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Single-component fluorine-carbon-aluminum powder baking varnish, preparation, special thinning agent and use method thereof

A single-component, diluent-based technology, applied in coatings, etc., can solve problems such as high energy consumption, high production costs, and gaps in weather resistance, and achieve excellent pollution resistance, beautiful coating appearance, and reduced energy consumption.

Inactive Publication Date: 2008-12-03
SHENZHEN GRANDLAND ENVIRONMENTAL COATING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because PVDF fluorocarbon paint needs to be baked at a high temperature above 230°C, the energy consumption is high and the production cost is high.
Among the few medium and low temperature fluorocarbon baking varnishes in our country's existing patented technologies, they all use trifluoro resins and amino resins or blocked isocyanate resins to cross-link and cure to form films, which effectively solves the problem of high energy consumption, but their weather resistance Compared with PVDF fluorocarbon paint, there is still a certain gap

Method used

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  • Single-component fluorine-carbon-aluminum powder baking varnish, preparation, special thinning agent and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Preparation of fluorocarbon silver powder baking varnish main paint of the present invention:

[0064] Get each component according to the weight listed in "Example 1" listed in Table 1, and the preparation method is as follows:

[0065] Step 1. Pre-dispersion of aluminum-silver paste: Mix aluminum-silver paste and an equal amount of xylene, stir at a low speed until there are no aggregated aluminum powder particles, and set aside;

[0066] Step 2. Take the fluororesin, 20% CAB551-0.2, and amino resin in the components according to the weight ratio, stir and mix evenly at a low to medium speed, then add the dispersant, stir at a medium speed for 5-10 minutes, and then add in parts by weight Leveling agent, methyl isobutyl ketone, propylene glycol methyl ether acetate, acid catalyst, mix well at low to medium speed.

[0067] Step 3. Add the aluminum silver paste pre-dispersed in the above step 1 to the paint obtained in step 2 under low-speed stirring, continue stirring...

Embodiment 2

[0076] With each component weight of " embodiment 2 " listed in table 1, repeat the method described in embodiment 1 (only each component weight changes), prepare fluorocarbon silver powder stoving varnish master paint; Repeat diluent in embodiment 1 The components, proportioning and preparation method were used to prepare the diluent; the main paint and the diluent were mixed uniformly according to 1:0.6, and then the construction and drying were carried out according to the method described in Example 1 to obtain the fluorocarbon silver powder baking paint film. The test results (dry film thickness is the same as in Example 1) are shown in the corresponding data of "Example 2" in Table 2.

Embodiment 3

[0078] With each component weight of " embodiment 3 " listed in table 1, repeat the method described in embodiment 1 (only each component weight changes), prepare fluorocarbon silver powder stoving varnish master paint; Repeat diluent in embodiment 1 The components, proportioning and preparation method were used to prepare the diluent; the main paint and the diluent were mixed evenly according to 10.5, and then the method described in Example 1 was applied and dried to obtain a fluorocarbon silver powder baking paint film, and the routine performance test results (Dry film thickness is the same as embodiment 1) as shown in the corresponding data of " embodiment 3 " in table two.

[0079] Table II

[0080] serial number

[0081] Note: In Table 2, when doing the artificial weathering resistance test, the surface of the paint film should be covered with the same kind of varnish.

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Abstract

A single-component fluorocarbon aluminum paint comprises, by weight ratio, fluororesin 50 to 60, 20 percent CAB551-0.2 6 to 10, aminoresin 10 to 15, dispersant 0.2 to 0.6, acid catalyst 0.4 to 0.8, leveling agent 0.05 to 0.15, non-floating aluminum paste 5.5 to 8.5, pre-dispersant of the non-floating aluminum paste 5.5 to 8.5, and solvent 12 to 20, wherein the fluororesin is the polymer of tetrafluoroethylene / vinyl monomer and has a fluorine content of 35 to 40 percent; and the aminoresin is hexamethoxy methyl melamine resin with solid content equal to or larger than 98 percent. The method for producing the single-component fluorocarbon aluminum paint comprises the following steps: pre-dispersing the aluminum paste; stirring and mixing fluororesin, 20 percent CAB551-0.2 and aminoresin at low to middle speed, adding the dispersant, stirring at middle speed, adding the leveling agent, the acid catalyst and the solvent, and uniformly stirring at low to middle speed; adding the pre-dispersed aluminum paste under low-speed stirring, stirring and dispersing uniformly; and filtering to obtain the fluorocarbon aluminum paint. The invention further relates to a special diluting agent and the use method. The paint has a weathering resistance equal to or even larger than that of PVDF fluorocarbon paint, high hardness and greatly widened color selectivity, and can be re-coated only by baking at middle temperature without special treatment.

Description

technical field [0001] The invention relates to a fluorocarbon silver powder baking varnish and a preparation method thereof, a special thinner and a use method thereof, in particular to a medium-temperature baking single-component fluorocarbon silver powder baking varnish and a preparation method thereof, a special thinner and a use method thereof. Background technique [0002] PVDF fluorocarbon silver powder paint is mostly used for the surface protection and decoration of aluminum curtain wall panels and steel plates for construction. PVDF fluorocarbon paint has very good outdoor weather resistance, and the outdoor service life can reach more than 20 years. However, because PVDF fluorocarbon paint needs to be baked at a high temperature above 230°C, the energy consumption is high and the production cost is high. Among the few medium and low temperature fluorocarbon baking varnishes in our country's existing patented technologies, they all use trifluoro resins and amino re...

Claims

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Application Information

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IPC IPC(8): C09D127/18C09D7/12C09D5/00C09D161/28
Inventor 胡基如
Owner SHENZHEN GRANDLAND ENVIRONMENTAL COATING CO LTD
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