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Resin composition, molded article and laminated body

A technology of resin composition and resin mixture, applied in the direction of synthetic resin layered products, layered products, chemical instruments and methods, etc., can solve the problems of heat resistance, decreased moisture resistance, decreased moisture resistance, decreased heat resistance, etc.

Active Publication Date: 2020-07-28
KURARAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, by including a lubricant, the physical properties are improved, but on the other hand, the heat resistance and moisture resistance are lowered
Decrease in heat resistance causes dimensional changes in molded articles using the methacrylic resin composition, and thus poses a problem in applications requiring dimensional accuracy
In addition, for the same reason, a decrease in moisture resistance is also a problem

Method used

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  • Resin composition, molded article and laminated body
  • Resin composition, molded article and laminated body
  • Resin composition, molded article and laminated body

Examples

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preparation example Construction

[0104] The method for preparing the resin composition of the present invention is not particularly limited. For example, it can be obtained by kneading the resin mixture (M) at a temperature higher than the softening point, adding a lubricant satisfying the conditions (i) and (ii) with respect to 100 parts by mass of the resin mixture (M) of the present invention, and optionally It is obtained by compounding additives and other polymers and kneading. Alternatively, it can be obtained by dissolving the resin mixture (M), the lubricant satisfying the conditions (i) and (ii) of the present invention, additives and other polymers blended as needed in a solvent, and removing the solvent from the solution. , thus obtained.

[0105] The glass transition temperature of the resin composition of the present invention is preferably 115 to 160°C. More preferably, it is 130-155 degreeC, More preferably, it is 140-150 degreeC. By setting the glass transition temperature of the resin comp...

Embodiment 1a

[0141] Using a twin-screw kneader, 90 parts by mass of methacrylic resin (A), vinyl copolymer (B) (manufactured by Denki Kagaku Kogyo Co., Ltd., RESISFY R-200, vitrified Transition temperature 134°C, saturated water absorption rate 0.7% by mass) 10 parts by mass, cetyl alcohol (manufactured by Kao Corporation, KALCOL6098) 0.15 parts by mass as a lubricant (Y), stearic acid monoglycerol as a lubricant (x1) 0.03 parts by mass of ester (manufactured by Kao Corporation, EXCEL T95) was melt-kneaded. Then, the molten resin is extruded to obtain a granular resin composition [1]. Table 1 shows the composition and physical properties (Tg and saturated water absorption of the resin composition) of the resin composition [1].

Embodiment 2a

[0143] The composition ratio of the resin mixture (M) was 70 parts by mass of the methacrylic resin (A) and 30 parts by mass of the vinyl copolymer (B), and a resin combination was obtained by the same method as in Example 1a. thing [2]. Table 1 shows the composition and physical properties of the resin composition [2].

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Abstract

The present invention provides a resin composition and the like which are less prone to gel formation during melt molding in a resin composition containing a methacrylic resin and a lubricant. The resin composition of the present invention contains a resin mixture (M) containing a methacrylic resin (A) and a vinyl copolymer (B), and a lubricant. The vinyl copolymer ( B) Contains a structural unit of formula (1) and a structural unit of formula (2). The lubricant satisfies the conditions of (i) and (ii) with respect to 100 parts by mass of the resin mixture (M). (i) A lubricant (x1) that does not contain monoglycerides of saturated fatty acids having 10 to 24 carbon atoms, or is 0.1 parts by mass or less. (ii) 0.001 to 2 parts by mass of the lubricant (Y), which contains a lubricant selected from higher alcohols, hydrocarbons, fatty acids, fatty acid metal salts, aliphatic amides, and fatty acid esters (wherein, excluding lubricants) (x1) and a lubricant (x2) consisting of a fatty acid ester having two or more hydroxyl groups in one molecule other than the lubricant (x1). (R in formula (1) 1 and R 2 Each independently represents a hydrogen atom or an alkyl group. ) (R in formula (2) 3 and R 4 Each independently represents a hydrogen atom or an alkyl group. )

Description

technical field [0001] The present invention relates to a resin composition containing a methacrylic resin, a vinyl copolymer and a lubricant. Moreover, it is related with the molded article and laminated body which contain the said resin composition. Background technique [0002] Lubricants are sometimes added to methacrylic resins excellent in transparency, scratch resistance, and weather resistance for the purpose of improving mold release and processability (for example, Patent Documents 1 and 2). However, although the physical properties are improved by containing a lubricant, on the other hand, the heat resistance and the moisture resistance are lowered. A decrease in heat resistance causes a dimensional change in a molded article using the methacrylic resin composition, and thus poses a problem in applications requiring dimensional accuracy. In addition, for the same reason, a decrease in moisture resistance is also a problem. [0003] Copolymer resins composed of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L33/10B32B27/18B32B27/30C08K5/05C08K5/09C08K5/103C08L25/08C08L33/12
CPCB32B27/18B32B27/30C08K5/05C08K5/09C08K5/103C08L25/08C08L33/10C08L33/12C08L25/14B32B27/08B32B27/365B32B27/302
Inventor 野本祐作船崎一男
Owner KURARAY CO LTD