公开(公告)号：US4843143A

公开(公告)日：1989-06-27

申请号：US182668

申请日：1988-04-18

申请人： Billy M. Culberton ,  Omar Tiba

发明人： Billy M. Culberton ,  Omar Tiba

IPC分类号： C08G69/40

CPC分类号： C08G69/40

摘要： An improved process for increasing the rate of the copolymerization of mixtures of polyphenolic compounds having more than two phenolic hydroxyl groups per molecule and bis-oxazolines comprising carrying out the copolymerization in the presence of a catalytic amount of a halohydrocarbon at a temperature in the range of from about 130.degree. C. to 150.degree. C. is described.

摘要翻译： 一种改进的方法，用于提高每分子具有多于两个酚羟基的多酚化合物的混合物的共聚速率和双恶唑啉，包括在催化量的卤代烃存在下在一定温度范围内进行共聚反应 描述了约130℃至150℃。

公开(公告)号：US20080235929A1

公开(公告)日：2008-10-02

申请号：US10598379

申请日：2005-03-24

申请人： Craig B. Stolarczyk ,  Robert M. Loomis ,  Paul D. Rogers ,  Omar Tiba

发明人： Craig B. Stolarczyk ,  Robert M. Loomis ,  Paul D. Rogers ,  Omar Tiba

IPC分类号： B23P6/00

CPC分类号： E01B31/20 ,  Y10T29/49723

摘要： A method for restoring a damaged rail seat located on a concrete rail tie. The method comprises applying a polymeric material comprising a poly(urethaneurea) material to the damaged rail seat located in the concrete rail tie; and restoring the damaged rail seat by cursing the polymeric material under ambient temperature and pressure conditions. The polymeric material is substantially sag resistant and maintains its shape without substantial runoff from the concrete rail tie during the restoring of the damage rail seat.

摘要翻译： 一种用于恢复位于混凝土轨枕上的受损轨道座椅的方法。 该方法包括将包含聚（尿烷脲）材料的聚合物材料施加到位于混凝土轨枕中的损坏的轨道座椅上; 并通过在环境温度和压力条件下诅咒聚合材料来恢复损坏的轨道座椅。 聚合物材料在损坏轨道座椅的恢复期间基本上不起伏并且保持其形状而没有从混凝土轨道系带的实质径流。