JPS60177053A - Stabilized halogen-containing resin composition - Google Patents

Abstract

PURPOSE:To provide the titled composition having high heat-deformation temperature and exhibiting high thermal stability, by compounding a halogen-containing resin with a hydrotalcite, a dialkyltin malate polymer and a dialkyltin beta-mercaptopropionate polymer. CONSTITUTION:(A) 100pts.(wt.) of a halogen-containing resin is compounded with (B) 0.01-5pts. of a hydrotalcite, (C) a dialkyltin malate polymer and (D) a dialkyltin beta-mercaptopropionate polymer. The ratio of the component C to D is 10:1-1:10, and the sum of the components C and D is 0.05-5pts.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rogen-containing resin composition having a high heat distortion temperature and a high degree of thermal stability.

Recently, OA equipment housing, construction, packaging containers.

There is a trend for plastic products used for pipes, fittings, etc. to be light, thin, short, and small. Vinyl chloride resins and polymer blend resins containing vinyl chloride resins are often used in these applications.

However, when trying to thin the final product.

Since it is easily deformed by heat, a resin composition with a correspondingly high heat deformation temperature is required, and in terms of processing speed, the resin composition must be able to withstand higher molding temperatures than conventional ones.

Deterioration prevention method by adding idrotalcites or dibutyltin maleate acid neutralizer to vinyl chloride resin (
JP-A No. 55-80445) and a method of stabilizing vinyl chloride resin by adding hydrotalcites and an organic tin salt of thioglycolic acid ester (JP-A No. 57-20994).
No. 3) has been proposed, but the former method cannot achieve results that satisfy the above conditions in terms of thermal stability, and the latter method in terms of thermal stability and heat distortion temperature.

As a result of research from the above viewpoint, the present inventors have found that if two specific organic tin compounds are added to hydrotalcites, a rogen-containing resin composition has a high heat distortion temperature and a high degree of thermal stability. succeeded in obtaining.

That is, the present invention relates to halogen-containing resins.

A stabilized halogen-containing resin composition characterized by adding (a) hydrotalcites, (b) a dialkyltin malate polymer, and (c) a dialkyltin β-mercaptopropionate polymer.

In the present invention, the idrotalzyl compounds added to the halogen-containing resin include 1, for example, magnesium 7ium and aluminum represented by the general formula % (where 0x≦0.5+m is a positive number). Examples include hydrated double salt compounds, which may be natural products or synthetic products. These are commercially available. The amount of hydrotalcites added is 0.001 to 5 parts by weight per 100 parts of halogen-containing resin.

The other two organotin compounds added in the present invention are a hasialkyltin malate polymer and a dialkyltin β-mercaptopropionate polymer.

Examples of dialkyltin maleate polymers include dimethyltin maleate polymer, dibutyltin maleate polymer,
Examples of the dialkyltin β-mercaptopropionate polymers include dioctyltin malate polymers, dialkyltin malate polymers, and examples of the dialkyltin β-mercaptopropionate polymers include dimethyltin β-mercaptopropionate polymers, diptyltin β-mercaptopropionate polymers, Examples include dioctyltin β-mercaptogropionate polymer and dodecyltin β-mercaptopropionate polymer. The addition ratio of these two types of organic tin compounds is from 10:1 to
The ratio is in the range of 1:10, and the amount added is 10% of the halogen-containing resin.
The total amount of both is 0.05 to 5.0 parts by weight.

Examples of the halogen-containing resins stabilized by the present invention include vinyl chloride resins, vinyl bromide resins, and vinylidene chloride resins; vinyl chloride homopolymers;
and vinyl norogenated vinyl acetate, ethylene, fluoropylene, styrene, imbutylene, vinylidene chloride,
Maleic anhydride, butadiene, inopre/, methyl methacrylate.

Copolymers such as those formed by polymerization with one or more comonomers such as acrylonitrile, dialkylmalates, and the like.

Examples include post-chlorinated vinyl chloride resin. In addition, halogen-containing resins, acrylonitrile, butadiene,
Styrene resin, methyl methacrylate, butadiene, styrene resin, acrylonitrile, chlorinated polyethylene,
Styrene copolymer resin.

Acrylic rubber/acrylonitrile/styrene copolymer resin, acrylic rubber/methyl methacrylate/acrylonitrile copolymer resin, vinyl acetate/ethylene copolymer resin, chlorinated polyethylene, polymer blend resin with impact-improved resin such as chlorinated rubber, etc. can be mentioned.

2 known stabilizers for the halogen-containing resin compositions of the present invention, such as metal organic acid salts, epoxy/compounds, phenolic antioxidants, boric acid, boric anhydride.

Borates, anhydrous borates, boric esters, functional phosphoric esters, and ultraviolet absorbers can be added. Pigments, fillers, lubricants, antistatic agents, flame retardants,
Processing aids can also be used.

According to the present invention, a resin composition obtained by adding hydrotalcites and two types of organic tin compounds as stabilizers to a halogen-containing resin has a high heat distortion temperature, and has a high thermal distortion temperature even when processed at high temperatures. Because it exhibits excellent thermal stability, it can also be used in fields where light, thin, short, and small plastic products are required.

Next, the present invention will be explained with reference to Examples. In addition.

Parts in the examples indicate parts by weight.

Example 1 A mixture of idrotalcite (DHT-4A, manufactured by Kyowa Chemical Industry Co., Ltd.) and an organic tin compound shown in Table 1 below was added to 100 parts of vinyl chloride resin (Geon 103 EP-8, manufactured by Nippon Zeo 7). Two parts of the mixture were mixed and kneaded for 5 minutes at 170°C using a test roll, and then a sheet with a thickness of 0.5 mm was prepared. After each sheet was cut into a size of 2 cm x 2 (Jn), it was placed in a gear aging tester at 200°C to examine the decomposition time and colorability.

The results are shown in Table 1.

Example Z Vinyl chloride resin (Geon 103 EP-8) 10
0 parts, 10 parts of methyl methacrylate-butadiene-styrene resin (Kane Ace B-12. manufactured by Kaneka Co., Ltd.), and the following 2nd part.
Three parts of the mixture of No.1 hydrotalcite (Alcamizer ■, manufactured by Kyowa Kagaku Kogyo Co., Ltd.) and an organic tin compound shown in the table were mixed and tested in the same manner as in Example 1 to examine the decomposition time and coloration.

The results are shown in Table 2.

Example 3 50 parts of vinyl chloride resin (Geon 103EP-8), 50 parts of acrylonitrile-butadiene-styrene m fat (Toyolac 100, manufactured by Toshisha Co., Ltd.), and the hydrotalcite shown in Table 3 below (Alcamizer ■, Kyowa Co., Ltd.) (manufactured by Kagaku Kogyo Co., Ltd.) and an organic tin compound.

A test was carried out in the same manner as in Example 1 to examine the two-decomposition time and coloring property.

The results are shown in Table 3.

Example 4 Vinyl chloride resin (Geon 103 EP-8) 50
50 parts of acrylonitrile-butadiene-styrene resin (Toyolac 100) and 3 parts of a mixture of hydrotalcite (DHT-4A) and organotin compound shown in Table 4 below.
After kneading with a test roll at 170°C for 5 minutes, a notebook with a thickness of 0.5M was prepared. 4 sheets each
The sheets were put together and pressed for 10 minutes at 180° C. using a press machine, and the 2NN-thick press plate was subjected to a heating test in accordance with JIS K-6739 to examine the heat deformation temperature.

The results are shown in Table 4.

Claims (1)

[Claims] ...For the rogen-containing resin, (a) no-hydrotalcyan 1-, (b) dialkyltin malate polymer and (C
)) A stabilized nitrogen-containing resin composition characterized by the addition of an alkyltin β-mercaptopropionate polymer.