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WO2010025381A4 - Article formed from electrospinning a dispersion - Google Patents

Article formed from electrospinning a dispersion Download PDF

Info

Publication number
WO2010025381A4
WO2010025381A4 PCT/US2009/055386 US2009055386W WO2010025381A4 WO 2010025381 A4 WO2010025381 A4 WO 2010025381A4 US 2009055386 W US2009055386 W US 2009055386W WO 2010025381 A4 WO2010025381 A4 WO 2010025381A4
Authority
WO
WIPO (PCT)
Prior art keywords
dispersion
set forth
weight
parts
condensation curable
Prior art date
Application number
PCT/US2009/055386
Other languages
French (fr)
Other versions
WO2010025381A3 (en
WO2010025381A2 (en
Inventor
Randal M. Hill
Eric J. Joffre
Donald T. Liles
Bonnie J. Ludwig
Original Assignee
Dow Corning Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dow Corning Corporation filed Critical Dow Corning Corporation
Priority to CN2009801405233A priority Critical patent/CN102187022B/en
Priority to JP2011525240A priority patent/JP2012501390A/en
Priority to US13/061,232 priority patent/US20110165811A1/en
Priority to CA2735440A priority patent/CA2735440A1/en
Priority to MX2011002221A priority patent/MX2011002221A/en
Priority to EP20090792065 priority patent/EP2318575A2/en
Publication of WO2010025381A2 publication Critical patent/WO2010025381A2/en
Publication of WO2010025381A3 publication Critical patent/WO2010025381A3/en
Publication of WO2010025381A4 publication Critical patent/WO2010025381A4/en
Priority to IL211432A priority patent/IL211432A0/en

Links

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/0007—Electro-spinning
    • D01D5/0015—Electro-spinning characterised by the initial state of the material
    • D01D5/003—Electro-spinning characterised by the initial state of the material the material being a polymer solution or dispersion
    • D01D5/0038—Electro-spinning characterised by the initial state of the material the material being a polymer solution or dispersion the fibre formed by solvent evaporation, i.e. dry electro-spinning
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/38—Formation of filaments, threads, or the like during polymerisation
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
    • D01F6/60—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyamides
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
    • D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/681—Spun-bonded nonwoven fabric

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Nonwoven Fabrics (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Abstract

An article of fibers includes a cured compound. The fibers are formed from electrospinning a dispersion. The dispersion includes a liquid and a condensation curable compound. A content of the liquid in the dispersion is reduced such that the condensation curable compound cures. The article is formed from a method of manufacturing which includes the step of forming the dispersion. The method also includes the step of electro spinning the dispersion to reduce the content of the liquid such that the condensation curable compound cures.

Claims

AMENDED CLAIMS received by the International Bureau on
06 August 2010
(06 08 2010)
WHAT IS CLAIMED IS;
1. Λ method υf manufacturing an article comprising fibers formed from a di spersion, said method comprising the steps of; A. forming the dispersion comprising; (i) a liquid, and (ii) a condensation curable silicone rubber, and
B. ciectrospinniiig the dispersion to ieducc a content of the liquid such that the condensation curable silicone rubber cures via condensation.
2. A method as set forth in claim 1 wherein the dispersion further comprises a surfactant.
3. A method as set forth in claim 2 wherein the surfactant is combined with the liquid before the dispersion is formed.
4. A method as set forth in claim 2 wherein the surfactant is present in ihe dispersion in aj> amount of from 0,5 to 5 percent by weight baaed on a weight of the cσndensaiiou curable compound.
5. A method as set forth in claim 1 wherein the dispαsion further comprises a thickener.
6. λ method as sei forth in claim 5 whαein the thickener Js further defined a.s polyethylene oxide.
7. A method aβ set forth in claim 5 wherein The tliickencr is combined with the liquid before the dispersion is lormed.
8. A method as set forth in claim 5 wherein the thickener is present in the dispersion in an amount of from 0.05 to 5 percent by weight based on a weight of the dispersion.
13. A method as set forth in any one of claims 1-8 wherein the dispersion farther comprises a condensation curable organic compound.
14. A method as set forth in any one of claims 1-8 wherein the dispersion comprises from 20 to 80 parts by weight of the condensation curable silicone rubber per 100 parts by weight of the dispersion so long as a total amount of the dispersion does not exceed 100 parts by weight.
15. A method as set forth in claim 14 wherein the dispersion comprises from 20 to 80 parts by weight of the liquid per 100 parts by weight of the dispersion so long as a total amount of the dispersion does not exceed 100 parts by weight.
16. A method as set forth in any one of claims 1-8 wherein the liquid is further defined as water.
17. A method as set forth in claim 16 wherein the condensation curable silicone rubber is dispersed in the water.
18. A method as set forth in any one of claims 1-8 further comprising the step of drying the fibers to further reduce a content of the liquid such that the condensation curable silicone rubber cures.
19. A method as set forth in claim 1 wherein the dispersion comprises a dispersed phase comprising the condensation curable silicone rubber and a continuous phase comprising the liquid, a surfactant, and a thickener.
20. A method as set forth in any one of claims 1-8 wherein the fibers have a stress of at least 15 psi at break and a strain of at least 100 percent at break.
21. An article of fibers comprising a cured compound and formed from electrospinning a dispersion comprising:
A. a liquid; and
6. a condensation curable silicone rubber;
wherein a content of said liquid is reduced such that said condensation curable silicone rubber.
22. An article as set forth in claim 21 wherein said dispersion further comprises a surfactant.
23. An article as set forth in claim 22 wherein said surfactant is combined with said liquid before said dispersion is formed.
24. An article as set forth in claim 22 wherein said surfactant is present in said dispersion in an amount of from 0.5 to 5 percent by weight based on a weight of said condensation curable silicone rubber.
25. An article as set forth in claim 21 wherein said dispersion further comprises a thickener.
26. An article as set forth in claim 25 wherein said thickener is further defined as polyethylene oxide.
27. An article as set forth in claim 25 wherein said thickener is combined with said liquid before said dispersion is formed.
28. An article as set forth in claim 25 wherein said thickener is present in said dispersion in an amount of from 0.05 to 5 percent by weight based on a weight of said dispersion.
33. An article as set forth in any one of claims 21-28 wherein said dispersion further comprises a condensation curable organic compound.
34. An article as set forth in any of claims 21-28 wherein said dispersion comprises from 20 to 80 parts by weight of said condensation curable silicone rubber per 100 parts by weight of said dispersion so long as a total amount of said disper sion does not exceed 100 parts by weight.
35. An article as set forth in claim 34 wherein said disper sion comprises from 20 to 80 parts by weight of said liquid per 100 parts by weight of said dispersion so long as a total amount of said dispersion does not exceed 100 parts by weight.
36. An article as set forth in any one of claims 21-28 wherein said liquid is further defined as water.
37. An article as set forth in claim 21 wherein said dispersion comprises a dispersed phase comprising said condensation curable silicone r ubber and a continuous phase comprising said liquid, a surfactant, and a thickener.
38. An article as set forth in claim 37 wherein said condensation curable silicone rubber comprises a silicone elastomer present in an amount of from 20 to 80 parts by weight per 100 parts by weight of said dispersion, said liquid is further defined as water and is present in an amount of from 20 to 80 parts by weight per 100 parts by weight of the dispersion, said surfactant comprises methylaminomethylpropanol present in an amount of from 0.5 to 5 parts by weight per 100 parts by weight of said dispersion, said thickener is further defined as polyethylene oxide and is present in an amount of from 0.05 to 5 parts by weight per 100 parts by weight of said dispersion. 39. An article as set forth in any one of claims 21-28 that is further defined as a non- woven mat.
40. A method of manufacturing an article comprising fibers formed from a dispersion, said method comprising the steps of:
A. forming the dispersion comprising; (i) a liquid, and
(ii) a condensation curable silicone rubber,
8. electrospinning the dispersion to form the fibers; and C. curing the condensation curable silicone rubber.
41. A method as set forth in claim 40 wherein the dispersion further comprises a surfactant and a thickener.
42. A method as set forth in claim 41 wherein the surfactant is present in the dispersion in an amount of from 0.5 to 5 percent by weight based on a weight of the condensation curable silicone rubber.
43. A method as set forth in claim 41 wherein the thickener is further defined as polyethylene oxide.
44. A method as set forth in claim 41 wherein the thickener is present in the dispersion in an amount of from 0.05 to 5 percent by weight of the dispersion.
48. A method as set forth in any one of claims 40-44 wherein the dispersion comprises from 20 to 80 parts by weight of the liquid per 100 parts by weight of the dispersion so long as a total amount of the dispersion does not exceed 100 parts by weight.
49. A method as set forth in any one of claims 40-44 wherein the liquid is further defined as water.
50. A method as set forth in claim 49 wherein the condensation curable silicone rubber.
Claims 1, 21, and 40 are amended to include the limitations of claims 10 (and 30) and to clarify that the curable compound is a condensation curable silicone rubber, Claims 13, 14, 17- 19, 24, 33, 34, 37, 38, 42, and 50 are amended aceoidingly. Claim 20 is amended to clarify that "stress" and "strain" are measured "at break," as described in paragraph [0052J of the specification. Accordingly, no new matter is added.
Item TV of Written Opinion:
The Examiner rejects the application for lack of unity because claims 1 and 21 read on a first invention and claim 40 reads on a second invention The Examiner asserts that these inventions are focused on different curable compounds and require different timing for curing. As amended, claims 1, 21, and 40 each require a condensation curable silicone rubber which, as indicated by the Examiner, is bnth novel and involves an inventive step. The condensation curable silicone rubber links this group of inventions such that they form a single general inventive concept, For purposes of this single general inventive concept the timing of curing of the condensation curable compound is immaterial. It does nut cause claim 40 to fall outside of the single concept or εupport a lack of unity rejection. Accordingly, the Applicant respectfully asserts, that this rejection should be withdrawn.
Item V of Written Opinion:
Relative to (Dl)- (D7), none of these references disclose, teach, or suggest all of the claimed features of the amended claims. The Examiner clearly indicates that both claims 10 and 30, which each focus on a condensation curable silicone rubber, are novel and include an inventive step, Amended claims 1, 21, and 40 incorporate this limitation. For this reason, the Applicant submits that amended claims 1, 21, and 40, and all claims which depend therefrom, are also novel mid involve on inventive step. item VlH of Written Opinion:
lhe Examiner rejects claims 1 for being unclear relative to the ideality of the ourable compound and timing υf the curing step, The specification and claims (prior to amendment) ieferred to embodiments wherein the curable compound is condensation curable and other embodiments wherein k i_. not However, as amended, all claims require a condensation ourable silicone robber. Moreover, the specification makes ΪL clear that the condensation curable silicone rubber can cure during or after clectrospinniπg ui can begin to cure during electrospinning and continue to cure after. Accordingly, claim 1, read rmtii independently from, and in conjunction with, the specification and other claims, is clear.
The Examiner also rejecis claim 20 for being unclear for failing to identify when "stress" and "strain" are measured. Accordingly, claim 20 is amended to clarify that "stress" ami "strain" are measured "at break." Thus, the aforementioned rejections should be withdrawn.
The Applicant submits that the claims arc all linked to funn a single general inventive concept, are clear and unambiguous, and arc both novel and involve an inventive step. Fmthcr and favorable reconsideration of the subject application is hereby requested.
PCT/US2009/055386 2008-08-29 2009-08-28 Article formed from electrospinning a dispersion WO2010025381A2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
CN2009801405233A CN102187022B (en) 2008-08-29 2009-08-28 Article formed from electrospinning dispersion
JP2011525240A JP2012501390A (en) 2008-08-29 2009-08-28 Articles formed from electrospinning of dispersions
US13/061,232 US20110165811A1 (en) 2008-08-29 2009-08-28 Article Formed From Electrospinning A Dispersion
CA2735440A CA2735440A1 (en) 2008-08-29 2009-08-28 Article formed from electrospinning a dispersion
MX2011002221A MX2011002221A (en) 2008-08-29 2009-08-28 Article formed from electrospinning a dispersion.
EP20090792065 EP2318575A2 (en) 2008-08-29 2009-08-28 Article formed from electrospinning a dispersion
IL211432A IL211432A0 (en) 2008-08-29 2011-02-27 Article formed from electrospinning a dispersion

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US9297908P 2008-08-29 2008-08-29
US61/092,979 2008-08-29

Publications (3)

Publication Number Publication Date
WO2010025381A2 WO2010025381A2 (en) 2010-03-04
WO2010025381A3 WO2010025381A3 (en) 2010-07-22
WO2010025381A4 true WO2010025381A4 (en) 2010-09-23

Family

ID=41631762

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2009/055386 WO2010025381A2 (en) 2008-08-29 2009-08-28 Article formed from electrospinning a dispersion

Country Status (10)

Country Link
US (1) US20110165811A1 (en)
EP (1) EP2318575A2 (en)
JP (1) JP2012501390A (en)
KR (1) KR20110058827A (en)
CN (1) CN102187022B (en)
CA (1) CA2735440A1 (en)
IL (1) IL211432A0 (en)
MX (1) MX2011002221A (en)
TW (1) TW201016909A (en)
WO (1) WO2010025381A2 (en)

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Also Published As

Publication number Publication date
JP2012501390A (en) 2012-01-19
CN102187022B (en) 2013-10-23
IL211432A0 (en) 2011-05-31
US20110165811A1 (en) 2011-07-07
WO2010025381A3 (en) 2010-07-22
WO2010025381A2 (en) 2010-03-04
MX2011002221A (en) 2011-08-03
KR20110058827A (en) 2011-06-01
CA2735440A1 (en) 2010-03-04
CN102187022A (en) 2011-09-14
TW201016909A (en) 2010-05-01
EP2318575A2 (en) 2011-05-11

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