US 4,287,109 A · Aqueous silicone-polyester resin systems, a process for their production and their use

Abstract

The instant invention relates to an aqueous silicone polyester resin system having a silicone content of at least 30% by weight, based on the solid binder, comprising a polyester resin having an acid number of from 50 to 170; a silicone precondensate with SiOH or SiOR-functionality; or a silicone-polyester-combination resin; having from 0 to 80% by weight, based on the solid binder, of an organic solvent; from 0 to 10% by weight, based on the solid binder, of an emulsion or dispersion auxiliary; a nitrogen base; and optionally at least one pigment or filler. The invention relates also to the production of the silicone polyester-resin system and to the use of the resin in aqueous lacquer materials.

Claims10

Dependent claims

An aqueous silicone polyester resin system having a silicone content of at least 30% by weight, based on the solid binder, comprising (a) (i) a polyester resin having an acid number of from 50 to 170 and a silicone precondensate with SiOH or SiOR-functionality or (a) (ii) a silicone-polyester-copolymer resin having an acid number of from 25 to 110;

(b) based on the solid binder from 0 to 80% by weight of an organic solvent;
(c) from 0 to 10% by weight, based on the solid binder, of an emulsion or dispersion auxiliary;
(d) a nitrogen base;
and (e) optionally at least one pigment or filler, the polyester of (a) (i) or (a) (ii) being formed by reaction of an acid selected from the group consisting of terephthalic acid, isophthalic acid, phthalic acid, pyromellitic acid or trimellitic acid or an ester or anhydride thereof with a polyhydric alcohol selected from the group consisting of ethylene glycol, butane diol, trimethylol propane, glycerine, pentaerythritol and neopentyl glycol.

1 more element

A process for the production of an aqueous silicone polyester resin system which comprises emulsifying or dispersing in water (a) (i) a polyester resin with an acid number of from 50 to 170 and a silicone precondensate with SiOH or SiOR functionality;

or (a) (ii) a silicon-polyester-copolymer resin having an acid number of from 25 to 110;
(b) from 0 to 80% by weight, based on the solid binder, of an organic solvent;
and (c) from 0 to 10% by weight based on the solid binder, of an emulsion or dispersion auxiliary, with the aid of (d) a nitrogen base, to form an aqueous silicone polyester resin system;
optionally adding (e) at least one pigment or filler the polyester of (a) (i) or (a) (ii) being formed by reaction of an acid selected from the group consisting of terephthalic acid, isophthalic acid, phthalic acid, pyromellitic acid or trimellitic acid or an ester or anhydride thereof with a polyhydric alcohol selected from the group consisting of ethylene glycol, butane diol trimethylol propane, glycerine, pentaerythritol and neopentyl glycol;
and adjusting the silicone content in such a way that it amounts to 30 to 80% by weight, based on the solid binder.

2 more elements

Dependencies are inferred from the claim text.

Aqueous silicone-polyester resin systems, a process for their production and their use

Life of this patent

Aqueous silicone-polyester resin systems, a process for their production and their use

Life of this patent

Abstract

Claims10