WO2003085041A1

WO2003085041A1 - Stabilizer for resin and thermoplastic resin composition

Info

Publication number: WO2003085041A1
Application number: PCT/JP2003/004324
Authority: WO
Inventors: Naoki Yasuda; Hiroshi Yokota
Original assignee: Ajinomoto Co., Inc.
Priority date: 2002-04-05
Filing date: 2003-04-04
Publication date: 2003-10-16
Also published as: AU2003221018A1

Abstract

A stabilizer for thermoplastic resins which comprises an alkylated glucoside; and a thermoplastic resin composition which comprises a thermoplastic resin composition and, incorporated therein, either the alkylated glucoside or a combination thereof with a calcium-zinc type and/or barium-zinc type stabilizer and which further contains an inorganic acid scavenger such as hydrotalcite, a dolomite compound, or the hydroxide or oxide of an alkaline earth metal. This composition has significantly improved thermal stability. Also provided is a molded object of the thermoplastic resin composition.

Description

" Specification

Stabilizer for resin and thermoplastic resin composition

Technical field

The present invention relates to a stabilizer for a thermoplastic resin composition, a thermoplastic resin composition having good thermal stability, and a molded product thereof.

'' Background technology

Using a thermoplastic resin, for example, by kneading and molding, resin moldings are used to mold resin moldings, such as automotive parts such as bumper products and instrument panels, electric parts such as computer housings, insulation materials and pipes. It is used in many fields as building materials.

Conventionally, when manufacturing these resin molded products and molded products, kneading is performed while heating, but there is a problem in heat aging resistance in terms of coloring that occurs and a decrease in resin strength. there were. Therefore, in order to prevent this, zinc chloride, tin, and lead stabilizers have been added to vinyl chloride resins, and antioxidants have been added to thermoplastic resins such as polyolefin resins and polystyrene resins. (See Table 1 · 2–1 on page 1 of the “Antioxidant Handbook”, Taiseisha, first edition issued on October 25, 1978). Chlorine-containing resins such as vinyl chloride resin are inexpensive and have excellent physical properties such as durability, so they can be used in various applications such as water pipes, building materials, electric wire coating materials, daily necessities, furniture, toys, automobiles, home appliances, medical infusion tubes, etc. Used in the field. Generally, chlorine-containing resins are easily degraded by heat or light as they are, so lead-based, tin-based, and zinc-based stabilizers are used as described above. The transition from lead to tin and zinc is progressing. However, in a butyl resin-based resin composition containing a zinc-based stabilizer, once the degradation starts, zinc chloride is formed, and this zinc chloride serves as a catalyst that promotes the degradation of the resin. Causes burning phenomenon. It has been known that the addition of polyhydric alcohol-based stabilizers has been effective to suppress this.It is presumed that multiple hydroxyl groups in the polyhydric alcohol molecule are inactivated by chelating zinc chloride. ing. Examples of these polyhydric alcohol-based stabilizers include polyhydric alcohols such as pentaerythritol and dipentaerythritol, and polyhydric alcohols for improving compatibility with resins. Partially esterified with an acid (JP-A-55-69639, JP-B-57-61289, U.S. Pat. No. 4,220,806; (See Japanese Patent Publication No. 61-477686). Further, as a production method in which plate-out and sublimation are suppressed, JP-A-8-143704 discloses that a polyhydric alcohol is esterified with a dibasic acid, and the remaining hydroxyl groups are condensed to improve the stabilization performance. Has improved. However, the stabilizers produced by these methods were not satisfactory in terms of stabilization performance, and further improvement was required.

For general-purpose thermoplastic resins such as polyolefin resin, polystyrene resin, polyester resin, and polyamide resin, phenol-based, phosphorus-based, amine-based, and sulfur-based antioxidants are added. Force preventing coloration and decrease in resin strength These antioxidants have poor dispersibility, and when added in a large amount, not only are they unable to sufficiently exert their anti-coloring properties, but also reduce resin strength. And it is not economical.

Other methods include using fatty acid metal stones such as fatty acids and fatty acid calcium salts, and additives commonly used as lubricants such as fatty acid amides, but these methods have a sufficient dispersing effect. And bleed-out from the resin molded product is easy. For the purpose of improving the heat aging resistance, it has been known to use a condensation product of a polycondensation product of polyglycerin and hydroxycarboxylic acid: polyester (Japanese Patent Application Laid-Open No. 08-320265). However, it is not always satisfactory in terms of heat aging resistance. It has also been reported that a composition in which a polyglycerin fatty acid ester is blended with an inorganic filler in a thermoplastic resin can improve the impact resistance and the weather resistance (Japanese Patent Laid-Open No. 4-224249). The heat aging resistance has not been sufficiently improved.

Furthermore, thermostable polyolefins composed of polyolefins, inorganic fillers, hindered phenolic antioxidants, sulfuric acid antioxidants, and esters of fatty acids (lauric acid, palmitic acid, stearic acid, etc.) of neopentyl-type polyhydric alcohols Composition (European Patent Application Publication No. 326627; Japanese Patent Publication No. 61-46015), polyolefin resin, filler and esterified product of dipentaerythritol To produce a porous sheet by stretching the sheet obtained by melt molding Method (US Pat. No. 5,073,166; see Japanese Patent Publication No. 7-5781), an inorganic filler for a synthetic resin obtained by coating an inorganic compound powder with a polyhydric alcohol and a fatty acid ester (US Pat. No. 4,126,593; Japanese Patent Application Laid-Open No. 52-49254), a plastic composition containing a carrier and a fatty acid polyol type ester in a synthetic resin (Japanese Patent Application Laid-Open No. 52-144048), a polyolefin resin. A polyolefin resin composition containing an inorganic powder and an ester obtained by reacting a trihydric to tetrahydric aliphatic alcohol with a fatty acid and an aliphatic dibasic acid in substantially equivalent amounts (JP-A-64-90234) Gazettes) have been proposed, but the heat aging resistance has not necessarily been sufficiently improved.

Further, a thermoplastic resin containing a thermoplastic resin, a polyglycerol fatty acid ester, an antioxidant, a filler, and the like has been proposed as a material for improving heat aging resistance (European Patent Application No. 0908491). Power The effect is not enough. As is clear from the conventional techniques described above including the above problems and problems, additives that can improve the heat aging resistance while maintaining or expressing other excellent physical properties when molding a thermoplastic resin. Alternatively, there is a need to provide a thermoplastic resin composition.

Disclosure of the invention

As a result of intensive studies, the present inventors have found that alkylated dalcoside is a polyhydric alcohol-based stabilizer having an excellent performance balance, and have completed the present invention.

That is, the present invention is as follows.

(1) A stabilizer for a thermoplastic resin comprising an alkylated dalcoside.

(2) The thermoplastic resin stabilizer according to the above (1), wherein the alkylated dalcoside is an alkylated glucoside having an acylated hydroxyl group in a glucose skeleton.

(3) The thermoplastic resin stabilizer according to the above (1) or (2), wherein the alkylated darcoside is lauryl darcoside.

(4) A stabilizer composition for a thermoplastic resin containing an alkylated dalcoside.

(5) A stabilizer composition for thermoplastic resin, comprising (A) an alkylated dalcoside, and (B) an acid M scavenger.

(6) 1 part by weight of (A) alkylated darcoside, (B) acid scavenger 0.1 to 1 The stabilizer composition for a thermoplastic resin according to the above (5), containing 00 parts by weight.

(7) A stabilizer composition for a thermoplastic resin, comprising (A) an alkylated dalcoside, (B) an acid scavenger, and (C) a calcium-zinc-based and / or barium-zinc-based stabilizer.

(8) For (A) 1 part by weight of alkylated darcoside, (B) 0.1 to 100 parts by weight of an acid scavenger, (C) Calcium-zinc based and / or barium-zinc based stabilizer 0.1 The stabilizer composition for a thermoplastic resin according to the above item (7), which contains about 100 parts by weight.

(9) The acid scavenger according to any one of (5) to (8), wherein the acid scavenger is at least one selected from hydrotalcite, dolomite-based compounds, hydroxides or oxides of alkaline earth metals. Stabilizer composition for thermoplastic resin.

(10) The stabilizer composition for a thermoplastic resin according to any one of the above (4) to (9), wherein the alkylated glucoside is lauryl glucoside.

(1 1) (D) a thermoplastic resin, and (E) the stabilizer for any one of the above (1) to (3) or the heat of any one of the above (4) to (10). A thermoplastic resin composition containing a stabilizer composition for a plastic resin. .

(E) The stabilizer for thermoplastic resin according to any one of (1) to (3) or the stabilizer for (4) to (10) based on 100 parts by weight of (D) thermoplastic resin. (11) The thermoplastic resin composition according to the above (11), which contains 0.05 to 10 parts by weight of the stabilizer composition for thermoplastic resin as an alkylated darcoside in an amount of 0.05 to 10 parts by weight.

(13) The thermoplastic resin according to (11) or (12), wherein the thermoplastic resin is at least one selected from a chlorine-containing resin, a polyolefin-based resin, a polystyrene-based resin, a polyester-based resin, and a polyamide-based resin. Resin composition.

(14) A molded product obtained by molding and processing the thermoplastic resin composition according to any one of (11) to (13).

The stabilizer for a thermoplastic resin comprising the alkylated dalcoside of the present invention improves the thermal stability of the thermoplastic resin containing the stabilizer, so that the coloring of the molded product due to thermal deterioration is remarkably suppressed.

This effect is considered to be exhibited by the following mechanism.

That is, the alkylated darcoside used in the present invention contains a hydrophobic alcohol in the molecule. Since it has a kill group and multiple hydroxyl groups, it acts as a surfactant and improves the dispersibility of stabilizers such as antioxidants added to improve thermal stability, thereby improving the performance of resin molded products It is considered something. In addition, particularly in the case of a polyolefin resin, a trace amount of a metal component derived from a filler or a metal catalyst at the time of production may cause deterioration of the resin. However, the alkylated dalcoside molecule chelates the metal component and inactivates the metal component. It is thought that it is doing.

In the case of a chlorine-containing resin, particularly when a zinc-based stabilizer is used, it is necessary to inactivate the active zinc chloride generated as described above to prevent zinc burning, but use an alkylated dalcoside. If so, it is considered that multiple hydroxyl groups in the alkylated dalcoside molecule coordinate with zinc chloride and inactivate it. In this case, a higher stabilizing effect can be obtained by using an acid scavenger in combination so that the generated hydrochloric acid does not decompose each bond in the alkylated dalcoside molecule.

BEST MODE FOR CARRYING OUT THE INVENTION

The alkylated dalcoside, which is a stabilizer of the present invention, is one in which the hydroxyl group of glucose alone or polydarcoside in which 2 to 10 darcose molecules are condensed by darcoside bonds is alkylated by an ether bond. The free hydroxyl group bonded to the glucose skeleton in the alkylated glucoside may be further acylated by an ester bond.

Assuming that the number of hydroxyl groups in glucose or polydarcoside is n, the total number of alkylated and acylated hydroxyl groups is preferably n_1 or less, more preferably 2/3 or less of n. The ability to deactivate metals or metal compounds that are the causative agents of the resin decreases, and the thermal stability of the resin decreases. The number of carbon atoms in the alkylated portion is not particularly limited, but is preferably an alkyl group of 4 to 24 from the viewpoint of compatibility with the resin and economical efficiency. For example, octyl, noel, decyl (force prill), pendecyl, Linear and branched, such as dodecyl (lauryl), tridecyl, tetradecyl (myristyl), pentadecyl, hexadecyl, heptadecyl, octadecinole (stearyl), nonadecyl, eicosyl, 1-methyl-hexyl, 1-butyl-hexyl A chain alkyl group having 8 to 20 carbon atoms is particularly preferred. If it is smaller than this, the compatibility with the resin deteriorates and the thermal stability decreases. It is difficult to obtain. As the acyl group, those having 4 to 24 carbon atoms derived from saturated / unsaturated fatty acids are preferred. Those having 8 to 20 carbon atoms are particularly preferred.

These alkylated darcosides are produced, for example, by hydrolyzing starch and alkylating a hydroxyl group with an aliphatic alcohol, and are also commercially available.

The acid scavenger contained in the stabilizer composition of the present invention is not particularly limited as long as it can neutralize or adsorb an inorganic or organic acid such as hydrochloric acid which is generated in the resin and causes deterioration. From the viewpoint of the effect of imparting stability and versatility, preferably, the talcite at the mouth, an alkali metal compound such as an alkali metal hydroxide, oxide or carbonate, a hydroxide or oxide of an alkaline earth metal Or alkaline earth metal compounds such as carbonates, and calcium-magnesium acid scavengers which are a mixture of double salts and salts thereof, such as hydroxides, hydroxides and oxides of hydrotalcite, magnesium or calcium. Or carbonates and dolomite compounds such as dolomite, calcined dolomite, and slaked lime, which are mixtures of double salts of these, calcium-magnesium acid scavenging Agent is more preferable.

The amount of the alkylated glucoside to be added is 0.1 to 100 parts by weight with respect to 1 part by weight of the alkylated glucoside. If the amount is smaller or larger, the synergistic effect of the resin stabilization by the addition becomes smaller. A particularly preferred range is about 0.2 to 50 parts by weight per 1 part by weight of the alkylated darcoside.

The calcium-zinc-based or Z- and zinc-based zinc-based stabilizers contained in the stabilizer composition of the present invention may be the usual ones used for polyvinyl chloride-based resins. A mixture of a zinc acid salt or a mixture of a barium salt of an organic acid and a zinc salt of an organic acid is preferred. The organic acids include, for example, acetic acid, propion

'' Acid, butyric, valeric, cabronic, octanoic, lauric, stearic,

'' Acid, benzoic, salicylic, oleic, malic, succinic, adipic, phthalic, terephthalic, trimellitic, glutamic, lysine, pyrrolidone Examples thereof include carboxylic acid, aspartic acid, and glycine, and for example, stearic acid is preferred.

The amount of the calcium-zinc-based or barium-zinc-based stabilizer to be added to the alkylated darcoside is 0.1 to 100 parts by weight based on 1 part by weight of the alkylated dalcoside. The synergistic effect of resin stabilization due to is reduced. A particularly preferred range is about 0.2 to 50 parts by weight per 1 part by weight of the alkylated darcoside.

In the stabilizer composition of the present invention, the respective components are mixed in advance and blended into the thermoplastic resin, or the respective components may be separately blended. The thermoplastic resin used in the present invention may be any resin exhibiting thermoplasticity, and may be a chlorine-containing resin such as polyvinyl chloride or polyvinylidene chloride, polyethylene, polypropylene, an ethylene-propylene copolymer, or ethylene copolymer. Polyolefin-based resins such as tinoleacrylate copolymer, ethylene-vinyl acetate copolymer, polycarbonate resins, polyester resins such as polyethylene terephthalate, polybutylene terephthalate, and polybutylene naphthalate, and acrylonitrile butadiene-styrene copolymer Engineers of polymers (ABS resin), polystyrene resins such as polystyrene, polyamide resins such as 6 nylon and 66 nylon, polyphenylene ether, polyphenylene sulfide, polyether ether ketone, etc. Ing plastics, other can Rukoto mentioned thermoplastic resins that can be used in the field of composite materials, it can be used in combination the plurality of resins. Among these, chlorine-containing resins and polyolefin-based resins are preferable, and chlorine-containing resins are particularly preferable, from the viewpoint that the effect of the polyhydric alcohol-based stabilizer is large.

Chlorine-containing resins include, for example, homopolymers such as polyvinyl chloride and polyvinylidene chloride, as well as copolymers of butyl chloride and other olefin compounds, and polyolefin resins include high-pressure low-density polyethylene, Ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, high-density polyethylene, medium-density polyethylene, gas-phase linear low-density polyethylene, gas-phase ultra-low-density polyethylene, high-crystalline ethylene Propylene copolymer, ethylene-propylene-one-gen rubber, isobutylene-isoprene rubber, polypropylene, polybutene-one And the like, and one or more of these can be used as a mixture.

In the present invention, the amount of the thermoplastic resin stabilizer or the stabilizer composition contained in the thermoplastic resin composition is from 0.05 to 100 parts by weight of the thermoplastic resin as alkylated dalcoside. 10 parts by weight, preferably about 0.1 to 5 parts by weight. Further, the thermoplastic resin composition of the present invention may further contain other additives, if necessary, such as a stabilizer other than a calcium-zinc-based or barium-zinc-based stabilizer, as long as the characteristics of the present invention are not impaired. Or inorganic fillers, organic or inorganic pigments, dyes, plasticizers, lubricants, foam stabilizers, foaming agents, flame retardants, antioxidants, ultraviolet absorbers, light stabilizers, antistatic agents, nucleating agents Species or a combination of two or more can be added.

Stabilizers other than calcium-zinc-based and pallidum-based zinc stabilizers include tin-based or polyhydric alcohol-based stabilizers, particularly erythritol-based compounds such as pentaerythritol and dipentaerythritol, pentaerythritol or dipentaerythritol The use of a conventional polyhydric alcohol-based stabilizer such as a polyol ester compound such as adipic acid ester is useful from the viewpoint of stabilizing a thermoplastic resin.

As fillers, fibers such as glass fiber, carbon fiber, metal fiber, etc., sand, calcium stone, carbon black, graphite, titanium oxide, iron oxide black, zinc yellow, bengalara, ultramarine violet, zinc green, oxidation Pigments such as iron yellow, synthetic silicate, chalk, calcium carbonate, calcium sulfate, calcium hydroxide, barium sulfate, clay, talc, silica, wollastonite, calcium silicate, gypsum, aluminum powder, zinc powder, lead _{_{suboxide, MO · F e 2 0 3}} (M is B a, S r, C a , M g, Z n, 1 or more kinds of P b) ferrite magnetic powder consisting of or lead, etc., Examples of facial medicine include oxides, sulfides, or sulfates of various metals, and examples of dyes include phthalocyanine, quinatalidone, and benzidine-based dyes. Phthalates, phosphates, adipates, or epoxies, and lubricants include fatty acids, fatty acid metal stones, or fatty acid amides, and foam stabilizers. As silicone oil or higher aliphatic alcohols, as azobisisobutyronitrile as foaming agent, and as flame retardant Halogen compounds, phosphorus compounds, antimony trioxide, hydroxides such as magnesium hydroxide / aluminum hydroxide, etc., and antioxidants such as hydroquinone type, fuanol type, phosphorus type, amine type or sulfur type compounds Benzophenone, salicylate, and benzotriazole compounds as ultraviolet absorbers or light stabilizers, and anionic, cationic or nonionic activators, and amphoteric activators as antistatic agents. Or a mixture of activators, and examples of the nucleating agent include adipic acid and sodium benzoate.

Example

Next, the present invention will be described in detail with reference to Examples and Comparative Examples. The following examples are not intended to limit the scope of the present invention, but to explain the content of the present invention more specifically.

(Example 1) Production of thermoplastic resin composition and resin molded product 1

Lauryl darcoside 50% aqueous solution (manufactured by Cognis Japan K.K., Plantacare 1200UP) was dried to remove water, and lauryl darcoside (hereinafter referred to as "lauryl darcoside 100% product") 0.02 kg, Talc (Matsumura Sangyo, High ♦ Filler # 5000 PJ, average particle size 1.4 ~ 1.8μπι) 2 kg, and 110 ° (, highly crystalline ethylene-propylene copolymer resin (pre-dried for 5 hours)巿 Using unstabilized resin for sale) Mix 10 kg (1 720 rpm, 5 minutes), knead with a twin-screw kneader (Ikegai, PCM30Z30 type) (cylinder temperature; C 1 = 100, C 2 = 220, C3 = 210, C4 = 210, C5 = 20, AD (adapter temperature) = 220, screw speed = 250 rpm, discharge rate = 8 kgZ hour), pelletized Using the resulting pellets, a flow test (melt flow) was carried out in accordance with JISK 7210. Injection molding machine (Clockner F85, Nippon Steel Works, Cylinder temperature; Nozzle = 220 ° C, front = 220 ° C, center = 210 ° C, high = 200 ° C) , Injection pressure = 360 kg / cm injection speed

= 20%, mold temperature = 45 ° C), and injection molding was performed in accordance with JISK 7152 to prepare a multipurpose test piece of JISK 7139. A heat aging test was performed in an oven at 150 ° C according to JIS K72 12 to observe changes in appearance.

After 900 hours, the color changed to brown and thermal degradation started. Four

(Comparative Example 1) Production of thermoplastic resin composition and resin molded product 2

100% of lauryl darcoside of Example 1 0.02 kg was replaced with 0.02 kg of dibasic erythritol esters (manufactured by Ajinomoto Fine Techno Co., Inc. A heat aging test was carried out in the same manner as in Example 1 except that the appearance was changed, and changes in the appearance were observed. As a result, the color changed to brown from 65 hours later, and thermal deterioration started.

(Example 2) Production of thermoplastic resin composition and resin molded product 3

Naturally occurring magnesium hydroxide (Purity: 97% by content of Mg (OH) 2, iron content: 175 ppm in terms of iron element, average particle diameter 3 m, manufactured by Steel Pipe Mining Co., Ltd.) 1 25 parts by weight, lauryl darcoside 100. /. 0.5 parts by weight, calcium stearate (Sakai Chemical Co., Ltd.) 1 part by weight, EEA resin (J-REX, Nippon Polyolefin Co., Ltd., ethylene-ethyl acrylate copolymer) 100 Parts by weight were dry-blended and kneaded at 160 ° C for 3 minutes using a heated roll, and the mixture was further dried at 180 ° C. To obtain a 1 mm thick molded product was 4 minutes press molding at C, 100 k gZc i ^2. The molded article was heated in an oven at 180 ° C., visually observed for discoloration, and subjected to a thermal coloring test. As a result, almost no discoloration was observed until 60 minutes later.

(Comparative Example 2) Manufacture of thermoplastic resin composition and resin molded article4, 100% lauryl darcoside of Example 2, 0.5 parts by weight, instead of 0.5 parts by weight, erythritol dibasic acid ester (Ajinomoto Fine Techno Co., Ltd.) A thermal coloring test was performed in the same manner as in Example 2 except that 0.5 part by weight was mixed, and yellowing was observed after 40 minutes. After 0 minutes, the color changed to brown.

(Example 3) Production of thermoplastic resin composition and resin molded product 5

Polychlorinated vinyl resin (100 Z, Shin Daiichi PVC Co., Ltd., degree of polymerization: 100,000) 100 parts by weight, G-2-ethylhexyl phthalate (Kao Co., Ltd. 80) 50 parts by weight, zinc stearate (manufactured by NOF Corporation, GP) 1 part by weight, calcium stearate (manufactured by NOF Corporation, GP) 1 part by weight, calcium-magnesium acid scavenger 5 parts by weight, 50% aqueous solution of lauryl darcoside (manufactured by Ajinomoto Fine Techno Co., Ltd., HC50) (Planta Care 1200 UP, manufactured by Cognis Japan Co., Ltd.) 0.5 parts by weight at 150 ° C After kneading with a heating roll for 5 minutes, The sheet was pressed by a heating press at 155 ° C and 100 kg / cm2 for 5 minutes to obtain a sheet having a thickness of lmm. This kneaded material was heated at 180 ° C. in a gear oven, and after 60 minutes, thermal coloring was visually observed, and no coloring was observed.

(Comparative Example 3) Production of thermoplastic resin composition and resin molded product 6

In the kneading compound of Example 3, 0.5 part by weight of a 50% aqueous solution of lauryl darcoside was replaced with 0.5 part by weight of a polyhydric alcohol-based stabilizer (Pren Lizer ST-210, manufactured by Ajinomoto Fine Techno Co., Ltd.). In the same manner, thermal coloring was visually observed, and the color changed to orange from 40 minutes later and to dark brown after 60 minutes.

(Example 4) Production of thermoplastic resin composition and resin molded product 7

Of the kneading compound of Example 3, 5 parts by weight of a calcium-magnesium acid scavenger and 0.5 part by weight of a 50% aqueous solution of lauryl darcoside were replaced with 0.1 part by weight of a calcium-magnesium acid scavenger. When 0.4 part by weight of a product containing 100% of perylaryl darcoside was blended and the thermal coloring was similarly visually observed, no coloring was observed even after 80 minutes.

(Comparative Example 4) Production of thermoplastic resin composition and resin molded product 8

Of the kneading compound of Example 3, 5 parts by weight of a calcium-magnesium acid scavenger and 0.5 part by weight of a 50% aqueous solution of lauryl darcoside were replaced with 0.1 part by weight of a calcium-magnesium acid scavenger and 0.4 parts by weight of a polyhydric alcohol-based stabilizer (manufactured by Ajinomoto Fine Techno Co., Ltd., Prenlyzer-1 ST-210) was blended, and the thermal coloring was also visually observed. Black spots appeared, and after 70 minutes they turned black due to zinc burning.

(Example 5) Production of thermoplastic resin composition and resin molded product 9

In the kneading mixture of Example 3, 0.5 part by weight of a 50% aqueous solution of lauryl darcoside was replaced by 0.25 part by weight of a 50% aqueous solution of lauryl darcoside, a polyhydric alcohol-based stabilizer (Ajinomoto Fine Techno ( Co., Ltd., Pren riser ST-210)

When 0.25 part by weight was blended and thermal coloring was visually observed in the same manner, no coloring was observed even after 60 minutes.

(Example 6) Production of thermoplastic resin composition and resin molded product 10

1.00 _g (195 mm o 1) lauryl darcoside 100% product used in Example 1, Dissolve 39.5 g (39 Ommo 1) of triethylamine in 300 g of acetone and heat to reflux. A solution of 124.4 g (39 lmmo 1) of stearic acid chloride in 100 g of acetone was added dropwise over 30 minutes, and the mixture was refluxed for 2 hours. Thereafter, the reaction solution was cooled to room temperature, acetone was distilled off with a rotary evaporator, and water and toluene were added at 20 Om 1 each to carry out a liquid separation operation. After the toluene layer was separated and washed three times with 20 Om1 of water, the toluene layer was distilled off with a rotary evaporator to obtain 195 g of stearoylated lauryldarcoside A (petus-like solid content). (Yield 95.6%).

Lauryl darcoside of Example 1 100 ° /. The heat aging test was performed in the same manner as in Example 1 except that the stearoylated lauryl darcoside AO.02 kg obtained in Example 6 was used instead of 0.02 kg of the product, and the appearance was changed. As a result, the color changed to brown from 950 hours later, and thermal deterioration started.

Table 1 shows the composition of each Example and Comparative Example and the results of the heat aging and heat coloring tests (the numerical values in the table represent parts by weight).

Two Example 1 Comparative Example 1 Example 2 Comparative Example 2 Example 3 Comparative Example 3 Example 4 Comparative Example 4 Example 5 Example Lauryldarcoside

0.2 0.5 0.4

1 000/0 item

Lauryl glucoside

0.5 0.25

50% product

Stearoylated

0.2 Lauryl glucoside

Sword noreno, noichi no, n * no

5 5 0.1 0.1 5

Acid scavenger

Zinc stearate 1 1 1 1 1

Calcium stearate 1 1 1 1 1 1 1

ΡΡ— ΡΕ copolymer 100 100 100

ΕΕΑResin 100 100

Polyvinyl chloride resin 100 100 100 100 100

CO

Talc 20 20 20 G 2-ethylhexyl lid

50 50 50 50 50

Rate

Shizuka k Oxidation "Nishi 4m 125 12R

Erythritol dibasic acid

0.2 0.5

Steal * ²

Polyhydric alcohol stabilizer * ³ 0.5 0.4 0.25 Test temperature 1 50. C 150. C 1 80 ° C 1 80 ° C 1 80 ° C 180 ° C 1 80 ° C 1 80 ° C 180 ° C 1 50 ° Hot coloring time 900 hours 650 hours 60 minutes No coloring 40 minutes yellow 60 minutes No coloring 40 Min.orange 80 min.no coloration 50 min.black spots 60 min.no coloration 950 h brown brown 60 min brown 60 min dark brown 70 min black brown

* 1: Pre-Lenzer HC

* 2: Pre riser MK 400

* 3: Pre- riser ST-210 'Industrial applicability

As described above, the stabilizer for a resin of the present invention can be used for a molded article containing a conventional stabilizer, such as remarkably suppressing coloring due to thermal deterioration in a molded article of a thermoplastic resin composition containing the stabilizer. In comparison, the thermal stability of the thermoplastic resin molded product can be significantly improved. This application is based on a patent application No. 2002-103360 filed in Japan, the contents of which are incorporated in full herein.

Claims

The scope of the claims

1. Stabilizer for thermoplastic resin consisting of alkylated dalcoside.

2. The thermoplastic resin stabilizer according to claim 1, wherein the alkylated dalcoside is an alkylated dalcoside having an acylated hydroxyl group in a glucose skeleton.

3. The stabilizer for thermoplastic resins according to claim 1, wherein the alkylated dalcoside is lauryl darcoside.

4. A stabilizer composition for a thermoplastic resin containing an alkylated dalcoside.

5. The stabilizer composition for a thermoplastic resin according to claim 4, further comprising (A) an alkylated dalcoside, and (B) an acid scavenger.

6. The stabilizer composition for a thermoplastic resin according to claim 5, comprising (B) 0.1 to 100 parts by weight of an acid scavenger with respect to 1 part by weight of the alkylated darcoside (A). ·

7. A stabilizer 5 composition for a thermoplastic resin comprising (A) an alkylated dalcoside, (B) an acid scavenger, and (C) a calcium-zinc-based and / or barium zinc-based stabilizer.

8. For (A) 1 part by weight of alkylated darcoside, (B) 0.1) 100 parts by weight of acid scavenger, (C) Calcium monozinc type and / or barium monozinc type stabilizer 0.:! 8. The stabilizer composition for a thermoplastic resin according to claim 7, comprising from 0.1 to 100 parts by weight.

9. The acid scavenger according to any one of claims 5 to 8, wherein the acid scavenger is at least one selected from hydrated talcite, dolomite compounds, hydroxides or oxides of alkaline earth metals. Stabilizer composition for thermoplastic resin.

10. The stabilizer composition for a thermoplastic resin according to any one of claims 4 to 9, wherein the alkylated dalcoside is lauryl darcoside.

1 1. (D) a thermoplastic resin, and (E) the thermoplastic resin stabilizer according to any one of claims 1 to 3 or the thermoplastic resin according to any one of claims 4 to 10. A thermoplastic resin composition containing a stabilizer composition for fat.

12. (D) For 100 parts by weight of the thermoplastic resin, (E) the stabilizer for a thermoplastic resin according to any one of claims 1 to 3 or the stabilizer according to any one of claims 4 to 10 0.05 to 10% by weight of the stabilizer composition for thermoplastic resin as alkylated darcoside 12. The thermoplastic resin composition according to claim 11, comprising at least one part.

13. The thermoplastic resin composition according to claim 11, wherein the thermoplastic resin is at least one selected from a chlorine-containing resin, a polyolefin-based resin, a polystyrene-based resin, a polyester-based resin, and a polyamide-based resin. .

14. A molded product obtained by molding the thermoplastic resin composition according to any one of claims 11 to 13.