A kind of preparation method of water-soluble maleic anhydride modified PP emulsion

Abstract

The invention discloses a preparation method of water-soluble maleic anhydride modified PP emulsion for fiber surface treatment. The preparation method comprises the following steps: selecting components for preparation, preparing an intermediate, and emulsifying the intermediate. Compared with a certain imported emulsion, the storage period of the provided PP emulsion is prolonged by 90 days at a room temperature; the PP emulsion is still stable after being stored for 90 days at a temperature of -40 DEG C, while the imported emulsion starts to demulsify in the 65th day; the storage period of the PP emulsion can reach 120 days at a temperature of 60 DEG C, while the storage period of the imported emulsion can only reach 50 days.

Description

technical field [0001] The invention belongs to the field of binders, and relates to a water-soluble emulsion that can be used in the fiber spinning process and can endow fiber materials such as glass fibers with cohesiveness and bundling properties. The main component of the emulsion is modified maleic anhydride. Non-toxic PP, its main function is as the main binder in the production and processing of glass fiber. The continuous glass fiber roving treated with the binder can be used to reinforce polypropylene to obtain long glass fiber reinforced polypropylene composite materials. Background technique [0002] In the glass fiber production process, from molten glass to glass fiber monofilament to glass fiber precursor products, it is essential to use a sizing agent to coat and wrap the glass fiber surface to protect the fragile glass fiber , to give glass fiber flexibility, clustering and the interface affinity effect of glass fiber and matrix resin in its downstream appli...

AI Technical Summary

Problems solved by technology

However, the cost of this type of sizing agent is relatively high, and the waste of sizing agent is large. The content of organic matter on the glass fiber is often about 7%, and the production cost of glass fiber is also relatively high. When producing glass fiber reinforced polypropylene modified materials, If the output is not very large and the production speed is not very fast, the product cost is high

And because usually after using the sizing agent of patent 98806774, when the obtained glass fiber product is reinforced PP, the production speed is often very high, reaching 300 m / min, although the obtained modified material has been treated with a wax similar to the structure of polypropylene Emulsion coating, but after actual injection molding, the mechanical properties are often low. The main reason is that under the excessively fast production speed, polypropylene only has a coating effect on the glass fiber, and the ideal interface fusion effect has not been achieved. During the injection process In the case of short injection time, the two can not fully integrate the effect

Although this invention has applications, the price of emulsion products is very high, resulting in an increase in the price of glass fiber products, which no longer occupies the mainstream of the market.

[0005] In addition, there is a certain imported emulsion product on the market, which is obtained based on the modification of a certain polypropylene wax. Using this emulsion as the main component of the glass fiber sizing agent, glass fiber rovings for reinforcing polypropylene can be obtained. When roving is used to reinforce polypropylene, the general production speed is 30 m / min. The obtained LFT material has good mechanical properties, but there are several problems: 1. The emulsion relies on imports, the storage period is short, and the price is high; 2. The use of this The production speed of glass fiber products obtained from emulsion is relatively slow in the modified production; 3. The mechanical properties of LFT materials obtained after glass fiber modification still have room for improvement

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