Akzo Nobel N.v.

Alzo N.v.

Wincenty Lambertus Pilaszek

Keimpe Jan Van Den Berg

Tamme Bartels

Jan Wilhelm Moos

Johannes Adrianus Pardoen

The present invention pertains to coating compositions including a particular class of internally blocked polyamines as replacement for traditional blocked and unblocked polyamine crosslinkers. The use of these internally blocked polyamines results in better appearance characteristics and a lower VOC than are generally available with the traditional blocked varieties.

Internally blocked polyamine crosslinkers and coating compositions

The invention pertains to a colorless ketimine or an adduct thereof displaying excellent color stability and usable as a cross-linking agent in a curable coating, impregnating, sealing or bonding composition wherein the ketimine is the adduct of a polyamine having a primary and a secondary amino group and containing at least 3 carbon atoms in a linear chain between both amino groups, and a ketone containing not more than 8 carbon atoms and having methylene groups adjacent to the carbonyl group. The invention also pertains to a process for preparing the ketimine and to the use of the ketimine in a curable composition.

Growing community of inventors

Tholen, Netherlands

Wincenty Lambertus Pilaszek