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

Polyurethane gel coat combination capable of spraying blades of fan conventionally and preparation method of polyurethane gel coat combination

A fan blade, polyurethane technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of contradiction between gel time and sandability and drying degree, labor-intensive, low roller coating construction efficiency, etc. Conflict between glue time and sandability and dryness, saving manpower and material resources, and the effect of good machinability

Active Publication Date: 2012-07-18
天津德威涂料化工有限公司
View PDF5 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The construction efficiency of roller coating is low, and the surface state of the coating film is uneven. After curing, it takes a lot of manpower to perform post-processing such as sanding, which not only causes waste of human resources and consumables, but also greatly reduces the average film thickness of the coating film. The loss and waste of clothing is very large, and its overall anti-corrosion effect will also be affected
Although the construction of special spraying equipment improves the efficiency of construction and solves the waste of post-processing, it has a large investment in equipment, high equipment maintenance costs, high energy consumption such as heating and pressurization, and a certain degree of safety hazards
[0003] The fundamental reason for the short gel time is that the curing reaction of the polyurethane gel coat is very slow without the addition of metal drier. Although the gel time is long, the drying time is very slow. Generally, it takes more than 48 hours to reach the post-polish finish. The drying conditions of the treatment, and adding a drier can greatly reduce the drying time, and can meet the post-treatment requirements within 2.5 hours, but the gel time will also be shortened accordingly, and it cannot be sprayed with conventional equipment
At present, there is a contradiction between gel time, sandability and drying degree in the polyurethane gel coat industry

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
  • Polyurethane gel coat combination capable of spraying blades of fan conventionally and preparation method of polyurethane gel coat combination
  • Polyurethane gel coat combination capable of spraying blades of fan conventionally and preparation method of polyurethane gel coat combination
  • Polyurethane gel coat combination capable of spraying blades of fan conventionally and preparation method of polyurethane gel coat combination

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] 242g of commercially available Sovermol 750 polyester polyol of Corning Company, 145g of Sovermol 819 polyester polyol of commercially available Corning Company, 3.2g of BYK-110 dispersant, 2.5g of SH-6040 silane coupling agent of Dow Corning Company, dilauric acid Dibutyltin 0.85g, retarder diethyl malonate 28g pre-mixed for 10min until uniform, add 112g of alumina, flake modified mica powder 63g, titanium dioxide 156g, carbon black 0.8g, and act in a high-speed centrifugal disperser Disperse for 45 minutes until the fineness is less than 45 microns to obtain the gel coat main agent. The finished polyurethane gel coat was obtained by mixing the main agent with 440 g of the commercially available Bayer N3300HDI trimer. The viscosity of this system after mixing is 94s (20°C, T-4cup), the gel time after mixing is 108min, and the polishing time is 122min. Spraying is carried out on conventional spraying equipment with a nozzle of 0.23 inches, and the thickness of the coat...

Embodiment 2

[0047] 210g of Sovermol 750 polyester polyol of commercially available Corning Company, 188g of Sovermol 819 polyester polyol of commercially available Corning Company, 3.2g of BYK-110 dispersant, 0.68g of dibutyltin dilaurate, retarder diethylmalonate Premix 26.5g of ester for 10min until uniform, add 112g of alumina, 63g of flaky modified mica powder, 156g of titanium dioxide, and 0.8g of carbon black, and disperse for 45min under the action of a high-speed centrifugal disperser until the fineness is below 45 microns to obtain glue Clothes agent. The finished polyurethane gel coat was obtained by mixing the main agent with 452 g of the commercially available Bayer N3300HDI trimer. The viscosity of this system after mixing is 89s (20°C, T-4cup), the gel time after mixing is 139min, and the polishing time is 147min. Spraying is carried out on conventional spraying equipment with a nozzle of 0.23 inches, and the thickness of the coating film reaches 200 microns at one time, an...

Embodiment 3

[0049] 242g of commercially available Sovermol 750 polyester polyol of Corning Company, 145g of commercially available Sovermol 819 polyester polyol of Corning Company, 3.2g of BYK-110 dispersant, 1.15g of dibutyltin dilaurate, retarder diethylmalonate Premix 34g of ester for 10min until uniform, add 112g of alumina, 63g of flaky modified mica powder, 156g of titanium dioxide, and 0.8g of carbon black, and disperse for 45min under the action of a high-speed centrifugal disperser until the fineness is below 45 microns to obtain a gel coat main agent. The finished polyurethane gel coat was obtained by mixing the main agent with 440 g of the commercially available Bayer N3300HDI trimer. The viscosity of this system after mixing is 93s (20°C, T-4cup), the gel time after mixing is 97min, and the polishing time is 118min. Spraying is carried out on conventional spraying equipment with a nozzle of 0.23 inches, and the thickness of the coating film reaches 200 microns at one time, an...

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 provides a polyurethane gel coat combination capable of spraying blades of a fan conventionally and a preparation method of the polyurethane gel coat combination. The combination is prepared by the following steps: mixing polyester polyol and an isocyanate curing agent according to a certain proportion to serve as a main film former, and adding a filler, a pigment, auxiliaries and areaction regulator. The reaction regulator includes a drier and a retardant, and the retardant includes one or more Louis acidic compounds having double-teeth ligand structures. Therefore, the gelation time of the polyurethane gel coat is effectively prolonged, the spraying operation can be realized with conventional coating equipment, the current reality that solvent-free gel coats for the blades of a fan can only be coated in a roller coating way or by adopting special equipment is changed, not only is the excellent protecting performance of the solvent-free polyurethane gel coats realized,but also the fine processability of the solvent-free polyurethane gel coats is realized. The invention also provided a preparation method of the polyurethane gel coat combination. The polyurethane gel coat combination prepared according to the invention also has the excellent properties of being tough and tensile, wear-resisting, sand-wind-resisting, ultraviolet-resisting and ageing-resisting andthe like.

Description

technical field [0001] The invention relates to a solvent-free polyurethane gel coat for wind power blades, in particular to a solvent-free polyurethane gel coat composition for fan blades that can be conventionally sprayed. Background technique [0002] At present, the polyurethane gel coat in the wind power blade industry generally produces exothermic gel within 30 minutes (25°C) and cannot be used any longer. Therefore, conventional spraying equipment cannot be used for construction. Currently, roller coating and double-pipe pre-coating are mainly used in coating construction. There are two organizational forms for thermal spraying equipment construction. The construction efficiency of roller coating is low, and the surface state of the coating film is uneven. After curing, it takes a lot of manpower to perform post-processing such as sanding, which not only causes waste of human resources and consumables, but also greatly reduces the average film thickness of the coating...

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): C09D175/06C09D7/12
Inventor 张晓村张海鹏雷振国
Owner 天津德威涂料化工有限公司
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