Insolubilizers coating

FIGURE 54.7. Structures of some chiral crown-ethers used as CS. While 10 (a) is used physically insolubilized (coated) onto the chromatographic matrix, similar compounds (b) are covalently bonded to it. 

Poly(vinyl cinnamate) Resists. Dichromated resists exhibit numerous shortcomings which include lot-to-lot variabiUty of the components, aging of the formulated resists in solution and in coated form, poor process stabiUty (due to a sensitivity to variations in temperature and humidity), and intrinsically low photosensitivity requiring long exposure times for adequate insolubilization. 

Pesticide crystals can be coated by the process of coacervation [1]. Water-soluble polymers are used to suspend the crystals. The suspension is then manipulated to cause the polymers to insolubilize and harden to encapsulating shellwalls. While effective, these processes do not produce sub-micron particles. Usually matrix peirticles from thirty microns to fifty microns maximum dimension are obtained. Each matrix particle contains many of the primary particles. Full biological efficacy in foliar applications would be lost. 

BERSET 2425 is a melamine based coating insolubilizer. It is a very effective crosslinker for starch, protein, P.V.A., and latex binders in pigmented, or non-pigmented coatings. BERSET 2425 is sufficiently reactive so that 80-90% of insolubilization is achieved directly off the machine and completely developed within a day. Unlike other crosslinkers, BERSET 2425 has little or no effect on coating viscosities. BERSET 2425 has an advantage of having a very low free formaldehyde. 

Attempts to overcome the disadvantages of glass have been made by the recent introduction of a range of carbohydrate-coated porous glass supports [43]. The carbohydrate is chemically bound to the glass and can be further derivatized to facilitate the insolubilization of ligands and proteins. 

The reaction of starch phosphate with such proteins as soybean protein and casein was used to produce protective colloids for insolubilization of pigments in coatings and paper.1684 The complexation of starch phosphate with protein insolubilizes the latter, particularly when starch phosphate is in the form of an ammonium salt.1685... 

Resinset Insolubilizers. [Harborchem] Paper coating insolubilizer used in polyvinyl alcohol formulations as... 

Soy protein products have been treated with formaldehyde and a variety of other aldehydes and ketones, both simple and complex (21, 23, 24). These efforts were directed toward production of insolubilized protein for adhesives, films, coatings, polymers, etc. 

A silicon wafer that has one surface oxidized to a controlled depth is coated (on the oxide surface) with a photoresist, such as poly(vinyl cinnamate), to produce a thin and uniform coating several micrometers thick when dry. Exposure to UV light through a mask insolubilizes part of the polymer. The uncross-linked polymer is washed off solvents. The bare substrate parts that thus reappear are etched through the oxide layer down to the silicon layer by a fluoride solution in water or by a plasma that contains reactive ions. 

Uses Binder insolubilizer tor paper and board coatings, nonwoven tab-rics deposit controi agent in wet-end paper processes str. additive tor alkaiine-sized paper component of waterborne inks, overprint varnishes, adhesives textiie, ieather, and paper water-repeiient formuiations antimicrobial treatment for textiles and timber coaguiant in mfg. of syn. leather cloth metal pretreatment coatings precursor to zirconia in cata-lyst systsms... 

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