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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
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI 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 PP, polystyrene (PS) has higher hardness, low shrinkage, and excellent printability, but PS has poor environmental stress cracking resistance, toughness and solvent resistance

Method used

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  • Polypropylene/polystyrene alloy and method of producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A polypropylene / polystyrene alloy, consisting of the following raw materials in parts by weight: 40 parts of polypropylene (brand name: PP-PT231 manufacturer: Formosa Plastics Group); 60 parts of polystyrene; 5 parts of modifier; 0.4 parts of nucleating agent; 5 parts of filler; 0.5 parts of antioxidant; 2.5 parts of processing aid.

[0027] The tensile strength of the polypropylene is 35MPa, and the flexural modulus is 1300MPa. The trade mark of described 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 Specialty Chemical Co., Ltd.). The filler is organic bentonite. Described antioxidant is antioxidant 168 (Swiss Ciba Company). Described processing aid is white mineral oil.

[0028] The preparation method of the...

Embodiment 2

[0030] A polypropylene / polystyrene alloy, consisting of the following raw materials in parts by weight: 40 parts of polypropylene (brand: PP-J700 manufacturer: Langang Petrochemical); 60 parts of polystyrene; 40 parts of modifier; 1.2 parts of nucleating agent; 30 parts of filler; 1.5 parts of antioxidant; 10 parts of processing aid.

[0031] The tensile strength of the polypropylene is 30MPa, and the flexural modulus is 1100MPa. The trade mark of described 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 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 microspheres. Desc...

Embodiment 3

[0034] A polypropylene / polystyrene alloy, consisting of the following raw materials in parts by weight: 40 parts of polypropylene (brand: PP-HP748L manufacturer: Taiwan FORMOSA company); 60 parts of polystyrene; 20 parts of modifier; 0.8 parts of nucleating agent; 20 parts of filler; 1 part of antioxidant; 5.5 parts of processing aid.

[0035] The tensile strength of the polypropylene is 40MPa, and the flexural modulus is 1200MPa. The trade mark of described 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 consists of 3 parts of styrene-ethylene-propylene-styrene type block copolymer, 3 parts of styrene-ethylene-butylene-styrene type block copolymer and styrene-ethylene- 4 parts of butene block copolymer. The nucleating agent is modified talcum powder. The filler consists of 10 parts of organic benton...

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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.

Description

technical field [0001] The invention relates to a polypropylene / polystyrene alloy and a preparation method thereof, belonging to the technical field of engineering plastics. Background technique [0002] Polypropylene (PP) has rich sources of raw materials and a relatively simple synthesis process. Compared with other general-purpose thermoplastics, it has the characteristics of low density and low price, so it is widely used in the fields of automobiles, electrical appliances, packaging and daily necessities. However, PP has disadvantages such as large molding shrinkage, low hardness, poor thermoforming, easy aging, and poor printability, which limit its application. Compared with PP, polystyrene (PS) has higher hardness, low shrinkage, and excellent printability, but PS has poor environmental stress cracking resistance, toughness and solvent resistance. In order to obtain materials with excellent comprehensive properties, people have carried out research on the modificati...

Claims

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Application Information

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IPC IPC(8): C08L25/06C08L51/06C08L53/00C08L23/28C08L23/08C08K13/02B29B9/12B29C47/92C08L23/12B29C48/40B29C48/92
CPCB29C48/92B29C2948/92704B29C48/04B29C48/40B29C2948/92895
Inventor 易庆锋王灿耀孙刚吉继亮苏妤
Owner SHANGHAI KINGFA SCI & TECH
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