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Epoxy powder coating for inner wall of drinking water pipeline and preparation method thereof

Active Publication Date: 2021-12-07
洛阳双瑞防腐工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, solvent-based and high-solid epoxy resin coatings are difficult to volatilize the residual solvent after drying and curing, which is easy to cause water pollution, and with the increasingly stringent environmental protection regulations, the application of solvent-based coatings is gradually restricted
Although solvent-free epoxy coatings can effectively reduce VOC emissions, their high viscosity requires high requirements for spraying equipment. At the same time, the leveling of the coating surface is poor, and it is prone to bubbles, pinholes and other disadvantages.

Method used

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  • Epoxy powder coating for inner wall of drinking water pipeline and preparation method thereof
  • Epoxy powder coating for inner wall of drinking water pipeline and preparation method thereof

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preparation example Construction

[0063] A preparation method of epoxy powder coating for inner wall of drinking water pipeline, comprising the following steps:

[0064] (1), take each component respectively according to described mass part;

[0065] (2) Pour all other components weighed in step (1) except the loosening agent into the mixer and mix for 3 to 5 minutes to obtain a premix;

[0066] (3) Extrude the premix obtained in step (2) with a twin-screw extruder and crush it into tablets to obtain fragments; wherein, the temperature in zone 1 of the twin-screw extruder is set at 110-120°C, 2 The zone temperature is set at 90-100°C.

[0067] (4), the fragments obtained in step (3) are graded and pulverized by ACM, a loosening agent is added in the pulverization process, and then sieved with a 100 mesh screen, and the finer powder sieved out is the epoxy powder coating.

Embodiment 1

[0069] The preparation method of present embodiment powder coating is:

[0070] (1), 120 parts of medium molecular weight solid epoxy resin GESR904H, 60 parts of high molecular weight solid epoxy resin GESR907, 8 parts of polyvinyl butyral, 30 parts of modified phenolic curing agent Amanda 969T02, 3 parts of hyperbranched polymer Amanda 100, 0.3 parts of dimethylimidazole, 7.2 parts of titanium dioxide R706, 0.1 parts of carbon black MA100, 50 parts of wollastonite powder, 17 parts of wet sericite powder GA-1, 1.5 parts of leveling agent GLP588, 1.5 parts of brightening agent 701. Pour 0.8 parts of benzoin into the mixer and mix for 3 minutes to obtain a premix;

[0071] (2) The premix prepared in step (1) is melted and extruded through a twin-screw extruder and crushed into tablets to obtain chips, wherein the temperature in the first zone of the extruder is 110°C, and the temperature in the second zone is 90°C ;

[0072] (3), the fragments obtained in step (2) are graded a...

Embodiment 2

[0074] The preparation method of present embodiment powder coating is as follows:

[0075] (1), 135 parts of medium molecular weight solid epoxy resin GESR904H, 40 parts of high molecular weight solid epoxy resin GESR907, 10 parts of polyvinyl butyral, 34 parts of modified phenolic curing agent Amanda 969T02, 4 parts of hyperbranched polymerization Amanda100, 0.4 parts of dimethyl imidazole, 7.2 parts of titanium dioxide R706, 0.1 parts of carbon black MA100, 70 parts of wollastonite powder, 14 parts of wet sericite powder GA-1, 2 parts of leveling agent GLP588, 2 parts of brightening agent 701, 1 part of benzoin is placed in a blender and mixed for 4 minutes to obtain a premix;

[0076] (2) The premix prepared in step (1) is melted and extruded through a twin-screw extruder and crushed into tablets to obtain fragments, wherein the temperature in zone 1 of the extruder is 115°C, and the temperature in zone 2 is 95°C ;

[0077] (3), the fragments obtained in step (2) are grad...

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Abstract

The invention discloses an epoxy powder coating for the inner wall of a drinking water pipeline and a preparation method thereof. The coating comprises: 120-150 parts of medium molecular weight solid epoxy resin; 30-60 parts of high molecular weight solid epoxy resin ; 8~16 parts of polyvinyl butyral; 30~36 parts of modified phenolic curing agent; 3~5 parts of hyperbranched polymer; 0.3~0.5 parts of dimethylimidazole; 7.2 parts of titanium dioxide; 0.1 parts of carbon black ; 50~80 parts of wollastonite powder; 10~17 parts of wet sericite powder; 1.5~2.2 parts of leveling agent; 1.5~2.2 parts of brightening agent; 0.8~1.2 parts of benzoin; The epoxy powder coating has excellent adhesion, flexibility, cathodic disbonding resistance and other properties, and also has excellent hygienic and safety performance.

Description

technical field [0001] The invention relates to the technical field of powder coatings, in particular to an epoxy powder coating for the inner wall of a drinking water pipeline and a preparation method thereof. Background technique [0002] Urban drinking water pipelines and long-distance water transmission and distribution pipelines are mostly made of steel pipes, ductile iron pipes, and plastic pipes (PE, PVC, etc.). In order to ensure the quality and efficiency of water delivery, in addition to plastic pipes, the inner walls of steel pipes and ductile iron pipes need to be protected with protective coatings for long-term protection, so as to ensure that the service life of these water delivery and distribution pipelines can reach more than 50 years. Steel pipes have superior ductility, integrity, and convenient construction operability. At the same time, they have outstanding performances such as service life, resistance, non-toxicity and harmlessness, and are moderately ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D5/03C09D7/61C09D7/65C09D5/08
CPCC08K2003/2241C08L2203/18C08L2205/025C08L2205/035C09D5/033C09D5/08C09D163/00C08L63/00C08L29/14C08L101/005C08K3/22C08K3/04C08K3/34C08K13/02
Inventor 张耿涛张延奎刘翰锋
Owner 洛阳双瑞防腐工程技术有限公司