Application of styrene-based elastomer as an additive to improve low-temperature folding resistance of polypropylene and its preparation of folding-resistant polypropylene

A styrene and elastomer technology, applied in the field of polymer material molding and processing, can solve the problems of poor low-temperature folding resistance, loss of transparency and folding resistance, and achieve the effects of excellent transparency and excellent low-temperature folding resistance.

Active Publication Date: 2017-01-11
TIANJIN KINGFA NEW MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the low-temperature folding resistance of existing polypropylene with toughening agents is still not good, and some polypropylenes with toughening agents even lose both transparency and original folding resistance at low temperatures.

Method used

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  • Application of styrene-based elastomer as an additive to improve low-temperature folding resistance of polypropylene and its preparation of folding-resistant polypropylene
  • Application of styrene-based elastomer as an additive to improve low-temperature folding resistance of polypropylene and its preparation of folding-resistant polypropylene
  • Application of styrene-based elastomer as an additive to improve low-temperature folding resistance of polypropylene and its preparation of folding-resistant polypropylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] 94.6 kg of polypropylene PP RP346R, 5 kg of styrene-based elastomer SEPTON 2002, 0.2 kg of heat stabilizer 1010, and 0.2 kg of heat stabilizer 168 were melted, mixed and dispersed in a twin-screw extruder with a length-to-diameter ratio of 40:1. The temperature of each section of the extruder is set at 220~260°C, extruded and granulated, and finally the product is obtained.

[0057] Test its performance according to the corresponding standards, the list is as follows:

[0058]

Embodiment 2

[0060]69.4 kg of polypropylene PP RP346R, 20 kg of polypropylene PP S700, 10 kg of styrene-based elastomer SEPTON 2063, 0.3 kg of heat stabilizer 1010, and 0.3 kg of heat stabilizer 168 were extruded in a twin-screw extruder with an aspect ratio of 40:1 Melt, mix and disperse in the extruder, set the temperature of each section of the extruder at 220~260°C, extrude and granulate, and finally get the product.

[0061] Test its performance according to the corresponding standards, the list is as follows:

[0062]

Embodiment 3

[0064] Extrude 54.1 kg of polypropylene PP SM256, 30 kg of polypropylene PP T30S, 15 kg of styrenic elastomer SEBS6006, 0.5 kg of heat stabilizer 1010, and 0.4 kg of heat stabilizer 168 in a twin-screw with an aspect ratio of 40:1 Melt, mix and disperse in the machine, set the temperature of each section of the extruder at 220~260°C, extrude and granulate, and finally get the product.

[0065] Test its performance according to the corresponding standards, the list is as follows:

[0066]

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Abstract

The invention discloses an application of styrene elastomers as additives for improving low-temperature folding resistance of polypropylene and folding resistant polypropylene prepared from the styrene elastomers. The inventor finds out that the styrene elastomers have excellent compatibility with the polypropylene, and minimum in phase size in the polypropylene matrix, and the polypropylene added with the styrene elastomers still has excellent light transmission property and folding resistance at a low temperature. The folding resistant polypropylene has the tensile strength of greater than or equal to 20MPa, the elongation at break of greater than or equal to 500%, the notch impact strength (23 DEG C) of greater than or equal to 15KJ / m<2>, the hinge (0.5mm) folding count at 23 DEG C of greater than or equal to 106, the hinge (0.5mm) folding count at minus 30 DEG C of greater than or equal to 105, and the light transmittance of greater than or equal to 90%, and thus is capable of meeting the requirements for the transparent folding-resistant polypropylene in cold regions.

Description

technical field [0001] The invention belongs to the field of polymer material molding and processing, and in particular relates to the application of a styrene-based elastomer as an additive for improving the low-temperature folding resistance of polypropylene and the prepared folding-resistant polypropylene. Background technique [0002] Polypropylene, commonly known as pleated glue, has the advantages of rich raw material sources, good comprehensive mechanical properties, high cost performance, environmental protection, non-toxicity, and easy recycling. Many daily necessities are gradually using polypropylene for injection molding. With the improvement of polypropylene synthesis level, transparent folding-resistant polypropylene tends to gradually replace traditional transparent materials such as polystyrene, K resin and PC, and has been widely used in injection molded products with hinged structures. [0003] However, the traditional transparent folding-resistant polyprop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L23/14C08L53/02
CPCC08L23/14C08L2205/03C08L2207/14C08L53/025C08L23/12C08L53/02
Inventor 李欣叶丹滢张春怀李晟陈国雄李东宋晓东
Owner TIANJIN KINGFA NEW MATERIAL
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