THE ห้องเย็น DIARIES

The main patent for versatile polyurethane foam preparation was obtained by Zaunbrecher and Barth in 1942. The versatile polyurethane foam was produced via simultaneous polyurethane synthesis and gas generation by combining organic and natural toluene diisocyanate (TDI), aliphatic polyester, water, and catalyst. In this 1-step process, polyurethane