Unlock instant, AI-driven research and patent intelligence for your innovation.
Methacrylic resin composition and molded body
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A methacrylic, resin composition technology, applied in optics, instruments, optical components, etc., can solve the problems of poor molding processability, operability, productivity, weak strength, foaming, etc., and achieves excellent appearance, molding and processing. Excellent effect
Active Publication Date: 2021-06-18
ASAHI KASEI KK
View PDF25 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
[0006] In addition, with the increase in size and thickness of molded products (filming, etc.), molding at high temperatures and residence time at high temperatures become longer, so there is a disadvantage that foaming may occur during molding processing.
[0007] Furthermore, since the heat-resistant acrylic resin is weak in strength and low in toughness, there is a problem that the moldability and workability of the film deteriorate in productivity.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0571] Hereinafter, specific examples and comparative examples are given and described, but the present invention is not limited to these examples.
[0575] ・Methyl methacrylate (MMA): manufactured by Asahi Kasei Chemical Co., Ltd. (as a polymerization inhibitor, 2,4-dimethylformamide manufactured by Chugai Trading Co., Ltd. was added at 2.5 ppm) -6-tert-butylphenol (2,4-di-methyl-6-tert-butylphenol)).
[0576] · N-phenylmaleimide (N-PMI): manufactured by Nippon Shokubai Co., Ltd.
[0577] · N-cyclohexylmaleimide (N-CMI): manufactured by Nippon Shokubai Co., Ltd.
[0578] - Methyl 2-(hydroxymethyl)acrylate (MHMA): manufactured by Combi Bloks.
[0763] In a 1.25m tank equipped with a stirring device with paddle-shaped wings, a temperature sensor, a cooling pipe, and a nitrogen introduction pipe 3 In the reactor, add 432.3kg of methyl methacrylate (MMA), 33.0kg of N-phenylmaleimide (N-PMI), 84.7kg of N-cyclohexylmaleimide (N -CMI), 450.0kg of m-xylene, and 0.28kg of n-octylmercaptan were dissolved to prepare a raw material solution. While blowing nitrogen therein, the temperature was raised to 125°C while stirring.
[0764] Separately, an initiator supply solution obtained by mixing 0.23 kg of Perhexa C-75 and 1.82 kg of m-xylene was prepared.
[0765] When the raw material solution reached 127°C, the supply (addition) of the initiator supply solution (polymerization initiator mixed solution) was started according to the procedures (1) to (6).
[0766] (1) 0.0 to 0.5 hours: the supply rate is 1.00 kg / hour.
[0767] (2) 0.5 to 1.0 hours: the supply rate is 0.50 kg / hour.
[0768] (3) 1.0 to 2.0 hours: the supply rate...
manufacture example 2
[0779] Assuming 380.1kg of methyl methacrylate (MMA), 6.1kg of N-phenylmaleimide (N-PMI), 163.9kg of N-cyclohexylmaleimide (N-CMI), 450 kg of meta-xylene and 0.110 kg of n-octyl mercaptan were carried out in the same manner as in Production Example 1.
[0780] The glass transition temperature of the obtained particles was 145°C.
[0781] In addition, the composition determined by NMR was MMA unit: 71 mass%, N-PMI unit: 1 mass%, N-CMI unit: 28 mass%.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
PUM
Property
Measurement
Unit
glass transition temperature
aaaaa
aaaaa
thickness
aaaaa
aaaaa
thickness
aaaaa
aaaaa
Login to View More
Abstract
An object of the present invention is to provide a methacrylic resin composition which has sufficient optical properties for practical use and is excellent in heat resistance, thermal stability, and molding processability, and a molded article containing the same. The methacrylic resin composition of the present invention is characterized in that it contains methacrylatemonomer units (A): 50 to 97% by mass, and structural units (B) having a ring structure in the main chain: 3 to 30% by mass %, Other vinyl-based monomer units (C) that can be copolymerized with methacrylate monomers: 0 to 20% by mass, methacrylic resins meet specific conditions, and are heated at 280°C in a nitrogen environment The weight average molecular weight residual rate after 1 hour is 80% or more, and the weight average molecular weight residual rate after heating at 280° C. in air for 0.5 hour is 80% or more.
Description
technical field [0001] The present invention relates to an improved methacrylic resin composition and a molded article containing the methacrylic resin composition. Background technique [0002] In recent years, with the expansion of the display market, there has been an increasing demand for clearer viewing of images, and optical materials that impart higher optical characteristics in addition to transparency, heat resistance, and strength are required. [0003] Acrylic resins ((meth)acrylate polymers) have attracted attention as the aforementioned optical materials from the viewpoint of transparency, surface hardness, optical properties, and the like. [0004] Conventionally, it has been reported that, among acrylic resins, especially by copolymerizing glutaric anhydride (for example, see Patent Document 1), maleic anhydride (for example, see Patent Document 2) and the like with (meth)acrylate monomers, it has been reported that Acrylic resins with improved heat resistanc...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More