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

Methacrylic resin composition and molded body

A technology of methacrylic resin composition, which is applied in the field of methacrylic resin composition and molded body, to achieve the effects of excellent hue, excellent molding processability, and sufficient heat resistance

Active Publication Date: 2020-12-29
ASAHI KASEI KK
View PDF17 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] According to the technology disclosed in Patent Document 2, the long-path transmittance of the light guide is significantly improved, but there is a problem that further improvement is required from the viewpoint of long-term hue stability and improvement of whiteness in long-path.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Methacrylic resin composition and molded body
  • Methacrylic resin composition and molded body
  • Methacrylic resin composition and molded body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0398] Hereinafter, the present embodiment will be described with reference to specific examples and comparative examples, but the present embodiment is not limited to the examples described later.

[0399] (raw material)

[0400] Raw materials used in Examples and Comparative Examples described below are as follows.

[0401] (Monomer constituting methacrylic resin)

[0402]

[0403] (A-1): Methyl methacrylate (MMA).

[0404] Manufactured by Asahi Kasei Co., Ltd. (As a polymerization inhibitor, 2.5 ppm of 2,4-dimethyl-6-tert-butylphenol (2,4-di-methyl-6-tert-butylphenol) manufactured by Chugai Trading Co., Ltd. was added ).

[0405]

[0406] (B-1): N-phenylmaleimide (N-PMI): manufactured by Nippon Shokubai Co., Ltd.

[0407] (B-2): N-cyclohexylmaleimide (N-CMI): Synthesized by the following production method.

[0408] Add maleic anhydride and 6 times the amount of o-xylene per unit mass of the maleic anhydride to a flask with a thermometer, a Dean-Stark tube, a droppi...

manufacture example 1

[0529] 2 kg of water, 65 g of tricalcium phosphate, 39 g of calcium carbonate, and 0.39 g of sodium lauryl sulfate were added to a container having a mixer equipped with four inclined blades to obtain a mixed solution (a).

[0530] Then, put 26kg of water into a 60L reactor equipped with a stirrer with 3 retreating wings, raise the temperature to 75°C, throw in the mixed solution (a), and then put in pre-mixed 95 parts by mass of methyl methacrylate Ester (A-1), 5 parts by mass of cyclohexylmaleimide (B-2), 0.295 parts by mass of chain transfer agent n-octyl mercaptan, 0.25 parts by mass of polymerization initiator 2-ethyl peroxide 22kg of monomer mixed solution of tert-butyl hexanoate.

[0531] Suspension polymerization was carried out while maintaining about 75°C, and the exothermic peak was observed after about 120 minutes after the raw material mixture was charged. Then, after raising the temperature to 97° C. at a rate of 1° C. / min, aging was carried out for 120 minutes ...

manufacture example 2

[0536] 2 kg of water, 65 g of tricalcium phosphate, 39 g of calcium carbonate, and 0.39 g of sodium lauryl sulfate were added to a container having a mixer equipped with four inclined blades to obtain a mixed liquid (a).

[0537] Then, put 26 kg of water into a 60-L reactor with a stirrer equipped with three retreating wings, raise the temperature to 75° C., throw in the mixed liquid (a), and then put in pre-mixed 90 parts by mass of methyl methacrylate Esters (A-1), 5 parts by mass of cyclohexylmaleimide (B-2), 5 parts by mass of styrene, 0.24 parts by mass of chain transfer agent n-octyl mercaptan, 0.20 parts by mass of polymerization initiation 22kg of monomer mixed solution of 2-ethylhexanoic acid tert-butyl peroxide.

[0538] Suspension polymerization was carried out while maintaining about 75°C, and the exothermic peak was observed after about 120 minutes after the raw material mixture was charged.

[0539] Then, after raising the temperature to 93° C. at a rate of 1° C...

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
thicknessaaaaaaaaaa
particle sizeaaaaaaaaaa
melting pointaaaaaaaaaa
Login to View More

Abstract

A methacrylic resin composition which contains: 100 parts by mass of a methacrylic resin which contains 50-97% by mass of (A) a methacrylic acid ester monomer unit, 3-30% by mass of (B) a structural unit having a ring structure in the main chain, and 0-20% by mass of (C) another vinyl monomer unit which is copolymerizable with a methacrylic acid ester monomer; and 0.001-0.2 part by mass of (D) a compound that has a specific structure. This methacrylic resin composition satisfies the following conditions (I) and (II). (I): This methacrylic resin composition has a weight average molecular weightof from 65,000 to 300,000 as determined by gel permeation chromatography (GPC). (II): The mass ratio of the structural unit (B) having a ring structure in the main chain to the component (D) satisfies 25 <=(B) / (D)<= 1,000.

Description

technical field [0001] The present invention relates to a methacrylic resin composition and a molded article. Background technique [0002] Methacrylic resins represented by polymethyl methacrylate (PMMA) have high transparency, so they have been used in the fields of optical materials, vehicle components, construction materials, lenses, household goods, OA equipment, lighting equipment, etc. widely used. Among them, in the field of optical member materials such as light guide plates and light guides represented by thick-walled lenses, it has the ease of molding process that is characteristic of thermoplastic resins and the transparency that is particularly excellent among thermoplastic resins. Therefore, many Use methacrylic resin. [0003] As a light source used in combination with the above-mentioned optical member material, LEDs are mainly used in recent years. In particular, since linearity of light emitted from a light source is required for a light guide, LEDs are ...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/10C08F220/10C08J5/18C08K5/07C08K5/3432
CPCC08K5/3415C08J5/00C08K5/3432C08K5/07C08J5/18C08F220/14C08L33/12C08F222/402C08F220/06C08F212/08C08L33/10C08F220/10B29C45/0001B29K2033/12
Inventor 小林信博村上史树
Owner ASAHI KASEI KK