Made from bones, hoofs, hides and horns of animals. The glue is sold as powder and needs to be mixed with water and heated before it can be used. It is used in the furniture industry.
Casein is a protien extracted from milk. The glue often is found in the powder form and needs to be mixed with water to work. Casein glue was used to bond the seams of cigarettes. It was very efficient, in fact one gram of the glue could finish 2000 cigarettes!
Elastomer is basically rubber. There are many varieties of rubber adhesives including natural rubber, Nitrile rubber and Silicone. These are used in the shoe industry, making aircraft, pressure sensitive adhesives, and in plastic tiling and flooring,
This group inlcudes Amino resins, Polyurethanes, Epoxies, Acrylics and Polyesters. They all help in bookbinding, packaging, furniture industry, electronics industry, flooring and in sand paper.
Starch is a carbohydrate found in plants. Adhesives made from it are used in stamps, can labels, book binding, and help make corrugated boxes and paper bags.