A kind of water-based primer and construction technology thereof

A water-based primer and construction technology, applied in primers, coatings, polyurea/polyurethane coatings, etc., can solve the problems of insufficient appearance, high cost, and long grinding time.

Active Publication Date: 2021-05-14
江阴名鸿车顶系统有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing solvent-based primer, due to its poor hiding ability, must be polished before painting (for spoilers and license plates, the current painting method is still mainly spraying), which takes a long time and costs a lot. At present, it is necessary to use 320u sanding surface to polish several times; another disadvantage of solvent-based primer is that the appearance of the product is not bright enough

Method used

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  • A kind of water-based primer and construction technology thereof
  • A kind of water-based primer and construction technology thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The invention is a water-based primer, which includes water-based polyolefin resin, unsaturated carboxylic acid or acid anhydride modified polyolefin, water-based epoxy resin, water-based acrylic resin, and the weight ratio of primer and curing agent is 100:10. Unsaturated carboxylic acid or acid anhydride modified polyolefin is polyolefin modified with maleic acid or maleic anhydride, the mass ratio of each component is calculated based on solid content: 10 to 30 parts of water-based polyolefin resin, 25 parts ~40 parts of unsaturated carboxylic acid or anhydride modified polyolefin, 5~10 parts of water-based epoxy resin, 15-20 parts of water-based acrylic resin; the curing agent is at least one polyisocyanate with a weight percentage of 40-70 parts curing agent and 15-70 parts of γ-butyrolactone. The hydroxyl value of water-based acrylic resin is 10-70mgKOH / g, and the acid value is 80-120mgKOH / g. The unsaturated carboxylic acid or acid anhydride modified polyolefin h...

Embodiment 2

[0033] The difference from Embodiment 1 is that, as figure 1 , figure 2 Shown, the construction technique of water-based primer comprises the following steps:

[0034] Stir each component of the above-mentioned weight content without foam for more than 15 minutes, adopt the spot coating method, and then rotate the workpiece 1 after spot-coating the primer on the workpiece 1, and select a suitable primer for spot coating according to the shape of the pattern on the final painted workpiece 1 The amount and the rotation speed of the workpiece 1; and the workpiece 1 is dried when the workpiece 1 is rotated, and the drying time is 10 minutes; the drying temperature is 80°C. In the dispensing process, a profiling annular baffle plate 2 that is relatively stationary relative to the rotating workpiece 1 is set against the workpiece 1 . A circular turntable 3 is set under the workpiece 1, and the circular turntable 3 is rotated and set on the square base 4. The middle part of the sq...

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Abstract

The invention discloses a water-based primer, which comprises water-based polyolefin resin, unsaturated carboxylic acid or acid anhydride modified polyolefin, water-based epoxy resin, water-based acrylic resin, and the weight ratio of primer and curing agent is 100:10 , Unsaturated carboxylic acid or acid anhydride modified polyolefin is polyolefin modified with maleic acid or maleic anhydride, the mass ratio of each component is calculated based on solid content: 10 to 30 parts of water-based polyolefin resin, 25-40 parts of unsaturated carboxylic acid or acid anhydride modified polyolefin, 5-10 parts of water-based epoxy resin, 15-20 parts of water-based acrylic resin; the curing agent is at least one polyolefin with a weight percentage of 40-70 parts An isocyanate curing agent and 15-70 parts of γ-butyrolactone. The present invention greatly reduces air pollution and greatly reduces the damage to human health; the dry film resistance is high, and the paint rate of the colored paint is increased, thereby reducing the use of colored paint; the present invention has strong covering ability and reduces the cost of polishing .

Description

technical field [0001] The invention relates to the industry of spraying exterior and interior decorations, in particular to the spraying industry of automobile exterior and interior decorations, in particular to a water-based primer and a construction process thereof. Background technique [0002] Water-based primer is the abbreviation of water-soluble environment-friendly metal protective primer. Composed of water-based resin, lead-free pigment, water, etc., it has the characteristics of fast drying and excellent protection performance, and can be used as the bottom protection coating for metal substrates. The coating can be applied by dip coating, flow coating, spray coating, etc. It is suitable for the coating of metal substrates in industrial equipment, vehicles and civil products, especially for the protective coating of the surface of export steel products. However, at present, water-based primers have not yet been used for spraying on exterior parts of automobiles i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D7/20C08G18/58C08G18/62B05D1/00B05C9/02B05C9/14B05D1/02
CPCB05C9/02B05C9/14B05D1/005B05D1/02C08G18/58C08G18/6204C08G18/6216C09D5/002C09D175/04C09D7/20
Inventor 陈立奎林科徐俊封晓平吉德成
Owner 江阴名鸿车顶系统有限公司
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