Production process of polypropylene resin composite containing long branched chain

A polypropylene resin and a manufacturing method technology are applied in the field of preparing high melt strength polypropylene, can solve the problems of limited application, insufficient melt strength and strain hardening, etc., and achieve the effect of expanding the scope of application

Inactive Publication Date: 2003-07-30
YANGZI PETROCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Commercial polypropylene is an isotactic, semi-crystalline thermoplastic polymer, however, due to its insufficient melt strength and strain hardening, its disadvantages in melt processing lim...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] 1. At room temperature, mix 0.7ml of 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane (concentration is 85wt%, domestic and commercially available) and diacrylic acid-1,6-butyl Glycol ester (HDDA) and acetone are made into the solution of 20ml, make peroxide, the acetone solution of polyfunctional group monomer;

[0016] 2. Raise the temperature of the twin-screw extruder (φ30, L / D=35). Except for the die head at 220°C, the temperature of the other sections is controlled at 200°C. The screw temperature is controlled by the electric heating wire and cooling water through the regulating valve. ; 3KgF401 polypropylene powder (Yangzi Petrochemical Plastic Factory, MFR2.20g / 10min, without adding any additives) is added to the screw rod through the feeding port of the twin-screw extruder, and the feeding speed is 0.3Kg / min; The acetone solution of compound, multifunctional monomer adds solution with the speed of 2ml / min from the feeding port in screw rod middle part with precise ...

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PUM

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Abstract

A production process of polypropylene resin composite containing long branched chain and with strain hardening characteristic, high melt strength and no gel includes the steps of: dissolving 2,5-dimethyl-2,5-di(tert-butyl peroxide) hexane and 1,6-butanediol biacrylate in acetone at room temperature to form acetone solution of peroxide and polyfunctional group monomer; feeding polypropylene powderto double-screw extruder heated to reaction temperature via its feeding port; feeding the acetone solution via the middle feeding port so as to make peroxide, polyfunctional group monomer and polypropylene melt react inside the double-screw extruder while turning on the vacuum pump in the tail of the extruder to pump out solvent and other volatile matters; mixing with antioxidant, extruding and stoving to obtain the final product.

Description

1. Technical field: [0001] The present invention is a process for preparing high melt strength polypropylene, in particular a process for preparing high melt strength polypropylene having strain hardening properties and being gel-free. 2. Background technology: [0002] Commercial polypropylene is an isotactic, semi-crystalline thermoplastic polymer, however, due to its insufficient melt strength and strain hardening, its disadvantages in melt processing limit its use in extrusion coating, blow molding , foaming and profile extrusion thermoforming applications, because polypropylene synthesized by Ziegler-Natta catalyst is a linear polymer without branching. In order to obtain high melt strength polypropylene with long chain branching and strain hardening rheological properties, in recent years, various processes and technologies have been frequently seen in the literature, such as patents CN86,100,791A, CN1,105,033A and EP190,889 has obtained branched high-melt strength po...

Claims

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Application Information

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IPC IPC(8): B29B9/12C08L23/12
Inventor 黄成王兴仁柏基业
Owner YANGZI PETROCHEM
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