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Method for synthesizing halogen substituent maleimide heat-proof flame-proof resin emulsion

A technology of flame retardant resin and synthesis method, which is applied in the field of polymer emulsion preparation, can solve the problems of polymerization method discussion and slow reaction speed, achieve the effect of shortening the production cycle and making up for the low utilization rate of equipment

Active Publication Date: 2008-03-12
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 halogen substituent maleimide heat-proof flame-proof resin emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A. Preparation of Primary Emulsion

[0054] 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).

[0055] B. Preparation of monomer mixture

[0056] Add 30 parts of N-tribromophenylmaleimide, 44 parts of styrene, 25 parts of acrylonitrile, and 0.1 part of mercaptan into the mixing tank at 30°C, start stirring and mix to form a homogeneous monomer mixture (b) .

[0057] C. Preparation of Monomer Emulsion

[0058] 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 emulsifi...

Embodiment 2

[0064] A. Preparation of Primary Emulsion

[0065] 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 reactor equipped with stirring at 28°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).

[0066] B. Preparation of monomer mixture

[0067] Add 30 parts of N-tribromophenylmaleimide, 44 parts of styrene, 25 parts of acrylonitrile, and 0.15 parts of mercaptan into the mixing tank at 28°C, start stirring and mix to form a homogeneous monomer mixture (b) .

[0068] C. Preparation of Monomer Emulsion

[0069] Add 130 parts of desalinated 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 28°C, sta...

Embodiment 3

[0075] A. Preparation of Primary Emulsion

[0076] 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 35°C, and start stirring for emulsification. After 30 minutes of emulsification, the temperature of the aqueous phase in the reaction was raised to 78° C. within 30 minutes, and kept at a constant temperature for 10 minutes to form the primary emulsion (a).

[0077] B. Preparation of monomer mixture

[0078] Add 30 parts of N-tribromocyclohexylmaleimide, 44 parts of styrene, 23 parts of acrylonitrile, and 0.12 parts of mercaptan into the mixing tank at 35°C, start stirring and mix to form a homogeneous monomer mixture (b) .

[0079] C. Preparation of Monomer Emulsion

[0080] 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 a...

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Abstract

The present invention relates to the synthesis method of a halogen substitute maleimide Imide-like anti-heat flame-retardant resin emulsion. The synthesis process can be divided into four steps. The components and the operating condition of the present invention are: emulsifier, some aryl ethylene monomer, cyano-ethylene monomer, initiator and other agents are added into a reactor for emulsification so as to generate the primary emulsion (a); the halogen substitute maleimide monomer, the remained aryl ethylene monomer and cyano-ethylene monomer are added into a mixing trough to form homogeneous monomer mixture (b); desalination of water, initiator, emulsifier, and (b) are added into a emulsifier for emulsification so as to generate monomer emulsion (c); when (a) is formed,(c) is added into the reactor to mix with (a) for polymerization reaction. The anti-heat flame-retardant resin emulsion obtained by the present invention has the advantages of good appearance, even composition and structure, high heat-resistant effectiveness, high fire-retardant and polymerization efficiency and so on. The anti-heat flame-retardant resin emulsion can be widely used in the improvement of anti-heat and flame-retardant effectiveness of ABS, PC, PBT and other materials. When used alone, the anti-heat flame-retardant resin emulsion can also be used in the anti-heat and flame-retardant components of automobiles and domestic appliances.

Description

technical field [0001] The invention relates to a method for preparing a polymer emulsion, in particular to a method for synthesizing a halogen substituent maleimide heat-resistant and flame-retardant resin emulsion. Background technique [0002] The free radical copolymer of maleimide monomers with halogen substituents, because of the planar five-membered ring structure in the molecular chain, can effectively inhibit the rotation of the chain, so it has high structural rigidity and thermal stability. The molecular chain contains halogen, and has good flame retardancy on the basis of heat resistance, so it has attracted widespread attention. [0003] The preparation of heat-resistant and flame-retardant 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 par...

Claims

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Application Information

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IPC IPC(8): C08F222/40C08F212/10C08F2/24C08F4/40C08J3/03C07D207/448
Inventor 荔栓红邵卫桂强梁滔任美红赵继忠张守汉李晶
Owner PETROCHINA CO LTD
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