Synthesis method of ASA

A synthesis method and technology for synthesizing cross-linked acrylate, applied in the field of polymer materials, can solve the problems of poor impact resistance and difficult adjustment of ASA, improve impact resistance and aging resistance, prolong service life, and improve flame retardancy. performance effect

Pending Publication Date: 2020-09-11
江西岳峰集团高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The formula and preparation method of the flexible and highly weather-resistant ASA material in the above-mentioned patents have the following disadvantages: when the ASA resin is prepared by the emulsion blending method, various parameters such as the particle size of the rubber phase and its distribution are not easy to adjust, resulting in the impact resistance of the obtained ASA poor

Method used

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  • Synthesis method of ASA
  • Synthesis method of ASA

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Experimental program
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Effect test

Embodiment 1

[0034] The synthetic method of ASA, such as figure 1 shown, including the following steps:

[0035] S1: Synthesis of cross-linked acrylate latex: using acrylate with small particle size as seeds, add 0.5 parts of emulsifier, 0.3 parts of cross-linking agent, and 1 part of initiator, heat up to 80°C, and react for 2 hours;

[0036] S2: Agglomeration: Add acrylate monomer under the protection of nitrogen to enlarge the particle size of latex to obtain PBA latex with larger particle size;

[0037] S3: Emulsion graft copolymerization: Add 30 parts of styrene / acrylonitrile mixed monomer and 0.5 part of initiator to the acrylate seed latex, then add the styrene / acrylonitrile mixture dropwise to the PBA latex at 25 parts / Add dropwise at a speed of h and complete the dropwise addition within 2 hours, add 1.5 parts of antioxidant, 0.2 parts of lubricant and 10 parts of halogen-free flame retardant, heat up to 80°C, stir at 500 rpm for 6 minutes, and react for 2 hours. get the mixtur...

Embodiment 2

[0057] The synthetic method of ASA, such as figure 1 shown, including the following steps:

[0058] S1: Synthesis of cross-linked acrylate latex: using acrylate with small particle size as seeds, add 0.5 parts of emulsifier, 0.3 parts of cross-linking agent, and 1 part of initiator, heat up to 80°C, and react for 2 hours;

[0059] S2: Agglomeration: Add acrylate monomer under the protection of nitrogen to enlarge the particle size of latex to obtain PBA latex with larger particle size;

[0060] S3: Emulsion graft copolymerization: Add 20 parts of styrene / acrylonitrile mixed monomer and 0.5 part of initiator to acrylate seed latex, then add styrene / acrylonitrile mixture dropwise to PBA latex, with 20 parts / Add dropwise at a speed of h and complete the dropwise addition within 2 hours, add 1.2 parts of antioxidant and 0.5 parts of lubricant, heat up to 80°C, stir at 500 rpm for 6 minutes, react for 2 hours, and obtain a mixture;

[0061] S4: Coagulation: put the mixture into ...

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Abstract

The invention discloses a synthetic method of ASA, and relates to the technical field of high polymer materials. The problem that ASA impact resistance is poor is solved. The preparation method specifically comprises the following steps: cross-linked acrylate latex synthesis: with taking small-particle-size acrylate as a seed, adding 0.5 part of an emulsifier, 0.3 part of a cross-linking agent and1 part of an initiator, heating the components to 80 DEG C, and performing a reaction for 2 hours; agglomeration: adding an acrylate monomer under the protection of nitrogen, and amplifying the particle size of the latex to obtain the PBA latex with larger particle size. According to the invention, the acrylate with small particle size is used as a seed, and the PBA latex with relatively large particle size is synthesized in an agglomeration manner; the modified ASA has a good toughening effect, the impact resistance of ASA is effectively improved, acrylate is used as seed latex to graft styrene-acrylonitrile, the monomer is compatibilized into a rubber core before grafting reaction, internal grafting is facilitated, and the grafting process can be effectively controlled by adding the styrene / acrylonitrile mixed monomer stage by stage.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a synthesis method of ASA. Background technique [0002] The microstructure of acrylonitrile / styrene / acrylate graft copolymer (ASA) is that acrylate rubber (PBA) particles are dispersed in the continuous phase of styrene-acrylonitrile copolymer (SAN) to form a "sea-island" structure. From the perspective of molecular structure, it is a graft copolymer with core-shell structure, with polyacrylate (PBA) rubber phase as the core, styrene and acrylonitrile grafted on the rubber phase as the shell layer, the core has a toughening effect, and the shell The layer acts as a compatibilizer. ASA combines the gloss and processability of polystyrene resin, the mechanical properties and corrosion resistance of acrylonitrile resin, and the excellent impact resistance and weather resistance of acrylate rubber. ASA has the same characteristics as ABS. Similar structure and performance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/00C08L25/12C08F265/04C08F212/10C08F220/44
CPCC08L51/003C08L25/12C08F265/04C08F212/10C08F220/44
Inventor 田岳南田沃田暄曾建波
Owner 江西岳峰集团高分子材料有限公司
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