Water-based paint for steel tube external protection and preparation method of water-based paint

A water-based coating and external protection technology, applied in the field of coatings, can solve the problems of general gloss of the coating film, high cost, and high consumption of materials, and achieve the effect of simplifying the coating process, lowering the price and reducing the construction cost.

CN104559660AInactive Publication Date: 2015-04-29SHANGHAI HILONG PETROCHEM RES INST +3
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2015-04-29
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

The invention discloses a water-based paint for steel tube external protection. The water-based paint is prepared from the following raw material constituents in percentage by weight: 20.0-35.0% of an waterborne epoxy emulsion, 15.0-25.0% of water-based acrylic resin I, 15.0-25.0% of water-based acrylic resin II, 0.5-2.0% of propylene glycol, 2.0-5.0% of butyl cellosolve, 0.1-1.0% of a flash-rust inhibitor, 0.5-1.0% of a corrosion inhibitor, 0.5-2.0% of a salt spray resistant additive, 0.1-0.5% of a bactericide, 0.1-0.5% of a wetting agent, 0.05-0.5% of a defoaming agent, 0.1-1.0% of a thickening agent, and 21.3-27.5% of deionized water; the water-based paint is prepared from the following steps: (1) preparing the raw materials; (2) burdening and dispersing; (3) filtering and packaging. The water-based paint disclosed by the invention belongs to the varnish system; the dry film thickness of the paint is only 20-30 microns; the water-based paint is good in adhesive force, corrosion resistance and water penetration resistance; the surface gloss of the coating can be up to 90 degrees, the salt spray resistance property can be up to 300 hours above, and the outdoor weather resistance can be more than 1 year.
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Description

technical field

[0001] The invention relates to the technical field of coatings, in particular to a water-based coating suitable for protecting the outer layer of steel pipelines and a preparation method thereof. Background technique

[0002] The use of metal pipelines for the transportation of domestic and industrial resources is a common means used in urban construction and industry at this stage, such as: urban gas supply, water supply, heat supply transportation; industrial oil transportation, natural gas transportation, etc. In pipeline transportation, the protection of metal pipelines is particularly important. In the past, solvent-based coatings were mainly used to protect the outer surface of metal pipes. With the increasing impact of solvent-based coatings on the human environment and a series of incidents caused by solvent-based coatings, people's awareness of environmental protection is constantly improving, and environmental protection regulations restricting th...

Examples

Embodiment 1

[0060] (1) A method for preparing a steel pipe outer protective water-based coating, comprising the following steps:

[0061] (1) Raw material preparation

[0062] The mass percent of each raw material component is:

[0063]Water-based epoxy emulsion 35.0%, adopt the STW6140 water-based epoxy emulsion product produced by Shanghai Resin Factory, and its solid content is 50%.

[0064] Water-based acrylic resin I 15.0%, adopts the AC2403 water-based acrylic resin product produced by Oubaodi Resin Co., Ltd., and its solid content is 47%.

[0065] Water-based acrylic resin II 15.0%, adopt YG-EA670 water-based epoxy-modified acrylic resin product produced by Beijing Sunshine Huide Environmental Protection Technology Co., Ltd., and its solid content is 72%.

[0066] Propylene glycol 0.5%, using commercially available propylene glycol products.

[0067] Ethylene glycol butyl ether 5.0%, adopt the ethylene glycol butyl ether product available in the market.

[0068] Anti-flash rust...

Embodiment 2

[0090] (1) A method for preparing a steel pipe outer protective water-based coating, comprising the following steps:

[0091] (1) Raw material preparation

[0092] The mass percent of each raw material component is:

[0093] Waterborne epoxy emulsion 20.0%, (the raw material that adopts is the same as embodiment 1).

[0094] Waterborne acrylic resin I 25.0%; (the raw material that adopts is with embodiment 1).

[0095] Waterborne acrylic resin II 25.0%, (the raw material that adopts is the same as embodiment 1).

[0096] Propylene glycol 2.0%, (the raw material that adopts is with embodiment 1).

[0097] Ethylene glycol butyl ether 2.0%, (the raw material that adopts is the same as embodiment 1).

[0098] Anti-flash rust agent 1.0%, (the raw material that adopts is the same as embodiment 1).

[0099] Corrosion inhibitor 0.5%, (the raw material that adopts is the same as embodiment 1).

[0100] Salt spray resistance additive 2.0%, (the raw materials used are the same as i...

Embodiment 3

[0109] (1) A method for preparing a steel pipe outer protective water-based coating, comprising the following steps:

[0110] (1) Raw material preparation

[0111] The mass percent of each raw material component is:

[0112] Waterborne epoxy emulsion 25.0%, (the raw material that adopts is the same as embodiment 1).

[0113] Water-based acrylic resin I 20.0%, (the raw material that adopts is the same as embodiment 1).

[0114] Waterborne acrylic resin II 20.0%, (the raw material that adopts is the same as embodiment 1).

[0115] Propylene glycol 1.0%, (the raw material that adopts is with embodiment 1).

[0116] Ethylene glycol butyl ether 3.0%, (the raw material that adopts is the same as embodiment 1).

[0117] Anti-flash rust agent 0.5%, (the raw material that adopts is the same as embodiment 1).

[0118] Corrosion inhibitor 0.8%, (the raw material that adopts is the same as embodiment 1).

[0119] Salt spray resistance additive 1.0%, (the raw materials used are th...