Unlock instant, AI-driven research and patent intelligence for your innovation.

Copolymer for improving methacrylic resin heat resistance

Inactive Publication Date: 2015-07-23
DENKA CO LTD
View PDF3 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a copolymer that can improve the heat resistance of methacrylic resin while maintaining its clarity. By adding this copolymer to methacrylic resin, a molded product with excellent appearance can be obtained.

Problems solved by technology

Here, methacrylic resin is superior in optical characteristics such as transparency and the like, however, it is inferior in heat resistance and the like, and thus the application of methacrylic resin was limited.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

examples

Manufacturing Example of Copolymer (A-1)

[0053]A 20% maleic acid anhydride solution was prepared by dissolving maleic acid anhydride in methyl isobutyl ketone so that the maleic acid anhydride is contained by 20 mass %, and a 2% t-butyl peroxy-2-ethyl hexanoate solution was prepared by diluting t-butyl peroxy-2-ethyl hexanoate with methyl isobutyl ketone so that the t-butyl peroxy-2-ethyl hexanoate is contained by 2 mass %. These solutions were used in the polymerization.

[0054]To a 120 liter autoclave equipped with an agitator, 20% maleic acid anhydride solution (2.4 kg), styrene (24 kg), methyl methacrylate (11.2 kg), t-dodecyl mercaptan (30 g), and methyl isobutyl ketone (2 kg) were added. The gas in the remaining space of the autoclave was replaced with nitrogen gas, and the temperature of the mixture was raised to 87° C. taking 40 minutes with agitation. After raising the temperature, the temperature of the mixture was kept at 87° C., the 20% maleic acid anhydride solution was ad...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Fractionaaaaaaaaaa
Percent by massaaaaaaaaaa
Percent by massaaaaaaaaaa
Login to View More

Abstract

A copolymer for improving heat resistance of a methacrylic resin which can achieve preservation of excellent transparency of the methacrylic resin and improvement in heat resistance, and can provide a molded product having excellent appearance, by adding the copolymer to the methacrylic resin, is provided. According to the present invention, a copolymer for improving heat resistance of a methacrylic resin, including: 45 to 85 mass % of an aromatic vinyl monomer unit; 5 to 45 mass % of a (meth)acrylic acid ester monomer unit; and 10 to 20 mass % of an unsaturated dicarboxylic acid anhydride monomer unit; wherein the copolymer has a total light transmittance of 88% or more, the total light transmittance being measured in accordance with ASTM D1003 for a sample with 2 mm-thickness, is provided.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is national stage of International Application No. PCT / JP2013 / 070484, filed Jul. 29, 2013, which claims the benefit of priority to Japanese Application No. 2012-168675, filed Jul. 30, 2012, in the Japanese Patent Office. All disclosures of the documents named above are incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a copolymer for improving heat resistance of a methacrylic resin, a resin composition of the copolymer for improving heat resistance of the methacrylic resin and a methacrylic resin, and a molded body made from the resin composition.[0004]2. Description of the Related Art[0005]Transparent resin is used for various purposes including parts of consumer electronics, a food container, and general goods. Recently, from the viewpoint of light weight, productivity, and cost, transparent resin has been used frequently as a retardation fi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08F24/00C08L33/08
CPCC08L33/08C08F24/00C08J5/18C08J2333/00C08F212/08C08F220/10C08F222/02C09J133/06C08L25/14C08L33/06C08F220/14C08F222/08C08F212/04C08F220/04C08F220/12C08L33/064C08J2333/12C08J2335/02C08J2433/12C08J2435/02C08F222/06C08L33/10C08F222/04C08L33/12C08L35/02G02B1/04
Inventor NOGUCHI, TETSUOOHTSUKA, TAKESHIMATSUMOTO, MASANORISHINDO, YUICHI
Owner DENKA CO LTD