Acrylic binders properties

Some car manufacturers use clearcoats with acrylic binders that are cured with aliphatic isocyanates. Their chemical and mechanical properties are better than those of alkyd-melamine clearcoats. Solid contents are as high as 58%. 

Chem. Descrip. Based on modified fatly raw materials Uses Antifoam, air release agent for architectural paints (exterior and interior) based on VAc and styrene acrylate binders, low to med. gloss dispersion paints, printing inks, dispersion adhesives, pigment preps. Regulatory BGA approved Properties Liq. 

Chem. Descrip. y-Glycidoxypropyltrimethoxysilane CAS 2530-83-8 EINECS/ELINCS 219-784-2 Uses Adhesion promoter in water-borne acrylic sealants, urethane and epoxy coatings coupling agent in polysulfide and polyurethane caulks and sealants, min.-filled or glass-reinforced thermosets and thermoplastics, and in glass roving size-binders Properties Colorless transparent liq. m.w. 236.4 dens. 1.065-1.075 vise. 

Regulatory EINECS, DSL, MITI, AlCS, ECL listed (act. ingred.) Properties Colorless to si. yel. clear liq. sol. 1 100 in n-butanol, MEK, butyl acetate, methoxypropyl acetate, xylene, min spirits good misc. with solv.-based acrylic binders dens. 1.12 0.02 g/cm vise. 160-400 mPa s flash pt. > 70 C 100% act. 

Uses Acrylic for water-based printing inks, in the mfg. of high gloss and other types of emulsion paint binder for nonwoven fabrics Features Aq. emulsion of alkali-sol. acrylic copolymer Properties Emulsion 0.2 p particle size sp.gr. 1.07 vise. 0.05-0.5 poise pH 3.5-5.5 anionic 41 1% solids Texicryl 13-031 [Scott Bader]... 

All of these UV-curable systems have very different chemistries than those used in solvent-based systems. Most contain a dispersant, a plasticizer (not necessary in all cases), a photopolymerizable binder, and an initiator to activate the UV curing. A typical binder/initiator system found in the literature is a polyester acrylate binder and an initiator such as 2-hydroxy-2methyl-l-phenyl-propan-l-one. The binder is a liquid low-viscosity monomer diluted into hydroxy-ethyl methacrylate. Most of the UV-curable systems contain an acrylate monomer of some sort, since they have relatively low viscosities (100 mPa s or cP) and excellent reactivity with the UV radiation. The low viscosity allows the preparation of ceramic slurries with a relatively high solids loading, and the resulting high-density green sheets have excellent mechanical properties. 

Acrylic binders interact with alumina to provide stability and rfieological properties required by ceramic slips. Interaction occurs through ionized sites on the binder. Binder adsorption takes several hours to reach equilibrium. During this time, slip viscosity increases. ... 

Due to the wide range of polarities exhibited by acrylics (dependent upon molecular weight and monomer composition), it is important to thorou ly check compatibility before deciding to use a particular resin. Solution vinyl resins impart adhesion and anticorrosive properties to the acrylic binder, but at the expense of application solids and film hardness . This is shown in Figure 3-1. 

Polymeric binders are often used to improve the films adhesive and mechanical properties. In some cases additional polystyrene sulfonic acid can be used to increase film properties, in most cases polyvinyl alcohol or waterborne polyesters and polyurethanes are more desirable. Special polymers like silicone emulsions have been used for antistatic releasing agent compositions. Pendant vinyl groups serve to form a network by addition of Si-H using platinum catalysis. Acrylic binders have been claimed to offer fast drying presumably due to their liigh glass temperature. 

Macromolecular Materials and Engineering 286, No.ll, 30thNov.2001, p.695-704 UV CURABILITY AND MECHANICAL PROPERTIES OF NOVEL BINDER SYSTEMS DERIVED FROM POLY(ETHYLENE TEREPHTHALATE)(PET) WASTE FOR SOLVENTLESS MAGNETIC TAPE MANUFACTURING. I. ACRYLATED OLIGOESTERS Farahat M S Nikles D E Alabama,University... 

Acrylic Polymerization Model. Acrylic polymers are known to have excellent weathering and functional properties as binders for coatings, and they are widely used in the coatings as well as many other industries. To obtain the desirable property/cost balance, random copolymers instead of blends of homopolymers are frequently used. 

Typical liquid systems require doses between 10 and 50 kGy. They consist of binders (prepolymers) with acrylic (H2C=CH-CO-0-) double bonds in the main chain (polymaleates and polyfumarates) and of monomers, usually acrylates used as reactive thinners. Other ingredients added to the formulation may be pigments, dyes, fillers, flatting agents, and additives to improve film and surface properties and attain the required performance criferia. ... 

Reactive prepolymers used as binders are produced by acrylation of oligomers, such as epoxy resins, urethanes, polyesters, silicones, oligo-buta-diene, melamine derivatives, cellulose, and starches. Prepolymers are the principal ingredients of coating formulations and largely determine the basic properties of the coating. Examples of industrially important acrylated prepolymers are in Table 5.9. 

These binders possess properties which are very important for ease of manufacture and for obtaining a uniform product. Thus they have low viscosity on casting without sedimentation of solids, have sufficient reactivity for complete low-temperature cure and evolve little heat on polymerization (e.g. much lower than heat of polymerization of methyl acrylate). 

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