WATER INSOLUBLE POLYMERIC WEB STRUCTURES AND FILAMENTS CONTAINING ENCAPSULATED COMPONENTS

• US 3,755,064 A
• Filed: 05/25/1971
• Issued: 08/28/1973
• Est. Priority Date: 08/11/1967
• Status: Expired due to Term

• Current Assignee: Eurand America Incorporated
• Original Assignee: Theodore Maierson
• Inventors: Maierson, Theodore
• Primary Examiner(s): Leavitt, Alfred L.
• Assistant Examiner(s): Dawson, Robert A.
• Application Number:
  US05/146,804
• Time in Patent Office: 826 Days
• Field of Search: 71/3,64A,64E 161/87,150,172,174,DIG.5 252/305,316 260/37NP,37P
• US Class Current: 428/338
• CPC Class Codes: A01G 2013/004 Liquid mulch
• CPC Class Codes: A01M 1/145 Attracting and catching insects using combined illumination or colours and adhesive surfaces
• CPC Class Codes: A01N 25/10 Macromolecular compounds
• CPC Class Codes: D01D 5/11 Flash-spinning
• CPC Class Codes: D01F 1/04 Pigments
• CPC Class Codes: D01F 1/10 Other agents for modifying properties
• CPC Class Codes: D01F 6/04 from polyolefins
• CPC Class Codes: D04H 3/16 with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion
• CPC Class Codes: Y10S 428/903 Microfiber, less than 100 micron diameter
• CPC Class Codes: Y10S 428/905 Odor releasing material
• CPC Class Codes: Y10T 428/268 Monolayer with structurally defined element
• CPC Class Codes: Y10T 428/2927 including structurally defined particulate matter
• CPC Class Codes: Y10T 428/2964 Artificial fiber or filament
• CPC Class Codes: Y10T 428/2984 Microcapsule with fluid core [includes liposome]
• CPC Class Codes: Y10T 428/2989 Microcapsule with solid core [includes liposome]

Abstract

The present disclosure is directed to formation of selfsupporting, three dimensional, water-insoluble, polymeric web structures containing encapsulated components. The webs are composed of randomly associated joined monofilaments of waterinsoluble polymers, said monofilaments ranging in average diameter from about 1 to 10 microns, usually from about 2 to 7 microns, on/or in which are located encapsulated components, e.g., coloring agents, perfumes, or other scents, e.g. insect sex attractants, agricultural chemicals, insecticides, pesticides, etc. Any water-insoluble web-forming polymer, including compatible polymer mixtures, can be used provided that said polymers are capable of having a self-supporting web structure, the randomly associated individual monofilaments of which are self-supporting when spanning a gap of at least 1 inch. The webforming polymer solutions or dispersions can be dispensed from various types of dispensing systems and equipment, e.g., from spray guns, portable aerosol cans, etc., to provide a novel and advantageous way of dispensing agrictultural treating agents or other encapsulated materials onto plants or other desired repositories or locations without interfering therewith, viz., with plant growth or metabolic processes thereof. cesses thereof. According to a preferred embodiment, the disclosure is also directed to aerosolizable formulations comprised of the polymer (or polymers) forming the web structure, a solvent (or mixture of solvents) used to dissolve the polymer, a propellent (or mixture of propellents) to propel the polymer solution from the aerosol dispensing device, and the encapsulated material which becomes imbedded in or adherent to the polymeric filaments upon formation of the web. Other optional ingredients, e.g., a plasticizer(s) can be included in the aerosolizable formulations to impart increased tackiness to the web over extended time periods.

Claims

2. A self-supporting monofilament according to claim 1 wherein said elastomer is hydrocarbon elastomer.

3. A self-supporting monofilament according to claim 1 wherein said encapsulated component comprises agricultural treating agent.

4. A self-supporting monofilament according to claim 1 wherein said encapsulated component comprises colorless dye prossessing latent color.

5. A water-soluble, self-supporting, three-dimensional elastomer-compatible resin web of randomly associated, joined monofilaments ranging in average diameter from about 1 to 10 microns, said monofilaments being self-supporting over a span of at least one inCh and said monofilament containing encapsulated component present as individual capsules having diameters ranging from 1 to 100 microns.

6. A web according to claim 5 wherein said elastomer-compatible resin contains a tackifying plasticizer.

7. A web according to claim 5 which contains encapsulated component present as individual capsules having diameters ranging from 1 to 100 microns.

8. A web according to claim 5 wherein said elastomer is hydrocarbon elastomer.

9. A web according to claim 5 wherein said encapsulated component comprises agricultural treating agent.

10. A web according to claim 5 wherein said encapsulated component comprises colorless dye possessing latent color.