JP2005060655A - Slidability modifier and production process therefor, and thermoplastic resin composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a slidability modifier with high dispersibility in a thermoplastic resin, capable of enhancing slidability of the thermoplastic resin and excellent in powder handleability, to provide a production process therefor, and to obtain a thermoplastic resin composition excellent both in moldability and slidability and good in surface appearances of its molding. <P>SOLUTION: The slidability modifier comprises an organic polymer and particles of polytetrafluoroethylene with <1 million molecular weight measured by a DSC method and having ≤10μm particle diameter, where the content of the polytetrafluoroethylene particle is 20-85 mass%. The thermoplastic resin composition is added with the slidability modifier so that the amount of the polytetrafluoroethylene particles becomes 0.5-50 pts.mass to 100 pts.mass of the thermoplastic resin (A). <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a slidability modifier that imparts slidability to a thermoplastic resin and a method for producing the same. The present invention also relates to a thermoplastic resin composition that can be used in various fields.

Molded bodies made of thermoplastic resins are widely used in various fields including AV equipment such as VTRs and OA equipment such as printers, and slidability is one of the required physical properties of these molded bodies. It is done.
Conventionally, low molecular weight polytetrafluoroethylene powder or the like has been used as a modifier for imparting slidability of a thermoplastic resin. However, polytetrafluoroethylene generally lacks compatibility with the thermoplastic resin and is therefore difficult to disperse uniformly, resulting in a problem that the surface appearance of the molded product is damaged or crumpled. Moreover, the polytetrafluoroethylene powder used is several μm to several tens μm, and there is a difficulty in handling.
Incidentally, polytetrafluoroethylene fine powder having a fine particle size of several μm and a low molecular weight is commercially available. For example, “Lublon L-2, L-4, L-5” manufactured by Daikin Industries, Ltd., Mitsui Dupont Fluoro “TLP-10, TLP-10F-1” manufactured by Polymers Co., Ltd., “Fullon L-169, L-170” manufactured by Asahi Glass Co., Ltd., “Dinion TF-9201, TF-” manufactured by Sumitomo 3M Co., Ltd. 9205, TF-9207 "and the like.
Then, what contains polytetrafluoroethylene which has fibrillation ability, and an organic polymer as a slidability modifier for the purpose of solving the said problem is disclosed (refer patent document 1).
JP 2000-313783 A

However, the slidability modifier powder described in Patent Document 1 has low powder handling properties due to fibrillation of polytetrafluoroethylene. In addition, when the slidability modifier is added to the thermoplastic resin until it exhibits sufficient slidability, the dispersibility of the slidability modifier is reduced, and the resulting thermoplastic resin composition There was a drawback that the moldability was lowered.
An object of the present invention is to provide a slidability modifier having high dispersibility in a thermoplastic resin, improving the slidability of the thermoplastic resin, and having high powder handling properties, and a method for producing the same. It is in. Another object of the present invention is to provide a thermoplastic resin composition having both excellent moldability and slidability and good surface appearance.

As a result of intensive investigations by the present inventors to solve the above problems, it has been found that those having a small particle diameter and low molecular weight polytetrafluoroethylene particles and an organic polymer solve the above problems. A slidability modifier, a method for producing the same, and a thermoplastic resin composition were invented.
That is, the slidability modifier of the present invention contains polytetrafluoroethylene particles having a particle diameter of 10 μm or less and a molecular weight measured by DSC method of less than 1,000,000, and an organic polymer. The content of the fluoroethylene particles is 20% by mass to 85% by mass.
The method for producing a slidability modifier according to claim 2 of the present invention is an aqueous solution containing polytetrafluoroethylene particles having a particle size of 0.05 μm to 1.0 μm and a molecular weight measured by DSC method of less than 1 million. A mixture of the dispersion and the organic polymer particle aqueous dispersion is coagulated to form a powder.
The method for producing a slidability modifying agent according to claim 3 of the present invention is an aqueous solution containing polytetrafluoroethylene particles having a particle diameter of 0.05 μm to 1.0 μm and a molecular weight measured by DSC method of less than 1 million. In the presence of the dispersion, the monomers constituting the organic polymer are polymerized and then solidified to be powdered.
The method for producing a slidability modifier according to claim 4 of the present application is an aqueous solution containing polytetrafluoroethylene particles having a particle size of 0.05 μm to 1.0 μm and a molecular weight measured by DSC method of less than 1 million. It is characterized in that a monomer having an ethylenically unsaturated bond is emulsion-polymerized in a dispersion obtained by mixing the dispersion and an organic polymer particle aqueous dispersion, and then coagulated to form a powder.
The thermoplastic resin composition of the present invention has the above-described slidability modification so that the amount of polytetrafluoroethylene particles is 0.5 to 50 parts by mass with respect to 100 parts by mass of the thermoplastic resin (A). It is characterized in that a quality agent is added.

Since the slidability modifier of the present invention is excellent in dispersibility with respect to a thermoplastic resin, the slidability can be enhanced and the powder handling property is high.
Moreover, according to the thermoplastic resin composition of the present invention, polytetrafluoroethylene is efficiently dispersed in the thermoplastic resin. Therefore, in addition to high slidability during molding, the resulting molded product is excellent in slidability, and even if a slidability modifier is added until the slidability is fully exhibited, There is no loss. Therefore, both slidability and moldability are excellent. In addition, a molded product obtained by molding this thermoplastic resin composition has excellent surface appearance.

The sliding property modifier of the present invention is a polytetrafluoroethylene particle-containing powder containing polytetrafluoroethylene particles and an organic polymer.
The polytetrafluoroethylene particles have a particle size of 10 μm or less. Since the particle diameter of polytetrafluoroethylene does not aggregate more than 10 μm, the slidability modifier can be uniformly dispersed in the thermoplastic resin. In addition, in this specification, a particle diameter is a mass mean particle diameter.

The polytetrafluoroethylene particles have a molecular weight measured by DSC method of less than 1 million. When the molecular weight measured by the DSC method is less than 1 million, the slidability is sufficiently exhibited.
Here, in the molecular weight measurement of polytetrafluoroethylene using a differential scanning calorimeter (DSC), the heat of crystallization is measured, and the number average molecular weight is calculated based on the following equation.
Mn = 2.1 × 10 ^{10 ΔHc−5.16}
(ΔHc: DSC heat of crystallization (cal / g))
In addition, when a measurement sample is a polytetrafluoroethylene particle dispersion liquid, it measures after drying a dispersion liquid at 120 degreeC.
Representative examples of commercially available raw materials for dispersions containing polytetrafluoroethylene particles having a molecular weight of less than 1 million include “Lublon LD-6E, LDW-40E” manufactured by Daikin Industries, Ltd.

The organic polymer is not particularly limited as long as it is a polymer obtained by polymerizing an organic monomer, but has high affinity for the thermoplastic resin from the viewpoint of dispersibility when blended with the thermoplastic resin. It is preferable that
Specific examples of the monomer constituting the organic polymer include styrene, α-methylstyrene, p-methylstyrene, o-methylstyrene, t-butylstyrene, o-ethylstyrene, p-chlorostyrene, o- Aromatic vinyl monomers such as chlorostyrene, 2,4-dichlorostyrene, p-methoxystyrene, o-methoxystyrene, 2,4-dimethylstyrene; methyl acrylate, methyl methacrylate, ethyl acrylate, methacrylic acid Ethyl, butyl acrylate, butyl methacrylate, 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate, dodecyl acrylate, dodecyl methacrylate, tridecyl acrylate, tridecyl methacrylate, octadecyl acrylate, octadecyl methacrylate, acrylic acid Cyclohexyl, methacryl (Meth) acrylic acid ester monomers such as cyclohexyl acid; vinyl cyanide monomers such as acrylonitrile and methacrylonitrile; α, β-unsaturated carboxylic acids such as maleic anhydride; N-phenylmaleimide, N- Maleimide monomers such as methylmaleimide and N-cyclohexylmaleimide; Glycidyl group-containing monomers such as glycidyl methacrylate; Vinyl ether monomers such as vinyl methyl ether and vinyl ethyl ether; Carboxylic acids such as vinyl acetate and vinyl butyrate Examples thereof include vinyl monomers; olefin monomers such as ethylene, propylene, and isobutylene; and diene monomers such as butadiene, isoprene, and dimethylbutadiene. These vinyl monomers can be used alone or in admixture of two or more.
Among these vinyl monomers, aromatic vinyl monomers, (meth) acrylate monomers, and vinyl cyanide monomers are preferred from the viewpoint of affinity with thermoplastic resins. .

  In this sliding property modifier, the content of the polytetrafluoroethylene particles is 20% by mass to 85% by mass. When the content of the polytetrafluoroethylene particles is 20% by mass to 85% by mass, the moldability and dispersibility are prevented from being lowered when added to the thermoplastic resin. In addition, when the content of the polytetrafluoroethylene particles is less than 20% by mass, the amount of the slidability modifier added is increased in order to impart sufficient slidability to the thermoplastic resin, leading to an increase in cost. The other physical properties of the thermoplastic resin composition obtained may be impaired. Moreover, when it exceeds 85 mass%, when the slidability modifier is recovered as a powder, an aggregate of polytetrafluoroethylene alone is easily formed. As a result, the filter cloth is clogged at the time of dehydration, the fluidity of the powder is impaired, and further, poor dispersion is caused when the thermoplastic resin composition is formed.

 Further, in the powder of the slidability modifier, it is preferable that the polytetrafluoroethylene particles alone do not form an aggregate having a particle diameter exceeding 10 μm. If the polytetrafluoroethylene particles do not form an aggregate having a particle diameter exceeding 10 μm, the appearance of the molded product is extremely excellent when a thermoplastic resin composition containing a slidability modifier is molded.

 The slidability modifier described above contains polytetrafluoroethylene particles having a particle size of 10 μm or less and a molecular weight of less than 1,000,000, and an organic polymer, and the content of polytetrafluoroethylene particles Is 20 mass% to 85 mass%, the polytetrafluoroethylene particles and the organic polymer are uniformly mixed, and the polytetrafluoroethylene alone does not form a domain having a particle diameter exceeding 10 μm. . As a result, this slidability modifier is excellent in dispersibility with respect to the thermoplastic resin and powder handling property as well as improving the slidability of the thermoplastic resin.

Next, the manufacturing method of a sliding property modifier is demonstrated. Examples of the method for producing a slidability modifier include the following first to third production examples.
The first production example in the method for producing a slidability modifier is an aqueous solution containing polytetrafluoroethylene particles having a particle diameter of 0.05 μm to 1.0 μm and a molecular weight measured by DSC method of less than 1 million. In this method, a mixed dispersion of the dispersion and the organic polymer particle aqueous dispersion is coagulated to form a powder. According to this first production example, the powder can be recovered with relatively simple equipment.

  A second production example of the method for producing a slidability modifier is an aqueous dispersion containing polytetrafluoroethylene particles having a particle diameter of 0.05 μm to 1.0 μm and a molecular weight measured by DSC method of less than 1 million. In this method, a monomer constituting an organic polymer is polymerized in the presence of a liquid to form an organic polymer, and then solidified to form a powder. According to the second production example, since the number of steps can be reduced, it is possible to obtain a powder having high production efficiency and excellent handleability.

A third production example of the method for producing a slidability modifier is an aqueous dispersion containing polytetrafluoroethylene particles having a particle diameter of 0.05 μm to 1.0 μm and a molecular weight measured by DSC method of less than 1 million. This is a method in which a monomer having an ethylenically unsaturated bond is emulsion-polymerized in a mixed liquid obtained by mixing the liquid and an organic polymer particle aqueous dispersion, and then solidified to form a powder.
In this third production example, the monomer having an ethylenically unsaturated bond may be the same as the vinyl monomer constituting the organic polymer. Moreover, what is necessary is just to be able to emulsify the monomer which has an ethylenically unsaturated bond as an emulsifier.
According to the third production example, a slidability modifier having a structure more suitable for dispersion in a thermoplastic resin can be easily obtained, so that the slidability modification with higher dispersibility in a thermoplastic resin can be achieved. A quality agent can be obtained easily.

In the first to third production examples described above, the aqueous dispersion of polytetrafluoroethylene particles having a particle diameter of 0.05 μm to 1.0 μm and a molecular weight measured by DSC method of less than 1,000,000 is contained. It can be obtained by polymerizing tetrafluoroethylene monomer by emulsion polymerization or suspension polymerization using a fluorosurfactant.
Fluorine-containing olefins such as hexafluoropropylene, chlorotrifluoroethylene, fluoroalkylethylene, perfluoroalkyl vinyl ether, and perfluoroalkyl as copolymerization components as long as the properties of the resulting polytetrafluoroethylene are not impaired during the polymerization. Fluorine-containing alkyl (meth) acrylates such as (meth) acrylate can be used. The content of the copolymer component is preferably 10% by mass or less with respect to tetrafluoroethylene.

  Further, when the particle diameter of the polytetrafluoroethylene particles in the polytetrafluoroethylene particle aqueous dispersion is 0.05 μm to 1.0 μm, the particles of the polytetrafluoroethylene particles in the resulting sliding property modifier The diameter can be 10 μm or less. Polytetrafluoroethylene particles having a particle size of less than 0.05 μm cannot be easily produced. When the particle size exceeds 1.0 μm, the particle size of the polytetrafluoroethylene particles in the resulting slidability modifier is It is easy to exceed 10 μm.

An aqueous dispersion containing polytetrafluoroethylene particles having a particle diameter of 0.05 μm to 1.0 μm and a molecular weight measured by DSC method of less than 1,000,000 is mixed with an organic polymer particle aqueous dispersion to coagulate. In the production method of the slidability modifier to be pulverized (first production example, third production example), the production method of the organic polymer particle aqueous dispersion is not particularly limited. Examples thereof include an emulsion polymerization method and a soap-free emulsion polymerization method.
In the case of producing an organic polymer particle aqueous dispersion by the emulsion polymerization method, as an emulsifier, alkyl sulfuric acid (salt), alkylbenzene sulfonic acid (salt), alkenyl sulfosuccinic acid (salt), alkyl phosphoric acid (salt), An alkenyl succinic acid (salt) etc. are mentioned. In particular, alkylphosphoric acid (salt) and alkenyl succinic acid (salt) are preferable, and alkenyl succinic acid salt is more preferable in that a powder having a high polytetrafluoroethylene content can be obtained.

  Furthermore, in the first production example to the third production example, when solidifying and powdering, an aqueous dispersion containing polytetrafluoroethylene particles and an organic polymer is used as calcium chloride, magnesium sulfate. The solution is poured into hot water in which a metal salt such as is dissolved, salted out, solidified and then dried.

Next, the thermoplastic resin composition of the present invention will be described. The thermoplastic resin composition of the present invention is obtained by adding the above-described slidability modifier to the thermoplastic resin (A).
Examples of the thermoplastic resin (A) include almost all thermoplastic resins that are generally known. For example, styrene resins such as polystyrene (PS) and styrene / acrylonitrile copolymer resin (SAN), acrylic vinyl polymers such as polymethyl methacrylate (PMMA), polyolefin resins such as polyethylene (PE) and polypropylene (PP) , Polyvinyl chloride resin (PVC), polyphenylene ether resin (PPE) and modified products thereof, aromatic polyester resin (PET, PBT), polycarbonate resin (PC), polycaproamide (nylon 6), polyhexamethylene adipamide Polyamide resin (PA) etc. are mentioned, such as (nylon 66).
These can also use 2 or more types of components together. Furthermore, a compatibilizing agent such as a graft copolymer can be used in combination.

In addition to the thermoplastic resin (A) described above, a rubber component (B) can be blended in the thermoplastic resin composition.
Examples of the rubber component (B) include core-shell type or rubbery polymers such as elastomers. Specifically, methyl methacrylate / butadiene / styrene copolymer resin (MBS resin), acrylonitrile / butadiene / Diene-based core-shell type rubbery polymer such as styrene copolymer resin (ABS resin), acrylic core-shell type rubbery material such as acrylate / styrene / acrylonitrile copolymer resin (ASA resin), acrylate / methyl methacrylate copolymer resin, etc. Polymers, silicone / acrylate / methyl methacrylate copolymer resins, silicone core / shell type rubbery polymers such as silicone / acrylate / acrylonitrile / styrene copolymer resins, ethylene / propylene copolymer (EPR), ethylene / butene- 1 copolymer, Olefin-based thermoplastic elastomers (TPO) such as ethylene / propylene / non-conjugated diene copolymer (EPDM), ethylene / vinyl acetate copolymer (EVA), ethylene / ethyl acrylate copolymer (EEA), styrene / butadiene / Styrene block copolymer (SBS), styrene / ethylene / butylene / styrene block copolymer (SEBS), styrene / ethylene / propylene block copolymer (SEP), styrene / isoprene / styrene copolymer (SIS), etc. Styrene-based thermoplastic elastomers (TPE), and modified products thereof, such as maleic anhydride and glycidyl methacrylate, thermoplastic polyesters (TPEs), thermoplastic polyurethanes (TPU), isobutene / isoprene rubber (IIR), polyisoprene (IR) ), Heaven Rubber (NR), butadiene / acrylonitrile copolymer (NBR), butadiene / styrene copolymer (SBR) and the like. Moreover, these can also be used in combination of 2 or more types.
The content of the rubber component (B) is 0 to 100 parts by mass with respect to 100 parts by mass of the thermoplastic resin (A). If the amount is more than 100 parts by mass, the thermoplastic resin composition becomes too soft and adhesion is increased, which is not preferable.

  In this thermoplastic resin composition, a slidability modifier is added so that the amount of polytetrafluoroethylene particles is 0.5 to 50 parts by mass with respect to 100 parts by mass of the thermoplastic resin (A). ing. When the amount of the slidability modifier is such that the amount of polytetrafluoroethylene particles is less than 0.5 parts by mass, the effect of imparting slidability is poor, and the amount of polytetrafluoroethylene particles exceeds 50 parts by mass. The surface appearance deteriorates with the added amount.

  Furthermore, in the thermoplastic resin composition, reinforcing agents and fillers such as pigments, dyes, glass fibers, metal fibers, metal flakes, and carbon fibers, as long as the original purpose is not impaired, 2,6-di-butyl- Phenolic antioxidants such as 4-methylphenol, 4,4'-butylidene-bis (3-methyl-6-t-butylphenol), tris (mixed, mono and dinylphenyl) phosphite, diphenyl isodecyl phosphite Phosphite-based antioxidants such as dilauryl thiodipropionate, dimyristyl thiodipropionate disterial thiodipropionate, sulfur-based antioxidants, 2-hydroxy-4-octoxybenzophenone, 2- (2 -Hydroxy-5-methylphenyl) benzotriazole and other benzotriazole UV absorbers , Light stabilizers such as bis (2,2,6,6) -tetramethyl-4-piperidinyl), antistatic agents such as hydroxylalkylamines, sulfonates, lubricants such as ethylenebisstearylamide, metal soaps, and Various additives such as flame retardants such as tetrabromophenol A, decabromophenol oxide, TBA epoxy oligomer, TBA polycarbonate oligomer, antimony trioxide, TPP, and phosphate ester can be appropriately blended. By blending such various additives, more desirable physical properties and characteristics can be adjusted.

In order to produce a thermoplastic resin composition, a sliding modifier, a thermoplastic resin (A), and a rubber component (B) and additives are blended in a predetermined amount as required, and a roll, a Banbury mixer, a uniaxial Kneading is carried out with a normal kneader such as an extruder or a twin screw extruder. In that case, it is preferable to use pellet form.
Moreover, a master pellet containing a high concentration of a slidability modifier is prepared, and the master pellet is diluted with a thermoplastic resin (A) and, if necessary, a rubber component (B) to obtain a thermoplastic resin composition. It may be manufactured.

  There is no restriction | limiting in particular as a processing method of this thermoplastic resin composition, For example, injection molding, calendar molding, blow molding, extrusion molding, thermoforming, foam molding, melt spinning etc. can be mentioned. And by such a processing method, an injection molded product, a sheet, a film, a hollow molded product, a pipe, a square bar, a deformed product, a thermoformed product, a foamed product, a fiber and the like can be obtained.

  The thermoplastic resin composition described above is obtained by adding a slidability modifier to the thermoplastic resin (A), and polytetrafluoroethylene is efficiently dispersed in the thermoplastic resin. The slipperiness of the molded product obtained is excellent in addition to high slipperiness at the time. Further, even if a slidability modifier is added until the slidability is sufficiently exhibited, the moldability is not impaired. Therefore, both slidability and moldability are excellent. Furthermore, since the formation of macro-aggregates of polytetrafluoroethylene is prevented by the slidability modifier, the molded article of this thermoplastic resin composition is excellent in surface appearance.

Hereinafter, the present invention will be described in more detail with reference to examples. In the following examples, “part” means part by mass. Various physical properties are measured by the following methods.
(1) Solid content concentration: Determined by drying the particle dispersion at 170 ° C. for 30 minutes.
(2) Particle size distribution, mass average particle size: A sample liquid obtained by diluting a particle dispersion with water was used as a dynamic light scattering method (“ELS800” manufactured by Otsuka Electronics Co., Ltd., temperature 25 ° C., scattering angle 90 °). ).
(3) Sliding property: Using a 75-t injection molding machine, a hollow cylindrical test piece having an outer diameter of 25.6 mm and an inner diameter of 20.0 mm was molded, and a thrust frictional wear test was performed based on the JIS K7218A method. It was measured. The same material as the test piece was used as the counterpart material.
The dynamic friction coefficient was measured at a room temperature of 23 ° C. and a humidity of 50% in a load of 2 kg and a running speed of 10 cm / second.
The dynamic friction coefficient is obtained by the following equation.
μ = f × r / L × R (−)
μ: Dynamic friction coefficient f: Frictional force detected by load cell R: Sample average radius r: Shaft center load cell length L: Load Specific wear amount was measured at a room temperature of 23 ° C. and a humidity of 50% under a load of 2 kg and running speed. The measurement was performed at 10 cm / second and a travel distance of 8.64 km.
The specific wear amount is obtained by the following equation.
A = ΔW / P × l × α (mm ³ / N · m)
A: Specific wear amount ΔW: Sample mass change P: Load
l: Travel distance α: Sample density

(4) Surface scratch resistance A test piece was molded using a 75 t injection molding machine, the surface was rubbed with steel wool, and the surface scratch resistance was evaluated according to the following criteria.
○: Scratches are hardly seen on the surface.
Δ: Scratches are observed on the surface.
X: Scratches are visible and worn.
(5) Surface appearance A test piece was molded using a 75t injection molding machine, and the surface appearance of the test piece was evaluated according to the following criteria.
○: Smooth and good appearance △: Slight surface roughness is observed ×: Surface roughness is severe and the appearance is poor (6) Dispersibility A 0.3 mm thick film is formed using a φ25 single screw extruder The dispersion state of polytetrafluoroethylene in the product was evaluated according to the following criteria.
○: Almost no △: Some stuff is seen ×: Many stuff

[Modifier Example 1: Sliding Modifier (C-1)]
In a separable flask equipped with a stirring blade, a condenser, a thermocouple, and a nitrogen inlet, 290 parts of distilled water, 1.5 parts of sodium dodecylbenzenesulfonate, 80 parts of styrene, 20 parts of acrylonitrile, 0.5 part of cumene hydroperoxide Was heated to 50 ° C. under a nitrogen stream. Next, a radical liquid polymerization was started by adding 0.001 part of iron (II) sulfate, 0.003 part of disodium ethylenediaminetetraacetate, 0.24 part of Rongalite salt and 10 parts of distilled water. After the heat generation was completed, the temperature in the system was maintained at 50 ° C. for 1 hour to complete the polymerization, and an organic polymer particle dispersion (P-1) was obtained. This organic polymer particle dispersion (P-1) had a solid concentration of 25.0% by mass, a particle size distribution showing a single peak, and a mass average particle size of 90 nm.
In addition, “Lublon LDW-40E” manufactured by Daikin Co., Ltd. was used as the polytetrafluoroethylene-based particle dispersion. “Lublon LDW-40E” had a solid concentration of 40% by mass, a particle size distribution showing a single peak, a mass average particle size of 200 nm, and a molecular weight of 400,000 by DSC method.

  In a separable flask equipped with a stirrer, 200 parts of organic polymer particle dispersion (P-1) (50 parts of organic polymer) and 125 parts of “Lublon LDW-40E” (50 parts of polytetrafluoroethylene particles) were added. The mixture was stirred and stirred at room temperature for 30 minutes. Through the series of operations, no solid matter separation was observed, and a uniform particle dispersion was obtained. This particle dispersion is put into 700 parts of hot water at 90 ° C. containing 5 parts of calcium chloride to solidify and separate the solid matter, and then filtered and dried with a filter cloth to change the slidability modifier (C -1) 99 parts were obtained.

[Modifier Example 2: Sliding property modifier (C-2)]
In a separable flask equipped with a stirrer, 200 parts of organic polymer particle dispersion (P-1) (50 parts of organic polymer) and 125 parts of “Lublon LDW-40E” (50 parts of polytetrafluoroethylene particles) were added. Instead of charging, 120 parts of organic polymer particle dispersion (P-1) (30 parts of organic polymer) and 175 parts of “Lublon LDW-40E” (70 parts of polytetrafluoroethylene) were added to a separator equipped with a stirrer. 100 parts of a slidability modifier (C-2) was obtained in the same manner as the modifier Example 1 except that it was charged in a bull flask.

[Modifier Example 3: Sliding property modifier (C-3)]
In a separable flask equipped with a stirring blade, a condenser, a thermocouple, and a nitrogen inlet, 290 parts of distilled water, 2.0 parts of sodium dodecylbenzenesulfonate, 70 parts of methyl methacrylate, 30 parts of methyl acrylate, and cumene hydroperoxide were added. 5 parts were charged and heated to 60 ° C. under a nitrogen stream. Next, a radical liquid polymerization was started by adding 0.001 part of iron (II) sulfate, 0.003 part of disodium ethylenediaminetetraacetate, 0.24 part of Rongalite salt and 10 parts of distilled water. After the heat generation was completed, the temperature in the system was maintained at 60 ° C. for 1 hour to complete the polymerization, and an organic polymer particle dispersion (P-2) was obtained. This organic polymer particle dispersion (P-2) had a solid content concentration of 24.9% by mass, a particle size distribution showing a single peak, and a mass average particle size of 86 nm.

  Separable equipped with stirrer 200.8 parts of organic polymer particle dispersion (P-2) (50 parts of organic polymer) and 125 parts of "Lublon LDW-40E" (50 parts of polytetrafluoroethylene particles) The flask was charged and stirred at room temperature for 30 minutes. Through the series of operations, no solid matter separation was observed, and a uniform particle dispersion was obtained. This particle dispersion is put into 700 parts of hot water at 90 ° C. containing 5 parts of calcium chloride to solidify and separate the solid matter, and then filtered and dried with a filter cloth to change the slidability modifier (C -3) 100 parts were obtained.

[Modifier Example 4: Sliding property modifier (C-4)]
Separable equipped with stirrer 200.8 parts of organic polymer particle dispersion (P-2) (50 parts of organic polymer) and 125 parts of "Lublon LDW-40E" (50 parts of polytetrafluoroethylene particles) Instead of charging into the flask, 120.5 parts of organic polymer particle dispersion (P-2) (30 parts of organic polymer) and 175 parts of “Lublon LDW-40E” (70 parts of polytetrafluoroethylene particles) were added. 99 parts of a slidability modifier (C-4) was obtained in the same manner as the modifier Example 3 except that it was charged in a separable flask equipped with a stirrer.

[Modifier Example 5: Sliding Modifier (C-5)]
In a separable flask equipped with a stirring blade, a condenser, a thermocouple, a nitrogen inlet, and a dropping funnel, 125 parts of “Lublon LDW-40E” (50 parts of polytetrafluoroethylene particles), 1.0 part of dodecylbenzenesulfonic acid, distillation 215 parts of water was charged and heated to 70 ° C. under a nitrogen stream. Next, after adding 0.001 part of iron (II) sulfate, 0.003 part of disodium ethylenediaminetetraacetate, 0.24 part of Rongalite salt and 10 parts of distilled water, 40 parts of styrene, 10 parts of acrylonitrile, A mixture of 0.3 parts of butyl peroxide was added dropwise from a dropping funnel in 120 minutes to allow radical polymerization to proceed, and after completion of the addition, the internal temperature was maintained at 70 ° C. for 1 hour to obtain 50 parts of an organic polymer. Formed. Through the series of operations, no solid matter separation was observed, and a uniform particle dispersion was obtained. This particle dispersion had a solid content concentration of 25.0% by mass, a relatively broad particle size distribution, and a mass average particle size of 238 nm.
Then, this particle dispersion is put into 700 parts of hot water of 90 ° C. containing 5 parts of calcium chloride, solids are solidified and separated, and then filtered and dried with a filter cloth, thereby improving the sliding property modifier. (C-5) 100 parts were obtained.

[Modifier Example 6: Sliding Modifier (C-6)]
In a separable flask equipped with a stirring blade, a condenser, a thermocouple, a nitrogen inlet, and a dropping funnel, 175 parts of “Lublon LDW-40E” (70 parts of polytetrafluoroethylene particles), 1.0 part of dodecylbenzenesulfonic acid, distillation 185 parts of water was charged and heated to 80 ° C. under a nitrogen stream. Next, a mixed liquid of 0.001 part of iron (II) sulfate, 0.003 part of disodium ethylenediaminetetraacetate, 0.24 part of Rongalite salt and 10 parts of distilled water was added, and then 24 parts of styrene, 6 parts of acrylonitrile, A mixture of 0.3 parts of butyl peroxide was dropped from a dropping funnel in 120 minutes to allow radical polymerization to proceed, and after completion of the dropping, the internal temperature was maintained at 80 ° C. for 1 hour to form 30 parts of an organic polymer. It was. Through the series of operations, no solid matter separation was observed, and a uniform particle dispersion was obtained. This particle dispersion had a solid content concentration of 24.8% by mass, a relatively broad particle size distribution, and a mass average particle size of 226 nm.
Then, this particle dispersion is put into 700 parts of hot water at 90 ° C. containing 5 parts of calcium chloride, solids are solidified and separated, and then filtered and dried with a filter cloth, thereby improving the sliding property modifier. (C-6) 99 parts were obtained.

[Modifier Example 7: Sliding Modifier (C-7)]
In a separable flask equipped with a stirring blade, a condenser, a thermocouple, a nitrogen inlet, and a dropping funnel, 125 parts of “Lublon LDW-40E” (50 parts of polytetrafluoroethylene particles), 1.0 part of dodecylbenzenesulfonic acid, distillation 215 parts of water was charged and heated to 70 ° C. under a nitrogen stream. Then, after adding 0.001 part of iron (II) sulfate, 0.003 part of disodium ethylenediaminetetraacetate, 0.24 part of Rongalite salt and 10 parts of distilled water, 35 parts of methyl methacrylate and 15 parts of methyl acrylate Then, a mixture of tertiary butyl peroxide (0.3 parts) was added dropwise from a dropping funnel in 60 minutes to allow radical polymerization to proceed, and after completion of the addition, the internal temperature was maintained at 70 ° C. for 1 hour to maintain the organic polymer 50. Parts were formed. Through the series of operations, no solid matter separation was observed, and a uniform particle dispersion was obtained. This particle dispersion had a solid content concentration of 24.8% by mass, a relatively broad particle size distribution, and a mass average particle size of 240 nm.
Then, this particle dispersion is put into 700 parts of hot water at 90 ° C. containing 5 parts of calcium chloride, solids are solidified and separated, and then filtered and dried with a filter cloth, thereby improving the sliding property modifier. 98 parts of (C-7) were obtained.

[Modifier Example 8: Sliding property modifier (C-8)]
In a separable flask equipped with a stirring blade, a condenser, a thermocouple, a nitrogen inlet, and a dropping funnel, 175 parts of “Lublon LDW-40E” (70 parts of polytetrafluoroethylene), 1.0 part of dodecylbenzenesulfonic acid, distilled water 185 parts were charged and heated to 80 ° C. under a nitrogen stream. Next, after adding a mixed solution of 0.001 part of iron (II) sulfate, 0.003 part of disodium ethylenediaminetetraacetate, 0.24 part of Rongalite salt and 10 parts of distilled water, 21 parts of methyl methacrylate and 9 parts of methyl acrylate Then, a mixed solution of tertiary butyl peroxide (0.3 parts) was added dropwise from a dropping funnel in 60 minutes to allow radical polymerization to proceed. After completion of the addition, the internal temperature was maintained at 80 ° C. for 1 hour to obtain 30 parts of an organic polymer. Formed. Through the series of operations, no solid matter separation was observed, and a uniform particle dispersion was obtained. This particle dispersion had a solid content concentration of 24.9% by mass, a relatively broad particle size distribution, and a mass average particle size of 220 nm.
Then, this particle dispersion is put into 700 parts of hot water at 90 ° C. containing 5 parts of calcium chloride, solids are solidified and separated, and then filtered and dried with a filter cloth, thereby improving the sliding property modifier. (C-8) 99 parts were obtained.

[Modifier Comparative Example 1: Sliding property modifier (C-9)]
In a separable flask equipped with a stirrer, 40 parts of an organic polymer particle dispersion (P-1) (10 parts of an organic polymer) and 225 parts of “Lublon LDW-40E” (90 parts of polytetrafluoroethylene particles) were added. The mixture was stirred and stirred at room temperature for 30 minutes. Through the series of operations, no solid matter separation was observed, and a uniform particle dispersion was obtained. Then, this particle dispersion is put into 700 parts of hot water at 90 ° C. containing 5 parts of calcium chloride, solids are solidified and separated, and then filtered and dried with a filter cloth, thereby improving the sliding property modifier. 97 parts of (C-9) were obtained. During filtration, the filter cloth was clogged with polytetrafluoroethylene aggregates.

[Modifier Comparative Example 2: Sliding property modifier (C-10)]
Separable equipped with stirrer 40.1 parts of organic polymer particle dispersion (P-2) (10 parts of organic polymer) and 225 parts of “Lublon LDW-40E” (90 parts of polytetrafluoroethylene particles) The flask was charged and stirred at room temperature for 30 minutes. Through the series of operations, no solid matter separation was observed, and a uniform particle dispersion was obtained. Then, this particle dispersion is put into 700 parts of hot water at 90 ° C. containing 5 parts of calcium chloride, solids are solidified and separated, and then filtered and dried with a filter cloth, thereby improving the sliding property modifier. 98 parts of (C-10) were obtained. During filtration, the filter cloth was clogged with polytetrafluoroethylene aggregates.

[Modifier Comparative Example 3: Sliding property modifier (C-11)]
In a separable flask equipped with a stirring blade, a condenser, a thermocouple, a nitrogen inlet, and a dropping funnel, 225 parts of “Lublon LDW-40E” (90 parts of polytetrafluoroethylene particles), 1.0 part of dodecylbenzenesulfonic acid, distillation 155 parts of water was charged and heated to 70 ° C. under a nitrogen stream. Next, a mixed liquid of 0.001 part of iron (II) sulfate, 0.003 part of disodium ethylenediaminetetraacetate, 0.24 part of Rongalite salt and 10 parts of distilled water was added, and then 8 parts of styrene, 2 parts of acrylonitrile, A mixture of 0.3 parts of butyl peroxide was added dropwise from a dropping funnel in 30 minutes to allow radical polymerization to proceed, and after completion of the addition, the internal temperature was maintained at 70 ° C. for 1 hour to form 10 parts of an organic polymer. I let you. Through the series of operations, no solid matter separation was observed, and a uniform particle dispersion was obtained. This particle dispersion had a solid content concentration of 25.0% by mass, a relatively broad particle size distribution, and a mass average particle size of 215 nm.
Then, this particle dispersion is put into 700 parts of hot water at 90 ° C. containing 5 parts of calcium chloride, solids are solidified and separated, and then filtered and dried with a filter cloth, thereby improving the sliding property modifier. 97 parts of (C-11) were obtained. During filtration, the filter cloth was clogged with polytetrafluoroethylene aggregates.

[Modifier Comparative Example 4: Sliding property modifier (C-12)]
In a separable flask equipped with a stirring blade, a condenser, a thermocouple, a nitrogen inlet, and a dropping funnel, 225 parts of “Lublon LDW-40E” (90 parts of polytetrafluoroethylene particles), 1.0 part of dodecylbenzenesulfonic acid, distillation 155 parts of water was charged and heated to 70 ° C. under a nitrogen stream. Next, after adding a mixed solution of 0.001 part of iron (II) sulfate, 0.003 part of disodium ethylenediaminetetraacetate, 0.24 part of Rongalite salt and 10 parts of distilled water, 7 parts of methyl methacrylate and 3 parts of methyl acrylate Then, a mixture of tertiary butyl peroxide (0.3 parts) was added dropwise from a dropping funnel over 30 minutes to allow radical polymerization to proceed. After completion of the addition, the internal temperature was maintained at 70 ° C. for 1 hour to maintain 10 parts of an organic polymer. Formed. Solid separation was not seen through a series of operations, and a uniform particle dispersion was obtained. This particle dispersion had a solid content concentration of 25.0% by mass, a relatively broad particle size distribution, and a mass average particle size of 215 nm.
Then, this particle dispersion is put into 700 parts of hot water at 90 ° C. containing 5 parts of calcium chloride, solids are solidified and separated, and then filtered and dried with a filter cloth, thereby improving the sliding property modifier. 98 parts of (C-12) were obtained. During filtration, the filter cloth was clogged with polytetrafluoroethylene aggregates.

[Modifier Comparative Example 5: Sliding property modifier (C-13)]
“AD938” manufactured by Asahi Glass Co., Ltd. was used as the polytetrafluoroethylene particle dispersion. “AD938” had a solid concentration of 60% by mass, a particle size distribution showing a single peak, a mass average particle size of 230 nm, and a molecular weight by DSC method of 5.3 million.
200 parts of organic polymer particle dispersion (P-1) (50 parts of organic polymer) and 83.3 parts of “AD938” (50 parts of polytetrafluoroethylene particles) are charged into a separable flask equipped with a stirrer. And stirred at room temperature for 30 minutes. Through the series of operations, no solid matter separation was observed, and a uniform particle dispersion was obtained. Then, this particle dispersion is put into 700 parts of hot water at 90 ° C. containing 5 parts of calcium chloride, solids are solidified and separated, and then filtered and dried with a filter cloth, thereby improving the sliding property modifier. 99 parts of (C-13) were obtained.

[Modifier Comparative Example 6: Sliding property modifier (C-14)]
In a separable flask equipped with a stirring blade, condenser, thermocouple, nitrogen inlet, and dropping funnel, 83.3 parts of “AD938” (50 parts of polytetrafluoroethylene particles), 1.0 part of dodecylbenzenesulfonic acid, distilled water 215 parts were charged and heated to 70 ° C. under a nitrogen stream. Next, after adding 0.001 part of iron (II) sulfate, 0.003 part of disodium ethylenediaminetetraacetate, 0.24 part of Rongalite salt and 10 parts of distilled water, 40 parts of styrene, 10 parts of acrylonitrile, A mixture of 0.3 parts of butyl peroxide is added dropwise from a dropping funnel in 120 minutes to allow radical polymerization to proceed. After completion of the addition, the internal temperature is maintained at 70 ° C. for 1 hour to form 50 parts of an organic polymer. I let you. Through the series of operations, no solid matter separation was observed, and a uniform particle dispersion was obtained. This particle dispersion had a solid content concentration of 25.0% by mass, a relatively broad particle size distribution, and a mass average particle size of 245 nm.
Then, this particle dispersion is put into 700 parts of hot water at 90 ° C. containing 5 parts of calcium chloride, solids are solidified and separated, and then filtered and dried with a filter cloth, thereby improving the sliding property modifier. 98 parts of (C-14) were obtained.

[Modifier Example 9: Sliding Modifier (C-15)]
In a separable flask equipped with a stirring blade, condenser, thermocouple, nitrogen inlet, 290 parts of distilled water, emulsifier: sodium mono-isotridecyloxyhexaoxyethylene phosphate and di-isotridecyloxyhexaoxyethylene phosphate A 1: 1 (mass ratio) mixture with sodium (trade name: Phosphanol RS-610NA, manufactured by Toho Chemical Co., Ltd.) 2.0 parts, 80 parts of methyl methacrylate, 20 parts of butyl acrylate, under a nitrogen stream The temperature was raised to 60 ° C. Subsequently, 0.15 parts of potassium persulfate and 10 parts of distilled water were added to initiate radical polymerization. After the heat generation was completed, the temperature in the system was maintained at 60 ° C. for 1 hour to complete the polymerization, and an organic polymer particle dispersion (P-3) was obtained. This organic polymer particle dispersion (P-3) had a solid content concentration of 25.3 mass%, a particle size distribution showing a single peak, and a mass average particle size of 132 nm.
In a separable flask equipped with a stirrer, 120 parts of organic polymer particle dispersion (P-3) (30 parts of organic polymer) and 175 parts of “Lublon LDW-40E” (70 parts of polytetrafluoroethylene particles) were added. The mixture was stirred and stirred at room temperature for 30 minutes. Through the series of operations, no solid matter separation was observed, and a uniform particle dispersion was obtained. This particle dispersion is put into 500 parts of hot water at 90 ° C. containing 5 parts of calcium acetate to solidify and separate the solid matter, and then filtered and dried with a filter cloth to obtain a sliding property modifier (C -15) 100 parts were obtained.

[Modifier Example 10: Sliding Modifier (C-16)]
As an emulsifier, a 1: 1 (mass ratio) mixture of sodium mono-isotridecyloxyhexaoxyethylene phosphate and sodium di-isotridecyloxyhexaoxyethylene phosphate (trade name: manufactured by Toho Chemical Co., Ltd.) Organic polymer particle dispersion in the same manner as in Example 9 except that dipotassium alkenyl succinate (trade name: Latemul ASK manufactured by Kao Corporation) was used instead of phosphanol RS-610NA). (P-4) was obtained. This organic polymer particle dispersion (P-4) had a solid content concentration of 25.3 mass%, a particle size distribution showing a single peak, and a mass average particle size of 107 nm.
Slidability modifier (C) in the same manner as modifier Example 9 except that organic polymer particle dispersion (P-4) was used instead of organic polymer particle dispersion (P-3). -16) 100 parts were obtained.

[Modifier Example 11: Sliding Modifier (C-17)]
Instead of using 120 parts of organic polymer particle dispersion (P-3) (30 parts of organic polymer) and 175 parts of “Lublon LDW-40E” (70 parts of polytetrafluoroethylene particles), an organic polymer is used. Similar to the modifier Example 9 except that 80 parts of particle dispersion (P-4) (20 parts of organic polymer) and 200 parts of “Lublon LDW-40E” (80 parts of polytetrafluoroethylene particles) were used. In this manner, 100 parts of a slidability modifier (C-17) was obtained.

[Modifier Example 12: Sliding property modifier (C-18)]
Instead of using 120 parts of organic polymer particle dispersion (P-3) (30 parts of organic polymer) and 175 parts of “Lublon LDW-40E” (70 parts of polytetrafluoroethylene particles), an organic polymer is used. Modifier Example 9 except that 60 parts of particle dispersion (P-4) (15 parts of organic polymer) and 212.5 parts of “Lublon LDW-40E” (85 parts of polytetrafluoroethylene particles) were used. In the same manner, 99 parts of a slidability modifier (C-18) was obtained.

[Modifier Example 13: Sliding property modifier (C-19)]
Instead of using 2.0 parts of alkenyl succinic acid dipotassium (Latemul ASK, manufactured by Kao), the organic organic polymer particle dispersion (P- 5) was obtained. This organic polymer particle dispersion (P-5) had a solid content concentration of 26.1% by mass, a particle size distribution showing a single peak, and a mass average particle size of 103 nm.
Then, a slidability modifier (in the same manner as the modifier Example 12 except that the organic polymer particle dispersion (P-5) was used instead of the organic polymer particle dispersion (P-4)). C-19) 100 parts were obtained.

 As apparent from the modifier comparative examples 1 to 4, when the polytetrafluoroethylene content exceeds 85 parts, the polytetrafluoroethylene aggregates, which causes clogging of the filter cloth and hinders production.

[Examples 1 to 33]
As shown in Tables 1 to 4, 100 parts of the thermoplastic resin (A) is blended with the rubber component (B) and the slidability modifier (unit: part) and extruded by an extruder (die) The temperature is described in the table), and pellets of the thermoplastic resin composition were obtained. This pellet was molded using a 75t injection molding machine (cylinder temperature is described in the table), and a thrust type frictional wear test, surface scratch resistance, and surface appearance were evaluated. The results are shown in Tables 1-4.

[Comparative Examples 1-29]
In addition, as a comparative example, as shown in Tables 5 to 7, a commercially available polytetrafluoroethylene powder ("Lublon L-5F" manufactured by Daikin Industries, Ltd .: molecular weight by DSC method is 500,000) was added (Comparison Example 1), without adding a sliding modifier, or added too little or excessively (Comparative Examples 2, 3, 11 to 29), a sliding modifier outside the scope of the present invention was added Things (Comparative Examples 4 to 9) were evaluated in the same manner as in Examples 1 to 28. Moreover, what added the high molecular weight polytetrafluoroethylene powder ("Fluon CD-1" by Asahi Glass Co., Ltd .: The molecular weight by DSC method is 3.2 million) was also evaluated (Comparative Example 10). “Lublon L-5F” is a low molecular weight polytetrafluoroethylene particle that does not contain an organic polymer. The evaluation results are shown in Tables 5-7.

In the table, the following were used for the thermoplastic resin (A).
PS: Sumitomo Chemical Co., Ltd. “Sumibright M140”
SAN: Asahi Kasei Corporation “AP789”
PMMA: Mitsubishi Rayon Co., Ltd. “Acripet VH”
PVC: 100 parts of polyvinyl chloride resin “TK700”, Shin-Etsu Chemical Co., Ltd., 3 parts of dioctyl tin mercaptide as a stabilizer and lubricant, 2 parts of Mitsubishi Rayon Co., Ltd. “Metablene P-550”, Mitsubishi Rayon Co., Ltd. 1 part of “P-710” was mixed with a Henschel mixer for 10 minutes until 110 ° C.
PP: Nippon Polychem “NOVATEC FY-6H”
HDPE: Nippon Polychem Co., Ltd. “NOVATEC HY430”
PC: Mitsubishi Engineering Plastics Co., Ltd. “NOVAREX 7022A”
PPE: (2,6-dimethyl-1,4-phenylene) ether, reduced viscosity (η _{sp / c} ) = 0.59 dl / g
PBT: Mitsubishi Rayon Co., Ltd. “Tough Pet N1000”
PET: Mitsubishi Rayon Co., Ltd. “KR582”
PA6: Toray Industries, Inc. “CM1017”
PA66: Toray Industries, Inc. “CM3001N”
HIPS: Sumitomo Chemical Co., Ltd. “Sumibright E580”
ABS: Mitsubishi Rayon Co., Ltd. “Diapet 3001”

The following was used for the rubbery polymer (B).
MBS: Mitsubishi Rayon Co., Ltd. “Metabrene C223A”
SAS: Mitsubishi Rayon Co., Ltd. “Metablene SX006”
AR: Mitsubishi Rayon Co., Ltd. “Metablene W341”
SiR: Mitsubishi Rayon Co., Ltd. “Metablene S2001”
EPR: Mitsui Chemicals, Inc. “Toughmer P0680”
SEBS: Shell Chemical Co., Ltd. “Clayton G1650”

As is apparent from Tables 1 to 7, the thermoplastic resin compositions of Examples 1 to 33 contain the slidability modifier of the present invention, so that the slidability is excellent and the surface is scratched. In addition to being difficult, the surface appearance of the molded product was also good. Moreover, the moldability was also excellent.
On the other hand, since the thermoplastic resin composition of Comparative Example 1 was added with polytetrafluoroethylene particles not containing an organic polymer, the dispersibility was low and the surface appearance was not good.
The thermoplastic resin composition of Comparative Example 2 had a low sliding property because the amount of the sliding property modifier added was too small.
In the thermoplastic resin composition of Comparative Example 3, since the amount of the slidability modifier added was excessive, the dispersibility of the slidability modifier was low and the surface appearance was not good.
Since the thermoplastic resin compositions of Comparative Examples 4 to 9 were those to which a slidability modifier outside the scope of the present invention was added, the dispersibility was low.
Since the thermoplastic resin composition of Comparative Example 10 had a high molecular weight of polytetrafluoroethylene, the sliding property was low.
Since the thermoplastic resin compositions of Comparative Examples 11 to 29 did not contain a slidability modifier, the slidability was low.

Claims (5)

  It contains polytetrafluoroethylene particles having a particle diameter of 10 μm or less and a molecular weight measured by DSC method of less than 1 million, and an organic polymer, and the content of polytetrafluoroethylene particles is 20% by mass to 85% by mass. A slidability modifier characterized by   Coagulating a mixture of an aqueous dispersion containing polytetrafluoroethylene particles having a particle diameter of 0.05 μm to 1.0 μm and a molecular weight measured by DSC method of less than 1 million, and an organic polymer particle aqueous dispersion. A method for producing a slidability modifier, characterized by being powdered.   In the presence of an aqueous dispersion containing polytetrafluoroethylene particles having a particle size of 0.05 μm to 1.0 μm and a molecular weight measured by DSC method of less than 1 million, a monomer constituting the organic polymer is used. A method for producing a slidability modifier, characterized by solidification and pulverization after polymerization.   Dispersion obtained by mixing an aqueous dispersion containing polytetrafluoroethylene particles having a particle size of 0.05 μm to 1.0 μm and a molecular weight measured by DSC method of less than 1 million, and an organic polymer particle aqueous dispersion In particular, a method for producing a slidability modifier, comprising emulsion-polymerizing a monomer having an ethylenically unsaturated bond and then solidifying the powder into powder. The slidability modifier according to claim 1 is added so that the amount of polytetrafluoroethylene particles is 0.5 to 50 parts by mass with respect to 100 parts by mass of the thermoplastic resin (A). A thermoplastic resin composition characterized by comprising: