[go: up one dir, main page]

KR970021106A - 원 위치 (in situ) 폴리에틸렌 블렌드의 제조방법 - Google Patents

원 위치 (in situ) 폴리에틸렌 블렌드의 제조방법 Download PDF

Info

Publication number
KR970021106A
KR970021106A KR1019960048766A KR19960048766A KR970021106A KR 970021106 A KR970021106 A KR 970021106A KR 1019960048766 A KR1019960048766 A KR 1019960048766A KR 19960048766 A KR19960048766 A KR 19960048766A KR 970021106 A KR970021106 A KR 970021106A
Authority
KR
South Korea
Prior art keywords
reactor
catalyst system
metallocene
molecular weight
series
Prior art date
Application number
KR1019960048766A
Other languages
English (en)
Inventor
노리스 포스터 죠오지
에드워드 제임스 데이비드
존 카롤 프레드릭
Original Assignee
카렌 존슨 위진즈
유니온 카바이드 케미칼스 앤드 플라스틱스 테크놀로지 코포레이션
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 카렌 존슨 위진즈, 유니온 카바이드 케미칼스 앤드 플라스틱스 테크놀로지 코포레이션 filed Critical 카렌 존슨 위진즈
Publication of KR970021106A publication Critical patent/KR970021106A/ko

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F10/00—Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F210/00—Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
    • C08F210/16—Copolymers of ethene with alpha-alkenes, e.g. EP rubbers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F4/00—Polymerisation catalysts
    • C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
    • C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
    • C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
    • C08F4/62—Refractory metals or compounds thereof
    • C08F4/64—Titanium, zirconium, hafnium or compounds thereof
    • C08F4/659—Component covered by group C08F4/64 containing a transition metal-carbon bond
    • C08F4/6592—Component covered by group C08F4/64 containing a transition metal-carbon bond containing at least one cyclopentadienyl ring, condensed or not, e.g. an indenyl or a fluorenyl ring
    • C08F4/65922—Component covered by group C08F4/64 containing a transition metal-carbon bond containing at least one cyclopentadienyl ring, condensed or not, e.g. an indenyl or a fluorenyl ring containing at least two cyclopentadienyl rings, fused or not
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2410/00—Features related to the catalyst preparation, the catalyst use or to the deactivation of the catalyst
    • C08F2410/05—Transitioning, i.e. transition from one catalyst to another with use of a deactivating agent
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F4/00—Polymerisation catalysts
    • C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
    • C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
    • C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
    • C08F4/619—Component covered by group C08F4/60 containing a transition metal-carbon bond
    • C08F4/61912—Component covered by group C08F4/60 containing a transition metal-carbon bond in combination with an organoaluminium compound
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F4/00—Polymerisation catalysts
    • C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
    • C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
    • C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
    • C08F4/619—Component covered by group C08F4/60 containing a transition metal-carbon bond
    • C08F4/61916—Component covered by group C08F4/60 containing a transition metal-carbon bond supported on a carrier, e.g. silica, MgCl2, polymer
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F4/00—Polymerisation catalysts
    • C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
    • C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
    • C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
    • C08F4/619—Component covered by group C08F4/60 containing a transition metal-carbon bond
    • C08F4/6192—Component covered by group C08F4/60 containing a transition metal-carbon bond containing at least one cyclopentadienyl ring, condensed or not, e.g. an indenyl or a fluorenyl ring

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Polymerisation Methods In General (AREA)

Abstract

본 발명의 원위치 폴리에틸렌 블렌드의 제조방법은 적어도 하나의 메탈로센기저 촉매 시스템을 하나 이상의 알파-올레핀과 일련의 연이은 두개 이상의 각각의 반응기에서 기체상 중합조건하에서 접촉시키는 것으로 구성되며, (a) 에틸렌을 각각의 반응기로 도입시키고 ; (b) 선택적으로 적어도 3개의 탄소원자를 가지는 알파-올레핀과 디엔을 적어도 하나의 반응기에 도입시키고 ; (c) 일련의 제1반응기 내에서 형성된 에틸렌 중합체 메트릭스 및 촉매의 혼합물을 일련의 연이은 반응기로 이동시키고 ; (d) 각각의 반응기에서의 중합조건은 고분자량의 중합체가 적어도 하나의 반응기에서 형성되고 저분자량의 중합체가 적어도 하나의 다른 반응기에서 형성되도록 하는 것을 조건으로 한다.

Description

원 위치 (in situ) 폴리에틸렌 블렌드의 제조방법
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음

Claims (8)

  1. (a) 각 반응기로 에틸렌을 도입시키고 ; (b) 선택적으로, 적어도 탄소원자 3 이상을 갖는 하나 이상이 알파-올레핀 또는 디엔 공단량체를 적어도 하나의 반응기로 도입시키고 ; (C) 일련의 제1반응기에서 형성된 에틸렌 중합체 메트릭스 및 촉매의 혼합물을 일련의 연이은 반응기로 이동시키고 ; 그리고 (d) 각 반응기에서 중합조건이 초래되는 중합체가 분자량 분포 또는 공단량체 조성 분포에서 또는 둘다에서 다중 형태가 되도록 되는, 중합조건하에서 기체상에서 일련의 두개 이상이 반응기에서 적어도 하나의 메탈로센 기저 촉매 시스템과 하나 이상의 알파-올레핀과 접촉하는 것으로 구성되는 원 위치 폴리에틸렌 블렌드의 생성방법.
  2. 제1항에 있어서, 상기 메탈로센 기저 촉매 시스템은 단지 상기 제1반응기로만 첨가되는 것을 특징으로 하는 방법.
  3. 제1항에 있어서, 상기 메탈로센 기저 촉매 시스템이 각각의 반응기로 첨가되는 것을 특징으로 하는 방법
  4. 제1항에 있어서, 상기 메탈로센 기저 촉매 시스템이 저 분자랑을 갖는 폴리에틸렌을 제조하는 상기 반응기로 첨가되고 지글러/나타 촉매 시스템이고 분자량을 갖는 폴리에틸렌을 제조하는 상기 반응기로 첨가되는 것을 특징으로 하는 방법.
  5. 제1항에 있어서, 상기 메탈로센이 구조식(Ⅰ) 또는 (Ⅱ)에서 설명하는 바와 같이 카바메이트 또는 카르복실레이트인 것을 특징으로 하는 방법.
  6. 제1항에 있어서, 상기 메탈로센 기저 촉매 시스템이 담지되지 않은 시스템인 것을 특징으로 하는 방법.
  7. 제5항에 있어서, 상기 메탈로센 기저 촉매 시스템이 담지되지 않은 시스템인 것을 특징으로 하는 방법.
  8. 제7항에 있어서, 상기 메탈로센이 인데닐 지르코늄 트리스(디에틸 카바메이트)인 것을 특징으로 하는 방법.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019960048766A 1995-10-26 1996-10-26 원 위치 (in situ) 폴리에틸렌 블렌드의 제조방법 KR970021106A (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US54859395A 1995-10-26 1995-10-26
US08/548,593 1995-10-26

Publications (1)

Publication Number Publication Date
KR970021106A true KR970021106A (ko) 1997-05-28

Family

ID=24189545

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019960048766A KR970021106A (ko) 1995-10-26 1996-10-26 원 위치 (in situ) 폴리에틸렌 블렌드의 제조방법

Country Status (14)

Country Link
EP (1) EP0770629A3 (ko)
JP (1) JPH09165406A (ko)
KR (1) KR970021106A (ko)
AR (1) AR004117A1 (ko)
AU (1) AU7051596A (ko)
BR (1) BR9605352A (ko)
CA (1) CA2188722A1 (ko)
CZ (1) CZ314596A3 (ko)
HU (1) HUP9602981A3 (ko)
MX (1) MX9605121A (ko)
PL (1) PL316698A1 (ko)
SK (1) SK138796A3 (ko)
TR (1) TR199600853A2 (ko)
ZA (1) ZA969023B (ko)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU730068B2 (en) * 1997-05-20 2001-02-22 Union Carbide Chemicals & Plastics Technology Corporation A process for preparing an in situ polyethylene blend
EP0881237A1 (en) 1997-05-26 1998-12-02 Fina Research S.A. Process to produce bimodal polyolefins with metallocene catalysts using two reaction zones
GB9712663D0 (en) † 1997-06-16 1997-08-20 Borealis As Process
ES2236921T3 (es) * 1997-08-15 2005-07-16 Dow Global Technologies, Inc. Peliculas producidas a partir de composiciones de polimeros de olefina homogeneas, esencialmente lineales.
CA2247703C (en) * 1998-09-22 2007-04-17 Nova Chemicals Ltd. Dual reactor ethylene polymerization process
EP0989141A1 (en) * 1998-09-25 2000-03-29 Fina Research S.A. Production of multimodal polyethelene
AU1987600A (en) * 1998-12-16 2000-07-03 Borealis Technology Oy Multistep process for preparing polyolefins having high melt strength
US6258903B1 (en) 1998-12-18 2001-07-10 Univation Technologies Mixed catalyst system
US6369176B1 (en) * 1999-08-19 2002-04-09 Dupont Dow Elastomers Llc Process for preparing in a single reactor polymer blends having a broad molecular weight distribution
US6340730B1 (en) 1999-12-06 2002-01-22 Univation Technologies, Llc Multiple catalyst system
CN1271089C (zh) 2000-12-18 2006-08-23 尤尼威蒂恩技术有限责任公司 多成分催化剂聚合体系的启动程序
DK1419185T3 (da) * 2001-07-17 2005-10-03 Innovene Europ Ltd Fremgangsnmåde til polymerisationsregulering
ATE464329T1 (de) 2001-11-19 2010-04-15 Ineos Europe Ltd Polymerisationssteuerungsverfahren
EP1601703B1 (en) * 2004-02-13 2006-07-05 Total Petrochemicals Research Feluy Catalyst deployment in bimodal polyolefin production
US7473745B2 (en) 2005-09-02 2009-01-06 Equistar Chemicals, Lp Preparation of multimodal polyethylene
US8022154B2 (en) 2008-11-06 2011-09-20 Exxonmobil Chemical Patents Inc. Ethylene polymers, their production and use
DE112010002182T5 (de) * 2009-05-29 2012-07-26 Sumitomo Chemical Co., Ltd. Ethylen-α-Olefin-Copolymer, Formgegenstand, Katalysator für die Copolymerisation und Verfahren zur Herstellung eines Ethylen-α-Olefin Copolymers
WO2011002497A1 (en) 2009-06-29 2011-01-06 Chevron Phillips Chemical Company Lp Dual metallocene catalyst systems for decreasing melt index and increasing polymer production rates
KR101741856B1 (ko) 2009-06-29 2017-05-30 셰브론 필립스 케미컬 컴퍼니 엘피 중합반응기에서 중합체 분자량 및 수소 수준 제어를 위한 수소 포집 촉매 사용
MX355375B (es) * 2010-06-14 2018-04-17 Dow Global Tech Llc Star Composiciones de polímero a base de etileno para utilizarse como un componente de combinación en aplicaciones de película de contracción.
US9353196B2 (en) * 2013-11-20 2016-05-31 Equistar Chemicals, Lp Bimodal polymerization process utilizing chromium/silica catalysts
EP3209722A2 (en) 2014-10-21 2017-08-30 Nova Chemicals (International) S.A. Ethylene interpolymer product with dilution index
CA2868640C (en) 2014-10-21 2021-10-26 Nova Chemicals Corporation Solution polymerization process
US10329412B2 (en) 2017-02-16 2019-06-25 Nova Chemicals (International) S.A. Caps and closures

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4302565A (en) 1978-03-31 1981-11-24 Union Carbide Corporation Impregnated polymerization catalyst, process for preparing, and use for ethylene copolymerization
US4293673A (en) 1978-12-28 1981-10-06 Union Carbide Corporation Spheroidal polymerization catalyst, process for preparing, and use for ethylene polymerization
US4684703A (en) 1979-02-27 1987-08-04 Union Carbide Corporation Polymerization catalyst for ethylene homopolymerization
US4482687A (en) 1979-10-26 1984-11-13 Union Carbide Corporation Preparation of low-density ethylene copolymers in fluid bed reactor
US4354009A (en) 1981-07-30 1982-10-12 Union Carbide Corporation Catalyst composition for copolymerizing ethylene
US4814135A (en) 1987-12-22 1989-03-21 Union Carbide Corporation Process for extrusion
US4857600A (en) 1988-05-23 1989-08-15 Union Carbide Corporation Process for grafting diacid anhydrides
US5149738A (en) 1988-11-16 1992-09-22 Union Carbide Chemicals & Plastics Technology Corporation Process for the in situ blending of polymers
US5047468A (en) 1988-11-16 1991-09-10 Union Carbide Chemicals And Plastics Technology Corporation Process for the in situ blending of polymers
TW206240B (ko) * 1990-02-13 1993-05-21 Mitsui Petroleum Chemicals Ind
US5076988A (en) 1990-03-09 1991-12-31 Union Carbide Chemicals And Plastics Technology Corporation Process for the extrusion of low density polyethylene
US5153382A (en) 1991-04-18 1992-10-06 Union Carbide Chemicals & Plastics Technology Corporation Extrusion of thermoplastic copolymers
US5436304A (en) 1992-03-19 1995-07-25 Exxon Chemical Patents Inc. Process for polymerizing monomers in fluidized beds
US5352749A (en) 1992-03-19 1994-10-04 Exxon Chemical Patents, Inc. Process for polymerizing monomers in fluidized beds
BE1005795A3 (fr) * 1992-05-13 1994-02-01 Solvay Procede de polymerisation d'olefines et (co)polymeres a blocs derives d'au moins une olefine.
JP3264333B2 (ja) * 1992-05-28 2002-03-11 出光興産株式会社 エチレン系重合体組成物の製造方法
US5317036A (en) 1992-10-16 1994-05-31 Union Carbide Chemicals & Plastics Technology Corporation Gas phase polymerization reactions utilizing soluble unsupported catalysts
AU686670B2 (en) * 1993-09-17 1998-02-12 Bp Chemicals Limited Gas phase polymerization of olefins
US5588790A (en) 1993-11-01 1996-12-31 Lichti Robert D High speed storage system
IT1273660B (it) * 1994-07-20 1997-07-09 Spherilene Srl Procedimento per la preparazione di polimeri amorfi del propilene
US5527752A (en) * 1995-03-29 1996-06-18 Union Carbide Chemicals & Plastics Technology Corporation Catalysts for the production of polyolefins

Also Published As

Publication number Publication date
HUP9602981A3 (en) 1998-07-28
TR199600853A2 (tr) 1997-05-21
AU7051596A (en) 1997-05-01
CZ314596A3 (en) 1997-05-14
ZA969023B (en) 1997-05-29
MX9605121A (es) 1997-04-30
HUP9602981A2 (en) 1997-10-28
BR9605352A (pt) 1998-07-28
CA2188722A1 (en) 1997-04-27
AR004117A1 (es) 1998-09-30
JPH09165406A (ja) 1997-06-24
PL316698A1 (en) 1997-04-28
EP0770629A2 (en) 1997-05-02
EP0770629A3 (en) 1998-02-25
SK138796A3 (en) 1998-04-08

Similar Documents

Publication Publication Date Title
KR970021106A (ko) 원 위치 (in situ) 폴리에틸렌 블렌드의 제조방법
RU2147310C1 (ru) Полиэтиленовая композиция
DE69326048T2 (de) Ethylencopolymer Zusammensetzung
NO934729L (no) Fremgangsmåte for fremstilling av en blanding som inneholder etylenpolymerer, blanding som inneholder etylenpolymerer, og anvendelse av blandingen
BR9708645A (pt) Processo de polimerização para produzir elastÈmero de poliolefina, cocatalisador gerador de cátion para ativar um procatalisador de metaloceno, elastÈmero de poliolefina possuindo uma combinação única de propriedades e produtos fabricados a partir do mesmo
EP0754708A3 (en) Process for producing an in situ polyethylene blend
KR980002076A (ko) 메탈로센 촉매를 사용하는 중합에서 정전기 조절방법
KR920006429A (ko) 저밀봉 온도를 갖는 결정성 프로필렌 중합체 조성물
KR950701940A (ko) 1-올레핀 (공)중합용 지지촉매(supported catalyst for 1-olefin(s) (co)polymerization)
KR900007885A (ko) 동일계 중합체 혼합 방법
ATE194994T1 (de) Polymerisationsverfahren in einer reaktorenreihe
ES2128001T3 (es) Procedimiento de preparacion de una mezcla a base de polietileno in situ.
NO944525D0 (no) Fremgangsmåte for fremstilling av olefinpolymerer og polymerprodukter fremstilt ved fremgangsmåten
KR960706508A (ko) 촉매 조성물(catalyst compositon)
BR9917354A (pt) Processos para polimerização de estileno e pelo menos uma ou mais olefinas para produzir um interpolìmero de etileno/olefina, e para redução da temperatura pico de fusão de um interpolìmero de etileno/olefina, produto de interpolìmero de etileno/olefina, filme, e , artigo
BR9509319A (pt) Composição de dois compolimeros de propileno olefina processo para sua produção e aplicação de copolímero
KR930701496A (ko) 폴리-1-올레핀의 제조방법
KR890005155A (ko) 광범위한 분자량 분포를 갖는 폴리올레핀 제조용 촉매시스탬
CN101835536B (zh) 具有改进性能的聚乙烯组合物
KR970033038A (ko) 알파-올레핀의 중합용 촉매
CA2103379A1 (en) Catalyst for olefin polymerization, process for olefin polymerization using the same, ethylene/.alpha.-olefin copolymer, graft modified ethylene/.alpha.-olefin copolymer, and ethylene copolymer composition
CA2163681A1 (en) Supported monocyclopentadienyl zirconium catalyst
KR920018097A (ko) 에틸렌-α-올레핀 공중합체의 제조방법
KR960035666A (ko) 트리 내성 케이블
EP0709393A3 (en) Olefin polymerization catalyst and process for producing olefin polymer

Legal Events

Date Code Title Description
PA0109 Patent application

Patent event code: PA01091R01D

Comment text: Patent Application

Patent event date: 19961026

PG1501 Laying open of application
PC1203 Withdrawal of no request for examination
WITN Application deemed withdrawn, e.g. because no request for examination was filed or no examination fee was paid