Preparation of polyisocyanates containing uretdione groups using phosphine catalysts
申请人:Richter Frank
公开号:US20080262262A1
公开(公告)日:2008-10-23
The invention provides a process for isocyanate dimerization (uretdione formation) and a process for preparing polyisocyanates having a high content of uretdione groups, using specific phosphines as catalysts. The phosphines have one or two tertiary alkyl radicals bound directly to phosphorus.
NOVEL CARBONYLATION LIGANDS AND THEIR USE IN THE CARBONYLATION OF ETHYLENICALLY UNSATURATED COMPOUNDS
申请人:Eastham Graham Ronald
公开号:US20100113255A1
公开(公告)日:2010-05-06
Novel bidentate ligands of general formula (I) are described Formula (I): R represents a hydrocarbyl aromatic structure. The substituent(s) Yx on the aromatic structure has a total X=1-
n
ΣtY
X
of atoms other than hydrogen such that
X-1-n
ΣtY
X
is 4 where n is the total number of substituent(s) Y
X
and tY
X
represents the total number of atoms other than hydrogen on a particular substituent Y
X
. The groups X
1
, X
2
, X
3
and X
4
are joined to Q
1
or Q
2
via tertiary carbon atoms to the respective atom Q
1
or Q
2
; and Q
1
and Q
2
each independently represent phosphorus, arsenic or antimony. A catalyst system and a process for the carbonylation of ethylenically unsaturated compounds utilising the catalyst system is also described.
Die Erfindung betrifft die Verwendung von speziellen Phosphinen als Katalysatoren für die Isocyanatdimerisierung (Uretdionbildung) und ein Verfahren zur Herstellung hoch uretdiongruppenhaltiger Polyisocyanate.
Method for producing a polyisocyanate polymer and a polyisocyanurate plastic
申请人:COVESTRO INTELLECTUAL PROPERTY GMBH & CO. KG
公开号:US11319402B2
公开(公告)日:2022-05-03
The invention relates to a method for producing a polyisocyanate polymer and to the polyisocyanate polymer obtainable from the method and to the use thereof as part of a two-stage method for producing a polyisocyanurate plastic, in particular for producing coatings, films, semi-finished products or molded parts containing such a polyisocyanurate plastic.