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Polypropylene (PP) alloy material with low molding shrinkage and preparation method thereof

An alloy material, polypropylene technology, applied in the field of polypropylene alloy material and its preparation, can solve rare problems, achieve the effects of improving tensile strength, superior surface gloss, and realizing general-purpose plastic engineering

Active Publication Date: 2012-03-28
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, the application of inorganic fillers and SEBS synergistic modification to prepare high-performance PP alloy materials is rare.

Method used

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  • Polypropylene (PP) alloy material with low molding shrinkage and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The concrete preparation formula of polypropylene alloy material of the present invention is as shown in table 1, and implementation steps are as follows:

[0040] The SEBS product is crushed into SEBS powder, and the impact copolymerized polypropylene resin EPC30R-H is crushed into powder.

[0041] 10 parts of SEBS powder, 70 parts of impact copolymer polypropylene resin EPC30R-H, 5 parts of compatibilizer grafted maleic anhydride polypropylene (PP-MAH), grafted stearyl methacrylate basic magnesium sulfate 10 parts of whiskers, 10 parts of grafted ethyl methacrylate talcum powder, 1000ppm antioxidant 1010, 500ppm α crystal nucleating agent NA325 were placed in a high-speed blender and mixed for 10 minutes, then added to a twin-screw extruder for Extrusion and pelletizing, the length-to-diameter ratio of the 5-section mixing elements of the twin-screw extruder is 35:1, the screw diameter is 35.6mm, and the main engine speed of the twin-screw extruder is 150 rpm, feeding...

Embodiment 2

[0044] According to the similar formulation embodiment 2 of embodiment 1, the difference is that the amount of PP is 60 parts, the grafted stearyl methacrylate basic magnesium sulfate whisker is 12 parts, and the molding is prepared according to the process conditions of embodiment 1 Polypropylene alloy material with low shrinkage.

[0045] The mechanical properties and shrinkage of the polymer alloys are shown in Table 2.

Embodiment 3

[0047] According to the similar formula embodiment 3 of embodiment 1, the difference is that 50 parts of PP are added, and the grafted stearyl methacrylate basic magnesium sulfate whisker is 14 parts, and the mold is prepared according to the process conditions of embodiment 1 Polypropylene alloy material with low plastic shrinkage.

[0048] The mechanical properties and shrinkage of the polymer alloys are shown in Table 2.

[0049] Table 1

[0050]

[0051] Table 2 Comparison of mold shrinkage and mechanical properties of polypropylene alloy materials in Examples 1 to 3 and existing EPC30R-H

[0052] performance

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Abstract

The invention discloses a polypropylene (PP) alloy material with low molding shrinkage. The PP alloy material is prepared from the following raw materials in part by weight: 5-20 parts of SEBS (Styrene-Ethylene-Butylene-Styrene), 5-30 parts of mixture of basic magnesium sulfate whiskers and inorganic filler, 50-90 parts of PP resin and 2-10 parts of compatilizer. The invention further discloses apreparation method for the PP alloy material. Due to the adoption of the PP alloy material with low molding shrinkage provided by the invention, the molding shrinkage of the PP is effectively lowered, and the original performance of the PP is greatly improved.

Description

technical field [0001] The invention relates to a polypropylene alloy material and a preparation method thereof, in particular to a polypropylene alloy material with low molding shrinkage and a preparation method thereof. Background technique [0002] Polypropylene (PP) is one of the general-purpose plastics with rich sources of raw materials and simple synthesis process. Its light weight, low price, easy processing and excellent mechanical properties make polypropylene products have outstanding stress resistance and corrosion resistance. Good chemical stability and hygienic safety. Compared with other general-purpose plastics, PP has good comprehensive properties and has been widely used in many fields. It is a thermoplastic with broad development prospects. However, polypropylene is prone to embrittlement at low temperatures, is sensitive to notches, has a large molding shrinkage rate, and is easy to age, which limits its wider application. Based on this, it has become a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/14C08L53/02C08L51/06C08K13/06C08K9/04C08K7/08C08K3/34C08K3/26B29B9/06
Inventor 谭捷梁平
Owner CHINA PETROLEUM & CHEM CORP
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