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Coating for drinking water tube/container liners, preparation method and construction method

A construction method and technology for drinking water pipes, which are applied in the fields of coating and preparation and construction of drinking water pipe/container lining, can solve problems such as toxicity and low construction efficiency, and achieve excellent adhesion, smooth coating surface, and energy saving in transportation. Effect

Inactive Publication Date: 2010-02-03
青岛佳联化工新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a coating for drinking water pipe / container lining and its preparation method and construction method, which can solve the problems of toxicity and low construction efficiency in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Component A consists of about 22 parts of 2,4'-diphenylmethane diisocyanate and 50 parts of 4,4'-diphenylmethane diisocyanate and 28 parts of polystyrene with a molecular weight of 1000 and a functionality of 2. The prepolymer prepared by propylene oxide ether diol (TDiol-1000, Tianjin Petrochemical No. 3 Plant). The NCO content of the prepolymer was 22±0.2%. The viscosity at 25°C is about 500cps.

[0049] The R component is composed of polypropylene oxide ether diol TDiol-1000 (Tianjin Petrochemical No. 3 Plant), polyether polyol TMN450 (Tianjin No. 3 Petrochemical Plant), DETDA amino resin, pigment and additive mixture. Accurately weigh the various raw materials in the R component according to the formula, add them into the paint tank, and stir at high speed for 30 minutes with high-speed shearing and dispersing equipment.

[0050] The isocyanate index of this system was 1.02. The specific ratio is shown in the table below.

[0051] R component

Propor...

Embodiment 2

[0056] A consists of about 28 parts of 2,4'-diphenylmethane diisocyanate and 40 parts of 4,4'-diphenylmethane diisocyanate and 32 parts of polypropylene oxide with a molecular weight of 1000 and a functionality of 2 Ether diol (TDiol-1000), the prepared prepolymer. The NCO content of the prepolymer was 20±0.2%. The viscosity at 25°C is about 650cps. The R component is composed of polypropylene oxide ether diol (TDiol-2000, Tianjin Petrochemical No. 3 Plant), polypropylene oxide ether triol (TMN450, Tianjin No. 3 Petrochemical Plant), DETDA amino resin, pigment and additive mixture. Accurately weigh the various raw materials in the R component according to the formula, add them into the paint tank, and stir at high speed for 30 minutes with high-speed shearing and dispersing equipment.

[0057] The isocyanate index of this system was 1.07. The specific ratio is shown in the table below.

[0058] R component

Proportion

TDiol-2000

63.5

TMN450...

Embodiment 3

[0062] A consists of about 20 parts of 2,4'-diphenylmethane diisocyanate and 30 parts of 4,4'-diphenylmethane diisocyanate and 13 parts of polypropylene oxide with a molecular weight of 1000 and a functionality of 2 A prepolymer prepared from ether diol (TDiol-1000) and 20 parts of polypropylene oxide ether (TDiol-2000) with a molecular weight of 2000 and a functionality of 2. The NCO content of the prepolymer was 18±0.2%. The viscosity at 25°C is about 530cps. R component consists of polypropylene oxide ether diol (TDiol-1000, Tianjin Petrochemical No. Auxiliary mixture composition. Accurately weigh the various raw materials in the R component according to the formula, add them into the paint tank, and stir at high speed for 30 minutes with high-speed shearing and dispersing equipment.

[0063] The isocyanate index of this system was 1.0. The specific ratio is shown in the table below.

[0064] R component

Proportion

TDiol-1000

68.0

TONE...

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Abstract

The invention provides a coating for drinking water tube / container liners, a preparation method and a construction method, which can solve the problems in the prior art, such as toxicity and low construction efficiency, etc. The coating of the invention contains no solvent, and all the pigments and auxiliaries pass the FDA approval. Through detection, the products pass the BS6920 standard absolutely and can be safely applied to the drinking water duct liners. Meanwhile, the coating of the invention features rapid curing rate, convenient and fast construction and thick one-time forming film, and is extremely suitable for large-scale drinking water duct construction.

Description

technical field [0001] The invention relates to a coating for drinking water containers, drinking water pipelines or linings of drinking water storage tanks, in particular to a solvent-free polyurethane rigid coating for repairing drinking water pipelines, storage tank linings or drinking water pipelines and its preparation methods and construction methods. Background technique [0002] With the improvement of living standards and the enhancement of health awareness, people have higher and higher requirements for drinking water pipelines that directly affect human health. With the application of new pipes, there are many varieties of pipes that can be used for drinking water. From the material of the pipe, there are mainly metal pipes and non-metal pipes. Commonly used pipes for large-diameter pipes include steel pipes and ductile iron pipes, and thin-walled stainless steel and polyethylene pipes for small and medium-diameter pipes. Steel pipes and ductile iron pipes are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08B05D7/26
Inventor 刘培礼胡松霞王宝柱亓峰
Owner 青岛佳联化工新材料有限公司
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