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High-concentrate masterbatches comprised of multifunctional compounds for polyester expanding process

A multifunctional compound, masterbatch technology, applied in the field of masterbatch, can solve the problems of instability, pressure reduction, insufficient thermal stabilization of polyethylene or polyester, etc., to save costs and improve effectiveness.

Inactive Publication Date: 2011-09-14
ARMACELL ENTERPRISE GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is a common shortcoming of [1-5], which reduces the efficiency of the masterbatch in subsequent applications
Furthermore, it is disadvantageous to apply the preparation process disclosed in [5] to chain-extending concentrates containing the process stabilizer Irganox 1010 at 180 °C, because at this temperature, Irganox 1010 may already be consumed in the preparation process, which may cause final Insufficient thermal stabilization of polyethylene or polyester during foaming
[0013] In the case of post-consumer polyesters, which require much higher additions of chain-extended concentrates, increased polyethylene in formulations has a higher potential for degradation and is prone to pressure drops, which can lead to explosions. process instability during bubbling

Method used

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  • High-concentrate masterbatches comprised of multifunctional compounds for polyester expanding process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] 7 parts by weight of LDPE powder with average particle size = 200-250 μm, MFI = 7.5 g / 10 min at 190° C. / 2.16 kg, 2 parts by weight of Irganox B 561 and 91 parts by weight of PMDA were mixed in a high speed mixer at 550 l / min for 5 minute. Said mixture is sent in the disc mill press machine Kahl 14-175, compacted and granulated into granules, press machine and process parameters are:

[0056] Porous die head: outer diameter = 175mm, porous area = 106cm 2

[0057] Gap between roller and die plate: 0.5mm

[0058] Dimensions of the two rollers: diameter / width=130 / 29mm

[0059] Rotational speed of each roller: 0.5-0.8m / s

[0060] Mixture temperature: 55-70°C

[0061] Output: 8-12kg / h

[0062] Cooler temperature: 25°C

[0063] Cooling time: 1-5 minutes

[0064] Pellets with a particle size of less than 3mm still have a temperature of 55-75°C before being conveyed to the vibratory cooling line, where they are cooled for packaging. After cooling, the granulated mixture...

Embodiment 2

[0066] Repeat the steps of Example 1, the difference is, add 20 parts by weight Irganox 1330, replace 91 parts by weight PMDA and 5 parts by weight of PMDA with 73 parts by weight of PMDA MFI=4g / 10 min of EVA was used in the preparation process instead of 7 parts by weight of LDPE.

Embodiment 3

[0068] Repeat the steps of Example 2, the difference is, add 50 parts by weight of PET copolymer (I.V.=0.76dl / g, the particle of at least 80wt% is less than 200 μ m), replace 73 parts by weight of PMDA and 5 parts by weight of PMDA with 23 parts by weight of PMDA EMA with an average particle size of 200-300 μm, MFI=8 g / 10 min at 190° C. / 2.16 kg was used in the preparation process instead of EVA.

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Abstract

The composition and the preparation of multifunctional high-concentrate masterbatches for production of expanded materials of aromatic polyesters are disclosed in this invention. The masterbatch includes a thermoplastic wax having a vicat softening temperature not higher than 100 DEG C and a high-percentage of a multifunctional compound, wherein the preparation involves a) a low temperature process with a masterbatch temperature lower than 100 DEG C before cooling and b) cooling without contact of the mixture with water during the whole process. The high-concentrate masterbatch can be applied in production of expanded materials of polyester.

Description

technical field [0001] The present invention relates to a masterbatch, more specifically, to a multifunctional high-concentration masterbatch for producing polyester foam materials. Background technique [0002] Polyester foaming is a fairly new technology that is increasingly being implemented using reactive extrusion, which involves upgrading or enlarging aromatic polyesters during extrusion. Resin molecular weight and extensional viscosity. Therefore, only a limited number of technologies are found in the prior art field. The limited prior art to date discloses the application of chain extenders such as polyfunctional tetracarboxylic dianhydrides to improve the quality of polyester resins. [0003] For example invention [1] discloses the combination of chain extenders such as tetracarboxylic dianhydrides with antioxidants comprising sterically hindered phenolic end groups, the addition of oxazolines to said mixtures and the use of these compositions. [0004] In order ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/00C08L67/02C08L67/03C08L23/08C08L23/06C08L31/04C08L33/08C08K5/092C08K5/13C08K5/5357C08K5/353C08J3/22C08J9/14
CPCC08J3/226B29C44/3461C08L67/00C08J2467/00C08J9/0061C08L23/0869C08J2367/00C08L91/06C08L2666/06
Inventor J·李
Owner ARMACELL ENTERPRISE GMBH & CO KG