A kind of high-impact polyvinyl chloride water supply pipe and its preparation method

A technology for polyvinyl chloride and water supply pipes, applied to pipes, rigid pipes, mechanical equipment, etc., can solve problems such as unsatisfactory effects, and achieve the effects of prolonging thermal stability time, simple and easy preparation method, and high processing efficiency

Active Publication Date: 2019-10-25
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there is a design in the prior art to add a processing modifier to improve the processing performance, the effect is not satisfactory

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0032] The preparation method of modified hyperbranched polyester is as follows: add hyperbranched polyester, benzoyl chloride and tetrahydrofuran pyridine into a four-neck flask according to the weight ratio of 5:1:20, stir and dissolve at room temperature, add 1% by weight of pyridine catalyst, and react at room temperature After 5 hours, add water to precipitate, wash with water several times, and vacuum-dry at 70° C. The resulting precipitate is the modified hyperbranched polyester.

[0033] The impact modifiers used in Examples 1 to 5 are: ACR is synthesized by multi-step seed emulsion polymerization, its core layer and middle layer are polybutylacrylate (PBA) with a cross-linking degree of 9%, and the shell layer is connected to styrene (St) and methyl methacrylate (MMA). MBS is a core-shell structure polymer synthesized by emulsion grafting, in which the core layer is butadiene-styrene polymer, and the shell layer is methyl methacrylate and butyl methacrylate. Core lay...

Embodiment 6

[0036] The impact modifier used in Example 6 is: ACR is synthesized by multi-step seed emulsion polymerization, its core layer and middle layer are polybutylacrylate (PBA) with a crosslinking degree of 8%, and the shell layer is grafted with benzene Ethylene (St) and methyl methacrylate (MMA). MBS is a core-shell structure polymer synthesized by emulsion grafting, in which the core layer is butadiene-styrene polymer, and the shell layer is methyl methacrylate and butyl methacrylate. Core layer butadiene-styrene polymer with 20% butadiene. The mass ratio of methyl methacrylate and butyl methacrylate in the shell layer is 4:1.

Embodiment 7

[0037] The impact modifier used in Example 7 is: ACR is synthesized by multi-step seed emulsion polymerization, its core layer and middle layer are polybutylacrylate (PBA) with a crosslinking degree of 8%, and the shell layer is grafted Styrene (St) and methyl methacrylate (MMA). MBS is a core-shell structure polymer synthesized by emulsion grafting, in which the core layer is butadiene-styrene polymer, and the shell layer is methyl methacrylate and butyl methacrylate. Core layer butadiene-styrene polymer with 25% butadiene. The mass ratio of methyl methacrylate and butyl methacrylate in the shell layer is 4:1.

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Abstract

The invention discloses a high-impact resistance polyvinyl chloride water supply tube and a production method thereof, and belongs to the technical fields of processing and application of polymer materials. The tube comprises 100 parts of PVC resin, 0.8-1.5 parts of an organic tin stabilizer, 5-6 parts of an impact modifier, 2-5 parts of a processing assistant, 1.5-2 parts of a lubricant, 0.4-0.8part of an antioxidant, 0.1-0.2 part of a colorant and 1-5 parts of a filler; and the processing assistant is modified hyperbranched polyester. The modified hyperbranched polyester is obtained by modifying the branched terminal group of hyperbranched polyester with formyl chloride, and the retention rate of final branched terminal hydroxyl groups is 40-50%. The high-impact resistance polyvinyl chloride water supply tube has the advantages of good impact resistance, good processing performances, good fluidity of a mixture in the processing process, and easiness in processing and molding. The production method of the high-impact resistance polyvinyl chloride water supply tube has the advantages of simplicity, easiness in implementation, and high processing efficiency.

Description

technical field [0001] The invention belongs to the technical field of processing and application of polymer materials, and in particular relates to a high-impact polyvinyl chloride water supply pipe and a preparation method thereof. Background technique [0002] PVC pipes have an absolute advantage in the global plastic pipe market, accounting for more than 60% of the entire plastic pipe market. After decades of development, there have been three main varieties of PVC pipes at home and abroad: PVC-U pipes, PVC-M pipes and PVC-O pipes. [0003] PVC-M (Modified PVC) pipe is developed on the basis of PVC-U pipe, which is characterized by excellent toughness and impact resistance, and can better resist slight scratches, Uneven drop of point load and foundation reduces pipeline damage during operation. PVC-M pipes have a high balance between rigidity and toughness, while PVC is a brittle material. It must be toughened and modified for the production of PVC-M pipes, and the hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08L67/00C08L33/08C08L51/04C08K13/02C08K5/58C08K5/57C08K5/524C08K3/04C08K3/26F16L9/12
Inventor 贾小波肖恩琳张学明李长春张强孔秀丽许永森王秀丽
Owner CHINA PETROLEUM & CHEM CORP
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