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

A technology of flame-retardant resin and imide, which is applied in the field of preparation of heat-resistant flame-retardant resin emulsion, can solve the problems of slow reaction speed and discussion of polymerization methods, and achieve stable reaction process, uniform composition and structure, and high heat resistance Effect

Active Publication Date: 2009-08-12
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 preparing halogen substituent maleimide heat-proof flame-proof resin emulsion
  • Method for preparing halogen substituent maleimide heat-proof flame-proof resin emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A. Preparation of monomer mixture

[0047] Add 30 parts of N-tribromophenylmaleimide, 45 parts of styrene, 25 parts of acrylonitrile, 0.35 parts of azobisisobutyronitrile, and 0.1 part of tertiary dodecylmercaptan into the mixing tank at 30 °C, Turn on stirring for mixing to form a homogeneous monomer mixture (a).

[0048] B. Preparation of heat-resistant and flame-retardant resin emulsion

[0049] Add 160 parts of desalted water and 3.5 parts of sodium lauryl sulfate into the reactor at 30°C, start stirring, and add (a) into the reactor for emulsification. After 33 minutes of emulsification, the measured pH value is 9-10, and then the temperature can be raised for polymerization. The temperature of the system was maintained at 75°C to carry out polymerization for 5 hours. Then the temperature of the system was raised to 95°C, and the polymerization reaction was carried out for another 1.0 hour, and the total solid content was measured by sampling. After passing the ...

Embodiment 2

[0055] A. Preparation of monomer mixture

[0056] Add 30 parts of N-tribromophenylmaleimide, 45 parts of styrene, 25 parts of acrylonitrile, 0.35 parts of azobisisobutyronitrile, and 0.1 part of tertiary dodecylmercaptan into the mixing tank at 35 °C, Turn on stirring for mixing to form a homogeneous monomer mixture (a).

[0057] B. Preparation of heat-resistant and flame-retardant resin emulsion

[0058] Add 160 parts of desalted water and 3.2 parts of sodium dodecylbenzenesulfonate into the reactor at 35°C, start stirring and add (a) into the reactor for emulsification. After 42 minutes of emulsification, the measured pH value is 9-10, and then the temperature can be raised for polymerization. The temperature of the system was maintained at 73°C to carry out polymerization for 6 hours. Then the temperature of the system was raised to 95°C, and the polymerization reaction was carried out for another 1.0 hour, and the total solid content was measured by sampling. After pass...

Embodiment 3

[0062] A. Preparation of monomer mixture

[0063] Add 30 parts of N-tribromophenylmaleimide, 45 parts of styrene, 25 parts of acrylonitrile, 0.35 parts of azobisisobutyronitrile, and 0.1 part of tertiary dodecylmercaptan into the mixing tank at 33 °C, Turn on stirring for mixing to form a homogeneous monomer mixture (a).

[0064] B. Preparation of heat-resistant and flame-retardant resin emulsion

[0065] Add 160 parts of desalted water, 2.3 parts of sodium lauryl sulfate, and 1.5 parts of potassium synthetic fatty acid into the reactor at 30°C, start stirring and add (a) into the reactor for emulsification. After 44 minutes of emulsification, the measured pH value is 9-10, and then the temperature can be raised for polymerization. The temperature of the system was maintained at 77°C to carry out polymerization for 4.5 hours. Then the temperature of the system was raised to 95°C, and the polymerization reaction was carried out for another 1.0 hour, and the total solid conte...

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Abstract

A method for preparing a halogen substituent maleimide type heat-resistant flame retardant resin emulsion, which is divided into two parts. The composition and operating conditions are: the halogen substituent maleimide type monomer, aryl vinyl Add monomers, nitrile vinyl monomers, initiators, etc. into the mixing tank, start stirring and mix to form a homogeneous monomer mixture (b); add emulsifier to the reactor, start stirring and add (a) After emulsification, the temperature can be raised to carry out polymerization to form a heat-resistant and flame-retardant resin emulsion (b). The obtained heat-resistant and flame-retardant resin emulsion has the advantages of good appearance, uniform composition and structure, high heat resistance, flame retardancy, and high yield in the polymerization process, and can be widely used in heat-resistant and flame-retardant materials such as ABS, PC, and PBT. modification. Used alone, it can also be used to prepare high heat-resistant and flame-retardant parts of automobiles and household appliances.

Description

technical field [0001] The invention relates to a preparation method of a heat-resistant flame-retardant resin emulsion, in particular to a preparation method of a halogen substituent maleimide heat-resistant 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 copolymerization modification method is mainly composed of two parts technology, one part is th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F212/10C08F222/40C08F2/24C08F4/04C08F4/32C08J3/03
Inventor 荔栓红王永峰桂强邵卫于奎郑聚成任美红李晶
Owner PETROCHINA CO LTD