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Non-foaming treatment auxiliary agent, resin composition, and molded article

A processing aid and non-foaming technology, which is applied in the field of non-foaming molding processing aids, resin compositions, and moldings, can solve the problem of inability to obtain surface-appearing moldings, and the vinyl chloride-based resin composition has not yet fully solidified. Eliminate problems such as gelation, achieve good surface appearance, good gelation properties, and improved gelation properties

Active Publication Date: 2012-04-25
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In these methods, gelation is promoted during melt-kneading of the vinyl chloride resin composition, and improvement in molding processability can be confirmed, but sufficient gelation of the vinyl chloride resin composition has not yet been achieved, and there is a problem that it cannot be obtained. Problems with moldings with good surface appearance

Method used

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  • Non-foaming treatment auxiliary agent, resin composition, and molded article
  • Non-foaming treatment auxiliary agent, resin composition, and molded article

Examples

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Embodiment

[0078] Hereinafter, although an Example demonstrates this invention concretely, the technical scope of this invention is not limited to the following Example.

[0079] In addition, "part" and "%" in an Example represent "part by mass" and "% by mass", respectively.

[0080] (1) Polymerization rate

[0081] The polymerization rate of the alkyl (meth)acrylate polymer (A) was measured by adding a polymerization inhibitor (hydroquinone) to the emulsion of the polymer collected after polymerization, heating at 180° C. for 30 minutes, and measuring the solid content. And compare it with the calculated value obtained from the feeding amount to calculate.

[0082] (2) Mass average molecular weight (Mw), number average molecular weight (Mn)

[0083] The Mw and Mn of the (meth)alkyl acrylate polymer (A) are based on the tetrahydrofuran (THF) soluble component of the (meth)alkyl acrylate polymer (A) as a sample, and the Gel permeation chromatography (machine type name "HLC-8220", manu...

manufacture example 1

[0095] [Production example 1] Production of alkyl (meth)acrylate polymer (A1)

[0096] 100 parts (1000 g) of isobutyl methacrylate, 0.02 parts of n-octyl mercaptan, 300 parts of deionized water and 1.1 parts of sodium dodecylbenzenesulfonate were stirred for 6 minutes using a homomixer at 10000 rpm to obtain an emulsified mixture .

[0097] The above-mentioned emulsified mixture was put into a detachable flask (capacity of 5 liters) equipped with a thermometer, a nitrogen introduction pipe, a cooling pipe, and a stirring device, and the inside of the container was replaced with nitrogen.

[0098] Next, the inner temperature was raised to 60° C., and 0.15 parts of potassium persulfate was added.

[0099] Then, heating and stirring were continued for 2 hours to complete the polymerization, and an emulsion of an alkyl (meth)acrylate polymer (A1) was obtained. The obtained emulsion of the alkyl (meth)acrylate type polymer (A1) was dripped at 100 parts of hot water containing 5 p...

manufacture example 2～7

[0102] [Production Examples 2 to 7] Production of Alkyl (Meth)acrylate Polymers (A2) to (A7)

[0103] Except having changed the composition of the monomer component (a) like Table 1, it carried out similarly to manufacture example 1, and produced the alkyl (meth)acrylate type polymer (A). In Table 1, "n-BMA" represents n-butyl methacrylate, "MMA" represents methyl methacrylate, and "n-BA" represents n-butyl acrylate.

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Abstract

Provided is a treatment auxiliary agent for improving the gelling properties and moldability of a vinyl chloride resin composition and obtaining a molded article having good surface appearance. A non-foaming treatment auxiliary agent comprises an alkyl (meth)acrylate polymer (A) containing 65 mass% or greater of i-butyl methacrylate (a1) units and having a mass-average molecular weight of 200,000 to 2,000,000.

Description

technical field [0001] The present invention relates to a processing aid for non-foaming molding, a vinyl chloride resin composition for non-foaming molding containing a vinyl chloride resin and a processing aid for non-foaming molding, a vinyl chloride resin and a non-foaming A vinyl chloride-based resin molded article of a processing aid for molding and a method for producing the same. Background technique [0002] Vinyl chloride resins, which are thermoplastic resins, are excellent in various physical properties such as chemical resistance, impact resistance, and weather resistance, and are inexpensive, so they are widely used as high-utility general-purpose resin materials. However, since the softening temperature of vinyl chloride resin is high, it is necessary to set the melting temperature at the time of thermoforming to a temperature close to the thermal decomposition temperature, and furthermore, there are problems such as a narrow temperature range that can be ther...

Claims

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Application Information

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IPC IPC(8): C08F20/10C08L27/06C08L33/04
CPCC08L27/06C08L33/10C08F2220/1825C08F220/1804C08L2666/04C08F220/14
Inventor 宍户耕一畑江阳子
Owner MITSUBISHI CHEM CORP
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