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Temperature-sensitive core-shell acrylate functional microspheres and preparation method thereof

A core-shell acrylate and acrylate technology is applied in the field of preparation of temperature-sensitive core-shell acrylate functional microspheres, which can solve the problem of not considering the temperature sensitivity of polymer microspheres, and achieve good room temperature storage stability, Improve accuracy and repeatability, and facilitate the effect of large-scale production

Inactive Publication Date: 2013-01-02
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN1590424A (Zhou Wenle and Zhao Shen, etc., 2003) publicly reported a method for the preparation of acrylate core-shell polymers. This method has a simple process and significantly improves the compatibility of core-shell components, but does not consider Temperature Sensitivity of Polymer Microspheres Caused by Differences in Glass Transition Temperatures of Core-Shell Components

Method used

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  • Temperature-sensitive core-shell acrylate functional microspheres and preparation method thereof
  • Temperature-sensitive core-shell acrylate functional microspheres and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Weigh 0.8 grams of ammonium persulfate and dissolve it in 20 grams of deionized water evenly, and set aside; mix 0.8 grams of compound emulsifier with water evenly, put it in a 500ml four-necked bottle and stir at high speed, set aside, the compound emulsifier is prepared by OP- 10. OS and SLS are composed at a mass ratio of 6:3:1~1:1:1; weigh 20 grams of methyl methacrylate and 80 grams of n-butyl methacrylate and mix evenly, and add the above-mentioned In a 500ml four-necked bottle, perform pre-emulsification; after the monomer mixture is added dropwise, add 0.05 g of EGDMA and the ammonium persulfate solution prepared in step 1, and continue stirring for 1 hour to obtain a stable nuclear pre-emulsion, which is set aside.

[0042] (2) Weigh 0.8 g of ammonium persulfate and dissolve it in 20 g of deionized water evenly, and set aside; mix 0.8 g of compound emulsifier and water evenly, place it in a 500ml four-necked bottle and stir at high speed, set aside; weigh 90...

Embodiment 2

[0048] The temperature-sensitive core-shell acrylate polymer microspheres were prepared with the same formula and process as in Example 1, but potassium persulfate was weighed in Step 1 and Step 2 to prepare the initiator solution.

Embodiment 3

[0050] The temperature-sensitive core-shell acrylate polymer microspheres were prepared with the same formula and process as in Example 1, but 2 g of ammonium persulfate was weighed in Step 1 and Step 2 to prepare the initiator solution.

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Abstract

The invention discloses temperature-sensitive core-shell acrylate functional microspheres and a preparation method thereof. The preparation method takes methyl methacrylate and butyl methacrylate as main monomers, takes acrylate containing difunctional groups or trifunctional groups and derivatives thereof as cross-linking agents, takes a compound emulsifying agent as an emulsion system, and adopts a seed emulsion polymerization method for preparing a core-shell emulsion. The preparation method comprises the following concrete steps of: uniformly mixing n-butyl methacrylate (n-BMA) and methylmethacrylate (MMA), reacting with the emulsifying agent solution for pre-emulsification to prepare a core pre-emulsion and a shell pre-emulsion, adding seeds, an initiating agent and the like under the condition of 65 DEG C, heating; after the temperature rises to 85 DEG C, slowly dripping the core pre-emulsion for preparing cores within 2 hours, insulating for 10 minutes; and slowly dripping theshell pre-emulsion into the reaction system within 4 hours, insulating for 1 hour, then cooling and discharging. The preparation process is simple, and temperature-sensitive core-shell polymer microspheres with controllable particle size, adjustable core-shell thickness ratio and narrow particle size distribution can be prepared.

Description

technical field [0001] The invention belongs to the technical field of functional polymer materials, and specifically relates to a method for preparing temperature-sensitive core-shell acrylate functional microspheres. Background technique [0002] Thermosensitive core-shell polymer microspheres are a kind of thermosensitive nano-heterogeneous microspheres. This type of microspheres maintains a complete core-shell structure multiphase state when the temperature is within a certain range, but when the temperature rises to a certain temperature, the multiphase structure of the microspheres is destroyed, and the polymer chains are entangled with each other to form a homogeneous state. phase structured polymers. This temperature is around the glass transition temperature of the shell polymer, which is the critical temperature for the existence of core-shell microspheres. Polymer microspheres with this property can be used to prepare specialty materials that need to be protect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/14C08F220/18C08F222/14C08F220/28C08F2/24
Inventor 王春鹏储富祥陈鹏鹏程增会
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY