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Polymer using methyl methacrylate as main component

A technology of methyl methacrylate and polymers, applied in the field of polymers, can solve problems such as high cost and difficult production, achieve high upper limit temperature, good thermal cracking resistance, high thermal cracking temperature and heat resistance temperature Effect

Inactive Publication Date: 2007-05-16
CHI MEI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods are relatively difficult and costly in production, so up to now the industry has not carried out mass production with these technologies to manufacture polymethyl methacrylate

Method used

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  • Polymer using methyl methacrylate as main component

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Using methyl methacrylate monomer as a reactive monomer, it was purified twice by vacuum distillation, and then stored below 5°C.

[0058] Get 100 milliliters (0.93 moles) of purified methyl methacrylate monomer, 0.02 grams (0.00012 moles) of 2,2'-azobisisobutyronitrile, 2.0 grams (0.018 moles) of ε-caprolactam, and N-dodecyl mercaptan 0.05 gram (0.00025 mole), (the mol ratio=0.49:1 of above-mentioned free radical starter and mercaptan compound; The mol ratio=72 of lactam compound and mercaptan compound: 1; and the molar ratio of mercaptan compound and free radical polymerizable monomer=0.027:100), under nitrogen atmosphere, add in the glass reactor with stirring device, start timing to carry out polymerization reaction, wherein above-mentioned glass reactor has been Put it in a water tank in advance, the temperature of the water bath is 90°C, and take samples at intervals after the polymerization starts, add methanol immediately after sampling to stop the reaction, pre...

Embodiment 2

[0062] Same as in Example 1, the amount of each component used is 100 milliliters (0.93 moles) of methyl methacrylate monomer, 0.05 grams (0.00020 moles) of 2,2'-azobis(2,4-dimethylvaleronitrile) ), n-dodecyl mercaptan 0.12 gram (0.00059 mole), ε-caprolactam 5.0 gram (0.044 mole), water bath temperature is 70 ℃, the data of conversion rate and molecular weight are shown in Table 2. In addition, the glass transition temperature of the dried product with a reaction time of 60 minutes was 124° C., the temperature of 5% weight loss was 335° C., and the syndiotactic structure content was 58 mol%.

[0063] Table 2 - Example 2

[0064] time (minutes)

Embodiment 3

[0066] Same as in Example 1, the amount of each component used is 100 milliliters (0.93 moles) of methyl methacrylate monomer, 0.03 grams (0.00020 moles) of 2,2'-azobis(2,4-dimethylvaleronitrile) ), n-dodecyl mercaptan 0.07 gram (0.00035 mole), 2-pyrrolidone 3 grams (0.035 mole), water bath temperature is 80 ℃, the data of conversion rate and molecular weight are as table 3. In addition, the glass transition temperature of the dried product with a reaction time of 70 minutes was 125° C., the temperature of 5% weight loss was 335° C., and the syndiotactic structure content was 59 mol%.

[0067] Table 3 - Example 3

[0068] time (minutes)

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Abstract

A polymer containing perspex as its main component features that the content of its syndiotactic structure is 55 mole% and its weight decreasing temp is 290 deg.C or higher for the 5 Wt%. Its advantage is high resistance to thermocracking and high temp.

Description

technical field [0001] The present invention is a polymer with methyl methacrylate (Methyl methacrylate) as the main component, which has a higher heat-resistant cracking temperature and heat-resistant temperature; that is, when using the methyl methacrylate polymer of the present invention , the thermal cracking resistance of its melt processing is better, the upper limit temperature of the molded products is higher, and the mechanical strength is good. Background technique [0002] Polymethyl methacrylate (Polymethyl methacrylate) is a polymer with a wide range of uses. Because of its good transparency and weather resistance, it is often used to make various optical components or consumer products, such as camera lenses, lenses, and car taillights. , Kanban, etc.; and because the general glass will reduce the transparency as the thickness increases, so in some occasions that require high light transmittance and large thickness to ensure structural safety, so that glass can...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F20/14
Inventor 陈志勇胡毓祥王振乾黄耀辉黄辰宝郑贵伦
Owner CHI MEI CORP
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