Functional master-batch for organosilane crosslinked polyethylene pipe, and preparation method and application of functional master-batch

Abstract

The invention discloses functional master-batch for an organosilane crosslinked polyethylene pipe, and a preparation method and application of functional master-batch, which belong to the technical field of master-batch for engineering plastics. 100 parts of high density polyethylene, 25-35 parts of an adsorbing agent, 5-10 parts of a lubricating agent, 2-5 parts of an antioxidant, 2-5 parts of a light stabilizer and 3-6 parts of a crosslinking accelerant are stirred through a high stirring machine, subjected to twin-screw extrusion, pelleted and the like to obtain the functional master-batch; and the functional master-batch is used for extrusion molding of the large-caliber organosilane crosslinked polyethylene pipe. The preparation method of the functional master-batch is simple and suitable for industrial production; the method is applied to the extrusion molding of the large-caliber organosilane crosslinked polyethylene pipe; the pipe processing stability is good; the extension rate and the self-crosslinking speed of the obtained pipe are far better than those of a common pipe; and the functional master-batch facilitates a pipe manufacturer and can be added according to different devices and pipe specifications, and 2-5% of the master-batch can be added directly into a common silane crosslinking material, so that a pipe can be extruded after uniform stirring.

Description

technical field [0001] The invention belongs to the technical field of masterbatches for engineering plastics, and specifically relates to a functional masterbatch for silane crosslinked polyethylene pipes, which can accelerate crosslinking speed and improve extrusion processing performance, and a preparation method thereof. and uses. Background technique [0002] PEX materials have good heat resistance and creep resistance. At present, the common silane crosslinking materials on the market are mainly used to produce small-diameter pipes (D20-25) and large-diameter PEX pipes (D110-315). , The application is still blank in China. The ordinary two-step method of silane crosslinking AB material to produce pipes, in the production process, there will be problems of gel and equipment accumulation, so the equipment needs to be cleaned regularly, and the continuous production cycle is short; the cost of improving the equipment is relatively large and It cannot be used in common w...

AI Technical Summary

Problems solved by technology

The ordinary two-step silane crosslinked AB material production pipe, in the production process, there will be problems of gel and equipment accumulation, so the equipment needs to be cleaned regularly, and the continuous production cycle is short; the cost of improving the equipment is relatively large and It cannot be used in common with ordinary PE pipe extrusion equipment, so it increases the cost for the manufacturer; in addition, ordinary silane cross-linked pipes need to be boiled after extrusion to complete cross-linking in a short time, which increases site investment and energy. consume

Especially in the process of extrusion production of large-diameter and wall-thickness cross-linked pipes, the above two problems are more prominent, which limits the application and promotion of PEX pipes in the field of large-diameter pipes

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