| 摘要 |
#CMT# #/CMT# Crosslinker-accelerator system for thermally crosslinking polyacrylates having functional groups, which are suitable for reacting with epoxy groups in a crosslinking reaction, comprises at least one compound containing at least one epoxy group, and at least one amine derivative (I). #CMT# : #/CMT# Crosslinker-accelerator system for thermally crosslinking polyacrylates having functional groups, which are suitable for reacting with epoxy groups in a crosslinking reaction, comprises at least one compound containing at least one epoxy group, and at least one amine derivative of formula ((R1) 2N-CR2R3-CR4R5-(CR6R7) n-X) (I). Either R1 : 1-8C alkyl or 1-8C cycloalkyl (both optionally substituted) or H; or R1+N : 5-7-membered ring (containing at least 4C and up to 1 further hetero atom); either R2-R7 : H or 1-8C alkyl; or R2+R3+R4+R5+R6+R7 : 5-7-membered cycloalkylene; n : 0-4; X : -OH, -OR, -SH, -SR or -PR2; and R : 1-18C alkyl (optionally branched and optionally substituted), 2-18C alkenyl, 2-18C alkynyl, aryl (optionally substituted) or aliphatic or aromatic heterocyclyl. Independent claims are also included for: (1) a thermally crosslinkable composition comprising at least one polyacrylate having functional groups, which are suitable for reacting with epoxy groups in a crosslinking reaction, and the above crosslinker-accelerator system; (2) a crosslinked polyacrylate obtainable by thermally crosslinking the above composition; and (3) thermally crosslinking the polyacrylates using the above crosslinker-accelerator system. #CMT#USE : #/CMT# The crosslinker-accelerator system is useful for thermally crosslinking polyacrylates having functional groups, which are suitable for reacting with epoxy groups in a crosslinking reaction, and for preparing thermally crosslinked polyacrylates. The crosslinked polyacrylate is useful as a pressure-sensitive adhesive (all claimed). #CMT#ADVANTAGE : #/CMT# The crosslinker-accelerator system ensures rapid crosslinking of the polyacrylates even at low temperatures, preferably at room temperature, does not result in uncontrolled reaction of polyacrylate hot melt composition during the crosslinking, exhibits long pot life, and thus it produces a uniform and bubble-free coating on carrier, and carries out post-crosslinking of the polyacrylates with less thermal energy. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic representation of compounding and coating of the polyacrylates. 1.1 : First feed point 1.2 : Second feed point 1.3 : Compounder #CMT#ORGANIC CHEMISTRY : #/CMT# Preferred Components: The ratio of total number of optionally substituted amino- and phosphino groups in (I) and the number of epoxy groups in the epoxy groups-containing compound is 0.2:1-4:1. #CMT#POLYMERS : #/CMT# Preferred Components: The ratio of total number of epoxy groups in the epoxy groups-containing compound and the number of functional groups in the polyacrylate is 0.01:1-1:1. The total proportion of the epoxy groups-containing compound in the composition is 0.1-5 wt.%, based on the pure polyacrylate to be crosslinked. The total proportion of (I) in the composition is 0.05-5 wt.%, based on the pure polyacrylate to be crosslinked. #CMT#DEFINITIONS : #/CMT# Preferred Definitions: R1 : CH 3. #CMT#EXAMPLE : #/CMT# No suitable example given. |
