A process for the preparation of a condensation polymer

The invention relates to a process to prepare a condensation polymer containing ester groups and at least one amide group in the backbone, having at least one beta -alkyl-substituted beta -hydroxyalkylamide end group and having a hydroxy alkylamide functionality between 2 and 250. A polyvalent carboxylic acid reacts with an alkanolamine to form a hydroxy-alkylamide from which a polyesteramide is obtained through polycondensation. The obtained polymer may, for example, be used in a thermosetting powder paint composition or in a toner composition

Werkwijze en inrichting voor de bereiding van een vaste bindmiddelsamenstelling

De uitvinding heeft betrekking op een werkwijze voor de bereiding van een vaste bindmiddelsamenstelling, op basis van een hars en vernetter, welke bij reactie een vluchtige component doen ontstaan, waarbij de hars en de vernetter gemengd worden in een reactor waaruit tijdens de gelijktijdige aanwezigheid van de hars en de vernetter geen vluchtige component vrijkomt.De uitvinding heeft tevens betrekking op een inrichting voor de bereiding van een vaste bindmiddel­ samenstelling omvattende een reactor voorzien van middelen om de dampafvoer te regelen, optioneel voor­ zien van middelen om gas aan de reactor toe te voegen en/of middelen om de viscositeit te meten, en omvattende een middel om het product dat de reactor verlaat te koelen.De uitvinding heeft betrekking op een werkwijze voor de bereiding van een vaste bindmiddelsamenstelling, op basis van een hars en vernetter, welke bij reactie een vluchtige component doen ontstaan, waarbij de hars en de vernetter gemengd worden in een reactor waaruit tijdens de gelijktijdige aanwezigheid van de hars en de vernetter geen vluchtige component vrijkomt. De uitvinding heeft tevens betrekking op een inrichting voor de bereiding van een vaste bindmiddelsamenstelling omvattende een reactor voorzien van middelen om de dampafvoer te regelen, optioneel voorzien van middelen om gas aan de reactor toe te voegen en/of middelen om de viscositeit te meten, en omvattende een middel om het product dat de reactor verlaat te koelen

Powder paint composition

The invention relates to a powder paint composition comprising: a) a compound comprising hydroxyalkylamide units, b) a stabilizer, and c) a compound capable of reacting with hydroxyalkylamide units, whereby said compound a) compris­ing hydroxyalkylamide units is a branched condensation polymer containing ester groups having at least one amide group in the backbone, having at least one hydroxyalkilamide group and having a weight average molecular mass of at least 800 g/mol and, whereby said stabilizer b) is at least one phenolic anti-oxidant according to Formula (1) wherein R1is an, optionally substituted, alkyl or cycloalkyl with at least 4 C-atoms, R2 and R3 are identical or different, and can independently of each other be H, or (C1-C18) 0 (cyclo)alkyl radicals, Z is an mono-, bis- or multifunctional organic group, and n=l-4, whereby when n=l, Z contains at least 3 C-atoms or heteroatoms. The invention also relates to the powder coating obtained after curing of the powder paint composition and to wholly and partly coated substrates

A process for the preparation of a heat curable paint binder composition

The invention relates to a process for the preparation of a heat curable paint binder composition containing a compound comprising hydroxyalkylamidegroups. At first a compound comprising hydroxyalkyl amide units and carboxylic acid units is obtained by reacting a cyclic anhydride and an alkanolamine in a mixing device and that secondly the binder composition is obtained by mixing the compound and a polymer in a second mixing device.<br/

A process for the preparation of a condensation polymer

The invention relates to a process to prepare a condensation polymer containing ester groups and at least one amide group in the backbone, having at least one beta -alkyl-substituted beta -hydroxyalkylamide end group and having a hydroxy alkylamide functionality between 2 and 250. A polyvalent carboxylic acid reacts with an alkanolamine to form a hydroxy-alkylamide from which a polyesteramide is obtained through polycondensation. The obtained polymer may, for example, be used in a thermosetting powder paint composition or in a toner composition

Seed oils rich in linolenic acid as renewable feedstock for environment-friendly crosslinkers in powder coatings

In the work described, seed oils rich in linolenic acid were used for the synthesis of aliphatic oxiranes. The oils studied were linseed (Linum usitatissimum) oil, Canadian linseed oil and the oil of Lallemantia iberica. The oils contained 54.1, 60.2 and 68.0% of linolenic acid, respectively, and showed high theoretical iodine values of 211,226 and 236 g/hg. Unsaturations in the oils were used to introduce epoxides by epoxidation with in situ generated peroxyacetic acid. The epoxidized oils, showing high percentages of oxirane oxygen (9.4, 10.0 and 10.7%, were applied as crosslinkers in powder-coating formulations. The major advantage of these types of crosslinkers is that they are neither toxic nor mutagenic, in contrast with the widely applied synthetic triglycidyl isocyanurate (TGIC) crosslinkers. However, two potential problems exist when aliphatic oxiranes are compared with conventional TGIC systems. A decrease in glass transition temperature (T(g)) of the powder formulation and a higher degree of yellowing of the coating are often observed. In this paper the effects of using oils containing high linolenic acid contents on the yellowing of the coating and the T(g) of the powder, are studied. It appeared that aliphatic oxiranes are suitable as environment-friendly crosslinkers in powder-coating systems