Polymeric compositions for sustained release of volatile materials

Patent metadata

Field	Value
Publication number	US-9512339-B2
Application number	US-201414571566-A
Country	US
Kind code	B2
Filing date	Dec 16, 2014
Priority date	Dec 7, 2005
Publication date	Dec 6, 2016
Grant date	Dec 6, 2016

Abstract

A polymeric composition comprising a copolymer of ethylene with at least another monomer comprising at least a heteroatom, a tackifier, less than 10% of a compatible plasticizer or blend of plasticizers and a volatile material. The compositions are able to deliver effectively the volatile material incorporated for a long time and also have good adhesion properties on most substrates.

First claim

What is claimed is:

1. A homogenous polymeric hot melt adhesive composition having a melting point of about 60° C. to about 80° C. and comprising:
a) a copolymer of ethylene with vinyl acetate,
b) a tackifier, wherein the tackifier is not an aliphatic hydrocarbon,
c) up to 10% by weight of the total weight of the composition of a compatible plasticizer or blend of plasticizers, and
d) a volatile material, wherein the volatile material is a perfume.

2. A polymeric composition according to claim 1 wherein the tackifier comprises an ester group.

3. A polymeric composition according to claim 1 wherein the copolymer is from 5% to 75% by weight of the polymeric composition, the tackifier is from 10% to 60% by weight of the copolymer and the volatile material is more than 10% of the total weight of the composition.

4. A polymeric composition according to claim 1 not comprising a compatible plasticizer.

5. A polymeric composition according to claim 1 , wherein the volatile material is less than 90% of the total weight of the composition.

6. A polymeric composition according to claim 1 wherein the perfume comprises an aldehyde, a ketone, an alcohol, a terpene or an ester.

7. A polymeric composition according to claim 1 wherein the tackifier has a Tg higher than 50° C.

8. A polymeric composition according to claim 1 wherein the tackifier is a rosin which is solid at room temperature.

9. A process for the manufacturing of a closed container comprising the steps of applying a polymeric composition according to claim 1 onto a portion of its internal surface.

Assignees

• Procter & Gamble

Inventors

• Macbeath Calum
• Corzani Italo
• Mimassi Lamia Delphine

Classifications

• C08K5/0008 Primary

  Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59 · CPC title

• C08K2201/007

  Fragrance additive · CPC title

• C08L23/0853

  Ethylene vinyl acetate copolymers · CPC title

• C08L23/02

  not modified by chemical after-treatment · CPC title

• C08L93/02

  Shellac (French polish C09F) · CPC title