Acrylated urethane

Urethane acrylates Urethane adhesives Urethane alkyds Urethane-based resins... 

Zinc Borate (2Zn0-3B203-3.5H20) is a unique multifuntional fire retardant. It can function as a flame retardant, smoke suppressant, afterglow suppressant, as well as an anti-tracking agent in polymers. It has been used extnesively as a fire retardant in PVC, polyolefin, nylon, polyester, epoxy, acrylic, urethane, rubbers, etc. 

Figure 5.2 Micrographs of metal-coated lipid tubules. Top panel shows scanning electron micrograph of copper-plated microtubules (bar = 2.0 (Jim), while bottom panel shows optical micrograph of iron-coated microtubules embedded in acrylic-urethane clear coating (bar = 25 p,m). Reprinted from Ref. 135 with permission of Wiley-VCH.

Figure 3. Infrared spectra of acrylic-urethane coating. Spectrum A denotes cured coating B denotes coating exposed to condensing humidity C denotes coating exposed in QUV weathering chamber and D denotes coating exposed in a dry QUV. (Reproduced from ref. 14. Copyright 1986 American Chemical Society.)...

Figure 4. Carbon-13 cross-polarization, magic-angle spinning NMR spectra from an acrylic-melamine (A) and acrylic-urethane (B) coating. (Reproduced with permission from ref. 28. Copyright 1986 Elsevier Sequoia.)...

Figure 7. Elastically effective cross-link density versus bake temperature for an acrylic-urethane coating as a function of polyol to isocyanate ratio.

Urethane acrylates Urethane acrylates are formed by the reaction of isocyanates with hydroxy-functional acrylate monomers. After UV cure, they produce tough, flexible materials, which exhibit a good abrasion resistance. 

Liquid photo-sensitive acrylated urethane oligomer... 

Many epoxy dispersions are compatible with most types of latex emulsions including acrylic, urethane, styrene butadiene, vinyl chloride, and polyvinyl acetate. The epoxy dispersion can be used as a modifier for these emulsions to alter handling and application characteristics such as emulsion rheology, foaming tendencies, pH sensitivity, wetting properties, and coating coalescence. They can also be reacted into the latex resin either by reacting the epoxy with a functionalized latex or by use of an epoxy with a coreactant. In this way adhesive systems can be formulated that are cured at room or elevated temperatures. 

One recent trend has been away from using a photochromic dye itself merely as an individual component of a solution, polymer film or bulk polymer matrix. Instead, the photochromic is chemically linked to a polymer, which may be a natural polymer such as a cellulose derivative, an enzyme, a protein, or synthetic polymers from acrylates, urethanes, and vinyl compounds. The properties of the polymer can then be modified by external irradiation, and conversely, the properties of the photochromic are modified by the polymer. A recent biochemical example is the photocontrolled binding of monosaccharides to concanavalin A (Con A) modified with spiropyran units.208... 

There are three main types of ohgomers, epoxy acrylate, urethane acrylate and polyester acrylate. The basic trends in properties are demonstrated in Table 2. 

Epoxy Acrylate Urethane Acrylate Polyester Acrylate... 

Figure 14 Changes in the glossiness and color difference of etherified Sugi surfaces during UV irradiation. O, Cyanoethylated wood A, allylated wood , benzylated wood , untreated wood A, acrylic urethane resin-coated wood , acrylic silicon resin-coated wood. Note UV lamps were high-pressure mercury lamps with 80 W/ cm. Coatings were transparent. (From Ref. 30.)...

Fig. 11.2 Infrared spectra of three styrene acrylic urethane paints (/, II, III). S styrene, A acrylic resin, U urethane resin, T titanium white...

Zigba-Palus, J., Zadora, G., Milczarek, J. Differentiation and evaluation of evidence value of styrene acrylic urethane topcoat car paints analysed by pyrolysis gas chromatography. J. Chromatogr. A 1179, 47-58 (2008)... 

However, the use of PU finishes on automotive metal on assembly lines will not come about unless or until the toxicity problem is overcome. Urethane coating producers are active in the development of new PU systems—some involving proprietary blocking agents—to tackle this problem. Their efforts should show some success by 1985. Positive influences here include the growing use of base coat/clear coat systems clear PU topcoats are under active consideration. In addition, vapor permeation curing (VPC) is under investigation. Here, acrylic/urethane topcoats are cured rapidly under ambient conditions in an amine catalyst atmosphere. 

Hltox . [Hitox] Titanium dioxide buff colored pigment used in alkyds, acrylic urethanes, high solids systems, water redudbles, water bases, powd. coatings, inks, and adhesives. 

VIC . [Ashland] Pcdyester and acrylic urethane resins fw gas curing finishes for plastics, metal, heat-sensitive substrates. 

Johnson, B., FTIR studies on weathered Polyester, Acrylic Urethane Blends, Courtaulds Coatings Tech. Report, (1993) (a). 

Another reference Cll) describes acrylic/urethane systems - with optional epoxy content (for improved heat resistance). Typical compositions from the patent follow ... 

ACRYLATED EPOXY ACRYLATED URETHANE ACRYLATED POLYETHER ACRYLATED POLYESTERS... 

The structure of a typical acrylated urethane oligomer is shown below ... 

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