COMPOSITE POLYMER MATERIAL FOR FUNCTIONAL COATINGS AND METHOD OF DEPOSITING IT Russian patent published in 2008 - IPC C09D5/03 C09D177/02 

FIELD: polymers.

SUBSTANCE: invention pertains to the technology of polymer functional materials and can be used in machine building for coating components of machines, mechanisms and transport systems, and primarily, flange joints of transport systems. The composite polymer material contains a polymer binding substance, polymer component and a dispersion additive. The polymer binding substance is polyamide 6. The polymer component is a mixture of thermoplastic, chosen from HDPE, polypropylene, PTFE with 0.75-10.5 wt % content of thermoplastic, chosen from "СЭВА", "ТПУ", "ДСТ", polyamide 49.7-50 wt %. The dispersion additive is natural silicate with content of 0.1-1.0 wt %. The functional coating method consists of two stages. At the first stage a layer with given thickness is deposited by dipping a hot base metal at 270-300°C into a pseudoliquid layer made from a composition based on polyamide 6, modified by thermoplastic, thermoplastic elastomer and natural silicate. At the second stage on the formed first layer, which is molten and at temperature of 240-270°C, a second layer of coating is deposited, by dipping in a pseudoliquid layer based on thermoplastic elastomer, modified by polyamide 6, thermoplastic, natural silicate, and then the formed coating is cooled in air.

EFFECT: invention allows for making a composite polymer coating with gradient of efficiency record on thickness suitable for providing for hermeticity and electrical insulation properties of flange joints of pipe lines.

2 cl, 4 ex, 2 tbl