Thermosetting acrylic

A number of thermosetting acrylic resins for use as surface coatings have appeared during recent years. These are generally complex copolymers and terpolymers such as a styrene-ethyl acrylate-alkoxy methyl acrylamide... 

Good quality steel is used and electrozinc is preferred for washing machines. Steel is pretreated with iron phosphate for economy electrozinc with a fine crystal zinc phosphate. No primer is normally used 25-40/im of finish is applied direct to metal. The required properties are best obtained with a thermosetting acrylic or polyester/melamine-formaldehyde finish. Self-reactive acrylics are usually preferred these resins contain about 15 Vo 7V-butoxymethyl acrylamide (CH2=CH —CO —NH —CHj—O —C4H,) monomer and cure in a manner similar to butylated melamine-formaldehyde resins. Resistance or anti-corrosive properties may be upgraded by the inclusion of small amounts of epoxy resin. Application is usually by electrostatic spray application from disc or bell. Shapes are complex enough to require convected hot-air curing. Schedules of 20 min at 150-175°C are... 

Thermoset Plastics Alkyd, amino resin, thermosetting acrylic resin, casein, epoxy, phenolic, polyester, polyamide, silicone. 

Nupol Thermosetting acrylic resin Freeman Chemical... 

Epoxy adhesives represent a significant part of the overall structural adhesives market (about 1.8 bihion). The main competitors to epoxy adhesives are polyurethanes however, thermosetting acrylics and cyanoacrylate adhesives are also strong challengers in certain market segments. 

Primer 2000 (b) Thermosetting acrylic adhesives 5—10 pm Air drying in 3-5 min at room temperature Cleans and etches aluminum and stainless steel Provides improved durability to salt water... 

Adhesives commonly used on thermosetting materials include epoxies, urethanes, cyanoacrylates, thermosetting acrylics, and a variety of nonstructural adhesive systems. The following discussion includes a very brief description of various thermosetting substrate materials, the properties that are critical relative to epoxy adhesion, and any special processes that should be noted for the particular substrate. 

Alkyd parts are generally very rigid, and the surfaces are hard and stiff. Surface preparation for alkyd parts consists of simple solvent cleaning and mechanical abrasion. Epoxies, urethanes, cyanoacrylates, and thermosetting acrylics are commonly used as structural adhesives. 

The common surface preparation treatment for epoxy resins is to wipe with solvent, mechanical abrasion, and final solvent cleaning. Epoxy parts can be most easily bonded with an epoxy adhesive similar to the material being bonded. Urethanes, cyanoacrylates, and thermosetting acrylics have also been used when certain properties or processing parameters are required. 

When solvent welding or thermal welding is not practical or desired, adhesive systems can be used. Adhesive types such as epoxies, urethanes, thermosetting acrylics, nitrile phe-nolics, and cyanoacrylates permit ABS to be bonded to itself and to other substrates. The best adhesives have shown strength greater than that of ABS however, these adhesives provide very rigid bonds. 

Determination of MCT. The coating systan used consists of a thermosetting acrylic latex, Hycar 2600X256 (EFGoodrich Chenical Division) containing 15 wt.% of a partially methylated melamine formaldehyde, Cymel 373 (American Cyanamid Corporation). Adjustment of the pH level of the coating was achieved by the addition of p—toluene sulfonic acid. 

Structopendant Prepolymers. The reactive or functional groups are distributed along the prepolymer chain. Examples are the epoxies, unsaturated polyesters, and the thermoset acrylics. 

Figure 8. Schematic structure of silicone and thermoset acrylic prepolymers (4)...

The thermoset acrylics (20) of major importance in the coating industry, in recent years, have been developed primarily by Canadian Industry Ltd. and by Pittsburgh Plate Glass Co. in this country (4). Raw materials are acrylamide, acrylic acid, acrylates, and styrene. Cross-linking agents are amino and epoxy resins. The materials are also self-cross-linking. They are usually sold as solutions in paint solvents. 

Use Modifier for alkyd resins and thermosetting acrylic systems, reactive diluent for epoxy resins. 

CAS 999-61-1. CH2CHCOOCH2CH2OCH3. A functional monomer used in manufacture of thermosetting acrylic resins for surface coatings. 

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