By Licari, J.J.; Hughes, L.A.
This thoroughly revised variation continues to be the one complete treatise on polymer coatings for electronics. because the unique variation, the functions of coatings for the environmental security of digital structures have significantly elevated, principally pushed by way of the aggressive have to decrease expenditures, weight and quantity. The calls for for high-speed circuits for the fast processing of indications and knowledge, high-density circuits for the garage and retrieval of megabits of reminiscence, and the enhanced reliability required of electronics for steering and controlling guns and house automobiles have prompted the improvement of many new and better coating polymers and formulations. either the theoretical facets of coatings (molecular constitution of polymer forms and their correlation with electric and actual houses) and utilized facets (functions, deposition techniques, purposes, trying out) are coated within the publication. Over a hundred proprietary coating formulations have been reviewed, their homes collated, and tables of comparative houses ready. This ebook comes in handy as either a primer and as a guide for amassing houses information.
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Extra info for Handbook of Polymer Coatings for Electronics - Chemistry, Technology and Applications
Example text
0 > Table 1-11 : Abrasion Resistance of Polyurethane Coatings (rng/1,000 cycles)" Isocyanate curing agent Mondur TD-80 Modified alkyd (uralkyd) . . Polyether prepolymer, moisture-cured . . . . . Multron R-12 . . . . . . E-244 E-262 E-268 Mondur CB-60 35 38 72 31 ... 29 33 ... EPOXIES Epoxies comprise another important class of polymers widely used for protective and electrical-grade coatings. Initial experimental work was done in the early 1930s, but production for commercial applications did not start until 1950.
Sward hardness value . . . . . . . . . 8 Impact . . . . . . . . . . . . . . . >I60 Elongation, % . . . . . . . . . . . . 14 Drying time, hr Set to t o u c h . . . . . . . . . . . . 4 Tack-free . . . . . . . . . . , . 0 Hard dried . . . . . . . . . . . . 0 > Table 1-11 : Abrasion Resistance of Polyurethane Coatings (rng/1,000 cycles)" Isocyanate curing agent Mondur TD-80 Modified alkyd (uralkyd) . . Polyether prepolymer, moisture-cured .
Today there are numerous producers. Since 1950 new uses for epoxies have developed at a very rapid pace, and production has increased each year. The Chemistry of Epoxies The chemistry of epoxies is based primarily on the high reactivity of the strained three-membered epoxy (also called oxirane) ring. With acidic or alkaline compounds or compounds containing active hydrogen atoms, the epoxy ring opens up and a polymerization reaction takes place, resulting in useful epoxy coatings, adhesives, encapsulants, and laminates.