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Polrvinyl chloride heat-resistance modifier and preparation method thereof

A technology of heat-resistant modifier and polyvinyl chloride, which is applied in the field of polyvinyl chloride heat-resistant modifier and its preparation, can solve the problems of low heat distortion temperature, poor thermal stability, and high brittleness, and achieve simple processing technology, The effect of good particle shape and low cost

Active Publication Date: 2012-11-21
SHANDONG SHUNTIANLI PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As we all know, the usual polyvinyl chloride (PVC) processing has the following disadvantages: high brittleness, poor thermal stability, low heat distortion temperature, and Vicat softening point is only about 85 °C
Acrylonitrile monomers are highly toxic, and there is a certain risk in the production process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The raw material mass ratio of methyl methacrylate, α-methylstyrene, N-phenylmaleimide is 30: 30: 40, and the preparation method of heat-resistant modifier is as follows:

[0028] (1) Monomer preparation: Add methyl methacrylate and α-methylstyrene into the configuration tank, start stirring, slowly add N-phenylmaleimide into it, stir for half an hour, wait for N-phenyl Basemaleimide is all dissolved and then used;

[0029] (2) Preparation of polymerization aids:

[0030] a. Initiator solution preparation: the initiator is prepared into an aqueous solution with a mass ratio of 3% for use, and the initiator adopts peroxide;

[0031] b. Preparation of emulsifier solution: add water and emulsifier in the configuration tank, the mass ratio is 85:15, stir evenly at room temperature, and use potassium hydroxide to adjust the pH value of the emulsifier solution to 9-10 for later use, emulsify The agent adopts alkyl sulfate or alkyl sulfonate;

[0032] (3) Aggregation:

[0...

Embodiment 2

[0038] The preparation method is the same as in Example 1, and the raw material mass ratio of methyl methacrylate, α-methylstyrene and N-phenylmaleimide is 35:35:30.

Embodiment 3

[0040] The preparation method is the same as in Example 1, and the raw material mass ratio of methyl methacrylate, α-methylstyrene, and N-phenylmaleimide is 37.5:37.5:25.

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PUM

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Abstract

The invention discloses a polrvinyl chloride heat-resistance modifier and a preparation method thereof. The heat-resistance modifier is a methyl methacrylate-alpha-methyl styrene-N-phenylmaleimide terpolymer. Methyl methacrylate and alpha-methyl styrene account for 60 to 80 percent of the total mass of the modifier, N-phenylmaleimide terpolymer accounts for 20 to 40 percent of the total mass of the modifier, and the mass ratio of methyl methacrylate to alpha-methyl styrene is 1:1; and in a polymerization process, the mass ratio of monomer to water is (30-40):(60-70), the polymerization temperature is 60 to 80 DEG C, a peroxide initiator, an alkyl sulfate or alkane sulfonate emulsifier and a thiol molecular weight regulator are added at the same time, the reaction time is 6 to 9 hours, anda pressure type spray dryer is used for spray drying in a post-treatment process. Compared with the conventional heat-resistance modifier, the performance is high, the form of product particles is desirable, the yield is high, fewer raw material varieties are adopted, the cost is low, the spray drying post-treatment process is simple, and the Vicat softening point of the prepared heat-resistance modified resin is obviously improved, and the processability is high.

Description

technical field [0001] The invention belongs to the field of modifier preparation, and in particular relates to a polyvinyl chloride heat-resistant modifier and a preparation method thereof. Background technique [0002] As we all know, the usual polyvinyl chloride (PVC) processing has the following disadvantages: high brittleness, poor thermal stability, low heat distortion temperature, and Vicat softening point is only about 85°C. These disadvantages limit the scope of use of PVC resin. Although the use of CPE, MBS, ACR and other additives basically solves the impact resistance and processability problems of PVC, it fails to solve the heat resistance problem. [0003] For this reason, people have adopted the method of preparing chlorinated polyvinyl chloride (CPVC) to modify, although this method can increase the glass transition temperature of PVC, but its thermal stability, processability and impact resistance have declined, and the application Subject to certain restr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08L33/12C08F220/14C08F212/12C08F222/40C08F2/26C08F2/38
Inventor 卢晓于元章路玉滨路玉海李毅璞
Owner SHANDONG SHUNTIANLI PLASTIC
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