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
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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

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

Example Embodiment

[0044] Example 1

[0045] 242g of commercially available Corning Sovermol 750 polyester polyol, 145g of commercially available Corning Sovermol 819 polyester polyol, 3.2g of BYK-110 dispersant, 2.5g of Dow Corning SH-6040 silane coupling agent, dilauric acid 0.85g of dibutyltin, 28g of retarder diethyl malonate, premixed for 10min until uniformly mixed, add 112g of alumina, 63g of flake modified mica powder, 156g of titanium dioxide, 0.8g of carbon black, and act on a high-speed centrifugal disperser Disperse for 45 minutes to a fineness of 45 microns or less to obtain a gel coat main agent. The main agent is mixed with 440g of commercially available Bayer N3300HDI trimer to obtain a finished polyurethane gel coat. The viscosity of the system after mixing is 94s (20℃, T-4cup), the gel time after mixing is 108min, the grinding time is 122min, the pump pressure ratio is 65:1, the inlet pressure is 0.3-0.6MPa, Spraying construction is realized on conventional spraying equipment wi...

Example Embodiment

[0046] Example 2

[0047] 210g of commercially available Corning Sovermol 750 polyester polyol, 188g of commercially available Corning Sovermol 819 polyester polyol, BYK-110 dispersant 3.2g, dibutyltin dilaurate 0.68g, retarder diethyl malonate Ester 26.5g is pre-mixed for 10 minutes until it is evenly mixed. Add 112g aluminum oxide, 63g flake modified mica powder, 156g titanium dioxide, 0.8g carbon black, and disperse it under the action of a high-speed centrifugal disperser for 45 minutes to a fineness below 45 microns Main agent. The main agent is mixed with 452g of commercially available Bayer N3300HDI trimer to obtain a finished polyurethane gel coat. The viscosity of the system after mixing is 89s (20℃, T-4cup), the gel time after mixing is 139min, the grinding time is 147min, the pump pressure ratio is 65:1, the inlet pressure is 0.3-0.6MPa, Spraying construction is realized on conventional spraying equipment with a nozzle of 0.23 inches. The thickness of the coating fil...

Example Embodiment

[0048] Example 3

[0049] Combine 242g of Sovermol 750 polyester polyol from Corning, 145g of Sovermol 819 polyester polyol from Corning, 3.2g of BYK-110 dispersant, 1.15g of dibutyltin dilaurate, and diethyl malonate as retarder. 34g of ester is pre-mixed for 10 minutes until it is evenly mixed. 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 for 45min to a fineness below 45 microns to obtain a gel coat Main agent. The main agent is mixed with 440g of commercially available Bayer N3300HDI trimer to obtain a finished polyurethane gel coat. The viscosity of the system after mixing is 93s (20℃, T-4cup), the gel time after mixing is 97min, the grinding time is 118min, the pump pressure ratio is 65:1, the inlet pressure is 0.3-0.6MPa, Spraying construction is realized on conventional spraying equipment with a nozzle of 0.23 inches. The thickness of the coating...

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PUM

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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 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

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Application Information

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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
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