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A kind of high-transparency plastic particle for shoemaking and preparation process thereof

A technology of transparent plastics and particles, applied in the field of plastics, can solve the problems of reduced transparency of finished products, affecting the refractive index of visible light of finished products, etc., to achieve the effect of improving transparency, excellent transparency, and reducing the content of double bonds

Active Publication Date: 2022-07-15
杭州富阳龙翔塑料制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] When PVC monomers are used to prepare PVC plastics that require high transparency, the PVC matrix resin will decompose to a certain extent due to heat during processing, releasing hydrogen chloride and generating unsaturated double bonds. These unsaturated double bonds will affect The refractive index of the finished product to visible light, thereby reducing the transparency of the finished product

Method used

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  • A kind of high-transparency plastic particle for shoemaking and preparation process thereof
  • A kind of high-transparency plastic particle for shoemaking and preparation process thereof
  • A kind of high-transparency plastic particle for shoemaking and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1: a kind of high-transparency plastic particles for shoemaking,

[0043] Prepared from the following raw materials: PVC matrix powder 50kg, DOTP 50kg, thermal stabilizer 1kg, lauric acid 0.3kg, thermal stabilizer are specifically thiol methyl tin 0.4kg, zinc stearate 0.4kg and hydrotalcite 0.2kg, The particle size of the PVC matrix powder used is 150-200 μm.

[0044] Prepared by the following steps:

[0045] S1: The PVC matrix powder, DOTP, heat stabilizer and lauric acid are sent into the stirring tank and mixed evenly to obtain a raw material mixture;

[0046] S2: feed 0.7kg of Raney nickel into the reaction kettle, and feed nitrogen into the reaction kettle to purge the internal air, then uniformly feed the mixed gas of hydrogen and nitrogen into the raw material mixture, and the hydrogen concentration is 50%, The control pressure is 4MPa, the raw material mixture is heated and further mixed under the condition of 130 ° C, and the mixture is continued f...

Embodiment 2-6

[0049] Embodiment 2-6: a kind of high-transparency plastic particles for shoemaking,

[0050] The difference from Example 1 is that the dosage of each component is different, and the specific dosage is shown in Table 1 below.

Embodiment 7

[0051] Embodiment 7: a kind of high-transparency plastic particles for shoemaking,

[0052] The difference from Example 1 is that the raw material also includes epoxidized soybean oil, and the consumption of each component is shown in Table 1 below;

[0053] In step S1, the epoxidized soybean oil, the PVC matrix powder, the DOTP, the heat stabilizer and the lauric acid are sent into the stirring tank for mixing.

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Abstract

The application relates to the technical field of plastics, and specifically discloses a kind of high-transparency plastic particles for shoemaking and a preparation process thereof, which are mainly prepared from the following raw materials by mass: 50-100 parts of PVC matrix powder, 1-3 parts of stabilizer, 0.2-0.4 part of lauric acid, and the thermal stabilizer specifically includes methyl tin mercaptide, zinc stearate and hydrotalcite. The preparation method is as follows: S1: send PVC matrix powder, DOTP, thermal stabilizer and lauric acid into the reaction kettle; S2: send Raney nickel into the reaction kettle, and feed nitrogen into the reaction kettle to remove the air inside the reaction kettle. Discharge, uniformly feed the mixed gas of hydrogen and nitrogen into the raw material mixture, then heat the raw material mixture and further mix; S3: filter the molten mixture, cool the molten mixture slightly, and then send the mixture into the screw extruder S4: After extrusion, granulation, cyclone separation, and vibrating sieve are carried out in sequence, and finally product granules are obtained. The plastic particle product prepared in the present application has the advantage of high transparency.

Description

technical field [0001] The present application relates to the technical field of plastics, in particular to a high-transparency plastic particle for shoemaking and a preparation process thereof. Background technique [0002] Polyvinyl chloride, abbreviated as PVC in English, is a polymer formed by the polymerization of vinyl chloride monomer in peroxides, azo compounds and other initiators; or under the action of light and heat according to the mechanism of free radical polymerization. Pure PVC monomer is a white powder with an amorphous structure, with a small degree of branching, a glass transition temperature of 77-90 °C, easy to decompose at around 170 °C, and poor stability to light and heat. When exposed to sunlight for a long time, it will decompose to produce hydrogen chloride, and further autocatalytic decomposition will cause discoloration and rapid decline in physical and mechanical properties. [0003] Existing PVC finished products are pure PVC powder mixed wit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08L91/00C08K13/02C08K5/12C08K5/09C08K5/098C08K3/26C08K5/58C08K5/13
CPCC08L27/06C08K13/02C08K5/12C08K5/09C08K5/098C08K3/26C08K5/58C08K5/13C08L2201/08C08L2201/10C08L91/00
Inventor 谢利民江飞江其
Owner 杭州富阳龙翔塑料制品有限公司