Slowly releasing perfume compositions

• US 4,492,644 A
• Filed: 04/15/1982
• Issued: 01/08/1985
• Est. Priority Date: 04/15/1982
• Status: Expired due to Term

• Current Assignee: Soda Aromatic Co., Ltd. (Toray Industries Incorporated)
• Original Assignee: Soda Aromatic Co., Ltd. (Toray Industries Incorporated)
• Inventors: Matsumoto, Yuuichi, Ishitani, Masato, Kawasaki, Kiyomitsu
• Primary Examiner(s): Sutto, Anton H.
• Application Number:
  US06/368,520
• Time in Patent Office: 999 Days
• Field of Search: 252/521 A
• US Class Current: 512/4
• CPC Class Codes: A61K 2800/56 Compounds, absorbed onto or entrapped into a solid carrier, e.g. encapsulated perfumes, inclusion compounds, sustained release forms
• CPC Class Codes: A61K 8/0241 Containing particulates characterized by their shape and/or structure see also A61K8/04, A61K8/11, and A61K8/14, further aspects are classified in A61K2800/40 and subcodes
• CPC Class Codes: A61K 8/8135 Compositions of 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 an acyloxy radical of a saturated carboxylic acid, of carbonic acid or of a haloformic acid; Compositions of derivatives of such polymers, e.g. vinyl esters (polyvinylacetate)
• CPC Class Codes: A61L 9/042 with the help of a macromolecular compound as a carrier or diluent A61L9/048 takes precedence
• CPC Class Codes: A61Q 13/00 Formulations or additives for perfume preparations essential oils or perfumes per se C11B9/00

Abstract

A slowly releasing perfume composition is obtained by mixing a granulated ethylene-vinyl acetate copolymer and a perfume which contains hydrocarbons and/or esters as an essential fragrant component, at a temperature in the range of about 10° C. to about 50° C.

Claims

1. A slowly releasing perfume composition prepared by mixing a granulated ethylene-vinyl acetate copolymer having a vinyl acetate content in the range of 19 to 40% by weight and a perfume, said perfume containing as an essential component at least one fragrant component selected from the group consisting of hydrocarbons and esters the total amount of said hydrocarbons and esters in said perfume being not less than about 30%, at a temperature in the range of about 10°

C. to about 50°

C. to thereby allow said perfume to be absorbed in said granulated copolymer and wherein the diameter of each granule of said granulated copolymer is in the range of about 1 to about 10 mm.

2. The composition of claim 1 wherein said hydrocarbons are monoterpene hydrocarbons, sesquiterpene hydrocarbons, diterpene hydrocarbons and aromatic hydrocarbons.

3. The composition of claim 1 wherein said esters are aliphatic and aromatic carboxylic acid esters having not more than 20 carbon atoms.

4. The composition of claim 1 wherein said perfume is used in an equivalent amount or less based on the amount of said granulated copolymer and substantially all the amount thereof is absorbed in said granulated copolymer.