High-flame-retardant PVC product containing hyperbranched polymer

Abstract

The invention belongs to the field of PVC products, and particularly discloses a high-flame-retardant PVC product containing a hyperbranched polymer. The high-flame-retardant PVC product containing the hyperbranched polymer, disclosed by the invention, contains 90 to 110 parts by weight of a polyvinyl chloride resin, 20 to 40 parts of dioctyl terephthalate, 30 to 50 parts of light calcium carbonate, 20 to 30 parts of hydroxide, 3 to 5 parts of a calcium-zinc stabilizer, 0.3 to 0.7 part of polyethylene wax and 1 to 3 parts of a hyperbranched polymer. According to the invention, the hyperbranched polymer is used as an additive and is added into the PVC product containing a large amount of magnesium hydroxide / aluminum hydroxide, so that the plasticizing speed of the PVC product is effectivelyincreased, the flowability of the PVC product melt is obviously improved, and the physical properties of the PVC product are not influenced.

Description

technical field [0001] The invention belongs to the field of PVC products, in particular to a highly flame-resistant PVC product containing a hyperbranched polymer. Background technique [0002] PVC is one of the most widely used general-purpose materials in the world. etc. are widely used. [0003] Fire is a very common and very harmful disaster. Fire accidents often occur in daily life. Since most household materials are made of wood or textiles, fire hazards are very high, and PVC Although it has a certain flame retardant function, it can still burn, and it is accompanied by a lot of smoke, so now household PVC products need good flame retardant performance. [0004] At present, there are many flame-retardant PVC products on the market. The most common method is to add a large amount of aluminum hydroxide or magnesium hydroxide to the PVC formula, and compound it with PVC to improve its flame-retardant performance. However, adding aluminum hydroxide or magnesium hydrox...

AI Technical Summary

Problems solved by technology

However, adding aluminum hydroxide or magnesium hydroxide to PVC products can effectively improve the flame retardant performance of the product, but because aluminum hydroxide / magnesium hydroxide is an inorganic substance, the compatibility with PVC is poor, which will make PVC Reduced fluidity, resulting in slower plasticization

[0005] In addition to adding aluminum hydroxide / magnesium as a flame retardant, some manufacturers will use antimony trioxide as a flame retardant, but compared with aluminum / magnesium hydroxide, the cost of antimony trioxide is higher, and it will also affect Stability of PVC

[0006] At present, for the problems of poor fluidity and low plasticizing efficiency caused by magnesium hydroxide / aluminum, a common solution is to add acrylate copolymers to the PVC formula. The mechanism of action of this type of processing aid is mainly acrylate When the copolymer is processed, some components first melt and adhere to the surface of the PVC resin, and the external heat and shear force are transferred to the PVC resin powder faster, thereby breaking the winding structure of the PVC resin and promoting its further development. Melt plasticization, improve the melt strength, and improve the appearance quality of the product

However, the effect of acrylate copolymer is relatively single, and its effect in soft PVC is not obvious, and it cannot cooperate with inorganic fillers. In addition, the price of acrylate copolymer is also high

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