JPH09176420A - Stabilized vinyl chloride resin composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize a vinyl chloride resin without using a heavy metal-based stabilizer by adding trehalose and pref. a metal salt of an org. acid and an epoxy compd. to the resin. SOLUTION: This resin compsn. is obtd. by adding 0.01-5 pts.wt. trehalose to 100 pts.wt. vinyl chloride resin. Here, the term 'vinyl chloride resin' includes a homopolymer, a copolymer, a graft copolymer, or a block copolymer of vinyl chloride, their chlorination products and polymer blends, etc. Trehalose is a compd. represented by formula I or II or an isomer thereof. Further addition of a metal salt of an org. acid, an epoxy compd., etc., imparts very high thermal stability and light resistance to the compsn. without using a cadmium- or lead- based stabilizer.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a vinyl chloride resin stabilizing composition. More specifically, it relates to a vinyl chloride resin-stabilized composition having improved thermal stability and light resistance.

[0002]

BACKGROUND ART It is well known that vinyl chloride resins cannot be made into excellent products because they are colored by high heat during molding or become processed products and are deteriorated by photodegradation mainly due to ultraviolet rays. In order to eliminate such defects, various stabilizers have been conventionally studied and put to practical use. For example, a stabilizer containing cadmium or lead had excellent properties as a heat stabilizer, an initial coloring inhibitor, and a weather resistance stabilizer. However, in recent years, stabilizers containing cadmium and lead, which have been used very effectively in the past, have become a problem due to concerns about the working environment when handling stabilizers and pollution problems when treating products containing stabilizers as waste. Accordingly, various low-toxicity stabilizers have been studied and proposed accordingly. Recently, low-toxic organotin compounds have been developed and put to practical use, but they are not always sufficient as stabilizers requiring strict conditions.

[0003]

[Means for Solving the Problems] As a result of various studies by the present inventors in order to solve these problems, vinyl chloride resin stabilization which shows excellent thermal stability and light resistance effects and has very little toxicity. A composition was developed.

That is, the present inventor (1) is characterized by containing trehalose in a vinyl chloride resin.
Vinyl chloride resin stabilizing composition. (2) Vinyl chloride resin with (a) trehalose,
(B) A vinyl chloride resin-stabilized composition comprising a metal salt of an organic acid. (3) Vinyl chloride resin with (a) trehalose,
(B) at least one metal salt of an organic acid, and (c)
There is provided a vinyl chloride resin stabilizing composition comprising at least one of an epoxy compound, an organic phosphite, a phenolic antioxidant and a β-diketone compound.

The vinyl chloride resin usable in the present invention includes polyvinyl chloride, vinyl chloride and a copolymer of vinyl chloride and a monomer copolymerizable therewith, a graft polymer, a block polymer, (ethylene is an example of the comonomer). , Olefins such as propylene, vinyl acetate, vinyl laurate, acrylic acid esters, saturated acid vinyl esters such as methacrylic acid methyl ester, unsaturated acid alkyl esters, alkyl vinyl ethers such as lauryl vinyl ether, maleic acid, acrylonitrile, styrene, methyl Styrene, vinylidene chloride, vinylidene fluoride, etc.),
Furthermore, terpolymer of polyvinyl chloride and, for example, acrylonitrile-butadiene-sterene, methacrylic acid methyl ester-butadiene-sterene, chlorinated polyethylene,
Polymer blend with ethylene-vinyl acetate copolymer, etc., post-treated with polyvinyl chloride alcohol, etc.
Examples include vinyl chloride resins such as post-chlorinated products.

The trehalose of the composition of the present invention is represented by the following formulas (1) and (2), and these are α, α-, α, β.
-, Β, β-isomers are taken.

Embedded image

Embedded image The amount of trehalose added is 10
It is 0.001 to 5 parts by weight, preferably 0.01 to 5 parts by weight, relative to 0 parts by weight.

The metal which is a constituent of the organic acid metal salt of the composition of the present invention includes lithium, sodium, potassium,
Magnesium, calcium, strontium, barium, zinc, cadmium, aluminum, tin, lead are indicated. As the organic acid, there are saturated or unsaturated fatty acids having a straight chain or a side chain, polyvalent carboxylic acids, aromatic carboxylic acids, phenol compounds and those having a substituent in these acids, and specific examples include 2- Ethylhexoic acid, isooctylic acid, octylic acid, lauric acid, isopalmitic acid,
Stearic acid, isostearic acid, oleic acid, ricinoleic acid, linoleic acid, linoleic acid, isodecanoic acid, 1
2-hydroxystearic acid, 12-ketostearic acid, phenylstearic acid, arachidic acid, behenic acid, montanic acid, maleic acid, malonic acid, sebacic acid, azelaic acid, adipic acid, phthalic acid, cyclohexanedicarboxylic acid, dibasic acid And alcohol (straight or side chain having 1 to 18 carbon atoms, substituted or unsubstituted, saturated or unsaturated alcohol, alkoxy alcohol, or cycloalkyl having 5 to 18 carbon atoms, arylalkyl,
Aryl, alkylaryl hydroxy compounds, etc.), benzoic acid, methylbenzoic acid, tert-butylbenzoic acid, cinnamic acid, salicylic acid, naphthenic acid, rosin acid, phenol, cresol, xylenol, ethylphenol, Examples include tert-butylphenol, octylphenol, nonylphenol, dinonylphenol, p-cumylphenol and phenylphenol. The amount of the metal salt of these organic acids added is 0.01 to 10 parts by weight, preferably 0.01 to 5 parts by weight, based on 100 parts by weight of the vinyl chloride resin.

Specific examples of the epoxy compound include epoxidized soybean oil, epoxidized linseed oil, epoxidized lard oil,
Epoxidized tallow oil, epoxidized cottonseed oil, epoxidized safflower oil, epoxidized whale oil, epoxidized tall oil, epoxidized sunflower oil, epoxidized fish oil, diacet monoglyceride of epoxidized soybean oil, epoxidized diacet monoolein, epoxy stearin Benzoyl acid, butyl epoxy stearate, cyclohexyl epoxy stearate, dihydrononyl epoxy stearate, 2-ethylbutyl epoxy stearate, methoxyethyl epoxy stearate, isodecyl epoxy stearate, isooctyl epoxy stearate, tetrahydrofuryl epoxy stearate, epoxy stearin Phenyl acid,
Acetoxyethyl epoxystearate, butyl, n-octyl, isooctyl and 2
-Ethylhexyl ester, Epoxytriacetomonoricinoleic acid glyceride, Epoxystearic acid-t-
Butylphenyl, 9,10-epoxystearic acid ester of 3,4-epoxycyclohexylmethanol, epoxystearyl benzoate, 9,10,12,13-diepoxystearic acid ester of 3,4-epoxycyclohexylmethanol, 3, 2-Epoxycyclohexylcarboxylic acid 2-ethyl-1,3-hexa-diol ester, epoxyhexahydrophthalic acid di-n-butyl, di-n-hexyl, di-2-ethylhexyl, diisooctyl, di-n- Decyl, diisodecyl and n
-Esters such as butyldecyl, 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexanecarboxylate, 3,4-epoxy-6-methylcyclohexanecarboxylate, bis (3,4-epoxy-6)
-Methylcyclohexylmethyl) adipate, a condensate of epichlorohydrin and bisphenol A, di (C ₆ -C)
₁₀ n-alkyl) -4,5-epoxycyclohexane-1,2-dicarboxylate and the like. The amount of these epoxy compounds added is 0.01 to 40 parts by weight, preferably 0.1 to 100 parts by weight of the vinyl chloride resin.
-20 parts by weight.

Specific examples of the organic phosphite of the present invention include triphenyl phosphite, tricresyl phosphite,
Triisooctyl phosphite, tridecyl phosphite, tri-2-ethylhexyl phosphite, trisnonylphenyl phosphite, tri (octylphenyl)
Phosphite, triscyclohexyl phenyl phosphite, tricyclohexyl phosphite, tridecyl thiophosphite, triisodecyl thiophosphite, phenyl di-2-ethylhexyl phosphite, phenyl diisodecyl phosphite, phenyl dicyclohexyl phosphite, phenyl・ Diisooctyl phosphite, phenyl di (tridecyl) phosphite, phenyl di-cyclohexyl phosphite, diphenyl isooctyl phosphite, diphenyl 2-ethylhexyl phosphite, diphenyl isodecyl phosphite, diphenyl cyclohexylphenyl Phosphite, diphenyl tridecylthiophosphite, nonylphenyl di (tridecyl) phosphite, phenyl p-t-butyl Dodecyl phosphite, diisopropyl phosphite, monoisopropyl phosphite, diisodecyl phosphite, diisooctyl phosphite, monoisooctyl phosphite, didodecyl phosphite, monododecyl phosphite, dicyclohexyl phosphite, monocyclohexyl phosphite, dicyclohexylphenyl Phosphite, monocyclohexylphenylphosphite, di (pt-butylphenyl) phosphite, tetra (tridecyl) -4,4'-
Isopropylidene diphenyl-diphosphite, tetra (tridecyl) -4,4'-butylidene bis (2-t-
Butyl-5-methylphenyl) diphosphite, tetraisooctyl [4.4'-thiobis (2-t-butyl-
5-methylphenyl)] diphosphite, tetranonylphenyl polypropylene glycol-diphosphite,
Tetra (tridecyl) dipropylene glycol diphosphite, tetratridecyl-4,4'-isopropylidene cyclohexyl diphosphite, pentakis (nonylphenyl) bis polypropylene glycol triphosphite, heptakis (nonylphenyl) tetrakis polypropylene glycol pentaphosphite, Heptakis (nonylphenyl) tetrakis (bisphenol A) pentaphosphite, decaquis (nonylphenyl) heptakis (dipropylene glycol) octaphosphite,
Decaphenylheptadipropylene glycol octaphosphite, tetrakis (isooctoxycarbomethylenethio) 1,2-oxycarbonylmethylenethioethylene diphosphite, dibutoxycarboethylenethio (pentaerythritol tetrathioglycol) diphosphite, diisooctoxy Carbomethylenethio (pentaerythritol tetrathioglycol) diphosphite, tetrakis (mercaptolauryl) 1,2-dimercapto-ethylene diphosphite, tetrakis (mercaptolauryl) 1.6-dimercapto-hexylene diphosphite, tetrakis (mercaptolauryl) β, β'-dimercapto-ethyl ether diphosphite, pentakis (dodecyl-mercapto) bis (1,6-hexylene dimercapto) tri Sufaito, diphenyl phosphite, hydrogenated 4,4'-isopropylidene diphenyl phosphite, 4,4'-isopropylidene diphenyl alkyl _(C 12 _{~C 15)} phosphite, 2-t-butyl-.alpha. (3-t- Butyl-4-hydroxyphenyl) p-
Cumenyl bis (p-nonylphenyl) phosphite,
4,4'-butylidene bis (3-methyl-o-t-butylphenyl) ditridecyl phosphite, distearyl pentaerythritol diphosphite, triscyclohexylphenyl phosphite, 1,1,3-tris [(2'-methyl -4'-ditridecyl phosphite 5
'-T-Butyl) phenyl] butane, trisdodecylmercaptophosphite, decaphenylheptadipropylene glycol octaphosphite, dibutylpentaerythritol diphosphite, didecylpentaerythritol diphosphite, dioctylpentaerythritol diphosphite, bis ( 2,4-di-t-butylphenyl) pentaerythritol phosphite and the like.

As the phenolic antioxidant of the composition of the present invention, a poly (alkylphenol) bonded through a hindered phenol, alkylene or alkylidene,
It is a compound containing a phenol derivative such as poly (alkylphenol) bound through sulfur, and specific examples thereof include 2,5-di-t-butylhydroquinone, butylated hydroxyanisole and 2,6-di-t-butyl. -4-
p-cresol, 2,6-di-t-butyl-4-hydroxymethylphenol, 2,6-di-t-butyl-p-
Phenylphenol, n-octadecyl-β- (4-hydroxy-3,5-di-t-butylphenyl) propionate, 2,2′-isopropylidenebisphenol,
2.2'-methylenebis (4-methyl-6-nonylphenol), 2,2'-methylenebis [6- (1-methylcyclohexyl)]-p-cresol, 2,2'-ethylidenebis (4,6-di) -T-butylphenol),
4,4'-methylenebis (2,6-di-t-butylphenol), 4,4'-isopropylidenebis (2-t-)
Butylphenol), 4,4'-butylidenebis (6-
t-butyl-m-cresol), 1,1,3-tris (2-methyl-4-hydroxy-5-t-butylphenyl) butane, 1,3,5-trimethyl-2,4,6-tris ( 3,5-di-t-butyl-4-hydroxybenzyl) benzene, tetrakis [methylene-3- (3,5-
Di-t-butyl-4-hydroxyphenyl) propionate] methane, tetrakis (2,4-di-t-butylphenyl) -4,4′-bisphenylenediphosphite,
Triethylene glycol bis [(3-t-butyl-4-
Hydroxy-5-methylphenyl) propionate],
2,2'-thiobis (4-methyl-6-t-butylphenol), 4,4'-thiobis (6-t-butyl-m-
Cresol), 4,4'-thiobis (6-t-butylphenol), bis (3-methyl-4-hydroxy-5-)
t-butylbenzyl) sulfide, and the like. These phenolic antioxidants are added in an amount of 0.001 to 10 parts by weight based on 100 parts by weight of the vinyl chloride resin,
It is preferably 0.001 to 5 parts by weight.

Specific examples of the β-diketone compound of the composition of the present invention include diacetylmethane, triacetylmethane,
2,4,6-heptatrione, butanoylacetylmethane, lauroylacetylmethane, palmitoylacetylmethane, stearoylacetylmethane, phenylacetylacetylmethane, dicyclohexylcarbonylmethane, benzoylformylmethane, benzoylacetylmethane, dibenzoylmethane, octylbenzoylmethane , Bis (4-octylbenzoyl) methane, benzoyldiacetylmethane, 4-methoxybenzoylbenzoylmethane, bis (4-carboxymethylbenzoyl) methane, 2-carboxymethylbenzoylacetyloctylmethane, dehydroacetic acid, cyclohexane-1,3-dione , Methyl 3,6-dimethyl-2,4-dioxycyclohexane-1carboxylate, 2-acetylcyclohexanone, dimedone, 2- It may indicate emissions benzoyl cyclohexane. The metal salt of a β-diketone compound means the above β-
A diketone compound and a Group Ia metal such as lithium, sodium and potassium, a Group IIa metal such as magnesium, calcium, strontium and barium, and a metal salt such as zinc, aluminum, tin and alkyltin. These β-
The addition amount of the diketone compound is 0.001 to 10 parts by weight, preferably 0.1 part by weight with respect to 100 parts by weight of the vinyl chloride resin.
001 to 5 parts by weight.

The stabilizer composition of the present invention may contain one or more other stabilizers or additives generally used. For example, organic phosphate ester,
Organotin compounds, organic or inorganic antimony compounds, organic or inorganic titanium compounds, processing aids, impact resistance agents, lubricants, fillers, UV absorbers, pigments, dyes, plasticizers, organic compounds or salts thereof, release agents , Antistatic agents, polyhydric or higher alcohols, saturated or unsaturated fatty acids with straight or side chains,
Other organic solvents, flame retardants, fragrances, cross-linking agents, anti-plateout agents, etc.

Specific examples of the organic phosphoric acid ester include nonylphenoxypolyethoxyphosphoric acid, tridecylhydroxypolyethoxyphosphoric acid, octyloxypolyethoxyphosphoric acid, lauryloxypolyethoxyphosphoric acid, stearyloxypolyethoxyphosphoric acid and oleyl. Oxypolyethoxyphosphoric acid, t-butylphenoxypolyethoxyphosphoric acid, octylphenoxypolyethoxyphosphoric acid, dinonylphenoxypolyethoxyphosphoric acid, dodecylphenoxypolyethoxyphosphoric acid, diphenyl-2-ethylhexylphosphoric acid, monostearyl phosphate zinc salt , Distearyl phosphate zinc salt and the like.

Specific examples of the organic tin compound include mono (or di) methyl tin tris (or bis) (isooctyl thioglycolate) and mono (or di) octyl tin tris (or bis) (isooctyl thioglycolate). ), Mono (or di) butyltin tris (or bis) (isooctylthioglycolate), mono (or di) methyltin tri (or di) laurate, mono (or di) butyltin tri (or di) laurate, Mono (or di) octyltin tri (or di) laurate, Mono (or di) methyltin tris (or bis) (isooctylmalate), Mono (or di) butyltin tris (or bis) (isooctylmalate ), Mono (or di) octyltin tris (or bis) (isooctyl maleate), mono (or di) butyltin tris (or bis) (methoxybutyrate) Thioglycolate), mono (or di) octyl tin tris (or bis) (methoxybutyl thioglycolate), mono (or di) alkyl (C
_1-12 ) tin tris (or bis) (2-mercaptoethyl oleate), mono (or di) alkyl ( _C1-12 )
Tin tris (or bis) (2-mercaptoethyl oleate) sulfide, mono (or di) alkyl (C
_1-12 ) Tin tri (or di) oleate, mono (or di)
Alkyl ( _C1-12 ) tin sulfide, mono (or bis) (butyl acrylate) tin tris (or bis) (isooctyl thioglycolate), mono (or bis) (methyl acrylate) tin tris (or bis) (Isooctylthioglycolate), mono (or di) alkyl (C
_1-12 ) tin oxide, mono (or di) methyl tin maleate polymer, mono (or di) butyl tin malate polymer, mono (or di) octyl tin maleate polymer, mono (or di) alkyl (C _{1 12} ) tin-β-mercaptopropionate, mono (or di) alkyl (C _1-12 ) tin thioglycolate, mono (or di) alkyl (C _1-12 ) tin tri (or di) mercaptoethanol mono ( Or di) alkyl (C _1-12 ) tin tri (or di) ricinoleate, mono (or di) alkyl (C
_1-12 ) Tin tri (or di) oleate, mono (or di)
Alkyl (C _1-8 ) tin tri (or di) chloride, 2
-Reaction products obtained from mercaptoethyl fatty acid esters and sodium sulfide and caustic soda.

Specific examples of organic or inorganic antimony compounds include tris (isooctylthioglycolate) antimony, monobutylantimony bis (isooctylthioglycolate), dibutylantimony mono (isooctylthioglycolate), tris (2 -Mercaptoethyl oleate) antimony, antimony trioxide and the like.

Examples of organic or inorganic titanium compounds are tetrastearyl titanate, tetrakis (2-ethylhexyl) titanate, isopropyl isostearyl titanate, diisopropoxy bis (acetylacetone) titanate, tributoxy monostearyl titanate, dihydroxy bis (lactic acid). ) Titanate, isopropyltridecylbenzenesulfonyl titanate, isopropyl tris (dioctyl pyrophosphate) titanate, tetraisopropyl bis (dioctyl phosphite) titanate, tetraoctyl bis (ditridecyl phosphite) titanate, tetra (2,2-diallyloxymethyl-) 1-butyl) bis (ditridecyl phosphite) titanate, bis (dioctyl pyrophosphate) oxya Tate titanate, tris (dioctyl pyrophosphate) ethylene titanate, (mono or di) butyl titanium (tri or di) laurate, (mono or di) butyl titanium (tris or bis) isooctyl thioglycolate, tetrakis (isooctyl thioglycol) Rate) titanium, tetrakis (dodecyl mercaptoate) titanium, titanium dioxide and the like.

Specific examples of the processing aid and the impact resistance enhancer include chlorinated polyethylene, ethylene propylene copolymer, ethylene vinyl acetate copolymer, styrene butadiene copolymer, acrylonitrile styrene copolymer, acrylonitrile butadiene styrene copolymer. And acrylic acid butadiene styrene copolymer, methacrylic acid butadiene styrene styrene copolymer (MBS), polystyrene, acrylic resin and the like. Specific examples of lubricants include polyethylene wax, paraffin wax derived from petroleum or coal, higher fatty acids, higher alcohols, naturally-occurring or synthetic polymer ester waxes, ethylene bis-stearamide, and lubricity other than the above-mentioned metallic soaps. For example, metal salts.

Examples of the filler include calcium carbonate,
Calcium oxide, calcium hydroxide, zinc oxide, zinc hydroxide, zinc carbonate, zinc sulfide, magnesium oxide, magnesium hydroxide, magnesium carbonate, aluminum oxide,
Aluminum hydroxide, alumina sodium silicate, hydrotalcite, hydrocalumite, aluminum silicate, magnesium silicate, calcium silicate, zeolite and other metal silicates, activated clay, talc, clay, red iron oxide, asbestos, trioxide Antimony and the like.

Specific examples of organic compounds or salts thereof include 2-phenylindole, diphenylthiourea, cetyl and stearyl β-aminocrotonic acid esters, 1,
Nitrogen-containing compounds such as 3 and 1,4-butanediol bis β-aminocrotonate, thiodiethylene glycol bis β-aminocrotonate, isocyanuric acid and derivatives thereof such as tris (2-hydroxyethyl) cyanurate, pentaerythritol, Polyhydric alcohols such as mannitol and sorbitol, benzoic acid, methylbenzoic acid, linoleic acid, maleic acid, cinnamic acid, pt
-Carboxylic acid such as butylbenzoic acid and crotonic acid, boric acid ester, thiodiglycolic acid ester, pentaerythritol tetrakis (mercaptopropionate), pentaerythritol tetrakis (mercaptoacetate), dicyandiamide, tannin, oxalic acid ester, malonic acid ester , 2- (3'-methoxy-4'-
Hydroxyphenyl) indole, dilauryl thiodipropionate, thiodipropionate such as distearyl thiodipropionate, 6-anilino-1,
3,5-triazine-2,4-dithiol, 6-butylamino-1,3,5-triazine-2,4-dithiol melamine, 2-mercaptoethyloleate, octylthioglycolate, 2-mercaptoethanol, β- Examples thereof include mercaptopropionic acid, thioglycolic acid, hexamethylenetetramine, and hindered amine compounds.

[0020]

EXAMPLE The following example shows the stabilizing effect of the vinyl chloride resin according to the present invention. Example 1 100 parts by weight of vinyl chloride resin and 50 parts of tetrahydrofuran
The additive shown in Table 1 was well dispersed in 0 part by weight, poured on a glass plate with a constant thickness, and then cured for 5 minutes in an oven at 180 ° C. to give a polyvinyl chloride resin composition sheet of 0.3 mm. Created. The thermal stability result was evaluated by measuring the deterioration status of this sheet in a gear oven at 180 ° C. for 120 minutes over time. This sheet 180
It was pressed at 5 ° C. for 5 minutes to evaluate the light resistance of the germicidal lamp. Table 1 shows the test results. The evaluation values in the table are
It was evaluated on a 10-point scale. (Example: Excellent 10 → 1 Inferior)

Example 2 Various additives shown in Table 2 were added to the following basic composition, dry blended, and kneaded with a mixing roll at 180 ° C. for 5 minutes to prepare a 0.5 mm sheet. Each sheet piece 1
A gear oven test was performed under the condition of 80 ° C. to check the thermal stability. Further, a press sheet was prepared under the condition of 180 ° C. × 5 minutes, and the light resistance by a germicidal lamp was observed. Basic formulation Vinyl chloride resin 100 parts by weight Dioctyl phthalate 50 parts by weight Table 2 shows the test results. The evaluation value in the table is 10
It was evaluated on a scale. (Example: Excellent 10 → 1 Inferior)

Example 3 Various additives shown in Table 2 were blended with the following basic formulation, dry blended, and kneaded with a mixing roll at 180 ° C. for 5 minutes to prepare a 0.5 mm sheet. Each sheet piece 1
A gear oven test was performed under the condition of 80 ° C. to check the thermal stability. Further, a press sheet was prepared under the condition of 180 ° C. × 5 minutes, and the light resistance by a germicidal lamp was observed. Basic formulation Vinyl chloride resin 100 parts by weight Diisononyl adipate 40 parts by weight Epoxidized soybean oil 2 parts by weight Trisnonylphenyl phosphite 0.5 parts by weight Table 3 shows the test results. The evaluation value in the table is 10
It was evaluated on a scale. (Example: Excellent 10 → 1 Inferior)

Example 4 Various additives shown in Table 2 were added to a chlorinated vinyl chloride resin,
After dry blending and kneading with a mixing roll at 190 ° C. for 5 minutes, a 0.5 mm sheet was prepared. Each piece of the sheet was tested at 180 ° C in a gear oven,
The heat resistance was low. Further, a press sheet was prepared under the condition of 180 ° C. × 5 minutes, and the light resistance by a germicidal lamp was observed. The results of these tests are shown in Table 4. The evaluation values in the table were evaluated on a scale of 10. (Example: Excellent 10 → 1 Inferior)

As is apparent from the above examples, it is recognized that the use of trehalose in combination provides excellent heat stability and light resistance.

[0024]

[Table 1]

[0025]

[Table 2]

[0026]

[Table 3]

[0027]

[Table 4]

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Claims (3)

[Claims] 1. A vinyl chloride resin stabilizing composition comprising trehalose in a vinyl chloride resin. 2. A vinyl chloride resin stabilizing composition comprising a vinyl chloride resin containing (a) trehalose and (b) at least one metal salt of an organic acid. 3. A vinyl chloride resin containing (a) trehalose and (b) at least one metal salt of an organic acid, and (c) an epoxy compound, an organic phosphite, a phenolic antioxidant, and β. -A vinyl chloride resin stabilizing composition comprising at least one diketone compound.