Unlock instant, AI-driven research and patent intelligence for your innovation.

Easy-to-disperse self-extinction waterborne polyurethane curing agent and preparation method

A water-based polyurethane, self-extinguishing technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor surface extinction retention, incompatibility of matting agent and resin, poor storage stability of resin, etc. The effect of good light effect, small gloss fluctuation and excellent resistance

Active Publication Date: 2020-07-10
广东巴德富新材料有限公司
View PDF11 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, in order to have better self-emulsifying and dispersing properties, domestic water-based polyisocyanate curing agents are mostly modified with non-ionic substances such as polyether, which often have the disadvantages of long drying time and poor water resistance of the coating film.
In addition, with the change of the aesthetic concept of the current coating film, the matt coating is widely used in various types of topcoats because of its natural appearance. At present, the matting coating is mainly made by adding a matting agent to the resin, but this method is usually The matting agent is incompatible with the resin, resulting in poor storage stability of the resin, uneven gloss on the surface of the coating film, and insufficient physical strength of the coating film.

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
  • Easy-to-disperse self-extinction waterborne polyurethane curing agent and preparation method
  • Easy-to-disperse self-extinction waterborne polyurethane curing agent and preparation method
  • Easy-to-disperse self-extinction waterborne polyurethane curing agent and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of preparation method of easily dispersing self-extinction waterborne polyurethane curing agent, comprises the following steps:

[0027] 1) 630g of trimer of hexamethylene diisocyanate, 9.6g of sodium p-hydroxybenzenesulfonate, 12g of propylene glycol butyl ether acetate, 3g of dimethylcyclohexylamine, trimethylhydroxyethylethylenediamine Add 2g into the reaction kettle, heat and stir, and keep it warm for 2h when heated to 80°C;

[0028] 2) Add 0.15g of organic bismuth, dropwise add 17.5g of polyethylene glycol monomethyl ether with a molecular weight of 350, and 6.7g of 2,2-dimethylolpropionic acid, dropwise add within 1h, and keep warm for 1h;

[0029] 3) Raise the temperature to 130°C again until the system becomes clear, add 0.25g of dimethylcyclohexylamine, dropwise add 8g of hexamethylene diisocyanate, add dropwise for 1.5h, and keep warm for 2h;

[0030] 4) Cool down to 40°C and discharge.

Embodiment 2

[0032] A kind of preparation method of easily dispersing self-extinction waterborne polyurethane curing agent, comprises the following steps:

[0033] 1) 720g of trimer of hexamethylene diisocyanate, 10.3g of sodium p-hydroxybenzenesulfonate, 30g of propylene glycol butyl ether acetate, 1.8g of dimethylcyclohexylamine, trimethylhydroxyethylethylene di Add 1.2g of amine into the reaction kettle, heat and stir, and keep it warm for 2h when heated to 80°C;

[0034] 2) Add 0.12 g of stannous octoate, dropwise add 15 g of polyethylene glycol monomethyl ether with a molecular weight of 500, and dropwise add 10.2 g of 2,2-dimethylolpropionic acid within 1 hour, and keep warm for 1 hour;

[0035] 3) Raise the temperature to 130°C again until the system becomes clear, add 0.3g of dimethylcyclohexylamine, dropwise add 11.3g of hexamethylene diisocyanate, add dropwise for 2h, and keep warm for 1h;

[0036] 4) Cool down to 35°C and discharge.

Embodiment 3

[0038] A kind of preparation method of easily dispersing self-extinction waterborne polyurethane curing agent, comprises the following steps:

[0039] 1) Mix isophorone diisocyanate trimer (70%, NCO%=12.2%) 630g, sodium sulfamate 2.2g, propylene glycol butyl ether acetate 16.3g, triethylenediamine 0.5g, NMP 0.5 g is added to the reaction kettle, heated and stirred, and when heated to 75°C, keep warm for 2 hours;

[0040] 2) Raise the temperature to 85°C, add 0.15g of dibutyltin dilaurate, dropwise add 20g of polyethylene glycol monomethyl ether with a molecular weight of 500, and 10.2g of 2,2-dimethylolpropionic acid, and finish the dropwise addition within 1h , keep warm for 1h;

[0041] 3) Heat up to 130°C again, until the system becomes clear, add 0.2 g of N-methylpyrrolidone, add 13.6 g of isophorone diisocyanate dropwise, add dropwise for 2 hours, and keep warm for 1 hour;

[0042] 4) Cool down to 40°C and discharge.

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

No PUM Login to View More

Abstract

The invention discloses an easy-to-disperse self-extinction waterborne polyurethane curing agent and a preparation method thereof. The curing agent is prepared from the following raw materials by weight: 600-750 parts of a polyisocyanate prepolymer, 5-15 parts of a polyisocyanate monomer, 1-15 parts of sulfonate or a derivative thereof, 5-15 parts of a hydrophilic chain extender, 15-25 parts of polyether polyol, 1-10 parts of a catalyst, and 10-35 parts of a co-dispersant and a stabilizer. According to the preparation method, step-by-step preparation is adopted, sulfonate is added firstly to improve the water dispersibility of the curing agent, then the hydrophilic chain extender and hydrophilic polyether are added to further improve the molecular weight, meanwhile, a grafting point is provided, heating is continuously carried out for grafting NCO, and then the stable waterborne polyisocyanate curing agent which can be self-emulsified and has a relatively large particle size is obtained. The easy-to-disperse self-extinction waterborne polyurethane curing agent provided by the invention can be matched with a waterborne hydroxy-acrylic emulsion or a hydroxy-acrylic dispersion to prepare a two-component hydroxy-acrylic coating. A hydroxyl-acrylic emulsion with a relatively small particle size (smaller than 250nm) is compounded, and the matte effect of a coating film is particularly better.

Description

technical field [0001] The invention relates to an easily dispersible self-delustering water-based polyurethane curing agent and a preparation method thereof, belonging to the field of polyurethane coatings. Background technique [0002] With the emergence of relevant laws and regulations such as low-carbon economy, green chemistry, low VOC, energy saving and emission reduction, environmental protection has become the development trend of today's coating resin industry. Two-component water-based polyurethane technology is in line with this principle. It can solve the problem of poor physical properties of water-based one-component polyurethane coatings. The performance is comparable to solvent-based two-component polyurethane coatings and has the characteristics of low VOC of water-based coating resins. Among them, water-dispersible polyisocyanate, as an important component of two-component waterborne polyurethane, plays a vital role in the performance of the coating film an...

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): C08G18/79C08G18/73C08G18/75C08G18/28C08G18/34C09D175/08
CPCC08G18/725C08G18/73C08G18/755C08G18/792C08G18/283C08G18/348C08G18/288C09D175/08
Inventor 李同军蔡锡松万李岑婉莹
Owner 广东巴德富新材料有限公司
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com