Swinging out device for mounting and dismounting a blowing lance.

摘要

A coating compsn. has 5-75 wt.% binder in 95-25 wt.% organic solvent, the binder consisting of 50-95 wt.% of an acrylic polymer (I) and 5-50 wt.% of a polyisocyanate (II). (I) is described in US3558564 and is prepd. by polymerising a monomer mixt. from 1-12C alkyl acrylates and methacrylates and styrene, and contg. 10-75 wt.% of monomers producing pendant ester gps. from the polymer backbone of formulae -CO.O-R1-OH (A) and (B) in molar ratio 1:1.5-2.5. R1 = 2-4C satd. hydrocarbon gp.; R2 = phenylene; R3 = 8-10C tert. hydrocarbon gp. In (II) R4 = hexylene gp. Other pref. but opt. additives include (all wt.% w.r.t. binder) (i) 0.05-1.0 of an acid alkyl phosphate, esp. butyl acid phosphate; (ii) 0.01-0.10 of an organic metal catalyst e.g. dibutyltin dilaurate (DBTDL); (iii) 0.5-5 of UV light stabilisers, pref. a blend of benzotriazole and hindered amine types; (iv) pigment (esp. metal flake) in a pigment:binder ratio 0.1-100:1000, opt. with 1-15 wt.% of a specified cellulose acetate-butyrate.