Latent curing agent type single-component polyurethane waterproof coating

A polyurethane waterproof and latent curing agent technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve problems affecting coating construction, etc., and achieve the effect of slow viscosity increase and high bonding strength

Active Publication Date: 2019-06-25
BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD
View PDF2 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the increase of the added latent curing amount, the viscosity of the one-component polyurethane waterproof coating, especially after storage, will increase rapidly, and even reach the level that affects the normal construction of the coating.

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
  • Latent curing agent type single-component polyurethane waterproof coating
  • Latent curing agent type single-component polyurethane waterproof coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Add polyether polyols, chlorinated paraffins, and fillers according to the weight parts given in Table 1 into the mixing reactor, and then dehydrate the mixture at a temperature of 120°C for 3 hours, and measure the water content in the system by the Karl Fischer method to be less than or equal to After 200ppm, lower the temperature of the reactor to 70°C, add polyisocyanate, wait for the temperature to stabilize and raise the temperature to 80°C, react for 3 hours, then lower the temperature to 70°C, react for 1 hour, then raise the temperature to 80°C again, and react for 2 hours , lower the temperature to 60°C, add catalyst, react for 1 hour, add latent curing agent, diluent and defoamer, react for 1 hour, cool to 50°C and discharge.

Embodiment 2 and Embodiment 3

[0043] Parts of Example 2 and Example 3,

[0044]Among the polyether polyols used, polyether diols (Yantai Wanhua C2056) and polyether trihydric alcohol (Yantai Wanhua F3135) weight ratio is 10:8;

[0045] In the filler adopted, the weight ratio of heavy calcium carbonate and carbon black is 37:3;

[0046] The latent curing agent used is Qingdao Hengke MS-201 latent curing agent.

Embodiment 2

[0048] Add 10 parts by weight of polyether polyol, 10 parts by weight of chlorinated paraffin and filler into the mixing reactor, then dehydrate the mixture at 120°C for 3 hours, and measure the water content in the system by Karl Fischer method to be less than or equal to 200ppm Finally, lower the temperature of the reactor to 70°C, add 30 parts by weight of polyisocyanate, wait for the temperature to stabilize and raise the temperature to 80°C, react for 3 hours, then cool down to 70°C, react for 1 hour, then raise the temperature to 80°C again, React for 2 hours, cool down to 60°C, add 0.01 parts by weight of catalyst, react for 1 hour, add 5 parts by weight of latent curing agent, 2.5 parts by weight of diluent and 0.1 parts by weight of defoamer, react for 1 hour, cool to Discharge after 50°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
hydroxyl valueaaaaaaaaaa
Login to view more

Abstract

The invention discloses a latent curing agent type single-component polyurethane waterproof coating. The latent curing agent type single-component polyurethane waterproof coating is prepared by a method comprising the following steps: 1) mixing polyether polyol, chlorinated paraffin and a filler, and dehydrating the mixture at 100-140 DEG C; 2) cooling to 55-75 DEG C, adding polyisocyanate into the mixture, raising the temperature to 80-95 DEG C, and reacting; 3) cooling to 55-75 DEG C, and reacting; 4) heating to 80-95 DEG C, and reacting; 5) cooling to 40-70 DEG C, adding a catalyst, and reacting; and 6) adding a latent curing agent, a diluent and a defoaming agent, reacting, cooling or keeping the temperature to 40-60 DEG C to obtain the latent curing agent type single-component polyurethane waterproof coating. The single-component polyurethane waterproof coating disclosed by the invention is relatively low in initial viscosity, the viscosity of the single-component polyurethane waterproof coating is increased slowly after being stored, the film surface is free of pinhole and bubble problems, and the adhesive strength of the single-component polyurethane waterproof coating and concrete or a cement base is high.

Description

technical field [0001] The invention belongs to the field of waterproof coatings, and more specifically relates to a latent curing agent type one-component polyurethane waterproof coating. Background technique [0002] Polyurethane waterproof coating has been widely recognized and applied in the field of building waterproofing because of its good overall waterproof effect, excellent physical and chemical properties, and convenient construction performance. [0003] Compared with the two-component polyurethane waterproof coating that needs to be pre-mixed with two components before construction, the one-component polyurethane waterproof coating does not need to be stirred before construction, and the requirements for the quality of the construction personnel are not high, and there are no two components. Risk of inaccurate metering of component ratios and uneven mixing. Therefore, in the field of civil and industrial construction, one-component polyurethane waterproof coatin...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C09D7/61C09D7/65C08G18/76C08G18/66C08G18/48C08G18/32C08G18/30
Inventor 邱岳王新锋蔡聿锋段存业段文锋
Owner BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap