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Thick film type polyurethane finish paint

A polyurethane topcoat and thick film technology, applied in the field of coatings, can solve the problems of time-consuming and labor-consuming, and achieve the effect of simplifying the coating system, less solvent content and high hardness

Active Publication Date: 2013-03-20
TIANJIN HAINALONG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Due to the thin film thickness of the existing polyurethane topcoat, usually around 25μm, to obtain a thicker dry film thickness must be painted many times, so it is labor-intensive and time-consuming, and heavy-duty anti-corrosion projects just need a thick film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: A kind of thick-film type polyurethane topcoat is made according to following weight ratio by following raw material: alkyd resin 40Kg, hydroxyl acrylic resin 20Kg, aliphatic polyisocyanate 15Kg, titanium dioxide 25Kg, defoamer 0.2Kg , dispersant 0.5Kg, leveling agent 0.2Kg, rheological additive 10Kg, organic bentonite 3Kg, butyl ester 10Kg, xylene 5Kg. Specific to this example, the processing process is to add Guolong 1300F alkyd resin first, and then add Billions titanium dioxide, organic bentonite, rheological additive Deqian 229 (polyamide wax), xylene, and butyl ester in sequence , Dispersant Xutai 904s (a mixture of high molecular carboxylic acid and modified polysiloxane) is dispersed with a high-speed disperser, and ground after the dispersion is uniform. When the fineness is 20 μm, stop grinding and enter the paint mixing process, and add in sequence Deqian hydroxy acrylic resin 3060, leveling agent Xutai 432 (modified polysiloxane), defoamer Xuta...

Embodiment 2

[0024] Embodiment 2: a kind of thick-film type polyurethane topcoat is made according to following weight ratio by following raw material: alkyd resin 50Kg, hydroxyl acrylic resin 30Kg, aliphatic polyisocyanate 24Kg, titanium dioxide 25Kg, defoamer 0.5Kg , dispersant 0.5Kg, leveling agent 0.2Kg, rheological additive 30Kg, organic bentonite 7Kg, butyl ester 20Kg, xylene 15Kg. Specific to this example, the processing process is to add Guolong 1300F alkyd resin first, and then add Billions titanium dioxide, organic bentonite, rheological additive Deqian 229 (polyamide wax), xylene, and butyl ester in sequence , Dispersant Xutai 904s (a mixture of high molecular carboxylic acid and modified polysiloxane) is dispersed with a high-speed disperser, and ground after the dispersion is uniform. When the fineness is 20 μm, stop grinding and enter the paint mixing process, and add in sequence Deqian hydroxy acrylic resin 3060, leveling agent Xutai 432 (modified polysiloxane), defoamer Xut...

Embodiment 3

[0025] Embodiment 3: a kind of thick-film type polyurethane topcoat is made according to following weight ratio by following raw material: alkyd resin 42Kg, hydroxyl acrylic resin 23Kg, aliphatic polyisocyanate 17Kg, titanium dioxide 20Kg, defoamer 0.1Kg , dispersant 0.2Kg, leveling agent 0.1Kg, rheological additive 10Kg, organic bentonite 2Kg, butyl ester 13Kg, xylene 8Kg. Specific to this example, the processing process is to first add Guolong 1300F alkyd resin, and then add Billions titanium dioxide, organic bentonite, rheological additive Deqian 229 (polyamide wax), xylene, and butyl ester in sequence , Dispersant Xutai 904s (a mixture of high molecular carboxylic acid and modified polysiloxane) is dispersed with a high-speed disperser, and then ground after the dispersion is uniform. Deqian hydroxy acrylic resin 3060, leveling agent Xutai 432 (modified polysiloxane), defoamer Xutai 6500 (modified polysiloxane), and then high-speed dispersion, uniform dispersion, then ente...

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PUM

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Abstract

The invention discloses thick film type polyurethane finish paint, belongs to the technical field of novel materials, and relates to the field of heavy corrosion protection engineering. The materials of the thick film type polyurethane finish paint include alkyd resins, hydroxyl acrylic resins, aliphatic series polyisocyanate, titanium dioxide, antifoaming agents, dispersing agents, flatting agents, rheological additives, organobentonite, and diluents, wherein the content of the aliphatic series polyisocyanate, titanium dioxide is 25%-30% the total weight of the alkyd resins and the hydroxyl acrylic resins. The thick film type polyurethane finish paint has the advantages that in spraying, the range of a dry film is 50-60 micrometers, traditional 3-4 coating procedures are simplified to be 2-3 coating procedures, a coating system is simplified, construction time is shortened, the coating speed is accelerated, and meanwhile the manufacture efficiency of steel structure is improved; and due to the fact that solvent content in the paint is little, pollution to the environment is reduced.

Description

technical field [0001] The invention relates to a coating, in particular to a thick-film polyurethane topcoat. Background technique [0002] The coating containing a certain number of urethane chains (-NH-CO-O-) in the film-forming polymer structure is called polyurethane coating. It is usually obtained by the reaction of isocyanate groups and hydroxyl-containing compounds. The reaction formula is as follows: [0003] R-N=C=O+R′-OH→R-NH-CO-OR′ [0004] In addition to urethane bonds, polyurethane coatings also contain many ester bonds or unsaturated double bonds, isocyanurate bonds, urea bonds, allophanate bonds, ether bonds, etc. [0005] Therefore, the coating has rich and excellent properties: [0006] ① There are a lot of hydrogen bonds in the paint film, so the paint film is strong, wear-resistant, bright, plump and has good adhesion. [0007] ② By adjusting the segment chain length, distribution and cross-linking density, the coating film with the required mechanical...

Claims

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Application Information

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IPC IPC(8): C09D175/06C09D175/04C09D7/12
Inventor 马健钧丁宝昌丁少峰
Owner TIANJIN HAINALONG CHEM