Paints surface modifiers

Adhesion promoters are the substances that improve adhesive strength of paints in terms of its resistance against mechanical separation from the painted surface. A large number of different chemical adhesion promoters are available. These include silanes, silicones, titanium compounds, zirconates, amides, imines, phosphates, and specially modified polymers. Furthermore, there are binders, plasticizers, and additives, which have the secondary effect of providing good adhesive strength. Adhesion promoters can be used as additives to the paint formulation, or can be employed in the form of a surface pretreatment. 

AmilHq>e LL ll. [Ajinomoto] Lauroyl lysine surface modifier, coemulsifier, codispersant in cosmetics, medical, painting and other fields filler for ink and paint chelating i ent... 

Polysilicate. [DuPont] Polysilicate binder for refractory, ceramic, metal, inorg. fiber, catalyst support, inorg. paint systems, zinc coatings findustrial applic. glass surface modifier. 

Chem. Descrip. Surface-modified HOPE CAS 9002-88-4 EINECS/ELINCS 200-815-3 Uses PE to enhance composite performance with urethanes, epoxies, polyesters, and other polymers for use in molded parts, adhesives, paints, and coatings... 

Lanco Glidd 4365 surface modifier, decorative paints... 

Modaflow AQ-3025 Resin surface modifier, satin gloss latex paints... 

Polyquaternium-2 Tetraisopropyl titanate surface modifier, cream rinses Polyquaternium-2 surface modifier, elec./electronic Chlorotriphenylsilane Diphenyidichlorosilane Phenyltrichlorosilane surface modifier, electronics Tetraisopropyl titanate surface modifier, film Tetraisopropyl titanate surface modifier, glass Tetraisopropyl titanate surface modifier, graphic arts Tetraisopropyl titanate surface modifier, medical Lauroyl lysine surface modifier, metals Tetraisopropyl titanate surface modifier, paints Lauroyl lysine... 

Paint and lacquer films can also be surface-modified by migration of a dissolved surfactant to the film-air interface during the drying or curing stage. The principle is shown in Figure 17.30 for a UV-polymerizable surfactant. 

The Regulations allow other values of surface absorptivity to be used as an alternative to the standard value of 0.8 if they can be justified. In practice, a pool fire is so smoky that it is probable that soot will be deposited on cool surfaces, modifying conditions there. This is likely to increase the absorptivity but interpose a conduction barrier. The value of 0.8 is consistent with thermal absorptivities of paints and can be considered as approximating the effects of surface sooting. As a surface is heated, the soot may not be retained, and lower values of surface absorptivity could result. 

Let us examine the mechanism of repulsion (dust-repellent coatings) and attraction (dust-collecting coatings) of airborne dust particles as they approach a painted surface and the adhesion of the particles after they come into contact with the surface. Work along these lines was performed by Frederick [223], who studied the electrical properties of dust in relation to the selection of filter fabric materials. In order to evaluate the possibility of binding dust to a substrate due to electrical forces. Frederick divided dusts into three classes. We will modify Frederick s classifications slightly, in that we will consider both dust repulsion and dust collection. 

In the paints and coatings industry, surface modifiers are used to modify the appearance or to improve the performance characteristics of a cured film. Typical performance features include antiblocking, slip, abrasion resistance, matting, and scratch/mar resistance [1],... 

Rohr, F E. (2003) Paint Coat. Ind., Defining and Predicting Performance of Surface Modifiers in Coatings, 19 (10), 110, accessed atwww.pcimag.com. SpecialChem. SA. (2003) Additives for tribological polymers used in bearing applications, article accessed at www. specialchem4polymers.com/resources/ articles. 

Drying of the paints by modifying the interfacial tension, and ensuring that the painted surface remains unaffected by the adverse effects of water... 

Paints, inks, and polishes are all surface modifiers on the one hand and they leave a long-lasting impression on the surfaces on the other hand. The path forward in the development of paints, inks, and polishes is thus determined by the purpose for which these three products are used. 

Tsuge et al. [986] have reported DHS-GC-FID (wide-bore capillary column) in the study of paint coatings (acrylic/melamine resin/(LS-440 or LS-292 (HALS), Tinuvin 1130 or Tinuvin 900, surface modifier, organic solvent)). DHS-GC provides a sensitive technique for quantification of HALS and UVA occluded in cured polymeric materials such as coating paints. The optimum thermal desorption temperature was decided empirically. The system permitted fairly accurate determination of HALS (LS-440 and LS-292), which were almost quantitatively recovered, within an analysis time of 1.5 h. Reproducibility for Tinuvin 900 was less satisfactory, whereas Tinuvin 1130 was not observed because of its extremely low volatility. 

Runs, sags, or curtains excess flow of paint Spray gun too close to work, too much thinner surface too hard or glossy to hold paint Before cure, brush out excess paint and modify spray conditions. After cure, sand and apply another coat. 

Dupont has a line of organic titanates, TY-ZOR TPT, TBT, and TOT, that can be used to modify surfaces so that they are oleophilic or hydrophilic. These products are dispersion aids and promote dispersion of pigments in resins and paints. They modify surfaces to make them more compatible with adhesives and thereby promote adhesion. 

---