申请人:ROHM AND HAAS COMPANY
公开号:EP1403350A1
公开(公告)日:2004-03-31
The present invention provides a powder composition for forming a heat stable wrinkle finish coating and the wrinkle finish coatings formed there from. The composition of the present invention comprises a resin consisting essentially of one or more than one silicone resin having a condensable hydroxyl content of from 2% by weight to 7% by weight, a curing agent, preferably an aminoplast, and a wrinkle finish forming catalyst, preferably an amine salt of triflic acid. In another embodiment, the powder composition of the present invention may comprise a hydroxyl functional resin, preferably a polyester, mixed with the said silicone resin to aid in the adhesion of the coating to a substrate. The composition of the present invention may further comprise up to 60 phr of a filler, such as wollastonite, to aid in heat stability. The coatings of the present invention provide outstanding heat stability at temperatures greater than 350°F and up to 550°F, preferably up to 650°F, for use on automobile or motorcycle exhaust systems, engine covers, manifolds, mufflers and engine parts, stoves, fireplaces, stovepipes, grilles, ovens, and barbecue equipment, boilers, kettles, furnaces, steam lines, heat exchangers and any surface routinely exposed to high heat for an extended time.
本发明提供了一种用于形成热稳定抗皱涂层的粉末组合物及其形成的抗皱涂层。本发明的组合物包括基本上由一种或一种以上硅树脂组成的树脂(其可缩合羟基含量为 2%(重量)至 7%(重量))、固化剂(最好是氨基塑料)和皱面涂层形成催化剂(最好是三氟酸的胺盐)。在另一个实施方案中,本发明的粉末组合物可以包括羟基官能树脂,最好是聚酯,与所述硅树脂混合,以帮助涂层粘附到基材上。本发明的组合物还可进一步包含多达 60 phr 的填料,如硅灰石,以帮助提高热稳定性。本发明的涂层在温度高于 350°F 和高达 550°F(最好高达 650°F)时具有出色的热稳定性,可用于汽车或摩托车排气系统、发动机盖、歧管、消声器和发动机部件、炉灶、壁炉、炉管、格栅、烤箱和烧烤设备、锅炉、水壶、熔炉、蒸汽管道、热交换器以及任何经常长时间暴露在高温下的表面。