JPH07316372A - Chlorine-containing resin composition - Google Patents

Abstract

PURPOSE:To obtain the composition excellent in thermal stability, little in coloring, and inhibited in foaming at a high temperatures by. adding specific amounts of a specific hydrotalcite and a borate ester to a chlorine-containing resin. CONSTITUTION:This composition is obtained by adding 0.01-20 pts.wt., preferably 0.1-10 pts.wt., of at least one kind of hydrotalcite compounds of the formula [(m) is a real number; 0<=x2/x1<10; 2<=x1+x2<20], and 0.001-1 pt.wt., preferably 0.01-0.5 pt.wt., of a borate ester (e.g. octyldiphenyl borate) to 100 pts.wt. of a chlorine-containing resin (e.g. PVC). The borate ester is preferably added in an amount of 1-30wt.% based on the hydrotalcite compounds.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chlorine-containing resin composition, and more specifically, by adding a hydrotalcite compound and a borate ester to a chlorine-containing resin, it has excellent thermal stability and colorability, Alternatively, it relates to a chlorine-containing resin composition in which foaming is suppressed when exposed to high temperatures.

[0002]

2. Description of the Related Art A chlorine-containing resin is dehydrochlorinated by heat or light, and is colored and deteriorated due to the dehydrochlorination. Therefore, chlorine-containing resin,
Stabilization is performed by adding stabilizers such as lead-based, organotin-based, and metallic soap-based stabilizers.

The chlorine-containing resin is also effective as an insulating material because it has excellent electric insulation, arc resistance, tracking resistance, and withstand voltage, but in particular, it covers electric wires and cables. When used as a material, high heat resistance (thermal stability) is required. For this reason, lead-based stabilizers are mainly used, but due to their toxicity problems, it is desired to switch to less toxic stabilizers.

For example, barium-zinc system, calcium-
Stabilizers based on metal soaps such as zinc have a relatively low toxicity, but their stabilizing effect is insufficient, and it is necessary to use other stabilizing aids in combination. Among the above-mentioned stabilizing aids, hydrotalcite compounds are excellent as heat resistance improvers, and by using these in combination, those having satisfactory performance in terms of heat resistance have been obtained.

However, when the hydrotalcite compound is blended with a chlorine-containing resin, there are disadvantages that coloring occurs and foaming occurs when exposed to high temperature for a long time. If foaming occurs, there will be holes or tears from it,
In particular, when used as a wire covering material, there is a risk of electric leakage.

Therefore, an object of the present invention is to provide a chlorine-containing resin composition which is excellent in thermal stability, has a small coloring even when a hydrotalcite compound is added, and suppresses foaming at high temperatures. It is in.

[0007]

Means for Solving the Problems As a result of intensive studies by the present inventors, a chlorine-containing resin composition obtained by adding a specific amount of a specific hydrotalcite compound and boric acid ester to a chlorine-containing resin in combination. It was found that the product can achieve the above object.

The present invention was made on the basis of the above findings, and 100 parts by weight of a chlorine-containing resin is used to prepare a hydrotal represented by the general formula (I) of the following [Chemical formula 2] (the same as the above [Chemical formula 1]). The present invention provides a chlorine-containing resin composition obtained by adding 0.01 to 20 parts by weight of a site compound and 0.001 to 1 part by weight of boric acid ester.

[0009]

[Chemical 2]

The chlorine-containing resin composition of the present invention will be described in detail below.

The hydrotalcite compound used in the present invention is a compound represented by the above general formula (I),
A hydrous double salt compound composed of magnesium and aluminum, or zinc, magnesium and aluminum (a compound in which a part of the magnesium component is replaced by zinc).

The hydrotalcite compound may be a natural product or a synthetic product. As a method for synthesizing the above-mentioned synthetic product, Japanese Patent Publication No. 46-2280,
Japanese Examined Patent Publication No. 50-30039, Japanese Examined Patent Publication No. 51-2912
Known methods such as those described in JP-A No. 9 and JP-A No. 61-174270 can be used. Further, in the present invention, the hydrotalcite compound can be used without being limited by its crystal structure, crystal particle size, presence or absence of crystal water, and the amount thereof.

On the surface of the hydrotalcite compound, higher fatty acid such as stearic acid, higher fatty acid metal salt such as alkali metal oleate, organic sulfonic acid metal salt such as alkali metal dodecylbenzenesulfonic acid, higher fatty acid amide Those coated with higher fatty acid ester or wax can also be used.

The above-mentioned hydrotalcite compounds may be used either individually or in combination of two or more.

The amount of the hydrotalcite compound added is 0.01 to 2 with respect to 100 parts by weight of the chlorine-containing resin.
It is 0 part by weight, preferably 0.1 to 10 parts by weight. If the addition amount is less than 0.01 part by weight, almost no effect is obtained, and if it is more than 10 parts by weight, the effect is not improved and the chlorine-containing resin composition may be greatly colored.

The boric acid ester used in the present invention is preferably a compound represented by the following general formula (II).

[0017]

[Chemical 3]

The above boric acid ester reacts, for example, boric anhydride or boron chloride with a monohydric or polyhydric alcohol which may have an unsaturated bond or a phenol which may have a substituent. It is obtained by

Examples of the alcohols include methanol, ethanol, propanol, isopropanol, butanol, pentanol, hexanol, heptanol, octanol, 2-ethylhexanol, nonyl alcohol, decanol, undecanol, dodecanol, tridecanol, tetradecanol, Pentadecanol, hexadecanol, heptadecanol, stearyl alcohol, oleyl alcohol, ethylene glycol, polyethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, polypropylene glycol, 1,3-butanediol, 1, 4-butanediol, neopentyl glycol, glycerin,
Examples include pentaerythritol, dipentaerythritol, sorbitol, mannitol and the like. Examples of the above-mentioned phenols include phenol, cresol, p-tert-butylphenol, nonylphenol,
2,4-di-tert-butylphenol, 2,6-di-tert-butyl-4-methylphenol and the like can be mentioned.

Therefore, examples of the above boric acid ester include trimethyl borate, triethyl borate, triisopropyl borate, tridecyl borate, tris (1,2-propylene glycol) borate, monoglyceride borate, and triborate borate. Examples include phenyl, tricresyl borate, tris (p-tert-butylphenyl) borate, tris (nonylphenyl) borate, octyldiphenyl borate, and among these, boric acid and phenols are particularly derived. Borates are preferred.

The amount of the borate ester added is 0.001 to 1 part by weight, preferably 0.01 to 0.5 part by weight, based on 100 parts by weight of the chlorine-containing resin. If the addition amount is less than 0.001 part by weight, the effect is hardly seen, and if it is more than 1 part by weight, the effect is not improved.
There is a possibility that the thermal stability of the chlorine-containing resin may be significantly reduced.

Further, the boric acid ester is preferable because its effect is particularly exhibited when it is blended in the range of 1 to 30% by weight with respect to the hydrotalcite compound.

The borate ester and the hydrotalcite compound may be added to the chlorine-containing resin separately, but they may be blended in advance or the borate ester may be surface-treated with the hydrotalcite compound. Therefore, the effect becomes larger.

The method of the surface treatment is not particularly limited, but for example, the hydrotalcite compound and the borate ester are dispersed in an inert solvent such as toluene and stirred at 20 to 200 ° C. for 1 to 10 hours. Then, a method in which the solvent is distilled off or filtered after that is preferable. The treated product (treated product) obtained by such a method is a powder having good fluidity, and it is considered that the borate ester is adsorbed on the surface or interlayer of hydrotalcite.

Examples of the chlorine-containing resin used in the present invention include polyvinyl chloride, chlorinated polyvinyl chloride,
Polyvinylidene chloride, chlorinated polyethylene, vinyl chloride-vinyl acetate copolymer, vinyl chloride-ethylene copolymer, vinyl chloride-propylene copolymer, vinyl chloride-styrene copolymer, vinyl chloride-isobutylene copolymer,
Vinyl chloride-vinylidene chloride copolymer, vinyl chloride-styrene-maleic anhydride terpolymer, vinyl chloride, styrene-acrylonitryl copolymer, vinyl chloride-butadiene copolymer, vinyl chloride-isoprene copolymer , Vinyl chloride-chlorinated propylene copolymer, vinyl chloride-vinylidene chloride-vinyl acetate terpolymer, vinyl chloride-
Maleic acid ester copolymers, vinyl chloride-methacrylic acid ester copolymers, vinyl chloride-acrylonitrile copolymers, vinyl chloride-various vinyl ether copolymers and other chlorine-containing resins, and the chlorine-containing resins described above or chlorine-containing resins. Examples include blends of resins and other chlorine-free synthetic resins, block copolymers, graft copolymers, and the like.

To the chlorine-containing resin composition of the present invention, a metal-based stabilizer usually used in the composition can be added. Examples of the metal stabilizer include a lead-based stabilizer and an organic acid metal salt. , Inorganic metal stabilizers, organic tin stabilizers, and composite stabilizers thereof.

Examples of the lead-based stabilizer include lead white,
Basic lead silicate, basic lead sulfate, dibasic lead sulfate, tribasic lead sulfate, basic lead sulfite, dibasic lead phosphite, silica gel co-precipitated lead silicate, dibasic lead phthalate, tribasic Lead maleate, lead salicylate, lead stearate, basic lead stearate, dibasic lead stearate, lead laurate,
Examples thereof include lead octylate, lead 12-hydroxystearate, lead behenate, and lead naphthenate.

The metal species constituting the above organic acid metal salt and the above inorganic metal stabilizer include Li, Na, Ca and B.
Examples thereof include a, Mg, Sr, Zn and Al.

Examples of the organic acid which constitutes the organic acid metal salt include carboxylic acids, organic phosphoric acids and phenols. Examples of the carboxylic acid include acetic acid, lactic acid, stearyl lactic acid, caproic acid, pelargonic acid, lauric acid, 2-ethylhexylic acid, myristic acid, palmitic acid, undecylenic acid, ricinoleic acid, linoleic acid, linoleic acid, neodecanoic acid, oleic acid,
Stearic acid, isodecanoic acid, isostearic acid, 12
-Hydroxystearic acid, 12-ketostearic acid,
Chloro-stearic acid, phenyl-stearic acid, arachidic acid, behenic acid, erucic acid, brassic acid and similar acids, as well as naturally occurring fatty acids such as tallow fatty acid, coconut oil fatty acid, tung oil fatty acid, soybean oil fatty acid and cottonseed oil fatty acid. Acid mixture, benzoic acid, chlorobenzoic acid, toluic acid, salicylic acid, p-tertiary butyl benzoic acid, 5-tertiary octyl salicylic acid, naphthenic acid, xylyl acid, ethyl benzoic acid, isopropyl benzoic acid, ditertiary butyl. Examples thereof include benzoic acid, bromobenzoic acid, maleic acid, adipic acid, phthalic acid, monobutyl maleate, monodecyl phthalate and cyclohexanedicarboxylic acid. Further, as the organic phosphoric acid, mono- or dioctyl phosphoric acid,
Mono or didodecyl phosphoric acid, mono or dioctadecyl phosphoric acid, mono or di- (nonylphenyl) phosphoric acid,
Examples thereof include phosphonic acid nonylphenyl ester and phosphonic acid stearyl ester. Examples of the above-mentioned phenols include phenol, cresol, ethylphenol, p-tert-butylphenol, cyclohexylphenol, nonylphenol, dodecylphenol, and the like, whether they are regular salts or basic salts, It may be an overbased complex.

Examples of the above-mentioned inorganic metal stabilizers include
Oxide, hydroxide, carbonate, basic carbonate, (meth) borate, (meth) silicate, (sub) phosphite, basic phosphate, aluminate, titanic acid of the above metal species Examples thereof include salts, stannates, and rhodanates.

Examples of the above-mentioned organotin stabilizers include methylstannoic acid, butylstannoic acid, octylstannoic acid, dimethyltin oxide, dibutyltin oxide, dioctyltin oxide, dimethyltin sulfide and dibutyltin. Sulfide, dioctyltin sulfide, monobutyltin oxide sulfide, methyl thiostannoic acid, butyl thiostanoic acid, octyl thiostanoic acid, dibutyltin dilaurate,
Dibutyltin distearate, dioctyltin dioleate,
Dibutyltin basic laurate, dibutyltin dicrotonate, dibutyltin bis (butoxydiethylene glycol malate), dibutyltin methyl octyl neopentyl glycol malate, dibutyltin isooctyl 1,4
-Butanediol malate, dibutyltin dimethacrylate, dibutyltin dicinnamate, dioctyltin bis (oleyl maleate), dibutyltin bis (stearyl maleate), dibutyltin itaconate, dioctyltin malate, dimethyltin dicrotonate, dioctyltin bis (butylmalate) ), Dibutyltin dimethoxide, dibutyltin dilauroxide, dioctyltin ethyleneglycoxide,
Pentaerythritol-dibutyltin oxide condensate, dibutyltin bis (lauryl mercaptide), dimethyltin bis (stearyl mercaptide), monobutyltin tris (lauryl mercaptide), dibutyltin-β-mercaptopropionate, dioctyl Tin-β-mercaptopropionate, dibutyltin mercaptoacetate, monobutyltin tris (isooctylmercaptoacetate), monooctyltin tris (2-ethylhexylmercaptoacetate), dibutyltin bis (isooctylmercaptoacetate), dioctyltin bis ( Isooctyl mercaptoacetate), dioctyl tin bis (2-ethylhexyl mercapto acetate), dimethyl tin bis (isooctyl mercapto acetate), dimethyl tin bis (isooctyl mer) Captopropionate), monobutyltin tris (isooctyl mercaptopropionate), bis [monobutyldi (isooctoxycarbonylmethylenethio) tin] sulfide, bis [dibutylmono (isooctoxycarbonylmethylenethio) tin] sulfide, monobutyl Monochlorotin bis (isooctyl mercaptopropionate), monobutyl monochlorotin bis (isooctyl mercaptoacetate), monobutyl monochlorotin bis (lauryl mercaptide), butyltin bis (ethylcellosolbumarate), bis (dioctyl) Tin butyl malate) malate, bis (methyltin diisooctyl glycolate) disulfide, bis (methyl / dimethyltin mono / diisooctylthioglycolate) disulfide, bis (methyltin diii) Octyl thioglycolate) trisulfide, bis (butyltin diisooctyl thioglycolate) trisulfide, 2
-Butoxycarbonylethyltin tris (butylthioglycolate) and the like.

The amount of the metal-based stabilizer added is preferably 0.01 to 10 parts by weight, more preferably 0.05 to 5 parts by weight, based on 100 parts by weight of the chlorine-containing resin.

The chlorine-containing resin composition of the present invention may be further combined with an organic phosphorus compound, an epoxy compound, a polyol, a metal silicate salt, a light stabilizer, other organic stabilizers, plasticizers, fillers and the like. Shows excellent synergistic effect.

Examples of the above-mentioned organic phosphorus compound include triphenyl phosphite, tris (2,4-ditert-butylphenyl) phosphite, tris (nonylphenyl).
Phosphite, tris (dinonylphenyl) phosphite, tris (mono, dimixed nonylphenyl) phosphite, diphenylacid phosphite, 2,2′-methylenebis (4,6-didaisanbutylphenyl) octylphosphite, diphenyl Decyl phosphite, phenyldiisodecyl phosphite, tributyl phosphite, tri (2-ethylhexyl) phosphite, tridecyl phosphite, trilauryl phosphite, dibutyl acid phosphite, dilauryl acid phosphite, trilauryl trithiophosphite, bis (Neopentyl glycol) -1,4-cyclohexane dimethyl diphosphite, bis (2,4-ditertiary butylphenyl) pentaerythritol diphosphite, distearyl pentaerythrite Benzyl diphosphite, phenyl-
4,4'-isopropylidene diphenol pentaerythritol diphosphite, tetra (C12-15 mixed alkyl) -4,4'-isopropylidene diphenyl diphosphite, hydrogenated-4,4'-isopropylidene diphenol poly Phosphite, bis (octylphenyl)
Bis [4,4'-n-butylidene bis (2-tert-butyl-5-methylphenol)]-1,6-hexanediol diphosphite, tetratridecyl-4,4'-butylidene bis (2-tert-butyl-) 5-methylphenol) diphosphite, hexa (tridecyl) -1,1,
3-tris (2-methyl-5-tert-butyl-4-hydroxyphenyl) butane triphosphite, 9,10-
Examples thereof include dihydro-9-oxa-10-phosphaphenanthrene-10-oxide.

The amount of the above organic phosphorus compound added is preferably 0.01 to 5 parts by weight, particularly 0.1 to 3 parts by weight, based on 100 parts by weight of the chlorine-containing resin.

Examples of the epoxy compound include epoxidized soybean oil, epoxidized linseed oil, epoxidized fish oil, epoxidized tall oil fatty acid ester, epoxidized beef tallow oil, epoxidized castor oil, epoxidized safflower oil,
Epoxidized linseed oil fatty acid butyl, epoxy methyl stearate, -butyl, 2-ethylhexyl or -stearyl, tris (epoxypropyl) isocyanurate, 3- (2-xenoxy) -1,2-epoxypropane, epoxidized polybutadiene, Bisphenol-A diglycidyl ether, vinylcyclohexene diepoxide, dicyclopentadiene diepoxide, 3,4-
Examples thereof include epoxycyclohexyl-6-methylepoxycyclohexanecarboxylate.

The amount of the above epoxy compound added is preferably 0.01 to 20 parts by weight, particularly 0.5 to 10 parts by weight, based on 100 parts by weight of the chlorine-containing resin.

Examples of the above-mentioned polyols include sorbitol, trimethylolpropane, ditrimethylolpropane, pentaerythritol, dipentaerythritol, polypentaerythritol, pentaerythritol or a half ester of stearic acid of dipentaerythritol, bis (dipentaerythritol). Examples include adipate, glycerin, tris (2-hydroxyethyl) isocyanurate, and the like.

The amount of the above polyols added is preferably 0.01 to 20 parts by weight, particularly 0.1 to 5 parts by weight, based on 100 parts by weight of the chlorine-containing resin.

Examples of the silicate metal salt include calcium silicate, magnesium silicate, barium silicate, zinc silicate, aluminum silicate, and complex silicate metal salt which may have a zeolite structure.

The amount of the metal silicate salt added is preferably 0.01 to 20 parts by weight, more preferably 0.1 to 10 parts by weight, based on 100 parts by weight of the chlorine-containing resin.

Examples of the light stabilizer include 2,4-
2-hydroxybenzophenones such as dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-octoxybenzophenone, and 5,5'-methylenebis (2-hydroxy-4-methoxybenzophenone); 2- (2 '-Hydroxy-
5'-methylphenyl) benzotriazole, 2-
(2'-Hydroxy-5'-tertiary octylphenyl) benzotriazole, 2- (2'-hydroxy-3 ',
5'-di-tert-butylphenyl) benzotriazole, 2
-(2'-hydroxy-3 ', 5'-di-tert-butylphenyl) -5-chlorobenzotriazole, 2- (2'-
Hydroxy-3′-tert-butyl-5′-methylphenyl) -5-chlorobenzotriazole, 2- (2′-hydroxy-3 ′, 5′-dicumylphenyl) benzotriazole, 2,2′-methylenebis ( 4-tertiary octyl-6-benzotriazolyl) phenol and the like 2-
(2'-hydroxyphenyl) benzotriazoles;
Phenyl salicylate, resorcinol monobenzoate, 2,4-di-tert-butylphenyl-3 ', 5'-di-tert-butyl-4'-hydroxybenzoate: hexadecyl-3,5-di-tert-butyl-4-hydroxybenzoate, etc. Benzoates; 2-ethyl-2'-ethoxyoxanilide, 2-ethoxy-4'-dodecyloxanilide and other substituted oxanilides; ethyl-α-cyano-
Cyanoacrylates such as β, β-diphenyl acrylate and methyl-2-cyano-3-methyl-3- (p-methoxyphenyl) acrylate; 2,2,6,6-tetramethyl-4-piperidyl stearate, 1 , 2,
2,6,6-pentamethyl-4-piperidyl stearate, 2,2,6,6-tetramethyl-4-piperidyl benzoate, bis (2,2,6,6-tetramethyl-4
-Piperidyl) sebacate, bis (1,2,2,6,6)
-Pentamethyl-4-piperidyl) sebacate, tetrakis (2,2,6,6-tetramethyl-4-piperidyl) -1,2,3,4-butane tetracarboxylate, tetrakis (1,2,2,6) 6-pentamethyl-
4-piperidyl) -1,2,3,4-butanetetracarboxylate, bis (1,2,2,6,6-pentamethyl-4-piperidyl) di (tridecyl) -1,2,
3,4-butanetetracarboxylate, bis (1,
2,2,6,6-pentamethyl-4-piperidyl) -2
-Butyl-2- (3,5-di-tert-butyl-4-hydroxybenzyl) malonate, 1- (2-hydroxyethyl) -2,2,6,6-tetramethyl-4-piperidinol / diethyl succinate Condensate, 1,6-bis (2,2
2,6,6-Tetramethyl-4-piperidylamino) hexane / dibromoethane polycondensate, 1,6-bis (2,2
2,6,6-Tetramethyl-4-piperidylamino) hexane / 2,4-dichloro-6-tert-octylamino-
s-triazine polycondensate, 1,6-bis (2,2,6,
6-tetramethyl-4-piperidylamino) hexane /
Examples thereof include hindered amine compounds such as 2,4-dichloro-6-morpholino-s-triazine polycondensate.

The above-mentioned light stabilizer is added in an amount of chlorine-containing resin 1
0.01 to 5 parts by weight, particularly 0.1
It is preferably about 3 to 3 parts by weight.

Examples of the other organic stabilizers mentioned above include β-aminocrotonates such as 1,4-butanediol bis (β-aminocrotonate) and thiodiglycol bis (β-aminocrotonate); Urea such as diphenylurea and diphenylthiourea; indole such as α-phenylindole and α- (octylphenyl) indole; 2,6-dimethyl-3,5-dicarbococtoxy-1,4-dihydropyridine Β-diketone compounds such as dibenzoylmethane, benzoylacetone, stearoylbenzoylmethane, caproylbenzoylmethane and dehydroacetic acid, dihydropyridines such as 2,6-dimethyl-3,5-dicarblauryloxy-1,4-dihydropyridine; Trimethylolpropane, glycerin, tris (hydro) Shiechiru) isocyanurate, pentaerythritol, dipentaerythritol,
Polyhydric alcohols such as mannitol, sorbitol, pentaerythritol / stearic acid ester, dipentaerythritol / adipic acid ester, dipentaerythritol / pyrrolidone carboxylic acid ester; dilauryl thiodipropionate, distearyl thiodipropionate, penta Organic sulfur compounds such as erythritol tetra (lauryl mercaptopropionate); bisphenol A, 2,6-di-tert-butyl-p-cresol, stearyl-3,5-di-tert-butyl-4-hydroxyphenylpropionate Examples thereof include phenols and melamines.

Examples of the plasticizer include phthalate plasticizers such as diheptyl phthalate, dioctyl phthalate and dinonyl phenyl phthalate, adipate plasticizers such as dioctyl adipate, diisononyl adipate, di (butyl diglycol) adipate, and phosphate. Examples thereof include plasticizers, polyester plasticizers, chlorinated paraffin plasticizers, trimellitate plasticizers, pyromellitate plasticizers, and diphenyltetracarboxylate plasticizers.

Examples of the filler include calcium carbonate, silica, clay, glass beads, mica, sericite, glass flakes, asbestos, wollastonite, potassium titanate, PMF, gypsum fiber, zonotolite,
Examples include fillers such as MOS, phosphate fibers, glass fibers, carbon fibers and aramid fibers.

The chlorine-containing resin composition of the present invention also comprises
In addition, if necessary, for example, a crosslinking agent, a foaming agent, an antistatic agent, an antifogging agent, an antiplateout agent, a surface treatment agent, a lubricant, a pigment, a flame retardant, a fluorescent agent, a mildewproofing agent, a bactericide, a metal Additives such as activators, photodegradants, processing aids, mold release agents, and reinforcing agents can be included.

The chlorine-containing resin composition of the present invention can be obtained using various processing methods such as calendering, extrusion, injection molding, blow molding, paste molding, powder molding and the like.

The composition of the present invention is used in various applications such as coating materials for electric wires, home electric appliances, interior / exterior materials for automobiles, pipes, agricultural films, food packaging materials, wallpaper and the like.

[0050]

EXAMPLES The chlorine-containing resin composition of the present invention will be described below in more detail with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples.

Example 1 By the following (blending), the mixture was kneaded at 170 ° C. for 5 minutes, and then mixed.
The sheet was lifted at 7 mm, and a heat stability test (HS) and a foaming test were performed. Also, roll up the sheets in the same manner and stick them together, and under conditions of 190 ° C and 200 kg / cm ² ,
It was pressed for 0 minutes to prepare a test piece having a thickness of 2 mm, and the coloring property was evaluated. The results are shown in [Table 1] below.

The thermal stability test was carried out by placing the kneaded sheet in a gear oven at 190 ° C. and measuring the blackening time. Further, the foamability test,
An aluminum sheet is applied to one side (open type) or both sides (closed type) of the roll-up sheet and adhered with a roller, and these are put in a gear oven at 210 ° C for 10 minutes or 30 minutes, and the foaming state at that time is visually evaluated. I went by. This evaluation is a 10 step scale, where 1 represents a state in which no bubbles are observed, and the number of bubbles increases as the numerical value increases.
In the case of 10, air bubbles are observed on almost the entire surface. Also,
The above-mentioned evaluation of colorability was visually evaluated on a scale of 10 to 1
Indicates that there is no coloration, and that the coloration increases as the value increases, and 10 indicates that the color is blackish brown.

(Combination) Polyvinyl chloride (average molecular weight 1300) 100 parts by weight Diisononyl phthalate 50 Zinc stearate 0.5 HT-1 ^{* 1} 3 Test compound (shown in [Table 1] below) [Table 1] * 1 : Compositional formula; hydrotalcite compound represented by Mg _4.5 Al ₂ (OH) ₁₃ · CO ₃ · 3.5H ₂ O

[0054]

[Table 1]

Example 2 With the following (formulation), the foamability and colorability were tested in the same manner as in Example 1. The results are shown in [Table 2] below.

(Combination) Polyvinyl chloride (average molecular weight 1300) 100 parts by weight Diisononyl phthalate 70 Zinc stearate 0.9 Calcium silicate 0.5 Dibenzoylmethane 0.1 Hydrotalcite treated with triphenyl borate 3. 5 (weight ratio 10/1) (shown in [Table 2] below)

[0057]

[Table 2]

From the results of the above [Table 1] and [Table 2], the following is clear. When only the hydrotalcite compound was added to the chlorine-containing resin (Comparative Examples 1-1 and 2-1), the effect of improving thermal stability was remarkable, but foaming was also extremely large. In addition, even when a hydrotalcite compound and an organic acid such as benzoic acid were used in combination with or added to a chlorine-containing resin (Comparative Examples 1-3 and 1-4), the performance was almost unchanged. Absent. In addition, when the chlorine-containing resin is used in combination or treated with a hydrotalcite compound and boric acid (Comparative Example 1-5), or when the hydrotalcite compound and boric acid ester are added to the chlorine-containing resin more than necessary. Reduces the thermal stability significantly.

On the other hand, in the case where the chlorine-containing resin is added with or treated with the hydrotalcite compound represented by the general formula (I) and an appropriate amount of borate ester (Examples 1-1 to 1- 6,2-1 to 2-4) has a large effect of suppressing foaming with almost no decrease in thermal stability.
Furthermore, it is also excellent in colorability.

[0060]

EFFECTS OF THE INVENTION The chlorine-containing resin composition of the present invention is excellent in thermal stability, has little coloring even when a hydrotalcite compound is added, and has suppressed foaming at high temperatures.

Claims (1)

[Claims] 1. To 100 parts by weight of a chlorine-containing resin, 0.01 to 20 parts by weight of at least one hydrotalcite compound represented by the following general formula (I), and 0.001 to 1 borate ester. A chlorine-containing resin composition obtained by adding 1 part by weight. [Chemical 1]