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Moisture-curing polyurethane epoxy coal-tar bitumastic

A technology of epoxy coal tar and anti-corrosion coatings, which is applied in the direction of polyurea/polyurethane coatings, anti-corrosion coatings, asphalt coatings, etc. It can solve the problems of high labor intensity, short life of moisture-permeable coatings, time-consuming and labor-intensive problems, and achieve fast progress , uniform thickness and low cost

Inactive Publication Date: 2010-06-30
孙锡宁
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the life of the moisture-permeable coating is not long
Moreover, when applying the coating, it is necessary to remove the rust first, which is time-consuming and labor-intensive, and the labor intensity is high; in the environment of -20°C, the coating cannot be carried out.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. Preparation of component A: In parts by weight, 38.59 parts of polymethylene polyphenyl isocyanate, 11.92 parts of polyether 330, 2.85 parts of polyether 635, 8.83 parts of dioctyl ester, 3.56 parts of epoxy resin, 0.0025 parts phosphoric acid, 35.68 parts solvent S1000 # , in the reactor at 81-86°C, keep warm for two hours, then cool down to 40°C;

[0025] 2. Preparation of component B: in parts by weight, take 63.98 parts of coal tar pitch, 9.28 parts of cyclohexanone, 10.9 parts of toluene, and 7.41 parts of solvent S1000 # , in the reactor at 115-120°C, keep warm for two hours, then cool down to 40°C.

[0026] 3. Blend the prepared A and B components at a ratio of 1:1, stir, disperse, and stand still for 3 to 5 minutes.

[0027] The coating of this embodiment can be used to coat a coating with a thickness of less than 110 μm, or a paint film of 20, 25, or 30 μm.

Embodiment 2

[0029] 1. Preparation of component A: In parts by weight, 37.91 parts of polymethylene polyphenyl isocyanate, 11.52 parts of polyether 330, 2.72 parts of polyether 635, 8.43 parts of dioctyl ester, 3.35 parts of epoxy resin, 0.0022 parts phosphoric acid, 33.7 parts solvent S1000 # , in the reactor at 81-86°C, keep warm for two hours, then cool down to 40°C;

[0030] 2. Preparation of component B: in parts by weight, 62.5 parts of coal tar pitch, 9.02 parts of cyclohexanone, 10.1 parts of toluene, and 7.3 parts of solvent S1000 # , 50 parts of talcum powder, through the reaction kettle 115 ~ 120 ℃, keep warm for two hours, then cool down to 40 ℃.

[0031] 3. Blend the prepared A and B components at a ratio of 1:1.4, stir, disperse, and stand still for 3 to 5 minutes.

[0032] The coating in this embodiment can be used for coating a coating with a thickness of 130-240 μm. Due to the addition of talc in component B, the coating has anti-corrosion properties.

Embodiment 3

[0034] 1. Preparation of component A: In parts by weight, take 39.62 parts of polymethylene polyphenyl isocyanate, 12.11 parts of polyether 3030, 2.96 parts of polyether 450, 8.96 parts of dibutyl fat, 3.74 parts of epoxy resin, 0.0026 parts of phosphoric acid, 36.8 parts of industrial xylene, in the reactor at 81-86°C, keep warm for two hours, then cool down to 40°C;

[0035] 2. Preparation of Component B: In parts by weight, 65.2 parts of coal tar pitch, 9.36 parts of cyclohexanone, 11.05 parts of toluene, 7.48 parts of industrial xylene, 50 parts of quartz powder (with a particle size less than 800 mesh), and reacted 115-120°C in the kettle, keep warm for two hours, then cool down to 40°C.

[0036] 3. Blend the prepared A and B components at a ratio of 1:1.6, stir, disperse evenly, and stand still for 3 to 5 minutes.

[0037] The coating of this embodiment can be used for coating a coating with a thickness greater than 300 μm. Due to the addition of quartz powder in compo...

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Abstract

The invention relates to a moisture-curing polyurethane epoxy coal-tar bitumastic. The invention adopts a technical scheme that: the bitumastic is formed by a component A and a component B in a weight ratio of 1:1-1:2; and the preparation method comprises the following steps of: placing 37 to 40 parts of polymethylene polyphenyl isocyanate, 11 to 13 parts of polyether 330 or 3,030, 2 to 3 parts of polyether 635 or 450, 8 to 9 parts of DOP or DBP, 3 to 4 parts of epoxy resin, 0.002 to 0.003 part of phosphoric acid and 33 to 37 parts of solvent No.S10,000 or industrial xylene in a reaction kettle at the temperature of between 81 and 86 DEG C, preserving the heat for 2 hours, and cooling the raw materials to obtain the component A; and placing 62 to 66 parts of coal-tar, 9 to 10 parts of cyclohexanone, 10 to 11.5 parts of toluene, and 7 to 8 parts of solvent No.S1,000or industrial xylene in the reaction kettle at the temperature of between 115 and 120 DEG C, preserving the heat for 2 hours, and cooling the raw materials to obtain the component B. The coating applied by the bitumastic is waterproof and long in life time and can further protect equipment and pipes.

Description

technical field [0001] The invention belongs to the field of coating compositions, and in particular relates to a moisture-proof polyurethane epoxy coal tar pitch anticorrosion coating. Background technique [0002] Anti-corrosion of buried gas, tap water, sewage, sea water and oil pipelines; anti-corrosion of inner and outer walls of oil storage tanks and gas tanks; Anti-corrosion coating is required. At present, oil and resin liquid coatings and solid powder coatings are mostly used, such as alkyd paint and nitro paint for domestic steel pipe rust prevention. The coating contains moisture and changes in temperature, which is prone to foaming, wrinkling, cracking and peeling off. Therefore, the life of the moisture-permeable coating is not long. Moreover, when applying the coating, it is necessary to remove the rust first, which is time-consuming, labor-intensive, and labor-intensive; in the environment of -20°C, the coating cannot be carried out. Contents of the inven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D195/00C09D175/04C09D5/08
Inventor 孙锡宁
Owner 孙锡宁
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