Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

High-performance polyurethane waterproof coating and preparation method thereof

A polyurethane waterproof and high-performance technology, applied in polyurea/polyurethane coatings, wax coatings, coatings, etc., can solve the problems of easy flow, long surface dry time and hard drying time, sensitive polyurethane waterproof coatings, etc., and achieve low price Effect

Inactive Publication Date: 2020-11-03
潍坊市璇宝防水材料有限公司
View PDF8 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this patent: it is easy to flow after thick coating, and the surface drying time and hard drying time are long
The disadvantage of this patent: the prepared polyurethane waterproof coating is sensitive to the environment and not resistant to low temperature
The disadvantage of this patent: the production and use of two-component polyurethane waterproof coating is relatively complicated

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High-performance polyurethane waterproof coating and preparation method thereof
  • High-performance polyurethane waterproof coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method of a high-performance polyurethane waterproof coating comprises the following steps: a prepolymer synthesis step, an activation step, a low-temperature catalysis step, and a temperature-raising step.

[0031] In the synthesis step of the prepolymer, 18 parts by weight of polyether polyol is added into a high-shear reaction kettle, and after 10 minutes of high-shear, the reaction temperature is adjusted to 100°C, and then the high-shear reaction is carried out. Add 6 parts by weight of isocyanate and 0.1 part by weight of silicone defoamer by shearing, continue high-shearing and heat-retaining reaction at 70°C for 1 hour to obtain the NCO-based prepolymer, turn off the high-shearing, and NCO The base prepolymer was cooled to 35°C and then stored in a high-shear reactor for later use.

[0032] The polyether polyol, chroma: ≤50, hydroxyl value: 107-117, moisture: ≤0.05, acid value (mgKOH / g): ≤0.05, potassium and sodium ion content (ppm): ≤3, viscosity:...

Embodiment 2

[0039] A preparation method of a high-performance polyurethane waterproof coating comprises the following steps: a prepolymer synthesis step, an activation step, a low-temperature catalysis step, and a heating step.

[0040] In the synthesis step of the prepolymer, 19 parts by weight of polyether polyols are added into a high-shear reactor, and after 11 minutes of high-shear, the reaction temperature is adjusted to 105°C, and then high-shear is carried out. Add 6.5 parts by weight of isocyanate and 0.2 parts by weight of silicone defoamer by shearing, continue high-shearing and heat-retaining reaction at 72°C for 1.5 hours to obtain the NCO-based prepolymer, turn off the high-shearing, and The NCO-based prepolymer was cooled to 36 °C and then stored in a high-shear reactor for further use.

[0041]The polyether polyol, chroma: ≤50, hydroxyl value: 107-117, moisture: ≤0.05, acid value (mgKOH / g): ≤0.05, potassium and sodium ion content (ppm): ≤3, viscosity: (25°C) mPa.s: 130-19...

Embodiment 3

[0048] A preparation method of a high-performance polyurethane waterproof coating comprises the following steps: a prepolymer synthesis step, an activation step, a low-temperature catalysis step, and a temperature-raising step.

[0049] In the synthesis step of the prepolymer, 20 parts by weight of polyether polyol is added into a high-shear reaction kettle, and after 12 minutes of high-shear, the reaction temperature is adjusted to 110°C, and then high-shear is carried out. Add 7 parts by weight of isocyanate and 0.3 parts by weight of silicone defoamer by shearing, continue high-shearing and heat-retaining reaction at 75°C for 2 hours to obtain the NCO-based prepolymer, turn off the high-shearing, and NCO The base prepolymer was cooled to 37°C and then stored in a high-shear reactor for further use.

[0050] The polyether polyol, chroma: ≤50, hydroxyl value: 107-117, moisture: ≤0.05, acid value (mgKOH / g): ≤0.05, potassium and sodium ion content (ppm): ≤3, viscosity: (25°C) ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Viscosityaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a high-performance polyurethane waterproof coating and a preparation method thereof. The preparation method comprises the following steps of prepolymer synthesis, activation, low-temperature catalysis and heating, and used raw materials comprise polyether polyol, isocyanate, an organic silicon defoamer, nano titanium dioxide, calcium stearate, calcium oxide, alkyl ketene dimer and the like. The high-performance polyurethane waterproof coating disclosed by the invention has the beneficial effects that the high-performance polyurethane waterproof coating disclosed by the invention is not liable to flow after being thickly coated for 3mm; the surface drying time of the polyurethane waterproof coating can be shortened to 3 hours, and the hard drying time can be shortenedto 10 hours; the coating is resistant to low temperature and does not crack at -40 DEG C; moreover, the high-performance polyurethane waterproof coating disclosed by the invention belongs to a single-component polyurethane waterproof coating and is low in price.

Description

technical field [0001] The invention relates to the field of waterproof coatings, in particular to a preparation method of high-performance polyurethane waterproof coatings. Background technique [0002] Polyurethane waterproof coatings are prepolymers containing isocyanate groups formed by addition polymerization of isocyanate and polyether, together with catalysts, anhydrous additives, anhydrous fillers, solvents, etc., and processed through mixing and other processes One-component polyurethane waterproof coating. This type of coating has the characteristics of high strength, high elongation, good water resistance, etc., and has strong adaptability to the deformation of the base layer. However, with the promotion and use of waterproof coatings, the disadvantages of existing polyurethane waterproof coatings are becoming more and more obvious, including being sensitive to the environment and not resistant to low temperature; it is easy to flow after one scrape coating, and ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C09D175/04C09D125/14C09D123/06C09D191/06C09D7/61C09D7/63C09D7/65C08G18/10C08G18/48
CPCC08G18/10C08G18/48C08K2003/2206C08K2003/2241C08K2201/011C08L2205/025C08L2205/035C09D175/04C09D7/61C09D7/63C09D7/65C09D7/67C08L75/04C08L25/14C08L23/06C08L91/06C08K13/02C08K3/22C08K5/098C08K5/1525
Inventor 隋永滨
Owner 潍坊市璇宝防水材料有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com