Usually in the process of sponge production, the foaming speed is too fast, and the pores of the sponge are too large and not delicate enough. In the production process, a reasonable and basic formula plays a key role. The situation discussed in this article is based on the premise that the process ......

The paint mold of the in-mold paint is formed into a film before the crosslinking of the A component of the hydroxyl-containing polyester polyol and the B component of the isocyanate, so that the paint film has more excellent surface strength and can effectively block foaming. yellowing of the mater......

The paint mold of the in-mold paint is formed into a film before the crosslinking of the A component of the hydroxyl-containing polyester polyol and the B component of the isocyanate, so that the paint film has more excellent surface strength and can effectively block foaming. yellowing of the mater......