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High toughness, high strength polypropylene composition and preparation method thereof

A high-strength, high-toughness technology, applied in the high-strength polypropylene resin composition and its preparation, high-toughness field, can solve the problems of low notched impact strength, poor creep resistance, and easy brittle fracture of the resin, and meet the process conditions. The effect of easy control, improved resin strength, and simple process

Active Publication Date: 2011-12-28
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since PP is a semi-crystalline polymer, the structural characteristics lead to low notched impact strength of the resin, brittle fracture at low temperature, large shrinkage rate, and poor creep resistance, which greatly limits the further application of the resin.

Method used

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  • High toughness, high strength polypropylene composition and preparation method thereof
  • High toughness, high strength polypropylene composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] (1) Preparation of modified powdered styrene-butadiene rubber

[0055] Add 0.08kg of water and 0.2kg of carboxylated styrene-butadiene latex a into a 15L coagulation kettle, feed low-pressure steam, heat the slurry to 55°C and mix for 3 minutes; add 8g of spacer and mix for 3 minutes, then add 2kg of powdered styrene-butadiene rubber 1500a and mix 40 minutes; discharging, dehydration, and drying at 50°C for 24 hours to obtain modified powdered styrene-butadiene rubber.

[0056] (2) Preparation of polymer functionalized kaolin

[0057] Make a slurry of 3kg water and 1kg kaolin into a 15L coagulation kettle and mix for 2 minutes; add 15g titanate coupling agent NDZ-101 and mix for 8 minutes under stirring conditions, then add 0.2kg carboxylated nitrile latex b and mix for 25 minutes; finally add 10g of release agent was mixed for 5 minutes, discharged, dehydrated, and dried at 70-80°C for 10 hours to obtain functionalized kaolin.

[0058] (3) Preparation of polypropylen...

Embodiment 2

[0061] (1) Preparation of modified powdered styrene-butadiene rubber: with embodiment 1

[0062] (2) Preparation of macromolecule functionalized kaolin: carboxylated nitrile latex b is replaced with carboxylated styrene-butadiene latex a, and others are the same as in Example 1

[0063] (3) Preparation of polypropylene composition: with embodiment 1.

Embodiment 3

[0065] (1) Preparation of modified powdered styrene-butadiene rubber: with embodiment 1

[0066] (2) Preparation of polymer functionalized kaolin: same as Example 1

[0067] (3) Preparation of polypropylene composition:

[0068] Put 2kg of polypropylene 7726 pellets, 0.2kg of PP-g-MAH, and 10g of polypropylene wax into a high-speed mixer and mix for 3 minutes; add 0.3kg of modified powdered styrene-butadiene rubber 1500a, and mix for 5 minutes; then add 0.4kg of functionalized Kaolin, 2g antioxidant 1010, and 3g zinc stearate were mixed for 5 minutes; the mixed raw materials were added to a Φ34 twin-screw extruder for extrusion granulation. The extrusion granulation process conditions are shown in Table 1. The prepared composition The pellets are made into standard samples by injection method, and the properties obtained through testing are shown in Table 2.

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Abstract

The invention discloses a high-toughness and high-strength polypropylene resin composition. The resin composition comprises (calculated as the weight of the polypropylene): (1) 100% of the polypropylene; (2) 9-18% of carboxylic styrene butadiene latex modified powder styrene butadiene rubber; (3) 13-24% of a functionalized inorganic filler; (4) 5-10% of grafted polypropylene. The functionalized inorganic filler is prepared through common treatment by a coupling agent and carboxylic latex. According to the present invention, compared to the polypropylene base material, the impact resistance ofthe polypropylene resin composition is improved by more than 10 times, the strength of the polypropylene resin composition is improved by more than 50%, and the rigidity is maintained; the productionmethod for the composition has advantages of short process, simple technology, easily controllable technology condition and the like; the prepared polypropylene composition can widely replace ABS andother engineering materials, and is applicable for preparing the large-scale thin-walled product. The invention further discloses a preparation method for the composition.

Description

Technical field [0001] The invention relates to a high-toughness, high-strength polypropylene resin composition and a preparation method thereof, in particular to a high-toughness, high-strength polypropylene resin composition modified with powdered styrene-butadiene rubber and inorganic particles and a preparation method thereof. Background technique [0002] Polypropylene (PP) is currently the fastest-growing variety of general-purpose synthetic resins. PP is one of the most important development directions for PP materials to replace engineering plastics in the manufacture of automobiles, home appliances, and furniture parts. However, since PP is a semi-crystalline polymer, its structural characteristics lead to low notched impact strength of the resin, brittle fracture at low temperature, large shrinkage rate, and poor creep resistance, which greatly limit the further application of the resin. As a result, the research on the high-performance modification of PP has recei...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/10C08L9/06C08L13/02C08L51/06C08K9/04C08K9/06C08K3/34C08K13/06B29C47/92B29C48/92
CPCB29C48/04B29C48/92B29C2948/92561B29C2948/92704B29C2948/92895
Inventor 徐典宏刘鹏李耀白竞冰李晶何连成牛承祥龚光碧张元寿艾纯金魏绪玲朱晶
Owner PETROCHINA CO LTD