Plaster containing 4-biphenylacetic acid
AssigneeTeikoku Seiyaki Co., Ltd.
InventorsMitsuji Akazawa, Katsukyuki Inoo, Masahiro Yamaji
Life of this patent
Estimating the term…
Abstract
It is provided the plaster of anti-inflammatory and analgesic, improving the sustained releasing of 4-biphenylacetic acid from the base adhesive material and low skin irritation, by using more than two kinds of resolvent for 4-biphenylacetic acid having low solubility in solvents. More specifically, it is provided plasters essentially containing 5-50% by weight of styrene-isoprene-styrene block copolymer, 0.05-20% by weight of N-methyl-2-pyrrolidone, 0.1-20% by weight of polyethylene glycol and 0.1-20% by weight of 4-biphenylacetic acid.
Claims3
A plaster essentially containing 5-50% by weight of styrene-isoprene-styrene block copolymer, 0.05-20% by weight of N-methyl-2-pyrrolidone, 0.1-20% by weight of polyethylene glycol and 0.1-20% by weight of 4-biphenylacetic acid.
Dependencies are inferred from the claim text.