PVC composition for inspection wells and preparation method thereof

A composition and inspection well technology, applied in the field of PVC processing, can solve the problems of inability to meet the actual requirements of plastics used in inspection wells, unsatisfactory ring stiffness and tensile strength, and a small improvement range, and achieve easy operation and good resistance. Impact properties and flow properties, and the effect of improving compatibility

Active Publication Date: 2015-12-23
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN102816370A discloses a super-large plastic inspection well composite powder formula, which is technically composed of 91-95% linear low-density polyethylene resin, 3-3.9% antioxidant, 0.8-1.1% viscosity modifier, and reinforcing agent 1.2~4%, has excellent physical and mechanical properties and meets the requirements of industry standards, but the wall of the plastic part is thick and the cost is extremely high
[0004] At present, while the existing plastic compositions for inspection wells meet good impact resistance properties, the ring stiffness and tensile strength are not ideal, and cannot meet the actual requirements of plastics for inspection wells
The use of relatively high-priced materials as plastics for inspection wells, although the performance of the balance of rigidity and toughness has slightly improved, but the increase is not large, and in view of the relative increase in cost, it does not have the value of actual production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028]Embodiments 1 to 6 are specific implementations of a PVC composition for inspection wells of the present invention and a preparation method thereof, wherein embodiment 1 is the best embodiment. The proportioning components of the examples of the PVC composition for the inspection well are shown in Table 1.

[0029] The weather resistance modifier used in Examples 1 to 6 is a mixture of light stabilizer UV-419 and antioxidant 1010 in a weight ratio of 3:1, the colorant is a mixture of titanium dioxide and carbon black in a weight ratio of 5:1, and acrylonitrile - The content of butadiene component in styrene-butadiene copolymer resin is 40~50%.

[0030] Example 1

[0031] 1) Preparation of composite rigid particle modifier: weigh AS resin and nano-calcium carbonate at a weight ratio of 1:4; add AS resin to acetone, stir at room temperature to fully dissolve AS resin in acetone, and obtain AS Acetone solution with the resin as the solute; then add the acetone solution w...

Embodiment 2

[0036] 1) Preparation of composite rigid particle modifier: weigh AS resin and nano-calcium carbonate at a weight ratio of 1:4; add AS resin to acetone, stir at room temperature to fully dissolve AS resin in acetone, and obtain AS Acetone solution with the resin as the solute; then add the acetone solution with the AS resin as the solute to nano-calcium carbonate, mix and stir at a high speed for 10 minutes, and the mixing temperature is 60°C to volatilize the acetone to obtain a composite rigid particle modifier;

[0037] 2) 100 parts of 700-type PVC resin, 8 parts of calcium zinc stabilizer, 0.8 parts of microcrystalline wax, 1.5 parts of polyethylene wax, 1.2 parts of weather resistance modifier, and 1.5 parts of colorant are weighed in proportion and put into a high-speed mixer together Stir at medium and high speed. When the temperature rises to 100~120°C, put the mixture in the high-speed mixer into the low-speed mixer to stir and cool, and the temperature drops to 55°C t...

Embodiment 3

[0041] 1) Preparation of composite rigid particle modifier: weigh AS resin and nano-calcium carbonate at a weight ratio of 1:4; add AS resin to acetone, stir at room temperature to fully dissolve AS resin in acetone, and obtain AS Acetone solution with the resin as the solute; then add the acetone solution with the AS resin as the solute to nano-calcium carbonate, mix and stir at a high speed for 10 minutes, and the mixing temperature is 60°C to volatilize the acetone to obtain a composite rigid particle modifier;

[0042] 2) Weigh 100 parts of 700-type PVC resin, 7 parts of calcium zinc stabilizer, 1 part of stearic acid, 0.9 part of microcrystalline wax, 0.8 part of weather resistance modifier, and 2 parts of colorant, and put them into high-speed mixing Stir at high speed in the machine. When the temperature rises to 100~120°C, put the mixture in the high-speed mixer into a low-speed mixer to stir and cool, and the temperature drops to 55°C to discharge to obtain a polyvinyl...

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Abstract

The invention discloses a PVC composition for inspection wells and a preparation method thereof, and belongs to the PVC processing technical field. The composition is composed of the following components by the weight percentage: 50-70% of a PVC compound, 20-30% of an acrylonitrile-styrene-butadiene copolymer resin, and 10-20% of a composite rigid particle modifier. The PVC compound is composed of the following components in parts by weight: 100 parts of PVC resin, 5-8 parts of a calcium zinc stabilizer, 1.5-3.5 parts of a lubricant, 0.8-1.5 parts of a weather resistance modifier, and 1-2 parts of a colorant. The composite rigid particle modifier is a compound obtained by compounding AS resin and nano calcium carbonate according to the weight ratio of 1 to (4-6). The composition adopts rigid particles for toughening, so that the ring stiffness and the tensile strength of the composition are greatly improved under the condition without reduction of the impact strength of the composition; and the cost is low, and the production method is simple, convenient and controllable.

Description

technical field [0001] A PVC composition for inspection wells and a preparation method thereof belong to the technical field of PVC processing. Background technique [0002] The inspection well is commonly known as "inspection well". It is connected to the urban underground pipe network through buried ground. It is the confluence hub of the pipe network, which is convenient for regular inspection, cleaning and dredging of the pipes. Inspection wells need to be installed in places where public pipe network facilities such as water supply, drainage, telecommunications, electricity, gas, heating, fire protection, and sanitation are laid. Due to the relatively large defects in the comprehensive performance of inspection wells made of traditional materials such as bricks and cement, for example, brick-built wells are prone to the phenomenon that the mortar in the gaps is not dense, etc., and generally the well body is prone to subsidence and collapse within 1 to 2 years after com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L55/02C08K9/10C08K3/26C08K3/22C08K3/04
Inventor 刘容德李静刘浩张桦桂俊杰孙培培王晓敏高磊
Owner CHINA PETROLEUM & CHEM CORP
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