THERMOPLASTIC POLYETHER-ESTER BLOCK COPOLYMER COMPOSITION AND SLIDING PART MATERIAL USING IT

THERMOPLASTIC POLYETHER-ESTER BLOCK COPOLYMER COMPOSITION AND SLIDING PART MATERIAL USING IT

PURPOSE:To obtain a thermoplastic polyether-ester block copolymer composition useful as a bearing, gear, guide roller, etc., having a good heat resistance and wear resistance, by blending a small amount of distearyl thiodipropionate, etc., with a polyether-ester block copolymer. CONSTITUTION:In (A)...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: YANAKA TETSUO, ONMIYACHI TAKAHITO, SATO TETSUO, MATSUNAMI HITOSHI
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
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Beschreibung
Zusammenfassung:PURPOSE:To obtain a thermoplastic polyether-ester block copolymer composition useful as a bearing, gear, guide roller, etc., having a good heat resistance and wear resistance, by blending a small amount of distearyl thiodipropionate, etc., with a polyether-ester block copolymer. CONSTITUTION:In (A) a polyether-ester block copolymer containing 10-30(wt.)%, preferably 20-30% of a unit of a polytetramethylene glycol as a soft segment together with an aromatic polyester (preferably prepared from dimethyl terephthalate and 1,4-butane diol) as a hard segment, (B) distearyl-3,3'- thiodipropionate and/or distearyl-beta,beta'-thiobutylate of 0.1-0.5%, preferably 0.4-0.5% is mixed to obtain the objective composition. It is preferable to further mix a hindered phenol type antioxidant of 0.1-0.5%.