IRAN POLYMER AND PETROCHEMICAL INSTITUTE Patent applications |
Patent application number | Title | Published |
20110223112 | UNSATURATED POLYESTER COATED MAGNETIC ULTRA-FINE PARTICLES FOR BIOLOGICAL APPLICATIONS - Unsaturated polyesters e.g. poly (ethylene glycol fumarate) (PEGF) were developed as new coating materials for iron oxide nanoparticles. Different strategies were adopted in their synthesis to provide different characteristics including solubility, molecular weight and structure also degrees of unsaturation. After synthesis of the nanoparticles; the material was applied as a coating on them. These materials were applicable without further processing, however, coatings were cured via thermal, redox or photo initiated crosslinking on the nanoparticles to provide rigid shells on the surface of nanoparticles. | 09-15-2011 |
20100166680 | METHOD FOR PRODUCTION OF BIOCOMPATIBLE NANOPARTICLES CONTAINING DENTAL ADHESIVE - A method of synthesizing hydroxyapatite nanorods, having high purity, high crystallinity and high aspect ratio is disclosed here. In one embodiment, high crystalline hydroxyapatite nanorods with relatively stoichiometric structure are prepared via hydrothermal method at 200° C. and under moderate acidic conditions. The synthesized hydroxyapatite nanorods have a diameter of 30-95 nm, a length of 850-1400 nm with an average aspect ratio of 24, degree of crystallinity of 73% and stoichiometry ratio of 1.69. Further it discloses the use of HAp in dental adhesive. The dental adhesive comprising synthesized HAp shows improved diametral tensile strength and high microshear bond strength. Energy dispersive X-ray mapping confirmed the uniform distribution of nanorods in the adhesive matrix. The synthesized hydroxyapatite nanorods have high colloidal stability in the dental adhesive solution. The nanorods are well dispersed and protected from aggregation by their high surface charges confirmed by zeta potential measurement. | 07-01-2010 |
20090298953 | Drug delivery system and method of making the same - Disclosed is a method for making a composition which comprises of an array of unsaturated, aliphatic, biocompatible and biodegradable polyesters with photo curing capability which upon mixing with an active ingredient will provide an inject able liquid or putty-like material. The composition can be injected via a customary syringe and needle and be photocured in situ using visible light irradiation. Changing in the network crosslinking, molecular weight of the linear polymeric precursors and their chemical structures can control delivery rate of the active ingredient from the device. | 12-03-2009 |