Functional B material for foaming is the master material of catalyst. It is to improve the strength of foam body of foamed products. The product was compounded with catalyst, nucleating agent, foaming agent and functional additives. The foamed products are suitable for use at high temperature, non-shrinkage deformation of cell, aging resistance, and increase the tensile strength and elongation at break. They can be widely used in occasions requiring heat preservation, sound absorption and seismic resistance. Non-toxic and tasteless materials can be used in food packaging. It can also be used for sound absorption, heat insulation and heat preservation in places with severe environmental conditions (such as oil, acid, alkali, temperature, humidity).