Glossary

Chemical Abstracts Service number given to every chemical known to the world.

A substance used to change the rate of a chemical reaction without itself undergoing permanent change in composition.

A resilient material used for sealing moving joints. Also known as sealants.

1/100th of a poise (dyne-sec/cm²); a viscosity measurement unit.

Appearance of friable or whitish powder on the dried film on continuous exposure to UV

The ability of a coating to resist slight breaks in the film that do not penetrate into the previously applied coating or to the substrate.

The resistance of the dried film to localized damages caused by stones, grits or chips.

The formation of small areas of the wet film of a coating, leaving gaps in the film.

Degree of clearness.

Additives used to obtain/promote good film formation.

Clear over base coat. COB coatings are used in OEM and auto finishes. A clear coat is given over a pigmented coating to enhance gloss and scratch resistance.

The forces that bind together all particles coherently of a coating or sealant. Cohesion should not be confused with adhesion.

The curing of coating at room temperature without the aid of heat.

The ability of a material to become or remain homogenous before, during or after cure. NOTE: Serious incompatibility is exemplified by separation of components, loss of clarity, “sweating out,” loss of adhesion, etc.

The maximum stress a material can sustain under crush loading. It is calculated by dividing the maximum load by the original cross-sectional area of a specimen.

A floor designed to carry off built-up static electricity and reduce the risk of explosion in potentially explosive environments.

Joints in concrete which are grooved, formed or sawed into slabs so cracking will occur in these joints rather than in a random manner. They extend to 1/4 the depth of the concrete thickness. When the concrete is completely cured and dry, they may be filled with a cementitious or polymeric materials.

A process by which the metal is wearing away by chemical or electrochemical influences.

Compounds used to prevent the oxidation of metal.

A cove is used to form a junction between the wall course and the floor.

The critical pigment volume concentration level at which the binder quantity is just sufficient to form a non-porous film.

The ability of the coating to expand enough to cover up the cracks occurred on the substrate beneath.

The splitting of the dried film on ageing, due to insufficient elongation properties.

Small, shallow, crater-like surface imperfections.

The dimensional change or deformation that occurs over a period of time when a material is subjected to constant stress at a constant temperature; also called cold flow.

A test conducted to determine the adhesion of the coating with the substrate using cross-cut adhesion tester.

Tying together large molecules and changing the physical properties of the material.

The changing of physical properties of a material by chemical reaction—usually to a harder or more permanent form. Sometimes cure is synonymous with set.

The schedule of time periods under specified conditions to which a reacting composition is subjected in order to reach a specified property level.

The temperature to which a system is subjected in order to cure it. Note that the temperature attained by the system in the process of curing may differ from the temperature of the atmosphere surrounding the system.

The period of time during which a system may be subjected to heat or pressure to cure. In two-component systems, it is the time lapse between the addition of the curing agent (hardener) to the resin, and completed polymerization.

A catalytic or reactive agent used to promote, enhance or control the curing reaction and aid in property development. The addition of a curing agent to an epoxy resin causes polymerization.