摘要:
The present invention provides a process for producing an amino acid N-carboxyanhydride, which comprises reacting an amino acid or a derivative thereof with a compound represented by the following formula (1): wherein R1 and R2 represent the same or different electron-withdrawing substituents and each independently are an optionally substituted acyl group, an optionally substituted alkyloxycarbonyl group, an optionally substituted perfluoroalkyl group, an optionally substituted perchloroalkyl group, a cyano group, a halogen atom, or a nitro group; and a and b are the same or different and each are an integer of 1-5.
摘要:
The present invention provides a process for producing an amino acid N-carboxyanhydride, which comprises reacting an amino acid or a derivative thereof with a compound represented by the following formula (1): wherein R1 and R2 represent the same or different electron-withdrawing substituents and each independently are an optionally substituted acyl group, an optionally substituted alkyloxycarbonyl group, an optionally substituted perfluoroalkyl group, an optionally substituted perchloroalkyl group, a cyano group, a halogen atom, or a nitro group; and a and b are the same or different and each are an integer of 1-5.
摘要:
The present invention relates to a method for preparing polymers by gas-phase deposition polymerization, initiated by a zero valent metal and an initiator.
摘要:
The present invention relates to a method for preparing polymers by gas-phase deposition polymerization, initiated by a zero valent metal and an initiator.
摘要:
The present invention relates to a polymerization catalyst, comprising at least two components, wherein at least one or more of said at least two components are selected from the group of nitrogen containing heterocycles and/or their derivatives and at least one or more of said at least two components is selected from the group of organic sulfur containing acids and/or derivatives of organic sulfur containing acids.
摘要:
The present invention relates to a catalyst, which is an organic component with electron withdrawing substituents and to compositions with such catalyst and at least one benzoxazine component, and the use of such compositions in adhesives, sealants and coatings.
摘要:
Polymerizable combinations, comprising at least one first component selected from the group of benzoxazine monomers and at least one second component selected from the group of aromatic esters are described. Furtheron the use of aromatic esters as additives to benzoxazine monomers as well as methods of coating a device by heating the above mentioned combination, and a device, coated by that way is explained.
摘要:
The present invention relates to compositions comprising an epoxy resin; a reagent selected from the group of cationic compounds or compounds which are capable to form cationic compounds or mixtures of those; at least one compound with two aromatic rings and at least one central cyclic oxygen bridged ring and the use of such compositions in adhesives, sealants and coatings.