CAS: 1000-82-4; (Hydroxymethyl)Urea

上下游产品

formaldehyd urea 1,3-bis(hydroxymethyl)urea methylenediurea methylenediurea bis-(4-hydroxyphenyl)methane 1,3-bis(4-hydroxybenzyl)urea formaldehyd

聚合甲醛,尿素 反应生成羟甲基脲
参考文献:典范的化学理论以尿素和三聚氰胺的羟甲基化为例
标题:典范的化学理论以尿素和三聚氰胺的羟甲基化为例
摘要:分析了尿素和三聚氰胺的羟甲基化平衡和动力学的最新数据.理论框架提供了一个连续的现象学近似的序列,据称是规范的.该理论在较早时进行了阐述,始于两个连续的方案,其基本原理可以追溯到鲍林(pauling)和弗洛里(flory)的早期工作.这里的两个阶段足以表明,来自八个实验室的所有数据,包括六元羟甲基尿素家族和十元羟甲基三聚氰胺家族,在数量上是一致的,这种情况未被该领域的其他工人所怀疑.因此,所涉及的统计热力学和动力学原理将比以前更详细地阐述.使用它们,取代基的影响很小(例如0.35 Kj Mol-1)具有很高的意义和准确性.很大程度上归功于tomita最近的测量,羟甲基三聚氰胺目前被认为是化学文献中热力学最佳表征的族.理论化学家面临的挑战是,针对该家族中取代基效应的测得的能量学来测试量子理论技术,并为其他家族开发基于分子加成的图论分析,该理论是已经被很好测试的近似方案的基础.
Doi:10.1039/f19848000359

专利信息

专利号:EP-0082618-B1
优先权日:1981-12-23
标题 :Method of preparing a polymeric coating composition
摘要:A method of preparing a storage-stable one-part reactive liquid thermal curing polymeric coating composition from an isocyanate-functional polymeric compound which has a substantial portion of its isocyanate groups masked with an isocvanate masking agent, and a crosslinking agent which is substantially insoluble in aprotic solvents. These liquid compositions are homogeneous even when free of solvents. Preferably the crosslinking agent is a crystalline polyol. The method involves the synthesis of a solubilizing oligomer which is formed by the partial reaction of the crosslinking agent and the unmasked isocyanate-functional polymeric compound. The thermal curing of these compositions results in polymeric coatings which possess superior physical properties. These cured coatings are particularly useful in the manufacture of retroreflective sheeting.

专利号:US-4530859-A
优先权日:1981-12-23
标 题:Method of preparing a polymeric coating composition from a blocked isocyanate-functional polymeric compound and a crosslinking agent which is insoluble in aprotic solvents
发明人：GRUNZINGER JR RAYMOND E
权利人:MINNESOTA MINING & MFG
摘要:A method of preparing a storage-stable one-part reactive liquid thermal curing polymeric coating composition from an isocyanate-functional polymeric compound which has a substantial portion of its isocyanate groups masked with an isocyanate masking agent, and a crosslinking agent which is substantially insoluble in aprotic solvents. These liquid compositions are homogeneous even when free of solvents. Preferably the crosslinking agent is a crystalline polyol. The method involves the synthesis of a solubilizing oligomer which is formed by the partial reaction of the crosslinking agent and the unmasked isocyanate-functional polymeric compound. The thermal curing of these compositions results in polymeric coatings which possess superior physical properties. These cured coatings are particularly useful in the manufacture of retroreflective sheeting.

专利号:CN-1028238-C
优先权日:1989-08-02
标 题:Synthesis of cationic quaternized sodium urealate polymer

专利号:US-5684026-A
优先权日:1994-11-22
标 题:Aminocyclopentane derivative
发明人：OGAWA SEIICHIRO; UCHIDA CHIKARA; KIMURA HIROSHI; INOKUCHI JIN-ICHI
权利人:SEIKAGAKU KOGYO CO LTD
摘要:The present invention provides aminocyclopentane derivatives which are saccharide analogs having extremely high alpha -glucosidase inhibitory effects and novel structures and expected to be usable or applicable to drugs or agricultural chemicals. An aminocyclopentane derivative represented by the formula (1), wherein R1 represents H while R2 represents CH2OH, or R1 represents CH2OH while R2 represents H and R3 represents a substituted or unsubstituted aryl group or an alkyl, alkenyl, alkynyl or hydroxyalkyl group having 1 to 10 carbon atoms, intermediates for the synthesis of the same, a process for producing the intermediates and a process for producing the aminocyclopentane derivative.

专利号:CN-112250661-A
优先权日:2020-11-18
标题 :A kind of method for catalyzing synthesis of lactide

专利号:CN-1041766-A
优先权日:1989-08-02
标 题:Synthesis of cationic quaternized sodium urealate polymer