Europaisches Patentamt
European Patent Office
EUROPEAN
0 445
© Publication number:
Office europeen des brevets
A3
APPLICATION
PATENT
int. Ci.5; C08G
© Application number: 91103324.9
738
65/00, C08G 6 5 / 3 2
@ Date of filing: 05.03.91
©
Priority: 06.03.90 IT 1958590
I-28040 Dormelletto, Novara(IT)
Inventor: Pasquale, Antonio
8, Corso Milano
1-28100 Novara(IT)
Inventor: Staccione, Anna Maria, Dr.
14, Viale San Michele del Carso
1-20144 Milan(IT)
Inventor: Marchionni, Giuseppe, Dr.
8, Via Vallisneri
1-20133 Milan(IT)
@ Date of publication of application:
11.09.91 Bulletin 91/37
©
Designated Contracting States:
BE DE ES FR GB NL
©
Date of deferred publication of the search report:
28.10.92 Bulletin 92/44
© Applicant: AUSIMONT S.p.A.
Foro Buonaparte, 31
1-20121 Milano(IT)
©
@ Inventor: Marraccini, Antonio, Dr.
3, Corso Riviera
Representative: Barz, Peter, Dr. et al
Patentanwalte Dipl.-lng. G. Dannenberg Dr.
P. Weinhold, Dr. D. Gudel Dipl.-lng. S.
Schubert, Dr. P. Barz Siegfriedstrasse 8
W-8000 Munchen 40(DE)
© Perfluoropolyethers and processes for preparing them.
©
Described are new perfluoropolyethers of general formula:
AO(CF.O)
a (CF--CF0),
O
X
CO
<
wherein:
A and B
X
(CFO)
(O) ,B
(I)
0
I
X
are end groups,
represents a group (R'0)mR" wherein R' is selected from -CF2-, -CF2-CF2- and
00
00
-CF--CF-,
z i
CF.
R" is a perfluoroalkyl group; and m ranges from 0 to 6.
The invention also relates to processes for preparing said perfluoropolyethers and other classes of nonperoxidic perfluoropolyethers derived therefrom.
Rank Xerox (UK) Business Services
European Patent
Office
J
Application Number
EUROPEAN SEARCH REPORT
EP
DOCUMENTS CONSIDERED TO BE RELEVANT
Citation of document with indication, where appropriate,
Relevant
Category
of relevant passages
to claim
EP-A-0 259 980 (MINNESOTA MINING AND
D.X
1,8-12
MANUFACTURING COMPANY)
* page 18, line 24 - page 23, line 20; claims
1-12; examples *
EP-A-0 393 700 (AUSIM0NT)
91 10 3324
CLASSIFICATION OF THE
APPLICATION ant. Cl.S )
C08G65/00
C08G65/32
1,3-6
* claims; example 14 *
D.A
US-A-3 699 145 (D. SIANESI ET AL. )
* column 4, line 31 - line 68 *
D.A
US-A-3 810 874 ( R. A. MITSCH ET AL. )
* column 1, line 55 - column 2, line 72 *
11
A.P
EP-A-0 393 230 (AUSIM0NT)
* claims *
& IT-A-4 786 989
11
D
TECHNICAL FIELDS
SEARCHED (Int. CI.5 )
C08G
The present search report has been drawn up for all claims
Placeof uarch
Date ofCM*rieUoaofthe iearca
BERLIN
20 AUGUST 1992
CATEGORY OF CITED DOCUMENTS
X: particularly relevant if taken alone
Y: particularly relevant if combined with another
document of the same category
A: technological background
O : non-written disclosure
P : intermediate document
BOEKER R.
T : theory or principle underlying the invention
E : earlier patent document, but published on, or
after the filing date
D : document cited in the application
L : document cited for other reasons
A: member of the same patent family, corresponding
document