Polyurethane composition for preparing polyurethane composite material

A composite material and polyurethane technology, which is applied in the field of polyurethane composite materials and polyurethane compositions of polyether polyols, can solve the problems such as the inability to meet the requirements of the preparation process of large-scale polyurethane composite materials.

Active Publication Date: 2014-09-17
COVESTRO DEUTSCHLAND AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, the operable time of the polyurethane resin can also be extended by improving the polyurethane resin formula. For example, US20120245286 discloses a polyurethane resin composition for preparing composite materials. The operable time of the polyurethane resin composition is 30-40 minutes. Still can not meet the requirements of large-scale polyurethane composite material preparation process

Method used

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  • Polyurethane composition for preparing polyurethane composite material
  • Polyurethane composition for preparing polyurethane composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-6

[0076] The isocyanates of Examples 1-6 (i.e. the mixture of different ratios of ISO1 and ISO2, see Table 1) were vacuumized at room temperature for 1-2h to remove the bubbles in the raw materials, and the moisture content in Arcol1048 was controlled below 0.1%. Vacuumize at room temperature for 1-2h to remove the air bubbles in the raw material. Then, mix the isocyanate and Arcol1048 (NCO index 1.02) according to the ratio in Table 1, then add 0.5wt.% of BYK066N and 0.5wt.% of H8006R, stir and start timing, record the viscosity of the mixture to 600mPas (25°C )time.

[0077] Table 1: Polyurethane compositions and their work times

[0078]

[0079] It can be seen from the data in Table 1 that the working time of the polyurethane composition of the present invention has been significantly improved. Especially when the 2,2' and 2,4'-MDI content exceeds 29%, the operable time can reach a time length of more than 1 hr. Resin systems with long pot times provide sufficient pot ...

Embodiment 7

[0081] The polyurethane resin matrix was prepared with the polyurethane composition of Example 3, and its properties were tested.

[0082] Vacuumize the isocyanate component (containing 50wt% of ISO1 and 50wt.% of ISO2) at room temperature for 1-2h to remove the air bubbles in the raw material. Control the moisture content in Arcol1048 below 0.1%, then add BYK066N and H8006R, stir mechanically for 10 minutes to make it evenly mixed, and vacuumize for 1-2 hours at room temperature to remove the bubbles in the raw materials. The two components were mixed and poured into a mold, cured at room temperature for 12 hours, and then cured at 70° C. for 1 hour to obtain a polyurethane resin matrix. The performance parameters of the obtained polyurethane resin matrix are as follows.

[0083] Table 2: Properties of polyurethane resin matrix

[0084] physical properties Example 7 standard test Hardness (Shore D) 86 ASTM D-2240 Tensile strength (Mpa) 64 ISO52...

Embodiment 8

[0087] The polyurethane composite material of this example was prepared by a vacuum infusion process based on the polyurethane composition of Example 3, and its properties were tested.

[0088] The operation is carried out on a glass plate: the uniaxial glass fiber cloth (purchased from Satex Dongying Co., Ltd., uniaxial glass fiber, 0 degree direction, 14EU970-01190-(width)-100000) is placed on the sprayed mold release The upper surface of the glass plate of the agent, and then put the release cloth, the guide net and the vacuum bag on it in turn. The front part of this device is connected to the vacuum, and the rear part is connected to the liquid resin through the guide tube;

[0089] Vacuumize the isocyanate component (containing 50wt% of ISO1 and 50wt.% of ISO2) at room temperature for 1-2h to remove the air bubbles in the raw material. Control the moisture content in Arcol1048 below 0.1%, then add BYK066N and H8006R, stir mechanically for 10 minutes to make it evenly mi...

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Abstract

The invention relates to a polyurethane composition for preparing a polyurethane composite material. The initial viscosity of the polyurethane composition at 25DEG C is 10-600mPas. The composition comprises: a) a polyisocyanate component, wherein the polyisocyanate component includes 10-56wt% of 2,2'-diphenylmethane diisocyanate and 2,4'-diphenylmethane diisocyanate; and b) an isocyanate responsive component, wherein he isocyanate responsive component includes 30-100wt% of one or more glycerin-initiated polyether polyol, the hydroxyl value of the polyether polyol is 120-450mg KOH/g, and the viscosity of the polyether polyol is 50-450mPas. The invention also relates to a polyurethane composite material prepared by using the polyurethane composition, and a preparation method of the composite material.

Description

technical field [0001] The invention relates to a polyurethane composition for preparing a polyurethane composite material, in particular to a polyurethane composition containing glycerin-initiated polyether polyol. The invention also relates to a polyurethane composite material prepared from the polyurethane composition, and a method for preparing the composite material. Background technique [0002] Due to its light weight and high mechanical strength, polyurethane composite materials have been widely used in many fields such as automobiles, construction, and fan blades. For example, WO2011069975 discloses a fan blade made of polyurethane composite material. [0003] Polyurethane composites have a variety of preparation methods, such as infusion, winding, pultrusion, hand lay-up, resin transfer molding, etc. Among them, the polyurethane vacuum infusion process is a relatively common method, which usually introduces the resin into the mold by forming a negative pressure i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/48C08L75/08B29C70/44
CPCB29C70/44C08G18/4829C08G18/7671C08L75/08C08G2110/0075
Inventor 顾永明成源孙国斌郑伊辰
Owner COVESTRO DEUTSCHLAND AG
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