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Production of maleimide resin emulsion

A maleimide and resin-like technology, which is applied in the field of polymer emulsion preparation, can solve the problems of polymerization method discussion and slow reaction speed, and achieve the effects of uniform composition and structure, stable reaction process and high yield

Active Publication Date: 2007-06-20
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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  • Production of maleimide resin emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A. Preparation of monomer mixture

[0044] At 30°C, 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-dodecylmercaptan into the mixing tank, and start stirring Mixing is carried out to form a homogeneous monomer mixture (a).

[0045] B. Preparation of resin emulsion

[0046] Add 160 parts of desalted water and 3.5 parts of sodium lauryl sulfate into the reactor equipped with a stirring device at 30°C, start the stirring, emulsify for 30 minutes to heat up, and maintain the temperature of the system at 75°C, at 5 Continuously add (a) into the reactor to carry out the polymerization reaction within one hour; After the feeding is finished, the system temperature is raised to 95° C., and the polymerization reaction is carried out for another 1.0 hour, and the total solid content is measured by sampling. After passing (37.3%), the A resin emulsion (b) is formed.

[0047] 5.0% potas...

Embodiment 2

[0052] A. Preparation of monomer mixture

[0053] At 35°C, add 5 parts of N-phenylmaleimide, 65 parts of styrene, 30 parts of acrylonitrile, 0.55 parts of azobisisobutyronitrile, and 0.12 parts of tert-dodecanemercaptan into the mixing tank, and start stirring Mixing is carried out to form a homogeneous monomer mixture (a).

[0054] B. Preparation of resin emulsion

[0055] Add 150 parts of desalted water and 3.5 parts of sodium dodecylbenzenesulfonate into the reactor equipped with a stirring device at 35°C, start stirring, emulsify for 40 minutes to heat up, and maintain the temperature of the system at 60°C. Continuously (a) is joined in the reactor in 7 hours and carries out polymerization reaction; After feeding finishes, system temperature is raised to 90 ℃, and polymerization reaction is carried out again 1.0 hour, and sampling measures total solid content, after passing (38.1% ) That is, the resin emulsion (b) is formed. After the polymerization of (b) is completed,...

Embodiment 3

[0059] A. Preparation of monomer mixture

[0060] At 28°C, add 30 parts of N-phenylmaleimide, 45 parts of styrene, 25 parts of acrylonitrile, 0.45 parts of azobisisobutyronitrile, and 0.11 parts of tertiary dodecylmercaptan into the mixing tank, and start stirring Mixing is carried out to form a homogeneous monomer mixture (a).

[0061] B. Preparation of resin emulsion

[0062] Add 170 parts of desalted water, 2.3 parts of sodium lauryl sulfate, and 1.5 parts of synthetic fatty acid potassium into the reactor equipped with a stirring device at 28°C, start stirring, emulsify for 30 minutes to heat up, and maintain the temperature of the system at At 75°C, continuously add (a) into the reactor for polymerization within 5 hours; after the addition, raise the temperature of the system to 95°C, carry out the polymerization for another 1.0 hour, take a sample to measure the total solid content, and pass Afterwards (36.7%) the resin emulsion (b) is formed. After the polymerization...

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Abstract

Production of maleimide resin emulsion is carried out by adding maleimide monomer, aryl vinyl monomer, nitrile aryl monomer and evocating agent into mixing tank, agitating while mixing to obtain homogeneous monomer mixed liquid(a), adding emulsifier into reactor, agitating while raising temperature, adding (a) into reactor continuously, and polymerizing to form resin emulsion(b). It has excellent appearance and uniform structure, better heat-resistance and polymerization efficiency. It can be used to modify ABS, PC and PBT materials and parts of vehicles and household electrical appliances.

Description

technical field [0001] The invention relates to a method for preparing a polymer emulsion, in particular to a method for preparing a maleimide 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 vinyl monomer (AE...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F2/26C08F222/40
Inventor 荔栓红王乐邵卫雷岚梁滔王永峰张守汉
Owner PETROCHINA CO LTD
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