JPS6343964A - Inorganic powder having modified surface a resin composition containing the same - Google Patents

Abstract

PURPOSE:To provide a resin compsn. having excellent dispersibility, mechanical strength, electrical conductivity, magnetizability, flame retardance, etc., consisting of a resin and a specified inorg. powder having a modified surface. CONSTITUTION:A suspension obtd. by suspending inorg. powder having a particle size of 0.1-100mum (e.g., SiO2) in an equal volume or excees of an org. solvent (e.g., benzene) is mixed with 0.01-20wt% phosphorus-contg. silicon compd. of formula I [wherein R<1> and R<2> are each 1 1-18C alkyl, a (substd.) alkyl or a (substd.) aryl; Q is NH2 or a group of formula II, III or IV; R<3> is a 1-4C alkyl; l is 0-2; and a is 0 or 1]. The mixture is heated under reflux with stirring. The solid is separated from the liquid and dried under reduced pressure to obtain a surface-modified inorg. powder (B). A thermoplastic or thermosetting resin (1A) is blended with the component B.

Description

[Detailed description of the invention] (Industrial application field) The present invention is treated with a phosphorous-containing silicon compound.

Surface-modified inorganic powder with excellent dispersibility in various resins.

and a resin composition containing the powder.

(Conventional technology) Strengthening various resins, improving rigidity, and improving thermal conductivity.

It is widely practiced to blend inorganic powder into the resin for the purpose of imparting conductivity, magnetism, flame retardance, and increasing the amount of resin. However, when inorganic powder is blended into a resin, the moldability of the resin deteriorates, so the amount of inorganic powder added is limited; (flammability, conductivity, magnetism) are insufficient;
There are drawbacks such as: (1) strength decreases due to non-uniform dispersion of inorganic powder;

Silane coupling agents are used to suppress a decrease in the mechanical strength of resin molded products that contain inorganic powder or inorganic fibers. For example, when asbestos fibers or glass fibers are treated with a silane coupling agent, the silane coupling agent chemically bonds to the surface of these fibers, resulting in increased adhesion when the fibers and resin are mixed, making it easier to use a machine. The target strength is improved. However, even if the silane coupling treatment is performed, the filling property (easiness of mixing) and dispersibility of the inorganic powder (including inorganic fibers) into the resin is hardly improved. Long chain fatty acids and their salts are used as lubricants to improve processability (facilitate operation) when mixing inorganic powder into resin.
Although titanium coupling agents are used for the purpose of increasing processability and improving the dispersibility of inorganic powder, none of them can be said to have sufficient dispersibility of inorganic powder. JP-A-57-1
No. 68954 discloses an organic phosphoric acid compound as a treatment agent for such an inorganic powder.

This has the function of sufficiently increasing the dispersibility in the resin when the inorganic powder is calcium carbonate. However, if this is applied to inorganic powders other than calcium carbonate, the inorganic powders will agglomerate because there are two acidic OHi molecules in each molecule. As a result of the presence of free 0* groups on the surface of the inorganic powder, when mixed with a resin, gelation occurs and the resin deteriorates. Furthermore, when blended with thermosetting resins such as unsaturated polyesters and epoxy resins, a thickening phenomenon occurs and processing becomes difficult.

In this way, when blended with resin, it has sufficient dispersibility and the mechanical strength of the inorganic powder blended resin composition.

At present, inorganic powders that can sufficiently ensure required properties such as conductivity, magnetism, and flame retardance have not been obtained.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional drawbacks, and its purpose is to have sufficient affinity with various resins and when mixed in the resins. An object of the present invention is to provide an inorganic powder that has good dispersibility and can sufficiently impart necessary functions such as conductivity and magnetism without reducing the mechanical strength of the resin. Another object of the present invention is to provide a surface-modified inorganic powder whose surface is treated with a suitable treatment agent to improve its dispersibility in a resin. Still another object of the present invention is to provide a resin composition containing the above surface-modified inorganic powder.

(Means for Solving the Problems) The surface-modified inorganic powder of the present invention is obtained by surface-treating an inorganic powder with a phosphorus-containing silicon compound (I) represented by the following formula, thereby achieving the above-mentioned objectives. is achieved. Furthermore, the resin composition of the present invention contains a surface-modified inorganic powder obtained by surface-treating an inorganic powder with a phosphorus-containing silicon compound (1) represented by the following formula, and a resin, thereby achieving the above object. Achieved: where R1 and R2 are each independently.

C1-C18 alkyl group, aryl group.

selected from the group consisting of substituted alkyl groups, and substituent groups; Q is or -C112CIl□-CO-, R3 is an alkyl group having 1 to 4 carbon atoms; l is 0.1 or 2 and a is 0 or 1.

The phosphorus-containing silicon compound used in the present invention is represented by the above formula (I). These include first, for example, second order compounds.

(CJsO) 2P -NH(C1l□)xsi (O
Czlls) x (CzlltO) tP -Nil
(CHz) sSi (OCzlls) x (C41
1tO) zP NH(CIIz) ssi (OC
zlls) 3(CJ+tO)zr' NH(CHz
hSi(OCzllsh(C611SO) zP N
il (Cllz) sSi (OCzlls) 3
(C211SO) zp -Nll-(CIl□)t
NH(Clh)isi(0(413)3(CJJ)
zP -Nll-(C1l□)z Ni1(CHz)
zsi (OCRs) 3 (C41190) 2P
Nll (C1l□)z Ni1(C1l□)+
Si (OCII:+) :1(CIlIIl?0)Z
P Ntl (CH2)2 N1((C1l□h
Si(OCHx)z(C611sO)zP Nil
(C1h) t Nll (Cal□)3Si
(OCH3) zI (Cm)l l? ) 2P NH(C1l□)t-
NH(CII2)sSi(OCHz)3(C@H+?
O) zP (CHz) 1si(OCII3) 3
(L;+tlhsOJzPClhC1l-GO(CHz
) zsi (OCIh)
Class II is not particularly limited. A material is used that can impart necessary properties such as conductivity, magnetism, and flame retardancy to the resin into which the inorganic powder is to be blended. Examples include silicon dioxide (silica, quartz, white carbon, etc.), aluminum hydroxide, magnesium hydroxide, titanium oxide, magnesium oxide, alumina, antimony dioxide, iron oxide,
Ferrite.

Magnesium sulfate, calcium carbonate, clay, talc,
Examples include asbestos mica, various metals, and glass. The particle size of the inorganic powder varies depending on its purpose, but is usually 0.1 to 9.
It is 100 μm. Even if the inorganic powder is in the form of fibers, the diameter and fiber length are not particularly limited;
0-100 pm and in-person ~3 cm.

The resin used in the resin composition of the present invention is also not particularly limited. Thermoplastic resins, thermosetting resins, and rubber resins can be used depending on the purpose. Examples include alkyd resins, various natural fibers, epoxy resins, polyamide resins, thermoplastic polyesters.

Polycarbonate, polyethylene, polybutylene.

Polystyrene, styrene-butadiene copolymer.

Polypropylene, styrene-propylene copolymer.

Silicone resin, silicone rubber, SBR rubber, nitrile rubber, natural rubber, acrylic resin, phenolic resin,
Polyoxymethylene, polyurethane, polysulfone, polysulfide rubber, nitrocellulose, ethylcellulose, vinyl resins (e.g. EVA).

Polyvinyl butyrate (vinyl chloride, vinyl acetate-containing polymers), cellulose acetate, cellulose monobutyrate.

Examples include viscose rayon, wax, and ethylene copolymers (eg, ethylene-vinyl acetate copolymers, ethylene-acrylic acid copolymers, and ethylene-acrylic acid ester copolymers).

The surface-modified inorganic powder of the present invention can be obtained by treating the inorganic powder with the phosphorus-containing silicon compound by a wet treatment method or a dry treatment method. In the wet processing method9, for example, first,
The above inorganic powder is suspended in the same volume or more of an organic solvent. Normal as an organic solvent.

Alcohol, benzene, toluene, xylene, etc. are used. A phosphorous-containing silicon compound is added to this slurry-like suspension and thoroughly stirred. The phosphorus-containing silicon compound is 0.01 to 20% by weight, preferably 0.1 to 5% by weight based on the inorganic powder.
It is added in a proportion of % by weight. If the amount is too small, the effect of dispersing the inorganic powder in the resin composition cannot be obtained, and even if it is in excess, the effect proportional to the content cannot be obtained, which is wasteful. After the suspension is thoroughly stirred, the temperature of the suspension is raised, and the mixture is heated to reflux while being stirred. Next, solid-liquid separation is performed, and the cake-like powder is taken out and dried. To thoroughly remove the solvent.

Drying under reduced pressure is recommended. Adoption of such a wet treatment method has the advantage that the surfaces of each particle are uniformly treated.

In the dry processing method, for example, first, a powder mixer capable of high-speed stirring and heating of inorganic powder (for example, Henschel type powder mixer n
), and a phosphorus-containing silicon compound dissolved in an appropriate amount of solvent is added thereto using a spray nozzle or the like under high-speed stirring. The amount of the phosphorous-containing silicon compound added is the same as in the case of the wet processing method described above.

After thoroughly mixing with a powder mixer, the temperature is raised and the solvent is removed. This dry processing method does not use large amounts of solvents,
It has the advantage of being cost-effective because the device is simple and processing can be done in a short time. There is almost no difference in the processing effect of the powder whether the powder is processed using the wet processing method or the dry processing method. An appropriate treatment method is selected depending on the type and shape of the inorganic powder.

(effect) The surface-modified inorganic powder obtained in this way is.

It is blended into various resins. For example, barium ferrite powder that has been surface-treated to impart magnetism is blended with glass fibers that have been surface-treated to improve the a-mechanical strength of the resin. A surface-treated α-iron oxide powder is blended into the magnetic paint. What is the blending amount?

It varies depending on the type of inorganic powder and its purpose.

This is based on the conventional example.

In the surface-modified inorganic powder of the present invention, the -Si (OR') are connected to each other. When this surface-modified inorganic powder is mixed into a resin, the phosphate ester portion of the phosphorus-containing silicon compound is associatively bonded to the resin. This point differs from the mechanism in which conventional silane coupling agents have vinyl groups, amino groups, methacryloxy groups, etc., and these groups are covalently bonded to the resin. The associative bonding of the phosphate ester moiety with the resin means that the affinity between the phosphorus-containing silicon compound and the resin, that is, the affinity between the surface-modified inorganic powder and the resin is improved. Furthermore, the phosphorus-containing silicon compound also has a function as a plasticizer. the result.

The surface-modified inorganic powder can be uniformly dispersed in the resin.

A resin composition containing surface-modified inorganic powder.

For example, injection molding, transfer molding, compression molding.

It can be molded into the desired shape using cast molding, etc.

Used as a paint. In this way, the resin composition containing the surface-modified inorganic powder of the present invention has properties such as electroconductivity, magnetism, flame retardancy, etc. because the inorganic powder is uniformly dispersed therein. The resin has excellent performance as desired, and the mechanical strength of the resin does not decrease due to the mixing of the surface-modified inorganic powder.

(Example) The invention will be explained below with reference to examples.

(A) Preparation of surface-modified inorganic powder: 100 weight of aluminum hydroxide powder (manufactured by Nippon Light Metal Co., Ltd., B-103) with a particle size of 3 μm was added as an inorganic powder to a Henschel type powder mixer. I have prepared a section. The following phosphorus-containing silicon compound 0 was added to this under high-speed stirring.
．． A solution of 5 parts by weight of isopropanol was sprayed.

OClll0 ill l :1 (Call l 7) 2P CI□-CIl C
O(CHz)ssi(OClh)s After further stirring for 1 hour, the mixture was heated to 120°C to substantially remove isopropanol and obtain a surface-modified thermomechanical powder.

(B) Performance evaluation of surface-modified inorganic powder = Prepare a mixture containing the surface-modified inorganic powder obtained in section (8) in the following ratio, and measure its viscosity at 25°C using a B-type viscometer ( The measurement was carried out using a rotor shaft 3). Viscosity is 11, 700cp
It was s.

Star gold side hill vinyl chloride resin (Zeon 121) 150 parts by weight DOP 90 parts by weight Liquid zinc stabilizer (KF80A-8 manufactured by Kyodo Yakuhin Co., Ltd.) 5 parts by weight Surface-modified aluminum hydroxide powder (prepared in section @) 60 Example 1- with the amount of phosphorus-containing silicon compound being 1.0 parts by weight
Surface-modified inorganic powder was prepared according to Section H^). A mixture was prepared in the same manner as in Example 1-1(B), and its viscosity was measured to be 9800 cps.

1. When a mixture was prepared in which a homogeneous aluminum hydroxide powder without surface treatment was mixed in place of the surface-modified inorganic powder of Example 1-1, the viscosity of the mixture was measured.15.
It was 700 cps.

Example 1-1.1-2 and Comparative Examples 1 to 9 When the surface-modified inorganic powder of the present invention is blended into a resin, the viscosity decreases significantly compared to when a surface-untreated thermomechanical powder is used. It can be seen that operations such as molding can be easily performed.

Alumina powder (manufactured by Nippon Light Metal Co., Ltd.; A-34) 100
Part by weight was treated according to Example 1 (A) using 0.5 part by weight of the following phosphorous-containing silicon compound to obtain 1 surface-modified thermomechanical powder: Obtained surface-modified inorganic powder 100 Parts by weight and curing agent (
24 parts by weight of Ebicure 126) manufactured by Yuka Shell Co., Ltd. were added, and the mixture was defoamed and mixed for 20 minutes under reduced pressure. The viscosity of this mixture was measured according to Example 1 (B) and was 1200.
It was cps. This mixture was allowed to stand for 5 days, but no sedimentation occurred.

Senniwa charcoal 1'' A surface-modified inorganic powder was prepared in the same manner as in Example 2-1 except that the amount of the phosphorous-containing silicon compound was 1.0 parts by weight. A similar mixture was prepared using this surface-modified inorganic powder in place of the surface-modified inorganic powder of Example 2-1, and its viscosity was measured to be 720 cps. Add this mixture to 5
Although it was left to stand for several days, no sedimentation occurred.

A mixture was prepared according to Example 1-1 using a homogeneous alumina powder (manufactured by Nippon Light Metal Co., Ltd.; ^-34) without surface treatment instead of this fil raw material surface-modified inorganic powder. . The viscosity was measured and found to be 15.500 cps. When this mixture was left to stand for 5 days, sedimentation of solid components occurred.

From Example 2-1.2-2 and Comparative Example 2, when the inorganic powder subjected to the surface treatment of the present invention is blended into the resin, the viscosity is lower than when the surface-untreated inorganic powder is used. can be,
It is also clear that it can be stored stably without sedimentation.

Preparation of surface-modified inorganic powder (A): Aluminum hydroxide powder (manufactured by Showa Light Metal Co., Ltd.; 32) in a high-speed mixer 10
0 parts by weight was charged, and 5 parts by weight of a 10% methanol solution of the following phosphorus-containing silicon compound was added thereto.

High speed stirring was performed for 30 minutes: Raise the temperature to 120°C to remove methanol and dry.

A surface-modified inorganic powder was obtained.

(B) Performance evaluation of surface-modified inorganic powder: 9 parts per 100 parts by weight of unsaturated polyester (manufactured by Nippon Shokubai Kagaku Co., Ltd.; S-355LT) 140 parts of the surface-modified inorganic powder obtained in Example (A) Parts by weight were added as filler. The viscosity of this mixture was measured according to Example 1 (B).

Two sets of similar mixtures were prepared, 15 parts by weight and 25 parts by weight of styrene were added, respectively, and the viscosity of each was measured. The results are shown in Table 1. Comparative Examples 3-1 and 3-
The results of No. 2 are also shown in Table 1.

Example 3 A mixture was prepared according to Example 3 using homogeneous aluminum hydroxide powder without surface treatment in place of the surface-modified inorganic powder obtained in Section (A). and its viscosity was measured.

(Left below) Except for using Kono 13u C1□1lzs 0P(OH)z,
This is the same as in Example 3.

Table 1 140 parts by weight of the surface-modified inorganic powder obtained in Example 3 (A) and unsaturated polyester (manufactured by Nippon Shokubai Kagaku Co., Ltd.; S-3
55LT) were mixed uniformly with 100 parts, and a glass mat (#150) was impregnated with this. After laminating three such impregnated glass mats and lightly compressing them, 110
After-curing was performed at ℃ for 2 hours to prepare a molded article. Four such molded bodies were prepared, and one of the molded bodies was used to measure the 1-bending strength retention rate using the JIS-6911 method.

The remaining three sheets were stored at 70°C for 20 hours.

After 40 hours and 80 hours, each piece was taken out and measured in the same manner. The bending strength immediately after forming is 100
%, and the percentage of bending strength after 20 hours, 40 hours, and 80 hours was calculated. The results are shown in Table 2. The results of Comparative Examples 4-1 and 4-2 are also shown in Table 2.

Comparison ■ (U) A molded body was produced according to Example 4, using a homogeneous aluminum hydroxide powder without surface treatment in place of the surface-modified inorganic powder obtained in Example 3 (8). 9 bending strengths were measured.

A surface-modified inorganic powder was prepared using C+zflzs 0P(OH)z. Using this, a molded body was prepared according to Example 4, and the 2-bending strength was measured.

Table 2 (^) Preparation of surface-modified inorganic powder; Aluminum hydroxide powder (manufactured by Nippon Light Metal Co., Ltd.; B2O2) 1 in a high-speed mixer
00 parts by weight were charged. While stirring at high speed.

1 part by weight of the following phosphorus-containing silicon compound was added to this and thoroughly mixed.

(CzHsO) zP-NH-(CHz) zsi (
OCzHs) 3 This was heated to 130°C and dried for 1 hour to obtain 1 surface-modified inorganic powder.

CB) Performance evaluation of resin molded product containing surface-modified inorganic powder: Ethylene-vinyl acetate copolymer resin (manufactured by Mitsui Polychemical Co., Ltd.; Evaflex r'-2805) 100 parts by weight 8
120 parts by weight of the surface-modified inorganic powder obtained in Example (A), antioxidant (manufactured by Iruuchi Shinko Co., Ltd.; Tsukurak 300)
75 parts by weight of 1.3 parts by weight and 2.6 parts by weight of stearic acid.
Knead for 30 minutes with a kneading roll at 100°C 2100k
Press molding was performed under the conditions of g/cj. The tensile strength of this molded body was determined using the soft vinyl chloride test method (JISK-67).
23). The results are shown in Table 3. Table 3
, 100% modella means 100% of the test piece.
Tensile force (kg) per unit area (Ryu 2) during elongation
). The results of Examples 5-2 to 5-4 and Comparative Example 5 are also shown in Table 3.

Practical Plate Crafts'' This was the same as Example S-t except that the following compound was used as the phosphorus-containing silicon compound.

(C41190) zP-Nll-(CHri JH(C
1l□) : IS i (QC) 13) s Actual Twisting Work The same as Example 5-1 except that the following compound was used as the phosphorus-containing silicon compound.

(CJsO) zP-Nl(-(CHz) zNH(C
Il□)isi (OCII:l) 3 Uraage 與】" The same as Example 5-1 except that the following compound was used as the phosphorus-containing silicon compound.

A molded body was prepared according to Example 5-1 using a homogeneous aluminum hydroxide powder without surface treatment in place of the surface-modified inorganic powder. This molded article was evaluated in the same manner as Comparative Example 5-1.

(Leaving space below) Table 3 From Table 3, 1 molded product obtained using the composition containing the surface-modified inorganic powder of the present invention is 1 molded product obtained using the composition containing the surface-untreated inorganic powder. It is clear that both tensile strength and elongation are superior to that of the body.

(A) Preparation of surface-modified inorganic powder: γ-
100 parts by weight of Fe, O, powder and 500 parts by weight of toluene were placed in a homo mixer (manufactured by Tokushu Kikai Kogyo Co., Ltd.), and 2 parts by weight of the following phosphorus-containing silicon compound were added thereto and stirred for 1 hour.

This was filtered to remove the solvent and dried at 100° C. for 1 hour to obtain a surface-modified inorganic powder.

(B) Performance evaluation of magnetic recording media containing surface-modified inorganic powder A magnetic paint was prepared using the following recipe.

Magnetic material mixing ratio: 100 parts by weight of the surface-modified inorganic powder obtained in section (A) 15 parts by weight of vinyl chloride-vinyl acetate copolymer Dioctyl phthalate 5 parts by weight Toluene
122 parts by weight methyl ethyl ketone
110 parts by weight of this magnetic paint was applied to a polyester film.

A magnetic recording medium was obtained by orientation and drying. The coercive force (llc) and degree of orientation of this magnetic recording medium were measured.

Next, the output at 10 KIIz was measured, and this was used as a reference (OdB) for comparison with Example 6-1 and Comparative Example 6, which will be described later. The results are shown in Table 4. Said 10
A comparison of the output in Ilz is described in the "Electrical Characteristics" section. The results of Example 6-2 and Comparative Example 6 are also shown in Table 4.

Same as Example 6-1 except that the following compound was used as the phosphorus-containing silicon compound.

o C1h O II I II (Cell+tO) 2P -C1lz -CIl-C
O(C11□)+5i(OCIIi) z upper calibration i Instead of surface-modified inorganic powder, homogeneous γ-Fe20. without surface treatment. A magnetic paint was prepared using powder, and the performance of the obtained magnetic medium was evaluated.

(The following are blank spaces) Tables 4 to 9 Magnetic recording media using compositions containing the surface-modified inorganic powder of the present invention have higher coercive force than conventional magnetic recording media, and are necessary as magnetic recording media. It can be seen that the output in the high frequency region is as high as 5 to 6 dB.

(A) Preparation of surface-modified inorganic powder: 100 parts by weight of anisotropic barium ferrite powder (particle size 1.2 μm) was stirred at low speed with a Henshil mixer, and the following phosphorus-containing silicon was added to it. Compound 0
．． A methanol solution in which 5 parts by weight were dissolved in 3 times the amount of methanol was gradually added dropwise and mixed over 5 minutes.

(CsHI 70) 2P-NH-(CH2) 2-N
11 (C112) zsi (OCR:l): 1 This was further stirred at high speed for 1 hour, during which time the temperature was raised slowly and the solvent was removed to obtain a surface-modified inorganic powder.

(B) Performance evaluation of plastic magnets containing surface-modified inorganic powder 85 parts by weight of the surface-modified inorganic powder (surface-modified anisotropic barium ferrite) obtained in Section 2(^), and nylon 6. Load into a 15-layer extruder.

The mixture was kneaded and pelletized. The pellets were placed in an injection molding machine equipped with a magnetic field generator, and at the same time as the cavity was filled, a coil magnetic field of 15,000 Gauss was applied for metered magnetization. The test results for this test piece (plastic magnet) are shown in Table 5. Examples 7-2 to 7-3. Table 5 also shows the results of Comparative Examples 7-1 and 7-2.

Big Finger Opening 1" The same as Example 7-1 except that the following compound was used as the phosphorus-containing silicon compound.

(C4H90) zP-NH-(CHz) ssi (
OC2H5) 3 disasters 1'' Same as Example 7-1 except that the following compound was used as the phosphorus-containing silicon compound.

Example 1 except that 0.5 parts by weight of a conventional titanium coupling agent (manufactured by Ajinomoto Co., Ltd., TTS) was used instead of the phosphorus-containing silicon compound of the present invention. -1 is the same.

"This μm 1L" is made of plastic using homogeneous anisotropic barium ferrite powder without surface treatment instead of surface-modified inorganic powder! Is this an example except that 8 stones were prepared? -1 is the same.

(Left below) From Table 5, plastic magnets using the surface-modified inorganic powder of the present invention have a higher residual magnetic flux than plastic magnets containing inorganic powder that has been treated with a conventional surface treatment agent or whose surface has not been treated. Density, coercive force.

It can be seen that the maximum energy product and orientation are excellent. In addition to these magnetic properties, fJi
? It is clear that it is also excellent in J1 strength and tensile strength.

(Effects of the Invention) According to the present invention, a surface-modified inorganic powder having excellent dispersibility in various resins and a resin composition containing the same can be obtained. Since the surface-modified inorganic powder of the present invention is uniformly dispersed in the resin, it does not reduce the mechanical strength of the resin composition, and also has the necessary properties such as conductivity, magnetism, and flame retardancy. The corresponding effect can be sufficiently imparted. Such surface-modified inorganic powders and resin compositions containing the same can be effectively used in various products such as reinforced plastic composite products, flame retardants, plastic magnets, and magnetic recording media.

Claims (1)

[Claims] 1. The inorganic powder is a phosphorous-containing silicon compound represented by the following formula (
Surface-modified inorganic powder obtained by surface treatment by I): ▲
There are mathematical formulas, chemical formulas, tables, etc. ▼ (I) Here, R^1 and R^2 are each independently an alkyl group, an aryl group, a substituted alkyl group, and a substituted aryl group having 1 to 18 carbon atoms. selected from the group; Q is −
NH-, -NH(CH_2)_2NH-, ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ or ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼; R^3 is an alkyl group with 1 to 4 carbon atoms; l
is 0, 1 or 2; and a is 0 or 1. 2. Inorganic powder is converted into a phosphorous-containing silicon compound represented by the following formula (
Composition containing surface-modified inorganic powder and resin obtained by surface treatment by I): ▲There are mathematical formulas, chemical formulas, tables, etc.▼(I) Here, R^1 and R^2 are each independently , an alkyl group having 1 to 18 carbon atoms, an aryl group, a substituted alkyl group,
and a substituted aryl group; Q is -N
H-, -NH(CH_2)_2NH-, ▲There are mathematical formulas, chemical formulas, tables, etc.▼ or ▲There are mathematical formulas, chemical formulas, tables, etc.▼; R^3 is an alkyl group with 1 to 4 carbon atoms; l
is 0, 1 or 2; and a is 0 or 1.