摘要:
The invention provides NO-releasing polymers and low molecular weight NO-releasing compounds which may be used to for the treatment of medical conditions associated with NO-deficiency. The NO-releasing polymers or the low molecular weight NO-releasing compounds may also be incorporated into medical devices. The invention further provides methods of controlled release of NO for the treatment of diseases and disorders associated with NO-deficiency, wherein the treatment includes systemic or local administration of the NO-releasing polymers or the low molecular weight NO-releasing compounds.
摘要:
Dendrimeric compounds and polymers are also provided wherein the dendrimer core is derived from the Michael reaction products. The branching pattern of the core and the multiplicity of the Michael addition lead to flexibility in designing and synthesizing dendrimeric materials.The Michael addition products are from a reaction between primary amines and activated α,β-unsaturated compounds exemplified by diethyl methylenemalonate (DEMM). In various embodiments, the reaction proceeds with high yields in the absence of strong base or Lewis acid catalyst under mild reaction conditions. Depending on the state of steric hindrance in the amine, the reaction products are a double Michael addition product or a so-called vicarious Michael addition reaction product.
摘要:
What is disclosed relates to polymers that resist dissolution in organic solvents, are vasodilators, and are tunable explosives. These polymers also form solvent resistant coatings and solvent resistant fibers as well as bonding materials.
摘要:
What is disclosed relates to polymers that resist dissolution in organic solvents, are vasodilators, and are tunable explosives. These polymers also form solvent resistant coatings and solvent resistant fibers as well as bonding materials.
摘要:
Phosphine oxide-containing polyarylene ethers and sulfides can be reacted with organoamines to form novel graft copolymers (with monofunctional amines) or novel crosslinked thermosetting network compositions (with multifunctional amines). The network materials show desirable resistance to a variety of organic solvents including chloroform.
摘要:
A vinyl acetate copolymer comprising the following general structure: ##STR1## wherein R is hydrogen or methylX is an organic linking group such as ##STR2## R.sup.1 is C.sub.1 -C.sub.4 alkyl; R.sub.f is a perfluorinated alkyl or poly(alkyleneoxy) group;m is 0 or 1;y is 50-99.999 mole %; andz is 0.001-50 mole %.The vinyl acetate copolymer is hydrolyzed to provide a vinyl alcohol copolymer that has excellent solvent barrier properties.
摘要:
A polymer-carbon sorbent for removing carbon dioxide, heavy metals and toxic materials from a flue gas from a combustion process, such as coal-fired power plants, is described. The sorbent comprises a carbonaceous sorbent material and a cured amine-containing polymer, and sulfur. The polymer-carbon sorbents are formed by curing a curable amine-containing polymer in the presence of the carbonaceous sorbent material, sulfur, a cure accelerator and, optionally, a cure activator. A convenient carbonaceous sorbent material is an activated carbon, and a convenient curable amine-containing polymer is an allyl-containing poly(ethyleneimine), having a number average molecular weight between about 1,000 and about 10,000. The polymer-carbon sorbents may contain sulfur in excess of an amount needed to cure the curable amine-containing polymer. Such polymer-carbon sorbents are shown to capture more mercury, in both elemental an ionic forms, compared to activated carbon and adsorb carbon dioxide.
摘要:
What is disclosed relates to polymers that resist dissolution in organic solvents, are vasodilators, and are tunable explosives. These polymers also form solvent resistant coatings and solvent resistant fibers as well as bonding materials.
摘要:
A vinyl acetate copolymer comprising the following general structure ##STR1## where R is hydrogen or methyl;R.sup.1 is a C.sub.6 -C.sub.18 hydrocarbyl group not containing an olefinic functionality;y is 92 to 99.5 mole %; andz is 0.5 to 8 mole %.The vinyl acetate copolymer is hydrolyzed to provide a vinyl alcohol copolymer that can be thermoplastically processed into shaped articles possessing good oxygen gas barrier properties.
摘要:
A vinyl alcohol copolymer comprising the following general structure: ##STR1## wherein R is hydrogen or methyl;X is an organic linking group such as ##STR2## R.sup.1 is C.sub.1 -C.sub.4 alkyl; R.sub.f is a perfluoronated alkyl or poly(alkyleneoxy) group;m is 0 or 1;x is 50-99.9 mole %;y is 0-50 mole %; andz is 0.001-50 mole %.The vinyl alcohol copolymer has excellent solvent barrier properties.