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    • 5. 发明申请
    • LOW DUST BALANCED HARDNESS ANTIOXIDANT AGGLOMERATES AND PROCESS FOR THE PRODUCTION OF SAME
    • 低平衡平衡硬化抗氧化剂AGGLOMERATES及其生产方法
    • WO00032687A1
    • 2000-06-08
    • PCT/US1999/028871
    • 1999-12-02
    • C09K15/08C08K5/13C08K9/04C09K15/14C09K15/24C09K15/30C09K15/32C08K9/08C08K5/00
    • C08K5/13C08K9/04
    • The present invention is directed to a process for the production of agglomerates of a sterically hindered phenol antioxidant such that the agglomerates have a balanced hardness so as to resist abrasion during conveyance yet being readily dispersed in a host plastic. Such novel agglomerates are achieved through the use of a processing aid consisting of a solvent selected from the group consisting of methylene chloride, chloroform, toluene, acetone, methylethylketone, xylene, cyclohexane, styrene, methylcyclohexane and hexane having at least one gram of antioxidant dissolved therein per 100 mL of solvent and from 20 to 50 weight percent of an alcohol of the formula ROH wherein R is an alkyl group of 1 to 8 carbon atoms and thereafter using the resulting solution of solvent, alcohol, and antioxidant to form a paste of additional portions of the antioxidant which is thereafter agglomerated and dried. The present invention further provides a novel process for controlling the hardness of an agglomerated sterically hindered phenol antioxidant or a mixture of such antioxidant and a secondary phosphite antioxidant through the use of a processing aid wherein there is employed from 20 to 50 weight percent of an alcohol of the formula ROH and wherein the hardness of the resulting agglomerate is inverse to the amount of alcohol employed in the system.
    • 本发明涉及一种制造空间位阻酚抗氧化剂附聚物的方法,使得附聚物具有平衡的硬度,以便抵抗在输送过程中的磨损而易于分散在主体塑料中。 通过使用由二氯甲烷,氯仿,甲苯,丙酮,甲基乙基酮,二甲苯,环己烷,苯乙烯,甲基环己烷和具有至少一克抗氧化剂溶解的己烷组成的组中的溶剂组成的加工助剂来实现这种新型附聚物 其中每100mL溶剂和20至50重量%的式ROH的醇,其中R是1至8个碳原子的烷基,然后使用所得到的溶剂,醇和抗氧化剂溶液形成糊状物 抗氧化剂的另外部分,然后凝结和干燥。 本发明还提供了一种通过使用加工助剂来控制凝聚的空间位阻酚抗氧化剂或这种抗氧化剂和次亚磷酸酯抗氧化剂的混合物的硬度的新方法,其中使用20至50重量%的醇 的式ROH,其中所得附聚物的硬度与体系中使用的醇的量相反。
    • 7. 发明申请
    • LOW DUST BALANCED HARDNESS ANTIOXIDANT AGGLOMERATES AND PROCESS FOR THE PRODUCTION OF SAME
    • 低浓度平衡硬化抗氧化剂AGGLOMERATES及其生产方法
    • WO0032686A9
    • 2001-04-19
    • PCT/US9928830
    • 1999-12-02
    • ALBEMARLE CORP
    • SEMEN JOHN
    • C09K15/08C08K5/00C08K5/134C09K15/14C09K15/16C09K15/24C09K15/32C08K5/13B01J2/00B29B9/00C07C69/612
    • C08K5/005C08K5/1345
    • The present invention is directed to a process for the production of agglomerates of a blend of a sterically hindered phenol antioxidant and an acid neutralizer such that the agglomerates have a balanced hardness to resist abrasion during conveyance yet being readily dispersed in a host plastic. Such agglomerates are achieved through the use of a processing aid consisting of an alcohol of the formula ROH wherein R is an alkyl group of 1 to 8 carbon atoms, either alone or having up to 80% by volume of a cosolvent selected from the group consisting of methylene chloride, chloroform, toluene, acetone, methylethylketone, xylene, cyclohexane, styrene, methylcyclohexane, and hexane. The cosolvent processing aid has at least 1 gram of antioxidant dissolved therein per 100 mL of solvent. The processing aids are used to form a paste of a mixture of antioxidant and an acid neutralizer. The resulting paste is then subjected to agglomeration and the resulting agglomerates are thereafter dried. Through the controlled use of alcohol in the processing aid there is achieved a control on the hardness of the resulting agglomerates which is inverse to the amount of alcohol employed in the system.
    • 本发明涉及一种制备空间位阻酚抗氧化剂和酸中和剂的共混物的附聚物的方法,使得附聚物具有平衡的硬度以抵抗在输送过程中的磨损,同时易于分散在主体塑料中。 这种附聚物通过使用由式ROH的醇组成的加工助剂来实现,其中R是1至8个碳原子的烷基,单独或具有至多80体积%的共溶剂选自: 的二氯甲烷,氯仿,甲苯,丙酮,甲基乙基酮,二甲苯,环己烷,苯乙烯,甲基环己烷和己烷。 共溶剂加工助剂每100mL溶剂中至少溶解有1克抗氧化剂。 加工助剂用于形成抗氧化剂和酸中和剂的混合物的糊剂。 然后将所得糊状物进行附聚,然后干燥所得附聚物。 通过在加工助剂中控制使用醇,可获得所得附聚物的硬度的控制,其与在体系中使用的醇的量相反。