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Pouring polyurethane resin for wind power blades and preparation method thereof

A technology of polyurethane resin and wind power blades, which is applied in the field of wind power, can solve the problems of short gel time, moisture sensitivity of polyurethane, and bulging, etc., and achieve the effect of simple preparation method, low moisture sensitivity and high mechanical strength

Active Publication Date: 2022-04-01
四川东树新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are also vinyl epoxy resins and unsaturated resins used to infuse wind turbine blades, but they all have defects such as high shrinkage rate and toxic and harmful volatile substances such as styrene, which cannot be accepted by the market in the end.
[0005] As the most widely used resin, polyurethane has important applications in related fields such as furniture, tanning, and composite materials. However, because polyurethane is sensitive to moisture, its application in the field of polyurethane-based composite materials that requires no foaming has been greatly restricted.
The currently reported polyurethane systems are generally inconvenient to use and operate, short gel time, poor mechanical properties, sensitive to humidity, easy to produce bubbles, bulges, whitening and other prominent defects during the perfusion process, and cannot be applied to perfusion of wind power blade plates

Method used

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  • Pouring polyurethane resin for wind power blades and preparation method thereof
  • Pouring polyurethane resin for wind power blades and preparation method thereof
  • Pouring polyurethane resin for wind power blades and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0044] The preparation method of pouring polyurethane resin for wind power blades of the present invention comprises the following steps:

[0045] a. Preparation of component A: After the reaction kettle is dried, add polymerized isocyanate, then add isocyanate monomer, and finally add initiator, stir and mix evenly under a protective atmosphere to obtain component A;

[0046] b. Preparation of component B: After the reactor is dried, add 2-functionality polyether polyol, then add 3-functionality polyether polyol, 2 / 5~3 / 5 reactive diluent, heat up to 60~80℃ , add water remover, stir for 20-40min; cool down to below 30°C, add the remaining active diluent, mix well, then add defoamer, catalyst and accelerator to obtain combination B.

[0047] Wherein, there is no chronological order between step a and step b, step a can be performed first to obtain component A, and then step b can be performed to obtain component B; step b can also be performed first to obtain component B, and t...

Embodiment 1～4

[0073] The product formula is shown in Table 1. Wherein, the initiators of embodiment 1 and comparative examples 1 to 4 all adopt cumene hydroperoxide, the initiator of embodiment 2 adopts methyl ethyl ketone peroxide, and the initiator of embodiment 3 adopts tertiary 2-ethylhexanoic acid peroxide Butyl ester, the initiator of embodiment 4 adopts tert-butyl peroxybenzoate. The 3-functional polyether polyol used in Comparative Example 4 is a polyglycerol polyol with a functionality of 3, the brand name is VORANOL TM 2070, the trifunctional polyether polyols used in the remaining examples and comparative examples are cardanol-modified polyether polyols with a functionality of 3, brand NX9008L.

[0074] Table 1

[0075]

[0076]

[0077] Product parameters such as viscosity, refractive index, and moisture are shown in Table 2. In Table 2, "—" means no detection.

[0078] Table 2

[0079]

[0080] The product preparation method is as follows:

[0081] Preparation of co...

Embodiment 5

[0087] The pouring preparation of embodiment 5 pouring body

[0088] The preparation of the pouring body in this experiment is at room temperature, the temperature is 20-25°C, and the humidity is 50-65%. There is no need to control the temperature and humidity in the room or operate it in a vacuum glove box.

[0089] 1. Mix the prepared components A and B according to the ratio of 92 parts of component A and 100 parts of component B, mix and stir evenly, put the uniformly mixed composition into the vacuum defoaming machine, turn on the vacuum defoaming for 10 minutes, The vacuum pressure is -0.095Mpa.

[0090] 2. Pour the prepared mixture carefully into the pre-prepared glass interlayer. The glass interlayer is sealed with a 4mm-thick silicone rope around it, and a glue injection port is left. The inner glass surface is coated with a release agent. Combine Once done, secure with threaded clips.

[0091] 3. After pouring into the glass interlayer, seal it with black sealant i...

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Abstract

The invention relates to pouring polyurethane resin for wind power blades and a preparation method thereof, and belongs to the field of wind power technology composite materials. The perfusion polyurethane resin for wind power blades of the present invention includes component A and component B which are packaged separately and mixed when used; said component A includes polymerized isocyanate, isocyanate monomer and initiator; said component B includes 2 functional Polyether polyols, trifunctional polyether polyols, water scavengers, reactive diluents, defoamers, polyurethane delayed catalysts and accelerators. The invention is a two-component polyurethane system. The mixed polyurethane system has the advantages of low mixing viscosity, long gel time, high mechanical strength and low moisture sensitivity. The composite material product prepared by the polyurethane has no bubbles and excellent FRP performance , fully meet the requirements of wind turbine blade manufacturing. Moreover, the preparation method is simple, the raw material cost is low, and defects such as bubbles and whitening do not occur during the pouring process, and can be widely used in the preparation of various large-scale wind power blade composite materials.

Description

technical field [0001] The invention relates to pouring polyurethane resin for wind power blades and a preparation method thereof, belonging to the technical field of wind power. Background technique [0002] With the rapid development of the economy, the demand for energy is also growing rapidly, and wind energy, as a green renewable energy, has received more and more attention, and the wind power industry is also developing at a rapid speed. Wind turbine blades are one of the important components of wind turbines, which mainly play the role of capturing wind power and passing it on to the generator set. Most of the current wind turbine blades in the world are made of fiber-reinforced composites (FRP) produced through the vacuum-assisted infusion process. When producing these composite material blades of more than 30 meters, 40 meters, 50 meters or even 60 meters, the excellent process performance of the vacuum infusion resin itself will determine the quality of the produc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/67C08G18/48
CPCC08G18/672C08G18/4812C08G18/48
Inventor 熊高虎周百能杨红钟连兵苟鹏飞肖毅
Owner 四川东树新材料有限公司
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