The Benefits And Tips For Successfully Using Resin

Epoxies have excellent flexural strength, offer a long working time, with a full cure requiring five to seven days. The viscosity is usually higher than other resins, they are more adhesive, cleaner looking, and more transparent. Epoxies are known for excellence in garage floor coverings, adhesion, resistance to heat and chemicals, electrical insulating properties, and mechanical properties.

The advantages include casting or laminating load-bearing forms subjected to stress, enhanced chemical and moisture resistance for exterior sculptures, and mixing resin paints. Resin is an excellent adhesive, is good for filling gaps, and bonds with metal, wood and many plastics. Since epoxy does not attack polystyrene, it is a good choice for coating Styrofoam or polystyrene forms. Most epoxy resins do not require special pre-warming, have a long shelf life, and high quality is achieved with an epoxy floor. Epoxy can be softened by heating in a well-ventilated room.

The United States Dr. S.O. Greenlee and Switzerland’s Dr. Pierre Castan share the credit for the first synthesis of an epoxy resin with a bisphenol-A-base. This occurred in 1936 with the Wiki Epoxy. The first proper patents for both polyester resin and glass fiber resin were independently recorded during the same year.

The general rule for most resins is if a powder pigment is used, ten percent of the weight can be added, and up to five percent for other liquid colorants. Water base colorants are not feasible even for an epoxy floor but the spirit or oil-based work fine. Specialty based colorants are generally pre-mixed with a little resin anyway. The standard powders dissolve well, without frothing, the pigment sinking, or graininess.

The elimination of air bubbles while mixing can generally be achieved by thinning the resin. This will also allow for a better impregnation of the surface by the resin when it is used for a coating, or enable the resin a better flow for a complicated form. There are numerous ways to accomplish this although most individuals have a personal preference. Heating the resin is one method, and since epoxy will change viscosity when warmed it will become thinner.

The method recommended is heating up two parts separately or placing the cups in water in an upright position. The resin can then be mixed. It is important to remember when the resin is heated, the cure will be accelerated, and the working time will be reduced. When the resin is initially dosed using two cups, they should be decanted into another cup once warmed.

This will ensure the ratio is maintained when they are mixed together. When an amassed volume is going to be poured, heating the resin is not a good idea. This will increase the risk of overheating the resin with the exotherm it contains.

Heating resin requires care, and safety must be observed. Another method is to add no more than ten percent of acetone by volume. Fifteen to twenty percent of U.S. denatured alcohol or methylated spirits can also be used. The strength of the cured resin will be affected if a solvent is added, but this will not present an issue for the small castings.

 

 

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