Methacrylate resin with excellent discoloration-resistance and transparency and method for preparing the same

一种甲基丙烯酸酯、甲基丙烯酸丁酯的技术，应用在甲基丙烯酸酯树脂领域，能够解决低耐热性和抗脱色性等问题

Active Publication Date: 2009-04-08
LOTTE ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, pyrolysis occurs during molding, which can lead to low heat resistance and discoloration resistance

Method used

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  • Methacrylate resin with excellent discoloration-resistance and transparency and method for preparing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A monomer mixture including 97 parts by weight of methyl methacrylate and 3 parts by weight of methyl acrylate, 0.3 parts by weight of lauroyl peroxide, and 0.31 parts by weight of n-octyl mercaptan were mixed to form a homogeneous mixture.

[0050] Dissolve the trace suspension stabilization aids disodium hydrogen phosphate and sodium sulfate in 110 parts by weight of ion-exchanged water in a stainless steel high-pressure reactor with a stirring device, and add 0.15 parts by weight of poly(ethylene acrylate) as a suspension stabilizer to it ester - methacrylic acid (molecular weight of at least 1,000,000) and stir. To the aqueous solution of polyalkylacrylate-acrylic acid, the monomer mixture is added and vigorously stirred while purging the reactor with an inert gas such as nitrogen, argon, etc. and heating the reactor. The reaction was carried out at 72°C for 2 hours and then at 110°C for one hour to complete the polymerization. The product was washed, dehydrated an...

Embodiment 2

[0052] Example 2 was prepared in the same manner as Example 1 except that 0.1 parts by weight of polyethylacrylate-methacrylic acid was used.

Embodiment 3

[0054] Example 3 was prepared in the same manner as Example 1, except that 0.15 parts by weight of polyethylhexyl acrylate-acrylic acid was used.

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Abstract

One aspect of the invention relates to a methacrylate resin prepared by suspension polymerization using a polyalkylacrylate-acrylic acid as a suspension stabilizer. The suspension stabilizer is used in an amount of about 0.05 to about 0.25 parts by weight per 100 parts by weight of a monomer mixture. Another aspect of the invention relates to a method for preparing a methacrylate resin, which comprises: preparing a mixture by mixing an initiator and a chain-transfer agent with a monomer mixture comprising at least about 50% by weight of alkyl methacrylate; and adding the mixture to an aqueous solution of polyalkylacrylate-acrylic acid to conduct suspension polymerization.

Description

technical field [0001] The invention relates to a methacrylate resin with decolorization resistance and transparency. More particularly, the present invention relates to a methacrylate resin which can reduce discoloration and has good melting properties without deteriorating Mechanical strength. Background technique [0002] In general, methacrylate resins have sufficient rigidity, high transparency, and excellent weather resistance. Therefore, methacrylate resins are injection molded or extruded for various applications; for example, as injection molded bodies such as lamp glasses and meter covers for automobiles, eyeglass lenses, etc., or as extruded sheets Such as signs and name plates. [0003] When methacrylic resins are molded into extruded articles, it is desired that these resins have high fluidity and transparency during molding. In order to improve the processability of methacrylic resin resins, a method of reducing the molecular weight of the resin or a method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F20/06C08F2/44C08F2/18C08F2/20
CPCC08F2/20C08F2/18C08F20/12C08F2/10C08F20/06C08F20/18C08F120/14C08F120/18C08F220/06C08F20/14C08F265/06
Inventor 郑载勋河斗汉张鼎皓
Owner LOTTE ADVANCED MATERIALS CO LTD
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