US 7,321,020 B2
Polycondensation products and a process for their preparation
Josef Suren, Bad Wunnenberg-Haaren (Germany)
Assigned to Bakelite AG, Duisburg (Germany)
Filed on Jul. 10, 2003, as Appl. No. 10/617,104.
Claims priority of application No. 102 31 851 (DE), filed on Jul. 12, 2002.
Prior Publication US 2005/0020860 A1, Jan. 27, 2005
Int. Cl. C08G 14/02 (2006.01); C08G 14/12 (2006.01); C08G 8/28 (2006.01)
U.S. Cl. 528—129  [528/137; 528/144; 528/486; 528/495] 7 Claims
 
1. In the production of refractory articles, the improvement comprises incorporating a polycondensation product produced by reacting a bisphenol residue from the production of bisphenols with an aldehyde in an acidic medium and at least one phenolic compound into the refractory material and forming the refractory article.