KR-20260065889-A - Method for preparing composition, polymer, cured product, molded body and polymethyl methacrylate

Abstract

The object of the present invention is to provide a composition having excellent storage stability, a polymer, a cured product, and a molded article obtained using the composition, and a method for manufacturing polymethyl methacrylate using the composition. The present invention relates to a composition containing methyl methacrylate and toluene, wherein the concentration of toluene exceeds 0 mass ppm of the total composition and is less than 1000 mass ppm.

Inventors

• 야스토미 요이치
• 가도야 히데노리

Assignees

• 스미또모 가가꾸 가부시키가이샤

Dates

Publication Date

20260511

Application Date

20240807

Priority Date

20230904

Claims (13)

1. Contains methyl methacrylate and toluene, A composition in which the concentration of toluene exceeds 0 mass ppm and is less than 1000 mass ppm of the total composition.
2. In Article 1, A composition having a content of methyl methacrylate of 85 mass% or more of the total composition.
3. In Article 1, A composition having a content of methyl methacrylate of 90 mass% or more of the total composition.
4. In Article 1, A composition in which the concentration of toluene is 5 mass ppm to 700 mass ppm of the total composition.
5. In Article 1, A composition in which the concentration of toluene is 100 mass ppm to 600 mass ppm of the total composition.
6. In Article 1, A composition comprising methyl methacrylate, regenerated methyl methacrylate or bio-derived methyl methacrylate.
7. In Article 1, A composition further comprising (meth)acrylic acid esters other than methyl methacrylate.
8. In Article 1, A composition further comprising a polymer comprising structural units derived from methyl methacrylate.
9. A polymer comprising a structural unit derived from methyl methacrylate included in a composition described in any one of claims 1 to 8.
10. A molded body comprising the polymer described in claim 9.
11. A cured product of the composition described in any one of claims 1 to 8.
12. A molded body comprising the cured material described in claim 11.
13. A method for manufacturing polymethyl methacrylate, comprising a process of polymerizing methyl methacrylate included in a composition described in any one of claims 1 to 8.

Description

Method for preparing composition, polymer, cured product, molded body and polymethyl methacrylate The present disclosure relates to a composition, a polymer, a cured product, a molded body, and a method for manufacturing polymethyl methacrylate. Poly(meth)acrylate methyl, obtained by polymerizing (meth)acrylate methyl, is used in various fields as a resin material with excellent transparency and weather resistance. Furthermore, due to the recent rise in resource prices and the increasing awareness of environmental issues, products (molded articles) containing poly(meth)acrylate methyl used for the various purposes mentioned above are being recovered and recycled. Methods for recycling poly(meth)acrylate methyl include, for example, material recycling, in which a new molded body is manufactured by performing a molding process again on the recovered molded body; chemical recycling, in which (meth)acrylate methyl is recovered by heat-treating the recovered molded body to thermally decompose (depolymerize) poly(meth)acrylate methyl, and a new molded body is manufactured using the recovered (meth)acrylate methyl (meth)acrylate (which may be referred to as regenerated MMA or regenerated MA); and thermal recycling, in which the recovered molded body is burned as fuel to directly use the combustion energy as a heat source, and further, to use the combustion energy to generate electricity. In addition, due to the recent diversification of applications for poly(meth)acrylate, technologies to improve the quality of poly(meth)acrylate are being considered. For example, as a polymerization apparatus suitable for obtaining high-quality poly(meth)acrylate methyl, a polymerization apparatus is proposed in which the formation of gels in a reaction vessel in which raw monomers and polymerization initiators are reacted is suppressed (see Patent Document 1). Figure 1 is a graph showing the relationship between the toluene concentration and the average transmittance of the composition prepared in the example. Embodiments of the present invention are described below. However, the present invention is not limited to the following embodiments. In the numerical range indicated by "~" in this specification, the numerical values listed before and after "~" are included as the minimum value and the maximum value, respectively. In numerical ranges described stepwise in this specification, an upper or lower limit value described in one numerical range may be substituted with an upper or lower limit value of another numerical range described stepwise. Additionally, in numerical ranges described in this specification, an upper or lower limit value of said numerical range may be substituted with a value shown in the examples. <Composition> The composition of the present disclosure contains methyl methacrylate and toluene, and The composition is one in which the concentration of toluene exceeds 0 ppm by mass of the total composition and is less than 1000 ppm by mass. The composition of the present disclosure may be in a liquid form or in a solid form such as pellets. In the case of a liquid form, it may be, for example, a monomer composition or may contain a polymer of monomers such as a syrup. As shown in the examples described below, the composition of the present disclosure has excellent storage stability. (Methyl methacrylate) The composition of the present disclosure comprises methyl methacrylate. In the present disclosure, "methyl methacrylate" refers to methyl methacrylate that essentially does not contain impurities, such as by-products generated during the synthesis of methyl methacrylate. However, the methyl methacrylate in the present disclosure is not limited thereto, provided that it does not impair the purpose of the invention. In other words, "methyl methacrylate" may contain impurities that cannot be completely removed by a purification method according to conventional methods, or may contain impurities in an amount that cannot be detected by a detection method according to conventional methods. The content of methyl methacrylate in the composition is not particularly limited and can be selected according to the use of the polymethyl methacrylate obtained using the composition. The content of methyl methacrylate may be, for example, 85 mass% or more, 90 mass% or more, 95 mass% or more, or 99 mass% or more of the total composition. If the content of methyl methacrylate in the composition is within the above range, it is desirable in terms of at least heat resistance or transparency (light transmittance) for the polymer produced by polymerizing the composition and the molded article containing it. The methyl methacrylate included in the composition may be synthesized by a known synthesis method. The synthesis method is not particularly limited and may be the ACH method, the C4 direct acid method, or the alpha method. The methyl methacrylate included in the composition may include regenerated methyl methacrylate. In the present