3549A(第一工業製薬株式会社製)、HLB値:8)10g(湿式シリカ100重量部に対し、0.74重量部)と、硫黄含有シランカップリング剤(ダイソー株式会社製カブラス2B)200g(湿式シリカ100重量部に対し、14.7重量部)と、を添加した。そして、当該混合溶液を、40℃にて1時間撹拌した。なお、当該混合溶液のpHは6であった。
Tokusil233(OSC製、BET比表面積120m2/g)を15重量%含む水分散された湿式シリカスラリー2kgに、ポリオキシエチレンオレイン酸エステル(商品名:H-3549C(第一工業製薬株式会社製)、HLB値:7)0.9g(湿式シリカ100重量部に対し、0.3重量部)と、硫黄含有シランカップリング剤(ダイソー株式会社製カブラス2B)45g(湿式シリカ100重量部に対し、15重量部)と、を添加した。そして、当該混合溶液を、室温(約23℃)にて24時間撹拌した。なお、当該混合溶液のpHは6であった。
Tokusil233(OSC製、BET比表面積120m2/g)を15重量%含む水分散された湿式シリカスラリー2kgに、ポリオキシエチレンオレイン酸エステル(商品名:H-3549B(第一工業製薬株式会社製)、HLB値:9)0.9g(湿式シリカ100重量部に対し、0.3重量部)と、硫黄含有シランカップリング剤(ダイソー株式会社製カブラス2B)45g(湿式シリカ100重量部に対し、15重量部)と、を添加した。そして、当該混合溶液を、室温(約23℃)にて24時間撹拌した。なお、当該混合溶液のpHは6であった。
TokusilUSG-L(OSC製、BET比表面積150m2/g)を15重量%含む水分散された湿式シリカスラリー4kgに、ポリオキシエチレンオレイン酸エステル(商品名:H-3549A(第一工業製薬株式会社製)、HLB値:8)9g(湿式シリカ100重量部に対し、1.5重量部)と、硫黄含有シランカップリング剤(ダイソー株式会社製カブラス4)90g(湿式シリカ100重量部に対し、15重量部)と、を添加した。そして、当該混合溶液を、40℃にて1時間撹拌した。なお、当該混合溶液のpHは7であった。
カワタ製作所製スーパーミキサーピッコロに200gのTokusil233(OSC製、BET比表面積120m2/g)を仕込み、1000rpmで撹拌しながら1gの90%DL乳酸(株式会社武蔵野化学研究所製)を添加して、更に15分間撹拌した。
Tokusil233(OSC製、BET比表面積120m2/g)を15重量%含む水分散された湿式シリカスラリー2kgに、乳化剤としてNSソープ(花王ケミカル製)0.9gと、硫黄含有シランカップリング剤(ダイソー株式会社製カブラス2B)45gと、を添加して、撹拌した。
Tokusil233(OSC製、BET比表面積120m2/g)を15重量%含む水分散された湿式シリカスラリー2kgに、ポリオキシエチレンステアリン酸エステル(商品名:H-3549S(第一工業製薬株式会社製)、HLB値:8)0.9gと、硫黄含有シランカップリング剤(ダイソー株式会社製カブラス2B)45gと、を添加した。そして、当該混合溶液を、室温(約23℃)にて24時間撹拌した。なお、当該混合溶液のpHは6であった。
充填材には、湿式シリカと硫黄含有シランカップリング剤との反応産物の他に、未反応の硫黄含有シランカップリング剤が含まれている。
Claims (18)
- 湿式シリカ、ポリオキシエチレン不飽和脂肪酸エステルおよび硫黄含有シランカップリング剤を含有することを特徴とする充填材用組成物。
- 上記湿式シリカは、湿式シリカスラリーであることを特徴とする請求項1に記載の充填材用組成物。
- 上記湿式シリカ100重量部に対し、上記硫黄含有シランカップリング剤1~20重量部を含有することを特徴とする請求項1~3の何れか1項に記載の充填材用組成物。
- 上記ポリオキシエチレン不飽和脂肪酸エステルのHLB値が、5~10であることを特徴とする請求項1~4の何れか1項に記載の充填材用組成物。
- 上記湿式シリカ100重量部に対し、上記ポリオキシエチレン不飽和脂肪酸エステル0.001~5重量部を含有することを特徴とする請求項1~5の何れか1項に記載の充填材用組成物。
- 上記湿式シリカのBET比表面積が、50~300m2/gであることを特徴とする請求項1~6の何れか1項に記載の充填材用組成物。
- 更に、塩基性物質および酸性物質からなる群より選択される少なくとも1つを含有することを特徴とする請求項1~7の何れか1項に記載の充填材用組成物。
- 上記塩基性物質は、ヒドロキシル基を含有していてもよい炭素数1~24のアルキル基を有する、モノアルキルアミン、ジアルキルアミンおよびトリアルキルアミンからなる群より選択される少なくとも1つであることを特徴とする請求項8に記載の充填材用組成物。
- 上記酸性物質は、炭素数1~18である、(ポリ)カルボン酸およびヒドロキシ酸からなる群から選択される少なくとも1つであることを特徴とする請求項8または9に記載の充填材用組成物。
- 請求項1~10の何れか1項に記載の充填材用組成物の製造方法であって、
上記湿式シリカ、ポリオキシエチレン不飽和脂肪酸エステルおよび硫黄含有シランカップリング剤を、10℃~120℃にて10分間~24時間混合することを特徴とする製造方法。 - 上記混合は、pH4~10の条件下で行われることを特徴とする請求項11に記載の製造方法。
- 請求項1~10の何れか1項に記載の充填材用組成物より得られたものであることを特徴とする充填材。
- 湿式シリカ、ポリオキシエチレン不飽和脂肪酸エステルおよび硫黄含有シランカップリング剤を含む充填材であって、
上記湿式シリカ100重量部に対し、上記硫黄含有シランカップリング剤1~20重量部を含有し、
上記湿式シリカ100重量部に対し、上記ポリオキシエチレン不飽和脂肪酸エステル0.001~5重量部を含有することを特徴とする充填材。 - 上記充填材を溶剤抽出にかけたときの上記硫黄含有シランカップリング剤の抽出量が、上記充填材の2重量%以下であることを特徴とする請求項13または14に記載の充填材。
- 請求項1~10の何れか1項に記載の充填材用組成物を乾燥させる乾燥工程を含むことを特徴とする充填材の製造方法。
- 上記乾燥工程は、スプレードライ法によって上記充填材用組成物を乾燥させる工程を含むことを特徴とする請求項16に記載の充填材の製造方法。
- 上記乾燥工程にて得られた乾燥産物を、80℃~200℃にて10分間~24時間加熱する加熱工程を含むことを特徴とする請求項16または17に記載の充填材の製造方法。
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