Лако-красочные материалы — производство

Generally, coatings for metal protection should be hard, humidity and chemical resistant, have good adhesion and corrosion resistance, and good gloss in pigmented systems. Water-borne acrylic resins used for metal protection are usually high Tg acrylic or styrene/acrylic copolymers. Because of the nature of the binder, addition of coalescents and plasticisers are essential for proper […]

FORMULATION 7-15 Millbase Primal WL-51 6.84 dispersant 0.88 wetting Agent 0.10 rutile titanium dioxide 13.14 Let down Primal WL-51 (41.5%) 40.55 water 25.06 butyl glycol 9.83 butyl carbitol 1.97 dibutylphthalate 1.58 defoamer 0.05 Total 100.00 Properties PVC 14% nvc 34% pH 7.5 Fully disperse the millbase. Premix the let down components and add to millbase […]

FORMULATION 7-11 Premix 1 NeoCryl A-1049-U (Zeneca) 36.0 water 47.3 Sudranol 100 (Sud. EW) 8.0 NeoCryl BT-21 (Zeneca) 1.5 Premix 2 ethylene glycol 0.3 ethyl diglycol 2.5 tributoxy ethyl phosphate 0.6 butyl benzyl phthalate 2.2 wetting agent 0.5 FC-134 1.0 defoamer 0.1 Total 100.00 Add premix 1 slowly to the premix 2, with good stining. […]

FORMULATION 7-10 Roplex SS-521 (50 % nvc) 85.74 butyl glycol 8.57 water 5.69 Total 100.00 Premixed solvents are added slowly to the stining resin. Roplex SS-521 (Rohm & Haas) is an acrylic emulsion with a MFFT of 45°C. It is recommended that the resin is coalesced with 20 % butyl glycol based on polymer solids. […]

by Roy Usher BSc & Ian Royston BSc 1. Masonry and Floor Coatings The main requirements of masonry paints are good water resistance, exterior durability, yellowing, dirt pick-up resistance and good adhesion to a variety of substrates. A typical masonry paint formulation may be: (i) Good Quality Masonry Paint FORMULATION 7-9 Revacryl 602 19.0 rutile […]

Part A hatting agent 2.0 ethanol 2.5 ethyl glycol 3.0 Part В water 6.0 melamine resin 21.0 pine oil 0.4 tri-butyl phosphate 0.5 slip agent 0.5 de-foamer 0.1 Slowly stir A into В Part C hydroxy acrylate emulsion 50.0 silicone oil (50% in water) 0.5 dimethylethanolamine (to pH = 7.5) 0.2 water 11.8 sodium hexametaphosphate […]

Typical formulations for wood finishes are given below : (i) Water Based Self-Crosslinking Basecoat FORMULATION 7-1 self crosslinking acrylic[12] 86.00 demineralised water 3.00 Dehydran 1293 0.50 Byk-344 0.20 Dapro W-77 0.50 Coatex BR 125 0.20 silica matting agent 0.90 butoxy propanol 5.00 propylene glycol 0.50 demineralised water 2.00 AMP-95 0.10 Mergal K6N 0.10 Polymul ms […]

In most cases, the systems require pH’s in the range 8.0-10.0. If the pH is outside this range, then the stability of the finished product can be seriously affected and viscosities can change quite significantly especially if a pH sensitive thickener is being used. Generally, ammonia or other organic bases are used to control pH […]

These are necessary in most, if not all, formulations if fungal attack in the can and, sometimes, of the dried film is to be avoided. Over the past few years, new products have come onto the market which are far less hazardous than the original materials, many of which were mercury derivatives and were toxic […]

Slip and mar are important properties of the finished dried coating and can be significantly improved by the careful use of silicone additives and waxes. The wrong selection can lead to foaming problems. Both silicones and waxes work by preferentially migrating to the surface so that quite small additions can have a marked effect. Significant […]