Delivery systems and methods of preparing the same

Patent metadata

Field	Value
Publication number	US-10993466-B2
Application number	US-201615568813-A
Country	US
Kind code	B2
Filing date	Apr 25, 2016
Priority date	Apr 24, 2015
Publication date	May 4, 2021
Grant date	May 4, 2021

Abstract

Methods of preparing a delivery system are described. Each method uses a first and second printing materials. The second printing material contains an active material such as a fragrance, flavor, malodor counteracting agent, and mixture thereof.

First claim

What is claimed is:

1. A method of preparing a delivery system, the method comprising:
(a) providing a first and second printing materials,
(b) depositing the first printing material, the second printing material, or both to form a first thin layer,
(c) repeating step (b) a predetermined number of times so that a new thin layer is formed on top of a previously formed thin layer and a solid or semisolid layer-by-layer construction is thus prepared, and
(d) curing the construction, thereby preparing a delivery system,
wherein each of the first and second printing materials contains a polymeric material having a melting point or glass transition point of 75 to 165° C., and the second printing material contains a fragranced polymer.

2. The method of claim 1 , wherein step (b) is repeated at least 5 times, each of the first and second printing materials is separately deposited via a printer head, the first printing material is deposited via a first printer head at a temperature of 100 to 300° C., and the second printing material is deposited via a second printer head at a temperature of 20 to 300° C.

3. A method of preparing a delivery system, the method comprising:
(a) providing a first and second printing materials,
(b) depositing the first printing material, the second printing material, or both to form a first thin layer,
(c) repeating step (b) a predetermined number of times so that a new thin layer is formed on top of a previously formed thin layer and a solid or semisolid layer-by-layer construction is thus prepared, and
(d) curing the construction, thereby preparing the delivery system,
wherein the first printing material contains a polymer having a melting point of 45° C. to 300° C., and the second printing material is a mixture of a fragranced polymer and polylactic acid at a ratio of 10:90 to 90:10.

4. The method of claim 1 , wherein the first printing material is porous or contains a water-dissoluble polymer.

5. The method of claim 1 , wherein the first printing material is polyvinyl alcohol, polylactic acid, or a combination thereof.

6. The method of claim 3 , wherein step (b) is repeated at least 5 times, each of the first and second printing materials is separately deposited via a printer head, the first printing material is deposited via a first printer head at a temperature of 100 to 300° C., and the second printing material is deposited via a second printer head at a temperature of 20 to 300° C.

7. The method of claim 3 , wherein the first printing material is porous or contains a water-dissoluble polymer.

8. The method of claim 3 , wherein the first printing material is polyvinyl alcohol, polylactic acid, or a combination thereof.

Assignees

• Int Flavors & Fragrances Inc

Inventors

• Popplewell Lewis Michael
• Pringgosusanto Franklin
• Henson Lulu

Classifications

• B33Y70/00

  Materials specially adapted for additive manufacturing · CPC title

• C08L91/06

  Waxes · CPC title

• C08L91/00

  Compositions of oils, fats or waxes; Compositions of derivatives thereof · CPC title

• A61K8/25

  Silicon; Compounds thereof · CPC title

• A61K8/8129

  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 alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers or esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers, e.g. polyvinylmethylether · CPC title