摘要:
A branched, hybrid polymer obtainable by an addition polymerisation process, preferably a free-radical polymerisation process, comprising organic chains and inorganic chains wherein: (a) said polymer comprises at least two organic chains which are covalently linked by a bridge other than at their ends, (b) at least one inorganic chain is present, either as a covalently-bonded pendant group on an organic chain or within the bridge, and (c) the polymer comprises a residue of optionally but preferably a chain transfer agent and a residue of an initiator, optionally but preferably a free-radical initiator. The invention further provides a method for the synthesis of these polymers.
摘要:
The present invention relates to a solid composition and an aqueous dispersion comprising nanoparticles of the anti-retroviral drug lopinavir. The solid composition and aqueous dispersion additionally comprise a mixture of a hydrophilic polymer and a surfactant. The surfactant is selected from vitamin-E-polyethylene glycol-succinate (Vit-E-PEG-succinate), a polyoxyethylene sorbitan fatty acid ester, N-alkyldimethylbenzylammonium chloride, sodium deoxycholate, dioctyl sodium sulfosuccinate, polyethyleneglycol-12-hydroxystearate, polyvinyl alcohol (PVA), and a block copolymer of polyoxyethylene and polyoxypropylene, or a combination thereof. The hydrophilic polymer is suitably selected from polyvinyl alcohol (PVA), a polyvinyl alcohol-polyethylene glycol graft copolymer, a block copolymer of polyoxyethylene and polyoxypropylene, polyethylene glycol, hydroxypropyl methyl cellulose (HPMC), and polyvinylpyrrolidone, or a combination thereof. The present invention also relates to processes for preparing both the solid composition and the aqueous dispersion, as well as to their use in therapy for the treatment and/or prevention of retroviral infections such as human immunodeficiency virus (HIV).
摘要:
The present invention relates to a solid composition and an aqueous dispersion comprising nanoparticles of the anti-retroviral drug lopinavir. The solid composition and aqueous dispersion additionally comprise a mixture of a hydrophilic polymer and a surfactant. The surfactant is selected from vitamin-E-polyethylene glycol-succinate (Vit-E-PEG-succinate), a polyoxyethylene sorbitan fatty acid ester, N-alkyldimethylbenzylammonium chloride, sodium deoxycholate, dioctyl sodium sulfosuccinate, polyethyleneglycol-12-hydroxystearate, polyvinyl alcohol (PVA), and a block copolymer of polyoxyethylene and polyoxypropylene, or a combination thereof. The hydrophilic polymer is suitably selected from polyvinyl alcohol (PVA), a polyvinyl alcohol-polyethylene glycol graft copolymer, a block copolymer of polyoxyethylene and polyoxypropylene, polyethylene glycol, hydroxypropyl methyl cellulose (HPMC), and polyvinylpyrrolidone, or a combination thereof. The present invention also relates to processes for preparing both the solid composition and the aqueous dispersion, as well as to their use in therapy for the treatment and/or prevention of retroviral infections such as human immunodeficiency virus (HIV).
摘要:
The present invention relates to the use of branched addition copolymers in systems which can be cured post synthesis to form for example polymer coatings, sealants, inks, adhesives or composites and also relates to methods of preparing the cured systems, compositions comprising such copolymers and the use of the compositions in for example but not limited to coatings, inks, sealants, adhesives or composites.
摘要:
The present invention relates to a branched copolymer comprising a hydrophilic component obtainable by an addition polymerisation process and compositions and uses thereof said copolymer comprising: i) a residue of at least one monofunctional monomer comprising one polymerisable double bond per molecule and a molecular weight of less than 1000 Daltons; ii) a residue of at least one multifunctional monomer comprising at least two polymerisable double bonds per molecule and a molecular weight of less than 1000 Daltons; and wherein the end termini of the copolymer chains comprise one or more of a residue of a chain transfer agent; an initiator or a terminal group derived from a termination reaction; wherein; the molar ratio of the monofunctional monomer to multifunctional monomer is between 50:1 to 2.5:1 respectively; and wherein the hydrophilic component is comprised of at least 1 mole % of one or more residue of a multifunctional monomer and/or one or more residue of a chain transfer agent comprised of a hydrophilic monomer each with a solubility of 0.18 w/w % in water; and wherein the residue of the at least one monofunctional monomer with a molecular weight of less than 1000 Daltons is selected from the group comprising: vinyl acids, vinyl acid esters, vinyl aryl compounds, vinyl acid anhydrides, vinyl amides, vinyl ethers, vinyl amines, vinyl aryl amines, vinyl nitriles, vinyl ketones, and derivatives thereof; hydroxyl-containing monomers and monomers which can be post-reacted to form hydroxyl groups; acid-containing or acid functional monomers; zwitterionic monomers; quaternised amino monomers, oligomeric monomers; and corresponding allyl monomers of the aforesaid vinyl monomers.
摘要:
The present invention relates to a branched copolymer obtainable by an addition polymerisation process and uses and compositions thereof comprising: i) a residue of at least one monofunctional monomer comprising one polymerisable double bond per molecule and a molecular weight of less than 1000 Daltons; ii) a residue of at least one multifunctional monomer comprising at least two polymerisable double bonds per molecule and a molecular weight of less than 1000 Daltons; and wherein the end termini of the copolymer chains comprise one or more of a residue of a chain transfer agent; an initiator or a terminal group derived from a termination reaction; wherein; the molar ratio of the monofunctional monomer to multifunctional monomer is between 50:1 to 2.5:1 respectively; and wherein the hydrophilic component is comprised of at least 1 mole % of a combination of a monofunctional monomer, and a multifunctional monomer and/or a chain transfer agent when compared to the total content of monofunctional monomer which is/are comprised of hydrophilic component each with a solubility of 0.18 w/w % in water at 20° C.; and wherein the residue of the at least one monofunctional monomer with a molecular weight of less than 1000 daltons is selected from the group comprising: vinyl acids, vinyl acid ester, vinyl aryl compounds, vinyl acid anhydrides, vinyl amides, vinyl ethers, vinyl amines, vinyl aryl amines, vinyl nitriles, vinyl ketones, and derivatives thereof; hydroxyl-containing monomers and monomers which can be post-reacted to form hydroxyl groups; acid-containing or acid functional monomers; zwitterionic monomers; quaternised amino monomers, oligomeric monomers; and corresponding allyl monomers of the aforesaid vinyl monomers.
摘要:
The present invention relates to an amphiphilic branched copolymer obtainable by an addition polymerisation process, the method of production of same and uses thereof as emulsions wherein said polymer comprises: at least two chains which are covalently linked by a bridge other than at their ends; and wherein the at least two chains comprise at least one ethylenically monounsaturated monomer, and wherein the bridge comprises at least one ethylenically polyunsaturated monomer; and wherein the polymer comprises a residue of a chain transfer agent and optionally a residue of an initiator, and wherein at least one of the monounsaturated monomer(s) and polyunsaturated monomer(s) and chain transfer agent(s) is a hydrophilic residue; and at least one of one of the monounsaturated monomer(s) and polyunsaturated monomer(s) and chain transfer agent(s) is a hydrophobic residue, and wherein the mole ratio of polyunsaturated monomer(s) to monounsaturated monomer(s) is in a range of from 1:100 to 1:4, and wherein at least one of the monounsaturated monomer(s) and polyunsaturated monomer(s) and chain transfer agent(s) comprises a moiety that is capable of responding to an external stimuli thereby creating a physical or chemical change in the solubility of the said moiety; and wherein the air-water surface tension of the polymer changes from between 35 mN/m to 60 mN/m upon application of the external stimulus.
摘要:
The present invention relates to a branched copolymer obtainable by an addition polymerisation process and uses and compositions thereof comprising a hydrophilic component, said polymer comprising: i) a residue of at least one monofunctional monomer comprising one polymerisable double bond per molecule and a molecular weight of less than 1000 Daltons; ii) a residue of at least one multifunctional monomer comprising at least two polymerisable double bonds per molecule and a molecular weight of less than 1000 Daltons; and wherein the end termini of the copolymer chains comprise one or more of a residue of a chain transfer agent; an initiator or a terminal group derived from a termination reaction; wherein; the molar ratio of the monofunctional monomer to multifunctional monomer is between 50:1 to 2.5:1 respectively; and wherein the hydrophilic component is comprised solely of at least 1 mole % of one or more monofunctional monomer which is/are comprised of hydrophilic monomer each with a solubility of 0.18 w/w % in water at 20° C.; and wherein the residue of the at least one monofunctional monomer with a molecular weight of less than 1000 daltons is selected from the group comprising: vinyl acids, vinyl acid ester, vinyl aryl compounds, vinyl acid anhydrides, vinyl amides, vinyl ethers, vinyl amines, vinyl aryl amines, vinyl nitriles, vinyl ketones, and derivatives thereof; hydroxyl-containing monomers and monomers which can be post-reacted to form hydroxyl groups; acid-containing or acid functional monomers; zwitterionic monomers; quaternised amino monomers, oligomeric monomers; and corresponding allyl monomers of the aforesaid vinyl monomers.