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Stress-whitening resistant styrene-based resin and preparation method thereof

A styrene-based resin and stress-resistant technology, which is applied in the field of stress-whitening-resistant styrene-based resin and its preparation, can solve problems such as the general effect of internal stress relief, and achieve the prevention of stress-whitening phenomenon, stable product quality, and smooth process simple effect

Inactive Publication Date: 2018-01-05
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the structure of the product itself is relatively complicated by this method, the effect of internal stress relief is relatively general.

Method used

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  • Stress-whitening resistant styrene-based resin and preparation method thereof
  • Stress-whitening resistant styrene-based resin and preparation method thereof
  • Stress-whitening resistant styrene-based resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) 85 parts of ABS 8434 resin, 15 parts of superfine calcium carbonate (6000 mesh), 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) is mixed evenly by high-speed stirring;

[0042] (2) sending the above-mentioned mixture into a twin-screw extruder to extrude and granulate to obtain a styrene-based resin;

[0043] In the described step (2), the screw temperature of the twin-screw extruder is 400r / min.

[0044] 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

[0046] (1) Mix 98 parts of ABS8434 and ASA PW-957 resin mixture (ABS8434:ASA PW-957=2:1, mass ratio), 2 parts of superfine calcium carbonate (7000 mesh), 0.6 parts of light and heat stabilizer (DLTP : DBTL=1:1, mass ratio) and 0.5 parts of lubricant silicone oil are mixed evenly by high-speed stirring;

[0047] (2) sending the above-mentioned mixture into a twin-screw extruder to extrude and granulate to obtain a styrene-based resin;

[0048] In the described step (2), the screw temperature of the twin-screw extruder is 500r / min.

[0049] 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

[0051] (1) 90 parts of ASA PW-957 resin, 10 parts of superfine calcium carbonate (6000 mesh), 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;

[0052] (2) sending the above-mentioned mixture into a twin-screw extruder to extrude and granulate to obtain a styrene-based resin;

[0053] In the described step (2), the screw temperature of the twin-screw extruder is 300r / min.

[0054] 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.

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PUM

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Abstract

The invention discloses stress-whitening resistant styrene-based resin. The stress-whitening resistant styrene-based resin is prepared from the following components: by weight, 80-98 parts of styrene-based resin, 2-20 parts of ultrafine calcium carbonate, 0.1-1 part of photothermal stabilizer and 0.1-1 part of lubricant. The invention also discloses a preparation method of the stress-whitening resistant styrene-based resin. The stress-whitening resistant styrene-based resin prepared by using the method has the advantages of being good in mechanical performance, easy to process for forming andthe like, and particularly the stress-whitening phenomenon of the stress-whitening resistant styrene-based resin can be controlled; thus, the stress-whitening resistant styrene-based resin can be usedfor forming of products which are required to maintain the appearance after external force is applied for multiple times in various places; in the invention, the ultrafine calcium carbonate is selected because the ultrafine calcium carbonate has high activity and can easily combine with the styrene-based resin to obtain a sea island structure, and lots of tiny cracks generated by crazes which arecaused by the external force applied on the styrene-based resin can be absorbed and reduced so as to prevent further development of the cracks, so that the stress-whitening phenomenon of the styrene-based resin further slows down or is prevented.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a styrene-based resin resistant to stress whitening and a preparation method thereof. Background technique [0002] Styrene-based resin is a very commonly used polymer material with a wide range of applications, but its products often appear local whitening when they are subjected to external forces such as stretching, bending, and impact during use, that is, We call stress blanching. The stress whitening of the product not only affects its appearance, but also leads to a decrease in the elongation at break, a decrease in the strength, and a deterioration in the stress cracking resistance of the product. In severe cases, it will affect the use of the product. At present, the more common solution to the stress whitening of styrene-based resin products is to heat-treat the products, that is, to place the products under certain temperature conditions for post-...

Claims

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Application Information

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IPC IPC(8): C08L55/02C08L33/20C08L51/04C08K13/02C08K3/26B29C47/92B29C48/92
Inventor 杨桂生李晓庆乐俊姚晨光
Owner HEFEI GENIUS NEW MATERIALS
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