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Thermoplastic wear resistant compositions, methods of manufacture thereof and articles containing the same

A composition and product technology, applied in the field of thermoplastic wear-resistant compositions, can solve the problems of expensive internal lubricants, physical aging, cracking, etc.

Inactive Publication Date: 2008-01-09
SABIC INNOVATIVE PLASTICS IP BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such internal lubricants are expensive and increase the complexity and number of steps in the process
In addition, polymeric contact parts often undergo physical aging over time and crack due to inability to withstand the impact forces encountered during operation

Method used

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  • Thermoplastic wear resistant compositions, methods of manufacture thereof and articles containing the same
  • Thermoplastic wear resistant compositions, methods of manufacture thereof and articles containing the same
  • Thermoplastic wear resistant compositions, methods of manufacture thereof and articles containing the same

Examples

Experimental program
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Effect test

Embodiment

[0099] This example illustrates the advantageous abrasion resistance and impact properties of thermoplastic compositions comprising polycarbonate, polycarbonate-polysiloxane copolymer, and anhydride-modified polyethylene. A blend of two polycarbonates with a polycarbonate-polysiloxane copolymer was used. These two blends are EXRL0049  (clear blend comprising 17% by weight polycarbonate and 83% by weight polycarbonate-polysiloxane copolymer) and EXL1414  (opaque blend comprising 82.5% by weight polycarbonate and 17.5% by weight polycarbonate-polysiloxane copolymer). As detailed below, each blend with LUBRILOYDEP  Intermediate (manufactured by LNP) mixed.

[0100] Will 71.600% FUSABOND MB226D  (maleic anhydride modified polyethylene, available from DuPont) was precompounded with 3.4% A2504 (ε-amino-N-caproic acid, available from Sigma Chemicals). Precompounding takes place in a twin-screw extruder. Add 25% FUSABOND MB226D to this premix  . The additional FUSABOND MB...

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Abstract

Disclosed herein is a composition comprising a polycarbonate resin; a polycarbonatepolysiloxane copolymer; and an anhydride modified polyolefin. Disclosed herein too is a composition comprising a blend of a polycarbonate resin with a polycarbonatepolysiloxane copolymer; and an anhydride modified polyethylene, wherein the composition has a wear factor of less than or equal to about 350 in<5>min / ftlb-hr and an impact strength of greater than or equal to about 500 joules per meter, and wherein the wear factor is measured according to the formula: Wear Factor= [(6.1 x10 <8 >)(W)] / [(PxV)x (D) x (T)] where P is the applied pressure in pounds per square inch and V is the velocity in feet per minute, W is the weight loss in grams, D is the density in grams per cubic centimeter and T represents 100 hours.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application 60 / 629439, filed November 19,2004. Background of the invention [0003] The present disclosure relates to thermoplastic wear-resistant compositions, methods of making the same, and articles comprising the same. [0004] Machine parts subject to friction often use external lubricants, such as oil or grease, to increase wear resistance and reduce friction losses. However, such external lubricants typically must be changed periodically and may be unevenly distributed over the wear surfaces, resulting in increased costs and inefficient machine components. Furthermore, external lubricants are generally undesirable, for example in the field of food processing or in photocopying where the product is not to be contaminated. [0005] Using polymer machine parts in contact with each other reduces or eliminates the need for external lubricants. Polymer parts can b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08L83/10
Inventor N·孔特黄华
Owner SABIC INNOVATIVE PLASTICS IP BV
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