JPH0570649A - Vinyl chloride resin composition - Google Patents

Abstract

PURPOSE:To provide the subject non-toxic composition containing a hydrotalcite compound, a polyhydric alcohol and a fatty acid zinc salt having specific electrical conductivity as a stabilizer, free from lead-based stabilizer and having excellent electrical insulation and heat-stability. CONSTITUTION:The objective composition is produced by compounding (A) 100 pts.wt. of a vinyl chloride resin with (B) preferably 0.5-5 pts.wt. of a hydrotalcite compound [preferably an Mg.Zn.Al compound such as Mg3.5 Zn1.0Al2(OH)13CO3.3.5H2O), (C) 0.1-2 pts.wt. of a >=3-hydric alcohol (e.g. trimethylolpropane) and (D) 0.1-2 pts.wt. of a fatty acid zinc salt having an electrical conductivity of <=50mul/OMEGAcm. The component D is e.g. zinc stearate and zinc palmitate. It is preferable to directly react a fatty acid with oxide, hydroxide or carbonate of zinc under melting in order to get the electrical conductivity satisfying the above condition.

Description

Detailed Description of the Invention

FIELD OF THE INVENTION The present invention relates to a vinyl chloride resin composition, and more particularly to a vinyl chloride resin composition having excellent electrical insulation.

BACKGROUND OF THE INVENTION Vinyl chloride resins contain various stabilizers and additives in order to satisfy the thermal stability and processability during molding and the electrical and mechanical properties of products. I need. Among them, vinyl chloride products such as electric wires and insulating tapes require electrical insulation and thermal stability, and therefore lead-based stabilizers such as tribasic lead sulfate and lead stearate are mainly used. However, in recent years, due to problems such as safety for human body and industrial waste, detoxification of plastic additives has been avoided, and non-toxic stabilizers having electric insulation and thermal stability that can replace lead stabilizers. Was desired to be developed. Recently, the use of hydrotalcite compounds as heat stabilizers for vinyl chloride resins has been proposed (for example, JP-A-57-80444 and JP-A-58-1555).
0, JP-A-60-123545, JP-A-61-1742
70), the conventional compounding recipes found in these examples and the like are excellent in thermal stability but insufficient in electric insulation, so that the performance of the lead-based stabilizer is still unsatisfactory. The present inventors have aimed to find a non-toxic stabilizer excellent in electric insulation and thermal stability in such a field without using a lead-based stabilizer.

The present inventors have made such a situation.
As a result of diligent study in consideration of the situation, hydrotalcite compounds
And a trihydric or higher polyhydric alcohol compound and an electric conductivity of 5
By using fatty acid zinc of 0μ1 / Ωcm or less
For the first time, the excellent effects of both electrical insulation and thermal stability
We have found that they can be obtained. That is, the present invention is
Vinyl chloride resin (1) Hydrotalcite compounds
And (2) at least trivalent or higher polyhydric alcohol compounds
One kind, and (3) oil with conductivity of 50 μ1 / Ωcm or less
Vinyl chloride resin characterized by containing zinc fatty acid
It is a composition. The vinyl chloride resin of the present invention means vinyl chloride.
Nyl homopolymer or vinyl chloride based resin
For example, vinyl chloride and vinyl acetate, vinyl chloride
Ethylene, propylene, methacrylic acid ester,
Copolymer or graft polymer with urethane resin
Blends with these resins and the like. Used in the present invention
As hydrotalcite compounds,The compound represented by₆Al_Two(OH)₁₆CO_Three・ 4H_TwoO Mg_4.5Al_Two(OH)_ThirteenCO_Three・ 3.5H_TwoO Mg_4.5Al_Two(OH)_ThirteenCO_Three  Mg_3.5Zn_1.0Al_Two(OH)_ThirteenCO_Three・ 3.
5H_TwoO and the like. Commercially available products include Alcamizer 1, Al
Camizer 2, Alcamizer 3, Alcamizer 4,
Alkamizer 5, DHT-4A (both Kyowa Chemical
Manufactured by a company). Assortment of these hydrotalcites
The compound is 0.1 per 100 parts by weight of vinyl chloride resin.
-10 to 10 parts by weight, more preferably 0.5 to 5.
Used 0 parts by weight. Next, the fatty acid
Examples of lead include zinc stearate and palmitic acid
Lead, zinc myristate, zinc laurate, octyl phosphite
Lead, zinc behenate, etc. are mentioned, and especially the conductivity is 50μ.
Fatty acid zinc of 1 / Ωcm or less includes the above-mentioned fatty acids
Direct melting reaction of zinc with zinc oxide, hydroxide and carbonate
Those obtained by are preferred. Normal fatty acid
Saponification with isoda, etc., and then zinc chloride or zinc sulfate
Fatty acid zinc obtained by so-called metathesis reaction
Even if it is washed with water for an extremely long time, the desired conductivity of 50 μ1 /
A film having an Ωcm or less can be obtained, but it is not efficient. these
The fatty acid zinc is 100 parts by weight of vinyl chloride resin,
0.05 to 5 parts by weight, more preferably 0.1
~ 2.0 parts by weight are used. Also used in the present invention 3
As the polyhydric alcohol compound having a valency or more, various compounds can be used.
It can be used without limitation, for example, ditrimethylolethane,
Trimethylolpropane, glycerin, mannitol,
Sorbitol, pentaerythritol, dipentaeryth
Litol, dipentaerythritol, adipic acid partial
Examples include stealth. These three or more multivalent al
Cole compound should be added to 100 parts by weight of vinyl chloride resin.
0.05 to 5 parts by weight, more preferably,
0.1 to 2.0 parts by weight are used. In addition, the present invention
Plastics that have traditionally been used for vinyl chloride resins
Agent, filler, heat stabilization aid, antioxidant, UV absorption
Agents, epoxy compounds, lubricants, pigments, etc. may be used in combination
Needless to say.

Embodiments will be specifically described below with reference to embodiments. Synthesis Example 1 100 g of stearic acid was melted at 130 ° C., and 15.0 g of zinc oxide was added little by little while stirring. After the addition of zinc oxide was completed, the mixture was stirred and aged for 30 minutes, cooled, and then ground.
The obtained zinc stearate has a conductivity of 30 μ1 / Ωcm,
The melting point was 122 ° C. and the Zn content was 10.5%. For other fatty acids, those reacted in the same manner were used. Synthetic Example 2 127.3 g of stearic acid was added to warm water of 90 ° C. 2000 cc
Suspended in an aqueous solution of caustic soda (413.8 g /
l) 44.9 ml was added. After lowering the liquid temperature to 70 ° C., an aqueous solution of zinc chloride (268.4 g / l) was added to 117.
5 ml was added and aged for 30 minutes with stirring. After that, the reaction solution was filtered, and the obtained cake was washed with 2000 cc of water.
After being washed with water twice, it was dried in a drier at 105 ° C. for 20 hours and pulverized. The obtained metathesis zinc stearate has an electric conductivity of 1
80 μ1 / Ωcm, melting point 123 ° C., Zn content 10.4
%Met. The conductivity was measured as follows.
Weigh 4 g of the sample in a conical beaker, add 5 ml of ethyl alcohol and mix well, then deionize water 100
Add ml and heat to boiling for 30 minutes with stirring. After allowing to cool, filter and add ion-exchanged water to the filtrate to obtain 100 ml.
After that, this liquid is CO produced by Toa Electronics Co., Ltd.
It was measured by NDUCT-METER (MODEL CM-2A). Example 1 The formulations shown in Table 1 were kneaded with a kneading roll at 160 ° C. for 5 minutes, and the obtained films were stacked and pressed with a pressing machine at 170 ° C. for 10 minutes to prepare a press sheet having a thickness of 1 mm. .. Using the obtained press sheet, JIS
According to the test method of K-6723, volume resistivity (30 ℃
And thermal stability (measured at 180 ° C.) were evaluated. Example 2 The formulations in Table 2 were evaluated as in Example 1.

As described above, the vinyl chloride resin composition according to the present invention is excellent in both electric insulation (volume resistivity) and thermal stability, and is more excellent than fatty acid zinc which is generally used conventionally. It can be seen that the use of fatty acid zinc having an electric conductivity of 50 μl / Ωcm or less and a polyhydric alcohol compound having a valence of 3 or more markedly improves the electrical insulating property (volume resistivity) and heat resistance. In addition, Mg, Zn, and Mg are better than Mg and Al hydrotalcite (trade name: Alcamizer 1).
Al-based hydrotalcite (trade name: Alcamizer 4) is superior in electrical insulation and thermal stability.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroyuki Yasui 5-1-1 Ebishima-cho, Sakai City, Osaka Prefecture Sakai Chemical Industry Co., Ltd. Sakai Plant

Claims (1)

[Claims] 1. A hydrotalcite-based compound, (2) at least one polyhydric alcohol compound having a valence of 3 or more, and (3)
A vinyl chloride resin composition comprising a fatty acid zinc having an electrical conductivity of 50 μ1 / Ωcm or less.