Fast-cured, high-performance and low-cost unsaturated polyester prepreg and preparation method thereof

Abstract

The invention relates to fast-cured, high-performance and low-cost unsaturated polyester prepreg and a preparation method thereof. The fast-cured, high-performance and low-cost unsaturated polyester prepreg comprises a continuous fiber or textile, wherein a resin matrix is impregnated in the continuous fiber or textile; the resin matrix is prepared from vinyltoluene, unsaturated polyester, an initiator, a polymerization inhibitor, organic montmorillonite, silicon dioxide and aluminum hydroxide; the content, in percentage by mass, of the resin matrix is 15 to 60 percent; the unsaturated polyester prepreg is covered with a polyethylene film, a polypropylene film, an aluminum-plated film or silicone release paper; fiber woven fabric and multiple unidirectional fibers are impregnated respectively by adopting a unique high-toughness resin matrix; the prepreg is enabled to have the characteristics of not containing styrene and having low molding cost, low toxicity, low volatility, environmental friendliness, corrosion resistance, flame retardancy and the like; the preparation method is high-efficiency and stable; the fast-cured, high-performance and low-cost unsaturated polyester prepregcan be fast cured and is used for decreasing cost by a wide margin when being applied to a composite material, and the manufacturing efficiency of a component is obviously promoted.

Description

technical field [0001] The invention relates to a fast-curing, high-performance and low-cost unsaturated polyester prepreg and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] High-performance carbon fiber-reinforced resin-based composites have been widely valued in the fields of aviation, aerospace, weapons, and ships due to their high specific strength, high specific modulus, performance designability, and excellent comprehensive performance, and have been widely used in the aerospace field. wider application. With the widespread application of carbon fiber prepreg products in recent years, from aerospace to renewable energy, it is rapidly developing and becoming an ideal choice for composite materials in a wide range of applications. In fact, the prepreg matrix resin industry as a whole is currently quite attractive due to the widespread acceptance of prepregs and some new market opportunities. [0003] P...

AI Technical Summary

Problems solved by technology

[0004] Rapid curing molding means that the resin system can quickly react and solidify at a certain temperature. Generally, the curing time is less than 20 minutes. During the preparation of rapid curing resins, especially in the process of industrialized mass preparation, the rapid reaction may cause the resin system to explode, resulting in resin scrapping and safe question

In addition, unsaturated ester resins usually need to add peroxide initiators for normal temperature curing or heat curing, but when curing at room temperature, it takes a long time to achieve complete curing, and the work efficiency is relatively low. It generally contains about 35% styrene monomer, and styrene has a low vapor pressure and a large amount of volatilization, which will cause air pollution on the job site, be harmful to the human body, and may cause changes in the composition ratio of the resin composition. Reduce its performance, in addition, the resin content and yield may also be lost, and it is highly prone to fire

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