Especialidades Químicas

VIALKYD AS 6140sca/49SD60, directly after production, is supplied as a liquid pumpable urethane thixotropic alkyd, which can be used as sole binder or in combination with other alkyds for decorative paints and wood stains. After a while without stirring some thixotropy occurs which affects or inhibits pumpability (see Storage). Concerning gloss retention and weather resistance VIALKYD AS 6140sca/49SD60 shows better properties than polyamide thixotropic alkyds. The thixotropy of urethane thixotropic alkyds can be easier destroyed by stirring than that of polyamide thixotropic resins. Thixotropy can be activated and adjusted by adding a polar solvent, for example propylene glycol. In order to avoid cloudiness we recommend not to add more than four percent propylene glycol (calculated on resin solids). The activated and adjusted thixotropy will stay largely constant after ripening for one week longest. Recommended driers are cobalt (0.05 % metal, calculated on resin solids), zircon (0.15 % metal, calculated on resin solids), and calcium (0.1 % metal, calculated on resin solids). To avoid skinning we recommend the addition of about 1.5 % ADDITOL XL 297 (calculated on resin solids).

CRAYVALLAC PA4 X 20 is a pre-activated amide wax dispersed in a mixture of xylene and alcohols. It is a rheology modifier in paste form for post-addition to solvent-based industrial coatings and industrial wood finishes.

CRAYVALLAC PA3 X 20 is a pre-activated amide wax dispersed in a mixture of xylene and alcohols. It is a rheology modifier in paste form for post-addition to solvent-based industrial coatings and industrial wood finishes.

CRAYVALLAC PA4 BA 20 is a HAPs-free (e.g. Xylene free) alternative to CRAYVALLAC PA4 X 20. This rheology modifier is composed of a pre-activated amide wax dispersed in a mixture of butyl acetate and alcohol. It is a rheology modifier in paste form for post-addition to solvent-based industrial coatings.