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Special PVC pipe calcium and preparation method thereof

A PVC pipe and calcite technology, applied in chemical instruments and methods, fibrous fillers, dyeing and physical treatment, etc., can solve the problems of small addition amount and poor direct application effect, and achieve large addition amount, excellent performance and reduce production. cost effect

Inactive Publication Date: 2017-12-22
GUANGDONG YUFENG POWDER MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a kind of special calcium for PVC pipes and preparation method thereof, aim to provide a kind of calcium carbonate powder that is applicable to PVC pipes, solve the problem of existing common calcium carbonate powder in the production of PVC pipes. There is a problem that the amount of addition is small and the effect of direct application is not good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] S1. Selection of raw materials: Select high-quality calcite with a calcium content of more than 98%.

[0040] S2. Cleaning the raw materials: cleaning the calcite and air-drying.

[0041] S3, the first coarse crushing: crush the calcite to a size of 3-5 cm, rinse with water, and dry

[0042] S4. The second crushing check: send the calcite to the hammer crusher, and crush the calcite to within 5 meshes.

[0043] S5. Ultrafine grinding: Ultrafine grinding is performed on the calcite until the fineness D97 is 4.5 μm.

[0044] S6. Continue grinding and add coupling agent: add coupling agent to the powder and grind for 10-20 minutes. The coupling agent is a magnesium coupling agent.

[0045]S7. Add lubricant and plasticizer in turn to the powder: add lubricant and plasticizer in turn, and grind for 10-30 minutes. The lubricant is magnesium stearate, and the plasticizer is 2-ethylhexyl phosphate. Calculated by weight percentage, the amount of the calcite accounts for 99....

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Abstract

The present invention discloses special PVC pipe calcium and a preparation method thereof, the special PVC pipe calcium is calcium carbonate powder prepared from calcite, and the preparation method includes the following concrete steps: S1, selection of calcite with the calcium content of 98% or more; S2, raw material cleaning ; S3, first coarse crushing; S4 secondary crushing and reselecting; S5, ultrafine grinding; S6, further grinding, and adding of a coupling agent; and S7, successive adding of a lubricant and a plasticizer in powder. The special PVC pipe calcium is prepared by modifying and improving by use of a variety of additives on the basis of characteristics of PVC pipes, and has excellent performance, large added amount, low cost and other advantages.

Description

technical field [0001] The invention relates to the field of industrial fillers, and mainly relates to special calcium for PVC pipes and a preparation method thereof. Background technique [0002] As a filler for rubber and plastic products, calcium carbonate can improve the heat resistance, wear resistance, dimensional stability, rigidity and processability of the product, and reduce the cost of the product, but its surface has hydroxyl groups with strong hydrophilicity. It shows a strong alkalinity. This hydrophilic and oleophobic property makes the affinity between calcium carbonate and organic polymers poor, and it is easy to form aggregates, resulting in uneven dispersion in the polymer, resulting in a gap between the two materials. Interface defects, direct application effect is not good. And calcium carbonate is used as a filler, and its acid resistance, smoothness, whiteness and other properties need to be further improved. Therefore, if ordinary calcium carbonate ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/02C09C3/04C09C3/08C08L27/06C08L23/28C08L23/30C08K9/04C08K3/26
CPCC09C1/021C01P2006/22C08K2003/265C08L27/06C08L2203/18C08L2205/03C09C3/006C09C3/041C09C3/08C08L23/286C08L23/30C08K9/04C08K3/26
Inventor 李斌
Owner GUANGDONG YUFENG POWDER MATERIAL
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