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Pulverlackzusammensetzung enthaltend ein carboxyfunktionalisiertes Silanharz

Coating powder composition for metal substrates contains a carboxy-reactive binder and a carboxy-functional hardener made by hydrolysis and condensation of an aryl-alkoxy-silane and a carboxy-functional silane.
 
: Neumann, G.; Haas, K.

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Frontpage ()

DE 1998-19822618 A: 19980520
DE 1998-19822618 A: 19980520
DE 19822618 C1: 20000224
C09D0005
German
Patent, Electronic Publication
Fraunhofer ISC ()

Abstract
Die Erfindung betrifft eine Pulverlackzusammensetzung, enthaltend als Binder carboxyreaktive Polymere und als Haerter carboxyfunktionelle Siloxanharze sowie gegebenenfalls Zusatzstoffe wie Pigmente und/oder Fuellstoffe und/oder Hitzestabilisatoren und/oder Additive wie Verlauf- und Entgasungsmittel, wobei der Haerter eine Verbindung ist, die durch Hydrolyse und Kondensation eines Organosilans R2SiX2 eines carboxyfunktionalisierten Silans hergestellt wird.

 

DE 19822618 C UPAB: 20000412 NOVELTY - A coating powder composition with (A) a carboxy-reactive polymer binder and (B) a carboxy-functional siloxane resin hardener obtained by hydrolysis and condensation of a mixture of a diaryl-dihydroxy- or diaryl-dialkoxy-silane and a silane with 2 or 3 hydroxy or alkoxy groups and a carboxy-functional organic group. DETAILED DESCRIPTION - A coating powder composition containing (A) a carboxy-reactive binder and (B) a carboxy-functional siloxane resin hardener obtained by hydrolysis and condensation at 0-80 deg. C of a mixture of 50-95 mol% organosilane of formula R2SiX2 (I) and 5-50 mol% carboxy-functional silane of formula RSiX3 (II) and/or RR'SiX2 (III), in which R = optionally substituted aryl; R = a carboxy-functional organic group; X = OH or OR'; R', R' = 1-4C alkyl . USE - Especially for the production of corrosion-proof coatings on metal. ADVANTAGE - Enables the production of corrosion-resistant coatings without chemical pretreatment of the metal substrate.

: http://publica.fraunhofer.de/documents/PX-63364.html