Polypropylene/polystyrene alloy and method of producing the same

A polystyrene and polypropylene technology, applied in the field of polypropylene/polystyrene alloy and its preparation, can solve the problems of poor printability, low hardness, low shrinkage rate, etc., and achieve good comprehensive mechanical properties, high surface gloss, good compatibility

Active Publication Date: 2009-04-08
SHANGHAI KINGFA SCI & TECH +1
0 Cites 15 Cited by

AI-Extracted Technical Summary

Problems solved by technology

However, PP has disadvantages such as large molding shrinkage, low hardness, poor thermoforming, easy aging, and poor printability, which limit its application.
Compared with ...
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Abstract

The invention relates to a polypropylene/polystyrene alloy and a preparation method thereof. The polypropylene/polystyrene alloy is characterized by consisting of raw materials with the following weight portions: 40 portions of polypropylene, 60 portions of polystyrene, 5 portions to 40 portions of modifier, 0.4 portion to 1.2 portions of nucleating agent, 5 portions to 30 portions of fillings, 0.5 portion to 1.5 portions of antioxidant and 2.5 portions to 10 portions of processing aid. The preparation method comprises the steps: firstly, polypropylene, polystyrene and white mineral oil or silicon oil are mixed together in a high-speed mixer, added and fully mixed with a composite modifier, modified fillings, the antioxidant and the processing aid, and extruded for granulation from a combined twin-screw extruder at temperatures of 190 DEG C to 210 DEG C. The polypropylene/polystyrene alloy has quite good surface glossiness and good comprehensive performance and can replace acrylonitrile-styrene-butadiene copolymer.

Technology Topic

PolypropyleneButadiene-styrene rubber +9

Image

  • Polypropylene/polystyrene alloy and method of producing the same

Examples

  • Experimental program(5)

Example Embodiment

[0025] Example 1
[0026] A polypropylene/polystyrene alloy consisting of the following raw materials in parts by weight: polypropylene (brand: PP-PT231 manufacturer: Formosa Plastics Group) 40 parts; polystyrene 60 parts; modifier 5 parts; 0.4 parts of core agent; 5 parts of fillers; 0.5 parts of antioxidants; 2.5 parts of processing aids.
[0027] The tensile strength of the polypropylene is 35 MPa, and the flexural modulus is 1300 MPa. The grade of the polystyrene is PS GPPS 251P (Shanghai Secco Petrochemical Co., Ltd.). The modifier is composed of 2 parts of maleic anhydride grafted polypropylene and 3 parts of hydrogenated block polymer. The hydrogenated block polymer is a styrene-isoprene-styrene block copolymer. The nucleating agent is NA-11 (Ciba Fine Chemical Co., Ltd.). The filler is organic bentonite. The antioxidant is antioxidant 168 (Swiss Ciba). The processing aid is white mineral oil.
[0028] The above-mentioned preparation method of polypropylene/polystyrene alloy, the specific steps are: firstly mix polypropylene, polystyrene and processing aids in a high-mixer, then add modifiers, fillers, and antioxidants, and mix It is uniform, and then melt-extruded and pelletized in a combined twin-screw extruder, and the extrusion temperature is 190°C.

Example Embodiment

[0029] Example 2
[0030] A polypropylene/polystyrene alloy consisting of the following raw materials in parts by weight: polypropylene (brand: PP-J700 manufacturer: Langang Petrochemical) 40 parts; polystyrene 60 parts; modifier 40 parts; 1.2 parts of core agent; 30 parts of filler; 1.5 parts of antioxidant; 10 parts of processing aid.
[0031] The tensile strength of the polypropylene is 30 MPa, and the flexural modulus is 1100 MPa. The grade of the polystyrene is PS GPPS 251P (Shanghai Secco Petrochemical Co., Ltd.). The modifier consists of 10 parts of chlorinated polyethylene, 10 parts of ethylene-n-butyl acrylate-glycidyl methacrylate copolymer, 10 parts of linear low-density polyethylene grafted with maleic anhydride and ethylene-acetic acid It is composed of 10 parts of vinyl ester copolymer. The nucleating agent is Microstat 42 (Shanghai Shengxingxing Chemical Co., Ltd.). The filler is composed of 10 parts of modified calcium carbonate and 20 parts of glass beads. The antioxidant is antioxidant 1010 (Swiss Ciba). The processing aid is silicone oil.
[0032] The above-mentioned preparation method of polypropylene/polystyrene alloy, the specific steps are: firstly mix polypropylene, polystyrene and processing aids in a high-mixer, then add modifiers, fillers, and antioxidants, and mix Uniform, and then melt-extrusion pelletizing in the combined twin-screw extruder, the extrusion temperature is 210°C.

Example Embodiment

[0033] Example 3
[0034] A polypropylene/polystyrene alloy consisting of the following raw materials in parts by weight: polypropylene (brand: PP-HP748L manufacturer: Taiwan FORMOSA) 40 parts; polystyrene 60 parts; modifier 20 parts; 0.8 parts of core agent; 20 parts of filler; 1 part of antioxidant; 5.5 parts of processing aid.
[0035] The tensile strength of the polypropylene is 40 MPa, and the flexural modulus is 1200 MPa. The grade of the polystyrene is PS GPPS 251P (Shanghai Secco Petrochemical Co., Ltd.). The modifier is composed of 10 parts of maleic anhydride grafted polypropylene and 10 parts of hydrogenated block polymer. The hydrogenated block polymer is composed of 3 parts of styrene-ethylene-propylene-styrene type block copolymer, 3 parts of styrene-ethylene-butylene-styrene type block copolymer and styrene-ethylene- The butene block copolymer consists of 4 parts. The nucleating agent is modified talc. The filler is composed of 10 parts of organic bentonite and 10 parts of modified calcium carbonate. The antioxidant is antioxidant 1010 (Swiss Ciba). The processing aid is calcium stearate.
[0036] The above-mentioned preparation method of polypropylene/polystyrene alloy, the specific steps are: firstly mix polypropylene, polystyrene and processing aids in a high-mixer, then add modifiers, fillers, and antioxidants, and mix Uniform, and then melt-extrusion pelletizing in the combined twin-screw extruder, the extrusion temperature is 200°C.
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PUM

PropertyMeasurementUnit
Tensile strength35.0mPa
Flexural modulus1300.0mPa
Tensile strength30.0mPa
tensileMPa
Particle sizePa
strength10

Description & Claims & Application Information

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