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Water absorption coating, preparation method and coating method

A water absorption and coating technology, applied in polyester coatings, polyamide coatings, lignin coatings, etc., can solve the problems of affecting the air circulation on the surface of the heat exchanger, the frost suppression effect is not obvious, and the impact resistance is poor. The cream effect is obvious, the frost suppression effect is improved, and the filling amount is large.

Inactive Publication Date: 2012-10-03
TIANCHANG YINHU PAINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Most of the existing coatings with anti-frost effect are too thick, which affects the air circulation on the surface of the heat exchanger, and the resistance loss is large. In the case of high ambient humidity, the anti-frost effect is not obvious, and the coating surface is relatively soft. Poor impact resistance
In addition, the film thickness, surface hardness, and anti-frost effect under high humidity conditions of existing coatings still need to be improved.

Method used

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  • Water absorption coating, preparation method and coating method
  • Water absorption coating, preparation method and coating method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1 The making of polyacrylic acid water-absorbing resin

[0040] Add water, potassium hydroxide and sodium hydroxide to a reactor with a reflux condenser and a dropping funnel nitrogen conduit, and add acrylic acid and N,N'-methylenebisacrylamide under the condition of feeding nitrogen, while Hydroxypropyl methacrylate was added while stirring, keeping the temperature at 40°C. Add acrylamide, add ammonium persulfate initiator and sodium bisulfite in 4 times. It was heated to 60°C and left to stand for 6 hours to carry out a polymerization reaction. After the polymerization reaction, the mixture changes from a white turbid gel to a transparent gel, is cooled and vacuum dehydrated, and then vacuum dried, and the product is ground to obtain a polyacrylic acid water-absorbing resin with a particle size below 0.025 mm.

Embodiment 2

[0041] The preparation of embodiment 2 water-absorbent coatings

[0042] First prepare raw materials according to the following parts by weight: polyacrylic acid water-absorbing resin 8; acrylic resin 20; sodium chloride crystal particles 20; industrial hemp stalk core powder 22; viscosity regulator 5; Stir evenly; add polyacrylic acid water-absorbing resin, stir evenly; then add industrial hemp stalk core powder, stir evenly; then add acrylic resin, viscosity modifier, sodium chloride crystal particles, stir evenly, and filter with a 40-100 mesh screen ,Package.

[0043] The auxiliary agent is as follows: the dispersant is sodium hexametaphosphate, the defoamer is tributyl phosphate, the plasticizer is dibutyl phthalate, the retarder is citric acid, and the expansion The inhibitor is alum.

[0044] The solvent of the present embodiment is propylene glycol butyl ether.

Embodiment 3

[0045] The preparation of embodiment 3 water-absorbent coatings

[0046] First prepare raw materials according to the following parts by weight: polyacrylic acid water-absorbing resin and polyamide-6632; polyurethane 12; sodium chloride, potassium chloride crystal particles 24; industrial hemp stalk powder 15; viscosity regulator 18; After the conventional amount of additives, stir well; then add polyacrylic acid water-absorbing resin and polyamide-66, stir well; then add industrial hemp stalk powder, stir well; then add acrylic resin, viscosity modifier, sodium chloride, chlorine Potassium chloride crystal particles, stirred evenly, filtered with a 40-100 mesh screen, and packaged.

[0047] The auxiliary agent is as follows: the dispersant is sodium hexametaphosphate, the defoamer is tributyl phosphate, the plasticizer is dibutyl phthalate, the retarder is citric acid, and the expansion The inhibitor is alum.

[0048] The solvent of this embodiment is cyclohexanone.

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Abstract

The invention relates to a water absorption coating, a preparation method and a coating method. The coating comprises the following components: polyacrylic acid water absorption resin and / or polyamide resin; metal baking varnish adhesive; sodium chloride and / or potassium chloridecrystal particle; and industrial hemp stalk core powder. The preparation method of the coating comprises the following steps of: weighting all kinds of raw materials according to proportions firstly, preparing the water absorption resin, uniformly stirring other raw materials, filtering and packaging. The water absorption coating is coated on a product in use. According to the invention, the shock resistance on the surface of the coating is enhanced, the impact strength is more than 68 kg.cm / cm<2>; meanwhile, the frost inhibition effect is remarkably improved, in particular under the conditions of high humidity and low wall temperature. For example, when the ambient humidity is greater than 55% and the cold surface temperature is lower than -10 DEG C, the coating, provided by the invention, can delay the occurrence of frost crystal for more than 5 hours, and the frost inhibition effect under the ambient conditions of high humidity and low wall temperature is rather obvious.

Description

technical field [0001] The invention belongs to the technical field of water-absorbing coatings, and in particular relates to a coating with strong water absorption, a preparation method of the coating, and a method of coating products. . Background technique [0002] Article deterioration due to moisture intrusion is a well-known problem for articles used outdoors where the surfaces are exposed. Such deterioration includes oxidative deterioration due to the reaction between water and the surface of the reinforcing fibers used in these articles, as well as corrosion caused by water. In marine environments, questions about flooding also relate to the salinity of the environment. The presence of salt in this aqueous environment accelerates oxidative decomposition. In salt-free environments, such as those with high atmospheric humidity, water-resistant coatings are required to protect structures and equipment surfaces from moisture-induced decomposition. [0003] Articles a...

Claims

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Application Information

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IPC IPC(8): C09D197/02C09D133/00C09D177/02C09D177/06C09D167/08C09D175/04C09D7/12B05D5/00
Inventor 管伟
Owner TIANCHANG YINHU PAINT
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