EP 1622946 A1 20060208 - CROSSLINKED POLYVINYL ACETALS
Title (en)
CROSSLINKED POLYVINYL ACETALS
Title (de)
VERNETZTE POLYVINYLACETALE
Title (fr)
POLYVINYLACETALS RETICULES
Publication
Application
Priority
- EP 0314109 W 20031212
- DE 10300321 A 20030109
- DE 10319201 A 20030429
Abstract (en)
[origin: WO2004063231A1] The invention relates to methods for producing crosslinked polyvinyl acetals, according to which a polyvinyl alcohol (A1) containing carboxyl groups is crosslinked by (i) reacting the polymer (A1) with at least one polyaldehyde of formula R<9>(CHO)n, and (ii) at least partly esterifying groups of formula (1) and formula (4a) with each other, said steps being performed in any order. The invention further relates to methods for producing crosslinked polyvinyl acetals, according to which a polyvinyl alcohol (A2) is crosslinked by (i) reacting the polymer (A2) with at least one compound of formula (6), (ii) adding at least one compound of formula (4b), (iii) adding a polyaldehyde of formula (5), and (iv) at least partly esterifying groups of formula (1) and structural units derived from the compound of formula (4b) with each other, the radicals R<7>, R<8>, R<9>, R<10>, and R<11>, and the index n being defined as indicated in the description. Also disclosed are the crosslinked polyvinyl acetals obtained by means of the inventive method and particularly appropriate areas of application of said polymers.
IPC 1-7
IPC 8 full level
C08F 8/28 (2006.01)
CPC (source: EP US)
C08F 8/28 (2013.01 - EP US)
Citation (search report)
See references of WO 2004063231A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2004063231 A1 20040729; AU 2003294838 A1 20040810; BR 0317977 A 20051206; EP 1622946 A1 20060208; JP 2006513284 A 20060420; MX PA05007218 A 20051123; US 2006052533 A1 20060309; US 7511096 B2 20090331
DOCDB simple family (application)
EP 0314109 W 20031212; AU 2003294838 A 20031212; BR 0317977 A 20031212; EP 03785800 A 20031212; JP 2004565965 A 20031212; MX PA05007218 A 20031212; US 54201905 A 20050711