Polymeric compositions for sustained release of volatile materials

Patent metadata

Field	Value
Publication number	US-2015141319-A1
Application number	US-201414571566-A
Country	US
Kind code	A1
Filing date	Dec 16, 2014
Priority date	Dec 7, 2005
Publication date	May 21, 2015
Grant date	—

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

1 . A homogeneous 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 at least another monomer comprising at least a heteroatom
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,
d) a volatile material.

2 . A polymeric composition according to claim 1 wherein the monomer comprising at least a heteroatom comprises a carbonyl group.

3 . A polymeric composition according to claim 2 wherein the monomer comprising at least a heteroatom comprises an ester group.

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

5 . A polymeric composition according to claim 1 wherein the copolymer is an ethylene-vinylacetate copolymer.

6 . A polymeric composition according to claim 1 wherein the copolymer is from 5% to 75%, preferably from 10% to 50% by weight of the polymeric composition, the tackifier is from 10% to 60%, preferably from 15% to 40% by weight of the copolymer and the volatile material is more than 10%, preferably more than 20%, more preferably more than 30% of the total weight of the composition.

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

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

9 . A polymeric composition according to claim 1 wherein the volatile material is a perfume.

10 . A polymeric composition according to claim 9 wherein the perfume comprises an aldehyde, a ketone, an alcohol, a terpene or an ester.

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

12 . A polymeric composition according to claim 1 wherein the tackifier is selected from rosin and its derivatives which are solid at room temperature.

13 . 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

• C11B9/0061

  compounds containing a six-membered aromatic ring not condensed with another ring · CPC title

• C09J131/04 Primary

  Homopolymers or copolymers of vinyl acetate · CPC title

• C09J2201/61

  Chemistry & Metallurgy · mapped topic

• C09J123/0853

  Vinylacetate · CPC title