Coated pharmaceutical or nutraceutical preparation with enhanced pulsed active substance release

Coated pharmaceutical or nutraceutical preparation with enhanced pulsed active substance release

  • CN 101,903,017 A
  • Filed: 02/01/2008
  • Published: 12/01/2010
  • Est. Priority Date: 01/10/2008
  • Status: Active Grant
First Claim
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1. a kind of medicine or nutritional preparation, it is includedA) core, its material mainly worked comprising medicine or nutrient substance and the release to medicine or nutrient substance with modulation system;

  • WithB) key-course of the core is surrounded, it is includedI) one kind (methyl) acrylate copolymer or the mixture of a variety of (methyl) acrylate copolymers of 55 to the 92 weight % based on (methyl) the acrylic acid series copolymer gross weight being present among this layer, (methyl) acrylate copolymer is derived from (methyl) acrylic acid C by 80 to the 98 weight %'"'"'s based on (methyl) acrylic acid series copolymer weight1-C4The construction unit for being derived from (methyl) acrylate monomer containing quaternary ammonium group in the alkyl residue composition of the construction unit of alkyl esters and 2 to 20 weight % based on (methyl) acrylic acid series copolymer weight;

    WithIi one kind (methyl) acrylate copolymer or the mixture of a variety of (methyl) acrylate copolymers of 8 to the 45 weight %) based on (methyl) the acrylic acid series copolymer gross weight being present among this layer, (methyl) acrylate copolymer is made up of the construction unit for being derived from acrylic or methacrylic acid more than 5 to 59 weight % based on copolymer weight.

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