The depletion of oil and the urgency to protect the environment have promoted the continuous exploration of sustainable alternatives to petroleum-based industrial chemicals. Sustainable chemicals are mainly derived from natural plant and agricultural waste. Because of their biodegradability and low toxicity during preparation
use
and posttreatment
these resources can synthesize environmentally friendly new processed materials. Among the polymers used daily
phenolic resins
epoxy resins
and polybenzoxazines have a wide range of applications in the electronics industry
construction
fireproofing materials
adhesives
and coatings. This paper reviews the researches of the preparation of the above resins by natural phenols in the agricultural and industrial wastes such as cardanol