Unlock instant, AI-driven research and patent intelligence for your innovation.

Modified foaming agent of polypropylene foaming material and preparation method modified foaming agent

A foaming material and foaming agent technology, applied in the field of chemical materials, can solve problems such as unsatisfactory effects, and achieve the effects of cell size, narrow decomposition temperature range, and high uniformity

Inactive Publication Date: 2014-06-25
SUZHOU RUNJIA ENGINEER PLASTIC
View PDF2 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Cao Xianwu [1] used stearic acid and erucic acid as modifiers to modify sodium bicarbonate, which increased the thermal decomposition temperature and narrowed the decomposition temperature range to a certain extent, but the effect was still not ideal

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Modified foaming agent of polypropylene foaming material and preparation method modified foaming agent
  • Modified foaming agent of polypropylene foaming material and preparation method modified foaming agent
  • Modified foaming agent of polypropylene foaming material and preparation method modified foaming agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step (1): Weigh 50g of anhydrous citric acid granules, add them to a stirring container containing 500ml of absolute ethanol solution, and start stirring until the citric acid is completely dissolved.

[0025] Step (2): After sieving the sodium bicarbonate powder through a 100-mesh standard sieve, weigh 100g of the sieved material, add it to the container of step (1), adjust the temperature to 60°C, and fully stir until it is dry in the beaker. After the ethanol is completely volatilized, the modified sodium bicarbonate powder is obtained after a little grinding.

[0026] Step (3): Preparation of foam masterbatch: according to the following ratio (mass percentage): low-density polyethylene (LDPE) 50%, EVA 20%, modified sodium bicarbonate 20%, zinc stearate (ZnSt) 5% and ultrafine calcium carbonate (CaCO 3 ) 5%, pelletized in a plastic pelletizer at 120°C.

[0027] Step (4): Preparation of polypropylene foam material: according to the following proportion (mass percent...

Embodiment 2

[0031] Step (1): Weigh 100g of anhydrous citric acid granules, add them to a stirring container containing 500ml of absolute ethanol solution, and start stirring until the citric acid is completely dissolved.

[0032] Step (2): After sieving the sodium bicarbonate powder through a 100-mesh standard sieve, weigh 100g of the sieved material, add it to the container of step (1), adjust the temperature to 60°C, and stir until there is no water in the beaker. After the ethanol is completely volatilized, the modified sodium bicarbonate powder is obtained after a little grinding.

[0033] Step (3): Preparation of foam masterbatch: according to the following ratio (mass percentage): low-density polyethylene (LDPE) 50%, EVA 20%, modified sodium bicarbonate 20%, zinc stearate (ZnSt) 5% and ultrafine calcium carbonate (CaCO 3 ) 5%, pelletized in a plastic pelletizer at 120°C.

[0034] Step (4): Preparation of polypropylene foam material: according to the following proportion (mass perc...

Embodiment 3

[0038] Step (1): Weigh 150g of anhydrous citric acid granules, add them to a stirring container containing 500ml of absolute ethanol solution, and start stirring until the citric acid is completely dissolved.

[0039] Step (2): After sieving the sodium bicarbonate powder through a 100-mesh standard sieve, weigh 100g of the sieved material, add it to the container of step (1), adjust the temperature to 60°C, and stir until there is no water in the beaker. After the ethanol is completely volatilized, the modified sodium bicarbonate powder is obtained after a little grinding.

[0040] Step (3): Preparation of foam masterbatch: according to the following ratio (mass percentage): low-density polyethylene (LDPE) 50%, EVA 20%, modified sodium bicarbonate 20%, zinc stearate (ZnSt) 5% and ultrafine calcium carbonate (CaCO 3 ) 5%, pelletized in a plastic pelletizer at 120°C.

[0041] Step (4): Preparation of polypropylene foam material: according to the following proportion (mass perc...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Densityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a modified foaming agent of a polypropylene foaming material and a preparation method of the modified foaming agent. The foaming agent comprises sodium bicarbonate and citric acid in a weight ratio of 1:(0.2-2), and the outside of the sodium bicarbonate is coated with citric acid through a solution coating method. Compared with pure sodium bicarbonate, modified sodium bicarbonate has the advantages that the decomposition temperature is remarkably increased, the decomposition temperature range is smaller, the sodium bicarbonate is favorably rapidly decomposed, and is closer to the polypropylene processing forming temperature and foaming process requirements; the prepared polypropylene foaming material has the advantages of proper foam hole size and high uniformity. In addition, raw materials used in the preparation method and decomposition products are nontoxic and harmless substances, and are good in application prospect in fields of automobiles, articles of daily use, and the like.

Description

technical field [0001] The invention relates to a foaming agent and a preparation method thereof, in particular to a modified foaming agent for polypropylene foam material and a preparation method thereof, belonging to the technical field of chemical materials. Background technique [0002] Polypropylene material has good comprehensive mechanical properties, high heat distortion temperature, good chemical stability, easy processing, and low cost, so it is widely used in the fields of automobiles, home appliances, chemicals, and packaging. Since expanded polypropylene has better performance than expanded polystyrene, it tends to replace expanded polystyrene in the packaging field. [0003] The softening temperature of polypropylene is relatively high, and the blowing agents used are mainly compounds such as azodicarbonamide (AC) and azobisisobutyronitrile (AIBN) with a decomposition temperature of about 200 ° C. Now supercritical carbon dioxide (scC0 2 ) of expanded polyprop...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08L23/12C08J9/08
CPCC08L23/12C08J9/08C08J2203/02C08J2323/12
Inventor 汪理文姚斯嘉翁永华周竹发丁贤麟
Owner SUZHOU RUNJIA ENGINEER PLASTIC