EP 2029632 A1 20090304 - HIGHLY ACETALIZED, COARSELY GROUND POLYVINYL ACETOACETALS
Title (en)
HIGHLY ACETALIZED, COARSELY GROUND POLYVINYL ACETOACETALS
Title (de)
HOCHACETALISIERTE, GROBKÖRNIGE POLYVINYLACETACETALE
Title (fr)
ACÉTALES DE POLYVINYLE HAUTEMENT ACÉTALISÉS À GROS GRAINS
Publication
Application
Priority
- EP 2007055079 W 20070525
- DE 102006025707 A 20060601
Abstract (en)
[origin: WO2007137999A1] The invention relates to highly acetalized, coarse-grained polyvinyl acetals with a degree of acetalization of > 80 mol% and an average grain size of = 100 µm obtainable by acetalization of partially or fully hydrolyzed polyvinyl esters with a degree of hydrolysis of = 70 mol% with acetaldehyde, characterized by the fact that the acetalization is started at a temperature T<SUB>1</SUB> of 0°C = T<SUB>1</SUB> = +20°C and is then continued at a temperature T<SUB>2</SUB> of > +40°C, wherein the temperature T<SUB>2</SUB> is held for a time period of 0.05 to 4 hours and the acetalization is performed in a closed reactor.
IPC 8 full level
C08F 8/28 (2006.01); C09D 11/037 (2014.01); C09D 11/10 (2014.01); C09D 11/106 (2014.01)
CPC (source: EP US)
C04B 35/6342 (2013.01 - EP); C08F 8/28 (2013.01 - EP US)
C-Set (source: EP US)
EP
US
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR MK RS
DOCDB simple family (publication)
DE 102006025707 A1 20071206; CN 101454354 A 20090610; CN 101454354 B 20130821; EP 2029632 A1 20090304; JP 2009538944 A 20091112; JP 5264712 B2 20130814; SG 172612 A1 20110728; TW 200801056 A 20080101; TW I360555 B 20120321; US 2009312516 A1 20091217; US 8309675 B2 20121113; WO 2007137999 A1 20071206
DOCDB simple family (application)
DE 102006025707 A 20060601; CN 200780019970 A 20070525; EP 07729508 A 20070525; EP 2007055079 W 20070525; JP 2009512557 A 20070525; SG 2011036811 A 20070525; TW 96119124 A 20070529; US 30210407 A 20070525