Patent ID: 7915351
Filing Date: 2011-03-29
Classification: B29C,C08G,C08J,C08L

Abstract:
1. A process for producing a solution blend of a polybenzimidazole (PBI) and a polyetherketoneketone (PEKK) which comprises the steps of: providing a polybenzimidazole (PBI) and a polyetherketoneketone (PEKK); mixing said PBI with sulfuric acid at a temperature between 40° C. and 80° C. for 30 minutes to 2 hours to produce a PBI solution; cooling said PBI solution to room temperature to form a cooled PBI solution; adding said PEKK to said cooled PBI solution to form a mixture; stirring said mixture from 30 minutes to 2 hours at room temperature to form a stirred mixture; pouring said stirred mixture into an excess of water currently being stirred to form an aqueous mixture; filtering said aqueous mixture to remove the water and sulfuric acid to produce a blend; washing said blend with water; and drying said blend to yield a blend in all proportion within the range from 1/99 PBI/PEKK to 99/1 PBI/PEKK.