Method for preparing maleimide heat-proof resin emulsion

A technology of maleimide and heat-resistant resin, which is applied in the field of polymer emulsion preparation, can solve the problems of slow reaction speed and no polymerization method, and achieve high heat resistance, uniform composition and structure, and good structural uniformity Effect

Active Publication Date: 2010-05-12
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 azobisisobutyronitrile initiator, the patent pointed out that when azobisisobutyronitrile 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 maleimide heat-proof resin emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A. Preparation of monomer mixture

[0049] Add 30 parts of N-phenylmaleimide, 45 parts of styrene, 25 parts of acrylonitrile, 0.35 parts of azobisisobutyronitrile, and 0.1 part of tert-dodecanemercaptan into the mixing tank at 30°C, and start stirring for mixing , forming a homogeneous monomer mixture (a).

[0050] B. Preparation of Monomer Emulsion

[0051] Add 130 parts of desalted water and 3.0 parts of sodium lauryl sulfate into the emulsifier at 30°C, start stirring and add (a) into the emulsifier for emulsification. Emulsify for 30-45 minutes to form monomer emulsion (b). Its pH was determined to be 9-10.

[0052] C. Preparation of heat-resistant resin emulsion

[0053] Add 30 parts of water into the reactor, and after the temperature rises to 79°C, immediately add (b) into the reactor continuously and uniformly and keep the temperature of the system at 80°C to carry out the polymerization reaction. Control the feed rate of (b) so that it is added within 4.5 ...

Embodiment 2

[0059] A. Preparation of monomer mixture

[0060] Add 30 parts of N-phenylmaleimide, 45 parts of styrene, 25 parts of acrylonitrile, 0.35 parts of azobisisobutyronitrile, and 0.15 parts of tert-dodecanemercaptan into the mixing tank at 30°C, and start stirring for mixing , forming a homogeneous monomer mixture (a).

[0061] B. Preparation of Monomer Emulsion

[0062] Add 130 parts of desalted water, 2.2 parts of sodium lauryl sulfate and 1.0 part of synthetic fatty acid potassium into the emulsifier at 30°C, start stirring and add (a) into the emulsifier for emulsification. Emulsify for 30-45 minutes to form monomer emulsion (b). Its pH was determined to be 9-10.

[0063] C. Preparation of heat-resistant resin emulsion

[0064] Add 30 parts of water into the reactor, and after the temperature rises to 79°C, immediately add (b) into the reactor continuously and evenly to mix with (a) and maintain the temperature of the system at 80°C for polymerization. Control the feed ra...

Embodiment 3

[0068] A. Preparation of monomer mixture

[0069] Add 30 parts of N-cyclohexylmaleimide, 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, and start stirring for mixing , forming a homogeneous monomer mixture (a).

[0070] B. Preparation of Monomer Emulsion

[0071] Add 130 parts of desalted water, 1.7 parts of sodium lauryl sulfate and 1.0 part of synthetic fatty acid potassium into the emulsifier at 30°C, start stirring and add (a) into the emulsifier for emulsification. Emulsify for 30-45 minutes to form monomer emulsion (b). Its pH was determined to be 9-10.

[0072] C. Preparation of heat-resistant resin emulsion

[0073] Add 30 parts of water into the reactor, and after its temperature rises to 79°C, immediately add (b) into the reactor continuously and evenly to mix with (a) and maintain the temperature of the system at 80°C for polymerization. Control the fe...

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Abstract

The present invention relates to the preparation method for a maleimide heat-resistant resin emulsion. Maleimide monomer, aryl vinyl monomer, nitrile group - ethylene monomer, oil-soluble thermal decomposition initiator and other agents are added into a mixing trough, and are mixed and stirred to form homogeneous monomer mixed solution (a); Then emulsifier and other agents are added into a reactor, and is stirred; then (a) is added to the reactor for emulsification so as to generate monomer emulsion (b); then desalination water and (b) are added to the reactor for polymerization reaction at the temperature of 60 DEG C to 90 DEG C; after the process, heat-resistant resin emulsion (c) is obtained. 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 componentsof automobiles and domestic appliances.

Description

technical field [0001] The invention relates to a preparation method of a polymer emulsion, in particular to a preparation method of 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 Patents(China)
IPC IPC(8): C08F212/08C08F222/40C08F2/24C08F4/04C08F4/32
Inventor 荔栓红张庆国雷岚梁滔邵卫王永峰王乐
Owner PETROCHINA CO LTD
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