Surface modifiers rosin

A number of applications of modified rosin esters depend on a surface-gloss effect. Although such use in structural surface coatings has decreased over the years, numerous formulations still incorporate rosin esters for gloss, leveling flow, brushability, and other characteristics. The esters also contribute gloss character-... 

Figure 8-17 Working model of the protein-protein interactions in focal adhesions determined by in vitro binding experiments and immunolocalization. In addition, several interactions are of relatively low affinity in solution but may be enhanced at the membrane surface. Abbreviations are ECM, extracellular matrix PM, plasma membrane p-Tyr- , unknown phosphoty-rosine-containing protein R/E/M, member of the radixin/ezrin/moesin family VASP, vasodilator-stimulated phosphopro-tein. Diagram is modified from Simon et al.285...

Rosin is a non-reaclive prodnct and is retained on the anionic fibre by either attaching itself to a cationic source in the case of rosin soap, or anionic rosin emulsion or by having a cationic surface charge. The main requirement is that it requires a source of aluminium species to form the actual sizing agent, aluminium rosinate. Rosin is normally modified with maleic anhydride or fumaric acid to increase its reactivity with aluminium species and improve its efficiency at higher pH. The method by which this aluminium species is formed and retained in the wet-end of the paper/ board machine differs between anionic and cationic rosin sizes. 

Lehnert M, Gorbahn M Rosin C, Klein M Koper I, Al-Nawas B, et al. Adsorption and Conformation Behavior of Biotinylated Fibronectin on Streptavidin-Modified TiOX Surfaces Studied by SPR and AFM. Langmuir. 2011 27(12) 7743-51. 

It is common to add a few percent of an alkyd-surfactant blend to latex paints to improve adhesion to chalky surfaces and, in some cases, to improve adhesion to metals. It is important to use alkyds that are as resistant as possible to hydrolysis. Hybrid alkyd-acrylic latices have been prepared by dissolving an oxidizing alkyd in the monomers used in emulsion polymerization, yielding a latex with an alkyd grafted on the acrylic polymer (28,29). Nonyellowing waterborne alkyds based on rosin-fatty acid modified acrylic latices have been reported (30). 

Rosin modified Faster surface drying, adhesion, wetting, gloss... 

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