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POWERSIL® 577 PLUS

POWERSIL® 577 PLUS is a curable one-component silicon-in-water-emulsion.

Spray application forms a wet layer that dries and cures to a high voltage insulator coating with excellent electrical properties.



特性

  • Good resistance to weathering

POWERSIL® 577 PLUS的特殊性能

  • 不含溶剂

Coating Application

POWERSIL® 577 PLUS is an emulsion. Proper stirring is recommended before the material is used. The material appears creamy and to certain extends nonyielding when filled into a feeding reservoir of the spraying equipment. The material shows a strong decrease of the viscosity under shear. That is why an addition of water to adjust the viscosity and the spraying behavior should be done carefully and very small doses.

 

Surface pretreatment

 

The insulator surface to be coated should be clean and free of dust and grease. For cleaning the following operations are suggested:

 

  • Proper cleaning by using water and a suitable detergent might be sufficient.
  • Insulators that show an adhering pollution, such like cement, other mineral or chemical pollution layers should be cleaned by either "cob corn-" or carbon dioxide blasting.
  • Any type of grease or fatty pollution is to be removed by using a suitable solvent like benzine or turpentine.
  • Residual contaminants should be removed by thoroughly wiping.
  • Finish the cleaning just before spraying POWERSIL® 577 PLUS with Isopropanol or an equivalent alcohol.

 

Check carefully that there is no of dirt or grease left before spraying!

 

In most cases it is not necessary to apply a primer before coating.

 

POWERSIL® 577 PLUS is ideally applied by spraying. For spraying application, the airless process was found to be efficient. The following equipment settings were found to be suitable:

 

  • Flat nozzle of 0,33 mm, 20°
  • Setting of pressure output 50 - 150 bar

 

The spray gun should be moved evenly across the surface at a distance of about 30 - 50 cm. Due to the thixotropic properties of POWERSIL® 577 PLUS the coating is normally applied with one spray cycle.

 

A typical dry film thickness is 0,4 mm to 0,5 mm. Thus, the theoretical consumption is 0,8 kg to 1,0 kg of POWERSIL® 577 PLUS per square meter of insulator surface. Take losses for overspray and cleaning of the equipment into consideration.

 

Rain can damage the coating. In case of rain, please protect the job site or stop application.

 

All spraying equipment should be cleaned with water immediately after use.

 

Maintenance

 

The product contains migratable matter that is able to encapsulate contaminants and to provide a hydrophobic surface. Coated insulators may appear dirty after some time in service. Nevertheless, washing and cleaning, especially with detergents and other chemicals is not recommended.

 

Inspection

 

The water repellent appearance can be evaluated by spraying with water. IEC 62073, “Guidance on the measurement of wettability of insulator surfaces” provides further information. A partly lowering of the effect does not necessarily require immediate action. Experience shows that the remaining parts of the insulator will provide the necessary insulation ability.

 

Physical damage, such like scratching can be easily repaired by brushing of fresh coating after partly cleaning with benzine.

 

To allow an instant replacement of broken insulators it is recommendable to store a number of coated spare insulators. These should be stored in a protective covering.

储存

Minimum temperature allowed during storage and transportation: 5°C.

 

Maximum temperature allowed during storage and transportation: 30°C.

 

The 'Best use before end' date of each batch is shown on the product label.

 

Storage beyond the date specified on the label does not necessarily mean that the product is no longer usable. In this case however, the properties required for the intended use must be checked for quality assurance reasons.

销售和支持

Wacker Chemicals (China) Co.,Ltd.
Caohejing Hi-Tech Park
200233 Shanghai
中国大陆
+86  21  6130-2000 (电话)
+86 21 6130-2500  (传真)
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个产品 技术数据
Tear-growth resistance 动态粘度 Shore density A Breaking strength 断裂伸长率
POWERSIL® 567 9,0 N/mm[1] 9,0 N/mm[1] 1400 mPa·s[2] 1400 mPa·s[2] 45[4] 45[4] 3,0 N/mm²[5] 3,0 N/mm²[5] 250 %[6] 250 %[6]
POWERSIL® 577 PLUS - - 350000 mPa·s[3] 350000 mPa·s[3] - - - - - -
POWERSIL® 590 - - - - - - - - - -
说明
[1] Tear-growth resistance | ASTM D 624 B,  [2] 动态粘度 (10 s⁻¹) | 23 °C | DIN EN ISO 3219,  [3] 动态粘度 (0.1 %形变时) | DIN 54458,  [4] Shore density A | DIN ISO 48-4,  [5] Breaking strength | ISO 37 type 1,  [6] 断裂伸长率 | ISO 37 type 1 

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Wacker Chemie AG
Gisela-Stein-Strasse 1
81671 Munich
+49  89  6279-0 (Phone)

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