甘油二缩水甘油醚(GDE)是一种方便且廉价的双环氧化物交联剂,制备两种酶类的交联酶聚集体(CLEA)证明了这一点。从脂肪酶的GDE CLEAs荧光假单胞菌(AK),从脂肪酶洋葱伯克霍尔德菌(PS),和脂肪酶B,从南极假丝酵母(CAL B),以及从苯丙氨酸氨裂解酶(PAL)的欧芹显示出改善的性能,与比较他们的戊二醛(GA)交联的对应物。超声研究表明,脂肪酶PS和PAL的GDE CLEA在机械上比GA CLEA更稳定。在rac的动力学解析中-1-苯乙醇,GDE-脂肪酶CLEAs的催化活性(分别在22°C下制备的AK,CaL B和PS的U = 69.6、134.8和127.4 U g -1)超过了相应的GA-脂肪酶CLEAs(分别在22°C下制备的AK,CaL B和PS的U = 24.4、131.0和119.2 U g -1)。如果将PAL和牛血清白蛋白(BSA)的GDE co-CLEA用于将6
Glycerol-, pentaerythritol- and trimethylolpropane-based polyurethanes and their cellulose carbonate composites prepared via the non-isocyanate route with catalytic carbon dioxide fixation
作者:Maria Fleischer、Hannes Blattmann、Rolf Mülhaupt
DOI:10.1039/c3gc00078h
日期:——
trimethylolpropane and pentaerythritol glycidyl ether, followed by curing with citric acid amino amides in the presence of cellulose carbonate, represents an attractive green chemistry route to non-isocyanate polyurethanes (NIPU) and bio-based NIPU composites. In comparison to traditional polyurethanes, neither fossil resources nor toxic isocyanates are required. The glycidyl ethers react with carbon dioxide
The invention relates to novel photoinitiators of formula (I) wherein each of the substituents is given the definition as set forth in the Specification and the claims. The photoinitiators can be used to prepare multifunctional photoinitiators.
PROCESSES FOR PRODUCING BETA-LACTONE AND BETA-LACTONE DERIVATIVES WITH HETEROGENOUS CATALYSTS
申请人:Novomer, Inc.
公开号:US20190047972A1
公开(公告)日:2019-02-14
The present invention is directed to processes from producing beta-lactone and beta-lactone derivatives using heterogenous catalysts. In preferred embodiments of the present invention, the processes comprise the steps: passing a feed stream comprising an epoxide reagent and a carbon monoxide reagent to a reaction zone; contacting the epoxide reagent and the carbon monoxide reagent with a heterogenous catalyst to produce a beta-lactone product in the reaction zone; and removing the beta-lactone product from the reaction zone. In preferred embodiments, the heterogenous catalyst comprises a solid support containing a cationic Lewis acid functional group and a metal carbonyl compound comprising at least one of anionic metal carbonyl compound or a neutral metal carbonyl compound. In certain preferred embodiments, the epoxide reagent and carbon monoxide reagent have a biobased content.
FLUORINE-CONTAINING ETHER COMPOUND, LUBRICANT FOR MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING MEDIUM
申请人:SHOWA DENKO K.K.
公开号:US20180009773A1
公开(公告)日:2018-01-11
This fluorine-containing ether compound is represented by Formula (1).
R
1
—R
2
—CH
2
—R
3
—CH
2
—R
4
—R
5
(1)
(in Formula (1), R
1
is an aryl group or an aralkyl group, R
2
is a divalent linking group having 0 or 1 polar group, R
3
is a perfluoropolyether chain, R
4
is a divalent linking group having 2 or 3 polar groups, and R
5
is an aryl group or an aralkyl group.)
Water-absorbing material and absorbent article employing the same
申请人:——
公开号:US20030045198A1
公开(公告)日:2003-03-06
The water absorbent material of the present invention is composed of a copolymer of an anhydropolyamino acid having at least one ethylenically unsaturated double bond in a molecule, a water-soluble monomer having an ethylenically unsaturated double bond and polysaccharides, and has high water absorption ratio and high water absorption rate in pure water or water having a low ion content and also has high absorption properties for high concentration salt-containing solutions.