POLYOXYMETHYLENE RESIN COMPOSITION

• Main Authors: TSUZUKI JUNICHI, SHIKANO YASUKAZU
• Format: Patent
• Language: English; Japanese
• Published: 07.09.2017
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; BEARINGS; BLASTING; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; GENERAL PROCESSES OF COMPOUNDING; HEATING; LIGHTING; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; MECHANICAL ENGINEERING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; THEIR PREPARATION OR CHEMICAL WORKING-UP; THERMAL INSULATION IN GENERAL; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WEAPONS; WORKING-UP

PROBLEM TO BE SOLVED: To provide a polyoxymethylene resin composition which has such extremely high slidable characteristics that abrasion loss at the time of minute load slide for a long period of time is reduced, especially has excellent slidable characteristics under high temperature environment, and has an odor reduction effect at the time of melt processing such as extrusion and molding and enhancement of production stability at the time of extrusion (suppression of strand breakage and eye mucus adhesion).SOLUTION: A polyoxymethylene resin composition contains (A) 100 pts.mass of a polyoxymethylene resin, and (B) 0.1-5 pts.mass of acid-modified polyolefin having an acid value of 38-80 mg-KOH/g.SELECTED DRAWING: None 【課題】長期間の微小荷重摺動時の摩耗を低減したきわめて高い摺動特性を有し、特に、高温環境下において優れた摺動特性を有し、さらには押出や成形などの溶融加工時の臭気低減効果や、またさらには押出時の生産安定性（ストランド切れやダイスへの目やに付着を抑制）の向上をも併せ持つポリオキシメチレン樹脂組成物を提供する。【解決手段】（Ａ）ポリオキシメチレン樹脂１００質量部と、（Ｂ）酸価が３８〜８０ｍｇ−ＫＯＨ／ｇである酸変性ポリオレフィン０．１〜５質量部と、を、含有する、ポリオキシメチレン樹脂組成物。【選択図】なし