Preparation method of lightweight polypropylene material

A polypropylene material and lightweight technology, applied in the field of polypropylene materials, can solve the problems of low decomposition starting temperature, difficulty in meeting the production requirements of polypropylene foam materials, wide decomposition temperature range, etc., so as to improve the compatibility and reduce the Decomposition temperature range, the effect of improving the effect

Active Publication Date: 2019-07-26
SUZHOU RUNJIA ENGINEER PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the decomposition initiation temperature of sodium bicarbonate is low (begins to decompose at about 60°C), the decomposition temperature range is wide, and a large amount of volatilization occurs before the softening temperature of polypropylene, which is difficult to meet the production requirements of polypropylene foam materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The invention provides a kind of preparation method of lightweight polypropylene material, comprises the following steps:

[0023] (1) Weigh 12 parts by mass of sodium bicarbonate and 28 parts by mass of citric acid; mix the two and infiltrate them in 100 parts by mass of ethanol, then mix them evenly with ultrasonic waves, spin dry them by spin coating, and dry them in vacuum for 0.5h , to remove the organic solvent to obtain a microcellular foaming agent for polypropylene; citric acid can increase the thermal decomposition initiation temperature of sodium bicarbonate, and citric acid itself also has a foaming effect, which is conducive to improving the microcellular foaming agent for polypropylene The foaming effect of the agent;

[0024] (2) Weigh 75 parts by mass of silicone oil (molecular weight 1-100,000), add 25 parts by mass of the microcellular foaming agent for polypropylene prepared in step (1), and then ultrasonicate and stir at a speed of 100rpm, The mixin...

Embodiment 2

[0031] The invention provides a kind of preparation method of lightweight polypropylene material, comprises the following steps:

[0032] (1) Weigh 15 parts by mass of sodium bicarbonate and 21 parts by mass of citric acid; mix the two and infiltrate them in 100 parts by mass of ethanol, then mix them evenly with ultrasonic waves, spin dry them by spin coating, and dry them in vacuum for 0.2h , remove the organic solvent to obtain the microcellular foaming agent for polypropylene;

[0033] (2) Weigh 80 parts by mass of silicone oil (molecular weight 1-100,000), add 20 parts by mass of the microcellular foaming agent for polypropylene prepared in step (1), and then ultrasonicate and stir at a speed of 150rpm, The mixing time is 12 hours; vacuum drying for 100 minutes after vacuum filtration to obtain a microporous foaming agent for silicone-coated polypropylene;

[0034] (3) Weigh 2 parts by mass of the microcellular foaming agent for silicone-coated polypropylene prepared in ...

Embodiment 3

[0040] The invention provides a kind of preparation method of lightweight polypropylene material, comprises the following steps:

[0041] (1) Weigh 9 parts by mass of sodium bicarbonate and 35 parts by mass of citric acid; mix the two and infiltrate them in 100 parts by mass of ethanol, then mix them evenly with ultrasonic waves, spin dry them by spin coating, and dry them in vacuum for 1 hour. Remove the organic solvent to obtain a microcellular foaming agent for polypropylene;

[0042] (2) Weigh 70 parts by mass of silicone oil (molecular weight 1-100,000), add 30 parts by mass of the microcellular foaming agent for polypropylene prepared in step (1), and then ultrasonicate and stir at a speed of 80rpm, The mixing time is 24 hours; vacuum drying for 50 minutes after vacuum filtration to obtain a microporous foaming agent for silicone-coated polypropylene;

[0043] (3) Weigh 4.5 parts by mass of the microcellular foaming agent for silicone-coated polypropylene prepared in st...

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Abstract

The invention relates to a preparation method of a lightweight polypropylene material. The preparation method includes the steps: (1) uniformly mixing sodium bicarbonate and citric acid to obtain a micro-porous foaming agent for polypropylene; (2) wrapping the micro-porous foaming agent for the polypropylene by silicone oil to obtain a micro-porous foaming agent for organic silicon wrapped polypropylene; (3) uniformly mixing the micro-porous foaming agent for the organic silicon wrapped polypropylene, the polypropylene, fillers, antioxidants, heat stabilizers and microcapsule erythritol to obtain a finished product. According to the method, the citric acid and the microcapsule erythritol are added, the initial thermal decomposition temperature of the sodium bicarbonate is improved, a decomposition temperature interval is reduced, foaming effects are improved, an erythritol material is an excellent middle temperature phase-change material, and phase-change temperature is 119-124 DEG C.When the temperature rises to exceed the phase-change temperature, phase-change of the erythritol is implemented, heat is slowly absorbed / temperature rise is prevented, so that thermal decomposition of the sodium bicarbonate serving as a foaming agent is delayed, and foaming effects are improved.

Description

technical field [0001] The invention relates to the field of polypropylene materials, in particular to a preparation method of lightweight polypropylene materials. Background technique [0002] Lightweight, energy saving and environmental protection, as well as high-efficiency and low-cost production have always been the goals that the automotive industry continues to pursue. Because polypropylene is a material with high cost performance, its application in automotive plastic parts has been continuously expanded, and it has been widely used in bumpers, automotive dashboards, door panels, and central passages. , decorative pillars, trunks and other major automotive plastic parts. [0003] However, since polypropylene materials began to replace expensive engineering plastics or bulky metal materials, after decades of technological development, this alternative work can be said to be gradually approaching the extreme to some extent, short-term From the perspective of material...

Claims

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Application Information

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IPC IPC(8): C08J9/08C08L23/12C08K9/10C08K3/34C08K5/053
CPCC08J9/08C08J9/009C08J9/0023C08J2203/02C08J2323/12
Inventor 汪理文李庆贵刘正军牛国增沈安平翁永华
Owner SUZHOU RUNJIA ENGINEER PLASTIC
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