Use of isophoronediamine isomer mixtures in polyaddition resins

Details Use of isophoronediamine isomer mixtures in polyaddition resins Use of isophoronediamine isomer mixtures in polyaddition resins

1993-09-09

1994-12-13

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525113, 525406, 525523, 528122, 528250, 528297, 528407, 528418, 528421, C08G 5950, C08L 6300, C08L 6306, C08F28310

Patent

active

053730682

ABSTRACT:
Use of isophoronediamine isomer mixtures containing more than 40%, preferably more than 50 up to 70%, of the trans-isomer and less than 60%, preferably less than 50 down to 30%, of the cis-isomer as reactant in polyaddition resins selected from epoxy, polyurethane and polyurea resins. As curing agents in epoxy resins compared with previously known isomer mixtures, the isomer mixtures containing more than 40% of the trans-isomer and less than 60% of the cis-isomer unexpectedly lead to an extended pot life with simultaneously reduced maximum curing temperature and therefore reduced shrinkage problems. The isomer mixtures are also surprisingly suitable as amine components with reduced reactivity for the chain extension of polyurethane/polyureas.

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