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Method for preparing adhesive acrylic ester polymer syrup

A technology of acrylates and polymers, applied in the direction of adhesive types, ester copolymer adhesives, etc., can solve the problems of discontinuous reaction, yield and economic disadvantage, and achieve reduction of polymerization time, improvement of yield, increase of The effect of degree of aggregation

Inactive Publication Date: 2007-08-01
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, it is unfavorable in terms of productivity and economy because the reaction is carried out discontinuously

Method used

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  • Method for preparing adhesive acrylic ester polymer syrup

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] In the monomer solution reservoir 1, 96 wt% of 2-ethylhexyl acrylate and 4 wt% of acrylic acid as monomers and 0.08 wt% of pentaerythritol tetrakis(3-mercapto)propionate as a molecular weight modifier were mixed, To prepare 6kg of monomer solution. Likewise, in the initiator solution reservoir 2, 96 wt% of 2-ethylhexyl acrylate and 4 wt% of acrylic acid as monomers, 0.08 wt% of tetrakis(3-mercapto)propionic acid as a molecular weight regulator were mixed Pentaerythritol ester and 0.0004 wt % of 2,2'-azobis(diisobutyronitrile) (AIBN) as an initiator to prepare 2 kg of an initiator solution.

[0057] The monomer solution in the monomer solution reservoir 1 and the initiator solution in the initiator solution reservoir 2 were bubbled with 700 mL / min nitrogen for 30 minutes in the monomer solution reservoir 1 and the initiator solution reservoir 2 respectively , to keep the dissolved oxygen in the accumulator at 0.8ppm. The temperature of the monomer solution and the init...

Embodiment 2

[0062] Except that 0.00025 wt% AIBN was used as the initiator, the polymerization temperature was kept at 100 °C, the monomer solution and the initiator solution were supplied at an average rate of 8.7 g / min and 2.1 g / min, respectively, and the average residence time was kept at 2.3 hours, Acrylate polymer syrup was prepared in the same manner as in Example 1.

Embodiment 3

[0064] In addition to 0.00025wt% of 1,1-bis(tert-butylperoxide)3,3,5-trimethylcyclohexane as initiator, the polymerization temperature was kept at 125°C, at 8g / min and 2g / min respectively The average speed of supplying the monomer solution and the initiator solution and the average residence time were kept at 2.5 hours, and the acrylate polymer slurry was prepared in the same manner as in Example 1.

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Abstract

The present invention relates to a method for preparing an acrylic ester polymer syrup by bulk polymerization, and more particularly, to a method for preparing an acrylic ester polymer syrup, which comprises the steps of: supplying a monomer solution and an initiator solution to a monomer solution reservoir and an initiator solution reservoir, respectively; supplying the monomer solution and the initiator solution to a complete-mixing type continuous reactor, while maintaining the dissolved oxygen in the monomer solution reservoir and the initiator solution reservoir at 0.0001 to 3 ppm, separately or after mixing prior to the supply; and performing bulk polymerization continuously while maintaining the solution mixture supplied to the continuous reactor at 70 to 150 DEG C and 1 to 10 atm, with a mean residence time of 30 to 240 minutes. In accordance with the present invention, an acrylic ester polymer syrup can be obtained with a degree of polymerization of 20 to 70 % at a low polymerization temperature, even with a small amount of initiator. Productivity can be improved by reducing reaction time with the use of an initiator having a short half-life and polymerization can be performed very stably and continuously without gelation.

Description

technical field [0001] The present invention relates to the method for preparing acrylate polymer syrup by bulk polymerization, more particularly, relate to the method for preparing acrylate polymer syrup with bulk polymerization, even if use a small amount of initiator, this method also can be at low polymerization temperature at 20 ~70% degree of polymerization polymerizes acrylate polymer syrup, the method can increase the yield by reducing the reaction time by using an initiator with a short half-life, and the method can stably and continuously carry out the polymerization reaction without gelation. Background technique [0002] Typically, acrylate polymer syrups are amorphous, transparent thermoplastic polymers. It is used in various applications including adhesive sheets, protective coating films, adhesives, etc. due to its excellent transparency and easy-to-adjust adhesiveness. [0003] Previously, acrylate polymer syrups were prepared by a variety of methods includi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/02
CPCC09J133/06C08F2/02C08F20/10C08F20/06
Inventor 朴钟瑞崔善赫崔廷旭
Owner LG CHEM LTD
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