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    Process for producing readily dispersible sio2 and al2o3 solids
    294.
    发明授权
    Process for producing readily dispersible sio2 and al2o3 solids 失效
    用于生产易分散的sio2和al2o3固体的方法

    公开(公告)号：US3223482A

    公开(公告)日：1965-12-14

    申请号：US38920564

    申请日：1964-08-12

    Applicant: CA NAT RESEARCH COUNCIL

    Inventor： PUDDINGTON IRA E ,  SIRIANNI AURELIO F

    IPC: B01J2/30 ,  C01B33/113 ,  C01B33/18 ,  C08K9/04 ,  C08K9/08 ,  C09C1/28 ,  C09C1/30 ,  C09C1/40 ,  C09C3/00 ,  C09C3/08

    CPC classification number: B82Y30/00 ,  B01J2/30 ,  C01B33/113 ,  C01B33/18 ,  C01P2002/02 ,  C01P2004/32 ,  C01P2004/50 ,  C01P2004/64 ,  C01P2006/10 ,  C01P2006/11 ,  C01P2006/20 ,  C01P2006/22 ,  C08K9/04 ,  C08K9/08 ,  C09C1/309 ,  C09C1/407 ,  C09C3/006 ,  C09C3/043 ,  C09C3/063 ,  C09C3/08 ,  C09C3/10 ,  C10M5/00 ,  C10M2201/00 ,  C10M2201/061 ,  C10M2201/14 ,  C10M2201/16 ,  C10M2201/18 ,  C10M2203/00 ,  C10M2207/021 ,  C10M2207/022 ,  C10M2207/18 ,  C10M2207/282 ,  C10M2207/289 ,  C10M2207/34 ,  C10M2207/40 ,  C10M2207/404 ,  C10M2215/042 ,  C10M2215/102 ,  C10M2219/044 ,  C10M2223/10 ,  C10N2250/10 ,  C10N2250/121 ,  C10N2260/04 ,  C08L21/00

    Abstract: Greases comprise lubricating oils thickened with silica or alumina having a particle size of 5-30 mm coated with a surfactant selected from sorbitan monostearate, polyoxyethylene propyleneglycol monostearate, polyoxyethylene sorbitan tristearate, triethanolamine linoleate, lecithin, alkyl phenol-polyoxyethylene ether adducts of M.Wt. 800-2000, ammonium hydrocarbon sulphonate, a complex having a M.Wt. of less than 2000 of urea and an aliphatic or cycloaliphatic carboxylic acid having 8-22 carbon atoms, or the reaction product in situ of NH4OH and a tall oil acid, lauric acid or oleic acid, of (NH4)2CO3 and palmitic acid, or of urea and an oxidized hydrocarbon oil. The urea complex may be the reaction product of urea and a tall oil acid, oleic, or naphthenic acids. The coating may also contain up to 600 parts of an extender selected from hydrocarbon oils, oxidized hydrocarbon oils, vegetable oils, esters of dibasic acids, polyglycol ethers, and alcohols, having at least 8 carbon atoms (examples are listed). Ammonia and/or glycerol may also be present.ALSO:Silica or alumina having a particle size of 5-30 mm is coated with 10-600 parts by wt. per 100 pts. of the solid of a surfactant selected from sorbitan monostearate, polyoxyethylene propyleneglycol monostearate, polyoxyethylene sorbitan tristearate, triethanolamine linoleate, lecithin, alkyl phenol-polyoxyethylene ether adducts of M.Wt. 800-2000, ammonium hydrocarbon sulphonate, a complex having a M.Wt. of less than 2000 of urea and an aliphatic or cycloaliphatic carboxylic acid having 8-22 carbon atoms, or the reaction product in situ of NH4OH and a tall oil acid, lauric acid, or oleic acid, of (NH4)2CO3 and palmitic acid, or of urea and an oxidized hydrocarbon oil. The urea complex may be the reaction product of urea and a tall oil acid, oleic, or naphthenic acids. The coating may also contain up to 600 parts of an extender selected from hydrocarbon oils, oxidized hydrocarbon oils, vegetable oils, esters of dibasic acids, polyglycol ethers, and alcohols having at least 8 carbon atoms (examples are listed). Ammonia and/or glycerol may also be present. The initial aquasol or gel may be made from Na silicate or aluminate by treatment with H2SO4, HCl, H3PO4 or HAc, or by electrodialysis or ion-exchange. The sol or gel may be mixed with the coating materials in a colloid mill or by stirring, and water may be evaporated off by heating with agitation or by drum drying, or may be frozen out. The surfactant may then be volatilized, leaving the extender coating, which may be modified, e.g. by oxidation. The coated particles are readily dispersed in paints, rubbers, lubricant greases, varnishes, carrier dusts and floor waxes.

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