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

Stress-whitening-resisting modified polypropylene resin and preparation method thereof

A polypropylene resin and stress-resistant technology, which is applied in the field of stress-whitening-resistant polypropylene resin and its preparation, can solve problems such as poor stress crack resistance, reduced elongation at break, and impact on product use, and achieve production efficiency High efficiency, simple process and stable product quality

Inactive Publication Date: 2017-05-24
HEFEI GENIUS NEW MATERIALS
View PDF1 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Stress whitening of the product not only affects its appearance, but also leads to lower elongation at break, lower strength and poor stress cracking resistance of the product, which seriously affects the use of the product

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
  • Stress-whitening-resisting modified polypropylene resin and preparation method thereof
  • Stress-whitening-resisting modified polypropylene resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Mix 85 parts of polypropylene resin, 15 parts of superfine talc powder (6000 mesh), 5 parts of glass fiber, 0.2 part of antioxidant 1010, 0.3 part of light and heat stabilizer (antioxidant 1076: antioxidant 168= 1:2, mass ratio) and 0.1 part of lubricant stearic acid amide (SR) are mixed evenly by high-speed stirring;

[0035] (2) Send the above mixture into a twin-screw extruder to extrude and granulate to obtain polypropylene resin;

[0036] The screw temperature of the twin-screw extruder is 220° C.; the screw speed is 100 r / min.

[0037] The prepared compound was injection-molded into a standard sample bar for testing according to the standard size, and the performance test results are shown in Table 2.

Embodiment 2

[0039] (1) Mix 98 parts of polypropylene, 2 parts of superfine talc powder (7000 mesh), 10 parts of glass fiber, 0.5 part of antioxidant 1010, 0.6 part of light and heat stabilizer (antioxidant DLTP: antioxidant DBTL=1 : 1, mass ratio) and 0.5 parts of lubricant silicone oil are mixed evenly by high-speed stirring;

[0040] (2) Send the above mixture into a twin-screw extruder to extrude and granulate to obtain polypropylene resin;

[0041] The screw temperature of the twin-screw extruder is 230° C.; the screw speed is 200 r / min.

[0042] The prepared compound was injection-molded into a standard sample bar for testing according to the standard size, and the performance test results are shown in Table 2.

Embodiment 3

[0044] (1) Mix 90 parts of polypropylene resin, 10 parts of superfine talc powder (6000 mesh), 30 parts of glass fiber, 1 part of antioxidant 1010, 0.1 part of light and heat stabilizer (DLTP: 2,6-tertiary butyl -4-Methylphenol=2:1, mass ratio) and 1 part of lubricant EBS are mixed evenly by high-speed stirring;

[0045] (2) Send the above mixture into a twin-screw extruder to extrude and granulate to obtain polypropylene resin;

[0046] The screw temperature of the twin-screw extruder is 240° C.; the screw speed is 400 r / min.

[0047] The prepared compound was injection-molded into a standard sample bar for testing according to the standard size, and the performance test results are shown in Table 2.

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

No PUM Login to View More

Abstract

The invention discloses stress-whitening-resisting modified polypropylene resin. The resin is prepared from, by mass, 80-98 parts of polypropylene resin, 2-20 parts of superfine talcum powder, 5-30 parts of glass fibers, 0.2-1 part of antioxygen, 0.1-1 part of photo-thermal stabilizer and 0.1-1 part of lubricating agent. The superfine talcum powder is selected, due to the fact that the superfine talcum powder is high in activity, the superfine talcum powder and the polypropylene resin can be easily combined into an island structure, a large number of small cracks formed when the resin generates silver cracks under the action of external force can be absorbed, the cracks are prevented from further developing, and then the stress whitening phenomenon of the polypropylene resin can be relieved or stopped. The prepared material is good in mechanical performance and has the advantages of being easy to process and form and the like, especially the stress-whitening-resisting phenomenon of the material is controlled, and the resin can be used for the product occasion that various materials required to keep the appearances and the like under the condition of bearing external force many times are formed.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a stress-whitening-resistant polypropylene resin and a preparation method thereof. Background technique [0002] At present, polypropylene resin is a very commonly used polymer material, and its application range is very wide. However, when its products are subjected to external forces such as stretching, bending, and impact during use, local whitening often occurs. Said stress whitish. Stress whitening of the product not only affects its appearance, but also leads to a decrease in the elongation at break, a decrease in strength, and a deterioration in stress cracking resistance, which seriously affects the use of the product. At present, the more common solution to the stress whitening of polypropylene resin products is to heat-treat the products, that is, to place the products under certain temperature conditions for post-treatment to eliminate their inte...

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): C08L23/12C08L91/06C08K13/04C08K7/14C08K3/34C08K5/134C08K5/20C08K5/526C08K5/57
CPCC08L23/12C08K3/34C08K5/13C08K5/1345C08K5/20C08K5/372C08K5/526C08K7/14C08K13/04C08K2201/003C08K2201/014C08L2205/025C08L2205/03C08L83/04C08K5/57C08L91/06
Inventor 杨桂生李晓庆
Owner HEFEI GENIUS NEW MATERIALS