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1. 发明授权

US4177205A Process for the preparation of highly stable liquid carbodiimide-containing polyisocyanate compositions 失效
标题翻译：用于制备高度稳定的含有液体碳二亚胺的多异氰酸酯组合物的方法
公开(公告)号：US4177205A
公开(公告)日：1979-12-04
申请号：US962232
申请日：1978-11-20
申请人： Robert L. Schaaf , Peter T. Kan , Moses Cenker
发明人： Robert L. Schaaf , Peter T. Kan , Moses Cenker
IPC分类号： C08G18/10 , C08G18/79 , C07C119/055
CPC分类号： C08G18/797 , C07C263/18 , C08G18/10 , C08G18/3206 , C08G18/4841 , C08G18/6674 , C08G2101/0066 , Y10S521/901
摘要： Highly stable liquid 4,4'-diphenylmethane diisocyanate (MDI) containing MDI-carbodiimide adducts are prepared by (a) heating MDI at a temperature of from 60.degree. C. to 120.degree. C. for a period of from one hour to ten hours in the presence of tris(chloromethyl)phosphine oxide, (b) stopping the carbodiimide formation by adding thereto a quenchant selected from the group consisting of magnesium chloride hydrate, stannous chloride and trichlorosilane, (c) heating the reaction mixture at a temperature between 60.degree. C. and 120.degree. C. for a period of from 0.5 hour to 6.0 hours, and (d) cooling to room temperature. The resulting compositions are highly stable and may be advantageously employed in the preparation of polyurethane compositions.
摘要翻译：含有MDI-碳二亚胺加合物的高稳定液体4,4'-二苯基甲烷二异氰酸酯（MDI）通过（a）在温度为60℃至120℃下加热MDI至少1小时至10小时在三（氯甲基）氧化膦存在下，（b）通过向其中加入选自氯化镁水合物，氯化亚锡和三氯硅烷的淬灭剂来停止碳二亚胺形成，（c）在60℃的温度下加热反应混合物 ℃和120℃，时间为0.5小时至6.0小时，和（d）冷却至室温。所得组合物是高度稳定的，并且可有利地用于制备聚氨酯组合物。

2. 发明授权

US5202640A Capacitance and leakage test method and apparatus 失效
标题翻译：电容和漏电试验方法及装置
公开(公告)号：US5202640A
公开(公告)日：1993-04-13
申请号：US709476
申请日：1991-06-03
申请人： Robert L. Schaaf , Floyd W. Olsen , Edward J. Tasillo
发明人： Robert L. Schaaf , Floyd W. Olsen , Edward J. Tasillo
IPC分类号： G01R31/02 , G01R27/26 , G01R31/28
CPC分类号： G01R27/2688 , G01R31/2805
摘要： Capacitance is measured using a system including a high voltage ramp monitor. A signal net is connected to ground by probes while a constant charging current is applied to the internal planes. A pure capacitive net will have a linear voltage rise proportional to capacitance, therefore its capacitance can be represented by ramp time. Leakage shorts will be detected by residual charge current measurements. The stimulus voltage is maintained for a fixed time after ramping to provide net to internal plane stress testing. Measured net capacitance is compared to nominal net capacitance for short/open detection.
摘要翻译：使用包括高压斜坡监视器的系统来测量电容。信号网通过探头连接到地，而恒定的充电电流施加到内部平面。纯电容网将具有与电容成比例的线性电压上升，因此其电容可以由斜坡时间表示。漏电短路将通过剩余充电电流测量来检测。刺激电压在斜坡后保持固定时间，以提供净到内部平面应力测试。测量的净电容与短路/开路检测的标称净电容进行比较。

3. 发明授权

US4465638A Process for using sediments developed during storage of pure MDI 失效
标题翻译：在纯MDI储存过程中开发沉淀物的工艺
公开(公告)号：US4465638A
公开(公告)日：1984-08-14
申请号：US459463
申请日：1983-01-20
申请人： Peter T. Kan , Robert L. Schaaf , Lewis N. Medaugh , William E. Volz
发明人： Peter T. Kan , Robert L. Schaaf , Lewis N. Medaugh , William E. Volz
IPC分类号： C07C265/12 , C07D229/00 , C08G18/76 , C07C119/048
CPC分类号： C07C265/12 , C07D229/00 , C08G18/7671
摘要： This invention relates to a process for utilizing the sediments in pure MDI which comprises(a) heating the sediments at temperatures of 180.degree. C. to 250.degree. C. for 0.25 hour to 6 hours in the presence of crude MDI; and(b) cooling the product to a temperature of 60.degree. C. or less within 5 minutes.The sediment-free crude MDI which results can then be used for the preparation of polyurethane products.
摘要翻译：本发明涉及一种在纯MDI中利用沉淀物的方法，其包括（a）在粗MDI存在下，在180℃至250℃的温度下加热沉淀物0.25小时至6小时; 和（b）在5分钟内将产品冷却至60℃或更低的温度。得到的无沉淀的粗MDI可用于制备聚氨酯产品。

4. 发明授权

US4199524A Stable liquid carbodiimide-containing polyisocyanate compositions 失效
标题翻译：含稳定的含碳二亚胺的多异氰酸酯组合物
公开(公告)号：US4199524A
公开(公告)日：1980-04-22
申请号：US955956
申请日：1978-10-30
申请人： Robert L. Schaaf , Peter T. Kan , Moses Cenker
发明人： Robert L. Schaaf , Peter T. Kan , Moses Cenker
IPC分类号： C08G18/72 , C08G18/79 , C07C119/055
CPC分类号： C08G18/797 , C08G18/725
摘要： Highly stable liquid 4,4'-diphenylmethane diisocyanate (MDI) containing MDI-carbodiimide adducts are prepared by heating MDI at a temperature of from 180.degree. C. to 250.degree. C. for a period of from one hour to ten hours in the presence of tris(chloromethyl)phosphine oxide and thereafter equilibrating the adduct formation. Equilibration can occur by any of several methods, i.e., by cooling the composition to a temperature of from 60.degree. C. to 90.degree. C. within twenty minutes, maintaining the composition at this temperature for a period of from one hour to four hours and thereafter cooling the composition to room temperature or by cooling the composition to a temperature less than 100.degree. C. within twenty minutes, further cooling to room temperature, and maintaining the composition at room temperature for one week to two weeks. The resulting compositions have very low sediment contents and are particularly useful in the preparation of microcellular polyurethane foams.
摘要翻译：含有MDI-碳二亚胺加合物的高度稳定的液体4,4'-二苯基甲烷二异氰酸酯（MDI）通过在室温下从180℃至250℃加热MDI至少1小时至10小时来制备的三（氯甲基）氧化膦，然后平衡加合物形成。平衡可以通过几种方法中的任一种进行，即通过在二十分钟内将组合物冷却至60℃至90℃的温度，将组合物在该温度下保持1小时至4小时的时间，以及然后将组合物冷却至室温或通过在20分钟内将组合物冷却至低于100℃的温度，进一步冷却至室温，并将组合物在室温下保持1周至2周。所得组合物具有非常低的沉积物含量，并且在制备微孔聚氨酯泡沫体中特别有用。

5. 发明授权

US4198489A Polyurethane foams prepared from highly stable liquid carbodiimide-containing 4,4'-diphenylmethane diisocyanate 失效
标题翻译：由高度稳定的含有液体碳二亚胺的4,4'-二苯基甲烷二异氰酸酯制备的聚氨酯泡沫体
公开(公告)号：US4198489A
公开(公告)日：1980-04-15
申请号：US955780
申请日：1978-10-30
申请人： Robert L. Schaaf , Peter T. Kan , Moses Cenker
发明人： Robert L. Schaaf , Peter T. Kan , Moses Cenker
IPC分类号： C08G18/72 , C08G18/79 , C08G18/14
CPC分类号： C08G18/725 , C08G18/797 , Y10S521/901
摘要： Polyurethane foams are prepared employing as the polyisocyanate ingredient a highly stable liquid 4,4'-diphenylmethane diisocyanate (MDI) containing MDI-carbodiimide adducts prepared by heating MDI at a temperature of from 180.degree. C. to 250.degree. C. for a period of from one hour to ten hours in the presence of tris(chloromethyl)phosphine oxide and thereafter equilibrating the adduct formation. Equilibration can occur by any of several methods, i.e., by cooling the composition to a temperature of from 60.degree. C. to 90.degree. C. within twenty minutes, maintaining the composition at this temperature for a period of from one hour to four hours and thereafter cooling the composition to room temperature or by cooling the composition to a temperature less than 100.degree. C. within twenty minutes, further cooling to room temperature, and maintaining the composition at room temperature for one week to two weeks. The resulting foams exhibit enhanced physical properties, particularly tensile and tear strength and lower heat sag.
摘要翻译：制备聚氨酯泡沫体作为多异氰酸酯成分，使用高稳定性的液体4,4'-二苯基甲烷二异氰酸酯（MDI），其含有MDI-碳二亚胺加合物，其通过在180℃至250℃的温度下加热MDI制备一段时间在三（氯甲基）氧化膦存在下从1小时至10小时，然后平衡加合物形成。平衡可以通过几种方法中的任一种进行，即通过在二十分钟内将组合物冷却至60℃至90℃的温度，将组合物在该温度下保持1小时至4小时的时间，以及然后将组合物冷却至室温或通过在20分钟内将组合物冷却至低于100℃的温度，进一步冷却至室温，并将组合物在室温下保持1周至2周。所得到的泡沫体具有增强的物理性能，特别是拉伸和撕裂强度以及较低的热下垂。

6. 发明授权

US4177433A Reel motor preamplifier 失效
标题翻译：卷轴电机前置放大器
公开(公告)号：US4177433A
公开(公告)日：1979-12-04
申请号：US962278
申请日：1978-11-20
申请人： Robert J. Christopher , Robert L. Schaaf
发明人： Robert J. Christopher , Robert L. Schaaf
IPC分类号： H03F3/04 , H03F3/30 , H03F3/20 , H03F3/68
CPC分类号： H03F3/3066 , H03F3/3079 , H03F2200/366
摘要： A high voltage/high current circuitry includes a push-pull voltage amplification stage connected in tandem with a parallel connected push-pull current amplification stage. For the voltage amplification stage a pair of bipolar operational amplifiers are connected in parallel and operate in a push-pull manner. A pair of switching means are positioned at the output of each of the bipolar operational amplifiers while the outputs of the amplifiers are connected to the inputs through a current gain regulating means, an isolation means and a voltage divider means.
摘要翻译：高压/高电流电路包括与并联连接的推挽电流放大级串联连接的推挽电压放大级。对于电压放大级，一对双极运算放大器并联连接并以推挽方式工作。一对开关装置位于每个双极性运算放大器的输出端，而放大器的输出通过电流增益调节装置，隔离装置和分压装置连接到输入端。

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