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Aromatic vinyl copolymer, method for preparing the same, and molded article including the same

An aromatic vinyl and copolymer technology, applied in the field of aromatic vinyl copolymers, can solve the problems of copolymer decomposition, copolymer color and transparency deterioration, etc.

Inactive Publication Date: 2015-04-22
CHEIL IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when α-methylstyrene is used to improve heat resistance, there is a serious problem that the copolymer may be decomposed by depolymerization when the temperature rises; and when N-phenylmaleimide is used When acting on copolymerized monomers, there are problems in the deterioration of the color and transparency of the copolymer

Method used

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  • Aromatic vinyl copolymer, method for preparing the same, and molded article including the same
  • Aromatic vinyl copolymer, method for preparing the same, and molded article including the same
  • Aromatic vinyl copolymer, method for preparing the same, and molded article including the same

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preparation example Construction

[0052] According to needs, the preparation method may further include: adding monomers and additives for imparting processability and heat resistance such as plasticizers, crosslinking agents, heat stabilizers, colorants, ultraviolet absorbers, etc., but not limited thereto .

[0053] Examples of monomers for imparting processability and heat resistance include (meth)acrylic acid C 1 to C 12 Alkyl esters, (meth)acrylic acid, maleic anhydride, N-substituted maleimides, mixtures thereof, etc., but not limited thereto. The monomer for imparting processability and heat resistance is optionally present in an amount of 15 parts by weight or less, preferably from 0.1 to 10 parts by weight, based on 100 parts by weight of the total monomer mixture. Within this range, the monomer for imparting processability and heat resistance can impart processability and heat resistance to the aromatic vinyl copolymer without deteriorating other properties.

[0054] After completing the polymeriz...

Embodiment 1 to 5

[0058] According to the ingredients listed in Table 1, put benzoyl peroxide (BPO) or azobisisobutyronitrile (AIBN) as an initiator into a 100-ml round bottom flask, and the flask was filled sequentially with toluene, styrene (SM), Acrylonitrile (AN) and β-methyl-α-methylene-γ-butyrolactone (MMBL). Then, these components were stirred for 17 hours while gradually increasing the temperature of the reactants to 60°C to 90°C. After the polymerization was completed, the temperature of the reactant was lowered to room temperature, and 20 ml of chloroform was added to the reactant, followed by stirring for 10 minutes. Then, the resultant was gradually added dropwise to 500 ml of methanol, thereby forming a precipitate. After filtration, the precipitate was washed with methanol and dried in a vacuum oven, thereby preparing an aromatic vinyl copolymer. In Table 1, the yields and yields of the prepared aromatic vinyl copolymers are shown. The weight-average molecular weight (Mw), numb...

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Abstract

An aromatic vinyl copolymer can exhibit excellent heat resistance and / or transparency and is a copolymer of a monomer mixture, which includes: an exo-methylene butyrolactone compound represented by Formula 1; an aromatic vinyl compound; and a vinyl cyanide compound. wherein R1 and R2 are each independently hydrogen, C1 to C12 alkyl, or C6 to C12 aryl.

Description

technical field [0001] The present invention relates to aromatic vinyl copolymers, processes for their preparation and molded articles comprising them. More specifically, the present invention relates to an aromatic vinyl copolymer comprising an exo-methylenebutyrolactone compound and exhibiting excellent properties in terms of heat resistance and transparency, a production method thereof, and a molded article comprising the same. Background technique [0002] Polystyrene is a relatively inexpensive transparent polymer that exhibits good optical properties. However, since polystyrene has a glass transition temperature (T g ) and thus exhibit insufficient heat resistance, polystyrene is not suitable for use as a plastic for backlight units (BLUs) and automobiles that require high heat resistance. Therefore, if a highly heat-resistant polystyrene polymer can be prepared by copolymerization with other monomers, it is expected that a new market will be created. In particular,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F220/44C08F224/00C08L25/12
CPCC08F212/08C08F24/00C08F224/00C08F220/44C08F212/06C08F220/42C08J5/00
Inventor 周范俊金善大
Owner CHEIL IND INC