公开(公告)号：US11299612B2

公开(公告)日：2022-04-12

申请号：US17046247

申请日：2019-04-17

申请人： W.R. Grace & Co.-Conn.

发明人： John Kalevi Kaarto ,  Jing Zhong ,  Amaia Montoya Goni

IPC分类号： C08L23/16 ,  C08L23/14

摘要： Polypropylene polymer compositions are disclosed that can be formulated to have excellent transparency properties in conjunction with excellent impact resistance properties. The polypropylene polymer compositions are heterophasic compositions containing a first phase polymer combined with a second phase polymer. The first phase polymer is a polypropylene and alpha-olefin copolymer while the second phase polymer is also a polypropylene and alpha-olefin random copolymer. The first phase polymer contains ethylene in an amount less than 5% by weight and is present in an amount greater than the second phase polymer. The second phase polymer has elastomeric properties.

公开(公告)号：US11905347B2

公开(公告)日：2024-02-20

申请号：US16972894

申请日：2019-06-07

申请人： W.R. GRACE & CO.- CONN.

发明人： Matthew John Fedec ,  Jan Willem Van Egmond ,  John Kalevi Kaarto ,  Amaia Montoya-Goni

IPC分类号： C08F210/16 ,  C08F210/06 ,  C08J5/18 ,  C08K5/1575

CPC分类号： C08F210/06 ,  C08F210/16 ,  C08J5/18 ,  C08K5/1575 ,  C08F2500/12 ,  C08F2500/35 ,  C08J2323/14 ,  C08J2323/16

摘要： Propylene and alpha olefin random copolymers are disclosed that have excellent flow characteristics. For instance, the copolymers can be formulated so as to have a melt flow rate of greater than about 45 g/10 min. While still retaining the above flow characteristics, the copolymer can also be formulated to have greater stiffness, low xylene soluble content, and excellent transparency characteristics especially when combined with one or more clarifying agents.

公开(公告)号：US20210070971A1

公开(公告)日：2021-03-11

申请号：US17046247

申请日：2019-04-17

申请人： W.R. Grace & Co.-Conn.

发明人： John Kalevi Kaarto ,  Jing Zhong ,  Amaia Montoya

IPC分类号： C08L23/14

摘要： Polypropylene polymer compositions are disclosed that can be formulated to have excellent transparency properties in conjunction with excellent impact resistance properties. The polypropylene polymer compositions are heterophasic compositions containing a first phase polymer combined with a second phase polymer. The first phase polymer is a polypropylene and alpha-olefin copolymer while the second phase polymer is also a polypropylene and alpha-olefin random copolymer. The first phase polymer contains ethylene in an amount less than 5% by weight and is present in an amount greater than the second phase polymer. The second phase polymer has elastomeric properties.