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Preparation method of polyurethane waterproof paint

A polyurethane waterproofing and coating technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve problems such as poor fluidity, and achieve the effects of enhancing fluidity, improving space, and enhancing mechanical strength

Inactive Publication Date: 2018-04-13
CHANGSHA QIUDIANBING INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a preparation method of polyurethane waterproof coating, which is used to solve the problem of poor fluidity of the existing one-component polyurethane waterproof coating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A preparation method of polyurethane waterproof coating, comprising the following steps:

[0023] S1. In parts by weight, dehydrate 17.8 parts of polyoxypropylene diol and 1.54 parts of polyoxypropylene tetraol at a temperature of 114°C and a pressure of 0.09MPa and cool it down to 68°C with 20 parts of diphenyl Methane diisocyanate was mixed, the temperature was raised to 77°C for 4.5 hours, and the reaction process was kept stirring to obtain a prepolymer;

[0024] S2. In parts by weight, add 2 parts of polyoxyethylene cetyl ether, 2 parts of calcium hydroxide, 0.8 part of calcium oxide, 30 parts of talcum powder and 10 parts of calcium carbonate into a ball mill and mill for 50 minutes at a temperature of 98 ℃, then lower the temperature to 40 ℃, then add 0.6 parts of defoamer, 15 parts of methyl ethyl ketone and 0.6 parts of dioctyl phthalate and ball mill for 30 minutes to obtain component A;

[0025] S3. In parts by weight, 2.5 parts of polyurethane acrylic resin...

Embodiment 2

[0029] A preparation method of polyurethane waterproof coating, comprising the following steps:

[0030] S1. In terms of parts by weight, dehydrate 15.04 parts of polyoxypropylene diol and 1.9 parts of polyoxypropylene tetraol at a temperature of 112°C and a pressure of 0.09MPa and cool it down to 69°C with 20 parts of diphenyl Methane diisocyanate was mixed, the temperature was raised to 76°C for 4.5 hours, and the reaction process was kept stirring to obtain a prepolymer;

[0031] S2. In parts by weight, add 2.4 parts of polyoxyethylene monostearate, 1 part of calcium hydroxide, 0.6 part of calcium oxide, 30 parts of talcum powder and 11 parts of calcium carbonate into a ball mill and mill for 45 minutes at a temperature of 90 ℃, then lower the temperature to 50 ℃, then add 0.5 parts of defoamer, 12 parts of methyl ethyl ketone and 0.8 parts of dioctyl phthalate and ball mill for 30 minutes to obtain component A;

[0032] S3. In parts by weight, 2.1 parts of polyurethane ac...

Embodiment 3

[0036] A preparation method of polyurethane waterproof coating, comprising the following steps:

[0037] S1. In parts by weight, dehydrate 15.04 parts of polyoxypropylene diol and 2.81 parts of polyoxypropylene tetraol at a temperature of 115°C and a pressure of 0.085MPa and cool it down to 70°C with 20 parts of diphenyl Mix methane diisocyanate, raise the temperature to 78°C for 3.5 hours, keep stirring during the reaction process, and obtain a prepolymer;

[0038] S2. In parts by weight, add 2.5 parts of polyoxyethylene monooleate, 3 parts of calcium hydroxide, 0.5 part of calcium oxide, 30 parts of talcum powder and 12 parts of calcium carbonate into a ball mill and mill for 60 minutes at a temperature of 95°C , then lower the temperature to 45°C, then add 0.7 parts of defoamer, 14 parts of methyl ethyl ketone and 0.7 parts of dioctyl phthalate and ball mill for 30 minutes to obtain component A;

[0039] S3. In parts by weight, 1.7 parts of polyurethane acrylic resin, 18 p...

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PUM

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Abstract

The invention discloses a preparation method of polyurethane waterproof paint. The preparation method comprises the following steps: S1, dehydrating and cooling 15.04-17.8 parts by weight of polypropylene oxide glycol and 1.54-2.81 parts by weight of propylene oxide to 68-70 DEG C, then mixing with 20 parts by weight of diphenylmethane diisocyanate, raising the temperature to 76-78 DEG C, reactingfor 3.5-4.5 hours, keeping stirring in the reaction process to obtain a prepolymer; adding a surfactant and a solid filler into a ball mill, conducting ball milling for 45-60 minutes, keeping the ball milling temperature at 90-98 DEG C, then cooling to 40-50 DEG C, adding 0.5-0.7 part by weight of a defoamer, 12-15 parts by weight of methyl ethyl ketone and 0.6-0.8 part by weight of dioctyl phthalate, conducting ball milling for 30 minutes to obtain a component A; and sequentially adding 1.7-2.5 parts by weight of polyurethane acrylic resin, 17-19 parts by weight of the component A, 0.8-1.3 parts by weight of o-phenylenediamine, 0.021-0.023 part by weight of di-n-butyltin dilaurate and 0.6-1.1 parts by weight of dibutyl phthalate into 20-24 parts by weight of a prepolymer, and stirring evenly at the temperature of 52-55 DEG C to obtain the waterproof paint. The preparation method solves the problem of poor mobility of the existing single-component polyurethane waterproof paint.

Description

technical field [0001] The invention relates to a preparation method of polyurethane waterproof coating. Background technique [0002] Due to its excellent product performance and processing diversity, polyurethane waterproof coatings have become one of the fastest-growing varieties in the global coatings industry in the past ten years. The average annual growth rate of polyurethane in foreign countries has reached twice the average growth rate of the coatings industry. With its superior physical and chemical properties, polyurethane waterproof coatings have been widely recognized and applied in the waterproof industry. [0003] Polyurethane waterproof coatings are further divided into two-component polyurethane waterproof coatings and one-component polyurethane waterproof coatings. The two-component polyurethane waterproof coating is composed of two components A and B. When using, the two components must be weighed and matched in strict accordance with the prescribed ratio...

Claims

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Application Information

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IPC IPC(8): C09D175/08C09D175/14C09D7/61C09D7/63C08G18/48
CPCC09D175/08C08G18/4812C08K2003/2206C08K2003/265C08L75/14C08K13/02C08K3/22C08K3/34C08K3/26C08K5/12
Inventor 卯志华
Owner CHANGSHA QIUDIANBING INFORMATION TECH CO LTD
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