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High flow poly(phthalamide) compositions, and articles made therefrom

A technology of phthalamide and phthalimide, which is used in the field of high-fluidity poly(phthalamide) compositions and products manufactured therefrom, and can solve the problem of rough surface of products, difficult processing, etc. question

Active Publication Date: 2021-07-23
SABIC GLOBAL TECHNOLOGIEIS BV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High viscosity polymer compositions can be difficult to process during manufacture of articles and can result in articles with rough surfaces

Method used

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  • High flow poly(phthalamide) compositions, and articles made therefrom
  • High flow poly(phthalamide) compositions, and articles made therefrom
  • High flow poly(phthalamide) compositions, and articles made therefrom

Examples

Experimental program
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Effect test

example

[0070] The materials used are provided in Table 1.

[0071] Table 1

[0072]

[0073] All tests, except warpage, are based on ASTM standards (2015 test), as provided in Table 2.

[0074] Table 2

[0075]

[0076] Warpage measurement. A 1 kg weight was placed on the gate to secure the disk (135mm diameter, 1.2mm thickness) on a flat bench surface. Feeler gauges are used to measure the disc thickness at points A, B and C. Record the thickness at points A, B, and C as Warp-A, Warp-B, and Warp-C, respectively.

[0077] All examples are polymer compositions filled with mixed fillers in different ratios. Dry mix all components except glass fiber reinforced filler in a super float for 3-5 minutes. The polymer was pre-dried at 150°C for about 4 hours prior to extrusion. Glass fibers are fed downstream with a side feeder. Add the blend at the inlet. The formulations were compounded on a 37 mm Toshiba twin screw with a vacuum vented extruder at 300-350 rpm and 55-60 kg / hr...

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Abstract

A reinforced poly(phthalamide) composition comprising 20-80 weight percent of a poly(phthalamide) component comprising 15-55 weight percent of a crystalline poly(phthalamide), and 5-45 weight percent of an amorphous poly(phthalamide); 0.5-60 weight percent of a reinforcing filler; and 0.1-50 weight percent of an additive composition; wherein weight percent is based on the total weight of the reinforced poly(phthalamide) composition and totals 100; and wherein the reinforced poly(phthalamide) composition has a capillary melt viscosity, measured according to ASTM D3835 (2015) at 320 deg C, at 5000 s-1, that is at least 10 % lower than that of the same reinforced poly(phthalamide) composition without the amorphous poly(phthalamide), and a warpage that is at least 15 % lower than that of the same reinforced poly(phthalamide) composition without the amorphous poly(phthalamide).

Description

Background technique [0001] Poly(phthalamide) (PPA) is a high performance polymer with high strength, heat resistance and modulus, and broad chemical resistance. Poly(phthalamides) are widely used in applications including automotive, telecommunications, aerospace, electrical / electronic equipment, transportation, food service, and healthcare. Polymers such as PPA can have low heat transfer coefficients so that the rate of heat transfer during processing is slow and can lead to warping. The addition of reinforcing fillers to polymer compositions can somewhat increase heat transfer rates and reduce warpage. However, adding reinforcing fillers increases the viscosity of the composition. High viscosity polymer compositions can be difficult to process during manufacture of the article and can result in the article having a rough surface. [0002] Accordingly, there remains a continuing need for high flow poly(phthalamide) compositions with reinforcing fillers. Contents of the ...

Claims

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Application Information

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IPC IPC(8): C08L77/06
CPCC08L77/06C08K5/098C08K5/526C08K7/14C08L2205/025
Inventor 张亚琴沈良国明成张伟
Owner SABIC GLOBAL TECHNOLOGIEIS BV
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