HIGH-CONCENTRATION STORAGE-STABLE WATER DISPERSIONS FOR VARNISH AND GLAZE STABILISATION Russian patent published in 2009 - IPC C09K15/00 C09D7/12 

FIELD: chemistry.

SUBSTANCE: invention concerns high-concentration storage-stable water dispersions of active light stabilisation substance or light stabilising and antioxidising agents mix with active substance content over 40 wt % and viscosity of 0.01-2 Pa·s, containing at least one non-ion penetration agent as disperser and polyglycol as dissolution facilitator, as well as 0.2-5 wt % of oleic acid as fluidity enhancer. Additionally the dispersions can include biocide. Also invention concerns method of storage stabilisation enhancement of water dispersions of active light stabilisation substance or light stabilising and antioxidising agents mix, involving mixing of disperser and/or other additives with oleic acid at the frist stage and adding light stabilisation substance or light stabilising and antioxidising agents mix in powder, compressed or granulated form at the second stage, with further dispersion in the presence of oleic acid, disperser and polyglycol and optional additives. In addition invention concerns application of claimed high-concentration water dispersions in obtaining varnish mass.

EFFECT: enhanced storage stability of water dispersions of light stabilisation substance or light stabilising and antioxidising agents mix.

11 cl, 28 ex