Carrier-free foam master batch and preparation method for same

A foaming masterbatch and carrier-free technology, which is applied in the field of foaming materials, can solve the problems of loss of active ingredients, poor compatibility, violent decomposition, etc., and achieve the goal of improving dispersion performance, accurate content of active ingredients, and improving the degree of dispersion Effect

Active Publication Date: 2014-04-02
广东波斯科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the relatively high melting point of the plastic carrier, it is prone to foaming during the processing process during the production process, and even violent decomposition leading to loss of active ingredients in severe cases.
In addition, due to the poor compatibility of PE or EVA carriers with engineering plastics such as polycarbonate (PC), nylon (PA), polystyrene (PS), and polyethylene terephthalate (PET), etc., Foaming masterbatches containing carriers sometimes lead to adverse phenomena such as delamination

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The synthetic method of the styrene-maleic anhydride-ethyl acrylate terpolymer low-molecular coupling agent in embodiment 1 and embodiment 2 is as follows: take acetone as solvent, with 50g styrene, 100g maleic anhydride and 200g acrylic acid Ethyl ester was dissolved in 1L of acetone, and then dibenzoyl peroxide (BPO) was added dropwise; the temperature was controlled at 80°C, and the reaction was kept for 2 hours; after cooling, methanol was added to precipitate the terpolymer, filtered, washed, and dried Afterwards, the low-molecular coupling agent of the present invention is obtained.

Embodiment 3

[0041] The synthetic method of the styrene-maleic anhydride-butyl acrylate terpolymer low-molecular coupling agent in embodiment 3 and embodiment 4 is as follows: take acetone as solvent, with 50g styrene, 100g maleic anhydride and 180g acrylic acid Butyl ester was dissolved in 1L of acetone, and then dibenzoyl peroxide (BPO) was added dropwise; the temperature was controlled at 80°C, and the reaction was kept for 3 hours; after cooling, methanol was added to precipitate the terpolymer, filtered, washed, and dried Afterwards, the low-molecular coupling agent of the present invention is obtained.

[0042] Example 1

[0043] Weighing and ingredients according to the following formula: low molecular weight coupling agent (styrene-maleic anhydride-ethyl acrylate terpolymer, maleic anhydride content 5%, ethyl acrylate content 20%, softening point 72°C, number average The molecular weight is 20000) 8%, AC foaming agent 20%, zinc oxide 2%, 5000 mesh superfine talcum powder 1%, stea...

Embodiment 2

[0047] Weighing and ingredients according to the following formula: low molecular weight coupling agent (styrene-maleic anhydride-ethyl acrylate terpolymer, maleic anhydride content 10%, maleic anhydride ethyl ester content 5%, softening point 80°C, The number average molecular weight is 8000) 6%, sodium bicarbonate foaming agent 30%, zinc stearate 1%, 5000 mesh superfine talc powder 6%, stearic acid 5% and talc powder 52%.

[0048]The above components were premixed uniformly with a mixer, and then extruded and granulated with a single-screw extruder with a length-to-diameter ratio of 16:1. The temperature of the extruder was set at 60°C, 70°C, 70°C, and 80°C. The host speed is 300 rpm.

[0049] Add 3% of the above foam masterbatch to polystyrene (PS), and prepare polystyrene foam material by extrusion molding method.

[0050] Example 3

[0051] Weighing and ingredients according to the following formula: low molecular weight coupling agent (styrene-maleic anhydride-butyl ...

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PUM

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Abstract

The invention discloses a carrier-free foam master batch and a preparation method for the same. The carrier-free foam master batch is prepared by mixing a low-molecular weight coupling agent which is adopted as an adhesive component with components such as a foaming agent, a foaming nucleating agent, a processing aid and a filling agent and performing extrusion granulation. According to the carrier-free foam master batch and the preparation method for the same, the extrusion granulation temperature of a product is lower than 80 DEG C; the foaming agent is not decomposed in a master batch preparation process, and is high in dispersion degree, so that a foam product with fine and uniform micropores can be prepared during subsequent foaming forming, and has high compatability with engineering plastics; in addition, a high-concentration foam master batch product with foaming agent content of 80 percent can be prepared, a process is simple and convenient, and the production cost is greatly lowered.

Description

technical field [0001] The invention belongs to the field of foam materials, and in particular relates to a carrier-free foam masterbatch and a preparation method thereof. Background technique [0002] Plastic foaming technology is to use the foaming agent to decompose and generate a large amount of gas, which is dispersed in the plastic matrix in the form of micropores, which can reduce the specific gravity of the material, and at the same time play the role of shock absorption, sound absorption, heat insulation and cost reduction. [0003] At present, the most commonly used chemical foaming agents for plastic foaming mainly include azodicarbonamide (AC foaming agent) and sodium bicarbonate. The powder foaming agent has deficiencies such as water absorption, agglomeration, large dust particles and inaccurate metering during use. The foaming masterbatch can be prepared by mixing the foaming agent with the plastic carrier, then melt kneading and extrusion pelletizing. Comp...

Claims

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Application Information

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IPC IPC(8): C08L35/06C08J9/10C08J9/08C08J3/22B29B9/06B29C47/92B29C48/92
CPCB29C48/625B29C48/04B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 阳范文刘鹏卢俊文黎泽顺
Owner 广东波斯科技股份有限公司
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