Alkenylaromatisk, termoplastisk, syntetisk harpiks i form av et langstrakt skumlegeme

申请公布号：NO178700(C)

申请号：NO19900004842

申请日期：1990.11.07

申请公布日期：1996.05.15

申请人：

DOW CHEMICAL CO, THE

发明人：SUH, KYUNG WON

分类号：C08J9/12;C08J9/04;C08J9/14;(IPC1-7):C08J9/14

主分类号：C08J9/12

摘要：<p>Alkenyl aromatic thermoplastic synthetic resinous elongate foam bodies having a machine direction, a traverse direction and closed noninterconnecting gas-containing cells are prepared using at least 70 percent by weight of 1,1,1-trifluoroethane and or 1,1,1,2-tetrafluoroethane as a blowing agent or part of a blowing agent mixture. These foam bodies have an average cell size of 0.01 to 0.3 millimeters, a density of from 0.75 to 6.0 pounds per cubic foot, an absolute dimensional stability of less than 4 percent in any direction when measured by the test designated ASTM D2126/C578, and preferably a minimum cross-sectional dimension of at least 0.25 inch, a cross-sectional area of at least 8 square inches, a water vapor permeability not greater than 1.8 perm inches. A cell size enlarger agent may be necessary for cell sizes in the 0.2-0.3 range.</p>

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