Method for synthesizing latex of heat-resistant resin in maleimide class

A technology of maleimide and heat-resistant resin is applied in the field of preparation of polymer emulsion, which can solve the problems of discussion of polymerization method and slow reaction speed, and achieve the effects of shortening production cycle, being extremely easy to control, and solving instability.

Inactive Publication Date: 2007-05-09
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] US4757109 describes a process for synthesizing styrene, acrylonitrile, and maleimide terpolymers by emulsion polymerization, using an anionic emulsifier with good emulsifying ability in the range of pH 3 to 9, and the initiator adopts Redox system or potassium persulfate initiator, the patent pointed out that when potassium persulfate initiator is used, the reaction speed is slow, and the polymerization process is relatively simple, and there is no special discussion on the polymerization method

Method used

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  • Method for synthesizing latex of heat-resistant resin in maleimide class

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A. Preparation of Primary Emulsion

[0053] Add 30 parts of desalted water, 0.3 parts of sodium lauryl sulfate, 0.7 parts of styrene, 0.3 parts of acrylonitrile, and 0.1 parts of potassium persulfate into a stirred reactor at 30°C, and start stirring for emulsification. After 30 minutes of emulsification, the temperature of the water phase in the reactor was raised to 78° C. within 30 minutes, and kept at a constant temperature for 10 minutes to form the primary emulsion (a).

[0054] B. Preparation of monomer mixture

[0055] Add 30 parts of N-phenylmaleimide, 44 parts of styrene, 25 parts of acrylonitrile, and 0.1 part of tertiary dodecylmercaptan into the mixing tank at 30°C, start stirring and mix to form a homogeneous monomer mixture ( b).

[0056] C. Preparation of Monomer Emulsion

[0057] Add 130 parts of desalted water, 0.35 parts of potassium persulfate, and 2.7 parts of sodium lauryl sulfate into the emulsifier at 30°C, start stirring and add (b) into the ...

Embodiment 2

[0065] A. Preparation of Primary Emulsion

[0066] Add 30 parts of desalted water, 0.3 parts of sodium lauryl sulfate, 1.0 part of acrylonitrile, and 0.15 parts of potassium persulfate into a stirred reactor at 30°C, and start stirring for emulsification. After 30 minutes of emulsification, the temperature of the water phase in the reactor was raised to 78° C. within 30 minutes, and kept at a constant temperature for 10 minutes to form the primary emulsion (a).

[0067] B. Preparation of monomer mixture

[0068] Add 30 parts of N-phenylmaleimide, 44 parts of styrene, 25 parts of acrylonitrile, and 0.15 parts of tertiary dodecylmercaptan to the mixing tank at 30°C, start stirring and mix to form a homogeneous monomer mixture ( b).

[0069] C. Preparation of Monomer Emulsion

[0070] Add 130 parts of desalted water, 0.35 parts of potassium persulfate, 1.7 parts of sodium lauryl sulfate and 1.0 part of synthetic fatty acid potassium into the emulsifier at 30°C, start stirring ...

Embodiment 3

[0076] A. Preparation of Primary Emulsion

[0077]Add 30 parts of desalted water, 0.3 parts of sodium lauryl sulfate, 0.7 parts of styrene, 2.3 parts of acrylonitrile, and 0.1 parts of potassium persulfate into a stirred reactor at 30°C, and start stirring for emulsification. After 30 minutes of emulsification, the temperature of the water phase in the reactor was raised to 78° C. within 30 minutes, and kept at a constant temperature for 10 minutes to form the primary emulsion (a).

[0078] B. Preparation of monomer mixture

[0079] Add 30 parts of N-cyclohexylmaleimide, 44 parts of styrene, 23 parts of acrylonitrile, and 0.12 parts of tertiary dodecylmercaptan to the mixing tank at 30°C, start stirring and mix to form a homogeneous monomer mixture ( b).

[0080] C. Preparation of Monomer Emulsion

[0081] Add 130 parts of desalted water, 0.35 parts of potassium persulfate, 1.7 parts of sodium lauryl sulfate and 1.0 part of synthetic fatty acid potassium into the emulsifier...

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Abstract

This invention discloses a method for synthesizing heat-resistant maleimide resin emulsion. The method comprises four steps: (1) adding emulsifier, part of aryl ethylene monomer, nitrile ethylene monomer and initiator into a reactor equipped with stirrer, and emulsifying to obtain primary emulsion A; (2) adding maleimide monomer, the rest aryl ethylene monomer and nitrile ethylene monomer into a mixing tank, and mixing to obtain homogeneous monomer solution B; (3) adding desalting water, initiator, emulsifier and B into an emulsification tank, and emulsifying to obtain monomer emulsion C; (4) adding C into the reactor, and polymerizing with A.. The obtained heat-resistant maleimide resin emulsion has good appearance, uniform composition and structure, good heat resistance, and high yield. The obtained heat-resistant maleimide resin emulsion can be used for modifying such materials as ABS, PC and PBT, and can also be used lonely for producing heat-resistant components of automobiles and home appliances.

Description

technical field [0001] The invention relates to a method for preparing a polymer emulsion, in particular to a method for synthesizing a maleimide heat-resistant resin emulsion. Background technique [0002] Free radical copolymers of maleimide monomers have attracted extensive attention because of their molecular chains containing a planar five-membered ring structure, which can effectively inhibit chain rotation and thus have high structural rigidity and thermal stability. Among them, there are many studies on the copolymers of maleimide monomers and aryl vinyl monomers. [0003] The preparation of ultra-high heat-resistant ABS resin includes alloy method and copolymerization modification method, among which copolymerization modification method is a better technical route. The alloy method mainly refers to the PC / ABS alloy. The copolymerization modification method is mainly composed of two parts of technology, one part is the maleimide monomer of maleimide (IMID) and aryl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F222/40C08F212/08C08F2/24
Inventor 荔栓红邵卫王乐雷岚王永峰
Owner PETROCHINA CO LTD
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