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

A technology of fan blades and polyurethane, which is applied in the direction of coating, etc., can solve the problems of gel time and sandability dryness, consume a lot of manpower, and low efficiency of roller coating, so as to solve the problems of gel time and sandability And the contradiction of drying degree, saving manpower and material resources, and the effect of good processability

Active Publication Date: 2013-09-04
天津德威涂料化工有限公司
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  • 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

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  • 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

[0044] 242g of commercially available Sovermol750 polyester polyol of Corning Company, 145g of Sovermol819 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, dibutyltin dilaurate 0.85g, retarder diethyl malonate 28g, pre-mixed for 10min until uniform, add 112g of alumina, 63g of flaky modified mica powder, 156g of titanium dioxide, 0.8g of carbon black, and disperse under the action of a high-speed centrifugal disperser 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 grinding time is 122min. Spraying is carried out on conventional spraying equipment with a nozzle of 0.23 inches, and the thickness...

Embodiment 2

[0046] 210g of commercially available Sovermol750 polyester polyol of Corning Company, 188g of Sovermol819 polyester polyol of commercially available Corning Company, 3.2g of BYK-110 dispersant, 0.68g of dibutyltin dilaurate, 26.5g of retarder diethyl malonate g pre-mixed for 10 minutes to mix evenly, add 112g of alumina, 63g of flaky modified mica powder, 156g of titanium dioxide, and 0.8g of carbon black, and disperse for 45 minutes under the action of a high-speed centrifugal disperser until the fineness is below 45 microns to obtain a gel coat. 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 grinding 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 ti...

Embodiment 3

[0048] 242g of commercially available Sovermol750 polyester polyol of Corning Company, 145g of commercially available Sovermol819 polyester polyol of Corning Company, 3.2g of BYK-110 dispersant, 1.15g of dibutyltin dilaurate, and 34g of retarder diethyl malonate Pre-mix for 10 minutes until evenly mixed, add 112g of alumina, 63g of flaky modified mica powder, 156g of titanium dioxide, and 0.8g of carbon black, and disperse for 45 minutes under the action of a high-speed centrifugal disperser until the fineness is below 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 93s (20°C, T-4cup), the gel time after mixing is 97min, and the grinding 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 ...

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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 a reaction 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 and the 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. At present, 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 coatin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/00C09D175/06C09D7/12
Inventor 张晓村张海鹏雷振国
Owner 天津德威涂料化工有限公司
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