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Reinforced polyamide moulding compounds with low haze and moulds therefrom

A technology of polyamide and molding compound, which can be applied to household appliances, other household appliances, chemical instruments and methods, etc., and can solve problems such as unreasonable economy

Pending Publication Date: 2019-03-01
EMS PATENT AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If in each case a new glass has to be prepared for a specific polyamide with a specific refractive index, these efforts are not economically justifiable for a glass that is only used as a filler material and should be produced as cheaply as possible

Method used

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  • Reinforced polyamide moulding compounds with low haze and moulds therefrom
  • Reinforced polyamide moulding compounds with low haze and moulds therefrom
  • Reinforced polyamide moulding compounds with low haze and moulds therefrom

Examples

Experimental program
Comparison scheme
Effect test

Embodiment B1 to B4

[0191] 3.2 Manufacture of polyamide molding compounds according to examples B1 to B4 and VB1 to VB3

[0192] The molding compounds of Examples B1 to B4 and Comparative Examples VB1 to VB3 were produced on a twin-screw extruder type ZSK25 from the company Werner & Pfleiderer. The polyamides (A1) and (A2) were metered into the feed of the extruder by means of metering trolleys in the quantity parts indicated in Table 2. The glass fibers used are fed into the polymer melt in the desired ratio via a side feeder and further homogenized in the barrel of the compounding machine.

[0193] The temperature of the first shell was set at 80°C; the temperature of the remaining shells was set from 270°C to 300°C in an increasing manner. Use a speed of 200 rpm and a throughput of 12 kg / h and degas the third zone before the nozzle in a stream of nitrogen. The polyamide molding compound delivered as a line was cooled in a water bath, pelletized, and the resulting pellets were dried at 80° C....

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Abstract

The present invention relates to a polyamide molding compound comprising the following components or consisting of these components: (A) 40 to 95 wt % of a specific polyamide mixture consisting of thepolyamides (A1) and (A2); (B) 5 to 50 wt % of at least one glass filler having a refractive index in the range from 1.540 to 1.600; (C) 0 to 10 wt % of at least one additive; wherein the weight proportions of the components (A) to (C) add up to 100% wt %; wherein the at least one transparent polyamide (A2) has a transparency of at least 90% and a haze of at most 3%. The present invention additionally relates to molded bodies composed of this polyamide molding compound.

Description

technical field [0001] The invention relates to glass-filled low-haze polyamide molding compounds, moldings produced therefrom and their use. Background technique [0002] Due to their very good optical and mechanical properties, amorphous or microcrystalline polyamide molding compounds are widely used in optical applications in the fields of automotive parts, electronics, optical components, shields, housings, visible surfaces, etc. Blends of amorphous or microcrystalline polyamides and semicrystalline polyamides can also be used for these applications. In many cases, the addition of semi-crystalline polyamides to amorphous polyamides results in improved toughness, especially impact resistance. [0003] In order to increase properties such as stiffness, strength, deformation reduction and surface scratch resistance in particular, fibrous or granular glass fillers can be added to the molding compound. Typically, a deterioration of optical properties, especially haze and cl...

Claims

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Application Information

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IPC IPC(8): C08L77/06C08K7/14
CPCC08L77/06C08L2205/025C08L2201/10C08K7/14C08G69/36C08G69/265B32B2307/54B32B2250/02B32B2307/558B32B2264/101B32B2457/00B32B27/34B32B2250/24B32B2262/101B32B2307/418B32B27/20B32B2250/03B32B27/08B32B2307/538B32B2307/412C08L77/00C08K3/40C08G69/26C08G69/32C08J5/18C08J2377/10B29K2509/08B29C45/14508B29K2677/00B29K2077/00
Inventor 艾蒂安·埃普利博托·霍夫曼
Owner EMS PATENT AG
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