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公开(公告)号：US20240240400A1
公开(公告)日：2024-07-18
申请号：US18619339
申请日：2024-03-28
发明人： John Claude Husband , Per Svending , David Robert Skuse , Tafadzwa Motsi , Mikko Likitalo , Alan Coles
IPC分类号： D21C9/00 , D21B1/30 , D21B1/32 , D21D1/20 , D21H11/04 , D21H11/18 , D21H11/20 , D21H15/02 , D21H19/38
CPC分类号： D21C9/007 , D21B1/30 , D21B1/32 , D21C9/001 , D21D1/20 , D21H5/1236 , D21H11/04 , D21H11/18 , D21H11/20 , D21H19/38 , D21H19/385
摘要： Methods of preparing partially dried or essentially completely dried compositions comprising microfibrillated cellulose and an inorganic particulate material may include microfibrillating a fibrous substrate comprising cellulose in an aqueous environment by grinding in the presence of an inorganic particulate material to form an aqueous composition comprising microfibrillated cellulose and inorganic particulate material, wherein the fibrous substrate comprising cellulose has a Canadian Standard freeness equal to or less than 450 cm, wherein the fibrous substrate to the inorganic particulate material are in a ratio of about 99.5:0.5 to about 0.5:99.5, and wherein the microfibrillated cellulose has a fibre steepness of from about 20 to about 50; by treating the aqueous composition comprising microfibrillated cellulose and inorganic particulate material to remove at least a portion or substantially all of the water of the aqueous composition to form a partially dried or essentially completely dried composition comprising microfibrillated cellulose and inorganic particulate material.
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公开(公告)号：US11970817B2
公开(公告)日：2024-04-30
申请号：US17826700
申请日：2022-05-27
发明人： John Claude Husband , Per Svending , David Robert Skuse , Tafadzwa Motsi , Mikko Likitalo , Alan Coles
IPC分类号： D21C9/00 , D21B1/30 , D21B1/32 , D21D1/20 , D21H11/04 , D21H11/18 , D21H11/20 , D21H15/02 , D21H19/38
CPC分类号： D21C9/007 , D21B1/30 , D21B1/32 , D21C9/001 , D21D1/20 , D21H5/1236 , D21H11/04 , D21H11/18 , D21H11/20 , D21H19/38 , D21H19/385
摘要： A method for preparing an aqueous suspension may include providing a fibrous substrate comprising cellulose having a Canadian Standard freeness equal to or less than 450 cm3, and microfibrillating the fibrous substrate in an aqueous environment by grinding in the presence of a grinding medium consisting essentially of mullite. The grinding may be carried out in the absence of grindable inorganic particulate material. The grinding medium may be present in an amount of at least about 10% by volume of the aqueous environment. The microfibrillated cellulose may have a fibre steepness of from about 20 to about 50.
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公开(公告)号：US20180371694A1
公开(公告)日：2018-12-27
申请号：US16117685
申请日：2018-08-30
发明人： John Claude Husband , Per Svending , David Robert Skuse , Tafadzwa Motsi , Mikko Likitalo , Alan Coles
摘要： A method for preparing an aqueous suspension may include providing a fibrous substrate comprising cellulose having a Canadian Standard freeness equal to or less than 450 cm3, and microfibrillating the fibrous substrate in an aqueous environment by grinding in the presence of a grinding medium consisting essentially of mullite. The grinding may be carried out in the absence of grindable inorganic particulate material. The grinding medium may be present in an amount of at least about 10% by volume of the aqueous environment. The microfibrillated cellulose may have a fibre steepness of from about 20 to about 50.
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公开(公告)号：US10100464B2
公开(公告)日：2018-10-16
申请号：US14843516
申请日：2015-09-02
发明人： John Claude Husband , Per Svending , David Robert Skuse , Tafadzwa Motsi , Mikko Likitalo , Alan Coles
摘要： A method for preparing an aqueous suspension may include providing a fibrous substrate comprising cellulose having a Canadian Standard freeness equal to or less than 700 cm3, and microfibrillating the fibrous substrate in an aqueous environment by grinding in the presence of a grinding medium which is to be removed after completion of grinding. The grinding may be carried out in the absence of grindable inorganic particulate material, wherein the grinding medium is present in an amount of at least about 10% by volume of the aqueous environment, and wherein the microfibrillated cellulose has a fiber steepness of from about 20 to about 50.
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公开(公告)号：US20220364305A1
公开(公告)日：2022-11-17
申请号：US17826700
申请日：2022-05-27
发明人： John Claude Husband , Per Svending , David Robert Skuse , Tafadzwa Motsi , Mikko Likitalo , Alan Coles
摘要： A method for preparing an aqueous suspension may include providing a fibrous substrate comprising cellulose having a Canadian Standard freeness equal to or less than 450 cm3, and microfibrillating the fibrous substrate in an aqueous environment by grinding in the presence of a grinding medium consisting essentially of mullite. The grinding may be carried out in the absence of grindable inorganic particulate material. The grinding medium may be present in an amount of at least about 10% by volume of the aqueous environment. The microfibrillated cellulose may have a fibre steepness of from about 20 to about 50.
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公开(公告)号：US11377791B2
公开(公告)日：2022-07-05
申请号：US16117685
申请日：2018-08-30
发明人： John Claude Husband , Per Svending , David Robert Skuse , Tafadzwa Motsi , Mikko Likitalo , Alan Coles
摘要： A method for preparing an aqueous suspension may include providing a fibrous substrate comprising cellulose having a Canadian Standard freeness equal to or less than 450 cm3, and microfibrillating the fibrous substrate in an aqueous environment by grinding in the presence of a grinding medium consisting essentially of mullite. The grinding may be carried out in the absence of grindable inorganic particulate material. The grinding medium may be present in an amount of at least about 10% by volume of the aqueous environment. The microfibrillated cellulose may have a fibre steepness of from about 20 to about 50.
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