Transparent primer PRIMER C

two-componentpolyurethane

Description PRIMER C is recommended for enhancing adhesion of PU based adhesives on oily leathers. It iscompatible for use in connection with either one-part or two-part PU adhesives, such as XM/887, X/165,X165LB, XM /149, XM 81N, EVX169. Primer C is indicated for bonding PU soles to synthetic uppers, by two part foaming. CHARACTERISTICS Composition : synthetic resins in a blend of organic solvents. Mode of setting : solvent release and reaction with an accelerator. Colour : transparent. Solvent blend : ketones and esters. Components : a two-part primer; to be used with the addition of 2 to 3% of Accelerator VKL/50, Desmodur® RE or RFE Pot life : over 4 hours TECHNICAL DATA Solids content : 23 - 25 % Viscosity : 400 - 700 mPa.s (Brookfield spindle2 speed. 50 at 25 °C) Method of use Surface preparation: leather uppers and leather soles are to be carefully roughed. Sometime, especially with very oily leathers, a double roughing may prove necessary, that is roughing with coarse grain sand paper (24) followed by a roughing with steel abrading buffer. Application of the Adhesive: apply by brush or roller spreading machine a coat of Primer C to which 3% of Accelerator should have been previously added. Drying of Primer: allow to dry at least 5 to 10 minutes before spreading the PU based adhesive. With oily leathers with very high grease content it may prove necessary to apply a slight heating to the surface by means of an infra red rays lamp or an hot air drought. Once the priming coat has dried out, then the suitable PU adhesive can be applied. Thinner: ST/121