Water-based middle coating high in stone-chip resistance, preparation method and application

A technology with high stone resistance and performance, applied in coatings, polyester coatings, polyurea/polyurethane coatings, etc., can solve the problems of reduced VOC emissions, unqualified stone resistance performance, poor mechanical properties, etc. Efficiency improvement, guaranteed stone chip resistance, gloss reduction effect

Inactive Publication Date: 2019-01-04
LANGFANG NIPPON PAINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantages are: the appearance and performance of the coating film are basically equivalent to the oily formula, but the VOC emission is greatly reduced; the disadvantages are: the solid content is not high, the mechanical properties are not good, especially the flexibility is not good; according to customer feedback, it is resistant to stone impact The performance is not up to standard

Method used

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  • Water-based middle coating high in stone-chip resistance, preparation method and application
  • Water-based middle coating high in stone-chip resistance, preparation method and application
  • Water-based middle coating high in stone-chip resistance, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] The reagents and consumption used in embodiment are as shown in table 1:

[0059] Table 1

[0060]

[0061]

[0062] Step 1: Sanding

[0063] Take a water-based special container, and confirm the shrinkage cavity test result after cleaning. After the shrinkage cavity is qualified, add oil-free saturated polyester, solvent diethylene glycol butyl ether, and a DMEA solution with a pH regulator concentration of 10% according to the parts by weight in Table 1. ;

[0064] Start stirring to 400RPM, after stirring for 5 minutes, add pure water (ED grade), DISPERBYK-180 wetting and dispersing agent and TEGO Dispers 655, co-solvent PRIMEPOL PX-1000, dispersion stabilizer, mixed etherified melamine resin while stirring , the feeding interval between each material is 5 minutes, after the feeding is completed, stir at a speed of 600-800RPM for 15 minutes;

[0065] Stir at a speed of 600-800RPM, continue to add anti-cratering agent GK-19, fumed silica, carbon black, titaniu...

Embodiment 2

[0083] The reagents and consumption used in embodiment are as shown in table 2:

[0084] Table 2

[0085]

[0086]

[0087]

[0088] Step 1: Sanding

[0089] Take a water-based special container, confirm the shrinkage cavity test result after cleaning, and add oil-free saturated polyester, solvent diethylene glycol butyl ether, and a DMEA solution with a pH regulator concentration of 10% according to the parts by weight in Table 2 after the shrinkage cavity is qualified. ;

[0090] Start stirring to 400RPM. After stirring for 5 minutes, add pure water (ED grade), DISPERBYK-192 wetting and dispersing agent and BORCHI GEN1252, co-solvent PRIMEPOL PX-1000, dispersion stabilizer, mixed etherified melamine resin while stirring, The feeding interval between each material is 5 minutes. After the feeding is completed, stir at a speed of 600-800 RPM for 15 minutes;

[0091] Stir at a speed of 600-800RPM, continue to add anti-cratering agent GK-19, fumed silica, carbon black...

Embodiment 3

[0109] The reagents and consumption used in embodiment are as shown in table 3:

[0110] table 3

[0111]

[0112]

[0113] Step 1: Sanding

[0114]Get the water-based special container, confirm the shrinkage cavity test result after cleaning, and add oil-free saturated polyester, solvent ethylene glycol butyl ether, and a DMEA solution with a pH regulator concentration of 10% according to the parts by weight in Table 3 after the shrinkage cavity is qualified;

[0115] Start stirring to 400RPM, after stirring for 5 minutes, add pure water (ED grade), DISPERBYK-190 wetting and dispersing agent and TEGO WET 280, co-solvent PRIMEPOL PX-1000, dispersion stabilizer, mixed etherified melamine resin while stirring , the feeding interval between each material is 5 minutes, after the feeding is completed, stir at a speed of 600-800RPM for 15 minutes;

[0116] Stir at a speed of 600-800RPM, continue to add anti-cratering agent GK-19, fumed silica, carbon black, titanium dioxide,...

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Abstract

The invention discloses water-based middle coating high in stone-chip resistance. The water-based middle coating is prepared from, by weight, 2-10 parts of oil-free saturated polyester, 15-35 parts ofmodified alkyd resin, 15-35 parts of water-based polyester resin, 2-10 parts of mixed etherified melamine resin, 2-10 parts of methylated amino resin, 1-5 parts of blocked isocyanate, 2-10 parts of polyurethane resin, 10.4-78 parts of pigment and filler, 0.6-21.5 parts of pH regulating agent, 2.61-9.3 parts of additive and 11.2-37 parts of solvent. The coating film gloss of the water-based middlecoating high in stone-chip resistance is effectively controlled to be about 75, and the gloss of the original formula is up to 85; the stone-chip resistant effect of original middle coating is judgedas Class 5 according to the Great Wall standards, and the original middle has the phenomenon that a steel plate is exposed; the stone-chip resistant effect of the water-based middle coating high in stone-chip resistance can reach Class 7, and the phenomenon that the steel plate is exposed does not occur.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a water-based intermediate coating with high stone chip resistance, a preparation method and an application. Background technique [0002] At present, my country's requirements for VOC emissions are becoming more and more stringent. In order to protect the living environment, enhance international exchanges and cooperation in painting technology, and improve the level of my country's automobile painting technology, automobile companies should consider using water-based paint. The biggest advantage of water-based paint is that the coating quality is comparable to that of traditional solvent-based paint, but the VOC emission is small, and its emission is about one-third of that of solvent-based paint. [0003] The commonly used system for water-based high-temperature baking varnish is polyester-amino or acrylic-amino, and the main resin is usually a hydroxyl-containin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/08C09D167/00C09D161/32C09D175/04C09D7/61C09D7/65
CPCC08L2205/025C08L2205/035C09D167/00C09D167/08C09D7/61C09D7/65C08L67/00C08L61/32C08L75/04C08K3/34C08L67/08
Inventor 倪小斌
Owner LANGFANG NIPPON PAINT
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