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Production process of polyurethane coating

A polyurethane coating and production process technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of low production efficiency, easy skinning of materials, poor material dispersion, etc., to improve production efficiency, easy to mix and disperse, phase Good capacitive effect

Inactive Publication Date: 2019-11-12
FOSHAN GOLD SILVER RIVER INTELLIGENT EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the industry, traditional gap reactors are mostly used for production. During the production process, all materials such as plasticizers, polyethers, heavy superfine calcium carbonate, silicon dioxide, nano calcium carbonate, etc. are directly added to the reactor. Poor dispersion, uneven mixing, easy skinning of materials in the kettle, low production efficiency

Method used

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  • Production process of polyurethane coating
  • Production process of polyurethane coating
  • Production process of polyurethane coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Embodiment 1 of the present application provides a kind of polyurethane coating, and concrete production step comprises:

[0057] Step 1, according to the addition and parameter of table 1 material, fumed silica, nano-calcium carbonate, heavy superfine calcium carbonate and plasticizer (plasticizer comprises diisononyl phthalate and vegetable oil) Dehydrating and mixing in the first material dehydration kettle to obtain the first material, the water content of the first material is 0.05%;

[0058] Polyether polyols (polyether polyols include polyether diols and polyether triols) and isocyanate are mixed and polymerized in a polymerization tank to obtain the second material, wherein the polyether polyols are dehydrated in a polyether polyol dehydration tank in advance Carry out dehydration in middle, make the water content of polyether polyol be 0.05%;

[0059] Step 2, mixing the first material and the second material in the first mixing device to obtain the third mater...

Embodiment 2

[0072] In Example 2 of the present application, the skinning, particle size and shelf life of the polyurethane coating products in Example 1 and Comparative Example 1 were tested, and the test results are shown in Table 3.

[0073] table 3

[0074] Test items Example 1 Comparative example 1 Crust condition no crust produce crust Product particle size ≤10μm ≤20μm shelf life 18 months 12 months

[0075] The above table shows that, due to the high water content of the material in Comparative Example 1, it is easy to form skins, and the dry skins cannot be broken up by physical methods. Due to the skinning, the dispersion effect is seriously affected.

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Abstract

The present invention relates to the technical field of polyurethane coating, and particularly a production process of polyurethane coating. The process includes 1) mixing fumed silica, nano calcium carbonate, ultrafine ground calcium carbonate and a plasticizer to obtain a first material the water content of which is not more than 0.05%, mixing polyether polyol with isocyanate to obtain a secondmaterial, with the water content of the polyether polyol being not more than 0.05%; 2) mixing the first material with the second material to obtain a third material; 3) mixing the third material witha solvent, a catalyst, an additive and a dispersant to obtain the polyurethane coating. The process enables uniform dispersion and mixing of materials of the polyurethane coating, and reduces a skinning phenomenon of the materials, and the production efficiency of the polyurethane coating is increased.

Description

technical field [0001] The present application relates to the technical field of polyurethane coatings, in particular to a production process of polyurethane coatings. Background technique [0002] Polyurethane coatings are currently the most common type of coatings, which can be divided into two-component polyurethane coatings and one-component polyurethane coatings. Two-component polyurethane topcoat paint is generally composed of isocyanate prepolymers (also known as low molecular carbamate ester polymers) and hydroxyl resins, commonly known as curing agent components and main agent components. There are many varieties of this type of coating, and the application range is also very wide. According to the difference of the hydroxyl group-containing components, it can be divided into acrylic polyurethane, alkyd polyurethane, polyester polyurethane, polyether polyurethane, epoxy polyurethane and other varieties. Generally, they have good mechanical properties, high solid co...

Claims

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Application Information

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IPC IPC(8): C09D175/08C09D7/61C08G18/48
CPCC08G18/4812C08K2003/265C08K2201/011C08K2201/014C09D175/08C09D7/61C08K13/02C08K3/26C08K3/36
Inventor 余淡贤黎明崔俊文
Owner FOSHAN GOLD SILVER RIVER INTELLIGENT EQUIP CO LTD
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