Preparation method of high temperature resistant pipeline anticorrosion epoxy powder coating

Abstract

The invention relates to a preparation method of high-temperature-resistant pipeline anti-corrosion epoxy powder paint. The high-temperature-resistant pipeline anti-corrosion epoxy powder paint is prepared from the following ingredients in parts by mass: 200 parts of oxazolidinone-ring-containing novolac epoxy resin, 110 to 140 parts of filling materials, 4 to 8 parts of amine curing agents, 30 to50 parts of polyphenolic curing agents, 0.3 to 0.8 part of accelerants, 3 to 6 parts of flatting agents, 0.5 to 1.5 parts of coupling agents and 3 to 10 parts of toughening agents. The novolac epoxyresin and the oxazolidinone-ring-containing novolac epoxy resin are combined; the advantages of the novolac epoxy resin and the oxazolidinone-ring-containing novolac epoxy resin are sufficiently utilized, so that the performance of the obtained coating is more excellent; after the coating curing, the vitrification temperature reaches 180 DEG C or higher; the adaptation to a more severe environmentis realized; the long-time stability of the performance at high temperature of 150 DEG C can be maintained.

Description

technical field

[0001] The invention relates to the technical field of anti-corrosion powder coatings, and more particularly relates to the preparation of high-temperature-resistant anti-corrosion epoxy powder coatings for steel pipelines such as oil, gas and water conveying high temperature. Background technique

[0002] In the late 1990s, my country began to use fusion-bonded epoxy powder coatings on pipelines for natural gas, crude oil and refined oil. With the continuous advancement of industrial technology, the market's quality requirements for powder coatings are also getting higher and higher. Both the chemical resistance of the coating and the impact resistance of the coating are constantly improving, especially when the coating is exposed to high temperatures. Stable performance is particularly important. For example, pipelines for transporting crude oil need to operate at a temperature higher than 130°C for a long time, which requires the anti-corrosion coating of...

Examples

preparation example Construction

[0060] The preparation method of high temperature resistant anticorrosion epoxy powder coating of the present invention comprises the following steps:

[0061] First, accurately weigh the required raw materials according to the requirements of the formula, add them to a high-speed mixer with crushing and mix for 5-7 minutes;

[0062] Then, put the mixed raw materials into the twin-screw extrusion equipment, control the temperature at 110-130°C, and cool after extrusion for preliminary crushing;

[0063] Finally, put the extruded and crushed material into a pulverizer to pulverize, and then use a 100-mesh sieve to sieve to obtain the product (the mesh number of the sieve can be adjusted according to the different needs of users).

[0064] 3. The preparation of high temperature resistant and anti-corrosion epoxy powder coating can also be completed according to the usual method:

[0065] The first step is to treat the surface of the substrate so that the surface reaches the Sa2...

Embodiment example 1～3

[0075] For preparing the formula and preparation method that contain oxazolidone ring epoxy resin, concrete formula is listed in table 1

Embodiment example 1

[0076] Implementation Case 1 (No. D116-1)

[0077] First, accurately weigh 350 parts of novolac epoxy resin (Nanya Electronic Materials Co., Ltd., NPPN638S), add it into a three-necked reaction bottle, and raise the temperature to 120°C; then add the catalyst 1,8-diazabicycloundedec-7- Add 0.30 parts of ethylene (DBU), and slowly add 40 parts of toluene diisocyanate (TDI) into the reaction kettle in three times while stirring. resin.

technical field

[0001] The invention relates to the technical field of anti-corrosion powder coatings, and more particularly relates to the preparation of high-temperature-resistant anti-corrosion epoxy powder coatings for steel pipelines such as oil, gas and water conveying high temperature. Background technique

[0002] In the late 1990s, my country began to use fusion-bonded epoxy powder coatings on pipelines for natural gas, crude oil and refined oil. With the continuous advancement of industrial technology, the market's quality requirements for powder coatings are also getting higher and higher. Both the chemical resistance of the coating and the impact resistance of the coating are constantly improving, especially when the coating is exposed to high temperatures. Stable performance is particularly important. For example, pipelines for transporting crude oil need to operate at a temperature higher than 130°C for a long time, which requires the anti-corrosion coating of...

Examples

preparation example Construction

[0060] The preparation method of high temperature resistant anticorrosion epoxy powder coating of the present invention comprises the following steps:

[0061] First, accurately weigh the required raw materials according to the requirements of the formula, add them to a high-speed mixer with crushing and mix for 5-7 minutes;

[0062] Then, put the mixed raw materials into the twin-screw extrusion equipment, control the temperature at 110-130°C, and cool after extrusion for preliminary crushing;

[0063] Finally, put the extruded and crushed material into a pulverizer to pulverize, and then use a 100-mesh sieve to sieve to obtain the product (the mesh number of the sieve can be adjusted according to the different needs of users).

[0064] 3. The preparation of high temperature resistant and anti-corrosion epoxy powder coating can also be completed according to the usual method:

[0065] The first step is to treat the surface of the substrate so that the surface reaches the Sa2...

Embodiment example 1～3

[0075] For preparing the formula and preparation method that contain oxazolidone ring epoxy resin, concrete formula is listed in table 1

Embodiment example 1

[0076] Implementation Case 1 (No. D116-1)

[0077] First, accurately weigh 350 parts of novolac epoxy resin (Nanya Electronic Materials Co., Ltd., NPPN638S), add it into a three-necked reaction bottle, and raise the temperature to 120°C; then add the catalyst 1,8-diazabicycloundedec-7- Add 0.30 parts of ethylene (DBU), and slowly add 40 parts of toluene diisocyanate (TDI) into the reaction kettle in three times while stirring. resin.

Images