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A novel synthetic method of polyaspartic polyurea resin

A technology of aspartame polyurea resin and a new method, applied in the chemical industry, can solve the problems of high cost, long delivery time, long production cycle, etc., and achieve the effects of short synthesis time, improved protective performance and high conversion rate

Inactive Publication Date: 2018-06-15
郭文祥
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Problems solved by technology

At present, the production cycle of similar products in the market is long, generally at least 7 days for synthesis, high energy consumption, long delivery time, and high cost

Method used

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  • A novel synthetic method of polyaspartic polyurea resin
  • A novel synthetic method of polyaspartic polyurea resin

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specific Embodiment approach

[0014] Such as figure 2 Shown, this aspartic polyurea resin synthetic new method comprises the steps:

[0015] (1) Slowly add multifunctional organic primary amines dropwise to excess dialkyl maleic acid esters (30% of the total excess amount), and cool down while stirring. Incubate at 50°C for 8 hours after adding, take a sample for inspection after 8 hours, when no residual primary amine is detected, the reaction is considered complete, the synthesis is terminated, and the product enters the next production section as a semi-finished product;

[0016] (2) Put the synthesized semi-finished product into a rotary evaporator or a molecular distillation apparatus, and paint or scrape the semi-finished product into a film under the conditions of a vacuum degree of 10 Pa and a temperature of 80-100 ° C. Dialkyl maleate in the semi-finished product It is quickly vaporized and enters the condenser, and is collected together after becoming a liquid, and then used as a raw material f...

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Abstract

The invention discloses a novel synthetic method of polyaspartic polyurea resin, and relates to the technical field of chemical engineering. The method includes two stages, namely a first stage in which a raw material formula and a process are strictly controlled to promote a reaction between an organic primary amine having multiple functional groups and dialkyl maleate, and a second stage in which a target product that is the polyaspartic polyurea resin is obtained with a high convention ratio by subjecting the material synthesized in the first stage to special-process retreatment. The methodwhen used for resin synthesis has advantages of 1) short synthesis time, an increased production efficiency and reduced energy consumption; and 2) a high product conversion ratio, no organic primaryamine or dialkyl maleate monomer in the product, and capability of being more environmentally friendly. After the polyaspartic polyurea resin forms film, the film is dense and protective performance is greatly improved. The polyaspartic polyurea resin is mainly applied in outdoor coatings having stringent requirements on waterproofness, corrosion resistance and weather fastness.

Description

technical field [0001] The invention relates to the technical field of chemical industry, more specifically, the invention relates to a new synthesis method of aspartame polyurea resin. Background technique [0002] Now the environmental pollution is serious, and the country is determined to control it. The VOC emissions of traditional oil-based products have greatly exceeded the standard, and it is urgent to develop water-based and high-solids products. Chinese society is moving towards modernization in an all-round way, and people have higher and higher requirements for the quality of life. This product has excellent performance and long protection time, which is in line with the direction of industrial development. At present, similar products in the market have a long production cycle, generally at least 7 days of synthesis time, high energy consumption, long delivery time, and high costs. Contents of the invention [0003] The problem to be solved by the present in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G71/02
CPCC08G71/02
Inventor 郭文祥
Owner 郭文祥
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