申请人:Dow Global Technologies LLC
公开号:US10322534B2
公开(公告)日:2019-06-18
Prepare nanofoam by: (a) providing a mold (10) with a mold cavity (12) defined by mold walls defining a sealable port (32); (b) providing a foamable polymer mixture containing a polymer and a blowing agent at a pressure at least 690 kilopascals above the saturation pressure for the polymer and blowing agent; (c) introducing the foamable polymer mixture into the mold cavity (12) while maintaining a temperature and pressure at least 690 kilopascals above the saturation pressure and controlling the pressure in the mold cavity (12) by expanding a wall of the mold; and (d) releasing pressure around the foamable mixture by moving a mold wall (20) at a rate of at least 45 centimeters per second, causing the foamable polymer mixture to expand into nanofoam having a porosity of at least 60 percent, a volume of at least 100 cubic centimeters and at least two orthogonal dimensions of four centimeter or more.
通过以下方法制备纳米泡沫(a) 提供一个模具 (10),其模腔 (12) 由限定可密封端口 (32) 的模壁限定;(b) 在高于聚合物和发泡剂饱和压力至少 690 千帕斯卡的压力下,提供含有聚合物和发泡剂的可发泡聚合物混合物;(c) 将可发泡聚合物混合物引入模腔 (12),同时保持高于饱和压力至少 690 千帕斯卡的温度和压力,并通过扩大模壁来控制模腔 (12) 中的压力;(d) 以每秒至少 45 厘米的速度移动模壁 (20),释放可发泡混合物周围的压力,使可发泡聚合物混合物膨胀成纳米泡沫,其孔隙率至少为 60%,体积至少为 100 立方厘米,至少有两个正交尺寸为 4 厘米或更大。