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Method for preparing functional acrylate copolymer emulsion for toughening nylon 6

A technology of acrylates and acrylates, which is applied in the field of preparation of functionalized acrylate copolymer emulsions for nylon 6 toughening, can solve the problems of poor interface bonding between phases, difficulty in controlling the particle size and distribution of dispersed phases, etc. To achieve the effect of improving the notched impact strength

Inactive Publication Date: 2010-10-20
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is: to provide a structure and Particle size controllable, preparation method for multilayer core-shell structure functionalized acrylate copolymer emulsion containing methacrylic acid compatibilizer in outer shell layer of toughened nylon 6

Method used

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  • Method for preparing functional acrylate copolymer emulsion for toughening nylon 6
  • Method for preparing functional acrylate copolymer emulsion for toughening nylon 6
  • Method for preparing functional acrylate copolymer emulsion for toughening nylon 6

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] a. Pre-emulsification of nuclear layer monomer

[0044] First, add 0.3g of anionic emulsifier sodium dodecyl diphenyl ether sulfonate and 140g of deionized water into a 500ml four-neck flask, and mix and stir for 20min; then add 10g of butyl acrylate into the reaction flask, and mix and stir for 10min , that is, the pre-emulsion of the core layer monomer is obtained and set aside.

[0045] b. Pre-emulsification of shell monomer

[0046] Take three 300ml beakers, add 1.88g of anionic emulsifier sodium dodecyl diphenyl ether sulfonate, 150g of butyl acrylate, 0.75g of allyl methacrylate and 0.057g of tert-dodecyl mercaptan into the beakers in sequence 1, and then place it on an electromagnetic stirrer and mix and stir for at least 20 minutes to obtain the first monomer pre-emulsion of the shell layer; add 0.1g of anionic emulsifier sodium dodecyl diphenyl ether sulfonate and 8g of methyl methacrylate In the beaker 2, place it on an electromagnetic stirrer and mix and st...

Embodiment 2～9

[0058] The specific steps are the same as in Example 1, but the changes in the quality of the seed stage emulsifier and crosslinking agent used in Examples 2 to 9 are specifically shown in Table 1.

[0059] Formulations of the seed stage emulsifier and crosslinking agent in the preparation examples 2-9 of the functionalized acrylate emulsion of the multilayer core-shell structure in Table 1

[0060]

[0061] The parameters of the functionalized acrylate polymer emulsion in the above examples are listed in Table 2, and the mechanical properties of these functionalized acrylate polymers modified PA6 are listed in Table 3.

[0062] Table 2 The parameters of the functionalized acrylate emulsion of multilayer core-shell structure

[0063]

[0064] Table 3 Mechanical properties of functionalized acrylate polymer and nylon 6 blends with multilayer core-shell structure

[0065]

[0066] As can be seen from Table 2, when using this invention to prepare the functionalized acry...

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Abstract

The invention discloses a method for preparing functional acrylate copolymer emulsion for toughening nylon 6, which comprises the following steps: a. preemulsifying a nuclear layer monomer; b. preemulsifying a shell monomer; c. preparing acrylate emulsion: respectively adding three layers of monomer preemulsion in a reactor containing nuclear layer monomer preemulsion in step a, adding three initiator solutions with different concentrations to obtain multi-layer nuclear shell structural functional acrylate copolymer emulsion, and finally freezing, washing, filtering, drying and the like to obtain functional acrylate copolymer powder with a multi-layer nuclear shell structure. The conversion rate of the functional acrylate copolymer emulsion monomer prepared by the invention can reach over 95%, the content of the aggregate is below 1.8%, and final latex particle size distribution is less than 0.5, thus the visible monomer use rate is high, the reaction system is stable, and the latex is distributed in monodispersion.

Description

technical field [0001] The technical solution of the present invention relates to a multilayer core-shell structure functionalized acrylate copolymer emulsion containing methacrylic acid compatibilizer in the shell outer layer of toughened nylon 6, specifically functionalized acrylate for nylon 6 toughening Preparation method of copolymer emulsion. Background technique [0002] Polyamide 6 (Nylon 66, commonly known as Nylon 6) has notched impact sensitivity and brittleness at low temperature and dry state, making it less resistant to crack growth, which largely limits its application. For some occasions used outdoors, as well as parts requiring impact resistance, such as railway track end insulation boards, skates, sports equipment, etc., toughening and modification must be done to improve the impact resistance of nylon 6. For the toughening of nylon 6, most of the current efforts are focused on elastomer-toughened nylon 6, and elastomer-toughened nylon 6, like other polyme...

Claims

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Application Information

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IPC IPC(8): C08F220/18C08F220/14C08F220/06C08F2/26C08L77/02C08L33/08
Inventor 瞿雄伟赵海燕张广林姚艳梅张颖
Owner HEBEI UNIV OF TECH
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