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    • 112. 发明授权
    • In-reactor stabilization of polyolefins via coated stabilizers
    • 通过涂覆的稳定剂对聚烯烃进行反应器内稳定化
    • US4879141A
    • 1989-11-07
    • US289886
    • 1988-12-27
    • Ananda M. Chatterjee
    • Ananda M. Chatterjee
    • C08F10/00C08J3/20C08J3/22C08K9/08
    • C08J3/201C08F10/00C08J3/226C08K9/08C08J2391/06
    • The present invention includes:(i) a method for making a coated particulate comprising the steps ofheating until liquid a polyolefin wax;fluidizing with a hot gas, additive particles selected from the group comprising an antioxidant, a processing stabilizer, an acid acceptor, and mixtures thereof;spraying the liquid polyolefin wax on the heated fluidized additive particles; andmaintaining the fluidized additive particles at a temperature which is sufficient to prevent the formation of fibers and adequate to form discrete substantially coated additive particles;(ii) a coated particulate made by the above process; and(iii) a process for providing in-reactor stabilization of a polyolefin during a polymerization reaction, using the coated additives prepared by the above described method.
    • 本发明包括:(i)制造涂覆颗粒的方法,包括以下步骤:加热至液体为聚烯烃蜡; 用热气流化,选自抗氧化剂,加工稳定剂,酸受体及其混合物的添加剂颗粒; 将液态聚烯烃蜡喷涂在加热的流化添加剂颗粒上; 并且将流化添加剂颗粒保持在足以防止纤维形成并足以形成离散的基本上涂覆的添加剂颗粒的温度; (ii)通过上述方法制成的涂覆颗粒; 和(iii)使用通过上述方法制备的涂布添加剂,在聚合反应期间提供聚烯烃的反应器内稳定化的方法。