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Preparation method of anti-corrosive polyurea elastomer coating

A polyurea elastomer and coating technology, which is applied in the direction of anti-corrosion coatings and coatings, can solve the problems of low anti-corrosion performance and difficulty in meeting the requirements of harsh environments

Inactive Publication Date: 2018-04-20
长沙盾甲新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The Chinese patent with the application number 20121057965.1 discloses a kind of anti-corrosion material for bridge piers of cross-sea bridges. Although the adhesion has been improved, the anti-corrosion performance is low, and it is difficult to meet the requirements of harsh environments.
In summary, the existing polyurea elastomer coatings are difficult to meet the requirements of high adhesion and high corrosion resistance at the same time

Method used

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  • Preparation method of anti-corrosive polyurea elastomer coating
  • Preparation method of anti-corrosive polyurea elastomer coating
  • Preparation method of anti-corrosive polyurea elastomer coating

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preparation example Construction

[0031] The present invention also provides a kind of preparation method of anticorrosion polyurea elastomer coating, comprises the following steps:

[0032] (1) Carry out vacuum dehydration treatment on polyether diol, react the dehydrated polyether diol, diisocyanate and diluent in an inert gas atmosphere at 40-95°C for 2-4 hours, cool and discharge, Obtain component A;

[0033] (2) Dehydrate the amino-terminated polyether and the amine chain extender in the reaction kettle under reduced pressure, then add composite reinforcing materials and catalysts, stir at 40-60°C for 1-2 hours, ultrasonicate for 5-15 minutes, and cool Discharging to obtain component B;

[0034] Wherein, the composite reinforcing material includes epoxy resin, polyamide resin, BYK additives and silicon dioxide.

[0035] According to the present invention, by ultrasonically treating component B in the present invention, the uniformity and reactivity between the components can be improved, the mutual reac...

Embodiment 1

[0041] (1) Pour 45 parts by weight of polyoxypropylene glycol into the reactor for vacuum dehydration. The temperature of vacuum dehydration is 120°C, the pressure is -0.1MPa, and the extraction time is 2h, then the temperature is lowered to 65°C, and the Add 50 parts by weight of MDI-5005 and 5 parts by weight of ethyl carbonate, then raise the temperature to 60°C for 3 hours, cool and discharge to obtain component A;

[0042] (2) 44.5 parts by weight of D-230 and 28.4 parts by weight of MoCA were respectively dehydrated under reduced pressure in a reactor. 8118(M), 11.61 parts by weight of epoxy resin, 7.29 parts by weight of polyamide resin, 7.02 parts by weight of BYK additives and 1.08 parts by weight of silica, stirred at 50 ° C for 1.5 h, and ultrasonicated at 400 W for 10 min, Cooling and discharging to obtain component B.

[0043] The content of each component in component A in this embodiment is shown in Table 1, and the content of each component in component B is ...

Embodiment 2

[0050] (1) Pour 55 parts by weight of polytetrahydrofuran glycol into the reactor for vacuum dehydration. The temperature of vacuum dehydration is 120°C, the pressure is -0.1MPa, and the extraction time is 2h, then the temperature is lowered to 65°C, and the Add 37 parts of PAPI and 8 parts of di-n-octyl phthalate, then raise the temperature to 75°C for 2.5 hours, cool and discharge to obtain component A;

[0051] (2) 50.2 parts by weight of T-403 and 34.5 parts by weight of DADMT were respectively dehydrated under reduced pressure in a reactor. Z, 7.5 parts by weight of epoxy resin, 4.5 parts by weight of polyamide resin, 2.25 parts by weight of BYK additives and 0.75 parts by weight of silica, stirred at 50°C for 1.5h, ultrasonicated at 400W for 10min, cooled and discharged , to obtain component B.

[0052] The content of each component in component A in this embodiment is shown in Table 3, and the content of each component in component B is shown in Table 4.

[0053] Tab...

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Abstract

The invention relates to the technical field of polyurea coatings, and in particular relates to an anti-corrosive polyurea elastomer coating and a preparation method thereof. The anti-corrosive polyurea elastomer coating comprises a component A and a component B. The preparation method comprises the following steps: (1) carrying out vacuum dehydrating treatment on polyether glycol, carrying out reaction on dehydrated polyether glycol, diisocyanate and a diluent in an inert gas atmosphere for 2-4h at 40-95 DEG C, and cooling and discharging the mixture to obtain the component A; and (2) separately carrying out dehydration at a reduced pressure on terminal amino polyether and an amine chain extender in a reaction kettle, then adding a composite enhancing material and a catalyst, stirring themixture for 1-2h at 40-60 DEG C, carrying out ultrasonic treatment for 5-15min, and cooling and discharging the mixture to obtain the component B. By means of ultrasonic treatment, the uniformity andreacting activity of the components can be improved to promote interaction among the components, and the crosslinking degree of the composite enhancing material and the polyurea elastomer coating isimproved, so that the binding strength of the polyurea elastomer coating is improved.

Description

technical field [0001] The invention relates to the technical field of polyurea coatings, in particular to a preparation method for anti-corrosion spraying polyurea elastomer coatings. Background technique [0002] Spraying polyurea elastomer coating is a new type of material that does not contain volatile organic compounds (VOC), is environmentally friendly and has high protection performance. It is constructed by anti-corrosion mixed spraying and has the advantages of waterproof, anti-corrosion, aging resistance, wear resistance and decoration. . [0003] In the prior art, polyurea elastomer coatings are mainly waterproof and wear-resistant. For example, Chinese patent application number 201010180482.5 discloses a new type of nanocomposite polyurea coating, which uses carbodiimide to modify diphenylmethane - 4,4'diisocyanate and polyether triol synthetic prepolymer, using amino-terminated diamine as chain extender to improve the anti-corrosion performance of the product, ...

Claims

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Application Information

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IPC IPC(8): C09D175/02C09D5/08C08G18/10C08G18/66C08G18/48C08G18/50C08G18/32
CPCC09D175/02C08G18/10C08G18/482C08G18/5021C08G18/6685C08G2150/90C09D5/08C08G18/3814C08G18/3868C08G18/3243
Inventor 罗世彬裘航盛
Owner 长沙盾甲新材料科技有限公司
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