Polymeric foams having nanocellular morphology are formed from a polymeric material having structural units derived from 2-hydrocarbyl-3,3- bis(hydroxyphenyl)phthalimidine compound. The foams include a plurality of cells having an average diameter of less than 1 micron. Processes for forming the foams include melting a polymeric material having structural units derived from 2-hydrocarbyl-3,3-bis(hydroxyphenyl)phthalimidine compounds; diffusing a blowing agent into the polymeric material to form a mixture; nucleating bubbles in the mixture at a sufficient temperature and pressure to enable the production of cells having an average diameter of less than 1 micron; stabilizing the cells; and forming the mixture into a desired shape.

Title
Polymeric foams with nanocellular morphology and methods for making them
Application Number
201210240679
Publication Number
102775752A
Application Date
June 24, 2008
Publication Date
November 14, 2012
Inventor
Vaidyalingam Anand
Rajendran Santhosh Kumar
Sriraman Ravi
Chatterjee Gautam
Thiagarajan Chinniah
Agent
bian xinqin
Assignee
Sabic Innovative Plastics IP
IPC
C08J9/12
C08J9/04
C08L67/00
C08L71/00
C08L69/00