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Propylene butene copolymer foamed beads and preparation method thereof

A technology of foaming beads and butene, which is applied in the field of polymers, can solve the problems of increasing low-molecular random substances, high n-hexane extract, and limiting the application range, etc., and achieves effective expansion of the foaming window, low cost, and high technology Easy to Adjust Effects

Active Publication Date: 2015-09-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the low molecular weight part of ethylene propylene random copolymerization polypropylene often has too high ethylene content, thereby increasing the content of low molecular random substances in the product, resulting in a high n-hexane extract of the product, which limits its application range, especially In the field of food hygiene packaging

Method used

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  • Propylene butene copolymer foamed beads and preparation method thereof
  • Propylene butene copolymer foamed beads and preparation method thereof
  • Propylene butene copolymer foamed beads and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0032] Preparation of matrix resin HMSPP301

[0033] The polymerization reaction was carried out on a polypropylene pilot plant. Its main equipment includes prepolymerization reactor, first loop reactor and second loop reactor.

[0034] Pre-polymerization reaction: the main catalyst (titanium-containing solid catalyst active component) is obtained by the method described in Example 1 of Chinese patent CN93102795, the Ti content is 2.4wt%, the Mg content is 18.0wt%, and the di-n-phthalic acid The butyl ester content is 13 wt%. The main catalyst, co-catalyst (triethylaluminum), and the first external electron donor (dicyclopentyldimethoxysilane, DCPMS) are pre-contacted at 10°C for 20 minutes, and then continuously added to the pre-polymerization reactor for pre-polymerization. In the polymerization reactor, the pre-polymerization is carried out in the environment of the propylene liquid phase bulk, the temperature is 15°C, and the residence time is about 4 minutes. Under this...

Embodiment 1~30

[0050] Put 100 parts by weight of high melt strength polypropylene, cell nucleating agent (silicon dioxide or zinc borate) and additives into a high-speed mixer and mix at high speed for 30 seconds, then add LabLine100 microparticle preparation system, and the torque is controlled at about 65% , with a rotating speed of 300 rpm, and pelletizing under water to obtain polypropylene resin particles. Among them, the additives include 0.2 parts by weight of antioxidant 1010 (BASF company) and 0.1 part by weight of antioxidant 168 (BASF company); the amount of cell nucleating agent is shown in Table 5.

[0051] Wherein, the type of polypropylene used in Examples 1-15 is HMSPP301, the type of polypropylene used in Examples 16-30 is HMSPP302; the cell composition used in Examples 1-4, 9-12, 16-19 and 24-27 The nucleating agent is silicon dioxide, and the cell nucleating agent used in Examples 5-8, 13-15, 20-23 and 28-30 is zinc borate.

[0052] Use deionized water as the dispersion m...

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Abstract

The invention provides a polypropylene foamed bead. The foamed bead is prepared by foaming a base resin high-melt-strength polypropylene with a foaming agent, wherein the high-melt-strength polypropylene has the following characteristics: the melt index MFR is 0.2-10 g / 10 minutes, the molecular weight distribution Mw / Mn is 6-20, the content of substances with the molecular weight of greater than 5 million is greater than or equal to 0.8 wt%, the M[z+1] / Mn is greater than or equal to 70, and the butylene content is 0.1-15 wt%. The high-melt-strength polypropylene with wide molecular weight distribution is utilized as the raw material to implement stabilization of the polypropylene raw material, so that the foaming window is effectively enlarged, the technique is easy to adjust, and the cost is low; the method can be used for preparing the polypropylene foamed bead with the density of 0.02-0.3 g / cm<3>, which has the advantages of uniform pore diameter, compact pores, uniform pore size distribution, closed cell structure and lower content of n-hexane extract; and the polypropylene foamed bead can be widely used in the fields of thermal insulation tableware, automobile interior ornaments, architectural moldboards, camping supplies, decorating material interlayers, product damping packages and the like.

Description

technical field [0001] The invention relates to the field of macromolecules, in particular to a propylene butene high melt strength polypropylene foaming beads and a preparation method thereof. Background technique [0002] Polypropylene resin has excellent properties such as good processability, heat resistance, recyclability, environmental friendliness, and mechanical strength, so its application fields are constantly expanding. Similarly, the polypropylene resin expanded particle molded body formed by foaming polypropylene resin micro-particles into expanded particles (EPP) by the reactor impregnated gas method, and then in-molding can maintain the excellent properties of the above-mentioned polypropylene resin , In addition, it can also give it characteristics such as light weight, cushioning, and heat insulation. Compared with polystyrene series resin expanded particle moldings, polypropylene foam molding obtained by molding polypropylene expanded particles The body al...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/14C08K3/26C08K3/38C08J9/12
CPCC08F210/06C08J9/122C08J2203/06C08J2205/052C08J2323/14C08L23/14C08L2201/06C08L2201/08C08L2203/14C08F210/08C08F2500/04C08F2500/11C08F4/6465
Inventor 郭鹏吕明福张师军宋文波刘有鹏邹浩邵静波李杰高达利权慧
Owner CHINA PETROLEUM & CHEM CORP
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