WO2009046725A1 - Procédé de fabrication d'un article et article surmoulé - Google Patents
Procédé de fabrication d'un article et article surmoulé Download PDFInfo
- Publication number
- WO2009046725A1 WO2009046725A1 PCT/DK2008/050246 DK2008050246W WO2009046725A1 WO 2009046725 A1 WO2009046725 A1 WO 2009046725A1 DK 2008050246 W DK2008050246 W DK 2008050246W WO 2009046725 A1 WO2009046725 A1 WO 2009046725A1
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- WIPO (PCT)
- Prior art keywords
- item
- substrate
- producing
- elastomer
- plasma
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 90
- 239000000758 substrate Substances 0.000 claims abstract description 142
- 229920001971 elastomer Polymers 0.000 claims abstract description 118
- 239000000806 elastomer Substances 0.000 claims abstract description 107
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 9
- 229920002379 silicone rubber Polymers 0.000 claims description 45
- 239000000178 monomer Substances 0.000 claims description 44
- 239000007789 gas Substances 0.000 claims description 31
- 239000000203 mixture Substances 0.000 claims description 29
- 238000000151 deposition Methods 0.000 claims description 26
- 230000008021 deposition Effects 0.000 claims description 24
- 230000001590 oxidative effect Effects 0.000 claims description 19
- 238000006243 chemical reaction Methods 0.000 claims description 17
- 239000011521 glass Substances 0.000 claims description 17
- -1 polyethylene Polymers 0.000 claims description 15
- 238000002203 pretreatment Methods 0.000 claims description 14
- 239000004945 silicone rubber Substances 0.000 claims description 14
- 125000004429 atom Chemical group 0.000 claims description 12
- 239000005060 rubber Substances 0.000 claims description 11
- 239000000835 fiber Substances 0.000 claims description 10
- 239000004952 Polyamide Substances 0.000 claims description 9
- 229920002647 polyamide Polymers 0.000 claims description 9
- 229920000642 polymer Polymers 0.000 claims description 9
- 150000001875 compounds Chemical class 0.000 claims description 7
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 7
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 7
- LFQCEHFDDXELDD-UHFFFAOYSA-N tetramethyl orthosilicate Chemical compound CO[Si](OC)(OC)OC LFQCEHFDDXELDD-UHFFFAOYSA-N 0.000 claims description 7
- 229920000459 Nitrile rubber Polymers 0.000 claims description 6
- 229910010293 ceramic material Inorganic materials 0.000 claims description 6
- 229920003049 isoprene rubber Polymers 0.000 claims description 6
- 239000004417 polycarbonate Substances 0.000 claims description 6
- 229920000515 polycarbonate Polymers 0.000 claims description 6
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 5
- 230000004913 activation Effects 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 5
- 239000011261 inert gas Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229920002943 EPDM rubber Polymers 0.000 claims description 4
- 244000043261 Hevea brasiliensis Species 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 239000004698 Polyethylene Substances 0.000 claims description 4
- 239000004743 Polypropylene Substances 0.000 claims description 4
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 4
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 229920005560 fluorosilicone rubber Polymers 0.000 claims description 4
- UQEAIHBTYFGYIE-UHFFFAOYSA-N hexamethyldisiloxane Chemical compound C[Si](C)(C)O[Si](C)(C)C UQEAIHBTYFGYIE-UHFFFAOYSA-N 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 229920003052 natural elastomer Polymers 0.000 claims description 4
- 229920001194 natural rubber Polymers 0.000 claims description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 4
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 4
- 229920000573 polyethylene Polymers 0.000 claims description 4
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 4
- 229920001155 polypropylene Polymers 0.000 claims description 4
- 230000009467 reduction Effects 0.000 claims description 4
- 229920002631 room-temperature vulcanizate silicone Polymers 0.000 claims description 4
- 229910000077 silane Inorganic materials 0.000 claims description 4
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 4
- 229920002554 vinyl polymer Polymers 0.000 claims description 4
- 239000002253 acid Chemical group 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 3
- 150000001336 alkenes Chemical class 0.000 claims description 3
- 229910052743 krypton Inorganic materials 0.000 claims description 3
- DNNSSWSSYDEUBZ-UHFFFAOYSA-N krypton atom Chemical compound [Kr] DNNSSWSSYDEUBZ-UHFFFAOYSA-N 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- OQMIRQSWHKCKNJ-UHFFFAOYSA-N 1,1-difluoroethene;1,1,2,3,3,3-hexafluoroprop-1-ene Chemical compound FC(F)=C.FC(F)=C(F)C(F)(F)F OQMIRQSWHKCKNJ-UHFFFAOYSA-N 0.000 claims description 2
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 claims description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical class N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 2
- 241000531908 Aramides Species 0.000 claims description 2
- 239000004215 Carbon black (E152) Substances 0.000 claims description 2
- 206010010144 Completed suicide Diseases 0.000 claims description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 2
- 239000004793 Polystyrene Substances 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 238000007259 addition reaction Methods 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 150000001298 alcohols Chemical class 0.000 claims description 2
- 150000001335 aliphatic alkanes Chemical class 0.000 claims description 2
- 150000001337 aliphatic alkines Chemical class 0.000 claims description 2
- 125000000217 alkyl group Chemical group 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- 150000001412 amines Chemical class 0.000 claims description 2
- 229920003235 aromatic polyamide Polymers 0.000 claims description 2
- 239000012298 atmosphere Substances 0.000 claims description 2
- 230000001680 brushing effect Effects 0.000 claims description 2
- 238000003490 calendering Methods 0.000 claims description 2
- 125000004432 carbon atom Chemical group C* 0.000 claims description 2
- 238000006555 catalytic reaction Methods 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims description 2
- 238000000748 compression moulding Methods 0.000 claims description 2
- 238000006482 condensation reaction Methods 0.000 claims description 2
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 claims description 2
- 238000007598 dipping method Methods 0.000 claims description 2
- 150000002148 esters Chemical group 0.000 claims description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 2
- 238000001125 extrusion Methods 0.000 claims description 2
- 229920001973 fluoroelastomer Polymers 0.000 claims description 2
- 229920002313 fluoropolymer Polymers 0.000 claims description 2
- 239000004811 fluoropolymer Substances 0.000 claims description 2
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 claims description 2
- 229930195733 hydrocarbon Natural products 0.000 claims description 2
- 150000002430 hydrocarbons Chemical class 0.000 claims description 2
- 238000001746 injection moulding Methods 0.000 claims description 2
- 229910010272 inorganic material Inorganic materials 0.000 claims description 2
- 239000011147 inorganic material Substances 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 238000010030 laminating Methods 0.000 claims description 2
- 239000011777 magnesium Substances 0.000 claims description 2
- 229910052749 magnesium Inorganic materials 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims description 2
- 150000001247 metal acetylides Chemical class 0.000 claims description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 2
- 150000004767 nitrides Chemical class 0.000 claims description 2
- 150000002825 nitriles Chemical class 0.000 claims description 2
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 2
- 150000002978 peroxides Chemical class 0.000 claims description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 2
- 229910052697 platinum Inorganic materials 0.000 claims description 2
- 229920000058 polyacrylate Polymers 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 238000007639 printing Methods 0.000 claims description 2
- 229910052703 rhodium Inorganic materials 0.000 claims description 2
- 239000010948 rhodium Substances 0.000 claims description 2
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims description 2
- 238000007493 shaping process Methods 0.000 claims description 2
- 150000004756 silanes Chemical class 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 2
- 238000003856 thermoforming Methods 0.000 claims description 2
- 238000001721 transfer moulding Methods 0.000 claims description 2
- CPUDPFPXCZDNGI-UHFFFAOYSA-N triethoxy(methyl)silane Chemical compound CCO[Si](C)(OCC)OCC CPUDPFPXCZDNGI-UHFFFAOYSA-N 0.000 claims description 2
- RKIJUBHVSHUCFW-UHFFFAOYSA-N [He].[Ne].[Ar] Chemical compound [He].[Ne].[Ar] RKIJUBHVSHUCFW-UHFFFAOYSA-N 0.000 claims 1
- POPACFLNWGUDSR-UHFFFAOYSA-N methoxy(trimethyl)silane Chemical compound CO[Si](C)(C)C POPACFLNWGUDSR-UHFFFAOYSA-N 0.000 claims 1
- JCVQKRGIASEUKR-UHFFFAOYSA-N triethoxy(phenyl)silane Chemical compound CCO[Si](OCC)(OCC)C1=CC=CC=C1 JCVQKRGIASEUKR-UHFFFAOYSA-N 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 9
- 239000010410 layer Substances 0.000 description 72
- 238000009832 plasma treatment Methods 0.000 description 10
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 3
- 238000001994 activation Methods 0.000 description 3
- 239000007822 coupling agent Substances 0.000 description 3
- 239000002243 precursor Substances 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229920004482 WACKER® Polymers 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000007385 chemical modification Methods 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 229910052754 neon Inorganic materials 0.000 description 2
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000005240 physical vapour deposition Methods 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000007704 wet chemistry method Methods 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 101000801643 Homo sapiens Retinal-specific phospholipid-transporting ATPase ABCA4 Proteins 0.000 description 1
- 102100033617 Retinal-specific phospholipid-transporting ATPase ABCA4 Human genes 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000002318 adhesion promoter Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- HTDJPCNNEPUOOQ-UHFFFAOYSA-N hexamethylcyclotrisiloxane Chemical compound C[Si]1(C)O[Si](C)(C)O[Si](C)(C)O1 HTDJPCNNEPUOOQ-UHFFFAOYSA-N 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 150000001282 organosilanes Chemical class 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000000678 plasma activation Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- SCPYDCQAZCOKTP-UHFFFAOYSA-N silanol Chemical compound [SiH3]O SCPYDCQAZCOKTP-UHFFFAOYSA-N 0.000 description 1
- 150000003377 silicon compounds Chemical class 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B25/08—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/12—Layered products comprising a layer of natural or synthetic rubber comprising natural rubber
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/14—Layered products comprising a layer of natural or synthetic rubber comprising synthetic rubber copolymers
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/02—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition
- C23C18/12—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material
- C23C18/1204—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material inorganic material, e.g. non-oxide and non-metallic such as sulfides, nitrides based compounds
- C23C18/1208—Oxides, e.g. ceramics
Definitions
- the present invention relates to a method of producing an item comprising an elastomer, such as silicone rubber applied onto a substrate and an item.
- a primer comprising an organic chemical compound onto the substrate surface (e.g. a silane, titanium or zirconium coupling agents).
- the chemical compound has two types of functional groups, one type that is able to bond to the substrate and one type that is able to bond to the elastomer b) Surface activation by physical vapour deposition, chemical vapour deposition, plasma activation often followed by applying a primer c) Chemical modification of the elastomer (self-bonding compounds) that is able to bond directly to the substrate surface.
- US 5,378,535 describes a primer system for silicone elastomers bonded to glass or plastic substrates.
- the primer system is a two-layer system consisting of a first thin layer of a silica-based adhesion promoter which is applied to the substrate using PVD, CVD, evaporation or sputtering, and a second layer of an organosilane comprising silanol, and (ii) polymerizable alkene and/or silicon hydride functional groups applied by wet chemical methods.
- the second layer may be from 0.1 to about 5 microns in thickness, it will in practice be impossibly to apply a layer with a thickness below 1 micron
- EP 781 823 relates to a primer composition comprising an organic silicon compound.
- the primer composition can be used to prime a substrate for promoting adhesion of silicone rubber to the substrate.
- US 6,034,174 relates to a primer composition for incorporating into an addition curable polysiloxane resin and comprising an epoxy functional silane and an acid.
- the addition curable polysiloxane resin is self-adhesive when cured on top of a substrate.
- Other compositions of addition curable silicone compositions are disclosed in US 6,489,031 and US 5,085,894.
- the object of the invention is to provide a novel method of producing an item comprising a substrate and an elastomer, which method is simple and provides an item with a strong bonding between the substrate and the elastomer.
- Another object of the invention is to provide a novel item comprises an elastomer and a substrate which are bonded to each other with a strong bonding.
- overmolding means herein to apply an elastomer or a precursor therefore to a substrate and cure the elastomer in contact with the substrate to bond the elastomer to the substrate.
- overmolded elastomer means an elastomer, which has been applied to a substrate e.g. in the form of a precursor, and cured in contact with said substrate.
- overmolded item means the item comprising the overmolded elastomer and the substrate.
- the method of the invention comprises
- the substrate and the elastomer forms a very strong and durable bonding to each other, even when the materials differs in hardness and/or stiffness. Furthermore the method is simple and fast and may be used on most any substrate.
- the method of the invention has thus opened up for the production of completely new quality products, in particular products mainly composed of an elastomer and a non-elastomer.
- the elastomer is overmolded onto the primer treated substrate.
- the elastomer is overmolded onto the primer treated substrate and simultaneously at least partly into at least a part of the substrate, e.g. such as into a surface layer of the substrate where the surface layer e.g. have a thickness of 1 ⁇ m to 10 mm, such as 10 ⁇ m to 5 mm.
- the thickness of the surface layer of the substrate depends largely of the porosity of the substrate.
- the substrate is at least partly porous, e.g. in the form of a porous polymer or in the form of a woven or a non-woven fabric, and the method comprises overmolding the elastomer into at least a part of said substrate.
- the overmolding of the elastomer into the substrate may e.g. include incorporating precursor(s) for the elastomer into the substrate using overpressure and/or liquid/supercritical CO 2 treatment as described in any one of applicants copending applications US 2006/0148985, DK PA 2006 01439 and DK PA 2006 01440 followed by cross-linking (curing) to provide the elastomer.
- the substrate may in principle be any kind of substrate of any material and with any shape.
- the substrate may be of a single material or it may be composed of two or more materials which may be composed in a homogenous fashion or an inhomogeneous fashion.
- the substrate is of a material which is harder than the overmolded elastomer.
- the substrate should preferably be a solid substrate at 20 0 C and 1 atms.
- the substrate is a non-elastomer.
- the substrate is a polymer or a combination of different polymers.
- preferred polymers includes polymers selected from the group consisting polyethylene (PE) polypropylene (PP), polycarbonate (PC), polyamide (PA), poly(phenylene sulphide) (PPS), polymethylmethacrylate (PMMA), polystyrene (PS), polyethyleneterephthalate (PET), and fluoropolymers.
- the substrate is one or more of carbon and aramide, preferably in the form of fibers or particles, such as fibers with an average diameter of 1 -100 ⁇ m and/or fibers/particles with a BET surface area of from 100 to 1500 m 2 /g.
- Fibers comprising an overmolded elastomer may be used e.g. as fillers, in yarns and in other fiber based products.
- the substrate is as mentioned above a porous material.
- the substrate is a non woven fabric made of polymer fibres.
- the elastomer may e.g. be applied in order to be impregnated into an outer layer of the fabric to provide membrane or barrier properties. Thereby a very strong membrane with pre-selected characteristics can be obtained.
- the substrate is glass or a glass composition.
- An overmolded item comprising glass and an elastomer may be constructed to have a unique combination of desired properties, such as a combination of strength, low permeability and relatively low hardness.
- the substrate is a metal, such as iron, steel (stainless, duplex and other), aluminium and magnesium.
- the elastomer may e.g. be applied in order to protect the metal against corrosion, to provide en electrically insulation or for other reasons.
- the substrate is a ceramic material, such as oxide based ceramic materials, (alumina, zirconia), non-oxide based ceramic materials, (carbides, borides, nitrides, suicides).
- oxide based ceramic materials alumina, zirconia
- non-oxide based ceramic materials alumina, zirconia
- carbides, borides, nitrides, suicides a ceramic material, such as oxide based ceramic materials, (alumina, zirconia), non-oxide based ceramic materials, (carbides, borides, nitrides, suicides).
- the substrate is a composite of two or more of the above mentioned materials.
- the substrate may have essentially plane surfaces or it may have a more curved shape.
- the substrate may be in the form of particles and/or fibers irrespectively of the material e.g. fibers with an average diameter of 1 -100 ⁇ m and/or fibers/particles with a BET surface area of 100 to 1500 m 2 /g.
- the fibre substrate may e.g. be of glass.
- the substrate is a film, having an essentially even thickness, preferably of 2 mm or less, such as 1 mm or less, such as 0.5 mm or less, such as 0.1 mm or less, such as 0.05 mm or less.
- the substrate is a non-porous film.
- the substrate has at least one thickness larger than 0.5 mm, the item preferably has a non-plane surface section, such as a curved and/or edged surface section.
- the substrate is essentially nonflexible, and preferably has an inherent stiffness of at least 100, such as between 103 and 1010 N/m, such as between 104 and 106 N/m.
- the inherent stiffness may e.g. be measured using ASTM D 882.
- the method of the invention comprises applying one or more primer layers where the total thickness of the primer layer(s) is up to 200 nm. It has been found that even thinner layer(s) of primer provide an even better result. It is therefore preferred that the total thickness of the at least one primer layer being in the interval between 1 and 150 nm, such as between 5 and 100 nm, such as between 10 and 70 nm.
- the primer layer' in the following it should be interpreted to mean at least one primer layer and the term may though be interpreted to include one, two or several primer layers provided that the total thickness is not above 200 nm.
- the primer layer should as mentioned be rather thin, namely about 200 nm or less in thickness.
- the inventors of the present invention has thus found that by providing the primer layer as a rather thin layer a very strong bonding between the overmolded elastomer and the substrate can be obtained.
- the primer layer is applied using vapour deposition.
- a preferred method of applying the primer layer is by using plasma deposition of at least one monomer, the plasma preferably being a low (lower than atmosphere) pressure AC (alternating current) or DC (direct current) plasma, wherein the pressure in the plasma during deposition treatment preferably being is 50 Pa or below, below 35 Pa, such as between 1 and 30 Pa.
- the primer layer being applied using plasma deposition.
- any kind of plasma generating method may be used, but in order not to damage the substrate surface and/or the primer it is desired to use a relatively low power plasma.
- the plasma being a low power plasma, preferably the applied power being 100 W/l plasma reactor or less, such as 50 W/l plasma reactor or less, such as 30 W/l plasma reactor or less, such as 20 W/l plasma reactor or less, such as 10 W/l plasma reactor or even less, such as 5 W/l plasma reactor or less, such as 3 W/l or less, such as 1 W/l or even less.
- the volume of the plasma reactor is the volume in which the plasma is generated.
- the primer layer being applied using plasma deposition where the plasma being a one phase plasma (one electrode or electrode group having same voltage and one grounded electrode/electrode group) preferably operating at a frequency of 50 Hz to 15 MHz, such as to 13.6 MHz.
- the plasma being a one phase plasma (one electrode or electrode group having same voltage and one grounded electrode/electrode group) preferably operating at a frequency of 50 Hz to 15 MHz, such as to 13.6 MHz.
- the primer layer being applied using plasma deposition where the plasma being a two or multi phase plasma (two or more electrode or electrode groups each group having same voltage) preferably operating at a frequency of 50 Hz to 15 MHz, such as to 13.6 MHz.
- the plasma deposition may preferably be performed at atmospheric pressure or a reduced pressure.
- the plasma deposition is performed at a low pressure, such as a pressure of 100 Pa or below, such as 50 Pa or below, such as 15 Pa or below.
- the primer layer being applied using plasma deposition and the plasma deposition comprising applying the substrate in a plasma reactor, reducing the pressure in the plasma reactor, feeding the at least one monomer to the plasma reactor preferably together with a support gas selected from the group consisting of inert gases, oxidizing gasses or reducing gasses, the support gas preferably being selected from the group consisting of N2O, Ar, 02, H2, N2 and mixtures thereof.
- the monomer or monomers in the form of gas may preferably feed into the reaction chamber in an amount of between 0.1 and 10 ml/min/l plasma reactor.
- the deposition may e.g. be performed at any temperature but it is preferred that the deposition in the plasma reactor is performed at room temperature or at elevated temperature, more preferably at 15 - 100 °C.
- the time for deposition depends largely on the deposition condition and the concentration of monomers. As example a deposition time of least 1 to 120 minutes may be used. Normally the deposition time will be 5-40 minutes
- the at least one monomer being selected such that the deposited layer being essentially inorganic.
- the deposited layer being essentially inorganic.
- the at least one monomer being selected such that the deposited layer being organic.
- the deposited layer being organic.
- the one or more monomer(s) may preferably be selected in dependence on the type of substrate and the type of elastomer and its chemical curing (cross linking) reaction.
- the at least one monomer comprises a Si containing monomer, preferably selected from the group consisting of silanes and/or organosilicon compositions such as hexamethyldisiloxane, methoxythmethylsilane, tetramethoxysilane, hexamethylcyclotrisiloxane, methyltriethoxysilane, or phenylthethoxysilane.
- Si containing monomer preferably selected from the group consisting of silanes and/or organosilicon compositions such as hexamethyldisiloxane, methoxythmethylsilane, tetramethoxysilane, hexamethylcyclotrisiloxane, methyltriethoxysilane, or phenylthethoxysilane.
- the one or more monomers comprising at least one monomer selected from silane, hexamethyldisiloxane, tetramethyoxysilane, tetraethoxysilane, the monomer being fed into the reaction chamber together with an oxidating composition such as O 2 .
- the plasma deposition comprises, feeding the at least one monomer to the plasma reactor together with a support gas.
- the support gas may preferably comprise an inert gas component and/or an oxidizing gas component.
- the inert gas may in principle be any kind of gas, but for economically and safety reasons Ar gas is preferred.
- Other useful inert gasses include helium, neon and krypton.
- the oxidizing gas component may preferably be O 2 or N 2 O.
- the monomer(s) may preferably be selected to form a glass layer in the form of an oxide network including Si atoms.
- the Si based glass layer is provided using the method of applying a glass-barrier layer as described in WO07062665.
- O 2 being fed to the reaction chamber in a molar ratio monomer: O 2 of from 20:1 to 1 :20, such as from 10:1 to 1 :10, such as from 5:1 to 1 :5, such as from 2:1 to 1 :2, such as about 1 :1.
- Ar being fed to the reaction chamber in a molar ratio monomer: Ar of from 10:1 to 1 :10, such as from 5:1 to1 :5, such as from 3:1 to 1 :3, such as from 2:1 to 1 :2, such as about 1 :1.
- the one or more monomers comprising at least one monomer selected from hexamethylsiloxane, tetramethoxysilane and tetraethoxysilane.
- the primer layer may be essentially homogenous or its composition may vary.
- the method of the invention comprises applying a graduated primer layer, the method comprising feeding at least two monomers in amounts which are varied relative to each other during the deposition treatment.
- the method of the invention comprises applying one single primer layer only.
- This single primer layer may be essentially homogenous or its composition may vary gradually along the thickness of the primer layer.
- the method of the invention comprises applying two or more primer layers.
- Each of these two or more primer layers may be essentially homogenous or its composition may vary gradually along the thickness of the primer layer.
- At least one of the primer layers is a glass layer in the form of an oxide network including Si atoms, preferably all primer layers are in the form of glass layers comprising an oxide network including Si atoms.
- the method may preferably comprise comprising applying alternating Si-oxide network and Si-C-oxide network layers, wherein the layers independently of each other optionally comprise up to 50 % by atom mol of the respective layer composition of carbon.
- a second primer layer onto the first primer layer comprising feeding one or more of the monomers selected from the group of alkanes, alkenes, alkines, alcohols, amines, ammonia compounds with vinyl and/or allyl groups, compounds with ester and/or acid groups and compounds with flouro groups.
- the two or more primer layers being applied immediately after each other in same plasma treating process.
- the substrate or at least the surface segment of the substrate may preferably be subjected to a pre-treatment e.g. for cleaning the surface and/or for activating the surface.
- the method comprising pre-treating the surface segment of the substrate using plasma treatment prior to applying the primer layer.
- the plasma pre-treatment may preferably comprise subjecting the surface segment of the substrate to an oxidizing gas in the absence of monomer.
- the oxidizing gas in the pre-treatment may preferably comprise one or more oxidizing components selected from the group consisting of O 2 , N 2 O and mixtures thereof.
- the oxidizing gas comprises one or more oxidizing components in combination with one or more inert gasses selected from the group consisting of argon, helium, neon and krypton.
- the pre-treatment comprises cleaning and or activation of the surface segment in a reduction gas plasma (e.g. using H 2 gas), optionally followed by a pre-treatment comprising subjecting the surface segment of the substrate to an oxidizing gas.
- the pre-treatment comprises cleaning and or activation of the surface segment in a reduction gas plasma (e.g. using H 2 gas), optionally followed by applying a primer layer.
- a reduction gas plasma e.g. using H 2 gas
- the surface segment of the substrate may be all of the substrate or one or more parts of the substrate surface.
- the surface segment may additionally be subjected to a post-treatment i.e. a treatment performed onto the applied primer layer but prior to applying the elastomer.
- the post-treatment may preferably be a plasma treatment e.g. a plasma treatment with an oxidizing component in a plasma in the absence of monomer.
- the oxidizing component may preferably be oxygen, N 2 O or CO 2 .
- the post-treatment may e.g. be performed for up to 15 minutes, preferably between 0.5 and 5 minutes, such as between 1 and 3 minutes.
- the method comprises overmolding an elastomer onto at least a part of the treated surface segment of the substrate.
- the overmolding may preferably comprise applying the elastomer in non-cured or partly-cured condition onto the substrate and curing the elastomer.
- the overmolding may in one embodiment comprise applying the substrate and the elastomer in a mould simultaneously or one after the other, followed by curing the elastomer preferably under pressure.
- the elastomer may be applied to the substrate in partly-cured condition.
- the obtained bonding between substrate and elastomer has shown to be very strong even when only the final curing is performed when the elastomer is in contact with the substrate.
- the overmolding comprises applying the elastomer onto at least a part of the substrate surface, by spraying, brushing, dipping, printing, laminating or rolling, followed by curing the elastomer.
- the overmolding comprises shaping and partly curing the elastomer, and applying the substrate in contact with the elastomer and allowing the elastomer to proceed curing.
- the substrate and the partly cured elastomer is pressed together.
- the pressure need not be maintained during the final curing process but it is desired that the pressure is maintained at least for 10 seconds, such as at least 20 seconds, such as at least 1 minutes.
- the pressure may be applied manually or by machine.
- the method comprises applying a pressure to hold together the substrate and the partly cures elastomer, the pressure preferably being at least 1 N per m 2 substrate segment, such as at least 5 N per m 2 substrate segment, such as at least 10 N per m 2 substrate segment.
- the overmolding comprises - melting and applying the elastomer to the substrate by one or more of the methods pressing, extrusion, injection moulding, thermoforming, thermo moulding, calendaring, rotation moulding, compression moulding and transfer moulding and allowing the elastomer to cure.
- the elastomer may be cured using any method e.g. using conventional heat and/or electromagnetic waves such as IR, micro wave, UV and combinations thereof.
- the elastomer should prior to application onto the substrate be capable of curing.
- the elastomer is a rubber.
- Preferred rubbers includes rubbers selected from silicone rubber, fluoro elastomer rubber (e.g. based on hexafluoropropylene vinylidene fluoride), and acrylonitrile-butadiene rubber (NBR), polyacrylate rubber, hydrated NBR, styrene-butadiene-rubber (SBR), natural rubber (NR), ethylene-propylene-diene-rubber (EPDM), Isoprene- rubber (IR), polyester-urethane and polyether-urethane.
- silicone rubber e.g. based on hexafluoropropylene vinylidene fluoride
- NBR acrylonitrile-butadiene rubber
- SBR styrene-butadiene-rubber
- NR natural rubber
- EPDM ethylene-propylene-diene-rubber
- IR Isoprene- rubber
- the rubber is silicone rubber, such as silicone rubber selected from liquid silicone elastomers (LSR), RTV- 1 silicone rubbers, RTV-2 silicone elastomers and HTV silicone elastomers, the silicone rubber preferably being selected from functionalized silicone rubbers such as fluoro silicone rubbers and self adhesive silicone rubbers.
- LSR liquid silicone elastomers
- RTV- 1 silicone rubbers RTV- 1 silicone rubbers
- RTV-2 silicone elastomers and HTV silicone elastomers
- the silicone rubber preferably being selected from functionalized silicone rubbers such as fluoro silicone rubbers and self adhesive silicone rubbers.
- the elastomer is silicone rubber comprising one or more of the silicone components selected from the group consisting of dialkylsilicone elastomers wherein alkyl means hydrocarbon side groups of 1 -12 carbon atoms such as methyl, ethyl, hexyl, and octyl; vinyl silicone elastomers; phenyl silicone elastomers; nitrile silicone elastomers; fluorosilicone elastomers, room temperature vulcanising (RTV) silicone elastomers; liquid silicone elastomers (LSR); borosilicone elastomers, and dimethyl silicone elastomers.
- dialkylsilicone elastomers wherein alkyl means hydrocarbon side groups of 1 -12 carbon atoms such as methyl, ethyl, hexyl, and octyl
- vinyl silicone elastomers phenyl silicone elastomers
- the silicone rubber may preferably be cross-linked using a method selected from the group of condensation reaction, addition reaction, peroxide assisted reaction, platinum catalyzed, rhodium catalyzed reaction and mixtures thereof.
- the invention also relates an item obtainable using the method as described above.
- the invention further relates to an overmolded item comprising a substrate and an elastomer bonded to each other and with an interface layer having a composition which is not merely a mixture of the composition of the substrate and the elastomer, wherein said interface layer has a thickness of 200 nm or less measured using SEM (Scanning electron microscope).
- the substrate and the elastomer may be as described above.
- the primer layer(s) may be obtainable by the method and using the materials as described above.
- the interface layer has a thickness of 150 nm or less, such as a thickness 100 nm or less, such as a thickness of 50 nm or less.
- the interface layer has a glasslike structure
- the interface layer preferably comprises an oxide network of Si and optionally other atom(s).
- the bonding between the substrate and the elastomer is stronger than the intrinsic strength of at least one of the substrate and the elastomer.
- the plasma treatment was made in an equipment with a reaction chamber volume of around 290 L, and supplied with a 50 Hz power supplier.
- Plasma treatment parameters Monomer: (Tetramethoxysilane)
- the obtained primer layer is not pure inorganic, but contains some organic parts.
- the treated substrates as well as 4 corresponding samples which were not treated by plasma (free of primer) were overmolded with an elastomer.
- the elastomer was applied manually onto the substrate by an applicator to obtain a thickness of about 1 mm. Then the elastomer was covered by a PTFE and slightly pressed (about 200 g) and applied in a heating chamber where the elastomer was cured 5 min at 150°C.
- the plasma treatment was made in equipment with a reaction chamber volume around 30 L, and a power supplier (Tantec) of 1 kW (30k Hz).
- TMOS Tetramethoxysilane
- the plasma treatment was initiated by applying a soft organic primer layer (silicon like coating) and by changing the energy and increasing the oxygen feeding, the primer layer becomes gradually more and more inorganic (glass coating). At the end the post treating will remove the organic part and make the surface pure inorganic glass coating.
- a soft organic primer layer silicon like coating
- inorganic glass coating
- the treated substrates as well as 4 corresponding samples which were not treated by plasma (free of primer) were overmolded with an elastomer.
- the elastomers were applied manually onto the respective substrates, LSR was covered with PTFE foil, slightly pressed (20Og) and applied in a heating chamber where the elastomer was cured 5 min at 150°C. RTV was applied in a thin layer on the substrate and cured 24 h at room temperature. Elastomers: 2K LSR from Wacker, and RTV silicone Dow corning 738 and 3140).
- PC Polycarbonate
- PET Polyethylene terephthalate
- the plasma treatment was made in an equipment with a reaction chamber volume around 12 L, and power supplier (3 fazes) 50 Hz.
- Plasma treatment parameters Monomer: Acrylnitrile (AN) from Aldrich
- the obtained primer layer is pure organic.
- the treated substrates as well as 4 corresponding samples which were not treated by plasma (free of primer) were overmolded with an elastomer.
- the elastomer was applied manually onto the substrate and pressed together with 1000 N at 130 ° C for 2 min.
- Elastomer TPU like silicone from Wacker.
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Abstract
L'invention porte sur un procédé de fabrication d'un article comprenant les opérations consistant à se procurer un substrat, à traiter au moins une section de surface dudit substrat par application d'au moins une couche de primaire, l'épaisseur totale de la ou des couches de primaire allant jusqu'à 200 nm; et à surmouler un élastomère sur et/ou dans le substrat traité par le primaire. L'article produit selon l'invention comprend une liaison interfaciale très forte entre le substrat et la couche surmoulée. Le substrat et l'élastomère forment une liaison très forte et durable de l'une avec l'autre, même lorsque les matières diffèrent quant à la dureté et/ou la rigidité. Le procédé peut être utilisé avec de la silicone en tant qu'élastomère surmoulé.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DKPA200701476 | 2007-10-12 | ||
DKPA200701476 | 2007-10-12 |
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WO2009046725A1 true WO2009046725A1 (fr) | 2009-04-16 |
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PCT/DK2008/050246 WO2009046725A1 (fr) | 2007-10-12 | 2008-10-06 | Procédé de fabrication d'un article et article surmoulé |
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WO (1) | WO2009046725A1 (fr) |
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