JP2007332269A5

JP2007332269A5 -

Info

Publication number: JP2007332269A5
Application number: JP2006165644A
Authority: JP
Filing date: 2006-06-15
Publication date: 2009-07-16
Anticipated expiration: 2026-06-15

Description

これらのフッ素系樹脂の粒子は、塊状重合法、懸濁重合法、溶液重合法、乳化重合法などで得られたフッ素樹脂を粒子径0.1〜5μm程度に分級したものや、懸濁重合法、溶液重合法、乳化重合法などで得られた分散液をせん断攪拌などにより、0.1〜5μm程度に微粒子分散させたもの、これらの重合法で得られたものを凝析・乾操後、乾式粉砕や冷却粉砕により、10μm以下に微粒子化したものなどが用いられる。0.1〜10μmに設定される粒子径において、粒子径がより小さい場合には、塗布厚みを小さく出来るメリットがあるが、塗布表面の凹凸が小さくなることにより接触面積が小さくなり、低面圧では摩擦係数が大きくなる傾向があり、一方粒子径がより大きい場合には、塗布厚みが大きくなり、塗布の際のコストがかかるが、凹凸が大きくなり、低面圧では相手材との接触面積が小さくなり、摩擦係数が下がるようになる。したがって、粒子径は使用要求によって適宜調整され、例えばシール部品などではこれら長所、短所を考慮して決定され、好ましくは0.5〜2μm程度のものが用いられる。 These fluororesin particles are obtained by classifying a fluororesin obtained by a bulk polymerization method , a suspension polymerization method , a solution polymerization method , an emulsion polymerization method or the like into a particle size of about 0.1 to 5 μm, a suspension polymerization method , Dispersions obtained by solution polymerization method , emulsion polymerization method, etc. are dispersed in fine particles to about 0.1-5μm by shearing stirring, etc., and those obtained by these polymerization methods are coagulated and dried, then dry pulverized by and cooling grinding, such as those micronized is used to 10μm or less. When the particle size is set to 0.1 to 10 μm, if the particle size is smaller, there is an advantage that the coating thickness can be reduced, but the contact area becomes smaller due to the unevenness of the coating surface being reduced, and friction at low surface pressures When the particle size is larger, on the other hand, when the particle size is larger, the coating thickness becomes larger and the cost for coating increases, but the unevenness becomes larger and the contact area with the counterpart material becomes smaller at low surface pressure. Thus, the friction coefficient is lowered. Therefore, the particle diameter is appropriately adjusted according to the usage requirements, and for example, seal parts are determined in consideration of these advantages and disadvantages, and those having a particle size of about 0.5 to 2 μm are preferably used.

イソシアネート基含有1,2-ポリブタジエンとしては、末端基としてイソシアネート基が付加された分子量1,000〜3,000程度のものが用いられ、これは市販品、例えば日本曹達製品日曹TP-1001(酢酸ブチル50重量％含有溶液)などをそのまま用いることが出来る。このポリブタジエン樹脂は、同様のイソシアネート基で反応高分子化するポリイソシアネート樹脂よりも、ゴムとの相性、相溶性が良いため、ゴムとの密着性が良く、特に耐摩擦・摩耗特性が良いのが特徴である。 As the isocyanate group-containing 1,2-polybutadiene, a molecular weight of about 1,000 to 3,000 with an isocyanate group added as a terminal group is used, which is a commercial product such as Nippon Soda product Nisso TP-1001 (butyl acetate 50 wt. % -Containing solution) can be used as they are. This polybutadiene resin has better compatibility and compatibility with rubber than polyisocyanate resin that reacts with the same isocyanate group to polymerize, so it has good adhesion to rubber, and particularly good friction and wear characteristics. It is a feature.

Claims

A coating agent for a rubbery elastic body comprising a powdery fluororesin, a polycarbonate resin and an isocyanate group-containing 1,2-polybutadiene .