JPH1087952A - Flame-retardant resin composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a flame-retardant resin hardly having yellowing, irregular coloring, discoloration, foreign particles, etc., excellent in heat stability and hardly causing clogging of mesh in extruders and surging phenomenon and excellent in productivity and flame retardance. SOLUTION: This resin composition contains (A) 100 pts.wt. rubber-reinforced resin, (B) 0.1-50 pts.wt. flame retardant, (C) 0.01-1 pts.wt. polytetrafluoroethylene powder having 1,000,000 to 20,000,000 molecular weight and further (D) 0.1-10 pts.wt. at least one kind of additive for kneading and granulation selected from among ethylenebisstearoamide, calcium stearate, magnesium stearate, zinc stearate and sodium stearate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a flame-retardant thermoplastic resin composition, which is used for burning, unevenness of color, and color change of resin.
The present invention relates to a resin composition which is excellent in heat stability with little dust and the like, less in mesh clogging and surging in an extruder, excellent in productivity, and excellent in flame retardancy. More specifically, the present invention relates to a resin composition having excellent flame retardancy used in the fields of automobile parts, OA equipment housing parts, electric appliances, furniture and the like.

[0002]

2. Description of the Related Art Flame retardant technology for resins has become an important technology in various fields in accordance with the tightening of flame retardant regulations, such as OA fields such as computers, word processors and copiers, and televisions and game machines. It is becoming one of the indispensable characteristics in the field of general home appliances.

[0003] In particular, Underwriters' Laboratori.
es) It is important that the resin be ranked at a high flame retardant level in the UL fire test according to the standard (UL94). In response to such demands, various devices have been devised for imparting flame retardancy to certain rubber-reinforced resins typified by ABS resins and the like. In many cases, flame retardancy is achieved by using a halogen-based organic compound and antimony trioxide in combination with a thermoplastic resin. Furthermore, a method of adding polytetrafluoroethylene powder or chlorinated polyethylene to impart non-dripping property to the resin composition is also known. For example, JP-A-53-65353 discloses AB
To make the S resin flame-retardant, chlorinated polyethylene should be 3-1
Although it is described that 2 parts by weight are blended, such a composition has insufficient heat stability, causes resin burn or dust during extrusion granulation or molding, uneven color during molding,
Color change due to molding conditions occurred, and the defective rate of molded products tended to increase. Also, JP-A-59-98158
Gazette, Japanese Patent Publication No. Hei 7-39529, JP-A-61-8
9241 describes blending a flame retardant and polytetrafluoroethylene powder with an ABS resin. Although this composition has been successful in terms of flame retardancy and non-dropping properties, it has been described that the composition is extruded by an extruder. Fiber formation of polytetrafluoroethylene powder during granulation not only blocks rubber reinforced resin and flame retardant in the extruder hopper and feed pipe, but also causes surging, mesh clogging and vent up, resulting in insufficient productivity Met. On the other hand, Japanese Patent Publication No. 6-18979 describes a method using an aqueous dispersion of polytetrafluoroethylene, which has some effects on both productivity and thermal stability. The property was an aqueous dispersion, which was economically disadvantageous because a masterbatch with a rubber-reinforced resin was separately manufactured.

[0004]

The problem to be solved by the present invention is to provide a flame-retardant resin composition of a rubber-reinforced resin, which is excellent in heat stability with less resin burn, uneven color, color change, dust, etc. An object of the present invention is to provide a flame-retardant resin which is excellent in productivity with little mesh clogging or surging phenomenon in an extruder and excellent in flame retardancy.

[0005]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above problems, and have found that a rubber-reinforced resin represented by ABS resin, a flame retardant, and polytetrafluoroethylene powder are granulated by an extruder. In the process of kneading, the resin composition using an additive such as calcium stearate is excellent in heat stability with less resin burn, uneven color, color change, dust, etc., and less mesh clogging and surging phenomenon in the extruder to improve productivity. The present invention has been found to be a resin composition which is excellent and has excellent flame retardancy. In some cases, additives such as calcium stearate are added to a rubber-reinforced resin such as an ABS resin in order to improve the releasability from a mold at the time of molding. The present inventors have found that a surprising effect can be exhibited by using the above-mentioned specific additives in the process of granulating and kneading a resin, a flame retardant, and polytetrafluoroethylene powder with an extruder, and have reached the present invention. That is, the present invention provides a rubber-reinforced resin (A) 100
Parts by weight, flame retardant (B) 0.1 to 50 parts by weight, molecular weight 10
In a resin composition containing 0.01 to 1 part by weight of polytetrafluoroethylene powder (C) of 100,000 to 20 million, ethylene bisstearamide, calcium stearate, and magnesium stearate are further added as additives for kneading and granulating. At least one additive (D) selected from, zinc stearate and sodium stearate
It is a resin composition containing 0.1 to 10 parts by weight. Hereinafter, the present invention will be described in detail.

[0006] The rubber-reinforced resin (A) used in the present invention refers to a resin in which a homopolymer and a copolymer are rubber-reinforced in general, and is a vinyl resin represented by polystyrene, styrene-acrylonitrile copolymer and polymethyl methacrylate. A polymer of a compound and a copolymer with a compound copolymerizable therewith, polyethylene, polypropylene, polyoxymethylene, polyamide, polyurethane, polyester, polycarbonate, polyphenylene ether, etc. reinforced with a rubber-like polymer, and / or Alternatively, the term refers to a general blend of a homopolymer and a resin reinforced with rubber, but is preferably a graft copolymer obtained by graft-copolymerizing an aromatic vinyl compound and one or more vinyl compounds copolymerizable therewith with a rubbery polymer. It is a rubber-reinforced resin containing coalescing.

As the rubbery polymer, polybutadiene,
Conjugated diene rubbers such as polyisoprene, polychloroprene, butadiene-styrene copolymer, butadiene-acrylonitrile copolymer, ethylene-propylene rubber,
Acrylic rubbers such as ethyl acrylate and butyl acrylate are preferred, and polybutadiene-butadiene-styrene copolymer and butadiene-acrylonitrile copolymer of conjugated diene rubber are preferred. These can be used in combination of two or more.

Examples of the vinyl compound include aromatic vinyl compounds such as styrene, styrene substituted with main chain or side chain, vinyl cyanide compounds such as acrylonitrile and methacrylonitrile, and acrylic acid such as methyl acrylate, ethyl acrylate and butyl acrylate. Esters and similarly substituted methacrylic esters, acrylic acid, acrylic acids such as methacrylic acid and N-phenylmaleimide, maleimide monomers such as N-methylmaleimide,
A glycidyl group-containing monomer such as glycidyl methacrylate is also used. These can be used in combination.

The method for producing the above graft copolymer is not particularly limited, but an emulsion graft polymerization system in which a vinyl compound is graft-polymerized to a rubbery polymer latex produced by emulsion polymerization, a continuous system, a batch system, a semi-batch system Both formulas are possible.

The proportion of the component grafted to the rubbery polymer produced in the process of producing the above graft copolymer is determined by dissolving the polymer produced by the polymerization reaction in acetone and separating and removing the insoluble matter with a centrifuge. Can be measured. The components that dissolve in acetone are the components that did not undergo a graft reaction among the copolymerized polymers (non-grafted components)
Where the value obtained by subtracting the amount of the rubbery polymer from the acetone-insoluble matter is defined as the value of the graft component. The proportion of the graft component is preferably from 10 to 80 parts by weight, more preferably from 20 to 60 parts by weight, based on 100 parts by weight of the rubbery polymer.

The content of the rubbery polymer in the rubber reinforced resin (A) is preferably 5 to 50% by weight, more preferably 10 to 30% by weight. If it is less than 5% by weight, the impact resistance is poor, and if it exceeds 50% by weight, the fluidity and gloss during molding are reduced, which is not preferable.

The rubber-reinforced resin (A) of the present invention may contain a component which is formed in the course of graft copolymerization and is not grafted on the rubbery polymer.

The method for producing the rubber-reinforced resin (A) is not particularly limited. For example, a method for simultaneously producing a graft polymer and a non-graft-polymerized vinyl copolymer by emulsion polymerization, and a method for producing a rubber-like polymer by emulsion polymerization. A method of preparing a mixture of a graft polymer and a vinyl copolymer having a high degree in advance and blending it with a vinyl copolymer produced by bulk polymerization, emulsion polymerization, suspension polymerization, or the like to obtain a desired rubber content. Can be The vinyl copolymer in this case is not limited to amorphous or crystalline, but preferably contains at least one kind of the above-mentioned aromatic vinyl compound, vinyl cyanide compound, acrylate or methacrylate.

Such a rubber-reinforced resin is specifically AB
Examples include S resin, ASA resin, and AES resin.

The flame retardant (B) in the present invention is a so-called general flame retardant, and in addition to phosphorus compounds and halogen compounds, nitrogen-containing organic compounds such as melamine, inorganic compounds such as magnesium hydroxide and aluminum hydroxide. Compound, antimony oxide, bismuth oxide. Also, iron oxide, zinc oxide,
Metal oxides such as tin oxide, fibers such as carbon fiber and glass fiber, expanded graphite, silica, silica-based glass melt, and the like are preferably used, but phosphorus-based compounds or halogen-based organic compounds and halogen-based organic compounds are preferably used. A combination of a compound and antimony oxide.

Examples of the phosphorus compound include trimethyl phosphate, triethyl phosphate, tripropyl phosphate, tributyl phosphate, tripentyl phosphate, trihexyl phosphate, tricyclohexyl phosphate, triphenyl phosphate, and the like.
Tricresyl phosphate, trixylenyl phosphate, dimethylethyl phosphate, methyldibutylphosphate, ethyldipropylphosphate, phosphate esters such as hydroxyphenyldiphenylphosphate and compounds obtained by modifying these with various substituents, or red phosphorus, phosphine, Hypophosphorous acid, phosphorous acid, metaphosphoric acid,
Inorganic phosphorus compounds such as pyrophosphoric acid and phosphoric anhydride, and condensed phosphoric acid ester compounds thereof can be mentioned.

These phosphorus compounds can be used alone or
It can be used in combination of more than one kind.

The content of the phosphorus compound is determined according to the required level of flame retardancy, but is 0.1 to 50 parts by weight based on 100 parts by weight of the rubber reinforced resin.

If the amount is less than 0.1 part by weight, the required flame retardant effect is not exhibited. If it exceeds 50 parts by weight, the mechanical strength of the resin will be reduced. It is preferably 0.5 to 50 parts by weight, particularly preferably 0.5 to 15 parts by weight as a phosphorus content, and particularly 5 to 20 parts by weight in the case of a phosphate compound.

As the halogenated organic compound, for example,
Hexachloropentadiene, hexabromodiphenyl,
Octabromodiphenyl oxide, tribromophenoxymethane, decabromodiphenyl, decabromodiphenyl oxide, octabromodiphenyl oxide, tetrabromobisphenol A, tetrabromophthalimide,
There are hexabromobutene, trichlorotetrabromophenyl-triphosphate, and hexabromocyclododecane, and preferred is tetrabromobisphenol A and a brominated epoxy oligomer having a structure represented by the following general formula (1).

[0021]

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The content of the halogenated organic compound is determined according to the required level of flame retardancy, but is 0.1 to 50 parts by weight based on 100 parts by weight of the resin composition. If the amount is less than 0.1 part by weight, the required flame retardant effect is not exhibited. If it exceeds 50 parts by weight, the mechanical strength of the resin will be reduced. It is preferably from 1 to 40 parts by weight, particularly preferably from 5 to 35 parts by weight.

Further, in order to enhance the flame-retardant effect, a halogen-based organic compound and a flame-retardant auxiliary can be used in combination as the flame retardant (B). Preferably, the flame retardant auxiliary is a compound and / or oxide containing an element belonging to VB in the periodic table of the elements, specifically, a nitrogen-containing compound, a phosphorus-containing compound, antimony oxide, and bismuth oxide.
Further, metal oxides such as iron oxide, zinc oxide and tin oxide are also effective. Of these, antimony oxide is particularly preferable, and specific examples thereof include antimony trioxide and antimony pentoxide. These flame-retardant aids may be those which have been subjected to a surface treatment for the purpose of improving dispersion in the resin and / or improving the thermal stability of the resin.

When the halogen-based organic compound and the above-mentioned flame retardant are used together, the content of the flame retardant in the flame retardant (B) is preferably from 1 to 40% by weight, particularly preferably
The content of the flame retardant (B) is preferably 5 to 4% by weight based on 100 parts by weight of the rubber reinforced resin.
0 parts by weight, particularly preferably 10 to 35 parts by weight.

The properties of the polytetrafluoroethylene powder (C) in the present invention are powders.
It is not an aqueous dispersion described in JP-A-18979. The molecular weight of polytetrafluoroethylene powder is 1
It is between 100,000 and 20 million. When the molecular weight exceeds 20,000,000, the dispersibility of the polytetrafluoroethylene powder in the resin decreases, and the flame retardancy and mechanical strength decrease. If the molecular weight is less than 1,000,000, the effect of preventing dripping of the resin during combustion is insufficient, and a large amount of polytetrafluoroethylene powder must be added, resulting in insufficient mechanical properties of the resin. Preferably 1,000,000 ~
It is 10,000,000, particularly preferably 2,000,000 to 6,000,000.

The content of the polytetrafluoroethylene powder is based on 100 parts by weight of the rubber reinforced resin (A).
It is 0.01 to 1 part by weight. If the amount is less than 0.01 part by weight, the flame retardancy is not sufficient, and if the amount exceeds 1 part by weight, the impact resistance and the appearance such as the gloss are reduced. Preferably it is 0.05 to 0.5 part by weight, particularly preferably 0.1 to 0.3 part by weight. The molecular weight of the polytetrafluoroethylene powder in the present invention refers to Journal of Applied Polymer Science Vol.
It is a value calculated by the DSC method described on page 253 (1973) according to the following formula.

Mn = 2.1 × 10 ¹⁰ ΔHc ~ ^5.16 (wherein Mn is the number average molecular weight, ΔHc is the heat of crystallization and the unit is cal / g.) The method for producing polytetrafluoroethylene powder is not particularly limited. Although not performed, usual emulsion polymerization and suspension polymerization can be used.

The additive for kneading and granulating in the present invention, that is, the additive (D) used in the kneading and granulating process is ethylene bis-stearamide, calcium stearate, magnesium stearate, zinc stearate and sodium stearate. At least one selected from These can be used alone or in combination. Preferably, calcium stearate and ethylene bis stearoamide are used. The amount of the additive (D) used is 0.
It is 1 to 10 parts by weight. If it is less than 0.1, surging or mesh clogging occurs during extrusion, resulting in poor productivity. When the amount exceeds 10 parts by weight, the heat resistance of the resin is reduced. It is preferably 0.1 to 5 parts by weight, particularly preferably 0.2 to 2 parts by weight.

The additive (D) must be used in the step of granulating and kneading the rubber-reinforced resin (A), the flame retardant (B), and the polytetrafluoroethylene powder (C) with an extruder, particularly in the step of blending. is there. Rubber reinforced resin (A)
In the case where the additive (D) is not used in the above-mentioned granulation step in the step of producing the rubber, the blocking of the rubber reinforced resin and the flame retardant in the extruder hopper and the feed pipe by the fiberization of polytetrafluoroethylene powder. In addition to the occurrence of cracking, surging, mesh clogging, and vent-up occur, resulting in insufficient productivity. Preferably, polytetrafluoroethylene powder (C) and additive (D)
Is preliminarily mixed, blended with the rubber reinforced resin (A) and the flame retardant (B), and kneaded and granulated by an extruder. More preferably, the polytetrafluoroethylene powder (C) and the additive (D) are used. Is preliminarily mixed by controlling the temperature within the range of -30 to 30 ° C. Particularly preferably, the temperature of the polytetrafluoroethylene powder (C) and the additive (D) is controlled within the range of -20 to 10 ° C. In this case. In this case, the rate of occurrence of surging and mesh clogging at the time of extrusion is reduced, and productivity is greatly improved. The method of premixing is not particularly limited,
For example, a method using a pulverizer using a Henschel mixer, a jet mill, a roller mill, a pole mill, a spike mill, a vibration mill, or the like, a method using hand shake, and the like can be given.

For the purpose of modifying the resin, the resin composition of the present invention may contain, if necessary, ordinary additives such as a lubricant, an antistatic agent, an antioxidant, an ultraviolet absorber, a colorant,
Titanium oxide, a surface modifier, a dispersant, a plasticizer, a stabilizer and the like can be added.

Although the use of the resin composition of the present invention is not particularly limited, for example, automobile parts, OA equipment housing parts,
It can be used as a material for injection molding used in the fields of electric appliances, furniture and the like.

[0032]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to examples.

(Hereinafter, “parts” means “parts by weight”.) (Rubber reinforced resin A-1) 15% by weight of butadiene component,
60% by weight of styrene component, 2% of acrylonitrile component
ABS resin (acrylonitrile-butadiene-styrene resin) consisting of 5% by weight.

(Rubber Reinforced Resin A-2) Steer is based on 100 parts by weight of an ABS resin (acrylonitrile-butadiene-styrene resin) composed of 15% by weight of a butadiene component, 60% by weight of a styrene component, and 25% by weight of an acrylonitrile component. Extruded and granulated rubber reinforced resin containing 0.5 parts of calcium phosphate.

(Flame Retardant B) B-1: Both ends R and R 'in the formula (1) are both non-blocked brominated epoxy oligomers of the formula (2) (softening point: 100 ° C.) B-2: Tetra Bromobisphenol A B-3: Antimony trioxide (Polytetrafluoroethylene powder C) Polytetrafluoroethylene powder having a molecular weight of 3,000,000 (Additive D) D-1: Calcium stearate D-2: Ethylene bisstearamide Example 1 100 parts of rubber reinforced resin (A-1), flame retardant (B-1) 2
4 parts, flame retardant (B-3) 6 parts, polytetrafluoroethylene powder (C) 0.15 part, additive (D-1) 0.
4 parts are blended with a drum blender and the screw diameter is 7
The mixture was fed into a 5 mmφ same-direction twin-screw extruder at a time and kneaded and granulated. At this time, a screen mesh of 50, 150, 50 mesh was mounted between the extruder tip and the die in order from the die side. Extruder cylinder temperature is 2
At 20 ° C., the discharge rate was 300 kg per hour.

During the operation, some surging and venting occurred, and the screen mesh was replaced once every 6 hours.

Example 2 100 parts of rubber reinforced resin (A-1), flame retardant (B-1) 2
4 parts, flame retardant (B-3) 6 parts, polytetrafluoroethylene powder (C) 0.15 part, additive (D-1) 0.
Example 1 except that 3 parts and 0.5 part of the additive (D-2) were used.
The same was done.

Some surging and venting occurred during operation, and the screen mesh was replaced once every 6 hours.

Example 3 100 parts of rubber reinforced resin (A-2), flame retardant (B-1) 2
4 parts, flame retardant (B-3) 6 parts, polytetrafluoroethylene powder (C) 0.15 part, additive (D-1) 0.
The procedure was performed in the same manner as in Example 1 except that four parts were used.

During the operation, slight surging and venting occurred, and the screen mesh was replaced once every 6 hours.

Example 4 100 parts of rubber reinforced resin (A-1), flame retardant (B-2) 2
0 parts, 4 parts of flame retardant (B-3), 0.01 parts of polytetrafluoroethylene powder (C), 0.1 part of additive (D-1).
Example 1 except that 3 parts and 0.5 part of the additive (D-2) were used.
The same was done.

During the operation, some surging and venting occurred, and the screen mesh was replaced once every 6 hours.

Example 5 Polytetrafluoroethylene powder (C) 0.15
Part, additive (D-1) 0.3 part, additive (D-2) 0.
Except that 5 parts were premixed with a Hensyl mixer and then mixed with 100 parts of a rubber reinforced resin (A-1), 24 parts of a flame retardant (B-1), and 6 parts of a flame retardant (B-3) by a drum blender. Was performed in the same manner as in Example 1.

During the operation, there was almost no surging or venting, and continuous operation was possible for 8 hours without replacing the screen mesh.

Example 6 Polytetrafluoroethylene powder (C) 0.15
Part, additive (D-1) 0.3 part, additive (D-2) 0.
5 parts was adjusted to 8 ° C. and preliminarily mixed with a Hensyl mixer, and then a rubber reinforced resin (A-
1) 100 parts, flame retardant (B-1) 24 parts, flame retardant (B-
3) The same operation as in Example 1 was performed except that the mixture was mixed with 6 parts.

During the operation, there was no surging and no venting, and continuous operation for 10 hours was possible without replacing the screen mesh.

Comparative Example 1 100 parts of rubber reinforced resin (A-2), flame retardant (B-1) 2
Example 1 was repeated except that 4 parts, 6 parts of the flame retardant (B-3) and 0.15 parts of polytetrafluoroethylene powder (C) were used.

During the operation, surging and venting occurred, the strand became unstable, and the screen mesh was replaced once every two hours.

Comparative Example 2 100 parts of rubber reinforced resin (A-1), flame retardant (B-1) 2
Example 1 was repeated except that 4 parts, 6 parts of the flame retardant (B-3) and 4 parts of chlorinated polyethylene were used.

There was no surging or venting during operation, and the screen mesh was replaced once every 6 hours.

For each of the granulated samples, Table 1 shows the results of enhancement of dust, burn during molding, color change, and flame retardancy.

(Evaluation of dust)
A flat plate having a thickness of 1 mm and a diameter of 15 cm was prepared by compression molding at ℃, and the number of black spots observable on the flat plate was counted. The larger the number of black spots, the more dust generated during extrusion.

(Evaluation of Flame Retardancy) Test pieces were prepared from the granulated pellets using an injection molding machine having a cylinder temperature of 220 ° C. The flame retardancy test is a UL94 standard vertical combustion test (thickness 1 /
12 inches), those having a value of V-0 or less were evaluated as x. Also, UL94 standard 5V test (1/10 inch)
Was evaluated as OK, and reject was evaluated as NG.

(Evaluation of Burn) The granulated pellets were stayed in an injection molding machine at a cylinder temperature of 260 ° C. for 10 minutes and then molded. The molded product of the second shot was visually judged for the state of burn and passed. 、, failure is indicated by ×.

(Evaluation of Color Change) The granulated pellets were formed by changing the cylinder temperature. Cylinder temperature is 22
The color difference (ΔE) between 0 ° C. and 260 ° C. was measured with a color computer. The larger the value, the greater the color change due to the molding temperature.

[0056]

[Table 1]

[0057]

EFFECT OF THE INVENTION The resin composition of the present invention is excellent in heat stability with less resin burn, color change, dust and the like, less in mesh clogging and surging in an extruder, excellent in productivity, and excellent in flame retardancy. .

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI C08K 5/49 C08K 5/49 // (C08L 51/04 27:18)

Claims (8)

[Claims] 1. 100 parts by weight of a rubber-reinforced resin (A), 0.1 to 50 parts by weight of a flame retardant (B), and a molecular weight of 1 to 200.
100,000 polytetrafluoroethylene powder (C)
In the resin composition containing from 0.01 to 1 part by weight, as an additive for kneading and granulating, at least one additive selected from ethylene bisstearamide and calcium stearate, magnesium stearate, zinc stearate, and sodium stearate. (D) A resin composition comprising 0.1 to 10 parts by weight. 2. The rubber-reinforced resin (A) is a rubber-reinforced resin comprising a rubber-like polymer and an aromatic vinyl compound and a graft copolymer obtained by graft-copolymerizing one or more vinyl compounds copolymerizable therewith. The resin composition according to claim 1, wherein 3. The flame retardant (B) is a halogen-based organic compound and / or a phosphorus-based compound.
The resin composition as described in the above. 4. The resin composition according to claim 1, wherein the flame retardant (B) is a halogen-based organic compound and an antimony oxide. 5. The flame retardant (B) is a halogenated organic compound and an antimony oxide, and the halogenated organic compound is a brominated epoxy oligomer and / or tetrabromobisphenol A or antimony oxide is an antimony trioxide. Or, it is antimony pentoxide and the proportion of antimony oxide in the flame retardant (B) is 1 to 4
3. The resin composition according to claim 1, which is 0% by weight. 6. The resin composition according to claim 1, wherein the additive (D) is ethylene bis stearamide and / or calcium stearate. 7. The resin composition according to claim 1, wherein the additive (D) is premixed with the polytetrafluoroethylene powder (C). 8. The method according to claim 1, wherein the additive (D) is preliminarily mixed with the polytetrafluoroethylene powder (C) by adjusting the temperature within a range of -30 to 30 ° C.
7. The resin composition according to any one of 6.