By Thomas F. DeRosa
The target of this booklet is to show to educational and business researchers and scholars advances in man made and characterization equipment in nine chosen parts of polymer chemistry mentioned in 2007-2008 US Patents. It reports the influence of more recent bulk anionic, cationic, and unfastened radical polymerization tools inside chosen commercial purposes. Bulk and floor crosslinking brokers utilizing chosen bi- and tri-functional reagents, photochemical equipment, or loose radical brokers also are reviewed. ultimately, there's a separate part on cationic and cationic ring establishing polymerization reactions describing di- and tri-heterocyclic monomers and their use in clinical units.
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Additional info for Advances in Polymer Chemistry and Methods Reported in Recent US Patents
Somerville, NJ) SIGNIFICANCE Biodegradable and biocompatible a,b-unsaturated polyesters have been prepared by condensing maleic anhydride with monoleoyl glycerol alone or in combination with monoleoyl glycerol polyethylene glycol. Mercaptoethylamine was then free radically incorporated into the a,b-unsaturated site using azobisisobutyronitrile. These polymeric agents were used to prepare medical devices including sutures, staples, surgical tacks, clips, and plates. REACTION O O O O O C17H30 i O O O C17 H 30 O ii O OH OH O O O O O C17 H 30 O O S S O O O O O a a H2N NH2 i: Monoleoyl glycerol, maleic anhydride ii: DMF, 2,20 -azobisisobutyronitrile, mercaptoethylamine EXPERIMENTAL 1.
US Patent 7,045,248 (October 4, 2005) b NCO C. -F. , US Patent Application 2007-0104654 (May 10, 2007) Assignee: Industrial Technology Research Institute (Hsinchu, TW) SIGNIFICANCE A biocompatible and biodegradable amphiphilic block copolymer consisting of hydrophobic and hydrophilic segments containing zwitterions has been prepared. This agent is useful as a drug delivery agent for water-insoluble drugs, including growth factors and genes, and in cosmetic formulations. REACTION O O i H3CO O O O Nanoparticles iv ii bH a H3CO H3CO O O a O O a O O O b P O O N(CH3)3 O P O O iii i: Poly(ethylene glycol), stannous 2-ethylhexanoate ii: Triethylamine, 2-chloro-2-oxo-1,3,2-dioxaphospholane, CH2Cl2 iii: Acetonitrile, trimethylamine, CH2Cl2 EXPERIMENTAL 1.
TESTING In vivo Testing The Step 3 product was ground and sieved with a mortar and pestle and passed through a 125 m sieve. 75 mg of the experimental agent by injection in a medium consisting of 2% carboxymethylcellulose, 1% Tween 20Ò, and saline. Blood samples were collected at various time intervals, and the plasma levels of LanreotideÒ was determined by radioimmuno assay. Test results for are provided in Table 1. Notes TABLE 1. assay. 09 Entry 4 was obtained by replacing NaOH with an equivalent amount of NaHCO3 in Step 3.