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Polyacrylate elastomer with core-shell structure and its preparation method

A technology of polyacrylate and core-shell structure, which is applied in the field of core-shell structure polyacrylate elastomer and its preparation, can solve the problem of not being able to contribute to the toughness of polymer materials, limiting the application range of polymer materials, and not possessing the toughness of elastomers, etc. problem, achieve the effect of maintaining durability, improving mechanical properties and reducing migration

Inactive Publication Date: 2013-04-10
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the high-molecular-weight light stabilizers obtained by these research results can effectively improve the volatilization and migration of light stabilizers to a certain extent, so that the polymer has an inherent "permanent" light stabilization effect, but due to its own It does not have the excellent toughness of elastomers, and cannot contribute to the toughness of polymer materials after being added, so the toughness of polymer materials after aging is poor, which limits the application range of polymer materials

Method used

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  • Polyacrylate elastomer with core-shell structure and its preparation method
  • Polyacrylate elastomer with core-shell structure and its preparation method
  • Polyacrylate elastomer with core-shell structure and its preparation method

Examples

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Effect test

Embodiment 1

[0040] 40 parts of butyl acrylate, 10 parts of methyl methacrylate, 10 parts of 2-hydroxyl-4-(-3-methacrylate-2-hydroxypropoxyl) benzophenone, and the total mass of compound emulsifier 50% of the total mass of deionized water and 50% of the total mass of deionized water, fully stirred and mixed to obtain a pre-emulsion of the core layer monomer; 10 parts of methyl methacrylate, 10 parts of butyl acrylate, 2-hydroxyl-4-(-3 - 10 parts of methacrylate-2-hydroxypropoxy) benzophenone, 50% of the total mass of the composite emulsifier and 50% of the total mass of deionized water, fully stirred and mixed to prepare the shell monomer pre-emulsification 30% of the total mass of the obtained nuclear layer monomer pre-emulsion, 50% of the total mass of the pH regulator and 15% of the total mass of the initiator, stirred and mixed and heated up to 70 ° C, until the blue phase appeared in the emulsion, continue to stir and keep warm The core seed microemulsion was prepared in 30 minutes; t...

Embodiment 2

[0043] 40 parts of butyl acrylate, 30 parts of ethyl acrylate, 50% of the total mass of the composite emulsifier and 50% of the total mass of deionized water were fully stirred and mixed to obtain a pre-emulsion of the core layer monomer; the methacrylate EMA10 Parts, 20 parts of 2-hydroxyl-4-(-3-methacrylate group-2-hydroxypropoxy) benzophenone, 50% of the total mass of the composite emulsifier and 50% of the total mass of deionized water, Thoroughly stir and mix to obtain the shell layer monomer pre-emulsion; 50% of the total mass of the obtained core layer monomer pre-emulsion, 50% of the total mass of the pH regulator and 30% of the total mass of the initiator, stirring and mixing are heated up to 70 ℃, until the blue phase appears in the emulsion, continue to stir and insulate for 30 minutes to obtain the nuclear seed microemulsion; first the prepared nuclear seed microemulsion is warmed up to 75 ℃, and then respectively add 50% of the total mass of the nuclear layer monom...

Embodiment 3

[0046] 20 parts of ethyl acrylate, 25 parts of diethylhexyl acrylate, 5 parts of 2-hydroxy-4-(-3-methacrylate-2-hydroxypropoxy) benzophenone, and a total of compound emulsifiers 60% of the mass and 60% of the total mass of deionized water, fully stirred and mixed to obtain a pre-emulsion of the core layer monomer; 20 parts of ethyl methacrylate, 20 parts of isobutyl methacrylate, 2-hydroxyl-4 -10 parts of (-3-methacrylate-2-hydroxypropoxy) benzophenone, 40% of the total mass of the composite emulsifier and 40% of the total mass of deionized water, fully stirred and mixed to obtain a shell Monomer pre-emulsion: 30% of the total mass of the obtained nuclear layer monomer pre-emulsion, 60% of the total mass of the pH regulator and 20% of the total mass of the initiator, stirred and mixed and heated to 75 ° C, until the blue phase appeared in the emulsion , continue to stir and insulate for 40 minutes to make the nuclear seed microemulsion; first the nuclear seed microemulsion tha...

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Abstract

The invention discloses polyacrylate elastomer with a core-shell structure and its preparation method. The polyacrylate elastomer with the core-shell structure is obtained by using acrylic acid ester, metacrylic acid ester and a reactive type ultraviolet ray absorber according to a certain ratio through a method of the polymerization of seed emulsion in a semicontinuous feeding mode, wherein the color of the appearance is white, light yellow or yellow, and the weight average molecular weight is 2 to 10xe<5>g / mol. Polymer latex particles appear as a microsphere state before the demulsificationof the elastomer, a three-layer structure of the latex particles microsphere can be observed after dyeing by phosphor-tungstic acid, the three layers comprise a core layer, a transition layer and a shell layer sequentially from the inside to the outside. According to the invention, polyacrylate elastomer with the core-shell structure reacts the polymer material by a melt blending process so that the ultraviolet light stability of the high-molecular material can be enhanced and the polymer material can be effectively is toughened, and the emulsion polymerisation method has the advantages of environmental protection without pollution, mature technology and easy realization of industrialization.

Description

technical field [0001] The invention belongs to the technical field of polyacrylate elastomers and their preparation, and in particular relates to a polyacrylate elastomer with a core-shell structure used as an ultraviolet light absorber and a preparation method thereof. Background technique [0002] As we all know, polymer materials are prone to aging and degradation under the action of external ultraviolet light, oxygen, heat and other environmental factors, resulting in deterioration of appearance and physical and mechanical properties, usually manifested as discoloration, silver streaks, cracks, and decline in mechanical properties. In particular, the impact performance and elongation performance of the material drop drastically. In order to improve the UV stability of polymer materials and prolong the service life of polymer materials, people often use the method of adding various additives. [0003] At present, commonly added additives include light stabilizers such a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/18C08F220/14C08F220/30C08F2/26C08F2/30
Inventor 任显诚吴桂波
Owner SICHUAN UNIV
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