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Composite foaming agent and polypropylene foam material prepared from same

A technology of composite foaming agent and foaming material, which is applied in the field of polymers and can solve problems such as unfavorable cell structure and failure to prepare composite foaming agent powder

Inactive Publication Date: 2013-01-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lian Rongbing et al. (Modern Plastic Processing Application, 2007, 19(4): 35-38) introduced the effect of a foaming agent on soft PVC foaming materials, in which N, N'-dinitroso Pentamethylenetetramine, coarse foaming agent and sodium citrate and other auxiliary foaming agents, but the foaming agent is gradually added in stages during the kneading process, no composite foaming agent powder is prepared, and no foaming agent is added. Foam temperature control agent, not conducive to the formation of good cell structure

Method used

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  • Composite foaming agent and polypropylene foam material prepared from same
  • Composite foaming agent and polypropylene foam material prepared from same
  • Composite foaming agent and polypropylene foam material prepared from same

Examples

Experimental program
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Effect test

preparation example Construction

[0083] Preparation of High Melt Strength Polypropylene:

[0084] HMSPP101

[0085] The polymerization reaction was carried out on a polypropylene pilot plant. Its main equipment includes prepolymerization reactor, first loop reactor and second loop reactor. Polymerization method and steps are as follows:

[0086] (1) Prepolymerization reaction:

[0087] The main catalyst (titanium-containing solid catalyst active component) is obtained by the method described in Example 1 of Chinese Patent CN93102795, its Ti content: 2.4wt%, Mg content 18.0wt%, di-n-butyl phthalate content: 13wt %.

[0088] The main catalyst, co-catalyst (triethylaluminum), and the first external electron donor (dicyclopentyldimethoxysilane, DCPMS) were 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 body, the temp...

Embodiment 1～16

[0107] Put the high-melt-strength polypropylene, compound foaming agent, cell control agent and processing aid into the high-speed mixer for 1 minute at high speed, and then add the middle layer of twin-screws. The torque is controlled at about 65%, and the speed is: 10-170rpm. The processing aids include Antioxidant 1010 (BASF Company), Antioxidant 168 (BASF Company), etc., and the consumption is a conventional dosage. Specific GB / T 1033.1-2008 is used for density measurement, see Table 3.

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PUM

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Abstract

The invention discloses a composite foaming agent and a polypropylene foam material prepared from the same. The foaming agent comprises the following components in parts by weight: 100 parts of azodicarbonamide, 10-20 parts of N,N'-dimethyl-N,N-dinitrosoterephthalamide, 10-30 parts of zinc oxide and 10-30 parts of sodium citrate. The polypropylene foam material comprises the following blended components in parts by weight: 100 parts of high-melt strength polypropylene and 3-15 parts of composite foaming agent. The composite foaming agent disclosed by the invention has controllable foaming temperature, uniform foam cell, smooth surface and high physical heat resistance; and the polypropylene foam material prepared from the composite foaming agent meets the environmental protection requirement, is degradable and low in production cost, and is suitable for continuous large-scale production.

Description

technical field [0001] The invention relates to the field of macromolecules, and more particularly relates to a composite foaming agent and a polypropylene foam material prepared by using the compound foaming agent. Background technique [0002] Polymer foamed plastics mainly include three categories of soft and rigid foamed plastics such as polyurethane, polystyrene and polyethylene. Polyurethane foam is a commonly used foam but is not as easily thermoformable as thermoplastic polymer foams including polypropylene (PP). Expanded polystyrene products have poor resilience, extruded foamed products have high rigidity, are easy to pulverize, and the waste is light in weight, large in size, resistant to aging, corrosion, stable in chemical properties, and not easily degraded by microorganisms. After entering the soil, If the soil quality is deteriorated, the method of burning will produce carbon dioxide and other harmful gases, which will also cause adverse greenhouse effects a...

Claims

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Application Information

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IPC IPC(8): C08J9/06C08J9/10C08L23/12
Inventor 郭鹏吕明福张师军徐萌高达利徐凯吕芸杨庆泉陈力
Owner CHINA PETROLEUM & CHEM CORP
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