Provided are crosslinked polymer compositions that include a first synthetic polymer containing multiple nucleophilic groups covalently bound to a second synthetic polymer containing multiple electrophilic groups. The first synthetic polymer is preferably a synthetic polypeptide or a polyethylene glycol...http://www.google.com/patents/US6969400?utm_source=gb-gplus-sharePatent US6969400 - Synthetic implant with nonimmunogenicity coating
