摘要:
The invention relates to an adhesive and binder for dermal or transdermal therapy systems, that includes (a) 85-99.9 weight % of (meth)acrylate copolymer of structural and functional monomers, where the functional monomers have tertiary or quaternary amino groups, (b) 0.1-15 weight % of an organic dicarboxylic or tricarboxylic acid, and (c) 40-70 weight %, relative to the total of (a) and (b), of a plasticizer.
摘要:
An adhesive binder for dermal or transdermal therapy systems consists of the following components:(a1) 55-99.9 wt. % of a (meth)acrylate copolymer of a structural (meth)acrylate or a functional (meth)acrylate monomer, wherein the functional monomer has a tertiary or quaternary amino group,(a2) 0.1-45 wt. % of an acid group-containing acrylate or (meth)acrylate polymer or copolymer, and(b) 25-80 wt. % of a plasticizer, based on the sum of (a1) and (a2).
摘要:
Processes for producing moldings by injection moulding, include melting a mixture made from a (meth)acrylate copolymer and a release agent, devolatilizing the mixture, injecting the molten and devolatilized mixture into a mold cavity of an injection mold, cooling the molten mixture, and removing the resultant molding from the mold.
摘要:
The invention relates to a process for making molded articles by means of injection molding with the process steps of a) melting of a (meth)acrylate copolymer, which is composed of 30 to 80 wt % of radical-polymerized C1 to C4 alkyl esters of acrylic or methacrylic acid and 70 to 20 wt % of (meth)acrylate monomers with a tertiary ammonium group in the alkyl residue, wherein the (meth)acrylate copolymer is present in a mixture with 1 to 70 wt % of a plasticizer and a desiccant in the ratio of 1:1 to 1:20 and also with 0.05 to 5 wt % of a release agent, and further standard additives or adjuvants and if necessary even a pharmaceutical active principle can also be present in the mixture, and before the mixture is melted it has a content of more than 0.5 wt % of low-boiling constituents with a vapor pressure of at least 1.9 bar at 120° C., b) degassing of the mixture in the thermoplastic condition at temperatures of at least 120° C., whereby the content of low-boiling constituents with a vapor pressure of at least 1.9 bar at 120° C. is lowered to at most 0.5 wt % and c) injection of the melted and degassed mixture into the mold cavity of an injection-molding die, wherein the mold cavity has a temperature which lies at least 10° C. below the glass transition temperature of the (meth)acrylate copolymer, cooling of the melt mixture and removal of the obtained molded article from the mold.
摘要:
The invention relates to an adhesive and binder for dermal or transdermal therapy systems, consisting of (a) a (meth)acrylate copolymer composed of radically polymerized C1 to C4 alkyl esters of acrylic or methacrylic acid and (meth)acrylate monomers with a cationic ammonium group in the alkyl radical, containing (b) 0.1-45 wt.-% with reference to (a) of an organic dicarboxylic or tricarboxylic acid or an acrylate or (meth)acrylate polymer or copolymer containing an acid group, as well as (c) 20-80 wt.-% with reference to (a) of a plasticizer, and (d) if necessary, a pharmaceutically active substance and/or pharmaceutically usual additives, characterized in that dibutyl sebacate is contained as the plasticizer.
摘要:
The invention relates to a process for producing mouldings by injection moulding the steps in the process being a) melting and mixing of a (meth)acrylate copolymer composed of from 85 to 98% by weight of C1-C4-alkyl (meth)acrylates capable of free-radical polymerization and from 15 to 2% by weight of (meth)acrylate monomers having a quaternary ammonium group in the alkyl radical, with from 10 to 25% by weight of a plasticizer, and also from 10 to 50% by weight of a dryers [sic] and/or from 0.1 to 3% by weight of a release agent, and, where appropriate, with other conventional pharmaceutical additives or auxiliaries and/or with an active pharmaceutical ingredient, b) devolatilizing the mixture at temperatures of at least 120° C., thus reducing the content of the low-boiling constituents with a vapour pressure of at least 1.9 bar at 120° C. to not more than 0.5% by weight, and c) injecting the devolatilized mixture at a temperature of from 80 to 160° C. into the mould of an injection moulding system and removing the resultant moulding from the mould.
摘要:
A dermal therapeutic system which exhibits a prolonged release of a drug comprising at least one pharmaceutical agent combined with poly(meth)acrylates in the form of at least one layer of the therapeutic system, the poly(meth)acrylates being a mixture, which is produced from a melt, comprising (1) at least one (meth)acrylic polymer containing functional groups and (2) at least one (meth)acrylic polymer which regulates the flow behavior of the poly(meth)acrylate mixture and which contains no functional groups or only insignificant amounts of functional groups.
摘要:
A coating composition for the enteric coating of capsule halves made of water-soluble or water-swellable polymer material in a dipping process is provided. The composition is an aqueous dispersion or solution, containing a polymer mixture of at least one first (meth)acrylate copolymer, which is enteric, and at least one further (meth)acrylate copolymer, which is enteric or water-insoluble, and also auxiliaries which influence the viscosity of the dispersion and the elasticity of the dried polymer film. The solids content of the dispersion or solution is more than 25% by weight and the viscosity is 150 to 1500 mPa·s and a dried film produced from the dispersion or solution has an elongation at break of at least 200%. Also provided is a capsule composed of two capsule halves coated with the dispersion or solution in a dipping process does. The enteric capsule does not dissolve in 0.1 N HCl at pH 1.2 after two hours, but completely dissolves in buffer at pH 6.8 in less than 30 minutes. A method to prepare enteric coated capsule halves is also provided.
摘要:
(EN) The invention relates to the use of a partially neutralized, anionic (meth)acrylate copolymer comprising radically polymerized units of 25 to 95 percent by weight of C1 to C4 alkyl esters of acrylic or methacrylic acid and 5 to 75 percent by weight of (meth)acrylate monomers with an anionic group, at least 4 percent of which are neutralized by means of a base, for producing a medicament that is provided with an active substance-containing core and is coated with the partially neutralized, anionic (meth)acrylate copolymer. Said medicament releases at least 30 percent of the active substance contained therein in 30 minutes at a pH at which the active substance is sufficiently soluble and stable and at which the corresponding medicament that is coated with the non-neutralized anionic (meth)acrylate polymer releases less than 10 percent of the active substance contained therein.
摘要:
The invention relates to a multilayer pharmaceutical dosage form for the controlled release of active substances, containing: a) a core layer containing a substance that acts in a modulatory manner with regard to the release of active substances, optionally a neutral core and/or an active substance; b) an inner control layer that influences the release of the substance that acts in a modulatory manner and of the optionally contained active substance from the core layer, containing pharmaceutically useable polymers, waxes, resins and/or proteins; c) an active substance layer containing a pharmaceutical active substance and, optionally, a substance that acts in a modulatory manner; d) an outer control layer containing a (meth)acrylate copolymer or a mixture consisting of a number of (meth)acrylate copolymers comprised of 98 to 85 C1-C4 alkyl esters of (meth)acrylic acid and 2 to 15% by weight of methacrylate monomers with a quaternary ammonium group in the alkyl radical and optionally containing pharmaceutically useable polymers that are insoluble in water, whereby the layers can contain, in addition and in a known manner, pharmaceutically conventional adjuvants.