Term: alkyd

The term "alkyd" refers to a type of synthetic resin used primarily in paints and coatings. Alkyds are made by chemically modifying natural oils (such as soybean or linseed oil) with polyols (like glycerol) and dibasic acids or anhydrides (such as phthalic anhydride). The result is a durable, oil-modified polyester resin.

In the painting and decorating industry, alkyd-based paints are known for:

• Excellent adhesion
• Good durability and hardness
• Smooth flow and leveling
• Gloss retention
• Resistance to wear and moisture

Alkyd paints are commonly used in oil-based enamels, primers, and industrial coatings. They are especially popular for woodwork, metal surfaces, and trim due to their tough finish and resistance to abrasion.

However, they typically have longer drying times and higher VOC (volatile organic compound) content compared to water-based alternatives like acrylics, which has led to a decline in their use in some residential applications due to environmental regulations.