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64 条记录 (耗时 0.017 秒)

    Flocculants and their use
    3.
    发明授权
    Flocculants and their use 失效
    絮凝剂及其用途

    公开(公告)号：US4702844A

    公开(公告)日：1987-10-27

    申请号：US766097

    申请日：1985-08-15

    申请人： Peter Flesher ,  David Farrar ,  Malcolm Hawe ,  John Langley

    发明人： Peter Flesher ,  David Farrar ,  Malcolm Hawe ,  John Langley

    IPC分类号： C02F1/54 ,  C08F2/32 ,  C08J3/03 ,  C08J3/09 ,  C02F1/56

    CPC分类号： C08J3/03 ,  C02F1/54 ,  C08F2/32 ,  C08J3/09 ,  C08J2300/10 ,  C08J2300/14

    摘要： A suspension may be flocculated using a water soluble substantially linear polymer having a single point intrinsic viscosity above 3 and that is a copolymer of two or more ethylenically unsaturated monomers including at least 0.5% by weight of monomer carrying pendant hydrophobic groups. The cationic polymers are novel. Preferred polymers are those in which the hydrophobic group is introduced as an allyl ether.

    摘要翻译： 可以使用具有高于3的单点特性粘度的水溶性基本线性聚合物来絮凝悬浮液，并且其是包含至少0.5重量％的携带侧链疏水基团的单体的两种或更多种烯属不饱和单体的共聚物。 阳离子聚合物是新颖的。 优选的聚合物是其中引入疏水基团作为烯丙基醚的聚合物。

    Water soluble polymers
    5.
    发明授权
    Water soluble polymers 失效
    水溶性聚合物

    公开(公告)号：US4940763A

    公开(公告)日：1990-07-10

    申请号：US113599

    申请日：1987-10-26

    申请人： Peter Flesher ,  David Farrar ,  Malcolm Hawe ,  John Langley

    发明人： Peter Flesher ,  David Farrar ,  Malcolm Hawe ,  John Langley

    IPC分类号： C02F1/54 ,  C08F2/32 ,  C08J3/03 ,  C08J3/09 ,  C08F20/60

    CPC分类号： C08J3/03 ,  C02F1/54 ,  C08F2/32 ,  C08J3/09 ,  C08J2300/10 ,  C08J2300/14

    摘要： Water soluble, substantially linear, polymers having single point intrinsic viscosity above about 3 are formed from an ethylenically unsaturated monomer that includes a group --B.sub.n A.sub.m R where A is propoxy or butoxy, B is ethoxy, n is zero or an integer of 2 to 100 and m is zero or an integer less than n, and R is a hydrophobic group of at least 8 carbon atoms and comonomer selected from non-ionic monomers and dialkylamino alkyl (meth) -acrylates or -acrylamides wherein at least one of the monomers is tertiary amine acid addition or quaternary ammonium salt. The resultant water soluble, high molecular weight, cationic polymers are useful as flocculants and as viscosifiers of aqueous acid solutions such as downhole acid stimulation fluids.

    Calcium carbonate dispersions
    7.
    发明授权
    Calcium carbonate dispersions 失效
    碳酸钙分散体

    公开(公告)号：US4509987A

    公开(公告)日：1985-04-09

    申请号：US442343

    申请日：1982-11-17

    申请人： David Farrar ,  Malcolm Hawe

    发明人： David Farrar ,  Malcolm Hawe

    IPC分类号： B01F17/52 ,  B01J13/00 ,  C01F11/18 ,  C09C1/02 ,  C09D17/00 ,  D21H19/38 ,  D21H19/44 ,  D21H21/52 ,  C09C3/04

    CPC分类号： D21H19/385 ,  C01F11/185 ,  D21H21/52

    摘要： Concentrated (e.g. above 72% by weight) dispersions of calcium carbonate ground to a particle size such that at least 87% by weight of the particles are less than 2 .mu.m in size have a tendency to gel on standing. In the invention this tendency is minimized or eliminated by using, as dispersing agent, a copolymer of from 5 to 75% by weight AMPS and 95 to 25% by weight acrylic acid, or a water soluble salt thereof, having a molecular weight in the range 1000 to 20,000.

    摘要翻译： 浓缩（例如高于72重量％）的碳酸钙分散体研磨至粒径，使得至少87重量％的颗粒的尺寸小于2μm，具有静置凝胶的倾向。 在本发明中，通过使用5至75重量％的AMPS和95至25重量％的丙烯酸或其水溶性盐的共聚物，其分子量为 范围1000到20,000。

    Dispersing agents
    9.
    发明授权
    Dispersing agents 失效
    分散剂

    公开(公告)号：US4792343A

    公开(公告)日：1988-12-20

    申请号：US894344

    申请日：1986-08-07

    申请人： Malcolm Hawe ,  David Farrar

    发明人： Malcolm Hawe ,  David Farrar

    IPC分类号： B01J13/00 ,  B01F17/42 ,  B01F17/52 ,  C08F2/32 ,  C08F220/28 ,  C08F246/00 ,  C08G65/34 ,  C08G65/48 ,  C08J3/03 ,  C08J3/09 ,  C09C3/10 ,  C09K8/24 ,  C10L1/32 ,  C10L10/18

    CPC分类号： C08J3/03 ,  C08F2/32 ,  C08F220/28 ,  C08F246/00 ,  C08J3/09 ,  C09K8/24 ,  C08J2300/10 ,  C08J2300/14 ,  Y10S516/01

    摘要： A dispersing agent for particles in aqueous media comprises a copolymer formed from ethyleneically unsaturated monomers including a water-soluble monomer and a monomer carying a pendant group A.sub.m B.sub.n A.sub.p R in which B is ethyleneoxy and n is at least 2, m and p are each generally 0 and R is a hydrophobic group, generally a C.sub.12-18 alkyl group or alkaryl group. The polymers generally have molecular weights in the range 500-100,000. The dispersants are particularly useful for suspending hydrophobic particles in aqueous media, for example to produce coal slurries, or to suspend hydrophilic particles in aqueous media having high electrolyte concentrations, for example for producing paints and, particularly, drilling muds formed in sea water.

    摘要翻译： 用于水性介质中的颗粒的分散剂包括由乙烯不饱和单体形成的共聚物，其包括水溶性单体和单体侧链侧基AmBnApR，其中B是乙烯氧基，n至少为2，m和p各自通常为0， R是疏水基团，通常为C 12-18烷基或烷芳基。 聚合物通常具有在500-100,000范围内的分子量。 分散剂特别可用于将疏水性颗粒悬浮在水性介质中，例如产生煤浆，或将亲水性颗粒悬浮在具有高电解质浓度的水性介质中，例如用于生产油漆，特别是在海水中形成的钻井泥浆。