GB2123034A - Making flexible sheet by electrophoretic deposition - Google Patents
Making flexible sheet by electrophoretic deposition Download PDFInfo
- Publication number
- GB2123034A GB2123034A GB08219849A GB8219849A GB2123034A GB 2123034 A GB2123034 A GB 2123034A GB 08219849 A GB08219849 A GB 08219849A GB 8219849 A GB8219849 A GB 8219849A GB 2123034 A GB2123034 A GB 2123034A
- Authority
- GB
- United Kingdom
- Prior art keywords
- flexible sheet
- polymeric material
- coating
- electrophoresis
- support
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- 238000001652 electrophoretic deposition Methods 0.000 title description 3
- 239000000463 material Substances 0.000 claims abstract description 23
- 239000011248 coating agent Substances 0.000 claims abstract description 17
- 238000000576 coating method Methods 0.000 claims abstract description 17
- 238000001962 electrophoresis Methods 0.000 claims abstract description 14
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000007900 aqueous suspension Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 11
- 229920000058 polyacrylate Polymers 0.000 claims description 7
- 239000003822 epoxy resin Substances 0.000 claims description 5
- 229920000647 polyepoxide Polymers 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 229920001577 copolymer Polymers 0.000 claims description 2
- 229910052902 vermiculite Inorganic materials 0.000 abstract description 12
- 235000019354 vermiculite Nutrition 0.000 abstract description 12
- 239000010455 vermiculite Substances 0.000 abstract description 12
- 239000004816 latex Substances 0.000 abstract description 4
- 229920000126 latex Polymers 0.000 abstract description 4
- 229920000459 Nitrile rubber Polymers 0.000 abstract description 3
- NTXGQCSETZTARF-UHFFFAOYSA-N buta-1,3-diene;prop-2-enenitrile Chemical compound C=CC=C.C=CC#N NTXGQCSETZTARF-UHFFFAOYSA-N 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000002002 slurry Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- LEQAOMBKQFMDFZ-UHFFFAOYSA-N glyoxal Chemical compound O=CC=O LEQAOMBKQFMDFZ-UHFFFAOYSA-N 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 229940015043 glyoxal Drugs 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000005028 tinplate Substances 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D1/00—Electroforming
- C25D1/12—Electroforming by electrophoresis
Landscapes
- Chemical & Material Sciences (AREA)
- Electrochemistry (AREA)
- Molecular Biology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Sealing Material Composition (AREA)
- Paints Or Removers (AREA)
- Laminated Bodies (AREA)
Abstract
Flexible sheet material suitable for use as gasket-facing material is made by submitting to electrophoresis an aqueous suspension of an expanded layer silicate e.g. exfoliated vermiculite, which contains a dispersed organic polymeric material such as a butadiene-acrylonitrile copolymer latex, and stripping the coating of electrophoretically deposited material from the support on which it is formed. <IMAGE>
Description
SPECIFICATION
Method of making flexible sheet material
This invention relates to a method of making flexible sheet material, more particularly flexible sheet material having a content of exfoliated vermiculite or similar expanded layer silicate such as expanded hydrobiotite.
It is disclosed in British Patent Specification 1 593 383 that flexible sheet material composed substantially wholly of lamellae of exfoliated vermiculite adhering together by mutually attractive forces can be made by evaporating certain aqueous suspensions of exfoliated vermiculite while they are in contact with a shaped surface, or alternatively by removing water from the suspensions by absorption into an absorbent part of a shaped surface.
Electrophoretic methods of deposition of the lamellae from the suspension are disclosed as being advantageously used when rapid removal of water is required. After the bulk of the water has been removed by such methods, the vermiculite layer may be stripped from the surface against which it is shaped, or alternatively left in place as a non-combustible coating on the surface. The layer is affected by liquid water, by may be made water-resistant by an ion-exchange proCess after shaping.
- By the present invention we produce flexible sheet material having a content of exfoliated vermiculite or similar expanded layer silicate which has acceptable water-resistance without the use of an ion-exchange procedure.
According to the invention we produce flexible sheet material by submitting to electrophoresis an aqueous suspension of an expanded layer silicate which contains a dispersed organic polymeric material, to deposit on a support a layer or coating which contains from 5 to 90% by dry weight of said polymeric material, and then stripping the electrophoretically deposited coating from the support.
The flexible sheet material thus produced is, by virtue of its water-resistance, cohesiveness and sealing capacity, useful as gasket-facing material, and can be readily secured by conventional adhesives to apertured metal support plates of the type used in gasket manufacture.
Preferably the deposited coating contains not less than one-third by dry weight of layer silicate, and a content of 4080% by weight is particularly preferred.
Suitable polymeric materials are: natural rubber; acrylonitrile butadiene copolymers; polyacrylates; acrylonitrile-butadiene-styrene copolymers; and epoxy resins.
Electrophoresis will usually be carried out at a voltage gradient in the-range 0.05-3 volts/mm.
A preferred range is 0.25-2.5 volts/mm.
Electrophoresis in aqueous suspensions is often accompanied by electrolysis, and this can give rise to gas bubbles, in particular of oxygen, at an electrode (anode) constituted by a metal support. This is specially noticeable when the support is of stainless steel. To avoid this, and the possibility of forming a deposit that is flawed owing to the presence of trapped gas, it is desirable to employ a support whose surface at least is of a metal which suppresses oxygen evolution, preferably zinc, copper, aluminium or very pure iron.
A preferred thickness for the electrophoretically deposited coating is in the range 0.05-0.5 mm when dry.
After formation of the electrophoretic deposit the support is removed from the aqueous suspension employed for electrophoresis and rinsed with water. After any treatment which may be necessary in particular cases to impart green strength to the deposit, the deposit is stripped from the support. To facilitate stripping, the electrode (anode) employed in electrophoresis is preferably of metal that is highly polished.
The expanded layer silicate which is to be present in the electrophoresis medium is preferably an aqueous suspension of silicate which has been exfoliated chemically rather than thermally. Suitable suspensions may be prepared by the methods described in British Patent
Specifications 1 016 385, 119 305, 1 593 382 and 1 593 383.
The electrophoresis meduim can contain additional ingredients intended to form part of the coating, for example: pigments and dyes; and additional water-proofing agents such as glyoxal.
The invention is further illustrated by the
Examples herein and with reference to the accompanying drawing, which is a diagram showing an eiectrophoresis cell whose anode receives a deposit of material which is later stripped from the anode in the form of flexible sheet.
Example 1
a. A rectangular sheet (50x25 mm) was cut from a highly polished sheet 1 mm thick of pure zinc, and made the anode 1 in an electrophoresis cell 2 containing a slurry 3 made by mixing 90 parts by volume of a slurry of exfoliated vermiculite with 10 parts by volume of an acrylic polymer latex. The slurry of exfoliated vermiculite contains 6.5% by weight of vermiculite of particle size less than 50 ym, and had been prepared following generally the procedure of example 1(A) in British Patent Specification 1 593 382. The acrylic polymer latex was a commercially available material sold under the name Revacryl
A275 (an anionic emulsion, 45.5% solids content, of a self-linking acrylic polymer curable at 1 200C; pH4; particle size 0.2 yam).
The cathode 4 of the cell was of perforated tinplate.
The anode 1 had on the side remote from cathode 4, and on its edges, a coating 5 of polyurethane lacquer.
b. Electrophoresis was carried out for 2 minutes at a voltage gradient of 1 volt/mm to form an electrophoretic deposit 6 on the anode 1.
c. The anode 1 was then removed from the electrophoresis cell, rinsed with water, dried at 800C for 1 hour and then heated at 1 200C for 3 minutes to cure the acrylic polymer present in the coating deposited on it. The coating 6 was then stripped from the anode. The highly flexible sheet thus obtained was 0.1 mm thick and contains 35% by weight of acrylic polymer, the rest being exfoliated vermiculite.
Example 2
Following generally the procedure of Example 1 a coating 6 was formed by electrophoretic deposition from a slurry obtained by mixing 225 parts by weight of a slurry of exfoliated vermiculite with 100 parts by weight of the epoxy resin sold under the trademark Grilonit GE38 and 225 parts by weight of the corresponding hardener solution (25% solids content).
The anode was removed from the electrophoresis cell, rinsed with water and dried in a stream of air at ambient temperature until the coating 6 had developed enough green strength to allow it to be stripped from the anode. The film thus detached was then allowed to stand until cure of the epoxy resin component was complete.
The flexible sheet thus obtained contains 11% of epoxy resin.
Example 3
Following generally the procedure of Example
1 a coating 6 was formed by electrophoretic deposition from a slurry obtained by mixing 90 parts by volume of a slurry of exfoliated vermiculite with 10 parts by volume of a commercially available butadiene-acrylonitrile latex (solids content 41%; pH 10.3; particle size 0.13cm).
The flexible sheet obtained contained 81% by weight of butadiene-acrylonitrile copolymer.
Claims (6)
1. A method of making flexible sheet material comprising submitting to electrophoresis an aqueous suspension of an expanded layer silicate which contains a dispersed organic polymeric material, to deposit on a support a coating which contains 590% by dry weight of said polymeric material, and then stripping the electrophoreticaily deposited coating from the support.
2. A method according to claim 1, in which the deposited coating contains not less than one-third by dry weight of expanded layer silicate.
3. A method according to claim 2, in which the deposited coating contains 4080% by dry weight of expanded layer silicate.
4. A method according to any one of claims 1 to 3, in which the organic polymeric material is an acrylic polymer.
5. A method according to any one of claims 1 to 3, in which the organic polymeric material is an acrylonitrile-butadiene copolymer.
6. A method according to any one of claims 1 to 3, in which the organic polymeric material is of epoxy resin.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08219849A GB2123034B (en) | 1982-07-08 | 1982-07-08 | Making flexible sheet by electrophoretic deposition |
| DE19833324391 DE3324391A1 (en) | 1982-07-08 | 1983-07-06 | METHOD FOR PRODUCING FLEXIBLE SHEET MATERIAL |
| FR8311333A FR2529914B1 (en) | 1982-07-08 | 1983-07-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08219849A GB2123034B (en) | 1982-07-08 | 1982-07-08 | Making flexible sheet by electrophoretic deposition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2123034A true GB2123034A (en) | 1984-01-25 |
| GB2123034B GB2123034B (en) | 1985-11-13 |
Family
ID=10531556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08219849A Expired GB2123034B (en) | 1982-07-08 | 1982-07-08 | Making flexible sheet by electrophoretic deposition |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE3324391A1 (en) |
| FR (1) | FR2529914B1 (en) |
| GB (1) | GB2123034B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0505650A1 (en) * | 1991-03-26 | 1992-09-30 | Styrodecor Eurl | Decorative coating for walls and ceilings based on expanded polystyrene |
| WO1998053022A1 (en) * | 1997-05-21 | 1998-11-26 | Flexitallic Investments Incorporated | Gaskets |
| WO1998056861A1 (en) * | 1997-06-09 | 1998-12-17 | Herberts Gmbh | Aqueous coating composition of a polymer and exfoliated platelet filler |
| US6087016A (en) * | 1997-06-09 | 2000-07-11 | Inmat, Llc | Barrier coating of an elastomer and a dispersed layered filler in a liquid carrier |
| WO2000049094A1 (en) * | 1999-02-22 | 2000-08-24 | Ppg Industries Ohio, Inc. | Electrocoating compositions containing high aspect ratio clays as crater control agents |
| US6232389B1 (en) | 1997-06-09 | 2001-05-15 | Inmat, Llc | Barrier coating of an elastomer and a dispersed layered filler in a liquid carrier and coated articles |
| US7204492B2 (en) | 2000-01-14 | 2007-04-17 | Flexitallic Limited | Gaskets |
| US10920119B2 (en) | 2005-01-11 | 2021-02-16 | Flexitallic Investments Incorporated | Gasket material and its process of production |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6121360A (en) | 1997-02-13 | 2000-09-19 | Flexitallic Investments, Inc. | Gaskets |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1593383A (en) * | 1977-08-26 | 1981-07-15 | Ici Ltd | Production of vermiculite suspension |
| GB1593382A (en) * | 1976-09-23 | 1981-07-15 | Ici Ltd | Production of articles from minerals |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1007593B (en) * | 1954-11-04 | 1957-05-02 | Siemens Ag | Mica puelpe and process for the electrophoretic production of mica layers |
| DE1011696B (en) * | 1955-11-12 | 1957-07-04 | Siemens Ag | Process for the electrophoretic, continuous production of coherent webs from a puelpe of calcined mica |
| NL282114A (en) * | 1961-10-26 | |||
| US3567613A (en) * | 1968-05-10 | 1971-03-02 | Grace W R & Co | Method for flameproofing combustible materials |
-
1982
- 1982-07-08 GB GB08219849A patent/GB2123034B/en not_active Expired
-
1983
- 1983-07-06 DE DE19833324391 patent/DE3324391A1/en not_active Withdrawn
- 1983-07-07 FR FR8311333A patent/FR2529914B1/fr not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1593382A (en) * | 1976-09-23 | 1981-07-15 | Ici Ltd | Production of articles from minerals |
| GB1593383A (en) * | 1977-08-26 | 1981-07-15 | Ici Ltd | Production of vermiculite suspension |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0505650A1 (en) * | 1991-03-26 | 1992-09-30 | Styrodecor Eurl | Decorative coating for walls and ceilings based on expanded polystyrene |
| WO1998053022A1 (en) * | 1997-05-21 | 1998-11-26 | Flexitallic Investments Incorporated | Gaskets |
| US6610771B1 (en) | 1997-05-21 | 2003-08-26 | Flexitallic Investments, Inc. | Gaskets |
| EP1033394A3 (en) * | 1997-05-21 | 2008-06-25 | Flexitallic Investments, Inc. | Gaskets |
| EP1132447A3 (en) * | 1997-05-21 | 2008-12-10 | Flexitallic Investments, Inc. | Gaskets |
| WO1998056861A1 (en) * | 1997-06-09 | 1998-12-17 | Herberts Gmbh | Aqueous coating composition of a polymer and exfoliated platelet filler |
| US6087016A (en) * | 1997-06-09 | 2000-07-11 | Inmat, Llc | Barrier coating of an elastomer and a dispersed layered filler in a liquid carrier |
| US6232389B1 (en) | 1997-06-09 | 2001-05-15 | Inmat, Llc | Barrier coating of an elastomer and a dispersed layered filler in a liquid carrier and coated articles |
| WO2000049094A1 (en) * | 1999-02-22 | 2000-08-24 | Ppg Industries Ohio, Inc. | Electrocoating compositions containing high aspect ratio clays as crater control agents |
| US7204492B2 (en) | 2000-01-14 | 2007-04-17 | Flexitallic Limited | Gaskets |
| US8876118B2 (en) | 2000-01-14 | 2014-11-04 | Flexitallic Investments Inc. | Gaskets |
| US10920119B2 (en) | 2005-01-11 | 2021-02-16 | Flexitallic Investments Incorporated | Gasket material and its process of production |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3324391A1 (en) | 1984-01-12 |
| FR2529914B1 (en) | 1986-09-05 |
| FR2529914A1 (en) | 1984-01-13 |
| GB2123034B (en) | 1985-11-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19960708 |