Method for preparing acrylic ester functionalized copolymer for plasticizing nylon 6

A technology of acrylates and acrylates, which is applied in the field of preparation of acrylate functionalized copolymers 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., and achieve Effect of Improving Notched Impact Strength

Inactive Publication Date: 2010-10-27
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: aiming at the shortcomings of current modified PA6 multiphase blending system, such as poor interphase interface bonding, difficulty in controlling the particle size of the dispersed phase and the distri

Method used

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  • Method for preparing acrylic ester functionalized copolymer for plasticizing nylon 6
  • Method for preparing acrylic ester functionalized copolymer for plasticizing nylon 6
  • Method for preparing acrylic ester functionalized copolymer for plasticizing nylon 6

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0044] First, add 0.1g of anionic emulsifier sodium dodecyl diphenyl ether sulfonate and 140g of deionized water into a 500ml four-necked 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 ...

Embodiment 2～9

[0058] The specific steps are the same as in Example 1, but the quality of the crosslinking agent and the shell-layer functional monomer acrylic acid used in Examples 2-9 are changed, as shown in Table 1 for details.

[0059] Table 1 The amount of crosslinking agent and shell functional monomer in the preparation examples 2-9 of acrylate functionalized copolymer emulsion

[0060]

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

[0062] Table 2 Parameters of acrylate functionalized copolymer emulsion

[0063]

[0064] Table 3 Mechanical properties of acrylate functionalized copolymers and nylon 6 blends

[0065]

[0066] As can be seen from Table 2, when using this invention to prepare acrylate functionalized copolymers, the conversion rate of monomers all reaches more than 93%, the content...

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Abstract

The invention discloses a method for preparing an acrylic ester functionalized copolymer for plasticizing nylon 6. The method comprises the following steps of: a, pre-emulsifying a nuclear layer monomer; b, pre-emulsifying a shell layer monomer; and c, preparing acrylic ester emulsion, namely, adding three layers of monomer pre-emulsion into a reactor filled with nuclear layer monomer pre-emulsion of the step a respectively, adding initiator solution of which the concentrations are different into the reactor to obtain acrylic ester functionalized copolymer emulsion and refrigerating, washing, filtering and drying the copolymer emulsion to obtain acrylic ester functionalized copolymer powder. When the method is used for preparing the acrylic ester functionalized copolymer for plasticizing the nylon 6, the conversion rates of the monomers reach over 93 percent, aggregate content is less than 1.5 percent and final latex particle size is less than 0.7. Therefore, the method has the advantages of high monomer utilization ratio, stable reaction system and mono-dispersed distribution of the latex particle size.

Description

technical field [0001] The technical solution of the present invention relates to a multi-layer core-shell structure acrylate functionalized copolymer containing an acrylic acid compatibilizer in the shell outer layer of toughened nylon 6, specifically an acrylate functionalized copolymer for toughening nylon 6 method of preparation. Background technique [0002] Polyamide 6 (PA6, commonly known as Nylon 6) is sensitive to notched impact and brittle at low temperature and dry state, making it less resistant to crack propagation, which limits its application to a large extent. 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, at present, most of them are concentrated on elastomer-toughened nylon, and elastomer-toughened nylon, like other polymer blends, bel...

Claims

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Application Information

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