申请人:Dow Global Technologies LLC
公开号:EP3072925A1
公开(公告)日:2016-09-28
The present invention provides aqueous polyolefin dispersion compositions for use in metal coatings, such as can coatings, comprising one or more polyolefin base polymer, one or more at least partially neutralized olefinic stabilizing agent having an acid number (AN) of from 80 to 250, preferably, a polyolefin stabilizing agent, such as an olefin-carboxylic acid copolymer or a blend of two such polymers, an optional coupling agent having an acid number (AN) of from 10 to 70 and a melt index of from 500 to 5,000,000 grams of polymer melt passing in 10 minutes through a heated syringe or cylinder at 190 °C with a plunger loaded with 2.16 kg, preferably, a polymer, and a hindered phenolic antioxidant containing an ester linkage dispersed in the polyolefin dispersion composition. The hindered phenolic antioxidant containing an ester linkage can be masterbatched with a polyolefin base polymer, polyolefin stabilizing agent or a coupling agent which is a polymer, melt mixed with the remaining polyolefin composition and then dispersed with aqueous media and a neutralizing agent to form the aqueous dispersion.
本发明提供了用于金属涂料(如罐头涂料)的水性聚烯烃分散组合物,该组合物包含一种或多种聚烯烃基聚合物、一种或多种至少部分中和的烯烃稳定剂,其酸值(AN)为 80 至 250,优选的是一种聚烯烃稳定剂,如烯烃-羧酸共聚物或两种此类聚合物的混合物、一种任选的偶联剂,其酸值(AN)为 10 至 70,熔融指数为 500、可选的偶联剂,其酸值(AN)为 10 至 70,熔融指数为 500 至 5,000,000 克的聚合物熔体在 10 分钟内通过 190 摄氏度加热的注射器或圆筒,柱塞装有 2.16 千克,最好是聚合物,以及分散在聚烯烃分散体组合物中的含有酯连接的受阻酚类抗氧化剂。含有酯连接的受阻酚类抗氧化剂可与聚烯烃基础聚合物、聚烯烃稳定剂或作为聚合物的偶联剂进行母料混合,与剩余的聚烯烃组合物熔融混合,然后与水介质和中和剂分散,形成水分散液。