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Preparation method of acrylonitrile-styrene-acrylate tough resin based on block copolymer

A block copolymer, polybutyl acrylate technology, applied in the field of ASA resin materials, can solve the problems of harsh reaction conditions, small range of monomers, and inability to synthesize block copolymers, etc., and achieve fast polymerization reaction and excellent mechanical properties , Molecular weight growth controllable effect

Active Publication Date: 2017-10-31
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current methods for synthesizing block copolymers in industry are basically ionic polymerization. The reaction conditions are harsh and the range of applicable monomers is small, so it is impossible to synthesize block copolymers with strong polar groups (such as cyano groups).

Method used

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  • Preparation method of acrylonitrile-styrene-acrylate tough resin based on block copolymer
  • Preparation method of acrylonitrile-styrene-acrylate tough resin based on block copolymer
  • Preparation method of acrylonitrile-styrene-acrylate tough resin based on block copolymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Block copolymer toughening modifier: R-AA n1 -b-St n2 -b-(St-co-AN) n3 -b-nBA n4 -X, where (St-co-AN) n3 -b-nBA n4 The designed molecular structure of the block copolymer is 30K-120K, and the monomer mass ratio of St to AN is 3:1:

[0056] (1) 1.7 parts by weight of amphiphilic macromolecular reversible addition fragmentation chain transfer reagent (1) was stirred and dissolved in 80 parts by weight of water to form an aqueous phase, and then mixed with oil composed of 15 parts by weight St and 5 parts by weight AN Pour the phases together into the reactor and stir to mix. Raise the reaction temperature to 70°C, keep stirring, pass nitrogen to remove oxygen for more than 5 minutes, add 0.04 parts by weight of water-soluble initiator potassium persulfate, and polymerize for 1 hour to obtain R-AA n1 -b-St n2 -b-(St-co-AN) n3 -X block copolymer, the block copolymer is stably dispersed in water in the form of particles to form latex.

[0057] (2) After the first st...

Embodiment 2

[0062] Block copolymer toughening modifier: R-AA n1 -b-St n2 -b-(St-co-AN) n3 -b-nBA n4 -b-(St-co-AN) n5 -X, where (St-co-AN) n3 -b-nBA n4 -b-(St-co-AN) n5 The designed molecular structure of the block copolymer is 30K-120K-30K, and the monomer mass ratio of St to AN is 3:1:

[0063] (1) 1.7 parts by weight of amphiphilic macromolecular reversible addition fragmentation chain transfer reagent (1) was stirred and dissolved in 80 parts by weight of water to form an aqueous phase, and then mixed with oil composed of 15 parts by weight St and 5 parts by weight AN Pour the phases together into the reactor and stir to mix. Raise the reaction temperature to 70°C, keep stirring, pass nitrogen to remove oxygen for more than 5 minutes, add 0.04 parts by weight of water-soluble initiator ammonium persulfate, and polymerize for 1 hour to obtain R-AA n1 -b-St n2 -b-(St-co-AN) n3 -X block copolymer, the block copolymer is stably dispersed in water in the form of particles to form ...

Embodiment 3

[0072] Block copolymer toughening modifier: R-AA n1 -b-St n2 -b-(St-co-AN) n3 -b-nBA n4 -b-(St-co-AN) n5 -X, where (St-co-AN) n3 -b-nBA n4 -b-(St-co-AN) n5 The designed molecular structure of the block copolymer is 30K-120K-30K, and the monomer mass ratio of St to AN is 3:1:

[0073] (1) 1.7 parts by weight of amphiphilic macromolecular reversible addition fragmentation chain transfer reagent (1) was stirred and dissolved in 80 parts by weight of water to form an aqueous phase, and then mixed with oil composed of 15 parts by weight St and 5 parts by weight AN Pour the phases together into the reactor and stir to mix. Raise the reaction temperature to 70°C, keep stirring, pass nitrogen to remove oxygen for more than 5 minutes, add 0.04 parts by weight of water-soluble initiator 4,4'-azobis(4-cyanovaleric acid), and polymerize for 1 hour, get R-AA n1 -b-St n2 -b-(St-co-AN) n3 -X block copolymer, the block copolymer is stably dispersed in water in the form of particles...

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Abstract

The invention discloses a preparing method of acrylonitrile-styrene-acrylic ester (ASA) tough resin based on a segmented copolymer. An emulsion polymerization system is used, a reversible addition breakage chain transferring free radical polymerization technology is used, a poly(styrene-acrylonitrile) / poly butyl acrylate segmented copolymer toughening modification agent is synthesized, and by blending and injection with a poly(styrene-acrylonitrile) base body, the ASA tough resin based on segmented copolymer toughening modification is obtained. During a preparing process, environment is protected, energy is saved, amphiphilic macromolecules are used for reversible addition of a breakage chain transferring reagent, the double functions of the chain transferring reagent and an emulsifying agent are achieved, good control over monomer polymerization is achieved, using of traditional emulsifying agents is avoided, polymerization speed is high, the polymer molecular weight range is wide, the monomer combining range is wide, the product mechanical property is good, and high application prospect is achieved.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a preparation method of acrylonitrile-styrene-acrylate tough resin based on block copolymers. ASA with strong rigidity and high toughness can be obtained by adjusting the molecular chain structure of the polymer Resin material. Background technique [0002] Acrylonitrile-styrene-acrylate (ASA) resin is developed based on acrylonitrile-butadiene-styrene (ABS) resin. Compared with ABS resin, ASA resin replaces polybutadiene with poly Acrylate can effectively improve the UV stability, thermal stability and chemical resistance of materials, and has been widely used as an important plastic material. [0003] The traditional ASA resin preparation method is mainly realized by introducing micron-sized rubber dispersion particles into the styrene-acrylonitrile (SAN) resin matrix, and the phase morphology of the material presents a "sea-island structure". Rubber par...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L25/12C08L53/00C08F293/00C08F2/38
Inventor 黄杰高翔罗英武
Owner ZHEJIANG UNIV
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