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. |