Epoxy-zinc soap compound as heat stabilizer for compounding polyvinyl chloride plastic

Abstract

The present invention discloses one kind of epoxy-zinc soap compound as heat stabilizer for compounding polyvinyl chloride plastic. The heat stabilizer includes epoxy-zinc soap compound as main stabilizer, organic compound as co-stabilizer, and polyethylene as outer lubricant, and may also includes anionic laminated material, antioxidant, inner lubricant and other assistants. The stabilizer system may be used in compounding plasticized and unplasticized polyvinyl chloride plastic. The stabilizer is superior to available calcium-zinc stabilizer as far as the performance of polyvinyl chloride product.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a composite zinc soap heat stabilizer used for extrusion and injection molding of polyvinyl chloride resins. Background technique [0002] Calcium-zinc heat stabilizers for PVC processing currently available on the market are mainly suitable for the processing of PVC soft products; when used for the processing of hard products, the stabilization performance is not enough, or the products are easy to cause initial coloring. These disadvantages limit their application in PVC rigid products. [0003] The Chinese patent publication number is CN 1091757A, the invention patent of priority 92.5.27 US 889551 discloses a polymer composition additive, which is composed of organotin compounds or / and organozinc compounds, epoxides, and lubricants. made. The advantage of this invention is that by adjusting the ratio of epoxides to organozinc compounds in the additive system to an optimum va...

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Problems solved by technology

However, this invention is not suitable for melting processing of hard products such as PVC water supply and drainage pipes and profiles because it uses epoxy with plasticizing effect as one of the basic components and its content is relatively large.

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