摘要:
Compounds useful as biologically active compounds are disclosed. The compounds have the following structure (I): structure (I) or a stereoisomer, tautomer or salt thereof, wherein R 1 , R 2 , R 3 , L, L 1 , L 2 , L 3 , L 4 , M and n are as defined herein. Methods associated with preparation and use of such compounds are also provided.
摘要:
A composition includes a biodegradable hydrogel that includes a hydrogel forming base polymer and a plurality of physiologically degradable ester linkages, amide linkages, azide-alkyne cycloaddition linkages, acrylate-thiol linkages, urethane linkages, and/or methacrylate-thiol linkages, a polynucleotide coupling polymeric molecule; and a polynucleotide. The polynucleotide is released under physiological conditions in a spatial and/or temporally controlled or predetermined manner from the composition.
摘要:
Functionalized non-halogenated flame retardants are disclosed having improved hydrolytic stability, represented by decreased conductivity measured in units of ?S/cm when immersed in distilled water and heated to 80C. The functionalized flame retardant comprises polyphosphonate functionalized by epoxy-functional styrene-acrylic oligomer or aromatic carbodiimide, and optionally antioxidant. Also disclosed are polymer compounds, comprising the functionalized flame retardant described above and a second polymer resin; and flame retardant plastic articles made from such polymer compounds.
摘要:
Disclosed are oligomeric phosphonates, and in particular, hyperbranched oligophosphonates, that include oligophosphonates, random or block co-oligo(phosphonate ester)s and co-oligo(phosphonate carbonate)s produced using a condensation process terminated with hydroxyl, epoxy, vinyl, vinyl ester, isopropenyl, isocyanate groups, and the like. These materials can be used as a reactive additive to other polymers, oligomers or monomer mixtures to impart flame resistance without diminishing melt processability which is important in the fabrication of polymers for many applications.
摘要:
Disclosed are polymers with a complex branched structure (star-or tree-shaped) obtainable by polymerizinga bifunctional type AB monomer and/or type AA+BB monomers in the presence of: a) one or more polyamine and/or a polyacid and/or a polyalcohol and/or more generally a compound (such as POSS) having at least three functional groups such asamino, carboxylic acid or hydroxyl functions; b) one or more phosphorus containing molecules reacting with only one reactive group during the polymerization; c) optionally one or more organic acid and/or an amine and/or an alcohol having one or two functional groups.
摘要:
An alkylphenol-free liquid polymeric phosphite is described of Structure (IV), wherein each R 1 , R 2 , R 3 and R 4 can be the same or different and independently selected from the group consisting of C 1-20 alkyl, C 3-22 alkenyl, C 6-40 cycloalkyl, C 7-40 cycloalkylene, C 1-20 methoxy alkyl glycol ethers, C 1-20 alkyl glycol ethers, and or Y-OH; Y is selected from the group consisting of C 2-40 alkylene, C 2-40 alkyl lactone, -R 7 -N(R 8 )-R 9 -, wherein R 7 , R 8 and R 9 are independently selected from the group previously defined for R 1 , R 2 , R 3 and R 4 , now further including H; m is an integral value ranging from 2 to 100 inclusive; and x is an integral value ranging from 1 to 1,000. The alkylphenol-free liquid polymeric phosphite is useful in reducing phosphite migration within polymers.