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Method for using ardealite as polyvinyl chloride soft sectional material packing

A technology of polyvinyl chloride and soft profiles, applied in the direction of fibrous fillers, chemical instruments and methods, inorganic pigment treatment, etc., which can solve the problems of poor compatibility, the influence of polyvinyl chloride heat stability, and the processing performance of fillers Problems such as adverse effects on application performance, etc., to achieve the effect of simple process, improved flexural and cracking strength and elastic modulus, and low cost

Inactive Publication Date: 2016-03-16
GUIZHOU KAILIN GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, phosphogypsum has the characteristics of a typical flaky filler. As a filler, its role in plastics is mainly to increase the cost and reduce the cost. It can also be used to improve the elastic modulus, impact strength and bending strength of the conforming system. However, the application of phosphogypsum as a new type of filler in plastics, especially in polyvinyl chloride soft materials, has the following disadvantages: one is that phosphogypsum contains a variety of impurities because it contains unreacted sulfuric acid and residual Phosphogypsum is acidic due to phosphoric acid and hydrofluoric acid, and directly using phosphogypsum as a polyvinyl chloride filler will affect the thermal stability of polyvinyl chloride; second, the polarity of inorganic fillers is very different from that of polymers. It is easy to cause poor compatibility between the two, which will adversely affect the processing performance of the filler and the application performance of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Step 1: Emulsifier preparation

[0024] Select liquid paraffin with a water-to-oil ratio of 3.5, and mix evenly with sorbitan monooleate at a mass ratio of 10:3.

[0025] Step 2: Filler preparation

[0026] Grind 1 kg of phosphogypsum into particles with a particle size of 66 μm, pass in saturated water vapor, and conduct heat treatment at a constant temperature of 155°C for 2 hours to obtain α-type hemihydrate gypsum; After stirring evenly, emulsify at a temperature of 68-70°C for 20 minutes, then add 0.24 kg of sodium carboxymethyl cellulose for stirring at a stirring rate of 700 r / min, and obtain carboxyl groups used as fillers for polyvinyl chloride soft profiles. Complex type phosphogypsum filler.

Embodiment 2

[0028] Step 1: Emulsifier preparation

[0029] Select liquid paraffin with a water-to-oil ratio of 3, and mix it with sorbitan monooleate at a mass ratio of 2:1.

[0030] Step 2: Filler Preparation

[0031] Grind 3kg of phosphogypsum into particles with a particle size of 80μm, pass in saturated water vapor, and conduct heat treatment at a constant temperature of 160°C for 1.5h to obtain α-type hemihydrate gypsum; add 0.9kg of emulsifier, and stir at a rate of 800r / min After stirring evenly at high temperature, emulsify at a temperature of 63-67°C for 30 minutes, then add 0.68kg of sodium carboxymethylcellulose and stir at a stirring rate of 900r / min to obtain polyvinyl chloride soft profile filler Carboxyl complex type phosphogypsum filler

Embodiment 3

[0033] Step 1: Emulsifier preparation

[0034] Select liquid paraffin with a water-to-oil ratio of 4, and mix evenly with sorbitan monooleate in a mass ratio of 5:2.

[0035] Step 2: Filler Preparation

[0036] Grind 1 kg of phosphogypsum into particles with a particle size of 72 μm, pass through saturated water vapor, and conduct heat treatment at a constant temperature of 150 ° C for 1 hour to obtain α-type hemihydrate gypsum; After stirring evenly, emulsify at a temperature of 60-65°C for 25 minutes, then add 0.26 kg of sodium carboxymethyl cellulose for stirring at a stirring rate of 700 r / min, and obtain carboxyl groups used as fillers for polyvinyl chloride soft profiles. Complex type phosphogypsum filler.

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Abstract

The invention relates to the technical field of ardealite treatment, in particular to a method for using ardealite as polyvinyl chloride soft sectional material packing. The ardealite is ground into particulate matter with a particle size of 66-80 [mu]m and is led into saturated steam to undergo heat treatment for 1-2 h, and alpha type semi-hydrated gypsum is acquired; the alpha type semi-hydrated gypsum is evenly stirred with an emulsifier according to a mass ratio of 10:3 and then is emulsified at 60-70 DEG C, sodium carboxymethyl cellulose is added and stirring is performed, and carboxyl complexing type ardealite packing used as the polyvinyl chloride soft sectional material packing is obtained. The method is simple in process and low in cost, the plasticization of ardealite in a polyvinyl chloride soft sectional material can be accelerated in the processing process, the liquidity between the packing and polyvinyl chloride macromolecules is good, the packing is easy to form, the performance of the packing is brought into full play, the fracture resistance and elasticity modulus of the polyvinyl chloride soft sectional material are improved, and the packing can be used for the polyvinyl chloride soft sectional material.

Description

technical field [0001] The invention relates to the technical field of phosphogypsum treatment, in particular to a method for using phosphogypsum as a filler for polyvinyl chloride soft profiles. Background technique [0002] Phosphogypsum is the solid waste of the phosphate fertilizer industry. At present, according to relevant statistical data, the total amount of phosphogypsum stockpiled in my country has reached more than 250 million tons, and the annual new discharge of phosphogypsum is also more than 50 million tons. Rapid growth and massive accumulation not only occupy land resources and cause environmental pressure, but also increase the economic burden of enterprises and the pressure of national economic construction in our country. Therefore, speeding up the technological innovation of comprehensive utilization of phosphogypsum and realizing turning waste into treasure and harm into benefit has become an important technical and economic policy in my country's econom...

Claims

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Application Information

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IPC IPC(8): C09C1/02C09C3/00C09C3/08C09C3/10C08L27/06C08K9/04C08K3/30
Inventor 杨永彬杨步雷向前勇王伟李泽钢
Owner GUIZHOU KAILIN GRP CO LTD