A kind of in-situ composite core-shell structure toughening agent and preparation method thereof

A core-shell structure, in-situ composite technology, used in the field of plastic modification, can solve the problems of poor powder fluidity, easy agglomeration, and unfavorable production, and achieve good toughening effect, increase apparent density, increase elasticity and absorption. energy effect

Inactive Publication Date: 2017-01-25
GUANGZHOU XINBANG CHEM & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the toughener particles prepared by these two methods have a low apparent density, generally about 0.2-0.3g / cm 3 , The lower apparent density will lead to poor fluidity and easy agglomeration of the powder, which is not conducive to the storage, packaging and transportation of the product, and is also not conducive to the production of the next process
[0003] Many scholars at home and abroad have prepared a variety of particles with inorganic matter as the core and organic matter as the shell, and tried to toughen PVC, but the toughening effect is not ideal

Method used

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preparation example Construction

[0028] The present invention also provides a preparation method of an in-situ composite core-shell structure toughening agent, comprising:

[0029] Add water, emulsifier and initiator into the reaction kettle, raise the temperature to 40-80°C, then add soft monomer and multi-active monomer into the reaction kettle, preferably react for 2 hours, then add hard monomer and The mixture of dispersed inorganic substances is reacted, preferably for 2 hours. After the reaction is completed, it is filtered, coagulated, and dried to obtain an in-situ composite core-shell toughening agent.

[0030] According to the present invention, the emulsifier is preferably sodium lauryl sulfate; the initiator is preferably potassium persulfate.

Embodiment 1

[0033] Add 400 parts of water to a 1000mL reactor equipped with a stirrer and a condenser, protect it under nitrogen, raise the temperature to 60°C, add 1 part of sodium lauryl sulfate, 0.5 parts of potassium persulfate, 180 parts of butyl acrylate and 1.5 1 part of triethylene glycol triacrylate, polymerized for 2 hours, added 0.5 parts of potassium persulfate, ultrasonically dispersed 1.5 parts of titanium dioxide powder and 120 parts of methyl methacrylate blend, dropped into the reactor, and ended the reaction after 2 hours . After filtration, coagulation and drying, the in-situ composite core-shell structure toughening agent powder is obtained.

Embodiment 2

[0035] Add 400 parts of water to a 1000mL reactor equipped with a stirrer and a condenser, protect it under nitrogen, raise the temperature to 60°C, add 1 part of sodium lauryl sulfate, 0.5 parts of potassium persulfate, 180 parts of ethyl acrylate and 6 Parts of triallyl isocyanurate, polymerized for 2 hours, added 0.5 parts of potassium persulfate, ultrasonically dispersed 3 parts of silicon dioxide powder and 120 parts of styrene blend, and added dropwise to the reaction kettle, after 2 hours End the reaction. After filtration, coagulation and drying, the in-situ composite core-shell structure toughening agent powder is obtained.

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Abstract

The invention provides an in-situ compound type core-shell toughener and a preparation method thereof, and belongs to the technical field of plastic modifying. The core-shell toughener comprises the following components in parts by weight: 180 to 270 parts of soft monomer, 30 to 120 parts of hard monomer, 1.5 to 6 parts of multi-activity monomer, and 1.5 to 3 parts of inorganic matter; the soft monomer is acrylic monomer. The invention also provides the preparation method of the in-situ compound type core-shell toughener. The in-situ compound type core-shell toughener has the advantages that the impact modifying property is good, and the apparent density is higher; after proofing by experiment results, the maximum apparent density value is 0.45g / cm<3>.

Description

technical field [0001] The invention belongs to the technical field of plastic modification, and specifically provides an in-situ composite core-shell structure toughening agent and a preparation method thereof. Background technique [0002] Toughener for core-shell plastics, can be used as a broad-spectrum plastic toughener, widely used in polyvinyl chloride (PVC), polycarbonate (PC), polybutylene terephthalate (PBT) and polyvinyl chloride (PBT) In the toughening modification of resins such as lactic acid (PLA), the toughening effect is excellent. At present, most of such toughening agents are prepared by emulsion polymerization, and then the obtained emulsion is coagulated with saline solution or dilute acid solution, washed and de-dried, and it is also prepared in one step by spray drying. However, the toughener particles prepared by these two methods have a low apparent density, generally about 0.2-0.3g / cm 3 , The lower apparent density will lead to poor fluidity and e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/18C08F220/14C08F212/08C08F218/08C08F222/14C08F226/06C08F2/26C08F2/44C08K3/22C08K3/36C08K3/26
Inventor 吴广峰张海龙张会轩
Owner GUANGZHOU XINBANG CHEM & TECH CO LTD
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