Treatment of polymer solutions

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CPC
C08F6/06

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CCHEMISTRY METALLURGY C08Organic compounds C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS C08F6/00Post-polymerisation treatments

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C08F6/06Treatment of polymer solutions

Industries

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Patents Grantslast 30 patents

Information Patent Grant
Washing methods for ethylene-acrylic acid copolymer manufacturing p...
- Patent number 11,905,346
- Issue date Feb 20, 2024
- SK Innovation Co., Ltd.
- Byoung Kyu Kwak
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Method for producing purified polytetrafluoroethylene aqueous dispe...
- Patent number 11,851,519
- Issue date Dec 26, 2023
- Daikin Industries, Ltd.
- Takahiro Taira
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Phase-stabilized ethylene alpha olefin copolymerization process
- Patent number 11,440,983
- Issue date Sep 13, 2022
- Borealis AG
- Mohammad Al-Haj Ali
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Process for the preparation of styrenic polymers having an improved...
- Patent number 11,059,931
- Issue date Jul 13, 2021
- INEOS STYROLUTION GROUP GMBH
- Michiel Verswyvel
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Belt dryer arrangement for drying an aqueous polymer gel and for co...
- Patent number 11,022,370
- Issue date Jun 1, 2021
- BASF SE
- Andrea Karen Bennett
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Method for separating hydrocarbons from polymer
- Patent number 10,988,555
- Issue date Apr 27, 2021
- Borealis AG
- Vasileios Kanellopoulos
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Process for the production of copolymers
- Patent number 10,882,940
- Issue date Jan 5, 2021
- SABIC GLOBAL TECHNOLOGIES B.V.
- Stephan Moyses
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Process for recovery of residual hydrogenation catalyst from hydrog...
- Patent number 10,781,272
- Issue date Sep 22, 2020
- Zeon Chemicals, L.P.
- Soobum Choi
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Method of forming a composite nanoparticle for nanofibers from a po...
- Patent number 10,781,277
- Issue date Sep 22, 2020
- ISTANBUL TECHNICAL UNIVERSITY
- Abdulkadir Sezai Sarac
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Method for producing polymer for electronic material and polymer fo...
- Patent number 10,766,973
- Issue date Sep 8, 2020
- Maruzen Petrochemical Co., LTD
- Tomohiro Masukawa
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Solvent recovery apparatus and solvent recovery method
- Patent number 10,703,875
- Issue date Jul 7, 2020
- LG Chem, Ltd.
- Sung Kyu Lee
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Purification and decolorization of polymers
- Patent number 10,556,999
- Issue date Feb 11, 2020
- Tolmar, Inc.
- Justin Drew Searcy
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Process for producing modified thermosetting polyphenylene ether resin
- Patent number 10,308,749
- Issue date Jun 4, 2019
- Nan Ya Plastics Corporation
- Te-Chao Liao
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Process for preparing objects made of biocompatible hydrogel for us...
- Patent number 9,999,708
- Issue date Jun 19, 2018
- Laurent Laroche
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Method for producing a polymer, polymer solution and polymer
- Patent number 9,862,793
- Issue date Jan 9, 2018
- Asahi Kasei Cehmicals Corporation
- Daisuke Shimizu
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Method for producing polymer
- Patent number 9,738,742
- Issue date Aug 22, 2017
- ASAHI KASEI CHEMICALS CORPORATION
- Yoshifumi Araki
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
RAFT polymers
- Patent number 9,650,450
- Issue date May 16, 2017
- Commonwealth Scientific and Industrial Research Organisation
- John Chiefari
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Fluorinated copolymer and ion exchange membrane
- Patent number 9,604,180
- Issue date Mar 28, 2017
- Asahi Glass Company, Limited
- Yukiko Hattori
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Grant
Method for producing modified polymer and hydrogenated product thereof
- Patent number 9,593,192
- Issue date Mar 14, 2017
- JSR Corporation
- Kentarou Ueba
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Polyolefin manufacturing system including a membrane fractionation...
- Patent number 9,469,582
- Issue date Oct 18, 2016
- Chevron Phillips Chemical Company LP
- Andrew J. Mills
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Polyolefin manufacturing system including a membrane fractionation...
- Patent number 9,211,523
- Issue date Dec 15, 2015
- Chevron Phillips Chemical Company LP
- Andrew J. Mills
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for coagulating sulfonated block copolymers
- Patent number 9,127,132
- Issue date Sep 8, 2015
- Katon Polymers U.S. LLC
- Irwan Hidajat
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Method for producing polyvinyl alcohol resin
- Patent number 9,074,031
- Issue date Jul 7, 2015
- Denki Kagaku Kogyo Kabushiki Kaisha
- Satoshi Watanabe
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Process for preparing aqueous polyacrylic acid solutions
- Patent number 9,056,926
- Issue date Jun 16, 2015
- BASF SE
- Matthias Kleiner
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Method for the stabilization of polyvinylpyrrolidones
- Patent number 8,524,827
- Issue date Sep 3, 2013
- BASF SE
- Karl Kolter
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Solvent transfer process for organic polymers
- Patent number 8,481,613
- Issue date Jul 9, 2013
- Dow Global Technologies LLC
- Douglas C. Greminger
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Semi-continuous integrated process for the production of high impac...
- Patent number 8,404,781
- Issue date Mar 26, 2013
- Polimeri Europa S.p.A.
- Riccardo Inglese
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Production of solutions of vinyl polymers in reactive monomers
- Patent number 8,268,923
- Issue date Sep 18, 2012
- Wacker Chemie AG
- Thomas Kohler
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Process for producing photoresist polymeric compounds
- Patent number 7,816,471
- Issue date Oct 19, 2010
- Daicel Chemical Industries, Ltd.
- Hitoshi Watanabe
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Process for producing photoresist polymeric compounds
- Patent number 7,662,897
- Issue date Feb 16, 2010
- Daicel Chemical Industries, Ltd.
- Hitoshi Watanabe
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...

Patents Applicationslast 30 patents

Information Patent Application
METHOD FOR PRODUCING PURIFIED POLYTETRAFLUOROETHYLENE AQUEOUS DISPE...
- Publication number 20240117077
- Publication date Apr 11, 2024
- DAIKIN INDUSTRIES, LTD.
- Takahiro TAIRA
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
STORAGE METHOD AND USAGE METHOD FOR POLYCARBOXYLIC ACID-BASED POLYM...
- Publication number 20230399444
- Publication date Dec 14, 2023
- Nippon Shokubai Co., Ltd.
- Ikuo SHIMIZU
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
METHOD FOR PRODUCING THIOCARBONYLTHIO GROUP-REMOVED POLYMER
- Publication number 20230391898
- Publication date Dec 7, 2023
- FUJIFILM CORPORATION
- Kenji WADA
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
METHOD FOR PRODUCING ABSORBENT ARTICLES COMPRISING WATER-ABSORBING...
- Publication number 20220296438
- Publication date Sep 22, 2022
- The Procter & Gamble Company
- Carolin Michaela Borgmann
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Application
METHOD FOR PRODUCING PURIFIED POLYTETRAFLUOROETHYLENE AQUEOUS DISPE...
- Publication number 20200255551
- Publication date Aug 13, 2020
- DAIKIN INDUSTRIES, LTD.
- Takahiro TAIRA
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
PROCESS FOR THE PREPARATION OF STYRENIC POLYMERS HAVING AN IMPROVED...
- Publication number 20200190243
- Publication date Jun 18, 2020
- INEOS STYROLUTION GROUP GMBH
- Michiel VERSWYVEL
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Application
BELT DRYER ARRANGEMENT FOR DRYING AN AQUEOUS POLYMER GEL AND FOR CO...
- Publication number 20190226763
- Publication date Jul 25, 2019
- BASF SE
- Andrea Karen Bennett
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Application
METHOD FOR PREPARING AN AQUEOUS POLYACRYLAMIDE SOLUTION
- Publication number 20190144574
- Publication date May 16, 2019
- BASF SE
- Hazel SPRAFKE
- C12 - BIOCHEMISTRY BEER SPIRITS WINE VINEGAR MICROBIOLOGY ENZYMOLOGY MUTATION...
Information Patent Application
PROCESS FOR THE PRODUCTION OF COPOLYMERS
- Publication number 20190135966
- Publication date May 9, 2019
- SABIC Global Technologies B.V.
- Stephan Moyses
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
PROCESS FOR RECOVERY OF RESIDUAL HYDROGENATION CATALYST FROM HYDROG...
- Publication number 20190119411
- Publication date Apr 25, 2019
- ZEON CHEMICALS, L.P.
- Soobum Choi
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
POLYMERIZATION OF 3-METHOXTHIOPHENE (MOT) MONOMER ON POLY-(ACRYLONI...
- Publication number 20180258210
- Publication date Sep 13, 2018
- Istanbul Technical University
- Abdulkadir Sezai SARAC
- B82 - NANO-TECHNOLOGY
Information Patent Application
METHOD FOR PRODUCING POLYMER FOR ELECTRONIC MATERIAL AND POLYMER FO...
- Publication number 20180134819
- Publication date May 17, 2018
- MARUZEN PETROCHEMICAL CO., LTD.
- Tomohiro MASUKAWA
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
METHOD FOR PRODUCING PURIFIED NITRILE RUBBERS
- Publication number 20140329982
- Publication date Nov 6, 2014
- Sven Brandau
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
METHOD FOR PRODUCING MODIFIED POLYMER AND HYDROGENATED PRODUCT THEREOF
- Publication number 20140275422
- Publication date Sep 18, 2014
- JSR Corporation
- Kentarou UEBA
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Application
FLUORINATED COPOLYMER AND ION EXCHANGE MEMBRANE
- Publication number 20140073709
- Publication date Mar 13, 2014
- Asahi Glass Company, Limited
- Yukiko Hattori
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Application
METHOD OF PURIFYING BLOCK COPOLYMERS
- Publication number 20130012661
- Publication date Jan 10, 2013
- LANXESS, INC.
- Judit E. PUSKAS
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
METHOD FOR PRODUCING POLYVINYL ALCOHOL RESIN
- Publication number 20120329949
- Publication date Dec 27, 2012
- DENKI KAGAKU KOGYO KABUSHIKI KAISHA
- Satoshi Watanabe
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
PROCESS FOR PREPARING AQUEOUS POLYACRYLIC ACID SOLUTIONS
- Publication number 20120214941
- Publication date Aug 23, 2012
- BASF SE
- Matthias Kleiner
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
POLYOLEFIN MANUFACTURING SYSTEM INCLUDING A MEMBRANE FRACTIONATION...
- Publication number 20120004489
- Publication date Jan 5, 2012
- Chevron Philips Chemical Company LP
- Andrew J. Mills
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
SOLVENT TRANSFER PROCESS FOR ORGANIC POLYMERS
- Publication number 20110124774
- Publication date May 26, 2011
- Douglas C. Greminger
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
SEMI-CONTINUOUS INTEGRATED PROCESS FOR THE PRODUCTION OF HIGH IMPAC...
- Publication number 20100305264
- Publication date Dec 2, 2010
- POLIMERI EUROPA S.P.A.
- Riccardo Inglese
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
PRODUCTION OF SOLUTIONS OF VINYL POLYMERS IN REACTIVE MONOMERS
- Publication number 20100286347
- Publication date Nov 11, 2010
- Thomas Kohler
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
METHOD OF PURIFYING BLOCK COPOLYMERS
- Publication number 20100256305
- Publication date Oct 7, 2010
- LANXESS, INC.
- Gabor Kaszas
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
PROCESS FOR PRODUCING PHOTORESIST POLYMERIC COMPOUNDS
- Publication number 20100099836
- Publication date Apr 22, 2010
- Hitoshi Watanabe
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
METHOD OF PURIFYING BLOCK COPOLYMERS
- Publication number 20100059452
- Publication date Mar 11, 2010
- LANXESS, INC.
- Gabor Kaszas
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
PROCESS FOR PRODUCING PHOTORESIST POLYMERIC COMPOUNDS
- Publication number 20080268377
- Publication date Oct 30, 2008
- Hitoshi Watanabe
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
Method to purify poly(vinyl alcohol)
- Publication number 20080213210
- Publication date Sep 4, 2008
- Bret F. Hann
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
Method For the Stabilization of Polyvinylpyrrolidones
- Publication number 20080139724
- Publication date Jun 12, 2008
- BASF Aktiengesellschaft
- Karl Kolter
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
Method to purify poly(vinyl alcohol)
- Publication number 20070142620
- Publication date Jun 21, 2007
- Richard Vicari
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
Process for refining crude resin for resist
- Publication number 20060135745
- Publication date Jun 22, 2006
- Hideo Hada
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...

Treatment of polymer solutions

Industry

Parent Industries

Current Industry

Patents Grantslast 30 patents

Washing methods for ethylene-acrylic acid copolymer manufacturing p...

Method for producing purified polytetrafluoroethylene aqueous dispe...

Phase-stabilized ethylene alpha olefin copolymerization process

Process for the preparation of styrenic polymers having an improved...

Belt dryer arrangement for drying an aqueous polymer gel and for co...

Method for separating hydrocarbons from polymer

Process for the production of copolymers

Process for recovery of residual hydrogenation catalyst from hydrog...

Method of forming a composite nanoparticle for nanofibers from a po...

Method for producing polymer for electronic material and polymer fo...

Solvent recovery apparatus and solvent recovery method

Purification and decolorization of polymers

Process for producing modified thermosetting polyphenylene ether resin

Process for preparing objects made of biocompatible hydrogel for us...

Method for producing a polymer, polymer solution and polymer

Method for producing polymer

RAFT polymers

Fluorinated copolymer and ion exchange membrane

Method for producing modified polymer and hydrogenated product thereof

Polyolefin manufacturing system including a membrane fractionation...

Polyolefin manufacturing system including a membrane fractionation...

Process for coagulating sulfonated block copolymers

Method for producing polyvinyl alcohol resin

Process for preparing aqueous polyacrylic acid solutions

Method for the stabilization of polyvinylpyrrolidones

Solvent transfer process for organic polymers

Semi-continuous integrated process for the production of high impac...

Production of solutions of vinyl polymers in reactive monomers

Process for producing photoresist polymeric compounds

Process for producing photoresist polymeric compounds

Patents Applicationslast 30 patents

METHOD FOR PRODUCING PURIFIED POLYTETRAFLUOROETHYLENE AQUEOUS DISPE...

STORAGE METHOD AND USAGE METHOD FOR POLYCARBOXYLIC ACID-BASED POLYM...

METHOD FOR PRODUCING THIOCARBONYLTHIO GROUP-REMOVED POLYMER

METHOD FOR PRODUCING ABSORBENT ARTICLES COMPRISING WATER-ABSORBING...

METHOD FOR PRODUCING PURIFIED POLYTETRAFLUOROETHYLENE AQUEOUS DISPE...

PROCESS FOR THE PREPARATION OF STYRENIC POLYMERS HAVING AN IMPROVED...

BELT DRYER ARRANGEMENT FOR DRYING AN AQUEOUS POLYMER GEL AND FOR CO...

METHOD FOR PREPARING AN AQUEOUS POLYACRYLAMIDE SOLUTION

PROCESS FOR THE PRODUCTION OF COPOLYMERS

PROCESS FOR RECOVERY OF RESIDUAL HYDROGENATION CATALYST FROM HYDROG...

POLYMERIZATION OF 3-METHOXTHIOPHENE (MOT) MONOMER ON POLY-(ACRYLONI...

METHOD FOR PRODUCING POLYMER FOR ELECTRONIC MATERIAL AND POLYMER FO...

METHOD FOR PRODUCING PURIFIED NITRILE RUBBERS

METHOD FOR PRODUCING MODIFIED POLYMER AND HYDROGENATED PRODUCT THEREOF

FLUORINATED COPOLYMER AND ION EXCHANGE MEMBRANE

METHOD OF PURIFYING BLOCK COPOLYMERS

METHOD FOR PRODUCING POLYVINYL ALCOHOL RESIN

PROCESS FOR PREPARING AQUEOUS POLYACRYLIC ACID SOLUTIONS

POLYOLEFIN MANUFACTURING SYSTEM INCLUDING A MEMBRANE FRACTIONATION...

SOLVENT TRANSFER PROCESS FOR ORGANIC POLYMERS

SEMI-CONTINUOUS INTEGRATED PROCESS FOR THE PRODUCTION OF HIGH IMPAC...

PRODUCTION OF SOLUTIONS OF VINYL POLYMERS IN REACTIVE MONOMERS

METHOD OF PURIFYING BLOCK COPOLYMERS

PROCESS FOR PRODUCING PHOTORESIST POLYMERIC COMPOUNDS

METHOD OF PURIFYING BLOCK COPOLYMERS

PROCESS FOR PRODUCING PHOTORESIST POLYMERIC COMPOUNDS

Method to purify poly(vinyl alcohol)

Method For the Stabilization of Polyvinylpyrrolidones

Method to purify poly(vinyl alcohol)

Process for refining crude resin for resist