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Modified polyvinyl chloride material and its preparation method

A polyvinyl chloride, modified technology, applied in the field of materials, can solve the problems of physical and mechanical performance decline, affect customer use, aging and discoloration, etc., achieve the effect of small change in mechanical properties, not easy to decompose, aging and discoloration, and prolong life

Active Publication Date: 2020-08-07
日丰企业(天津)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when ordinary PVC materials are used outdoors, they are easily decomposed by ultraviolet radiation to produce hydrogen chloride, and further autocatalyzed and decomposed, causing aging and discoloration, and rapid decline in physical and mechanical properties, affecting customer use.

Method used

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  • Modified polyvinyl chloride material and its preparation method
  • Modified polyvinyl chloride material and its preparation method
  • Modified polyvinyl chloride material and its preparation method

Examples

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preparation example Construction

[0020] A method for preparing a modified polyvinyl chloride material according to an embodiment of the present invention includes the following steps S1-S2:

[0021] S1. Mix titanium dioxide and carbon black and heat up to 60-80°C, then add titanate coupling agent, stir for 10-20 minutes, dry and grind to obtain a weather resistance additive with a particle size below 100nm, titanium dioxide, carbon black The mass ratio with the titanate coupling agent is 4-7:2-5:1.

[0022] In one embodiment, the mass ratio of titanium dioxide, carbon black and titanate coupling agent is 6:3:1, this ratio can obtain better performance relative to other ratios, and carbon black and titanium dioxide have a synergistic effect, but It is not advisable to add too much carbon black, otherwise it will easily lead to a decrease in the mechanical properties of the modified polyvinyl chloride material.

[0023] S2. Mix polyvinyl chloride, auxiliary materials and weather resistance additives, and then ...

Embodiment 1

[0033] Add 6kg of titanium dioxide and 3kg of carbon black to the high-speed stirring equipment, stir and gradually raise the temperature to 70°C, add 1kg of titanate coupling agent, then stir for 10-20min, take it out and dry it, put it into a grinder and grind it to obtain granules Weather resistance additives with a diameter below 100nm.

[0034] Stir 2kg of weathering aid and 100kg PVC in a high-speed mixer at a low speed (below 100r / min) for 5min, then add 4kg of calcium-zinc stabilizer, 15kg of active calcium carbonate, 2kg of internal lubricant and external lubricant to obtain a mixture. Stir at ~1500r / min until the temperature of the mixture reaches 120°C, then put the mixture into the cold mixing equipment and stir at 500r / min until the temperature of the mixture drops to 40-50°C, then extrude Modified polyvinyl chloride material pipes can be obtained by machine extrusion.

Embodiment 2

[0036] Add 6kg of titanium dioxide and 3kg of carbon black to the high-speed stirring equipment, stir and gradually raise the temperature to 70°C, add 1kg of titanate coupling agent, then stir for 10-20min, take it out and dry it, put it into a grinder and grind it to obtain granules Weather resistance additives with a diameter below 100nm.

[0037] 6kg of weathering aid and 100kg of PVC were stirred at a low speed (below 100r / min) for 5min in a high-speed mixer, then 4kg of calcium-zinc stabilizer, 15kg of active calcium carbonate, 2kg of internal lubricant and external lubricant were added to obtain a mixture. Stir at ~1500r / min until the temperature of the mixture reaches 120°C, then put the mixture into the cold mixing equipment and stir at 500r / min until the temperature of the mixture drops to 40-50°C, then extrude Modified polyvinyl chloride material pipes can be obtained by machine extrusion.

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Abstract

The invention relates to a preparation method for a modified polyvinyl chloride material. The preparation method comprises the following steps: mixing titanium dioxide with carbon black; raising temperature to 60-80 DEG C; then, adding titanate coupling reagent, stirring for 10-20min, and drying and grinding to obtain weather-proof accessory ingredient of which the particle size is 100nm or below,wherein the mass ratio of titanium dioxide, carbon black to the titanate coupling reagent is (4-7): (2-5):1; after polyvinyl chloride, auxiliary materials and the weather-proof accessory ingredient are evenly mixed, carrying out extrusion molding to obtain the modified polyvinyl chloride material. According to the preparation method, through preprocessing, titanium dioxide, carbon black and the titanate coupling reagent are more favorably dispersed and combined with polyvinyl chloride, in addition, the synergetic anti-ultraviolet function of titanium dioxide and carbon black can be improved,meanwhile, the titanate coupling reagent is more favorable for combining titanium dioxide, carbon black and polyvinyl chloride than other coupling reagents, so that the resistance ability of the polyvinyl chloride material for ultraviolet can be improved, the polyvinyl chloride material is unlikely to be decomposed, aged and discolored, mechanical performance change is small, excellent weather fastness is obtained, and the preparation method is especially suitable for preparing various classes of PVC (polyvinyl chloride) pipe materials.

Description

technical field [0001] The invention relates to the field of materials, in particular to a modified polyvinyl chloride material and a preparation method thereof. Background technique [0002] Polyvinyl chloride (PVC) is an amorphous white powder with a small degree of branching. The molecular weight of industrially produced PVC is generally in the range of 50,000 to 120,000. It has no fixed melting point. It begins to soften at 80 to 85°C and becomes Viscoelastic state, 160 ~ 180 ℃ began to change into a viscous fluid state, with good mechanical properties, tensile strength of about 60MPa, impact strength of 5 ~ 10kJ / m 2 , has excellent dielectric properties and flame retardancy, and is stable to organic and inorganic acids, alkalis, and salts. Therefore, PVC is an important construction engineering material, which is widely used in building materials, light industry, agriculture and other fields. Its products are mainly used in pipes such as drainage pipes and power thread...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08K13/06C08K9/04C08K3/22C08K3/04C08K3/26
CPCC08K3/04C08K3/22C08K3/26C08K9/04C08K13/06C08K2003/2241C08K2003/265C08K2201/005C08L27/06
Inventor 刘在福曾富财秦明臣蔡俊超汪磊
Owner 日丰企业(天津)有限公司
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