For example, shells are formed employing the aforesaid vinyl monomers having an isocyanate group or an epoxy group, or {TAIL ~ vinyl monomers} having a carboxyl group which react with an oxazoline group, and hydrazide crosslinking agents having an active hydrogen atom such as vinyl monomers having {HEAD ~ a group} which undergo crosslinking with aforesaid adipic acid hydrazide  
For example , shells are formed employing the aforesaid vinyl monomers having an isocyanate group or an epoxy group , or { TAIL ~ vinyl monomers } having a carboxyl group which react with an oxazoline group , and hydrazide crosslinking agents having an active hydrogen atom such as vinyl monomers having { HEAD ~ a group } which undergo crosslinking with aforesaid adipic acid hydrazide
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH