Process for Producing Polymer Composition

A composition and polymer technology, applied in the field of polymer composition production, can solve problems such as high viscosity, lowering the quality of polymer composition resin composition, difficulty in reaction control, etc., and achieve effective production, high thermal stability, and effective quality Effect

Active Publication Date: 2012-09-19
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Actually, however, continuous bulk polymerization has various problems compared with continuous solution polymerization, such as difficulty in reaction control because of the high viscosity of the reaction mixture, and when the inner surface of the reactor is cooled to take heat out of the reaction system, This reduces the quality of the polymer composition and thus the resin composition obtained therefrom

Method used

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  • Process for Producing Polymer Composition

Examples

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Effect test

Embodiment 1

[0166] In this example, roughly, refer to figure 1 Continuous polymerization is carried out in two stages according to the embodiment described above to produce a polymer composition (resin composition) in the form of pellets. More specifically, this is as follows.

[0167] By mixing 98.606 parts by mass of methyl methacrylate and 0.987 parts by mass of methyl acrylate, and adding 0.284 parts by mass of n-octyl mercaptan (as a chain transfer agent), and 0.123 parts by mass of stearin Alcohol (as a release agent) to prepare the raw material monomer mixed liquid 1.

[0168] Polymerization initiator mixed liquid 1 was prepared by mixing 99.820 parts by mass of methyl methacrylate, and 0.180 parts by mass of t-amyl peroxy-2-ethylhexanoate as a polymerization initiator.

[0169] A polymerization initiator mixed liquid 2 was prepared by mixing 99.840 parts by mass of methyl methacrylate, and 0.160 parts by mass of 1,1-bis(t-butylperoxy)cyclohexane as a polymerization initiator.

...

Embodiment 2

[0186] In this example, a polymer composition was produced in the form of pellets similarly to Example 1 except for the following.

[0187] Polymerization initiator mixed liquid 1 was prepared by mixing 99.790 parts by mass of methyl methacrylate, and 0.210 parts by mass of t-amyl peroxy-2-ethylhexanoate as a polymerization initiator.

[0188] A polymerization initiator mixed liquid 2 was prepared by mixing 99.860 parts by mass of methyl methacrylate, and 0.140 parts by mass of 1,1-bis(tert-butylperoxy)cyclohexane as a polymerization initiator.

[0189] The temperature in the first reactor 10 was 140°C, and the temperature of the jacket 13 surrounding the outer surface of the first reactor 10 was 140°C in order to carry out continuous polymerization under adiabatic conditions substantially without heat transfer. Further, it was controlled using a jacket formed on the connecting line 15 so that the intermediate composition flowing through the inside of the connecting line 15 wa...

Embodiment 3

[0192] In this example, a polymer composition was produced in the form of pellets similarly to Example 1 except for the following.

[0193] Polymerization initiator mixed liquid 1 was prepared by mixing 99.807 parts by mass of methyl methacrylate, and 0.193 parts by mass of t-amyl peroxy-2-ethylhexanoate as a polymerization initiator.

[0194] A polymerization initiator mixed liquid 2 was prepared by mixing 99.920 parts by mass of methyl methacrylate, and 0.080 parts by mass of 1,1-bis(tert-butylperoxy)cyclohexane as a polymerization initiator.

[0195] The temperature in the first reactor 10 was 150°C, and the temperature of the jacket 13 surrounding the outer surface of the first reactor 10 was 150°C in order to carry out continuous polymerization under adiabatic conditions substantially without heat transfer. Further, it was controlled using a jacket formed on the connecting line 15 so that the intermediate composition flowing through the inside of the connecting line 15 wa...

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Abstract

The present invention is directed to a process for producing a polymer composition which is able to more efficiently produce the polymer composition with high quality. The process for producing a polymer composition conducts a first polymerization step by supplying a raw material monomer and a polymerization initiator to a first reactor of a complete mixing type (10) through its supply port (11a) to be subjected to continuous polymerization under an adiabatic condition in the first reactor (10), and taking a resultant intermediate composition from an effluent port (11b) located at the top of the first reactor (10); and a second polymerization step by supplying the intermediate composition to a second reactor of a complete mixing type (20) through its supply port (21a) to be further subjected to continuous polymerization under an adiabatic condition in the second reactor (20), and taking a resultant polymer composition from an effluent port (21b) located at the top of the second reactor (20), wherein the first polymerization step is conducted at a temperature from 125 to 170 DEG C, and the second polymerization step is conducted at a temperature from 130 to 180 DEG C.

Description

technical field [0001] The present invention relates to a method for producing a polymer composition, and more particularly, to a method for producing a polymer composition by continuous polymerization. Background technique [0002] A resin composition such as a methacrylate polymer is produced by continuous polymerization in which a raw material polymer, a polymerization initiator, etc. are continuously fed to a reactor for polymerization. As such a continuous polymerization method, there are known a continuous solution polymerization method in which continuous polymerization is performed using a solvent (or a dispersion medium, which is also applicable hereinafter), and a continuous bulk polymerization method in which continuous polymerization is performed without using a solvent. [0003] In general, continuous solution polymerization processes are not efficient because of the low productivity caused by the use of solvents. In contrast, the continuous bulk polymerization...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/02C08F20/10C08L33/04
CPCC08F2/001C08F2/01C08F222/1006C08F220/14C08F222/102C08F2/02C08F20/10C08J5/00
Inventor 隅田将一山崎和广佐藤嘉记和气孝雄
Owner SUMITOMO CHEM CO LTD
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