| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a foamed polymer composition, preferably a self-adhesive, with no hollow space that is not formed by microballoon. <P>SOLUTION: This invention relates to a process for preparing a foamed polymer composition using expandable hollow microbeads, wherein: in a first process line, first starting materials, to which at least the predominant portion of one polymer or a plurality of polymers to be used belongs, are mixed and degassed to give a premix, thereafter this premix is subjected to a pressure such that the pairing of this pressure with the temperature of the premix is below the pressure and temperature pairing that is critical for triggering the expansion of the hollow microbeads to be used; and in a second process line, second starting materials, to which the hollow microbeads to be used belongs, are degassed, thereafter the second starting materials treated in the second process line are added to the premix prepared in the first process line, and thereafter the second starting materials are mixed with the premix. <P>COPYRIGHT: (C)2012,JPO&INPIT |
