Unlock instant, AI-driven research and patent intelligence for your innovation.

A high-impact cold-resistant polyvinyl chloride drainage pipe and its preparation method

A technology for polyvinyl chloride and drainage pipes, applied in the field of PVC materials, can solve the problems of high processing costs, decline in other product properties, reduce the modulus and heat resistance of PVC pipes, and achieve the effect of improving performance

Active Publication Date: 2022-01-28
HAINAN LESSO TECH IND CO LTD
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the performance defects of PVC resin itself, it shows a certain degree of brittleness to the outside, poor toughness at room temperature, low impact strength, and greater brittleness at low temperatures
Therefore, PVC-U drainage pipes are prone to pipe rupture accidents during transportation, installation, and construction in low-temperature environments in winter
[0003] Aiming at the low-temperature toughness of PVC pipes, many patents have recorded related solutions, such as patents CN104130525 A, CN 107177136 A, CN 104130526 A, CN 105218966 A, CN 105693891 A, CN106008757 A, etc. Modified montmorillonite, nano-silica or modified nano-silica are used as modifiers to improve the low-temperature toughness of PVC pipes, but when using these modifiers, other problems are also brought about. When the modified montmorillonite is used, the modulus and heat resistance of the PVC pipe will be reduced, and the color of the PVC pipe will be darkened and affect the appearance; when nano-silica or modified nano-silica is used, the The cost is relatively high, and there must be agglomeration phenomenon in the processing process of nano-level silica, which will affect the performance and quality stability of PVC pipes; while CN 105693891 A and CN 106008757 A are designed to low temperature in their invention names Toughness, but it does not give the toughness data under low temperature conditions, so it is not known whether the scheme it records can improve the low temperature toughness of PVC pipes
[0004] Although there are other solutions reported so far, while improving low-temperature toughness, it is easy to bring other problems, such as high processing costs and degradation of other properties of the product, etc.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1 Preparation of EPDM-g-(GMA-co-St)

[0022] EPDM-g-(GMA-co-St) is prepared using the following raw materials in parts by weight:

[0023] EPDM elastomer (EPDM, Dow Chemical Company (DOW) EPDM grade: 820P, ethylene content: 80%): 100 parts;

[0024] Glycidyl methacrylate (GMA): 1.5 parts;

[0025] Styrene (St): 0.8 parts;

[0026] Dicumyl peroxide (DCP): 0.15 parts;

[0027] Tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate]pentaerythritol ester (1010): 0.05 parts.

[0028] The preparation process is as follows: all the above-mentioned raw materials are uniformly mixed on a double-roller mill, and the mixture is fed into a single-screw extruder at 110-150° C. for melting and grafting to prepare EPDM-g-(GMA-co-St).

Embodiment 2

[0029] Example 2 PVC drainage pipe prepared with EPDM-g-(GMA-co-St) as modifier

[0030] A low-temperature toughened polyvinyl chloride drainage pipe is prepared by using the following raw materials in parts by weight:

[0031] 100 parts of PVC resin (SG-5), 3.5 parts of calcium / zinc stabilizer, 0.2 parts of processing modifier (ACR), 3 parts of impact modifier (EPDM-g-(GMA-co-St)) , calcium carbonate: 12.5 parts, lubricant: 0.6 parts, pigment (titanium dioxide): 2.5 parts.

[0032] The preparation process is as follows: after hot mixing and cold mixing, all the above-mentioned raw materials are added to the conical twin-screw extruder for extrusion, and the PVC- U drainage pipe.

Embodiment 3

[0033] Example 3 PVC drainage pipe prepared with EPDM-g-(GMA-co-St) as modifier

[0034] A low-temperature toughened polyvinyl chloride drainage pipe, the raw materials and preparation method of which are the same as in Example 2, the difference is that 5 parts of impact modification additive (EPDM-g-(GMA-co-St)), Calcium carbonate: 20 parts.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a high-impact and cold-resistant polyvinyl chloride drainage pipe and a preparation method thereof. The high-impact and cold-resistant polyvinyl chloride drainage pipe is prepared by blending EPDM-g-(GMA-co-St) as a toughening modifier with PVC, other carriers or additives. The present invention modifies the EPDM elastomer through a multi-monomer melt grafting modification method to prepare EPDM-g-(GMA-co-St), and utilizes the functionalized EPDM-g-(GMA-co-St) elasticity In order to improve the low temperature flexibility, weather resistance and heat resistance of the body, PVC-U drainage pipes with high weather resistance and low temperature impact resistance have been developed by toughening and modifying PVC.

Description

technical field [0001] The invention relates to the technical field of PVC materials, in particular to a high-impact and cold-resistant polyvinyl chloride drainage pipe and a preparation method thereof. Background technique [0002] Polyvinyl chloride (PVC) is one of the five general-purpose plastic resins. It has the advantages of high strength, plasticization, corrosion resistance, flame retardancy, and good insulation. Its products have a very wide range of uses. PVC-U pipe is a very cost-effective plastic pipe, which accounts for about 50% of the total plastic pipes, of which PVC-U drainage pipes account for about 40%. However, due to the performance defects of PVC resin itself, it shows a certain degree of brittleness to the outside, poor toughness at room temperature, low impact strength, and greater brittleness at low temperatures. Therefore, PVC-U drainage pipes are prone to pipe rupture accidents during transportation, installation, and construction in low-temperat...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08L51/04C08K3/26C08F255/06C08F220/32C08F212/08
Inventor 赵红磊李志君于人同肖福全
Owner HAINAN LESSO TECH IND CO LTD