Polyester silicates
AssigneeAkzo Nobel Coatings International B.V.
InventorsSteven Alister Nixon, Susan Pritchard, Sarah Donnely
Life of this patent
Estimating the term…
Abstract
Provided herein are coating compositions comprising the reaction product of a tetra alkyoxyorthosilicate or a partially condensed oligomer thereof and a polyester resin containing hydroxyl groups. The coating compositions advantageously have a high solid content and/or low volatile organic content (VOC) in combination with a low viscosity. The coating compositions are capable of drying quickly, curing in ambient conditions and may be formulated in one-pack.
Claims20
An ambient curing coating composition comprising a reaction product of a tetra alkyoxyorthosilicate or a partially condensed oligomer thereof and a polyester resin containing hydroxyl groups, wherein
- (a) the polyester resin has a number average molecular weight of between about 1250 and about 4000, and a hydroxyl equivalent weight of between about 800 and about 4500, and
- (b) the ratio of alkoxy groups on the tetra alkyoxyorthosilicate to hydroxyl groups on the polyester resin containing hydroxyl groups is in the range of 2:1 to 40:1.
A silicate-modified polyester resin obtained by dealcoholisation condensation of a tetra-alkoxyorthosilicate or a partially condensed oligomer thereof and a polyester resin which contains hydroxyl groups, wherein
- (a) the polyester resin has a number average molecular weight of between about 1250 and about 4000, and a hydroxyl equivalent weight of between about 800 and about 4500, and
- (b) the ratio of alkoxy groups on the tetra alkyoxyorthosilicate to hydroxyl groups on the polyester resin containing hydroxyl groups is in the range of 2:1 to 40:1.
Dependencies are inferred from the claim text.