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BR8900650A - Processo para a preparacao de uma membrana microporosa assimetrica de um polimero vinilico aromatico sindiotactico e membrana microporosa assimetrica - Google Patents

Processo para a preparacao de uma membrana microporosa assimetrica de um polimero vinilico aromatico sindiotactico e membrana microporosa assimetrica

Info

Publication number
BR8900650A
BR8900650A BR898900650A BR8900650A BR8900650A BR 8900650 A BR8900650 A BR 8900650A BR 898900650 A BR898900650 A BR 898900650A BR 8900650 A BR8900650 A BR 8900650A BR 8900650 A BR8900650 A BR 8900650A
Authority
BR
Brazil
Prior art keywords
microporous membrane
asymmetric microporous
syndiotactical
preparation
aromatic vinyl
Prior art date
Application number
BR898900650A
Other languages
English (en)
Inventor
Ritchie A Wessling
Chieh-Chun Chau
Alan F Burmester
Original Assignee
Dow Chemical Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dow Chemical Co filed Critical Dow Chemical Co
Publication of BR8900650A publication Critical patent/BR8900650A/pt

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
    • B01D71/06—Organic material
    • B01D71/28—Polymers of vinyl aromatic compounds

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
BR898900650A 1988-02-11 1989-02-10 Processo para a preparacao de uma membrana microporosa assimetrica de um polimero vinilico aromatico sindiotactico e membrana microporosa assimetrica BR8900650A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/154,777 US4859339A (en) 1988-02-11 1988-02-11 Microporous membranes of syndiotactic vinylaromatic polymers

Publications (1)

Publication Number Publication Date
BR8900650A true BR8900650A (pt) 1989-10-10

Family

ID=22552733

Family Applications (1)

Application Number Title Priority Date Filing Date
BR898900650A BR8900650A (pt) 1988-02-11 1989-02-10 Processo para a preparacao de uma membrana microporosa assimetrica de um polimero vinilico aromatico sindiotactico e membrana microporosa assimetrica

Country Status (5)

Country Link
US (1) US4859339A (pt)
EP (1) EP0328012B1 (pt)
JP (1) JPH024840A (pt)
BR (1) BR8900650A (pt)
DE (1) DE68907931T2 (pt)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5169893A (en) * 1988-09-01 1992-12-08 The Dow Chemical Company Mixtures containing stereoregular polystyrene
US4927535A (en) * 1989-07-14 1990-05-22 The Dow Chemical Company Microporous membranes from isotactic polystyrene and syndiotactic polystyrene
DE69023176T2 (de) * 1989-07-14 1996-04-04 Dow Chemical Co Isotrope oder anisotrope mikroporöse Membranen aus syndiotaktischem Polystyrol und Herstellungsverfahren.
US4980101A (en) * 1989-07-14 1990-12-25 The Dow Chemical Company Anisotropic microporous syndiotactic polystyrene membranes and a process for preparing the same
US4976901A (en) * 1989-07-14 1990-12-11 The Dow Chemical Company Microporous membranes from isotactic polystyrene and syndiotactic polystyrene
US5571415A (en) * 1994-11-02 1996-11-05 Rohm And Haas Company Method for preparing porous polymer structures
US6183856B1 (en) * 1996-07-25 2001-02-06 Mobil Oil Corporation Opaque polymeric films and processes for making same
US5889069A (en) * 1997-07-15 1999-03-30 The Dow Chemical Company High temperature syndiotactic styrene polymer foam
JP5466383B2 (ja) * 2008-08-08 2014-04-09 出光興産株式会社 Ｎ，ｎ−ジメチルカルバミン酸アルキルの製造方法、並びにｎ，ｎ−ジメチルカルバミン酸アルキルを含有する洗浄剤およびポリマー溶液

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB895082A (en) * 1960-03-12 1962-05-02 Membranfilter Ges G M B H Improvements in or relating to the production of membrane filters
US3567810A (en) * 1968-04-01 1971-03-02 Amicon Corp Process for making high-flow anisotropic membranes
US3615024A (en) * 1968-08-26 1971-10-26 Amicon Corp High flow membrane
US3709774A (en) * 1970-05-13 1973-01-09 Gen Electric Preparation of asymmetric polymer membranes
US3896061A (en) * 1972-08-16 1975-07-22 Toray Industries Semi-permeable membranes, their preparation and their use
US3876738A (en) * 1973-07-18 1975-04-08 Amf Inc Process for producing microporous films and products
US4020230A (en) * 1975-10-03 1977-04-26 The Dow Chemical Company Microporous polyethylene hollow fibers and process of preparing them
US4539256A (en) * 1982-09-09 1985-09-03 Minnesota Mining And Manufacturing Co. Microporous sheet material, method of making and articles made therewith
US4673695A (en) * 1985-10-08 1987-06-16 The United States Of America As Represented By The United States Department Of Energy Low density microcellular foams
JPS62187708A (ja) * 1985-11-11 1987-08-17 Idemitsu Kosan Co Ltd スチレン系重合体の製造法
JPH07119306B2 (ja) * 1988-01-13 1995-12-20 出光興産株式会社 熱可塑性樹脂発泡体とその製造方法

Also Published As

Publication number Publication date
DE68907931D1 (de) 1993-09-09
EP0328012A3 (en) 1990-05-09
US4859339A (en) 1989-08-22
DE68907931T2 (de) 1994-01-20
EP0328012A2 (en) 1989-08-16
JPH024840A (ja) 1990-01-09
EP0328012B1 (en) 1993-08-04

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Legal Events

Date Code Title Description
FF Decision: intention to grant
KD Notifcation of receipt (letter patent)
HO Change of classification

Free format text: INT.CL.6 C08J 5/18 E B01D 13/04

FG9A Patent or certificate of addition granted
B21A Patent or certificate of addition expired [chapter 21.1 patent gazette]

Free format text: PATENTE EXTINTA EM 10/02/2009