发明名称 |
Fremgangsmåde til fremstilling af PET-skum og PET-skum opnået med denne fremgangsmåde |
摘要 |
A process for the production of PET foams includes the extrusion of a mixture of PET, epoxy resin, catalyst consisting of imidazole, derivatives of imidazole or mixtures thereof plus a blowing agent, wherein the homopolymerization reaction of the epoxy phase is performed in the extruder, upstream of the introduction of the blowing agent. Compared to the methods of the known art, a process according to the invention offers the advantage of providing a stable PET foam, in which the structure of the polymer chains is kept unaltered. The system therefore has viscoelasticity characteristics which allow the PET/epoxy homopolymer to receive the expanding action of the blowing agent, as far as the innermost and deepest layers of foam also even if they have a significant thickness. |
申请公布号 |
DK2809724(T3) |
申请公布日期 |
2016.04.18 |
申请号 |
DK20130703317T |
申请日期 |
2013.01.14 |
申请人 |
DIAB INTERNATIONAL AB |
发明人 |
LAURI, LEONE;BRESSAN, RAFFAELA;ALIPERTA, LUIGI;PETERSSON, EVA-LOTTA, MAGDALENA |
分类号 |
C08L67/02;B29C44/34;C08J9/00;C08J9/14 |
主分类号 |
C08L67/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|