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Lactone ring-containing polymer having few foreign matters and not easily causing gelation, and its applications

A polymer and lactone ring technology, applied in the preparation of organic compounds, organic chemistry, carboxylate preparation, etc., can solve the problems of high weight average molecular weight, polymer gel, etc., and achieve excellent optical parts, and heat resistance Excellent performance and excellent transparency

Active Publication Date: 2007-02-14
NIPPON SHOKUBAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition, in conventional production methods, for example, as described in Examples of Patent Document 1, t-butyl-type peroxides are generally used as polymerization initiators, but such polymerization initiators are separated from polymer molecular chains. The ability to abstract hydrogen in the medium is strong, which causes the branching of the polymer molecular chain or intermolecular cross-linking, so that the polymer gel is also prone to occur.
[0006] Furthermore, in the examples of Patent Document 2, an experimental example using a tert-amyl-type peroxide and an azo-based initiator is described, but the obtained polymer has a relatively high weight-average molecular weight of 180,000 to 500,000. In this molecular weight region, it is easy to produce polymer gel

Method used

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  • Lactone ring-containing polymer having few foreign matters and not easily causing gelation, and its applications
  • Lactone ring-containing polymer having few foreign matters and not easily causing gelation, and its applications
  • Lactone ring-containing polymer having few foreign matters and not easily causing gelation, and its applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0200] Into a tank-type reactor with a capacity of 30 L equipped with a stirring device, a temperature sensor, a cooling pipe, and a nitrogen introduction pipe, 8,000 g of methyl methacrylate (MMA), 2,000 g of 2-hydroxymethyl methacrylate (MHMA; prepared in Synthesis Example 1), 10,000 g of toluene, while passing nitrogen gas into it, while raising the temperature to 105 ° C, under reflux conditions, add 10.0 g of tert-amyl peroxide isononyl peroxide as a polymerization initiator acid ester (Lupazolu 570, manufactured by Atofina Gifu Co., Ltd.), while spending 2 hours dropping a solution formed by 20.0 g of tert-amylperoxyisonononanoate and 100 g of toluene, under reflux at about Solution polymerization was performed at 105 to 110° C., followed by aging for 4 hours.

[0201] Add 10 g of stearyl phosphate / distearyl phosphate mixture (Phoslex A-18, manufactured by Sakai Chemical Industry Co., Ltd.) to the obtained polymer solution, and perform 5-hour reflux at about 90 to 110° C...

Embodiment 2

[0206] Into a tank-type reactor with a capacity of 30 L equipped with a stirring device, a temperature sensor, a cooling pipe, and a nitrogen introduction pipe, 8,000 g of methyl methacrylate (MMA), 2,000 g of 2-hydroxymethyl methacrylate (MHMA; prepared in Synthesis Example 2), 10,000 g of toluene, 5.0 g of n-dodecyl mercaptan, while passing nitrogen gas into it, while raising the temperature to 100 ° C, under the condition of reflux, add as a polymerization initiator 10.0 g of tert-amyl peroxy-isonononanoate (ルパゾ-ル570, manufactured by Atofina Jifu Co., Ltd.), while spending 2 hours dropwise adding 20.0 g of tert-amyl peroxy-isononanoate and 100 g of toluene The formed solution was subjected to solution polymerization at about 95 to 110° C. under reflux, and further aged for 4 hours.

[0207] Add 10 g of stearyl phosphate / distearyl phosphate mixture (Phoslex A-18, manufactured by Sakai Chemical Industry Co., Ltd.) to the obtained polymer solution, and carry out circulation at...

Embodiment 3

[0212] Into a tank-type reactor with a capacity of 30 L equipped with a stirring device, a temperature sensor, a cooling pipe, and a nitrogen introduction pipe, 8,000 g of methyl methacrylate (MMA), 2,000 g of 2-hydroxymethyl methacrylate (MHMA; prepared in Synthesis Example 1), 10,000 g of toluene, while passing nitrogen gas into it, while raising the temperature to 105 ° C, under the condition of reflux, add 5.0 g of 1,1'-azo Bis(cyclohexane-1-carbonitrile) (V-40, manufactured by Wako Pure Chemical Industries, Ltd.), while spending 2 hours dropping 10.0 g of 1,1'-azobis(cyclohexane- 1-carbonitrile) and 100 g of toluene, solution polymerization was carried out at about 105-110° C. under reflux, and aging was carried out for 4 hours.

[0213] 10 g of stearyl phosphate / distearyl phosphate mixture (Phoslex A-18, manufactured by Sakai Chemical Industry Co., Ltd.) was added to the obtained polymer solution, and the reaction was carried out at about 90 to 110° C. under reflux for 5...

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Abstract

The lactone ring-containing polymer of the present invention meets the following conditions that: the content of polymer gels of 50 mum or greater in average particle diameter is lower than or equal to 100 pieces / 100 g, and the weight average molecular weight of the polymer is 50,000 to 170,000; and / or an increasing rate of viscosity after heated at 280 DEG C for 30 minutes is 2.0 times or smaller. The lactone ring-containing polymer of the present invention contains very few foreign matters and does not easily cause gelation, in addition to being excellent in transparency and heat resistance as well as having the desired properties such as mechanical strength and forming and processing properties. The forming material obtained by heating and granulating such a polymer are suitable for use in, for example, optical components such as light guide materials, optical lenses, and optical films.

Description

technical field [0001] The present invention relates to a lactone ring-containing polymer that has few foreign substances and is difficult to gel and uses thereof. Background technique [0002] Conventionally, methacrylic resins have been known as transparent resins. Methacrylic resins not only have good transparency, but also have excellent surface gloss and weather resistance, and can achieve a balance of mechanical strength, moldability, and surface hardness. Therefore, they are widely used in optical-related components such as automobiles and home appliances. in use. However, since the glass transition temperature of methacrylic resin is about 110 degreeC, it is difficult to use it in the field which requires heat resistance. [0003] As a transparent heat-resistant resin having transparency and heat resistance, and further having various characteristics such as mechanical strength and moldability, it has recently been proposed that a polymer having a hydroxyl group an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F120/06C08F8/16C08F8/48C08F2/06G02B1/04
CPCC08F8/16C08F220/26C08F220/18C07C67/60C07C69/732
Inventor 上田贤一乙咩重男前田顺启中西秀高和泉博子长野英明
Owner NIPPON SHOKUBAI CO LTD