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(METH) acrylic resin composition and (METH) acrylic resin film

A technology based on methyl methacrylate and acrylic, applied in the field of acrylic resin film, can solve the problems of lower productivity, loss of beautiful color tone and transparency, contamination of cooling rolls, etc., and achieve an excellent effect of gel fraction

Pending Publication Date: 2021-02-23
FUJIMORI KOGYO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In addition, Patent Document 2 discloses a method of improving the impact resistance, which is an essential disadvantage of acrylic resins, by not containing a rubber-containing graft copolymer that would lead to acrylic resins. Resin-like advantages of unique beautiful color tone and loss of transparency
The acrylic resin composition of the invention described in Patent Document 2 solves the problem that the graft copolymer thermally decomposes when the melt extrusion temperature is increased when the resin composition is formed into a film by a melt extrusion method. , and the resulting decomposition gas or exudate will contaminate cooling rolls such as casting rolls and reduce productivity

Method used

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  • (METH) acrylic resin composition and (METH) acrylic resin film
  • (METH) acrylic resin composition and (METH) acrylic resin film
  • (METH) acrylic resin composition and (METH) acrylic resin film

Examples

Experimental program
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preparation example Construction

[0040] The method for producing the acrylic polymer is not particularly limited, and an appropriate known polymerization method such as a solution polymerization method or an emulsion polymerization method can be used. The acrylic polymer is preferably a copolymer with a weight average molecular weight greater than 100,000 and less than 1 million, more preferably a copolymer with a weight average molecular weight greater than 100,000 and less than 950,000, particularly preferably a weight average molecular weight greater than 100,000 And it is a copolymer of less than 900,000. If the weight-average molecular weight of the acrylic polymer is 100,000 or less, even if the (meth)acrylic resin composition is crosslinked, it is difficult to obtain a molded article such as a (meth)acrylic resin film having excellent physical properties. . When the weight average molecular weight of the said acrylic polymer exceeds 1 million, the solution of a (meth)acrylic resin composition will bec...

Embodiment 1

[0082] Nitrogen gas was introduced into a reaction device equipped with a stirrer, a thermometer, a reflux condenser, and a nitrogen gas introduction tube to replace the air in the reaction device with nitrogen gas. Then, 95 parts by weight of methyl methacrylate, 5 parts by weight of methyl acrylate, 3.0 parts by weight of 8-hydroxyoctyl acrylate, and a solvent (ethyl acetate) were simultaneously added to the reaction device. Thereafter, 0.1 parts by weight of azobisisobutyronitrile as a polymerization initiator was added dropwise, followed by heating to 65° C. and reacting for a predetermined time to obtain the (meth)acrylic polymer solution of Example 1. When the weight average molecular weight (Mw) of the (meth)acrylic polymer contained in this (meth)acrylic polymer solution was measured, it was 200,000. To the (meth)acrylic polymer solution of Example 1, 3.0 parts by weight of CORONATE HX (isocyanurate body of a hexamethylene diisocyanate compound) was added and mixed wit...

Embodiment 2～5 and comparative example 1～2

[0084] Example 1 was obtained in the same manner as in Example 1, except that the compositions of the (meth)acrylic polymer and the (meth)acrylic resin composition of Example 1 were adjusted to the compositions listed in Table 1 The (meth)acrylic polymer and (meth)acrylic resin composition of 2-5 and Comparative Examples 1-2. Table 1 shows the weight average molecular weight (Mw) of the (meth)acrylic polymer of Examples 2-5 and Comparative Examples 1-2.

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Abstract

Provided are a (meth) acrylic resin composition and a (meth) acrylic resin film which can be used in a solution casting method for obtaining a resin film having a thin film thickness, and which have excellent folding resistance, cutting resistance (tensile breaking strength), elongation at break, and solvent resistance (gel fraction).

Description

technical field [0001] The present invention relates to a (meth)acrylic resin composition suitable for forming a (meth)acrylic resin film, etc., and a (meth)acrylic resin using the (meth)acrylic resin composition membrane. Background technique [0002] Conventionally, (meth)acrylic resin films have been used in various equipment such as electronic equipment, home appliances, automotive interior and exterior parts, and building components due to their high transparency, heat processability, weather resistance, and chemical resistance. A resin film covering the surface of the part. [0003] In addition, in recent years, (meth)acrylic resin films have been used as optical films because they are excellent in high transparency, weather resistance, and the like. [0004] Conventionally, as a method of producing a (meth)acrylic resin film (PMMA film) composed of polymethyl methacrylate (PMMA) resin, a method of forming a film of PMMA resin by a melt extrusion method has been adop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/12C08J5/18C08J3/24C09J7/24G02B5/30
CPCC08L33/066C08L33/064C08J5/18C08J3/24C09J7/24G02B5/305C08J2333/12C09J2433/006C08L2312/00C08L33/12C08L33/06C08K5/0025C08J2433/06
Inventor 长仓毅客野真人广神萌美
Owner FUJIMORI KOGYO CO LTD
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