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Preparation method of ASA (acrylonitrile styrene acrylate) powder

A technology of ASA resin and high rubber powder, applied in the field of preparation of ASA resin high rubber powder, can solve the problems of high rubber powder impact strength, reduced colorability and fluidity, difficult to control reaction rate, difficult to control rubber particle size, etc. Improve the effect of low tinting performance, avoid product defect problems, improve tinting and impact resistance

Active Publication Date: 2014-12-24
淄博华星助剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Bulk polymerization and suspension polymerization are difficult to obtain high-quality products due to the difficulty in controlling the rubber particle size
The emulsion graft polymerization method is beneficial to control the distribution of reaction speed and particle size. The emulsion graft polymerization method can also be divided into one-step polymerization method and multi-step polymerization method. Because the one-step polymerization method is difficult to control the reaction rate, the number of latex particles in the obtained emulsion As the particle size increases and the particle size decreases, the surface area of ​​the latex particles also increases, making it difficult for the shell to cover it, reducing the impact strength, colorability, and fluidity of the ASA resin high-grade rubber powder, which cannot meet user needs.

Method used

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  • Preparation method of ASA (acrylonitrile styrene acrylate) powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The emulsifier used in Example 1 is sodium lauryl sulfate; the initiator is potassium persulfate; the crosslinking agent is dicumyl hydroperoxide; the diameter expander is trisodium phosphate.

[0042] A preparation method for ASA resin high rubber powder, comprising the following steps:

[0043] (1) Add 150g of deionized water, 0.1g of diameter expander, 0.5g of emulsifier, 100g of butyl acrylate and 0.6g of cross-linking agent into the reaction vessel, raise the temperature to 65°C, add 0.1g of initiator, under nitrogen protection React for 5 hours to obtain acrylate seed latex;

[0044](2) Add 150g deionized water, 0.1g diameter expander, 0.5g emulsifier, 100g butyl acrylate and 0.6g crosslinking agent in 20g of acrylate seed latex (solid amount) obtained in step (1), control Warm to 70°C, add 0.1g initiator and react for 5 hours under nitrogen protection to obtain the core layer latex;

[0045] (3) add 20g into the mixture of styrene and acrylonitrile in the core ...

Embodiment 2

[0050] The emulsifier used in Example 2 is sodium dodecylsulfonate; the initiator AIBN and BPO are mixed at a mass ratio of 1:1; the crosslinking agent is dicumyl hydroperoxide; the diameter expander is sodium sulfate.

[0051] A preparation method for ASA resin high rubber powder, comprising the following steps:

[0052] (1) Add 200g of deionized water, 0.4g of diameter expander, 2g of emulsifier, 100g of ethyl acrylate and 1g of crosslinking agent into the reaction vessel, raise the temperature to 70°C, add 0.3g of initiator, and react under nitrogen protection for 5 Hour, obtain acrylate seed latex;

[0053] (2) Add 150g deionized water, 0.5g diameter expander, 1.8g emulsifier, 95g butyl acrylate and 1.8g crosslinking agent to the acrylate seed latex obtained in step (1) (solid content is 35g), Raise the temperature to 72°C, add 0.4g initiator, and react for 4.5 hours under the protection of nitrogen to obtain the core layer latex;

[0054] (3) Add the mixture of 21g styr...

Embodiment 3

[0058] The emulsifier used in Example 3 is sodium dodecylbenzenesulfonate; the initiator is ammonium persulfate; the crosslinking agent is allyl methacrylate; the diameter expander is sodium chloride.

[0059] A preparation method for ASA resin high rubber powder, comprising the following steps:

[0060] (1) Add 200g of deionized water, 0.4g of diameter expander, 1g of emulsifier, 100g of isooctyl acrylate and 1.8g of crosslinking agent into the reaction vessel, raise the temperature to 75°C, add 0.5g of initiator, under nitrogen protection React for 4 hours to obtain acrylate seed latex;

[0061] (2) Add 200g deionized water, 0.3g diameter expander, 1.0g emulsifier, 128g butyl acrylate and 1.0g crosslinking agent to the acrylate seed latex (12g of solid content) obtained in step (1), control Warm to 70°C, add 0.5g initiator, react under nitrogen protection for 5 hours to obtain the core layer latex;

[0062] (3) Add the mixture of 20g styrene and acrylonitrile to the core l...

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Abstract

The invention relates to ASA (acrylonitrile styrene acrylate) powder and a preparation method thereof. The preparation method comprises the following steps: adding de-ionized water, an expanding agent, an emulsifying agent, acrylate monomers, a cross-linking agent and an initiating agent into a reaction container, and reacting to obtain acrylate seed latex; adding the acrylate monomers into the acrylate seed latex, and reacting to obtain core-layer latex; adding styrene and acrylonitrile into the core-layer latex, and compatibilizing and grafting the monomers to the core-layer latex to obtain primary graft polymerization emulsion; mixing the rest of styrene, acrylonitrile, the emulsifying agent and the de-ionized water, and emulsifying to obtain stable emulsion; dropwise adding the emulsion to the primary graft polymerization emulsion containing the initiating agent for reaction, heating for curing to finish a secondary graft polymerization process, adding a compound antioxidant into the polymerization emulsion, and condensing, dehydrating and drying to obtain the ASA powder. According to the preparation method, the reaction speed and the particle size can be satisfactorily controlled, the dyeing property and the impact resistance of a product are improved, and the problem of product defects caused by non-tight coverage of a core layer is avoided.

Description

technical field [0001] The invention relates to a preparation method of ASA resin high rubber powder. Background technique [0002] ASA resin, also called AAS resin, is a ternary graft copolymer composed of acrylate, styrene and acrylonitrile. ASA resin has good weather resistance, mechanical properties, processing properties, etc., and is widely used in the automotive industry, home appliances, and construction industries. [0003] At present, the preparation methods of high-grade ASA resin powder mainly include: emulsion blending method and grafting method. At present, it is mainly prepared by grafting method, which is divided into bulk polymerization method, suspension polymerization method and emulsion polymerization method. Bulk polymerization and suspension polymerization are difficult to obtain high-quality products due to the difficulty in controlling the rubber particle size. Emulsion graft polymerization is beneficial to control the distribution of reaction spee...

Claims

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Application Information

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IPC IPC(8): C08F285/00C08F212/10C08F220/44C08F220/18C08F2/26C08L51/00C08K13/02C08K5/134C08K5/09C08K3/22
Inventor 孔凡高王敬刚王美红徐建光王玉萍孙军伟
Owner 淄博华星助剂有限公司
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