Film-forming agent for drug delivery and preparation for percutaneous administration containing the same
First Claim
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1. A film-forming agent characterized in comprising 50˜
- 99% by weight of the following polyurethane (A) and 1˜
50% by weight of the following addition polymerization polymer (B) having a functional group of carboxylic acid derivative;
(A) Polyurethane with weight average molecular weight of 10,000˜
500,000, which is prepared by polymerization of the following ingredient (a-1), (a-2), and (a-3), and represented with the following formula 1;
(a-1) polyethylene glycol;
(a-2) polydiol with hydroxyl groups at both ends, which has stronger hydrophobicity than the said (a-1); and
(a-3) diisocyanate having isocyanate at both ends and (B) The addition polymerization polymer with a functional group of carboxylic acid derivative has weight average molecular weight of 10,000˜
800,000 which contains carboxylic acid alkyl ester and/or carboxylic acid alkyl amide and/or carboxylic acid alkyl amino alkyl ester on main chain or side chain.
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Abstract
The present invention relates to a film-forming agent which forms a film on the skin, and also to a preparation for percutaneous administration containing the film-forming agent and active ingredient. The transdermal preparation including the film-forming agent of the present invention and active ingredient exhibits excellent elasticity and flexibility, shows superior adhesion power when formed on the skin, and forms non-sticky film.
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Citations
19 Claims
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1. A film-forming agent characterized in comprising 50˜
- 99% by weight of the following polyurethane (A) and 1˜
50% by weight of the following addition polymerization polymer (B) having a functional group of carboxylic acid derivative;(A) Polyurethane with weight average molecular weight of 10,000˜
500,000, which is prepared by polymerization of the following ingredient (a-1), (a-2), and (a-3), and represented with the following formula 1;
(a-1) polyethylene glycol;
(a-2) polydiol with hydroxyl groups at both ends, which has stronger hydrophobicity than the said (a-1); and
(a-3) diisocyanate having isocyanate at both ends and (B) The addition polymerization polymer with a functional group of carboxylic acid derivative has weight average molecular weight of 10,000˜
800,000 which contains carboxylic acid alkyl ester and/or carboxylic acid alkyl amide and/or carboxylic acid alkyl amino alkyl ester on main chain or side chain.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
- 99% by weight of the following polyurethane (A) and 1˜
Specification