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Method for preparing diatomite modified PVC (Polyvinyl Chloride) plastics

A technology of diatomite and modification, which is applied in the field of modified plastics, can solve the problems of less application of modified plastics, and achieve the effects of good impact resistance, strong light transmittance, and good toughness

Inactive Publication Date: 2015-12-16
SUZHOU RONGCHANG COMPOUND MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, diatomite has been widely used in technical fields such as coatings and pesticides, but it is rarely used in the technical field of modified plastics.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Grind diatomite into a powder with a particle size of 30 μm; add 50 g of diatomite powder to 100 ml of distilled water, add 5 g of sodium metaphosphate and 15 g of stearic acid, react at 25 ° C for 2 hours, and dry to obtain Modified diatomite powder; weigh the following materials by weight: 100 parts of polyvinyl chloride resin, 20 parts of modified diatomite powder, 5 parts of dimethyl silicone oil, 3 parts of magnesium hydroxide, 3 parts of B-223, 2 (Methyl o-formate phenol) 0.1 part of triethanolamine aluminate, mix evenly, add to the twin-screw extruder, stir at 180°C for 10-15min, the speed of the host is 50rpm, cool the strip after extrusion, air-dry and cut Granules, that is, to prepare diatomaceous earth modified PVC plastics.

Embodiment 2

[0020] Grind diatomite into a powder with a particle size of 50 μm; add 50 g of diatomite powder to 100 ml of distilled water, add 5 g of sodium metaphosphate and 15 g of stearic acid, react at 25 ° C for 2 hours, and dry to obtain Modified diatomite powder; take the following materials by weight: 100 parts of polyvinyl chloride resin, 25 parts of modified diatomite powder, 5 parts of dimethyl silicone oil, 5 parts of magnesium hydroxide, 225 parts of B-22, 2 (Methyl o-formate phenol) 0.5 parts of triethanolamine aluminate, mix well, add to the twin-screw extruder, stir at 200°C for 10~15min, the speed of the main engine is 80rpm, cool the stretcher after extrusion, air-dry and cut Granules, that is, to prepare diatomaceous earth modified PVC plastics.

Embodiment 3

[0022] Grind diatomite into a powder with a particle size of 100 μm; add 50 g of diatomite powder to 100 ml of distilled water, add 5 g of sodium metaphosphate and 15 g of stearic acid, react at 25 ° C for 3 hours, and dry to obtain Modified diatomite powder; take the following materials by weight: 100 parts of polyvinyl chloride resin, 30 parts of modified diatomite powder, 6 parts of dimethyl silicone oil, 6 parts of magnesium hydroxide, B-228 parts, two (Methyl o-formate phenol) 1 part of triethanolamine aluminate, mix evenly, add to the twin-screw extruder, stir at 180°C for 10-15min, the speed of the host is 50rpm, cool the strips after extrusion, air-dry and cut Granules, that is, to prepare diatomaceous earth modified PVC plastics.

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Abstract

The invention discloses a method for preparing diatomite modified PVC (Polyvinyl Chloride) plastics. The method is characterized by comprising the following steps: (1) grinding diatomite into powder with the grain size of 10-100nm; (2) adding the diatomite powder obtained in the step (1) into water, adding light calcium carbonate and glycerol trihydroxy stearate into the diatomite powder added water, carrying out stirring reaction for 2-3 hours at room temperature, and carrying out drying, so as to obtain modified diatomite powder; and (3) weighing the following substances in parts by weight: 100 parts of PVC resin, 20-30 parts of the modified diatomite powder obtained in the step (2), 5-6 parts of simethicone, 3-6 parts of magnesium hydroxide, 3-8 parts of MBS processing aid and 0.1-1 part of stabilizer, uniformly mixing the substances, adding the mixture into a twin-screw extruder, carrying out stirring for 10-15 minutes at the temperature of 180-260 DEG C while the host revolution rate is 50-100rpm, carrying out extruding, then, carrying out cooling and drawing, and carrying out air-drying and pelleting. The diatomite modified PVC plastics prepared by the method have relatively good impact resistance and good toughness and are suitable for being extensively used.

Description

technical field [0001] The invention belongs to the technical field of modified plastics, and in particular relates to a preparation method of diatomite-modified PVC plastics. Background technique [0002] Polyvinyl chloride has good mechanical properties, electrical properties, corrosion resistance and flame retardancy, low price, and a wide range of raw materials, but PVC products have disadvantages such as high brittleness, poor thermal stability and flow properties in processing and medical use, which limits the material usage of. The modification of PVC can improve the toughness, stiffness and strength of PVC, and improve its thermal stability, dimensional stability and aging resistance. At present, the use of inorganic mineral powders to prepare PVC composite materials has become a hot spot for PVC modification and processing. [0003] The chemical composition of diatomaceous earth is mainly silicon dioxide, and a small amount of ferric oxide, aluminum oxide, calcium...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L83/04C08L51/04C08K13/06C08K9/04C08K3/34C08K3/26C08K3/22B29C47/92B29C48/92
Inventor 资于明朱正华黄仁军
Owner SUZHOU RONGCHANG COMPOUND MATERIAL
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