JPH0578591A - Synthetic resin composition - Google Patents

Abstract

PURPOSE:To obtain a synthetic resin composition good in the dispersibility of solid matter and improved in the stability of nonvolatiles and storage. CONSTITUTION:The objective synthetic resin composition comprises an aqueous medium, a surfactant and a filler dispersed in the aqueous medium with the aid of the surfactant, wherein the surfactant comprises a polymer of a weight- average molecular weight of 150 to below 10000 and another polymer of a weight-average molecular weight of 10000 or above.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin composition used for fabrics such as carpets and skin materials for vehicles.

[0002]

2. Description of the Related Art A synthetic resin composition is laminated on a carpet or a cloth such as a skin material in a vehicle such as an automobile.
Then, the synthetic resin composition may contain a functional material in order to have various functions. For example, a synthetic resin composition in which a polymer latex and a filler made of hydrous magnesium silicate clay mineral and activated carbon are dispersed in an aqueous medium with a surfactant has been developed as a means for more efficiently removing a bad odor. However, the offensive odor in the vehicle is removed by applying this synthetic resin composition to the vehicle skin material (Japanese Patent Laid-Open No. 2-145864). This synthetic resin composition exhibits excellent deodorizing performance against a wide variety of malodors due to the adsorption characteristics of both the clay mineral and activated carbon, and by using activated carbon having electric conductivity and conductive cloth. It also has the function of removing static electricity.

[0003]

However, since only the polymer compound having a weight average molecular weight of 10,000 or more is used as the above-mentioned surfactant used as the dispersant, the thickening effect becomes large. Therefore, when the blending ratio (concentration) of the polymer latex and the solid content of the filler such as clay mineral and activated carbon is increased, the viscosity is remarkably increased, and as the industrially usable resin composition, the solid content is 2%.
The upper limit was about 5%.

Further, the solid content (nonvolatile content) in the resin composition
Has a great influence on productivity and workability (workability) in the step of applying to cloth and the drying step after application. As in the prior art, if the non-volatile content is small, it takes a long time to dry, so that the cost is increased and the productivity and workability are deteriorated.

As described above, in order to improve productivity, workability, etc., it is desired to increase the nonvolatile content.

In Example 1 of JP-A-2-145864, the nonvolatile content is about 35%, but this is a prototype at a laboratory level, and since the viscosity of the emulsion is extremely high, It is not suitable for practical use because it has poor productivity and processability.

Further, according to JP-A-2-145864, the solid content is apt to settle, and if it is left to stand at room temperature after the production, the solid content may be separated and settled in about two weeks, so that the viscosity may be lowered. Improved stability is desired.

The present invention has been made in view of the above-mentioned problems of the prior art. It has good dispersibility of the solid content, the viscosity does not increase even if the solid content concentration is increased, and the nonvolatile content and storage are It is an object to provide a synthetic resin composition having improved stability.

[0009]

The synthetic resin composition of the present invention comprises an aqueous medium, a surfactant, a polymer latex dispersed in the aqueous medium by the surfactant, and a filler. In the resin composition, the surfactant is characterized by comprising a polymer compound having a weight average molecular weight of 10,000 or more and a polymer compound having a weight average molecular weight of 150 or more and less than 10,000.

[0010]

The surfactant in the present invention contains a polymer compound having a weight average molecular weight of 150 or more and less than 10,000, so that the surfactant acts as a dispersant for the filler,
The dispersibility of the filler is improved. That is, an aqueous solution of a surfactant having a weight average molecular weight of 150 or more and less than 10,000 is
Since it has a low viscosity, it easily penetrates into the gaps between the secondary particles of the filler, and the secondary particles are sufficiently peptized and dispersed. As a result, the filler is dispersed in the primary particles or small agglomerates, so that it is difficult to settle without increasing the viscosity. Therefore, the viscosity does not increase even if the concentration of the solid content is increased, and the storage stability at room temperature is also improved.

[0011]

INDUSTRIAL APPLICABILITY The synthetic resin composition of the present invention improves the dispersibility of the solid content consisting of the polymer latex and the filler, so that the required amount of water can be reduced and the solid content can be increased at a low viscosity. it can. In addition, storage stability at room temperature is also improved.

[0012]

【Example】

(Specific Examples) Specific examples in which the present invention is more specific will be shown below.

The synthetic resin composition of the present invention comprises a polymer latex and a filler dispersed in an aqueous medium by a surfactant, and the surfactant has a high weight average molecular weight of 150 to less than 10,000. It is composed of a molecular compound and a polymer compound having a weight average molecular weight of 10,000 or more.

In the present invention, the aqueous medium is a dispersant for dispersing the polymer latex particles and the filler, and may contain a water-soluble polymer, an inorganic salt or the like. In addition, the aqueous medium volatilizes by drying after being applied to a cloth or the like, and as a result, the polymer latex particles fuse to form a film.

In the present invention, the surfactant is for stably dispersing the polymer latex and the filler in the aqueous medium. The surfactant comprises a polymer compound having a weight average molecular weight of 10,000 or more and a polymer compound having a weight average molecular weight of 150 or more and less than 10,000. When a polymer compound having a weight average molecular weight of less than 150 is contained, the surfactant penetrates deep into the pores of the filler (in particular, when the filler is clay mineral or activated carbon), and functions as a filler. In some cases, the odor may be reduced or the surfactant itself may be vaporized to be a source of odor, and the odor may be generated by a chemical reaction with a substance present in the atmosphere.
Further, when the polymer compound has a molecular weight of 10,000 or more, the action as a protective colloid thickener is larger than the action as a dispersant that helps the peptization / dispersion of the secondary particles of the filler. Therefore, the sedimentation of the filler due to the formation of the network structure of the protective colloid is prevented in the state where the secondary particles of the filler are insufficiently deflocculated / dispersed, and the thickening effect increases as the weight average molecular weight increases. Therefore, in consideration of workability and processability during production and use of the target synthetic resin composition, it is necessary to increase the amount of water used to optimize the viscosity of the synthetic resin composition, and the nonvolatile content is about 25%. It will be the upper limit.

Further, the synthetic resin composition of the present invention needs to be adjusted in viscosity according to the method of applying it to a cloth or the like. When the surfactant is composed of only a high molecular weight compound having a weight average molecular weight of 150 or more and less than 10,000, the dispersing effect is greater than the thickening effect, and therefore the secondary particles of the filler must be thawed to increase the viscosity to the desired viscosity. More surfactant than dispersant must be used. Although there is little influence such as deterioration of the function due to the use of an appropriate amount, if a large amount of surfactant is used in adjusting the high viscosity, the raw material cost may increase and the function may be affected. Therefore, a surfactant composed of a polymer compound having a weight average molecular weight of 10,000 or more is used together for adjusting the viscosity.

The above weight average molecular weight is 150 or more and 1000
The blending amount of the surfactant composed of a polymer compound of less than 0 is preferably in the range in which the solid content of the surfactant is 0.3 to 10 parts by weight with respect to 100 parts by weight of the solid content of the filler. Within this range, the dispersing effect of the filler is very large.

Further, the blending amount of the surfactant made of a polymer compound having a weight average molecular weight of 10,000 or more is 0.1 to 20 with respect to 100 parts by weight of the solid content of the filler. A range of parts by weight is desirable. Within this range, the formation and thickening effect of the protective colloid are good.

Examples of the surfactant include synthetic polymers, cellulose derivatives, alkylaryl sulfonates, polyoxyalkylene alkylaryl ethers, etc.
Examples of synthetic polymers include polyphosphates such as sodium tripolyphosphate, sodium tetraphosphate, and sodium hexametaphosphate, polyvinyl alcohol, sodium polyacrylate, polyvinylpyrrolidone, and styrene-maleic acid copolymers. Examples of the cellulose derivative include methyl cellulose, hydroxyethyl cellulose, carboxymethyl cellulose and the like. Examples of the alkyl aryl sulfonate include sodium alkyl naphthalene sulfonate, sodium alkyl benzene sulfonate, and the like. Examples of the polyoxyalkylene alkylaryl ether include polyoxyethylene phenol ether, polyoxybutylene nonylphenol ether and the like. In the present invention, at least one of the above surfactants is used.

The polymer latex is a main component of the synthetic resin composition. When the synthetic resin composition of the present invention is impregnated into a fabric, the polymer latex improves the dimensional accuracy of the fabric by binding the fibers constituting the fabric to the fibers, prevents the fibers from fraying, and fills them. It is a substance that holds additives such as agents and acts as a binder that fixes them to the fabric.

The polymer latex includes synthetic resin latex and rubber latex. Among them, the synthetic resin latex is composed of resin colloid particles as a dispersoid and water as a dispersion medium. During drying, the particles adhere to each other to effectively act as a binder. Specifically, the synthetic resin latex includes polyvinyl chloride latex, polyvinylidene chloride latex, polyurethane latex, polyacrylate ester latex, polyvinyl acetate latex, polyacrylonitrile latex and modified products and copolymers thereof. Can be mentioned. Specific examples of the rubber latex include natural rubber, styrene butadiene rubber, acrylonitrile rubber, acrylonitrile butadiene rubber, isoprene isobutylene rubber, polyisobutylene, polybutadiene, polyisoprene, polychloroprene, and polyethylene propylene. In the present invention, at least one of the above polymer latexes is used.

Further, among the above-mentioned polymer latexes, those having a glass transition temperature (Tg) of -70 to + 35 ° C. are desirable. If the Tg of the film is less than −70 ° C., it is too soft, and it becomes difficult to cover the filler during film formation, resulting in deterioration of function or stickiness of the film. Also, the Tg of the film
If it exceeds + 35 ° C., it may be too hard and the filler and the like may fall off when it is applied to a cloth or the like and processed or used, and the texture becomes poor. Furthermore, the T of the film
When g is -70 to + 15 ° C, more excellent properties can be obtained. Examples of the polymer latex having a film Tg of -70 to + 15 ° C include acrylic resin and ethylene-
Examples thereof include vinyl acetate-based resins, polyurethane-based resins, butadiene-based resins, and at least one of them is used.

Among the above polymer latexes, it is desirable to use an acrylic resin having an average particle size of 0.2 to 0.6 μm. The resin has excellent fine film-forming property and film flexibility, and has problems such as deterioration of function or stickiness of the film due to coating with a filler during film formation, deterioration of storage stability and adhesive strength. There is no.

As the acrylic resin, there is a polymer emulsion containing a (meth) acrylic acid ester as a main component.
As the main component (meth) acrylic acid ester,
Alkyl (meth) acrylates, for example, methyl (meth) acrylate, ethyl (meth) acrylate,
Butyl (meth) acrylate, 2-ethylhexyl (meth) acrylic acid, glycyl ester (meth) acrylic acid,
2-hydroxyethyl (meth) acrylate and the like can be mentioned. Copolymerizable ethylenically unsaturated monomers are used in combination with this main component, and examples of the monomer include threne, (meth) acrylonitrile, (meth) acrylamide, N-methylolacrylamide, Examples thereof include vinyl acetate, vinyl propionate, vinyl chloride, vinylidene chloride, (meth) acrylic acid, itaconic acid, fumaric acid, crotonic acid and maleic acid. When used in combination with the above-mentioned monomer, the content of the (meth) acrylic acid ester as a main component is preferably 50% by weight or more. Further, the acrylic resin is preferably formed by an emulsion polymerization method. For example, water, ethylenically unsaturated monomer, emulsifier (sodium dodecylbenzene sulfonate,
Polyoxyethylene alkyl ether etc.) and a radical polymerization catalyst are added, and the mixture is heated and stirred to complete the polymerization at a predetermined temperature. The particle size of the acrylic resin can be controlled by adjusting the concentration of the emulsifier during emulsion polymerization.

The filler is a functional material that exhibits various functions when it is used for cloth or the like. Examples of the filler include hydrous magnesium silicate clay minerals for removing malodorous substances, activated carbon, zeolite, activated carbon fibers, deodorants such as silica gel, and activated carbon for preventing static electricity. Conductive carbon black, polyacetylene,
Conductive polymers such as polypyrrole, metal powders such as copper, aluminum and stainless steel, conductive fiber substances such as carbon fibers and metal fibers, and the like are used, and at least one of them is used.

When the above-mentioned hydrous magnesium silicate clay mineral and activated carbon are used as a filler, it is possible to efficiently remove a bad odor and also remove static electricity. Examples of the hydrous magnesium silicate clay minerals include sepiolite, silottite, raffinite, falconite, palygorskite and the like. Also, what is commonly called mountain cork, mountain leather, mountain wood, sepiolite, attapulgite is this. You may use the thing which calcined these in the temperature range of 400-800 degreeC. The clay mineral may be in the form of powder, granules, or plates, but it is preferably crushed to the extent that the pores of the clay mineral remain, with a length of 10 μm or less and an aspect ratio of 100. The following aggregates of fine crystals are preferable.

The filler is used in the form of particles or powder,
A synthetic resin composition is constituted by dispersing it in a polymer latex.

The blending amount of the filler is preferably such that the solid content of the filler is 50 to 200 parts by weight with respect to 100 parts by weight of the solid content of the polymer latex. Within this range, the function of the filler is sufficiently exerted, and the original properties of the synthetic resin composition, that is, the improvement of the dimensional accuracy of the fabric, the prevention of the fraying of the yarn and the opening of the yarn, become good. When a hydrous magnesium silicate clay mineral and activated carbon are used together as a filler, the activated carbon is 5 to 90 parts by weight in 100 parts by weight of the filler.
It is preferable to use a blending amount of parts by weight. Within this range, the adsorption characteristics of both are sufficiently exerted as a synergistic effect.

Other additives such as flame retardants may be added to the synthetic resin composition of the present invention as long as the characteristics thereof are not impaired. Common flame retardants include phosphorus compounds, chlorine compounds, bromine compounds, guanidine compounds, antimony compounds, boron compounds, ammonium compounds, etc., and specific examples include primary ammonium phosphate, phosphoric acid. Secondary ammonium, phosphate triester, phosphite ester, phosphonium salt, phosphate triamide, chlorinated paraffin, dechlorane, ammonium bromide, tetrabromobisphenol A, tetrabromoethane, guanidine hydrochloride, guanidine carbonate, phosphoric acid Examples thereof include guanylurea, antimony oxide, sodium tetraborate decahydrate (borax), ammonium sulfate, ammonium sulfamate and the like.

Further, in order to improve conductivity, the synthetic resin composition of the present invention contains conductive polymer such as conductive carbon black, polyacetylene and polypyrrole, metal powder such as copper, aluminum and stainless steel, carbon fiber, A conductive fiber substance such as metal fiber may be used alone or in combination of two or more.

The method for producing the synthetic resin composition of the present invention is not particularly limited, and any production method may be used. For example, when clay minerals and activated carbon are used as the filler, the fillers are dry mixed, and the mixture is kneaded with water in which a surfactant is dissolved. Next, a polymer latex is added and further kneaded to obtain the synthetic resin composition of the present invention.

Further, a dry mixture of the filler and the surfactant may be dispersed in water, and the polymer latex may be added and kneaded.

Further, a dry mixture of the filler and the surfactant may be kneaded with the polymer latex diluted with water.

Further, in the above-mentioned three production methods, the surfactant can be used in several times. For example, the first use is to use a small amount for forming a dispersant and a protective colloid, and additionally use a surfactant as a thickener for a synthetic resin composition obtained by adding a polymer latex to adjust the viscosity. Good.

The synthetic resin composition of the present invention can be used for fabrics such as vehicle skins, and residential fabrics such as carpets.

(Examples) Examples of the present invention will be described below.

Example 1 A polymer latex having a polymer composition of butyl acrylate / methyl acrylate / acrylic acid = 80/1
8/2 (weight ratio), the glass transition temperature (T
g; a value measured by a dynamic rheometric dynamic viscoelasticity measuring device "Rheometric PSAII", the same in the following examples) using an acrylic emulsion (nonvolatile content 50%) having a temperature of -25 ° C. A synthetic resin composition for skin material was obtained by the method.

Sepiolite 9 having a grain size of 100 mesh or less
0 parts by weight and 90 parts by weight of activated carbon having a particle size of 250 mesh or less are dry-mixed, and sodium alkylnaphthalene sulfonate (weight average molecular weight 342) 0.9 is used as a surfactant.
A mixture of 5 parts by weight and 5 parts by weight of carboxymethyl cellulose having a weight average molecular weight of 130,000 in 366 parts by weight of water was mixed using a biaxial mixer. Then, 200 parts by weight of the acrylic emulsion (50% nonvolatile content) was added and mixed to obtain a synthetic resin composition having a nonvolatile content of 38%.

The synthetic resin composition thus obtained was cooled to room temperature (25
No change was observed even after 1 month when left still at (° C).

Further, the obtained synthetic resin composition was applied on the back surface of a fabric made of polyester fiber by using a doctor blade in a solid content of 110 g / m ² and dried in a hot air dryer at 130 ° C. for 20 minutes, A vehicle skin material was obtained. In order to evaluate the deodorizing performance of the obtained skin material, the adsorption amount of ammonia and the adsorption amount of toluene were determined by an adsorption test. The results of the ammonia adsorption amount are shown in FIG. 1, and the toluene adsorption amount is shown in FIG.

Example 2 In the synthetic resin composition of Example 1, the same amount of polyoxyethylene nonylphenol ether (weight average molecular weight 308) was used in place of 0.9 part by weight of sodium alkylnaphthalene sulfonate, and the other examples were used. By the same composition and operation as in 1, a synthetic resin composition having a nonvolatile content of 38% was obtained.

Example 3 In the synthetic resin composition of Example 1, the same amount of sodium polyacrylate (weight average molecular weight 4000) was used in place of 0.9 part by weight of sodium alkylnaphthalene sulfonate, and the other examples were used. A synthetic resin composition having a nonvolatile content of 38% was obtained by the same composition and operation.

Example 4 In the synthetic resin composition of Example 1, instead of the acrylic emulsion, the polymer composition was styrene / butadiene /
Acrylic acid = 50/47/3, measured T of the film
g of -35 ° C. SBR latex (nonvolatile content 50
%) Was used, and otherwise the same composition and operation as in Example 1 were carried out to obtain a synthetic resin composition having a nonvolatile content of 38%.

Example 5 In the synthetic resin composition of Example 1, instead of the acrylic emulsion, the polymer composition was vinyl acetate / ethylene =
At 80/20, the measured Tg of the film was −5 ° C. ethylene-vinyl acetate copolymer emulsion (nonvolatile content 5
0%) was used, and otherwise the same composition and operation as in Example 1 were used to obtain a synthetic resin composition having a nonvolatile content of 38%.

Example 6 In the synthetic resin composition of Example 1, instead of the acrylic emulsion, a polyester consisting of 1,4-butadiol / adipic acid was reacted with dimethylolpropionic acid and tolylene diisocyanate in a solvent to react. The product was subjected to chain extension and water dispersion in the presence of anhydrous piperazine and triethylamine in water, and then the solvent was removed to obtain a polyurethane latex (measured Tg of film: −15 ° C., nonvolatile content 50%). A synthetic resin composition having a nonvolatile content of 38% was obtained by using the same composition and operations as in Example 1 except for the above.

Example 7 In the synthetic resin composition of Example 1, instead of the acrylic emulsion, the polymer composition was butyl acrylate / methyl methacrylate / acrylic acid = 40/58/2,
An acrylic emulsion (nonvolatile content 50%) having a measured Tg of + 27 ° C. was used for the film, and the other examples were used.
A synthetic resin composition having a nonvolatile content of 38% was obtained by the same composition and operation.

Example 8 In the synthetic resin composition of Example 1, the polymer composition was styrene / butadiene / instead of acrylic emulsion.
Acrylic acid = 75/22/3, the measured T of the film
g of + 33 ° C SBR latex (nonvolatile content 50
%) Was used, and otherwise the same composition and operation as in Example 1 were carried out to obtain a synthetic resin composition having a nonvolatile content of 38%.

As described above, in each of Examples 1 to 8, the nonvolatile content is 38%, and it is understood that the dispersibility of the nonvolatile content is good.

Further, the synthetic resin compositions of Examples 1 to 8 were applied to fabrics and the like by a usual method, and the texture was observed, and the state when used as a vehicle skin material was also observed. The results are shown in Table 1.

[0050]

[Table 1]

As is clear from Table 1, all of Examples 1 to 8 are good in the texture of the coating process and the state of the vehicle skin material, and particularly Examples 1 to 6 are excellent. I understand.

The deodorizing performance of Examples 2 to 8 was similar to that of Example 1. Comparative Example 1

In the synthetic resin composition of Example 1, 0.
An attempt was made to prepare a synthetic resin composition by using the same composition and operation as in Example 1 except that 9 parts by weight of sodium alkylnaphthalene sulfonate was not used. I couldn't get anything.

Comparative Example 2 In the synthetic resin composition of Example 1, 0.9 parts by weight of sodium alkylnaphthalene sulfonic acid was not used, 800 parts by weight of water was used, and otherwise the same composition and operation as in Example 1 were used. Thus, a synthetic resin composition having a nonvolatile content of 24% was obtained.

The synthetic resin composition thus obtained was cooled to room temperature (25
When left still at (° C.), the viscosity was halved in 2 weeks. Further, as in Example 1, an attempt was made to make a vehicle skin material, but repeated coating is required to obtain the same film thickness as in Example 1,
Moreover, it could not be dried sufficiently under the same conditions as in Example 1.
Then, it was further dried to obtain a vehicle skin material. The deodorizing performance of this vehicle skin material was evaluated in the same manner as in Example 1. The results of the ammonia adsorption amount are shown in FIG. 1, and the toluene adsorption amount is shown in FIG.

As is clear from FIG. 1 and FIG. 2, the ammonia adsorption is almost the same in Example 1 and Comparative Example 2,
Regarding toluene adsorption, it can be seen that Example 1 has a larger adsorption amount than Comparative Example 2.

Example 9 A condenser, a thermometer, and a dropping funnel were attached to a reaction vessel made of stainless steel equipped with a stirrer, and the following raw material (A) was added to the vessel replaced with nitrogen.

(A) Deionized water 60 parts by weight The following raw material (B) was added to another reaction vessel and the mixture was heated and reacted to prepare a mixed solution of a monomer and an emulsifier.

(B) Deionized water 35 parts by weight Sodium lauryl sulfate 0.3 parts by weight Polyoxyethylene nonylphenol ether 4 parts by weight (HLB about 17) Butyl acrylate 80 parts by weight Methyl methacrylate 17 parts by weight Methacrylic acid 2 parts by weight Glycidyl methacrylate 1 part by weight

Further, the following raw material (C) was added to another container and reacted by heating to prepare a catalyst solution.

(C) Deionized water 7 parts by weight Ammonium persulfate 0.4 parts by weight

The temperature inside the reaction vessel containing the raw material (A) was adjusted to 8
The temperature was adjusted to 0 ° C., and 5% of the mixed solution from the raw material (B) and 10% of the solution from the raw material (C) were added with stirring. After that, the temperature in the reaction vessel was maintained at 80 ° C. for 15 minutes, and then the rest (95%) of the mixed solution from the raw material (B) and the rest (90%) of the solution from the raw material (C) were added dropwise over 180 minutes. And polymerized. During this period, the temperature inside the reaction vessel was maintained at 80 ± 2 ° C. After completion of dropping, the mixture was stirred at the same temperature for 30 minutes. After cooling the content to 30 ° C., the pH was adjusted to 7 to 8 with 25% aqueous ammonia, and filtered through a 200-mesh wire net to prepare an acrylic resin solution.

The concentration of the obtained acrylic resin is 50.2%.
Met. Also, the average particle size of acrylic resin is "particle size analyzer LA-500" by HORIBA, Ltd.
It was 0.35 μm as a result of measurement by. The Tg of the film was -20 ° C.

In the synthetic resin composition of Example 1, the same amount of the above acrylic resin was used instead of the acrylic emulsion, and the composition and operation were the same as in Example 1 except that the nonvolatile content was 38% and the viscosity was 5000 cps (25 ° C.). ) Was obtained. The stability of the obtained synthetic resin composition was observed, and the results are shown in Table 2.

The obtained synthetic resin composition was applied onto the surface of a fabric made of polyester fiber using a doctor blade so that the solid content was 110 g / m ^2, and
It was dried in a hot air dryer at 0 ° C. for 20 minutes to obtain a vehicle skin material. The texture and deodorizing performance of this vehicle skin material were evaluated as follows.

The texture is by hand. For the deodorizing performance, four acrylic boxes each having a cubic shape with a side of 45 cm were prepared, and two of the boxes were subjected to a mixed resin emulsion with the sample of the above-mentioned vehicle skin material on the inner ceiling portion. The surface was fixed so that it came into contact with the acrylic plate, and the box was sealed. Cigarette (highlight; manufactured by Japan Tobacco Inc., trade name) was burned for 2 cm in the box and left for 30 minutes. Then, the samples were taken out, and after 1 hour, the samples were placed on the bottoms of the remaining two boxes, and the boxes were sealed. After leaving it for 1 hour,
A panel of 12 people compared the odor intensity in the box containing each sample, and judged the superiority or inferiority. The results are shown in Table 2.

Example 10 In the preparation of the acrylic resin in Example 9, the composition of the raw material (A) at the time of emulsion polymerization was 60.5 parts by weight of deionized water and 0.5 parts by weight of sodium lauryl sulfate, and the others were carried out. An acrylic resin was prepared by the same composition and operation as in Example 9. The resulting acrylic resin has a nonvolatile content of 50.1
%, The average particle diameter was 0.15 μm, and the film had a Tg of −20 ° C.

Using this acrylic resin, a synthetic resin composition was prepared in the same manner as in Example 9, and a vehicle skin material was further prepared and its performance was evaluated. The results are shown in Table 2.

Example 11 In the preparation of the acrylic resin in Example 9, the composition of the raw material (A) at the time of emulsion polymerization was 61 parts by weight of deionized water and 1 part by weight of Glauber's salt, and otherwise the same composition as in Example 9 , An acrylic resin was prepared by the operation. The obtained acrylic resin has a nonvolatile content of 50.2%, an average particle size of 0.63 μm, and a T of the film.
It was g-20 degreeC.

Using this acrylic resin, a synthetic resin composition was prepared in the same manner as in Example 9, and a vehicle skin material was further prepared and its performance was evaluated. The results are shown in Table 2.

Example 12 In the preparation of the acrylic resin in Example 9, the composition of the raw material (B) at the time of emulsion polymerization was 60 parts by weight of 2-ethylhexyl acrylate, 38 parts by weight of butyl acrylate, 1 part by weight of methacrylic acid, and glycidyl. An acrylic resin was prepared with the same composition and operation as in Example 9 except that 1 part by weight of methacrylate was used. The obtained acrylic resin has a nonvolatile content of 50.0%, an average particle size of 0.40 μm, and a Tg− of the film.
It was 58 ° C.

Using this acrylic resin, a synthetic resin composition was prepared in the same manner as in Example 9, and a vehicle skin material was further prepared and its performance was evaluated. The results are shown in Table 2.

Example 13 In the preparation of the acrylic resin in Example 9, the composition of the raw material (B) at the time of emulsion polymerization was 40 parts by weight of butyl acrylate,
An acrylic resin was prepared by the same composition and operation as in Example 9 except that 17 parts by weight of methyl methacrylate, 2 parts by weight of methacrylic acid and 1 part by weight of glycidyl methacrylate were used. The resulting acrylic resin has a nonvolatile content of 50.0
%, The average particle diameter was 0.33 μm, and the film had a Tg of + 28 ° C.

Using this acrylic resin, a synthetic resin composition was prepared in the same manner as in Example 9, and a vehicle skin material was further prepared and its performance was evaluated. The results are shown in Table 2.

[0075]

[Table 2]

As is clear from Table 2, Examples 9 to 13
It can be seen that all of the samples have good stability of the synthetic resin composition and the properties of the skin material, and of these, Example 9 is the best.

[Brief description of drawings]

FIG. 1 is a diagram showing ammonia adsorption amounts in Examples and Comparative Examples of the present invention.

FIG. 2 is a diagram showing the amount of toluene adsorbed in Examples and Comparative Examples of the present invention.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mitsumasa Horii Aichi Prefecture Nagachite Town Aichi Prefecture, Nagakute Town No. 41 Yokoshiro Road 1 Toyota Central Research Institute Co., Ltd. (72) Inventor Masahiro Sugiura Nagachite Town, Aichi Prefecture Large-sized long-striped character 1st side street 41 Toyota Central Research Laboratory Co., Ltd. (72) Inventor Yoshio Yamada 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Automobile Co., Ltd. (72) Inventor Araki Araki 1 Toyota Town, Toyota City, Aichi Prefecture Address: Toyota Motor Corporation (72) Inventor Akihiro Matsuyama 1-1, Toyota-cho, Kariya city, Aichi Toyota Boshoku Co., Ltd. (72) Inventor Takatoshi Sekihara 1-1-chome, Kariya city, Aichi Toyota Boshoku (72) Inventor Umehara ▲ Kiyoshi ▼ 2-5-25 Takashihama, Takaishi-shi, Osaka (72) Inventor Reisaburo Tomioka Chiyoda, Takaishi-shi, Osaka 2-3

Claims (6)

[Claims] 1. A synthetic resin composition comprising an aqueous medium, a surfactant, a polymer latex dispersed in the aqueous medium by the surfactant, and a filler, wherein the surfactant is a weight average. A synthetic resin composition comprising a polymer compound having a molecular weight of 10,000 or more and a polymer compound having a weight average molecular weight of 150 or more and less than 10,000. 2. A weight average molecular weight of 150 or more and 10000.
The amount of the surfactant made of the polymer compound of less than 0.3 to 10 parts by weight per 100 parts by weight of the filler, and the amount of the surfactant made of the polymer compound having a weight average molecular weight of 10,000 or more is Per 100 parts by weight of filler, 0.
The synthetic resin composition according to claim 1, which is 1 to 20 parts by weight. 3. The synthetic resin composition according to claim 1, wherein the filler comprises hydrous silicate magnesium clay mineral and activated carbon. 4. When the total weight of hydrous silicate magnesium clay mineral and activated carbon is 100 parts by weight, activated carbon is 5
The synthetic resin composition according to claim 3, which is used in an amount of about 90 parts by weight. 5. The polymer latex has a glass transition temperature-
It is at least one selected from the group consisting of acrylic resins, ethylene-vinyl acetate resins, polyurethane resins, and butadiene resins having a temperature of 70 to + 15 ° C.
The synthetic resin composition described. 6. The polymer latex has an average particle size of 0.
The synthetic resin composition according to claim 1, which is an acrylic resin having a thickness of 2 to 0.6 µm.