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Polymer capable of being used for pigment coating, polymer-coated pigment, preparation method of polymer-coated pigment and inorganic coating

A technology for coating pigments and polymers, applied in the field of pigments, can solve the problems of easy flocculation, no color solution, poor long-term stability, etc., and achieve good long-term storage stability, excellent long-term stability, and good alkali resistance. Effect

Pending Publication Date: 2022-04-15
ASIA CUANON TECH SHANGHAI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the coloring application of inorganic coatings is still in its infancy in China, and there is no relatively mature color solution. The main problem is that the colorants used are poor in alkali resistance, and they are prone to flocculation, floating color and hair loss when applied in inorganic coatings. flowers etc.
At the same time, the long-term stability in inorganic coatings is poor, and it is prone to problems such as discoloration after storage.
[0003] At present, the method adopted by some colorant suppliers is to disperse the pigment powder with a dispersant with better alkali resistance, prepare a color paste and add it to the inorganic coating for use, but only consider the alkali resistance of the colorant and not the application to inorganic Long-term stability in coatings

Method used

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  • Polymer capable of being used for pigment coating, polymer-coated pigment, preparation method of polymer-coated pigment and inorganic coating
  • Polymer capable of being used for pigment coating, polymer-coated pigment, preparation method of polymer-coated pigment and inorganic coating
  • Polymer capable of being used for pigment coating, polymer-coated pigment, preparation method of polymer-coated pigment and inorganic coating

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preparation example Construction

[0063] According to a second aspect of the present invention, the above-mentioned preparation method of the polymer that can be used for pigment coating comprises the following steps:

[0064] Mix the diol polymer with isophorone diisocyanate for reaction, and then add polyetheramine for capping reaction to obtain a polymer that can be used for pigment coating;

[0065] Wherein, the diol polymer comprises any one or a combination of at least two of polyethylene glycol polyethers, polypropylene glycol polyethers or polycarbonate diols;

[0066] Polyetheramines include the polyetheramine designated Jeffamine M2070.

[0067] Only by reacting isophorone diisocyanate with the above-mentioned specific types of diol polymers and specific types of polyether amines can the polymers with the above-mentioned specific structures be obtained, and the pigments can be protected while covering the pigments, so that the pigments can be used at high temperatures. It has better persistence in a...

Embodiment approach

[0069] As an optional embodiment of the present invention, the reaction temperature of the diol polymer and isophorone diisocyanate is 60-90°C, and the reaction time is 1-4h.

[0070] Typical but non-limiting reaction temperatures are 60°C, 62°C, 64°C, 65°C, 66°C, 68°C, 70°C, 72°C, 74°C, 75°C, 76°C, 78°C, 79°C, 80°C °C, 81 °C, 82 °C, 84 °C, 85 °C, 86 °C, 88 °C or 90 °C, typical but non-limiting reaction times are 1 h, 2 h, 3 h or 4 h.

[0071] As an optional embodiment of the present invention, the temperature of the capping reaction is 40-50° C., and the reaction time is 2-3 hours.

[0072] A typical but non-limiting capping reaction temperature is 40°C, 42°C, 44°C, 45°C, 46°C, 48°C or 50°C, and a typical but non-limiting reaction time is 2h, 2.5h or 3h.

[0073] According to a third aspect of the present invention, there is also provided a polymer-coated pigment, including an inorganic pigment, a polymer coated on the surface of the inorganic pigment, and optional additives...

Embodiment 1

[0112] This embodiment provides a kind of polymer that can be used for pigment encapsulation, and the preparation method of this polymer comprises the following steps:

[0113] Put 2000 grams of polycarbonate diol PCDL2000 (dihydric alcohol with a number average molecular weight of 2000) into a completely dry glass reactor, raise the temperature to 100±2°C, stir, vacuum dehydrate and degas for 3 hours, and cool down to 40±2°C ℃, then add 444.64 grams of IPDI, react at 80±2℃ for 2 hours, cool down to 40℃, add 4000 grams of Jeffamine M2070 for capping, and react for 2 hours to obtain a polymer that can be used for pigment coating.

[0114] The prepared polymer that can be used for pigment coating has a general structural formula shown in formula (1).

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Abstract

The invention provides a polymer capable of being used for pigment coating, a polymer-coated pigment, a preparation method of the polymer-coated pigment and an inorganic coating, and relates to the technical field of pigments. The polymer has a specific structure, can be used for coating the pigment and can effectively protect the pigment, so that the pigment has better durability and better long-term storage stability in a high-alkalinity environment. The invention also provides a polymer coated pigment, which comprises an inorganic pigment, the polymer coated on the surface of the inorganic pigment, and an optional additive, the polymer coated pigment has good alkali resistance and excellent long-acting stability, and can be stored in an inorganic coating system for a long time without discoloration, flocculation and the like. The invention further provides a preparation method of the polymer-coated pigment, the preparation method is simple and convenient to operate, the polymer-coated pigment can be prepared through relatively conventional equipment, and industrial production is easy to realize.

Description

technical field [0001] The invention relates to the technical field of pigments, in particular to a polymer that can be used for coating pigments, a polymer coated pigment, a preparation method thereof, and an inorganic coating. Background technique [0002] Due to the excellent performance advantages of inorganic coatings, their application has been more and more respected by people in recent years. However, the coloring application of inorganic coatings is still in its infancy in China, and there is no relatively mature color solution. The main problem is that the colorants used are poor in alkali resistance, and they are prone to flocculation, floating color and hair loss when applied in inorganic coatings. flowers etc. At the same time, the long-term stability in inorganic coatings is poor, and problems such as discoloration after storage are prone to occur. [0003] At present, the method adopted by some colorant suppliers is to disperse the pigment powder with a disp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/75C08G18/48C08G18/44C08G18/50C09C1/24C09C3/10C09D1/00C09D7/62
CPCC09C1/24C09C3/10C08G18/755C08G18/4833C08G18/4825C08G18/44C08G18/5021C09D1/00C09D7/62
Inventor 郑帆徐志新李金钟
Owner ASIA CUANON TECH SHANGHAI