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    Butadiene resins and process for preparation
    7.
    发明授权
    Butadiene resins and process for preparation 失效
    二苯乙烯树脂和制备方法

    公开(公告)号：US3835075A

    公开(公告)日：1974-09-10

    申请号：US35456373

    申请日：1973-04-26

    Applicant: FIRESTONE TIRE & RUBBER CO

    Inventor： BOUTSICARIS S ,  HAYES R

    IPC: C08C19/00 ,  C08K5/14 ,  C08C11/10 ,  C08D3/08 ,  C08D9/06

    CPC classification number: C08K5/14 ,  C08C19/00 ,  C08L9/00

    Abstract: THIS INVENTION INVOLVES A PROCESS FOR PREPARING HARD, TOUGH, HEAT-RESISTANT PLASTICS BY THE PEROXIDE CURING OF BUTADIENE POLYMERS HAVING A DILUTE SOLUTION VISCOSITY OF 0.19-0.7 AND HAVING A HIGH VINYL CONTENT AND A NARROW MOLECULAR WEIGHT DISTRIBUTION, USING A PEROXIDE WHICH GIVES FREE RADICALS OF THE STRUCTURE R2(CH3)CO, ALTHOUGH THE PEROXIDE CURING OF BUTADIENE POLYMERS GENERALLY RESULTS IN PRODUCTS HAVING ELASTOMERIC POPERTIES AND BEING SWELLABLE IN BENZENE, THE PROCESS OF THIS INVENTION PERMITS VERY RAPID CURING WITHOUT CRAZING OR CRACKING TO GIVE RIGID, HEAT-RESISTANT POLYMERS. THE BUTADIENE POLYMERS HAVE AT LEAST 40%, PREFERABLY AT LEAST 70% BY WEIGHT BUTADIENE THEREIN, ADVANTAGEOUSLY HAVING AT LEAST 80% IN THE VINYL-TYPE OF REPEATING UNITS, THE AVERAGE MOLECULAR WEIGHT BEING AT LEAST 12,500 WITH A MOLECULAR WEIGHT DISTRIBUTION SUCH THAT AT LEAST 50% AND PERFERABLEY AT LEAST 90% IS ABOVE 10,000 MOLECULAR WEIGHT AND AT LAST 95% IS ABOVE 2,000 THE PROPORTION OF PEROXIDE USED, PREFERABLY DICUMYL PEROXIDE, IS 0.5-6, PERFERABLY 1-5 PATS PER 100 PARTS OF POLYMER, AND THE CURING TEMPERATURE IS AT LEAST 250*F (120*C), PREFERABLY 300-350*F. (150-180*C.) THIS PROCESS LENDS ITSELF TO LIQUID COMPOUNDING FOR THE INCORPORATION OF THE PEROXIDE AND ANY MODIFIERS, AND FOR MIXTURE WITH FILLER.

    Rubbery compositions
    8.
    发明授权
    Rubbery compositions 失效
    橡胶组合物

    公开(公告)号：US3769256A

    公开(公告)日：1973-10-30

    申请号：US3769256D

    申请日：1972-04-18

    Applicant: YOSHIMOTO T ,  IMAMURA T ,  TANAKA K

    Inventor： YOSHIMOTO T ,  IMAMURA T ,  TANAKA K

    IPC: C08C19/02 ,  C08K3/00 ,  C08K3/36 ,  C08C11/10 ,  C08D5/00

    CPC classification number: C08K3/36 ,  C08C19/02 ,  C08K3/013 ,  C08L15/00

    Abstract: RUBBERY COMPOSITION IS PREPARED BY MIXING 100 PARTS BY WEIGHT OF A HYDROGENATED HYDROCARBON COPOLYMER HAVING A GLASS TRANSITION TEMPERATURE OF ABOVE -100*C. AND HAVING POLYMERIC MONOMER UNITS WHICH CONSIST OF (1) 5 TO 60% BY WEIGHT OF VINYL-AROMATIC HYDROCARBON UNITS, (2) NOT LESS THAN 10% BY WEIGHT OF HYDROGENATED CONJUGATED DIOLEFIN UNITS AND (3) UNHYDROGENATED CONJUGATED DIOLEFIN UNITS, WHEREIN SAID VINYL-AROMATIC HYDROCARBON UNITS ARE ESSENTIALLY RANDOMLY DISTRIBUTED IN THE POLYMERIC MONOMER UNITS, AND 5 TO 200 PARTS BY WEIGHT OF AN INORGANIC REINFORCING FILLER HAVING A NUMBER AVERAGE PARTICLE DIAMETER OF LESS THAN 500 MU.

    Silica pigments and elastomer-silica pigment masterbatches and production processes relating thereto
    9.
    发明授权
    Silica pigments and elastomer-silica pigment masterbatches and production processes relating thereto 失效

    公开(公告)号：US3686113A

    公开(公告)日：1972-08-22

    申请号：US3686113D

    申请日：1970-07-16

    Applicant: BURKE OLIVER W JUN

    Inventor： BURKE OLIVER W JR

    IPC: C08J3/215 ,  C08K3/36 ,  C08C11/10 ,  C08D9/00

    CPC classification number: C08J3/215 ,  C01P2004/03 ,  C01P2004/50 ,  C08J2321/00 ,  C08K3/36 ,  C08L21/00

    Abstract: CURBING OF SILICA PIGMENT LOSSES AND THE PROMOTION OF UNIFORMITY OF PRODUCT IN THE PREPARATION OF AN ELASTOMER-SILICA PIGMENT MASTERBATCH ARE EFFECTED (A) BY COMBINING (1) AN AQUEOUSLY WET HYDRATED SILICA PIGMENT PRECIPITATE WHICH HAS A BOUND ALKALI CONTENT, WHICH HAS BEEN PREPARED BY PRECIPITATION FROM AN AQUEOUS ALKALI METAL SILICATE SOLUTION, AND WHICH HAS BEEN CONTINUOUSLY MAINTAINED IN AN AQUEOUSLY WET STATE WITHOUT HAVING BEEN DRIED THEREFROM AFTER ITS PRECIPITATION, WITH (2) A QUANTITY OF OLEPHILIC QUATERNARY AMMONIUM MATERIAL, (3) COMBININB THE RESULTING TREATED WET SILICA PIGMENT WITH AN AQUEOUS DISPERSION OF THE ELASTOMER CONTAINING AN ANIONIC DISPERSING AGENT, WITH OR WITHOUT (4) CARBON BLACK AND/OR PROCESSING OIL, AND (5) WITH SELECTED REACTANT-COAGULANT, AND (B) RECOVERING THE RESULTING COAGULUM AS A MASTERBATCH, THE STEPS PRIOR TO (B) HAVING RENDERED THE SERUM OF THE AQUEOUS MIXTURE ESSENTIALLY FREE OF SILICA PIGMENT. PRIOR TO COMBINATION WITH THE ELASTOMER DISPERSION THE TREATED ALKALINE SILICA PIGMENT MAY BE RECOVERED AS A USEFUL DISPERSIBLE ALKALINE SILICA PIGMENT PRODUCT, OR THE WET PIGMENT MAY BE TREATED WITH WATER SOLUBLE SALTS OF ALUMINUM OR ZINC AND/OR WITH MINERAL ACID, AS WELL AS WITH THE OLEOPHILIC MATERIAL, AND AFTER SUCH TREATMENT THE RESULTING PIGMENT COMPOSITION MAY BE RECOVERED FROM THE SLURRY AS A USEFUL DISPERSIBLE SILICA PIGMENT PRODUCT, OR THE SO TREATED WET SILICA PIGMENT MAY BE COMBINED AS IN (3), (4) AND (5) ABOVE, AND BE RECOVERED AS IN (B) ABOVE IN THE FORM OF A MASTERBATCH.

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