High-impact water-supply pipe granular material and preparation method thereof

Abstract

The invention discloses a high-impact water-supply pipe granular material and a preparation method thereof, wherein the high-impact water-supply pipe granular material is a blending system comprising PVC (Polyvinyl Chloride) resin and additives blended in the PVC resin; the additives comprise a toughening agent, stabilizing agents, a lubricant, a filling agent, a processing aid and titanium pigment; the stabilizing agents include an organic tin stabilizing agent and epoxidized soybean oil; and the contents of all the components in parts by weight are as follows: 100 parts of the PVC resin, 3.5-11 parts of the toughening agent, 2-4 parts of whole body of the two stabilizing agents, 1.5-3.5 parts of the lubricant, 4-12 parts of the filling agent, 1.5-6 parts of the processing aid and 0-0.5 part of the titanium pigment. A water-supply pipe produced by the granular material has good appearance and good toughness, the anti-impact strength is higher than 68kJ / m<2>, the Vicat heat deformation temperature is higher than 72 DEG C, and after being frozen for 60 minutes at the temperature of 0 DEG C, a cracking phenomenon can not occur when the water-supply pipe freely falls from a 10m high position.

Description

technical field [0001] The invention relates to a polymer composite material and a preparation method thereof, in particular to a high-shock water supply pipe fitting granular material and a preparation method thereof. Background technique [0002] At present, the most commonly used plastic water supply pipe fittings are UPVC (or PVC-U) pipes, which have the advantages of light weight, corrosion resistance, small water flow resistance, convenient construction and installation, low maintenance energy consumption, and low price. However, it has the disadvantages of high brittleness and poor impact resistance, and is not suitable for construction in winter or low temperature, which affects the popularization and use of PVC-U pipes. [0003] Chinese patent document CN1624040A discloses a UPVC pipe fitting granular material for water supply and a preparation method thereof, including PVC resin, heat stabilizer, processing aid, impact modifier, lubricant and colorant. [0004] Ch...

AI Technical Summary

Problems solved by technology

Although it is recorded in the description that "silica gel coupling agent contains a polar group at one end of the molecule, "silica gel coupling agent" is not a well-known material in the field, and it is still unclear what kind of group the polar group is, and it is not clear How polar groups modify silica gel to make silica gel coupling agent, so that its structure and composition cannot be judged

It can be seen that the composition, structure, preparation method and source of the silica gel coupling agent are not described in the specification, and those skilled in the art cannot determine what kind of substance it is (excerpted from the original text of the third examination opinion notice of the patent application for this invention)

On the other hand, even if the silica gel coupling agent can act as a coupling agent, its weight accounts for as much as 7% to 15% of the calcium carbonate weight, which not only increases the production cost, but also excessive coupling agent will damage PVC. The fluidity of the melt increases the difficulty of injection molding into molding processing

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