CA2197866C - Medical contact adhesive - Google Patents
Medical contact adhesive Download PDFInfo
- Publication number
- CA2197866C CA2197866C CA002197866A CA2197866A CA2197866C CA 2197866 C CA2197866 C CA 2197866C CA 002197866 A CA002197866 A CA 002197866A CA 2197866 A CA2197866 A CA 2197866A CA 2197866 C CA2197866 C CA 2197866C
- Authority
- CA
- Canada
- Prior art keywords
- sensitive adhesive
- adhesive
- pressure
- amino groups
- basic amino
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/70—Web, sheet or filament bases ; Films; Fibres of the matrix type containing drug
- A61K9/7023—Transdermal patches and similar drug-containing composite devices, e.g. cataplasms
- A61K9/703—Transdermal patches and similar drug-containing composite devices, e.g. cataplasms characterised by shape or structure; Details concerning release liner or backing; Refillable patches; User-activated patches
- A61K9/7038—Transdermal patches of the drug-in-adhesive type, i.e. comprising drug in the skin-adhesive layer
- A61K9/7046—Transdermal patches of the drug-in-adhesive type, i.e. comprising drug in the skin-adhesive layer the adhesive comprising macromolecular compounds
- A61K9/7053—Transdermal patches of the drug-in-adhesive type, i.e. comprising drug in the skin-adhesive layer the adhesive comprising macromolecular compounds obtained by reactions only involving carbon to carbon unsaturated bonds, e.g. polyvinyl, polyisobutylene, polystyrene
- A61K9/7061—Polyacrylates
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/70—Web, sheet or filament bases ; Films; Fibres of the matrix type containing drug
- A61K9/7007—Drug-containing films, membranes or sheets
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09J133/08—Homopolymers or copolymers of acrylic acid esters
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur, or oxygen atoms in addition to the carboxy oxygen
Abstract
A medical pressure-sensitive adhesive based on polyacrylates is characterized in that it comprises the following components:
a) a self-adhesive polyacrylate copolymer containing at least 3 mol-per cent of copolymerized acrylic or methacrylic acid b) a polymer containing basic amino groups c) a plasticizer.
a) a self-adhesive polyacrylate copolymer containing at least 3 mol-per cent of copolymerized acrylic or methacrylic acid b) a polymer containing basic amino groups c) a plasticizer.
Description
MEDICAL CONTACT ADHESIVE
D E S C R I P T I O N
Materials with pressure-sensitive adhesive properties have been employed for a long time and for a very wide variety of uses in human medical care. Examples which may be mentioned are quick dressings, fixing plasters, self-adhesive electrodes, orthopaedic tapes and, in particular more recently, plasters containing an active substance.
Since these pressure-sensitive adhesives come into contact with human skin, an important requirement is that they must not have any primary skin irritation properties nor any allergenic potential. The allergenic potential is a specific problem of pressure-sensitive adhesives based on natural rubber or on comparable synthetic polymers. Since the latter are primarily nonadhesive, it is necessary to add so-called tackifiers which are usually derivatives of tree resins, i.e. rosin derivatives. These rosin derivatives are normally employed in the form of a mixture and, at least on repeated use, induce sometimes severe allergic reactions in a not inconsiderable number of people.
Modern pressure-sensitive adhesives based on synthetic polyacrylate polymers and silicones are self-adhesive merely on the basis of their molecular weight distribution and the monomers used, even without the addition of tackifiers, and have a very low allergenic potential. Such pressure-sensitive adhesives are termed hypoallergenic. Although it is possible to regard the problem of skin compatibility as having been solved with.these pressure-sensitive adhesives, even they do not meet all of the requirements that are to be made of high-performance medical pressure-sensitive adhesives.
One problem is that medical pressure-sensitive adhesives are employed on the human skin, which is subject to marked changes in condition from one individual to the next. For instance, as a=biological tissue the skin alters its substrate properties in dependence on the particular living conditions and/or environmental conditions. A major problem here is the sweating of the skin under physical stress and/or under conditions of illness, and at high ambient temperatures. Nevertheless, a medical pressuresensitive adhesive must ensure secure adhesion to the skin even under these conditions. One possible way of achieving this is to make the pressure-sensitive adhesive as aggressive as possible in its adhesion. The corollary of this, however, is that the adhesive is then very soft, and it is virtually impossible to avoid the unwanted situation where residues of adhesive remain stuck to the skin.
An ideal pressure-sensitive adhesive, therefore, should possess a minimal degree of tackiness which changes into a more aggressive tackiness only under the action of moisture.
In the case of polyacrylate adhesives, the tackiness is determined by the nature of the monomers used for the synthesis and, in particular, by its mean molecular weight and the molecular weight distribution. Here, low molecular weights lead to a soft and aggressive adhesive.
The object of the invention is to provide a pressuresensitive adhesive of adequate minimal adhesion which changes its molecular weight distribution under the action of moisture and, in doing so, passes into a state of more aggressive tackiness.
This object is achieved by means of the invention for a pressure-sensitive adhesive based on polyacrylates through a composition which is crosslinkable through metal chelates and has no skin-irritating and no allergenic effects. The composition comprises the following components:
a) a self-adhesive polyacrylate copolymer containing at least 3 mol-per cent of copolymerized acrylic or methacrylic acid b) a polymer containing basic amino groups c) a plasticizer.
Following removal of solvent, the medical pressure-sensitive adhesive comprises:
a) 75 - 94 % by weight of self-adhesive polyacrylate copolymer containing at least 3 mol-per cent of copolymerized acrylic or methacrylic acid, b) 1 - 20 % by weight of polymer containing basic amino groups, and c) 5 - 20 % by weight of plasticizer.
The polymer containing basic amino groups can be a polyacrylate or polymethacrylate copolymer and contain amino alcohol esters of acrylic or methacrylic acid incorporated by polymerization. The polymer containing basic amino groups can be dimethylaminoethyl methacrylate and neutral methacrylic esters.
The said adhesive is suitable for use in the preparation of quick dressings, fixing plasters or self-adhesive electrodes and of plasters containing an active substance.
Within this adhesive there is an interaction between the acidic carboxyl groups of the polyacrylate polymer and the polymer containing basic groups. The adhesive is therefore in a state of crosslinking which results in an increase in molecular weight.
Crosslinking reactions play an important part with regard to polyacrylate adhesives. If the adhesive possesses hydroxyl or carboxyl groups, then it is possible by adding, say, metal chelates to crosslink the adhesive in the course of removing the solvents. In that case one speaks of autocrosslinking adhesives. The advantage of these adhesives is that solutions of adhesive are obtained which combine a high solids content with low viscosity. With these adhesives, the ultimate molecular weight distribution is established only after the solvents have been removed.
Whereas this type of crosslinking is irreversible, crosslinking through the interaction of basic and acidic functional groups remains fully reversible.
Since, in this case, the crosslinking is brought about not by chemical bonding but merely by way of electrostatic forces, it can be weakened by - for example - water as a result of its high dielectric constant. In this case the adhesive behaves as if it is changing its molecular weight distribution. It becomes softer, begins to adhere more aggressively, and thus adapts to the particular requirements. This type of crosslinking can therefore be termed "dynamic crosslinking". Since the skin, depending on the prevailing circumstances, gives off a greater or lesser amount of moisture, this effect also occurs in the case of the adhesive of novel composition when applied to the skin.
D E S C R I P T I O N
Materials with pressure-sensitive adhesive properties have been employed for a long time and for a very wide variety of uses in human medical care. Examples which may be mentioned are quick dressings, fixing plasters, self-adhesive electrodes, orthopaedic tapes and, in particular more recently, plasters containing an active substance.
Since these pressure-sensitive adhesives come into contact with human skin, an important requirement is that they must not have any primary skin irritation properties nor any allergenic potential. The allergenic potential is a specific problem of pressure-sensitive adhesives based on natural rubber or on comparable synthetic polymers. Since the latter are primarily nonadhesive, it is necessary to add so-called tackifiers which are usually derivatives of tree resins, i.e. rosin derivatives. These rosin derivatives are normally employed in the form of a mixture and, at least on repeated use, induce sometimes severe allergic reactions in a not inconsiderable number of people.
Modern pressure-sensitive adhesives based on synthetic polyacrylate polymers and silicones are self-adhesive merely on the basis of their molecular weight distribution and the monomers used, even without the addition of tackifiers, and have a very low allergenic potential. Such pressure-sensitive adhesives are termed hypoallergenic. Although it is possible to regard the problem of skin compatibility as having been solved with.these pressure-sensitive adhesives, even they do not meet all of the requirements that are to be made of high-performance medical pressure-sensitive adhesives.
One problem is that medical pressure-sensitive adhesives are employed on the human skin, which is subject to marked changes in condition from one individual to the next. For instance, as a=biological tissue the skin alters its substrate properties in dependence on the particular living conditions and/or environmental conditions. A major problem here is the sweating of the skin under physical stress and/or under conditions of illness, and at high ambient temperatures. Nevertheless, a medical pressuresensitive adhesive must ensure secure adhesion to the skin even under these conditions. One possible way of achieving this is to make the pressure-sensitive adhesive as aggressive as possible in its adhesion. The corollary of this, however, is that the adhesive is then very soft, and it is virtually impossible to avoid the unwanted situation where residues of adhesive remain stuck to the skin.
An ideal pressure-sensitive adhesive, therefore, should possess a minimal degree of tackiness which changes into a more aggressive tackiness only under the action of moisture.
In the case of polyacrylate adhesives, the tackiness is determined by the nature of the monomers used for the synthesis and, in particular, by its mean molecular weight and the molecular weight distribution. Here, low molecular weights lead to a soft and aggressive adhesive.
The object of the invention is to provide a pressuresensitive adhesive of adequate minimal adhesion which changes its molecular weight distribution under the action of moisture and, in doing so, passes into a state of more aggressive tackiness.
This object is achieved by means of the invention for a pressure-sensitive adhesive based on polyacrylates through a composition which is crosslinkable through metal chelates and has no skin-irritating and no allergenic effects. The composition comprises the following components:
a) a self-adhesive polyacrylate copolymer containing at least 3 mol-per cent of copolymerized acrylic or methacrylic acid b) a polymer containing basic amino groups c) a plasticizer.
Following removal of solvent, the medical pressure-sensitive adhesive comprises:
a) 75 - 94 % by weight of self-adhesive polyacrylate copolymer containing at least 3 mol-per cent of copolymerized acrylic or methacrylic acid, b) 1 - 20 % by weight of polymer containing basic amino groups, and c) 5 - 20 % by weight of plasticizer.
The polymer containing basic amino groups can be a polyacrylate or polymethacrylate copolymer and contain amino alcohol esters of acrylic or methacrylic acid incorporated by polymerization. The polymer containing basic amino groups can be dimethylaminoethyl methacrylate and neutral methacrylic esters.
The said adhesive is suitable for use in the preparation of quick dressings, fixing plasters or self-adhesive electrodes and of plasters containing an active substance.
Within this adhesive there is an interaction between the acidic carboxyl groups of the polyacrylate polymer and the polymer containing basic groups. The adhesive is therefore in a state of crosslinking which results in an increase in molecular weight.
Crosslinking reactions play an important part with regard to polyacrylate adhesives. If the adhesive possesses hydroxyl or carboxyl groups, then it is possible by adding, say, metal chelates to crosslink the adhesive in the course of removing the solvents. In that case one speaks of autocrosslinking adhesives. The advantage of these adhesives is that solutions of adhesive are obtained which combine a high solids content with low viscosity. With these adhesives, the ultimate molecular weight distribution is established only after the solvents have been removed.
Whereas this type of crosslinking is irreversible, crosslinking through the interaction of basic and acidic functional groups remains fully reversible.
Since, in this case, the crosslinking is brought about not by chemical bonding but merely by way of electrostatic forces, it can be weakened by - for example - water as a result of its high dielectric constant. In this case the adhesive behaves as if it is changing its molecular weight distribution. It becomes softer, begins to adhere more aggressively, and thus adapts to the particular requirements. This type of crosslinking can therefore be termed "dynamic crosslinking". Since the skin, depending on the prevailing circumstances, gives off a greater or lesser amount of moisture, this effect also occurs in the case of the adhesive of novel composition when applied to the skin.
In accordance with the invention, a plasticizer is mixed in with the pressure-sensitive adhesive in order to achieve a certain minimum or basic tackiness. The amount of this plasticizer is guided by the desired adhesion properties of the self-adhesive polyacrylate and by the degree of crosslinking as a result of the added polymer containing basic groups. Where the self-adhesive polyacrylates are of low molecular weight, chemical crosslinking of these polymers must additionally be undertaken. This is done by adding metal chelates, for example aluminium acetylacetonate, or other suitable substances.
Suitable plasticizers are, in principle, all compounds of low molecular mass that are compatible with the polymers. It should be borne in mind here that these plasticizers possess good skin compatibility. Compounds which have been found particularly suitable are fatty acid derivatives of glycerol, and also triacetin.
Admittedly, there are other known adhesives which alter their adhesion properties in the presence of water.
Recall, for example, a postage-stamp adhesive which develops its adhesive properties only on wetting. This type of adhesive, however, has the critical disadvantage that it offers virtually no resistance to moisture and will break up if there is a surplus of water.
A pressure-sensitive adhesive in the context of the invention is, in contrast, highly water-resistant. In water of neutral pH it is virtually insoluble.
Furthermore, it possesses outstanding adhesion properties even under very adverse conditions. It can be used everywhere that there is a requirement for effective and reliable adhesion on the skin over a prolonged period. It can be used with particular advantage for fixing cannulas and catheters, with electrodes for recording biosignals, with allergy testing plasters, with orthopaedic tapes and, last but not least, for plasters containing an active substance.
Example:
Preparing a self-adhesive film 209 g of self-adhesive, carboxyl-containing polyacrylate (Durotak'rM 901-1051, 52 % g/g in ethyl acetate/n-heptane mixture) 4.8 g of polyacrylate containing basic amino groups (50 % g/g in ethanol) (Eudragit- E 100) 8 g of triacetin 15 g of ethanol and 3.15 g of aluminium acetylacetonate (4 % g/g in ethyl acetate) are stirred together and are coated as a 350 pm thick film onto a siliconized polyester sheet. The film is dried at 50 C for 30 minutes, after which it has a weight per unit area of 120 g/m2.
Depending on the intended application, the dried film can be laminated with woven textile fabrics, knitted fabrics or nonwovens.
Suitable plasticizers are, in principle, all compounds of low molecular mass that are compatible with the polymers. It should be borne in mind here that these plasticizers possess good skin compatibility. Compounds which have been found particularly suitable are fatty acid derivatives of glycerol, and also triacetin.
Admittedly, there are other known adhesives which alter their adhesion properties in the presence of water.
Recall, for example, a postage-stamp adhesive which develops its adhesive properties only on wetting. This type of adhesive, however, has the critical disadvantage that it offers virtually no resistance to moisture and will break up if there is a surplus of water.
A pressure-sensitive adhesive in the context of the invention is, in contrast, highly water-resistant. In water of neutral pH it is virtually insoluble.
Furthermore, it possesses outstanding adhesion properties even under very adverse conditions. It can be used everywhere that there is a requirement for effective and reliable adhesion on the skin over a prolonged period. It can be used with particular advantage for fixing cannulas and catheters, with electrodes for recording biosignals, with allergy testing plasters, with orthopaedic tapes and, last but not least, for plasters containing an active substance.
Example:
Preparing a self-adhesive film 209 g of self-adhesive, carboxyl-containing polyacrylate (Durotak'rM 901-1051, 52 % g/g in ethyl acetate/n-heptane mixture) 4.8 g of polyacrylate containing basic amino groups (50 % g/g in ethanol) (Eudragit- E 100) 8 g of triacetin 15 g of ethanol and 3.15 g of aluminium acetylacetonate (4 % g/g in ethyl acetate) are stirred together and are coated as a 350 pm thick film onto a siliconized polyester sheet. The film is dried at 50 C for 30 minutes, after which it has a weight per unit area of 120 g/m2.
Depending on the intended application, the dried film can be laminated with woven textile fabrics, knitted fabrics or nonwovens.
Claims (7)
1. A medical pressure-sensitive adhesive based on polyacrylates, having a minimal degree of tackiness in the state of application and whose tackiness increases upon action of moisture, due to reversible crosslinking, the adhesive comprising:
a) a self-adhesive polyacrylate copolymer containing at least 3 mol-per cent of acrylic acid or methacrylic acid subunits;
b) a polymer containing basic amino groups;
c) a plasticizer formed by triacetin or glycerol fatty acid ester; and d) a metal chelate as crosslinking agent.
a) a self-adhesive polyacrylate copolymer containing at least 3 mol-per cent of acrylic acid or methacrylic acid subunits;
b) a polymer containing basic amino groups;
c) a plasticizer formed by triacetin or glycerol fatty acid ester; and d) a metal chelate as crosslinking agent.
2. The medical pressure-sensitive adhesive according to Claim 1, comprising:
a) 91.1 % by weight of self-adhesive polyacrylate copolymer containing at least 3 mol-per cent of copolymerized acrylic or methacrylic acid;
b) 2.1 % by weight of polymer containing basic amino groups;
c) 6.7% by weight of plasticizer; and d) 0.1 % by weight of a metal chelate.
a) 91.1 % by weight of self-adhesive polyacrylate copolymer containing at least 3 mol-per cent of copolymerized acrylic or methacrylic acid;
b) 2.1 % by weight of polymer containing basic amino groups;
c) 6.7% by weight of plasticizer; and d) 0.1 % by weight of a metal chelate.
3. The medical pressure-sensitive adhesive according to claim 1 or 2, wherein the polymer containing basic amino groups is a polyacrylate or polymethacrylate copolymer and contains, incorporated by polymerization, amino alcohol esters of acrylic or methacrylic acid.
4. The medical pressure-sensitive adhesive according to claim 1 or 2, wherein the polymer containing basic amino groups comprises dimethylaminoethyl methacrylate and neutral methacrylic esters.
5. The medical pressure-sensitive adhesive of any claims 1 to 4 wherein the metal chelate is aluminum acetylacetone.
6. Use of the pressure-sensitive adhesive according to any one of claims 1 to 5 for producing quick dressings, fixing plasters or self-adhesive electrodes.
7. Use of pressure-sensitive adhesive according to any one of claims 1 to 5 for producing medicated plasters.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4429791A DE4429791C2 (en) | 1994-08-23 | 1994-08-23 | Medical pressure sensitive adhesive based on polyacrylates and its use |
| DEP4429791.2 | 1994-08-23 | ||
| PCT/EP1995/003200 WO1996005813A1 (en) | 1994-08-23 | 1995-08-12 | Medical contact adhesive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2197866A1 CA2197866A1 (en) | 1996-02-29 |
| CA2197866C true CA2197866C (en) | 2008-10-07 |
Family
ID=6526293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002197866A Expired - Fee Related CA2197866C (en) | 1994-08-23 | 1995-08-12 | Medical contact adhesive |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP0777468B1 (en) |
| JP (1) | JPH10504552A (en) |
| AT (1) | ATE185068T1 (en) |
| CA (1) | CA2197866C (en) |
| DE (2) | DE4429791C2 (en) |
| DK (1) | DK0777468T3 (en) |
| ES (1) | ES2139931T3 (en) |
| GR (1) | GR3032070T3 (en) |
| WO (1) | WO1996005813A1 (en) |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19628999C1 (en) * | 1996-07-18 | 1998-03-12 | Lohmann Gmbh & Co Kg | Medical pressure sensitive adhesives with high water vapor permeability and adhesive strength and plasters provided with them and their use |
| DE19643007A1 (en) * | 1996-10-18 | 1998-04-23 | Martin Dr Schaerfe | Bonding agent for improving the adhesion between tooth substance and fillings, bonding agents for artificial teeth, etc |
| DE19653605C2 (en) * | 1996-12-20 | 2002-11-28 | Roehm Gmbh | Adhesives and binders for dermal or transdermal therapy systems and their use for producing a transdermal therapy system |
| US6720387B1 (en) * | 1998-02-18 | 2004-04-13 | 3M Innovative Properties Company | Hot-melt adhesive compositions comprising acidic polymer and basic polymer blends |
| DE19901085C2 (en) * | 1999-01-14 | 2003-12-18 | Lohmann Therapie Syst Lts | Transdermal therapeutic system with a self-adhesive matrix containing organic acid addition salts of morphine or morphine type alkaloids |
| DE19918106A1 (en) | 1999-04-22 | 2000-10-26 | Lohmann Therapie Syst Lts | Transdermal patches containing basic or neutral drug include adhesive (meth)acrylic acid polymer in alkali(ne earth) metal salt form |
| JP2001089731A (en) * | 1999-09-20 | 2001-04-03 | Lintec Corp | Pressure-sensitive adhesive composition and adhesive optical function member made thereof |
| DE10035891A1 (en) | 2000-07-24 | 2002-02-14 | Lohmann Therapie Syst Lts | Medical pressure sensitive adhesive with a two-phase adhesive matrix made of polyacrylates and polyamine salts |
| SE519451C2 (en) * | 2000-10-02 | 2003-03-04 | Moelnlycke Health Care Ab | Dry skin-friendly glue that affects the skin's pH value |
| DE10061718A1 (en) * | 2000-12-12 | 2002-06-13 | Creavis Tech & Innovation Gmbh | Binder made from (meth) acrylate polymer compositions with adjustable electrical and thermal properties |
| US6949297B2 (en) | 2001-11-02 | 2005-09-27 | 3M Innovative Properties Company | Hybrid adhesives, articles, and methods |
| US6887917B2 (en) | 2002-12-30 | 2005-05-03 | 3M Innovative Properties Company | Curable pressure sensitive adhesive compositions |
| US7927703B2 (en) * | 2003-04-11 | 2011-04-19 | 3M Innovative Properties Company | Adhesive blends, articles, and methods |
| ITMI20041628A1 (en) | 2004-08-06 | 2004-11-06 | Bouty S P A | THERAPEUTIC SYSTEM WITH CONTROLLED RELEASE FOR TOPICAL TRANSDERMAL USE |
| WO2007055176A1 (en) * | 2005-11-11 | 2007-05-18 | Hisamitsu Pharmaceutical Co., Inc. | Pressure-sensitive adhesive base and adhesive patch of percutaneous absorption type |
| JP5193674B2 (en) * | 2007-06-01 | 2013-05-08 | 日東電工株式会社 | Patches and patch preparations |
| JP5368168B2 (en) * | 2008-06-16 | 2013-12-18 | 日東電工株式会社 | Patches and patch preparations |
| ES2642274T3 (en) * | 2011-02-02 | 2017-11-16 | Nitto Denko Corporation | Patch Preparation |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0794384B2 (en) * | 1986-09-01 | 1995-10-11 | 帝国製薬株式会社 | Sustained-release oral formulation |
| DE3643987A1 (en) * | 1986-12-22 | 1988-06-23 | Lohmann Therapie Syst Lts | BASIC, ACTIVE SUBSTANCE-ADHESIVE ADHESIVE POLYMER, IN PARTICULAR FOR USE WITH BASIC ACTIVE SUBSTANCES, PROCESS FOR THEIR PRODUCTION AND THEIR USE |
| DE3843238C1 (en) * | 1988-12-22 | 1990-02-22 | Lohmann Therapie Syst Lts | |
| DE4301783C1 (en) * | 1993-01-23 | 1994-02-03 | Lohmann Therapie Syst Lts | Transdermal system per admin. of galanthamine - esp. for treatment of Alzheimer's disease and alcohol addiction |
-
1994
- 1994-08-23 DE DE4429791A patent/DE4429791C2/en not_active Expired - Fee Related
-
1995
- 1995-08-12 EP EP95929855A patent/EP0777468B1/en not_active Expired - Lifetime
- 1995-08-12 CA CA002197866A patent/CA2197866C/en not_active Expired - Fee Related
- 1995-08-12 DK DK95929855T patent/DK0777468T3/en active
- 1995-08-12 ES ES95929855T patent/ES2139931T3/en not_active Expired - Lifetime
- 1995-08-12 AT AT95929855T patent/ATE185068T1/en active
- 1995-08-12 WO PCT/EP1995/003200 patent/WO1996005813A1/en active IP Right Grant
- 1995-08-12 DE DE59506963T patent/DE59506963D1/en not_active Expired - Lifetime
- 1995-08-12 JP JP8507753A patent/JPH10504552A/en active Pending
-
1999
- 1999-12-08 GR GR990403161T patent/GR3032070T3/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| WO1996005813A1 (en) | 1996-02-29 |
| DE59506963D1 (en) | 1999-11-04 |
| GR3032070T3 (en) | 2000-03-31 |
| DE4429791C2 (en) | 1997-04-24 |
| DE4429791A1 (en) | 1996-02-29 |
| EP0777468B1 (en) | 1999-09-29 |
| CA2197866A1 (en) | 1996-02-29 |
| EP0777468A1 (en) | 1997-06-11 |
| JPH10504552A (en) | 1998-05-06 |
| ATE185068T1 (en) | 1999-10-15 |
| DK0777468T3 (en) | 2000-04-10 |
| ES2139931T3 (en) | 2000-02-16 |
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| TH14700A (en) | Acetates containing a pressure-sensitive adhesives with a high strength. |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20130813 |