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297 条记录 (耗时 0.013 秒)

    Process of forming polyolefin fibers
    1.
    发明授权
    Process of forming polyolefin fibers 失效
    形成聚烯烃纤维的工艺

    公开(公告)号：US3849387A

    公开(公告)日：1974-11-19

    申请号：US23542072

    申请日：1972-03-16

    申请人： FOWELLS R ,  DAMON R ,  COMA J

    发明人： DAMON R ,  COMA J ,  FOWELLS R

    IPC分类号： B01J3/04 ,  B01J19/18 ,  D01D5/38 ,  D01D5/40 ,  C08F3/06 ,  C08F3/10 ,  C08F15/04

    CPC分类号： B01J19/18 ,  B01J3/04 ,  B01J2219/00033 ,  B01J2219/00094 ,  D01D5/38 ,  D01D5/40

    摘要： 1. A PROCESS OF PREPARING FIBERS OF POLYOLEFINS COMPRISING POLYMERIZING AN OLEFIN IN THE PRESENCE OF A COORDINATION CATALYST SYSTEM IN A REACTION MEDIUM WHOSE SOLUBILITY PARAMETER IS SUCH THAT ($S-$P)2 IS LESS THAN ABOUT 3.0 CAL./CC. AND AT A TEMPERATURE LESS THAN THE MELT DISSOLUTION TEMPERATURE OF THE POLYOLEFIN TO BE FORMED, AND SUBJECTING SAID POLYMERIZATION SOLUTION TO A POSITIVE SHEAR STRESS OF GREATER THAN ABOUT ZERO POUND (FORCE)/ SQUARE FOOT UP TO ABOUT 0.1 POUND (FORCE)/SQUARE FOOT DURING POLYMERIZATION, THE MAGNITUDE OF SAID SHEAR STRESS BEING SUFFICIENTLY GREAT TO PRECIPITATE THE POLYOLEFIN AS A FIBROUS GEL HAVING A FIBRILLAR STRUCTURE OF FIBROUS POLYOLEFIN IN WHICH THE INTERCONNECTING CAPILLARY SPACES ARE FILLED WITH REACTION MEDIUM, SAID MAGNITUDE SHEAR STRESS BEING LESS THAN THAT AMOUNT WHICH WOULD CAUSE THE DIRECT FORMATION OF A SUBSTANTIAL AMOUNT OF DISCRETE FIBERS DIRECTLY RECOVERABLE WITHOUT REQUIRING FURTHER PROCESSING STEPS, AND SUBSEQUENTLY SUBJECTING SAID FIBROUS GEL FORMED DURING POLYMERIZATION TO A SHEAR STRESS OF GREATER THAN ABOUT 0.1 POUND (FORCE)/SQUARE FOOT, THEREBY PRODUCING DISCRETE, DIRECTLY RECOVERABLE, POLYOLEFIN FIBERS WITHOUT REQUIRING FURTHER PROCESSING STEPS.

    Process and apparatus for measuring the composition of fluid plastics
    2.
    发明授权
    Process and apparatus for measuring the composition of fluid plastics 失效
    用于测量流体塑料组合物的方法和装置

    公开(公告)号：US3846073A

    公开(公告)日：1974-11-05

    申请号：US13284471

    申请日：1971-04-08

    申请人： NAT DISTILLERS CHEM CORP

    发明人： BAUM H ,  STILES C

    IPC分类号： G01N27/22 ,  G01N33/00 ,  C08F15/04 ,  G01R27/26

    CPC分类号： G01N27/223

    摘要： 1. A PROCESS FOR DETERMINING THE PROPORTION OF MONOMERS IN A COPOLYMER, WHEREIN THE MONOMERS HAVE DIFFERENT DIELECTRIC CONSTANTS, SAID PROCESS COMPRISING CONTACTING A CAPACITIVE DETECTOR RESPONSIVE TO THE DIELECTRIC CONSTANT OF FLUIDS WITH A FLUID STREAM OF SAID COPOLYMER IN A ZONE OF RELATIVELY CONSTANT TEMPERATURE AND PRESSURE,

    MEASURING THE CAPACITANCE OF THE CAPACITIVE DETECTOR WHILE IN CONTACT WITH THE FLUID STREAM AND COMPARING THE VALUE OF THE CAPACITANCE SO MEASURED WITH A PREDETERMINED REFERENCE VALUE.

    D R A W I N G

    Graft copolymerization of alpha-monoolefin copolymer rubbers to make gum plastics
    4.
    发明授权
    Graft copolymerization of alpha-monoolefin copolymer rubbers to make gum plastics 失效
    阿尔法 - 单螺旋共聚物橡胶的共聚合制备塑料塑料

    公开(公告)号：US3819765A

    公开(公告)日：1974-06-25

    申请号：US78798468

    申请日：1968-12-30

    申请人： UNIROYAL INC

    发明人： O SHEA F

    IPC分类号： C08F255/00 ,  C08F255/04 ,  C08F285/00 ,  C08F15/04

    CPC分类号： C08F285/00 ,  C08F255/00

    摘要： A TWO-STAGE METHOD OF GRAFTING ON EPM OR EPDM RUBBER TO MAKE A TOUGH, IMPACT-RESISTANT GUM PLASTIC: (I) A PORTION ONLY OF RESIN FORMING MONOMER (E.G., STYRENE, ACRYLONITRILE) IS FIRST "PREGRAFTED" IN SOLUTION ON THE EPM OR EPDM RUBBER SPINE; (II) THE REMAINING AMOUNT OF RESIN-FORMING MONOMER IS COMBINED WITH THE LIGHTLY GRAFTED RUBBER, AND SUBJECTED TO FURTHER GRAFT POLYMERIZATION TO PRODUCE THE FINAL GUM PLASTIC. NEW GRAFT COPOLYMERS OF RESIN-FORMING MONOMERS ON ETHYLENE/PROPYLENE/5-ETHYLIDENE-2 - NORBORNENE TERPOLYMER RUBBER ARE ALSO DISCLOSED.

    Petroleum resins
    5.
    发明授权
    Petroleum resins 失效
    石油树脂

    公开(公告)号：US3817953A

    公开(公告)日：1974-06-18

    申请号：US31115272

    申请日：1972-12-01

    申请人： ICI LTD

    发明人： YOUNGER D

    IPC分类号： C07C1/00 ,  C07C7/00 ,  C07C7/177 ,  C07C11/02 ,  C07C67/00 ,  C08F240/00 ,  C10G50/00 ,  C10G57/02 ,  C08F15/04 ,  C08F15/42

    CPC分类号： C07C7/00 ,  C07C7/005 ,  C08F240/00

    摘要： In a process in which a C5 fraction from a cracked naphtha or gas oil is polymerised with the help of a Friedel-Crafts catalyst to produce a petroleum resin, the C5 fraction is first heated to a temperature of 160* to 250*C for a period of up to 5 hours and is then held at a temperature in the range 100* to 160*C for a further period of up to 5 hours.

    摘要翻译： 在将来自裂化石脑油或瓦斯油的C5馏分借助Friedel-Crafts催化剂聚合以生产石油树脂的过程中，首先将C5馏分加热至160-250℃， 时间长达5小时，然后在100℃至160℃的温度下再保持5小时。

    Process for the preparation of ethylene polymer or copolymer
    8.
    发明授权
    Process for the preparation of ethylene polymer or copolymer 失效
    制备乙烯聚合物或共聚物的方法

    公开(公告)号：US3781253A

    公开(公告)日：1973-12-25

    申请号：US3781253D

    申请日：1972-05-15

    申请人： MITSUI PETROCHEMICAL IND

    发明人： MORI A ,  KASHIWA N ,  TOKUZUMI T ,  NARA H ,  KATAOKA T ,  HOROTA Y ,  FUJIMURA H

    IPC分类号： C08F10/02 ,  C08F1/42 ,  C08F3/06 ,  C08F15/04

    CPC分类号： C08F10/02 ,  C08F10/00 ,  C08F210/16 ,  Y10S526/905 ,  C08F4/6548

    摘要： A PROCESS FOR THE PREPARATION OF POLYETHYLENE WHICH COMPRISES POLYMERIZING ETHYLENE IN SOLUTION PHASE (THE SOLUTION PHASE EXCLUDES A POLYMER OR COPOLYMER EXISTING IN SOLID PHASE, BUT INCLUDED SUCH POLYMER IN MOLTEN STATE), IN A POLYMERIZATION SOLVENT OF LINEAR OR CYCLIC PENTANE, HEXANE, OR HEPTANE IN THE PRESENCE OF A CARRIER-SUPPORTING ZIEGLER CATALYST, WHILE MAINTAINING THE POLYMER CONCENTRATION IN THE POLYMERIZATION SYSTEM AT NOT HIGHER THAN 20% BY WEIGHT AND CONTROLLING THE POLYMERIZATION TEMPERATURE BY FORCEDLY CIRCULATING AN INERT GAS THROUGH THE POLYMERIZATION ZONE; SUBJECTING THE LIQUID PHASE REACTION PRODUCT CONTAINING THE FORMED ETHYLENE POLYMER OR COPOLYMER IN MOLTEN STATE TO A LOWER PRESSURE NOT HIGHER THAN THE POLYMERIZATION PRESSURE, WHICH ALLOWS VAPORI-

    ZATION OF THE SOLVENT IN THE LIQUID PHASE, TO EVAPORATE AND SEPARATE THE SOLVENT; AND RECOVERING THE SOFTENED OR MOLTEN STATE ETHYLENE POLYMER OR COPOLYMER FROM WHICH THE SOLVENT HAS BEEN REMOVED.

    Monomer recovery in polymerization process
    9.
    发明授权
    Monomer recovery in polymerization process 失效
    单体回收聚合工艺

    公开(公告)号：US3770709A

    公开(公告)日：1973-11-06

    申请号：US3770709D

    申请日：1969-08-14

    申请人： EXXON RESEARCH ENGINEERING CO

    发明人： TEGGE B ,  ROSENBAUM B ,  PLAINS M

    IPC分类号： C08F2/00 ,  C08F6/00 ,  C08F15/04 ,  C08F15/40

    CPC分类号： C08F6/003 ,  C08L23/02

    摘要： IN ACCORDANCE WITH CERTAIN OF ITS ASPECTS, THE NOVEL METHOD OF THIS INVENTION FOR RECOVERING UNREACTED HIGHER ALPHA-OLEFIN FROM A LIQUID EFFUENT EXITING A POLYMERIZATION REACTION CONTAINING CATALYST, UNREACTED ETHYLENE, UNREACTED HIGHER ALPHA-OLEFIN, AND A CEMENT OF ETHYLENEHIGHER ALPHA-OLEFIN COPOLYMER IN A LIQUID DILUENT-SOLVENT WHEREIN SAID HIGHER ALPHA-OLEFIN HAS A BOILING POINT AT LEAST 50*C. BELOW THE BOILING POINT OF SAID DILUENT-SOLVENT MAY COMPRISE: (A) WITHDRAWING SAID LIQUID EFFUENT FROM SAID POLYMERIZATION REACTION; (B) DIRECTLY FLASHING SAID LIQUID EFFUENT THEREBY SEPARATING, AS OVERHEAD, DILUENT-SOLVENT AND UNREACTED ETHYLENE AND UNREACTED HIGHER ALPHA-OLEFIN AND, AS BOTTOMS, A CONCENTRATED POLYMER CEMENT CONTAINING A MINOR PORTION OF UNREACTED HIGHER ALPHA-OLEFIN; (C) RECOVERING SAID UNREACTED HIGHER ALPHA-OLEFIN; AND (D) RECOVERING SAID CONCENTRATED POLYMER CEMENT.