Chlorinated polyvinylchloride mixing material

Abstract

The invention discloses a chlorinated polyvinylchloride mixing material, which comprises the following components, by weight, 100 parts of a chlorinated polyvinylchloride resin, and 0.5-10 parts of chlorinated polypropylene. According to the present invention, the chlorinated polypropylene is added to the chlorinated polyvinylchloride resin so as to increase a plasticizing performance of the chlorinated polyvinylchloride resin during a processing process, reduce a plasticizing temperature, and improve processability, such that the obtained mixing material has a good demolding performance, and performances of notched impact strength, tensile strength and the like of the product are improved.

Description

technical field [0001] The invention relates to a chlorinated polyvinyl chloride compound. Background technique [0002] Chlorinated polyvinyl chloride resin (CPVC), also known as perchlorethylene, is a chlorinated product of polyvinyl chloride (PVC). Theoretically, the highest chlorine content of CPVC can reach 73.2%. Currently, it is produced by the aqueous phase method. The chlorine content of CPVC is usually controlled at 61%-68%. When the chlorine content increases to more than 65%, the tensile strength and bending strength of CPVC increase linearly due to the increase in polarity, and at the same time, the brittleness also increases, and the melt viscosity is more than twice higher than that of PVC. [0003] Since the chlorine content of CPVC is greatly improved compared with PVC, the physical and mechanical properties of CPVC, especially corrosion resistance, high temperature resistance, deformability, solubility and flame retardancy and self-extinguishing properties...

AI Technical Summary

Problems solved by technology

Adding a certain amount of internal and external lubricants can reduce the plasticizing temperature, but since most lubricants, especially internal lubricants that are compatible with CPVC, have a low melting point, it often causes a very severe drop in Vicat , so that CPVC products lose their high-dimensional card characteristics and are not easy to meet the standard

If simply adding an external lubricant will lead to lubrication precipitation, and the processing process is unstable, so that the CPVC mixture with smooth surface and good processing performance cannot be obtained

[0006] Chlorinated polypropylene is a thermoplastic material obtained by modifying polypropylene through chlorination. The polypropylene can be passed through the solvent method, solid phase method and aqueous phase suspension chlorination technology by passing an appropriate amount of chlorine gas or liquid chlorine in the initiator. It is chlorinated in the presence of CPVC, which is similar to CPVC in part of the structure, and has good fluidity and cohesiveness. The melting point of chlorinated polypropylene with different chlorine content is different. When the chlorine content of chlorinated polypropylene It has a low melting point at 30% and has a certain degree of crystallinity. Chlorinated polypropylene is widely used in the production of coatings and adhesives, and has also been reported in PVC blended modified soft products, but in chlorinated polypropylene The application in the processing and modification of PVC hard products has not been reported yet

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