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Anti-aging polyurethane material, preparation method and application thereof

A polyurethane material, aging-resistant technology, used in mechanical equipment, machines/engines, wind power generation, etc., can solve problems such as irritation to the eyes, difficulty in defoaming, and air bubbles in the blade matrix, so as to prolong the soaking time, improve the soaking effect, and improve the molding efficiency. high effect

Pending Publication Date: 2021-12-10
ZHUZHOU TIMES NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 2. Prepolymer method, prepare double raw materials, one part is chain extender and the other part is prepolymer. The disadvantage is that after the reaction between isocyanate and polyol is complete, the viscosity of prepolymer is relatively high. The mixing process is more difficult, and there is a greater process difficulty
[0007] This method uses aliphatic isocyanate IPDI and PTMG / MOCA as raw materials to prepare polyurethane materials, which are resistant to yellowing, but the initial viscosity of the material is high below 30°C, and it is difficult to defoam, and the operation time above 30°C is short, so it is not suitable for large-scale composite materials. In addition, this method does not involve the method of improving the material's aging resistance, moisture resistance and heat resistance
[0008] Other patents, such as the 201280051640.4 patent, disclose a method for synthesizing polyisocyanurate using isocyanate trimers. This method contains a large number of rigid groups in the polyurethane molecular chain. Due to the large amount of free isocyanate groups, it will make it Reacts with water to generate carbon dioxide, and the polyurethane material produced has defects and poor performance; in the 201510815382.8 patent, polyols with pentaerythritol as the initiator are used to replace glycerin polyols, which improves the water absorption of polyols, but does not solve the problem of water in reinforcing materials and isocyanate The problem of bubbles in the reaction
The 201410840608.5 patent discloses an acrylic compound containing hydroxyl groups, which reduces the viscosity of polyurethane resin and improves the wettability of the reinforcing material with the resin. The viscosity of the material is too low, causing air bubbles to permeate the resin, resulting in air bubble defects in the blade matrix
[0009] Wind turbine blades for offshore wind turbines have high requirements on the heat and humidity resistance of materials. At present, wind turbine blades made of polyurethane materials cannot solve the above problems well.

Method used

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  • Anti-aging polyurethane material, preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A component preparation:

[0049] Hydroxyl value 250mg / KOH / g, bisphenol A / polyoxyethylene ether 65wt% with a functionality of 2, double metal cyanide complex catalysis, unsaturation 0.02mmol / g, hydroxyl value 350mg / KOH / g is poly Propylene oxide trihydric alcohol 25wt%, diethylene glycol 4wt%, wetting agent BYK310 0.5wt%, catalyst (B41 produced by Japan Tosao Co., Ltd. and bismuth isooctanoate ratio 1:1) are mixed, and the temperature is raised to 120°C , dehydration for 2 hours under vacuum ≤-0.95MPa, control the water content ≤0.05%, cool down to room temperature, add defoamer BYK-088 0.4wt%, oxazolidine-type water-absorbing agent ALT-301 5wt%, mix evenly, and seal it for storage.

[0050] B component preparation:

[0051] The total amine content accounts for ≥96% of the total end groups, the acetylation value is 280mg / KOH / g, the polyetheramine D400 with a functionality of 2 is dehydrated at 6.5wt%, and the water content is ≤0.05%. The material is cooled to room tempe...

Embodiment 2

[0056] Preparation of component A: hydroxyl value 300mg / KOH / g, bisphenol A / polyoxypropylene ether with a functionality of 2 60wt%, double metal cyanide complex catalysis, unsaturation 0.02mmol / g, hydroxyl value 300mg / KOH / g is polyethylene oxide trihydric alcohol 30wt%, diethylene glycol 4wt%, wetting agent BYK310 0.5wt%, catalyst (B41 produced by Japan Tosao Co., Ltd. and bismuth isooctanoate ratio 1:1) 0.1wt % mixed, heated to 110°C-125°C, dehydrated for 1.5h-2.5h under vacuum degree ≤-0.95MPa, controlled water content ≤0.05%, cooled to room temperature and added defoamer BYK-060N 0.4wt%, oxazolidine Water-absorbing agent ALT-101 5wt% is mixed evenly and sealed for storage.

[0057] Preparation of component B: the total amine content accounts for ≥96% of the total end groups, the acetylation value is 200mg / KOH / g, the functionality is 2 polyetheramine SD401 7.2wt% dehydration, the water content is ≤0.05%, the material is cooled to room temperature, Add 0.01wt% of side reacti...

Embodiment 3

[0061] Preparation of component A: hydroxyl value 150mg / KOH / g, bisphenol A / polyoxypropylene ether with a functionality of 2 55wt%, double metal cyanide complex catalysis, unsaturation 0.02mmol / g, hydroxyl value 600mg / KOH / g is 35wt% of polyoxyethylene glycol, 4wt% of 1.2-propylene glycol, 0.5wt% of wetting agent BYK310, and 0.1wt% of catalyst (B41 and bismuth isooctanoate ratio 1:1 produced by Japan Tosao Co., Ltd.) , heat up to 110°C-125°C, dehydrate under vacuum ≤-0.95MPa for 1.5h-2.5h, control the water content ≤0.05%, cool down to room temperature and add defoamer BYK-060N 0.4wt%, oxazolidine water-absorbing agent SL-1015wt% mixed evenly and sealed for storage.

[0062] Preparation of component B: the total amine content accounts for ≥96% of the total end groups, the acetylation value is 370KOH / g, the functionality is 3 polyetheramine AMT403 5.7wt%, the water content is ≤0.05%, the material is cooled to room temperature, and the side reaction is added Inhibitor benzoyl ch...

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Abstract

The invention relates to an anti-aging polyurethane material, a preparation method and application. The anti-aging polyurethane material comprises a polyol composition and an isocyanate prepolymer, wherein the polyol composition comprises the following components by weight: 55-70% of bisphenol A / polyoxyalkylene, 20-35% of polyoxyalkylene alcohol, 2-8% of a low molecular alcohol compound, 0.2-0.7% of an impregnating compound, 5-10% of an oxazolidine compound, 0.1-0.5% of a defoaming agent and 0.05-0.2% of a catalyst, the isocyanate prepolymer comprises the following components in percentage by weight: 85-95% of isocyanate and 5-15% of polyether amine, and further comprises a polymerization inhibitor accounting for 0.01-0.03% of the total weight of the isocyanate and the polyether amine. Theanti-aging polyurethane material has relatively high heat aging resistance and damp-heat aging resistance.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to an aging-resistant polyurethane material, a preparation method and an application. Background technique [0002] Research on the preparation and performance of polyurethane resin composite materials, Zhao Qingbo, master's degree thesis of Beijing University of Chemical Technology, disclosed the urethane bond structure in the molecular structure of polyurethane, which makes this resin material excellent in mechanical properties, and has excellent chemical resistance and chemical resistance. Aging. Its main raw materials include polyisocyanate (including diisocyanate) and polymeric polyol (polyether and polyester), as well as chain extenders, such as small molecule diols BDO, TMP, or amines such as MOCA. [0003] The preparation method of polyurethane resin comprises three kinds, [0004] 1. One-step method, that is, directly mix polyisocyanate with polymer ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/48C08G18/32C08G18/66C08G18/20C08G18/22C08L75/08C08L83/10C08K5/353F03D80/00
CPCC08G18/7671C08G18/5024C08G18/10C08G18/6674C08G18/4829C08G18/4833C08G18/4812C08G18/3206C08G18/4808C08G18/4825C08G18/2063C08G18/227C08G18/163C08L75/08F03D80/00C08G18/66C08L83/10C08K5/353Y02E10/72
Inventor 杨军许双喜曹彦海彭超义王进冯兴卓张坚强朱军李斌
Owner ZHUZHOU TIMES NEW MATERIALS TECH
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