STANDARD METHODS OF TESTING URETHANE FOAM POLYOL RAW MATERIALS
|Publication Date:||19 December 1969|
These methods cover the testing of polyol raw materials used in preparing urethane foams, including both polyesters and polyethers containing carboxyl, primary or secondary hydroxyl groups, or both.
NOTE 1-Urethane foams are cellular products that vary from soft resilient types to those which are hard and rigid. These foams are made by the interaction of polyhydroxy compounds, water, and an organic polyisocyanate. The reactions involved in the manufacture of these foams can be modified in many ways. Basic materials, especially tertiary amines, act as catalysts and accelerate the reaction, whereas acidic materials retard it. The uniformity and size of the cells are affected by the addition of surface-active agents. Usually nonionic or cationic surfactants are employed. Fillers, plasticizers, and colors are also added in many cases to give specific properties to the foam.
The values stated in SI units are to be regarded as the standard.