FI65790C - Flexibla och/eller i organiska loesningsmedel loesliga p-oxibenzoylsampolyestrar laempliga foer press- och ytbelaeggningsprodukter - Google Patents

Flexibla och/eller i organiska loesningsmedel loesliga p-oxibenzoylsampolyestrar laempliga foer press- och ytbelaeggningsprodukter Download PDF

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Publication number
FI65790C
FI65790C FI793407A FI793407A FI65790C FI 65790 C FI65790 C FI 65790C FI 793407 A FI793407 A FI 793407A FI 793407 A FI793407 A FI 793407A FI 65790 C FI65790 C FI 65790C
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polyester
copolyester
structural unit
para position
molecular weight
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FI793407A
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English (en)
Finnish (fi)
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FI65790B (fi
FI793407A (fi
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Roger S Storm
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Dart Ind Inc
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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00Polymeric products of isocyanates or isothiocyanates
    • C08G18/06Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08Processes
    • C08G18/10Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00Polymeric products of isocyanates or isothiocyanates
    • C08G18/06Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08Processes
    • C08G18/10Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
    • C08G18/12Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step using two or more compounds having active hydrogen in the first polymerisation step
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00Polymeric products of isocyanates or isothiocyanates
    • C08G18/06Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/65Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00Polymeric products of isocyanates or isothiocyanates
    • C08G18/06Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/67Unsaturated compounds having active hydrogen
    • C08G18/68Unsaturated polyesters
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00Polymeric products of isocyanates or isothiocyanates
    • C08G18/06Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72Polyisocyanates or polyisothiocyanates
    • C08G18/74Polyisocyanates or polyisothiocyanates cyclic
    • C08G18/76Polyisocyanates or polyisothiocyanates cyclic aromatic
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00Polymeric products of isocyanates or isothiocyanates
    • C08G18/06Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72Polyisocyanates or polyisothiocyanates
    • C08G18/74Polyisocyanates or polyisothiocyanates cyclic
    • C08G18/76Polyisocyanates or polyisothiocyanates cyclic aromatic
    • C08G18/7614Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring
    • C08G18/7621Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring being toluene diisocyanate including isomer mixtures
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G63/00Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/68Polyesters containing atoms other than carbon, hydrogen and oxygen
    • C08G63/688Polyesters containing atoms other than carbon, hydrogen and oxygen containing sulfur
    • C08G63/6882Polyesters containing atoms other than carbon, hydrogen and oxygen containing sulfur derived from hydroxy carboxylic acids
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B11/00Automatic controllers
    • G05B11/01Automatic controllers electric
    • G05B11/012Automatic controllers electric details of the transmission means
    • G05B11/016Automatic controllers electric details of the transmission means using inductance means
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00Variable transformers or inductances not covered by group H01F21/00
    • H01F29/14Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03FAMPLIFIERS
    • H03F9/00Magnetic amplifiers
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/31504Composite [nonstructural laminate]
    • Y10T428/3154Of fluorinated addition polymer from unsaturated monomers
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/31504Composite [nonstructural laminate]
    • Y10T428/31678Of metal
    • Y10T428/31681Next to polyester, polyamide or polyimide [e.g., alkyd, glue, or nylon, etc.]
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/31504Composite [nonstructural laminate]
    • Y10T428/31678Of metal
    • Y10T428/31692Next to addition polymer from unsaturated monomers
    • Y10T428/31699Ester, halide or nitrile of addition polymer
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/31504Composite [nonstructural laminate]
    • Y10T428/31786Of polyester [e.g., alkyd, etc.]

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Polyesters Or Polycarbonates (AREA)
  • Paints Or Removers (AREA)

Claims (21)

1. P-oxibensoylsampolyester, som är flexibel och/eller löslig i organiska lösningsmedel och som lämpar sig för an-vändning i press- och ytbeläggningsprodukter, kanne-t e c k n a d därav, att strukturenheter av följande form-ler upprepas _ O - 0 —^ \— C —— — -* x Γ o 0 "! +;o C—J— och (c) -F-°-0~s—O-0— i vilka x:y är mellan 0,1 - 10, x:z är mellan 0,1 - 10, y:z är mellan 0,9 - 1,1 och x + y + z är mellan 20 - 600 och karbonylgrupperna i strukturenheten (B) ligger i meta-eller para-position i förhällande tili varandra och i strukturenheten (C) är syreatomer i meta- eller para-position i förhällande tili svavelatomen. 65790 18
2. Polyester enligt krav 1, kännetecknad därav, att karbonylgrupperna i strukturenheten (B) är i para-position i förh&llande till varandra.
3· Polyester enligt krav 1, kännetecknad därav, att syreatomerna i strukturenheten (C) är i para-position i förh&llande till svavelatomen.
4. Polyester enligt krav 2, kännetecknad därav, att syreatomerna i strukturenheten (C) är i para-position i förhällande till svavelatomen.
5. Polyester enligt krav 1, kännetecknad därav, att x:y är mollan 0,4 - 1,5-
6. Polyester enligt krav 1, kännetecknad därav, att y:z är mellan 0,95 - 1,05·
7. Polyester enligt krav 1, kännetecknad därav, att x + y + z är mellan 20 - 200 och polyesterns molekylvikt är mellan 3 000 - 30 000.
8. Polyester enligt krav 3» kännetecknad därav, att karbonylgrupperna i strukturenheten (B) ligger i meta-position i förhällande till varandra.
9. Polyester enligt krav 3» kännetecknad därav, att x:y och x:z är mellan 0,4 - 1,5, y:z är mellan 0,95 - 1*05, x+y+z är mellan 20 - 200 och polyesterns molekylvikt är mellan 3 000 - 30 000.
10. Polyester enligt krav 1, kännetecknad därav, att x:y och x:z är ca. 1 , y:z är ca. 1 och polyesterns molekylvikt är mellan 3 500 - 25 000. 19 65790
11. Polyester enligt krav 1, kännetecknad därav, att x:y och x:z är ca. 0,5, y:z är ca. 1 och polyesterns nolekylvikt är mellan 5 500 - 25 000.
12. Polyester enligt patentkrav 1, kännetecknad därav, att x:y är 0,2 - 2 och x:z är 0,2 - 2.
13- Plexibel polymerprodukt av pressad p-oxibensoylsampolyes-ter, kännetecknad däraV, att i polyestern upp-repas enheter av följande strukturformler: (a) J— o——c —L- *- O Jx (B) —^_C—och (c> -f-°-0~s—o ° -» z · där x:y är 0,1-10; x:z är 0,1-10 och y:z är 0,9-1,1 och x + y + z är 20-600, och karbonylgrupperna i strukturenheten (B) ligger i raeta- eller paraposition i förhällande till varand-ra och i strukturenheten (C) är syreatomerna i meta- eller paraposition i förhällande till svavelatomen.
14. PreSsad p-oxibensoylsampolyesterprodukt enligt patentkrav 13, kännetecknad därav, att x:y och x:z är ca 1, y:z är ca 1 och polyesterns molekylvikt är 3500 - 25 000.
15- Av p-oxibensoylsampolyester framställd, för substrat an-passad, flexibel plastytbeläggning, som täi skrämning, kännetecknad därav, att i polyestern upprepas enheter av följande strukturformler: 65790 20 _ o - o —^ ^*~ c-- Γ 0 0 -I X (B) +5-ö- C—4— och (O -|j- o ——s-0-- Z där x:y är 0,1-10; x:z är 0,1-10 och y:z är 0,9-1»1 och x + y + z är 20-600, och karbonylgrupperna i strukturenheten (B) ligger i meta- eller paraposition i förhällande tili varand-ra och i strukturenheten (C) är syreatomerna i meta- eller paraposition i förhällande tili svavelatomen.
16. Ytbeläggning enligt patentkrav 15» kanne-t e c k n a d därav, att den dessutom innehäller en poly-tetrafluoretylenpolymer, varvid förhällandet mellan p-oxibensoylsampolyestern och polytetrafluoretylenpolymeren är 1:10 - 1:1.
17· Ytbeläggning enligt patentkrav 16, k ä n n e -t e c k n a d därav, att i sampolyesterpolymeren är x:y och x:z ca 1, y:z är ca 1 och polyesterns molekylvikt är 3 500 -25 000 och förhällandet mellan sampolyestern och polytetra-fluoretylenen är 1:7 — 1:3·
18. Plexibel ytbeläggning enligt patentkrav 15, känne-t e c k n a d därav, att i sampolyestern är x:y och x:z ca 0,5, y:z ca 1 och polyesterns molekylvikt är 3 500 - 25 000.
19- Lösning gjord i p-oxibensoylsampolyesterns organiska lös-ningsmedel, kännetecknad därav, att i sampolyestern upprepas strukturenheter enligt foljande struktur-formler:
FI793407A 1978-11-09 1979-10-31 Flexibla och/eller i organiska loesningsmedel loesliga p-oxibenzoylsampolyestrar laempliga foer press- och ytbelaeggningsprodukter FI65790C (fi)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/959,275 US4219629A (en) 1978-11-09 1978-11-09 P-Oxybenzoyl copolyesters comprising thiodiphenol components and having improved flexibility and solubility in organic solvents
US95927578 1978-11-09

Publications (3)

Publication Number Publication Date
FI793407A FI793407A (fi) 1980-05-10
FI65790B FI65790B (fi) 1984-03-30
FI65790C true FI65790C (fi) 1984-07-10

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FI793407A FI65790C (fi) 1978-11-09 1979-10-31 Flexibla och/eller i organiska loesningsmedel loesliga p-oxibenzoylsampolyestrar laempliga foer press- och ytbelaeggningsprodukter

Country Status (29)

Country Link
US (1) US4219629A (sv)
JP (1) JPS5566924A (sv)
AR (1) AR218561A1 (sv)
AT (1) AT383605B (sv)
AU (1) AU519289B2 (sv)
BE (1) BE879936A (sv)
BR (1) BR7907240A (sv)
CA (1) CA1129586A (sv)
CH (1) CH643274A5 (sv)
DE (1) DE2945370C3 (sv)
DK (1) DK472879A (sv)
ES (1) ES8103763A1 (sv)
FI (1) FI65790C (sv)
FR (1) FR2441638A1 (sv)
GB (1) GB2035347B (sv)
GR (1) GR66809B (sv)
IE (1) IE49111B1 (sv)
IL (1) IL58613A (sv)
IT (1) IT1209132B (sv)
LU (1) LU81879A1 (sv)
MA (1) MA18637A1 (sv)
NL (1) NL186173C (sv)
NO (1) NO150121C (sv)
NZ (1) NZ192016A (sv)
PH (1) PH18753A (sv)
PL (1) PL128087B1 (sv)
PT (1) PT70434A (sv)
SE (1) SE440661B (sv)
ZA (1) ZA795796B (sv)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5594930A (en) * 1979-01-10 1980-07-18 Sumitomo Chem Co Ltd Preparation of aromatic polyester by improved bulk polymerization process
JPS55149321A (en) * 1979-05-11 1980-11-20 Sumitomo Chem Co Ltd Preparation of oxybenzoylcopolyester
US4626557A (en) * 1982-07-26 1986-12-02 Dart Industries, Inc. Plastic ovenware containing talc
IE54564B1 (en) * 1982-07-26 1989-11-22 Dart Ind Inc Polyester moulding compositions and ovenware therefrom
US4510205A (en) * 1983-05-26 1985-04-09 Eastman Kodak Company Copolyesterethers coated with saran
US4606930A (en) * 1984-03-02 1986-08-19 Sumitomo Chemical Company, Limited Method for treating fibers
JPS61199821A (ja) * 1985-03-01 1986-09-04 住友化学工業株式会社 非粘着性を有するプラスチックオ−ブンウエア
US5015723A (en) * 1988-09-02 1991-05-14 Sumitomo Chemical Company, Limited Process for producing aromatic polyesters
JP2847188B2 (ja) * 1988-11-04 1999-01-13 住友化学工業株式会社 芳香族ポリエステルの製造方法
US5173562A (en) * 1990-10-29 1992-12-22 Chisso America Inc. Liquid crystal polymer composition containing bisphenol A in combination with 4,4'-thiodiphenol

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2600376A (en) * 1949-11-26 1952-06-17 Eastman Kodak Co Polmesters of hydroxybenzoic acids
US2728747A (en) * 1952-10-22 1955-12-27 Gen Mills Inc Polyester resins
US3216970A (en) * 1956-12-14 1965-11-09 Gevaert Photo Prod Nv Production of linear aromatic polyesters containing isophthalic acid
GB907647A (en) * 1960-02-29 1962-10-10 Ici Ltd New aromatic polyesters
US3240735A (en) * 1961-09-14 1966-03-15 Eastman Kodak Co Thermoplastic polyesters of bisphenols and dicarboxylic acids having increased modulus of elasticity due to presence of stiffness improving additives
US3310601A (en) * 1963-06-20 1967-03-21 Shell Oil Co Curing polyepoxides with a mixture of difunctional and polyfunctional mercaptans
US3640965A (en) * 1968-10-02 1972-02-08 Union Carbide Corp Thermoplastic sulfur-containing polymers
US3644593A (en) * 1969-05-28 1972-02-22 Carborundum Co Compositions of matter comprising oxybenzoyl polyesters and polyfluorinated addition polymers
US3637595A (en) * 1969-05-28 1972-01-25 Steve G Cottis P-oxybenzoyl copolyesters
US3600350A (en) * 1970-04-20 1971-08-17 Du Pont Poly(p-benzamide) composition,process and product
US3857814A (en) * 1970-12-08 1974-12-31 Carborundum Co Branched aromatic polyesters and cross-linked derivatives thereof
US3873502A (en) * 1972-04-18 1975-03-25 Dow Chemical Co Cycloaliphatic polythiols and compositions containing same
JPS5629703B2 (sv) * 1973-04-03 1981-07-10
JPS505443A (sv) * 1973-05-18 1975-01-21
US3972852A (en) * 1973-08-07 1976-08-03 Teijin Limited Process for preparing aromatic polyesters from diphenols
US4102864A (en) * 1976-02-02 1978-07-25 Monsanto Company Polyesters of 1,2-bis(hydroxyphenyl) ethanes and aromatic dicarboxylic acids

Also Published As

Publication number Publication date
BR7907240A (pt) 1980-07-08
PT70434A (en) 1979-12-01
IE792151L (en) 1980-05-09
GR66809B (sv) 1981-04-30
NL186173C (nl) 1990-10-01
IL58613A0 (en) 1980-02-29
FI65790B (fi) 1984-03-30
BE879936A (fr) 1980-03-03
ES485810A0 (es) 1981-03-16
DE2945370B2 (de) 1981-05-21
CA1129586A (en) 1982-08-10
DE2945370A1 (de) 1980-05-14
PL219467A1 (sv) 1980-12-01
ATA721279A (de) 1986-12-15
ES8103763A1 (es) 1981-03-16
GB2035347B (en) 1982-11-24
GB2035347A (en) 1980-06-18
FI793407A (fi) 1980-05-10
PL128087B1 (en) 1983-12-31
NO150121C (no) 1984-08-22
IT7927142A0 (it) 1979-11-08
SE7909263L (sv) 1980-05-10
NO150121B (no) 1984-05-14
NL186173B (nl) 1990-05-01
CH643274A5 (de) 1984-05-30
DK472879A (da) 1980-05-10
NO793604L (no) 1980-05-12
US4219629A (en) 1980-08-26
FR2441638B1 (sv) 1984-12-28
AT383605B (de) 1987-07-27
AU519289B2 (en) 1981-11-19
LU81879A1 (fr) 1980-04-22
NL7908241A (nl) 1980-05-13
JPS5645930B2 (sv) 1981-10-29
IE49111B1 (en) 1985-08-07
JPS5566924A (en) 1980-05-20
IT1209132B (it) 1989-07-10
ZA795796B (en) 1981-07-29
MA18637A1 (fr) 1980-07-01
AU5236679A (en) 1980-05-15
PH18753A (en) 1985-09-19
DE2945370C3 (de) 1982-04-01
AR218561A1 (es) 1980-06-13
IL58613A (en) 1982-11-30
NZ192016A (en) 1981-04-24
SE440661B (sv) 1985-08-12
FR2441638A1 (fr) 1980-06-13

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