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2 673 957

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(51)

IPC

F16L58/10(2006-01-01)

(21) (22)

Application

2017112684, 2017-04-13

(24)

Start date

2017-04-13

(22)

Actual filing date

2017-04-13

(45)

Published

2018-12-03

(72)

Inventor

Sharonova Lyudmila MikhajlovnaStadnik Tatyana AnatolevnaSharonov Dmitrij Anatolevich

(73)

Holder

Obshchestvo S Ogranichennoj Otvetstvennostyu Nauchno-Proizvodstvennaya Firma

METHOD OF COATINGS OF INTERNAL SURFACE OF PIPELINE (OPTIONS) Russian patent published in 2018 - IPC F16L58/10

Abstract RU 2673957 C2

FIELD: construction.

SUBSTANCE: invention is intended to repair pipelines partially destroyed during operation or to protect them from the effects of corrosive media, mechanical damage, corrosion. Method includes two coaxially arranged tubular film shells based on a thermoplastic polymer material. One of them – external polyethylene – is adjacent to the internal surface of the pipeline, and the other is separated from it by coaxial main and additional reinforcing layers, impregnated with hardened polyester binder, thickened with aerosil. Reinforcing layers impregnated with the polyester binder additionally contain polyoxyacid amides, in the following ratio of components in wt. including: polyester resin 100; aerosil 3–5; polyoxyacid amide 0.3–1.5; curing initiator 4.0. In another embodiment of the method, a substituted urea is used as a thickener, in the following ratio of components in wt. including: polyester resin 100; substituted urea 0.1–1; curing initiator 4.0.

EFFECT: technical result is to improve the quality of the coating and increase its service life.

5 cl

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RU 2 673 957 C2

Authors

Sharonova Lyudmila Mikhajlovna

Stadnik Tatyana Anatolevna

Sharonov Dmitrij Anatolevich

Dates

2018-12-03—Published

2017-04-13—Filed