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Coating composition for weather-resistant steel plate

A composition and weather resistance technology, applied in the direction of polyester coatings, coatings, etc., can solve the problems of difficult large-area construction, poor metal adhesion, high production cost, etc., and achieve excellent adhesion and processability, heat resistance and The effects of better hot hardness and excellent solvent resistance

Inactive Publication Date: 2015-03-11
CHENGDU JINHUI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the advancement of technology, it is found that silicone resin also has better heat resistance. The basic skeleton of silicone resin is the main chain of Si-O, which has higher bond energy than the C-C bond of ordinary polymers. Heat resistance and anti-oxidation are also strong. Normally, the heat resistance temperature of silicone resin is 300°C. It has been proved by practice that in addition to heat resistance, silicone resin also shows excellent weather resistance and stain resistance. , water removal, cold resistance and chemical corrosion resistance, etc., but in actual use, there are still the following problems, such as: need high temperature curing (above 250 ℃) and long curing time, difficult large-scale construction, adhesion to metal Poor, poor solvent resistance and high production cost, for this reason, we must find a high-performance material that can replace silicone resin, and at the same time, it also needs to have higher heat resistance than the existing polyester resin or epoxy resin

Method used

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  • Coating composition for weather-resistant steel plate

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Experimental program
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Effect test

Embodiment 1

[0023] The coating composition that present embodiment relates to, by weight percentage, comprises the following components:

[0024] Silicone modified polyester resin: 30%; filler: 20%;

[0025] Silicone coupling agent: 1%; Phthalate: 0.5%;

[0026] Xylene solvent: 48.5%.

[0027] The following is a further description of the above components:

[0028] Silicone-modified polyester resin: It is prepared by polycondensation reaction of silicone resin as modifier with saturated polyester resin, and the mass ratio of the silicone resin to saturated polyester resin is: 1:0.1.

[0029] Filler: including lead glass powder, chromium trioxide and china clay, by weight percentage, lead glass powder is 15%, chromium trioxide is 2%, and china clay is 3%.

Embodiment 2

[0031] The coating composition that present embodiment relates to, by weight percentage, comprises the following components:

[0032] Silicone modified polyester resin: 50%; filler: 46%;

[0033] Silicone coupling agent: 2%; Phthalate: 1%;

[0034] Xylene solvent: 1%.

[0035] The following is a further description of the above components:

[0036] Silicone-modified polyester resin: It is prepared by polycondensation reaction of silicone resin as modifier with saturated polyester resin, and the mass ratio of the silicone resin to saturated polyester resin is 1:0.4.

[0037] Filler: including boron glass powder, chromium oxide, china clay, aluminum powder and talcum powder, by weight percentage, boron glass powder is 30%, chromium oxide is 3%, china clay is 4%, aluminum powder is 8% , Talc powder is 1%.

Embodiment 3

[0039] The coating composition that present embodiment relates to, by weight percentage, comprises the following components:

[0040] Silicone modified polyester resin: 45%; filler: 46%;

[0041] Silicone coupling agent: 1.5%; Phthalate: 0.5%;

[0042] Xylene solvent: 7%.

[0043] The following is a further description of the above components:

[0044] Silicone-modified polyester resin: It is prepared by polycondensation reaction of silicone resin as modifier with saturated polyester resin, and the mass ratio of the silicone resin to saturated polyester resin is 1:0.3.

[0045] Filler: including phosphate glass powder, chromium oxide, china clay, aluminum powder and talcum powder, by weight percentage, phosphate glass powder is 29%, chromium oxide is 2%, china clay is 3%, aluminum powder is 10%, talcum powder is 2%.

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Abstract

The invention discloses a coating composition for a weather-resistant steel plate. The coating composition is prepared from the following components in percentage by weight: 30-50% of organosilicone modified polyester resin, 20-46% of filler, 1-2% of a siloxane coupling agent, 0.5-1% of phthalic ester and 1-48.5% of a xylene solvent; the coating composition is prepared from organosilicone modified polyester resin which is use as a base material of the coating composition and other auxiliaries. In actual use, as the organosilicone modified polyester resin has a relatively excellent high-temperature resisting performance, the formed coating composition further has good properties, can be sprayed on metal surfaces such as iron materials, aluminum products and stainless steel, and can be widely applied to heat-resisting materials, such as a petroleum refining furnace, an aluminum refining furnace, an engine exhaust system and an engine silencer, which are in a high-temperature working condition for a long time.

Description

technical field [0001] The invention belongs to the coating field of metal materials, in particular to a coating composition for weather-resistant steel plates. Background technique [0002] The coating on the metal can not only protect and beautify the appearance of the metal, such as anti-rust and coloring, but sometimes, the coating can also be used to achieve some special functions, such as improving lubrication and deep drawing performance. In the actual application process, the effect of the coating is closely related to the coating. Taking heat-resistant coatings as an example, heat-resistant coatings mean that the coating film can be maintained at high temperature (generally above 150°C) for a long time without cracking, with little yellowing and falling off, and can maintain appropriate physical properties and protective functions. , the existing patent document CN1583912 (coil primer coating and its preparation method, 2005.02.23) discloses a professional coating ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/00C09D7/12
CPCC09D167/00C08K3/08C08K3/22C08K3/34C08K3/40C08K5/10C08K5/541C08K13/02C08K2003/0812C08K2003/2251C09D7/61C09D7/63
Inventor 张一帆
Owner CHENGDU JINHUI TECH
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