CN105238268A - Paint for preventing corrosion of buried pipelines and preparation method for paint - Google Patents

Abstract

The present invention discloses paint for preventing corrosion of buried pipelines. The paint comprises the following components in percentage by mass: 30-40% of epoxy resin; 440-50% of a modified asphalt liquid; 5-10% of 70#paraffin; 10% of talcum powder; 1%-5% of auxiliaries; and 25-30% of a curing agent. The paint disclosed by the present invention can be applied by a spraying process, a brushing process and a roll coating process; the paint has excellent adhesiveness, chemical corrosion resistance, abrasion resistance, fast drying property, water permeability resistance and flame resistance. The present invention also discloses a preparation method for the paint for preventing corrosion of buried pipelines.

Description

A kind of for buried pipeline rot-resistant coating and preparation method thereof

Technical field

The invention belongs to paint field, be specifically related to a kind of for buried pipeline rot-resistant coating and preparation method thereof.

Background technology

That builds along with National modern progressively gos deep into, and underground metalliferous builds and increases sharply, as gas pipe line, the southern oil pipeline, cable, foggara blow-off pipe etc. adjusted of north oil of transfering natural gas from the west to the east.Due to the corrosion of soil, what cause oil, gas, water oozes dew, causes damage or accident, and therefore, soil erosion researching is significant.Soil corrosion is the corrosion that metal occurs in soil.Soil is the special solid electrolyte with capillary porosity.The cathodic process mainly oxygen de-polarization reactions of soil corrosion, because oxygen will arrive negative electrode through the micropore ionogen of solid, process more complicated, carry out slower, and the structure of soil and the flowing of humidity to oxygen have a great impact, the corrosion factor of impact mainly contains bacterium in the electroconductibility of soil, ventilation property (porosity), saltiness, soil, stray current, current existing buried metal anticorrosion main based on epoxide coal bituminous, but there is the problem of pitch contaminated soil in common coal-tar pitch simultaneously.

Summary of the invention

The object of the invention is to overcome defect of the prior art, provide a kind of buried pipeline rot-resistant coating, the present invention is achieved by the following technical programs.

A kind of for buried pipeline rot-resistant coating, its composition is as follows by mass percentage: epoxy resin 30-40%; Modifying asphalt liquid 40-50%; 70# paraffin 5-10%; Talcum powder 10%; Auxiliary agent 1%-5%; Solidifying agent 25-30%.

Described talcum powder is 1250 order talcum powder; Described modifying asphalt is environmentally-friendly asphalt; Described solidifying agent is addition polyamide.

For a preparation method for buried pipeline rot-resistant coating, comprise step:

(1) be 30-40% epoxy resin, 1%-5% auxiliary agent, 5-10%70# paraffin mix and blend by weight part, stirring velocity is 300 turns/min, stirs 30 minutes, obtains the mixture of homogeneous transparent;

(2) under whipped state, add the talcum powder that weight part is 10% in mixture, adjusting rotary speed is 600 turns/min, master cylinder temperature≤45 DEG C, and churning time is 30 minutes;

(3) adding weight part is 40-50% modifying asphalt liquid, and adjusting rotary speed is 800 turns/min, stirs one hour, inspection viscosimetric≤90s, Gu containing amount≤70%, and obtained finished product.

Coating of the present invention can adopt spraying coating process, brushes, and roll coating process is constructed, and adopts addition polyamide as solidifying agent simultaneously, makes coating of the present invention have excellent binding property, chemical resistance, wear resistance, quick-drying, anti-water-permeable, flame retardant resistance etc.Long-term preservative effect can be reached, select 70# paraffin to make material produce toughness simultaneously, the present invention adopt nontoxic pitch then can both take into account not only can reach antiseptic property but also can soil protection not by secondary pollution.

Embodiment

Below by way of specific embodiment, the present invention is further detailed explanation.

Embodiment one:

First extracting epoxy resin 40%, modifying asphalt liquid 40%, 70# paraffin 5%, auxiliary agent 5%, talcum powder 10%, by mass percentage.

By epoxy resin, 70# paraffin, auxiliary agent, put in dispersion cylinder, turn on agitator slowly stirs, stirring velocity is 300 turns/min, stir after 30 minutes, after estimating its homogeneous transparent, talcum powder will add under whipped state again, adjusting rotary speed is 600 turns/min, and churning time is 30 minutes, controls dispersion cylinder temperature≤45 DEG C (can adopt jacketed type device if desired), finally add modifying asphalt liquid, stir while adding equally, adjusting rotary speed is 800 turns/min, stirs and examines viscosimetric≤90s after one hour, Gu Han Liang≤70%, obtains finished product.

Result of use: above-mentioned formula making sheet is made 5 pieces of test plate (panel)s respectively, wherein one piece is done measuring mechanical property, and all the other do chemical property test, thickness 80 microns, and after paint film maintains 7 days, to the test of its Progressive symmetric erythrokeratodermia energy limit, result is as follows:

The performance data of the coating obtained by table 1 embodiment 1

Embodiment two:

First modified resin 25% is got, asphaltic liquid 50%,, 52# paraffin 8%, auxiliary agent 2%, talcum powder 15%, by mass percentage.

By the chlorinated rubber of 35%, 52# paraffin, auxiliary agent, put in dispersion cylinder, turn on agitator slowly stirs, stirring velocity is 300 turns/min, stir after 30 minutes, after estimating its homogeneous transparent, talcum powder will add under whipped state again, adjusting rotary speed is 600 turns/min, and churning time is 30 minutes, controls dispersion cylinder temperature≤45 DEG C (can adopt jacketed type device if desired), finally add 50% asphaltic liquid, stir while adding equally, adjusting rotary speed is 800 turns/min, stirs and examines viscosimetric≤90s after 1 hour, Gu Han Liang≤70%, obtains finished product.

Result of use: above-mentioned formula making sheet is made 5 pieces of test plate (panel)s respectively, wherein one piece is done measuring mechanical property, and all the other do chemical property test, thickness 80 microns, and after paint film maintains 7 days, carry out performance test to it, result is as follows:

The performance data of coating obtained by table 2 embodiment 2

Embodiment three:

First modified resin 30% is got, asphaltic liquid 50%,, 52# paraffin 5%, auxiliary agent 2%, talcum powder 13%, by mass percentage.

By the chlorinated rubber of 35%, 52# paraffin, auxiliary agent, put in dispersion cylinder, turn on agitator slowly stirs, stirring velocity is 300 turns/min, stir after 30 minutes, after estimating its homogeneous transparent, talcum powder will add under whipped state again, adjusting rotary speed is 600 turns/min, and churning time is 30 minutes, controls dispersion cylinder temperature≤45 DEG C (can adopt jacketed type device if desired), finally add 50% asphaltic liquid, stir while adding equally, adjusting rotary speed is 800 turns/min, stirs and examines viscosimetric≤90s after one hour, Gu Han Liang≤70%, obtains finished product.

Result of use: above-mentioned formula making sheet is made 5 pieces of test plate (panel)s respectively, wherein one piece is done measuring mechanical property, and all the other do chemical property test, thickness 80 microns, and after paint film maintains 7 days, carry out performance test to it, result is as follows:

A kind of utilization for buried pipeline rot-resistant coating of the present invention, can make original function greatly strengthen, decrease the utilization again of unnecessary impregnating material, and the comprehensive cost reducing antiseptic project is easy to use.

Claims (4)

1. for a buried pipeline rot-resistant coating, it is characterized in that: its composition is as follows by mass percentage: epoxy resin 30-40%; Modifying asphalt liquid 40-50%; 70# paraffin 5-10%; Talcum powder 10%; Auxiliary agent 1%-5%; Solidifying agent 25-30%.

2. as claimed in claim 1 for buried pipeline rot-resistant coating, it is characterized in that: described talcum powder is 1250 order talcum powder.

3. as claimed in claim 1 for buried pipeline rot-resistant coating, it is characterized in that: described solidifying agent is addition polyamide.

4., for a preparation method for buried pipeline rot-resistant coating, it is characterized in that comprising step:

(1) be 30-40% epoxy resin, 1%-5% auxiliary agent, 5-10%70# paraffin mix and blend by weight part, stirring velocity is 300 turns/min, stirs 30 minutes, obtains the mixture of homogeneous transparent;

(2) under whipped state, add the talcum powder that weight part is 10% in mixture, adjusting rotary speed is 600 turns/min, master cylinder temperature≤45 DEG C, and churning time is 30 minutes;

(3) adding weight part is 40-50% modifying asphalt liquid, and adjusting rotary speed is 800 turns/min, stirs 1 hour, inspection viscosimetric≤90s, Gu containing amount≤70%, and obtained finished product.