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A kind of polyurethane resin composite material for civil engineering and its pultrusion molding process

The technology of polyurethane resin and composite material is applied in the field of preparation of large-scale composite profiles, which can solve problems such as low mechanical properties, achieve uniform content distribution, improve mechanical properties, and reduce resin fluidity.

Active Publication Date: 2022-01-18
南京聚发新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: To provide a polyurethane resin composite material for civil engineering and its pultrusion molding process to solve the problem that the mechanical properties of large-scale composite materials prepared by the extrusion pultrusion process are much lower than those of the same type prepared by the same process during use. Problems with small volume composites

Method used

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  • A kind of polyurethane resin composite material for civil engineering and its pultrusion molding process
  • A kind of polyurethane resin composite material for civil engineering and its pultrusion molding process

Examples

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Effect test

Embodiment 1

[0037] A pultrusion process of polyurethane resin composite materials for civil engineering, comprising:

[0038] Preparation of component B: Weigh 93 kg of castor oil and add it into a closed reaction kettle, raise the temperature to 120°C, vacuumize while stirring, stop vacuuming and heating after 2 hours, cool down to 80°C and add 121.6 kg of 100LL Carbodiimide modified MDI (Wanhua Company) was continued for 2 hours to obtain a prepolymer with an NCO content of 27%.

[0039] Preparation of component A: Weigh 80 kg of polyester 2915 (Stepan), 10 kg of castor oil polyol, 8 kg of 550D release agent (Technick Products), and 2 kg of activated 3A that has been baked at high temperature Molecular sieve, catalyst 0.5 kg FOMREZ UL-28 and 0.5 kg K-5218, a total of 1 kg, 1 kg of UV absorber benzophenone and 1 kg of anti-aging agent 2,5-ditertbutylhydroquinone are added to the stirring tank and stir well.

[0040] Fabric panels made of fiberglass are processed using the following pultr...

Embodiment 2

[0050] Wherein, the preparation process of component A and component B in this embodiment is the same as that of embodiment 1, except that the fabric sheet is replaced with fiber yarn. The specific extrusion molding process is as follows:

[0051] Step 1. The components A and B pumped out by the metering pump according to a predetermined ratio are mixed by a static mixer and then enter the sealed injection box of the two-component polyurethane pultrusion system;

[0052] Step 2. Dry and cool the fiber yarn in a vacuum oven, and then, driven by the tractor, enter the injection box at a certain tension and speed, until it can just cover the entire hot-press injection box;

[0053] Step 3: After drawing the resin-impregnated fiber yarn into the front section of the heating segmental heating mold, heating the front section of the segmental heating mold to 100° C., and maintaining constant temperature heating;

[0054] Step 4. While performing step S3, apply a pressure to press do...

Embodiment 3

[0060] The preparation process of A component and B component in this example is the same as that of Example 1, the difference is that the traditional production process is used to process the fabric sheet, and the specific extrusion molding process is as follows: A component and B The components are respectively imported into the two storage tanks A and B corresponding to the two-component glue supply system, and the fabric sheet made of glass fiber forms a certain tension from the creel through the yarn guide plate under the drive of the tractor, and is stretched at 280cm The speed of / min passes through the injection box connected with the two-component glue supply system (the injection frequency of the two-component glue supply system is 2Hz, the amount of glue injected each time is 200g, and the weight ratio of material B to material A is 1:1) , and make it fully infiltrated with the AB component mixed resin, enter the mold (the temperature of the three zones is 150°C, 180...

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Abstract

The invention discloses a polyurethane resin composite material for civil engineering and its pultrusion molding process, which belongs to the preparation of large-scale composite profiles. In the traditional extrusion molding process, the resin is cured by segmented heating and pressure. The invention optimizes the pultrusion process, reduces the fluidity of the resin by changing the temperature and pressure, makes the content distribution of the resin in the composite material more uniform, reduces the void ratio in the composite material, and improves the quality of the resin prepared by the pultrusion process. Mechanical properties of large composite materials.

Description

technical field [0001] The invention belongs to the preparation of large-scale composite profiles, in particular to a polyurethane resin composite material for civil engineering and its pultrusion molding process. Background technique [0002] A composite material is a multiphase material formed by combining two or more materials with different properties by a specific molding process. The performance of each material learns from each other and produces a synergistic effect, so that the composite material has better performance than the original components, and has been widely used. Especially in recent years, the use of composite materials in the fields of aerospace and wind power has been increasing, and it is hoped that they can be used properly to achieve lighter weight and better durability while maintaining or improving the performance of the parts. [0003] The extrusion molding process adopts the method of putting different resin components into the injection box re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/52
CPCB29C70/521B29C70/525B29C70/528
Inventor 鞠明杰邓军发成源贲进李钱胜
Owner 南京聚发新材料有限公司
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