EP2349756A1 - Objets présentant au moins une ouverture recouverte d'une membrane et leur procédé de production - Google Patents

Objets présentant au moins une ouverture recouverte d'une membrane et leur procédé de production

Info

Publication number
EP2349756A1
EP2349756A1 EP09783868A EP09783868A EP2349756A1 EP 2349756 A1 EP2349756 A1 EP 2349756A1 EP 09783868 A EP09783868 A EP 09783868A EP 09783868 A EP09783868 A EP 09783868A EP 2349756 A1 EP2349756 A1 EP 2349756A1
Authority
EP
European Patent Office
Prior art keywords
polyurethane
layer
membrane
present
article according
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.)
Withdrawn
Application number
EP09783868A
Other languages
German (de)
English (en)
Inventor
Carl Jokisch
Jürgen WEISER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Priority to EP09783868A priority Critical patent/EP2349756A1/fr
Publication of EP2349756A1 publication Critical patent/EP2349756A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02—Ducting arrangements
    • F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
    • F24F13/068—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser formed as perforated walls, ceilings or floors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/34—Nozzles; Air-diffusers
    • B60H1/3407—Nozzles; Air-diffusers providing an air stream in a fixed direction, e.g. using a grid or porous panel
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24273—Structurally defined web or sheet [e.g., overall dimension, etc.] including aperture
    • Y10T428/24322—Composite web or sheet
    • Y10T428/24331—Composite web or sheet including nonapertured component

Definitions

  • the present invention relates to an article having at least one opening through which an air stream is passed, characterized in that the respective opening is covered on the visible side with a visually appealing air-permeable or breathable membrane, which passes through the gas stream, the membrane at least two layers one of which comprises at least one polyurethane and is provided with a pattern.
  • the present invention relates to a process for the preparation of articles according to the invention.
  • Articles according to the invention may comprise any materials, for example wood, stone, concrete, glass, metal, plastic, in particular thermoplastics and thermosets.
  • the article according to the invention is a component of a vehicle.
  • the object according to the invention is preferably a molded part, for example a cable.
  • trucks, buses and passenger cars in particular to call.
  • articles of the invention are selected from internal parts of buildings, in particular walls and wall coverings.
  • the subject matter comprises an air conditioner, heater or blower.
  • the type of air conditioning, heating or fan is irrelevant.
  • the at least one opening may be openings of any size and shape. Suitable are circular, rectangular, trapezoidal, formed as a parallelogram, rhombic and slot-shaped openings, but also elliptical or irregularly shaped openings.
  • the diameter can be arbitrary, preferably it is in the range of 1 mm to 10 cm.
  • the air flow is directed, permanently or preferably temporarily.
  • the air flow can not be tempered or preferably tempered, for example, it can be hot air or cooled air.
  • the air stream may contain moisture or one or more perfumes.
  • the air flow is dried air.
  • At least one opening of article according to the invention is covered on the visible side with a visually appealing air-permeable or breathable membrane.
  • the opening or the openings are so with the membrane that it is not seen as an opening - viewed from the visible side.
  • the membrane is partially or preferably completely placed over the opening (s), so that the respective opening as such is at least partially, but preferably completely, removed from the observer's eye.
  • the membrane may preferably be connected to the article according to the invention by fastening techniques, in particular by gluing, needling or stapling, very particularly preferably by gluing.
  • the subject has a plurality of openings through which an air stream is passed, and at least one or preferably all of these openings are covered with a visually appealing, breathable or breathable membrane.
  • the article according to the invention has a plurality of openings through which an air stream is passed, and at least one or more openings are covered with a visually appealing, breathable or breathable membrane, but at least one opening is not.
  • the visible side of the article according to the invention is understood to mean the side which the viewer usually sees when the article according to the invention is used as intended.
  • Visually appealing may be a patterned or non-patterned, colored or non-colored surface.
  • the surface of objects according to the invention also contains logos, name or lettering.
  • the membrane has a leather-like appearance on its visible side, preferably the appearance of a scar leather or a nubuck leather.
  • the membrane on its visible side on a pleasant feel for example, a leather, in particular a Nubukleders.
  • the membrane is breathable, ie air permeable and / or water vapor permeable. This is to be understood as meaning that the water vapor permeability of the membrane is above 1.5 mg / cm 2 -h, measured in accordance with DIN 53333.
  • the water vapor permeability measurement is carried out with an air permeability measuring system of the type APMS / D120R-1 from IMAK GmbH, Ingolstadt.
  • a substrate for example a dressed leather, is clamped between two pressure chambers. Both chambers are subjected to an overpressure.
  • To Bleeding the one chamber measures the time the system takes to equilibrate within certain pressure ranges.
  • Articles of the invention require e.g. less than 60 seconds to compensate for a pressure difference of 0.5 bar to 0.01 bar with a sample diameter of 120 mm. Only 10 seconds are preferred, especially 1 second.
  • the membrane comprises at least two layers, at least one of which comprises a polyurethane and is patterned.
  • this layer is also referred to as “polyurethane layer” for short.
  • the polyurethane layer has an average thickness in the range from 15 to 300 ⁇ m, preferably from 20 to 150 ⁇ m, particularly preferably from 25 to 80 ⁇ m.
  • the membrane of article according to the invention comprises two different polyurethanes: polyurethane (PU 1) and polyurethane (PU 2), of which polyurethane (PU 1) is a so-called soft polyurethane and at least one hard polyurethane (PU 2) , Hard and soft polyurethanes are described below.
  • the membrane may comprise, for example, two, three or four layers. Due to the additional layers, the air permeability or respiratory activity must not be impaired so much that the air flow can no longer pass through the membrane.
  • the membrane as one of the layers comprises at least one carrier material.
  • the carrier material or the carrier materials are permeable to air or breathable, the layer of polyurethane may completely or partially cover the carrier material or the carrier materials. It is also conceivable that in the event that the membrane comprises at least two carrier materials, the polyurethane layer at some points carrier material 1 and at other locations carrier material 2 covered.
  • the carrier material or materials are selected independently of each other from leather, split leather, artificial leather, leather fibers (Lefa, "bonded leather"), cellulosic materials such as paper, furthermore textile and open-cell foams.
  • Textile can have different appearances. For example, fabrics, felt, knits (knitwear), knitted fabrics, wadding, scrim and microfiber weave are suitable, as well as nonwovens. Textile can be chosen from linen, cords, ropes, yarns or threads. Textile may be of natural origin, for example cotton, wool or flax, or synthetic, for example polyamide, polyester, modified polyester, polyester blends, polyamide blends, polyacrylonitrile, triacetate, acetate, polycarbonate, polyolefins such as polyethylene and polypropylene, polyvinylchloride, furthermore polyester microfibers and glass fiber fabrics.
  • polyesters such as, for example, polyethylene and polypropylene
  • polyolefins such as, for example, polyethylene and polypropylene
  • blended fabrics selected from cotton-polyester blended fabrics, polyolefin-polyester blended fabrics and polyolefin-cotton blend fabrics.
  • Textile is preferably nonwoven fabrics, woven fabrics, knitted or knitted fabrics.
  • Textile may be untreated or treated, for example bleached or dyed.
  • textile is coated or uncoated on one side only.
  • Textile can be equipped, in particular textile can be easy to clean and / or flameproof.
  • Textile may have a basis weight in the range of 10 to 500 g / m 2 , preferably 50 to 300 g / cm 2 .
  • Cellulose-containing material may be different types of cellulosic materials.
  • the term cellulose also includes hemicellulose and lignocellulose.
  • Cellulose-containing material may preferably be cardboard, cardboard, pulp or, in particular, paper.
  • Paper in the sense of the present application may be uncoated or preferably coated or equipped according to methods known per se. In particular, paper may be bleached paper. Paper may contain one or more pigments, for example chalk, kaolin or TiO 2, and paper, paperboard or cardboard may be uncoloured (natural) or colored. Paper, cardboard and cardboard for the purposes of the present applications can be unprinted or printed.
  • paper is kraft paper.
  • paper may be paper treated with polyacrylate dispersion.
  • leather in the context of the present invention includes tanned animal skins that can be dressed or preferably not trimmed. Tanning can be carried out by various methods, for example with chrome tanning agents, other mineral tanning agents such as aluminum compounds or zirconium compounds, with polymer tanning agents, for example homopolymers or copolymers of (meth) acrylic acid, with aldehydes, in particular with glutaric dialdehyde, with synthetic tanning agents such as condensation products of aromatic sulfonic acids with aldehydes, in particular with formaldehyde, or with other compounds containing carbonyl groups, for example condensation products of aromatic sulfonic acids with urea.
  • Other suitable leathers are those tanned with vegetable tannins and / or enzymatically tanned. Also, leathers tanned with a mixture of two or more of the aforementioned tanning agents are suitable.
  • leather within the meaning of the present invention may furthermore have undergone one or more of the work steps known per se, for example hydrophobing, fats, retanning and dyeing.
  • leather may be made from skins of cattle, pigs, goats, sheep, fish, snakes, wild animals or birds.
  • Leather may have a thickness in the range of 0.2 to 2 mm. Preferably, it is grain leather. Leather may be free of rawhide flaws, but even leather that has rawhide defects, such as those caused by barbed wire injuries, animal fighting or insect bites, is suitable.
  • leather is split or split leather.
  • leather is suede or split suede.
  • the support is artificial leather.
  • synthetic leathers also include precursors for synthetic leather, specifically those in which the uppermost layer, that is to say one or the outer layer, is missing.
  • artificial leather is plastic-coated, preferably textile fabrics with or without a cover layer, the cover layer, if present, having a leather-like appearance.
  • cover layer if present, having a leather-like appearance.
  • artificial leather are fabric synthetic leather, fleece artificial leather, fiber artificial leather, foil artificial leather and foamed artificial leather.
  • products with two outer layers such as non-woven artificial leather fall under the term artificial leather.
  • Particularly preferred artificial leather are breathable synthetic leather Polyurethane-based, as described, for example, in Harro T syndromebel, New Materials Permeable to Water Vapor, Springer Verlag 1999. Further preferred are support materials in which an open-cell polyurethane foam is applied to a textile support, for example as a blow-up foam or by direct back-foaming.
  • open-cell foams are polyurethanes and aminoplast foams, in particular melamine foams.
  • open-celled means that at least 50% of all lamellae are open in the relevant foams, preferably 60 to 100% and particularly preferably 65 to 99.9%, determined in accordance with DIN ISO 4590.
  • the air permeability or breathability of the polyurethane layer of the membrane largely or substantially based on pores that extend over the entire thickness of the polyurethane layer.
  • the pores may be formed, for example, as capillaries.
  • the polyurethane layer has on average at least 100, preferably at least 250 capillaries per 100 cm 2 .
  • the capillaries have an average diameter in the range of 0.005 to 0.05 mm, preferably 0.009 to 0.03 mm.
  • the capillaries are evenly distributed over the polyurethane layer. In a preferred embodiment of the present invention, however, the capillaries are distributed unevenly across the polyurethane layer.
  • the capillaries are substantially bent. In another embodiment of the present invention, the capillaries have a substantially straight course.
  • the capillaries impart air and water vapor permeability to the polyurethane layer without the need for perforation.
  • the polyurethane layer and the carrier material are linked to one another by at least one connecting layer which connects the entire surface or only partially polyurethane layer and carrier material, for example glued.
  • the bonding layer must not impair the air permeability or breathability.
  • the bonding layer can be a perforated layer, that is not a full-surface layer, preferably a hardened organic adhesive.
  • the bonding layer is a layer in the form of dots, stripes or lattices, for example in the form of diamonds, rectangles, squares or a honeycomb structure. Then polyurethane layer comes into contact with the carrier material at the gaps of the connecting layer.
  • At least one bonding layer is a layer of a cured organic adhesive, for example based on polyvinyl acetate, polyacrylate or, in particular, polyurethane, preferably on polyurethanes with a glass transition temperature below 0 ° C.
  • the curing of the organic adhesive may be effected, for example, thermally, by actinic radiation or by aging.
  • At least one tie layer is an adhesive net.
  • the bonding layer has a maximum thickness of 100 .mu.m, preferably 50 .mu.m, more preferably 30 .mu.m, most preferably 15 .mu.m.
  • the tie layer may contain hollow microspheres.
  • hollow microspheres are spherical particles having a mean diameter in the range from 5 to 20 ⁇ m of polymeric material, in particular halogenated polymer such as polyvinyl chloride or polyvinylidene chloride or copolymer of vinyl chloride with vinylidene chloride.
  • Hollow microspheres may be empty or preferably filled with a substance whose boiling point is slightly lower than the room temperature, for example with n-butane and especially with isobutane.
  • the polyurethane layer may be bonded to the substrate via at least two tie layers having the same or different composition.
  • one connecting layer may contain one pigment and the other connecting layer may be pigment-free.
  • one connecting layer may contain hollow microspheres and the other connecting layer may not.
  • the polyurethane layer is bonded to the substrate without a tie layer.
  • the pattern is formed on the polyurethane layer by a coating process, in particular by a reverse coating process.
  • the pattern is formed on the polyurethane layer by means of a die.
  • a die For example, it is possible to proceed by producing, for example by molding, a female mold with a negative variant of the desired pattern, applying thereto a preferably aqueous dispersion or emulsion of polyurethane, removing the water, preferably evaporating it, and then applying the polyurethane film thus formed Carrier material connects.
  • the membrane is obtained with the desired pattern.
  • the pattern of the polyurethane layer corresponds to the pattern of a leather or a wood surface. In one embodiment of the present invention, the pattern may reflect a nubuck leather.
  • the polyurethane layer has a velvet-like appearance.
  • the pattern may correspond to a velvet surface, for example with hairs having an average length of 20 to 500 ⁇ m, preferably 30 to 200 ⁇ m and particularly preferably 60 to 100 ⁇ m.
  • the hairs may, for example, have a circular diameter.
  • the hairs have a conical shape.
  • the polyurethane layer in one embodiment of the present invention, the polyurethane layer
  • Hair on which are arranged at an average distance of 50 to 350, preferably 100 to 250 microns to each other.
  • the data on the average thickness refer to the polyurethane layer without the hairs.
  • Another object of the present invention is a process for the preparation of articles according to the invention, also referred to in the context of the present invention as a manufacturing method according to the invention.
  • the production method according to the invention comprises the following steps:
  • At least one bonding layer is applied to the membrane and / or the backing material for fixing in step (b).
  • a polyurethane layer is formed by means of a matrix, at least one organic adhesive is applied over the entire surface or partially to the support material and / or the polyurethane layer, and then the polyurethane layer with carrier material is punctiform, strip-like or planar combines.
  • a porous membrane fixed on a carrier material is produced by a coating process by firstly applying a polyurethane film, at least one carrier material or the polyurethane film or both partially on one surface, for example in a pattern, with organic adhesive and then bring the two surfaces into contact with each other. Then you can still press the system so available together or thermally treated or pressed together with heating.
  • a polyurethane layer is prepared on a die and then brought into direct contact with a carrier material. For example, you can inject polyurethane layer directly with a soft foam or knife a whipped foam.
  • the polyurethane film forms the later polyurethane layer of the membrane.
  • the polyurethane film can be prepared as follows.
  • aqueous polyurethane dispersion is applied to a die which has been preheated, the water is allowed to evaporate and then the resulting polyurethane film is transferred to the relevant support material.
  • the application of aqueous polyurethane dispersion on the die can be carried out by methods known per se, in particular by spraying, for example with a spray gun.
  • the matrix may have a pattern, also called structuring, which is produced for example by laser engraving or by molding.
  • a die which has an elastomeric layer or a layer composite comprising an elastomeric layer on a support, wherein the elastomeric layer comprises a binder and optionally further additives and auxiliaries.
  • the provision of a template may then include the following steps:
  • a support for example a metal plate or a metal cylinder.
  • the procedure is to apply a liquid silicone to a pattern that ages and thus hardens silicone and then peels it off.
  • the silicone film is then glued on an aluminum carrier.
  • a die which has a laser-engravable layer or a layer composite comprising a laser-engravable layer on a support, wherein the laser-engravable layer comprises a binder and optionally further additives and auxiliaries.
  • the laser-engravable layer is also preferably elastomeric.
  • the provision of a template comprises the following steps:
  • thermochemical, photochemical or actinic amplification of the laser-engravable layer 3) engraving a surface structure corresponding to the surface structure of the surface-structured coating into the laser-engravable layer with a laser.
  • the laser-engravable layer which is preferably elastomeric, or the layer composite can be present on a support, preferably they are present on a support.
  • suitable supports include polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), polyethylene, polypropylene, polyamide or polycarbonate fabrics and films, preferably PET or PEN films.
  • a carrier papers and knitted fabrics such as cellulose.
  • suitable for sleeves are glass fiber fabrics or composite materials made of glass fibers and polymeric materials.
  • metallic carriers such as, for example, solid or tissue-shaped, flat or cylindrical carriers made of aluminum, steel, magnetizable spring steel or other iron alloys.
  • the support may be coated with an adhesive layer for better adhesion of the laser-engravable layer. In another embodiment of the present invention, no adhesive layer is required.
  • the laser-engravable layer comprises at least one binder, which may be a prepolymer, which reacts to a polymer in the course of a thermochemical reinforcement.
  • Suitable binders can be selected depending on the desired properties of the laser-engravable layer or the matrix, for example with regard to hardness, elasticity or flexibility. Suitable binders can be subdivided essentially into 3 groups, without the binders being intended to be limited thereto.
  • the first group includes such binders having ethylenically unsaturated groups.
  • the ethylenically unsaturated groups can be crosslinked photochemically, thermochemically, by means of electron beams or with any combination of these processes.
  • a mechanical reinforcement can be made by means of fillers.
  • Such binders are, for example, those which comprise copolymerized 1,3-diene monomers, such as isoprene or 1,3-butadiene.
  • the ethylenically unsaturated group can in this case function as a chain constituent of the polymer (1, 4 incorporation), or it can be bound to the polymer chain as a side group (1, 2 incorporation).
  • Examples include natural rubber, polybutadiene, polyisoprene, styrene-butadiene rubber, nitrile-butadiene rubber, acrylonitrile-butadiene-styrene (ABS) copolymer, butyl rubber, styrene-isoprene rubber, polychloroprene, polynorbornene rubber, ethylene Propylene-diene rubber (EPDM) or polyurethane elastomers having ethylenically unsaturated groups.
  • Other examples include thermoplastic elastomeric block copolymers of alkenyl aromatics and 1,3-dienes. The block copolymers may be either linear block copolymers or radial block copolymers.
  • ABA-type triblock copolymers usually ABA-type triblock copolymers, but they can also be AB-type diblock polymers, or those having a plurality of alternating elastomeric and thermoplastic blocks, eg ABABA. It is also possible to use mixtures of two or more different block copolymers. Commercially available triblock copolymers often contain certain proportions of two-block copolymers. Diene units can be 1, 2, or 1, 4 linked. Both block copolymers of styrene-butadiene and of styrene-isoprene type can be used. They are available, for example under the name Kraton ® commercially. Furthermore possible to employ thermoplastic-elastomeric block copolymers having end blocks of styrene and a random styrene-butadiene middle block, which are available under the name Styroflex ®.
  • ethylenically unsaturated binder examples include modified binders in which crosslinkable groups are introduced into the polymeric molecule by grafting reactions.
  • the second group includes such binders having functional groups.
  • the functional groups can be thermochemically crosslinked by means of electron beams, photochemically or with any combination of these processes.
  • a mechanical reinforcement can be made by means of fillers.
  • suitable functional groups include -Si (HR 1 ) O-, -Si (R 1 R 2 ) O-, -OH, -NH 2 , -NHR 1 , -COOH, -COOR 1 , -COHN 2 , -O- C (O) NHR 1 , -SO 3 H or -CO-.
  • binders include silicone elastomers, acrylate rubbers, ethylene-acrylate rubbers, ethylene-acrylic acid rubbers or ethylene-vinyl acetate rubbers and their partially hydrolyzed derivatives, thermoplastic elastomeric polyurethanes, sulfonated polyethylenes or thermoplastic elastomeric polyesters.
  • R 1 and, if present, R 2 are different or preferably identical and selected from organic groups and in particular C 1 -C 6 -alkyl.
  • binders which have both ethylenically unsaturated groups and functional groups.
  • examples include addition-crosslinking silicone elastomers having functional and ethylenically unsaturated groups, copolymers of butadiene with (meth) acrylates, (meth) acrylic acid or acrylonitrile, and also copolymers or block copolymers of butadiene or isoprene with functionalized styrene derivatives, for example block copolymers of butadiene and hydroxystyrene.
  • the third group of binders includes those which have neither ethylenically unsaturated groups nor functional groups. These include, for example, polyolefins or ethylene / propylene elastomers or products obtained by hydrogenation of diene units, such as, for example, SEBS rubbers.
  • Polymer layers which contain binders without ethylenically unsaturated or functional groups generally have to be reinforced mechanically, with the aid of high-energy radiation or a combination thereof, in order to enable optimum sharp-edged structuring by means of laser.
  • binders which may be both binders from in each case only one of the groups described, or mixtures of binders from two or all three groups.
  • the possible combinations are limited only insofar as the suitability of the polymer layer for the laser structuring process and the molding process must not be adversely affected.
  • a mixture of at least one elastomeric binder which has no functional groups can advantageously be used with at least one further binder which has functional groups or ethylenically unsaturated groups.
  • the proportion of the binder (s) in the elastomeric layer or laser-engravable layer is from 30% by weight to 99% by weight relative to the sum of all the constituents of the elastomeric layer or laser-engravable layer concerned, preferably 40 to 95 wt .-%, and most preferably 50 to 90 wt .-%.
  • polyurethane layer (C) is formed by means of a silicone matrix.
  • silicone matrices are understood as meaning those matrices which are prepared using at least one binder which has at least one, preferably at least three O-Si (R 1 R 2 ) -O-groups per molecule, the variables such as are defined above.
  • the elastomeric layer or laser-engravable layer may comprise reactive low molecular weight or oligomeric compounds.
  • Oligomeric compounds generally have a molecular weight of not more than 20,000 g / mol. Reactive low molecular weight and oligomeric compounds will hereinafter be referred to as monomers for the sake of simplicity.
  • monomers can be added in order to increase the rate of photochemical or thermochemical crosslinking or crosslinking by means of energy-rich radiation, if desired.
  • the addition of monomers for acceleration is generally not mandatory.
  • the addition of monomers is recommended in this group, without this necessarily being necessary in every case.
  • monomers can also be used to control the crosslink density. Depending on the nature and amount of the low molecular weight compounds added, further or narrower networks are obtained.
  • monomers on the one hand known ethylenically unsaturated monomers can be used.
  • the monomers should be substantially compatible with the binders and have at least one photochemically or thermochemically reactive group. They should not be volatile.
  • the boiling point of suitable monomers is preferably at least 150 ° C.
  • Examples include n-butyl acrylate, 2-ethylhexyl acrylate, lauryl acrylate, 1,4-butanediol di (meth) acrylate, 1,6-hexanediol diacrylate, 1,6-hexanediol dimethacrylate, 1,9-nonanediol diacrylate, trimethylolpropane trimethacrylate, trimethylolpropane triacrylate, Dipropylene glycol diacrylate, tripropylene glycol diacrylate, dioctyl fumarate, N-dodecylmaleimide and triallyl isocyanurate.
  • Particularly suitable monomers for the thermochemical reinforcement include reactive low molecular weight silicones such as cyclic siloxanes, Si-H-functional siloxanes, siloxanes with alkoxy or ester groups, sulfur-containing siloxanes and silanes, dialcohols such as 1,4-butanediol, 1, 6- Hexanediol, 1, 8-octanediol, 1, 9-nonanediol, diamines such as 1, 6-hexanediamine, 1, 8-octanediamine, amino alcohols such as ethanolamine, diethanolamine, butylethanolamine, dicarboxylic acids such as 1, 6-hexanedicarboxylic acid , Terephthalic acid, maleic acid or fumaric acid.
  • reactive low molecular weight silicones such as cyclic siloxanes, Si-H-functional siloxanes, siloxanes with alkoxy or ester groups, sulfur-containing siloxanes and silanes, dialcohol
  • monomers which have both ethylenically unsaturated groups and functional groups are also possible to use monomers which have both ethylenically unsaturated groups and functional groups.
  • ⁇ -hydroxy alkyl (meth) acrylates such as ethylene glycol mono (meth) acrylate, 1, 4-butanediol mono (meth) acrylate or 1, 6-hexanediol mono (meth) acrylate.
  • the amount of added monomers 0 to 40 wt .-% with respect to the amount of all components of the elastomeric layer or the laser-engravable layer concerned, preferably 1 to 20 wt .-%.
  • one or more monomers may be employed with one or more catalysts.
  • silicone matrices by adding one or more acids or by organotin compounds, the step 2) of Providing the matrix to accelerate.
  • organotin compounds may be: di-n-butyltin dilaureate, di-n-butyltin diactanoate, di-n-butyltin di-2-ethylhexanoate, di-n-octyltin di-2-ethylhexanoate and di-n-butylbis (i-oxoneodecyloxy) - stannane.
  • the elastomeric layer or the laser-engravable layer may further comprise additives and auxiliaries, for example IR absorbers, dyes, dispersing aids, antistatic agents, plasticizers or abrasive particles.
  • additives and auxiliaries for example IR absorbers, dyes, dispersing aids, antistatic agents, plasticizers or abrasive particles.
  • the amount of such additives and auxiliaries should as a rule not exceed 30% by weight with respect to the amount of all components of the elastomeric layer or the relevant laser-engravable layer.
  • the elastomeric layer or the laser-engravable layer can be constructed from a plurality of individual layers. These individual layers can be of the same, approximately the same or different material composition.
  • the thickness of the laser-engravable layer or all individual layers together is generally between 0.1 and 10 mm, preferably 0.5 to 3 mm. The thickness can be suitably selected depending on application and machine process parameters of the laser engraving process and the molding process.
  • the elastomeric layer or the laser-engravable layer may optionally further comprise a top layer having a thickness of not more than 300 ⁇ m.
  • the composition of such a topsheet can be selected for optimal engravability and mechanical stability while selecting the composition of the underlying layer for optimum hardness or elasticity.
  • the topsheet itself is laser engravable or can be removed by laser engraving together with the underlying layer.
  • the topsheet comprises at least one binder. It may further comprise an absorber for laser radiation or even monomers or auxiliaries.
  • silicone dies are a laser engraved silicone die.
  • thermoplastic elastomeric binders or silicone elastomers are used for the process according to the invention.
  • the production preferably takes place by extrusion between a carrier film and a cover film or cover element followed by calendering, as disclosed, for example, for flexographic printing elements in EP-A 0 084 851. In this way even thicker layers can be produced in a single work make a gear. Multilayer elements can be produced by coextrusion.
  • the laser-engravable layer before laser engraving by heating (thermochemically), by irradiation with UV light (photochemically) or by irradiation with high-energy radiation ( actinic) or any combination thereof.
  • the laser-engravable layer or the layer composite is applied to a cylindrical (temporary) support, for example made of plastic, glass fiber reinforced plastic, metal or foam, for example by means of adhesive tape, negative pressure, clamping devices or magnetic force, and engraved as described above.
  • a cylindrical (temporary) support for example made of plastic, glass fiber reinforced plastic, metal or foam, for example by means of adhesive tape, negative pressure, clamping devices or magnetic force, and engraved as described above.
  • the planar layer or the layer composite can also be graved as described above.
  • the laser engravable layer is washed with a round washer or a continuous washer with a debris removal cleaner.
  • the die can be produced as a negative die or as a positive die.
  • the die has a negative structure, so that the coating which can be bonded to the carrier material can be obtained directly by applying a liquid synthetic material to the surface of the die and then solidifying the polyurethane.
  • the die has a positive structure, so that first a negative die is produced by molding of the laser-structured positive die.
  • the coating which can be bonded to a flat support can then be obtained from this negative die by applying a liquid plastic material to the surface of the negative die and then solidifying the plastic material.
  • structural elements having dimensions in the range from 10 to 500 ⁇ m are engraved into the matrix.
  • the structural elements may be formed as elevations or depressions.
  • the structural elements have a simple geometric shape and are, for example, circles, ellipses, squares, diamonds, triangles and stars.
  • the structural elements can form a regular or irregular grid. Examples are a classical dot matrix or a stochastic screen, for example a frequency-modulated screen.
  • cells are introduced into the matrix having an average depth in the range from 50 to 250 ⁇ m and a center distance in the range from 50 to 250 ⁇ m.
  • the die may be engraved to have "cups" (depressions) having a diameter in the range of 10 to 500 microns at the surface of the die
  • the diameter at the die surface is 20 to 250 microns and more particularly preferably from 30 to 150 [mu] m.
  • the spacing of the wells may be, for example, 10 to 500 [mu] m, preferably 20 to 200 [mu] m, particularly preferably 80 [mu] m.
  • the die preferably still has a surface fine structure in addition to a surface coarse structure.
  • Both coarse and fine structure can be produced by laser engraving.
  • the fine structure may be, for example, a microroughness with a roughness amplitude in the range of 1 to 30 ⁇ m and a roughness frequency of 0.5 to 30 ⁇ m.
  • the dimensions of the microroughness are preferably in the range from 1 to 20 ⁇ m, particularly preferably 2 to 15 ⁇ m and particularly preferably 3 to 10 ⁇ m.
  • Laser engraving is especially suitable for IR lasers. However, it is also possible to use lasers with shorter wavelengths, provided the laser has sufficient intensity. For example, a frequency doubled (532nm) or frequency tripled (355nm) Nd-Y AG laser can be used, or an excimer laser (e.g., 248nm). For laser engraving, for example, a CO 2 laser with a wavelength of 10640 nm can be used. Particular preference is given to using lasers having a wavelength of 600 to 2000 nm. For example, Nd-Y AG lasers (1064 nm), IR diode lasers or solid-state lasers can be used. Particularly preferred are Nd / YAG lasers.
  • the image information to be engraved is transmitted directly from the lay-out computer system to the laser apparatus. The lasers can be operated either continuously or pulsed.
  • the template obtained can be used directly after production. If desired, the resulting template can still be cleaned. By such a cleaning step detached, but not yet completely removed from the surface layer components are removed.
  • simple treatment with water, water / surfactant, alcohols or inert organic cleaning agents is sufficient, which are preferably low in swelling.
  • an aqueous formulation of polyurethane is applied to the matrix.
  • the application can preferably be effected by spraying.
  • the die should be heated when applying the formulation of polyurethane, for example, to temperatures of at least 80 0 C, preferably at least 90 0 C.
  • the water from the aqueous formulation of polyurethane evaporates and forms the capillaries in the solidifying polyurethane layer.
  • aqueous in connection with the polyurethane dispersion, is meant that it contains water, but less than 5% by weight, based on the dispersion, preferably less than 1% by weight of organic solvent. Most preferably, no volatile organic solvent can be detected.
  • Volatile organic solvents are solvents such organic solu- understood in the context of the present invention have a boiling point of up to 200 0 C at atmospheric pressure.
  • the aqueous polyurethane dispersion may have a solids content in the range from 5 to 60 wt .-%, preferably 10 to 50 wt .-% and particularly preferably 25 to 45 wt .-%.
  • Polyurethanes are well known, commercially available and generally consist of a soft phase of higher molecular weight polyhydroxyl compounds, e.g. of polycarbonate, polyester or polyether segments, and a urethane hard phase, formed from low molecular weight chain extenders and di- or polyisocyanates.
  • polyurethanes PU
  • PU polyurethanes
  • (b) isocyanate-reactive compounds usually having a molecular weight (Mw) of 500 to 10,000 g / mol, preferably 500 to 5,000 g / mol, more preferably 800 to 3,000 g / mol, and
  • (C) chain extenders having a molecular weight of 50 to 499 g / mol, optionally in the presence of
  • the starting components and processes for the preparation of the preferred polyurethanes (PU) are set forth.
  • the components (a), (b), (c) and optionally (d) and / or (e) usually used in the preparation of the polyurethanes (PU) are described below by way of example:
  • isocyanates (a) it is possible to use generally known aliphatic, cycloaliphatic, araliphatic and / or aromatic isocyanates, for example tri-, tetra-, penta-, hexa-, hepta- and / or octamethylene diisocyanate, 2-methylpentamethylene diisocyanate 1, 5, 2-ethyl-butylene-diisocyanate-1, 4, pentamethylene-diisocyanate-1, 5, butyric len-diisocyanate-1, 4, 1-isocyanato-3,3,5-trimethyl-5-isocyanato-methyl-cyclohexane (isophorone diisocyanate, IPDI), 1, 4 and / or 1, 3-bis (isocyanatomethyl) cyclohexane ( HXDI), 1, 4-cyclohexane diisocyanate, 1-methyl-2,4- and / or -2, 6-cyclohexane di
  • 2,4- and / or 2,6-tolylene diisocyanate diphenylmethane diisocyanate, 3,3'-dimethyldiphenyl diisocyanate, 1, 2-diphenylethane diisocyanate and / or phenylene diisocyanate.
  • 4,4'-MDI is used.
  • aliphatic diisocyanates in particular hexamethylene diisocyanate (HDI)
  • HDI hexamethylene diisocyanate
  • aromatic diisocyanates such as 2,2'-, 2,4'- and / or 4,4'-diphenylmethane diisocyanate (MDI) and mixtures of the above-mentioned isomers.
  • isocyanate-reactive compounds (b) it is possible to use the generally known isocyanate-reactive compounds, for example polyesterols, polyetherols and / or polycarbonatediols, which are usually also grouped under the term "polyols", with molecular weights (M w ) in the region of 500 and 8,000 g / mol, preferably 600 to 6,000 g / mol, in particular 800 to 3,000 g / mol, and preferably an average functionality to isocyanates of 1, 8 to 2.3, preferably 1, 9 to 2.2, in particular 2.
  • polyesterols polyetherols and / or polycarbonatediols
  • M w molecular weights
  • Polyether polyols are preferably used, for example those based on generally known starter substances and customary alkylene oxides, for example ethylene oxide, 1,2-propylene oxide and / or 1,2-butylene oxide, preferably polyetherols based on polyoxytetramethylene (polyTHF), 1 , 2-propylene oxide and ethylene oxide.
  • Polyetherols have the advantage that they have a higher hydrolytic stability than polyesterols, and are preferably as component (b), in particular for the production of soft polyurethanes polyurethane (PU 1).
  • Particularly suitable polycarbonate diols are aliphatic polycarbonate diols, for example 1,4-butanediol polycarbonate and 1,6-hexanediol polycarbonate.
  • polyester diols are those mentioned by polycondensation of at least one primary diol, preferably at least one primary aliphatic diol, for example ethylene glycol, 1, 4-butanediol, 1, 6-hexanediol, neopentyl glycol or more preferably 1, 4-dihydroxymethylcyclohexane (as Mixture of isomers) or mixtures of at least two of the aforementioned diols on the one hand and at least one, preferably at least two dicarboxylic acids or their anhydrides on the other hand.
  • primary diol preferably at least one primary aliphatic diol
  • ethylene glycol 1, 4-butanediol, 1, 6-hexanediol, neopentyl glycol or more preferably 1, 4-dihydroxymethylcyclohexane (as Mixture of isomers) or mixtures of at least two of the aforementioned diols on the one hand and at least one, preferably
  • Preferred dicarboxylic acids are aliphatic dicarboxylic acids such as adipic acid, glutaric acid, succinic acid and aromatic dicarboxylic acids such as phthalic acid and in particular isophthalic acid.
  • Polyetherols are preferably by addition of alkylene oxides, in particular ethylene oxide, propylene oxide and mixtures thereof, of diols such as ethylene glycol, 1, 2-propylene glycol, 1, 2-butylene glycol, 1, 4-butanediol, 1, 3-propanediol, or at Triols such as glycerin, prepared in the presence of highly active catalysts.
  • Such highly active catalysts include cesium hydroxide and dimetal cyanide catalysts, also referred to as DMC catalysts.
  • DMC catalysts include cesium hydroxide and dimetal cyanide catalysts, also referred to as DMC catalysts.
  • a frequently used DMC catalyst is zinc hexacyanocobaltate.
  • the DMC catalyst can be left in the polyetherol after the reaction, preferably it is removed, for example by sedimentation or filtration.
  • isocyanate-reactive compounds (b) proportionately one or more diols or diamines having a carboxylic acid group or sulfonic acid group (b '), in particular alkali metal or ammonium salts of 1, 1-dimethylolbutanoic, 1, 1-dimethylolpropionic or
  • Chain extenders (c) used are aliphatic, araliphatic, aromatic and / or cycloaliphatic compounds having a molecular weight of 50 to 499 g / mol and at least two functional groups, preferably compounds having exactly two functional groups per molecule, known per se -
  • diamines and / or alkanediols having 2 to 10 carbon atoms in the alkylene radical in particular 1, 3-propanediol, butanediol-1, 4, hexanediol-1, 6 and / or di-, tri-, tetra-, penta-, Hexa, hepta, octa, nona and / or Dekaalkylenglykole having 3 to 8 carbon atoms per molecule, preferably corresponding oligo- and / or polypropylene glycols, whereby mixtures of chain extenders (c) can be used.
  • the components (a) to (c) are particularly preferably difunctional compounds, ie diisocyanates (a), difunctional polyols, preferably polyetherols (b) and difunctional chain extenders, preferably diols.
  • Suitable catalysts (d) which in particular accelerate the reaction between the NCO groups of the diisocyanates (a) and the hydroxyl groups of the synthesis components (b) and (c), are known per se tertiary amines, such as triethylamine, dimethylcyclohexylamine, N-methylmorpholine , N, N'-dimethylpiperazine, 2- (dimethylaminoethoxy) -ethanol, diazabicyclo- (2,2,2) -octane ("DABCO”) and similar tertiary amines, and in particular organic metal compounds such as titanic acid esters, iron Connections such.
  • DABCO diazabicyclo- (2,2,2) -octane
  • iron (III) acetylacetonate tin compounds, e.g. Tin diacectate, tin dioctoate, tin dilaurate or the tin dialkyl salts of aliphatic carboxylic acids such as dibutyltin diacetate, dibutyltin dilaurate or the like.
  • the catalysts are usually used in amounts of from 0.0001 to 0.1 parts by weight per 100 parts by weight of component (b).
  • auxiliaries and / or additives (e) can also be added to components (a) to (c). Mention may be made, for example, of blowing agents, anti-block agents, surface-active substances, fillers, for example fillers based on nanoparticles, in particular fillers based on CaCO 3, furthermore nucleating agents, lubricants, dyes and pigments, antioxidants, for example against hydrolysis, light, heat or discoloration , inorganic and / or organic fillers, reinforcing agents and plasticizers, metal deactivators.
  • component (e) also includes hydrolysis protectants such as, for example, polymeric and low molecular weight carbodiimides.
  • the soft polyurethane contains triazole and / or triazole derivative and antioxidants in an amount of 0.1 to 5 wt .-% based on the total weight of the relevant soft polyurethane.
  • antioxidants are generally suitable substances which inhibit or prevent unwanted oxidative processes in the plastic to be protected. In general, antioxidants are commercially available. Examples of antioxidants are hindered phenols, aromatic amines, thiosynergists, trivalent phosphorus organophosphorus compounds, and hindered amine light stabilizers. Examples of sterically hindered phenols can be found in Plastics Additive Handbook, 5th edition, H. Zweifel, ed, Hanser Publishers, Kunststoff, 2001 ([1]), pp.
  • 98-107 and pp.116-p121 aromatic amines can be found in [1] pp. 107-108.
  • Examples of thiosynergists are given in [1], p.104-105 and p.1 12-113.
  • Examples of phosphites can be found in [1], p.109-112.
  • Examples of hindered amine light stabilizers are given in [1], p.123-136.
  • For use in the antioxidant mixture are preferably phenolic antioxidants.
  • the antioxidants in particular the phenolic antioxidants, have a molecular weight of greater than 350 g / mol, more preferably greater than 700 g / mol and a maximum molecular weight (M w ) of at most 10,000 g / mol, preferably up to a maximum of 3,000 g / mol on. Furthermore, they preferably have a melting point of at most 180 ° C. Furthermore, preference is given to using antioxidants which are amorphous or liquid. Likewise, as component (e) it is also possible to use mixtures of two or more antioxidants.
  • chain regulators chain terminators
  • chain regulators chain terminators
  • Such chain regulators are compounds which have only one isocyanate-reactive functional group, such as monofunctional alcohols, monofunctional amines and / or monofunctional polyols.
  • chain regulator can flow behavior, especially at soft polyurethanes, can be adjusted.
  • Chain regulators can generally be used in an amount of from 0 to 5, preferably 0.1 to 1, parts by weight, based on 100 parts by weight of component (b), and fall by definition under component (c).
  • crosslinking agents having two or more isocyanate-reactive groups towards the end of the synthesis reaction, for example hydrazine hydrate.
  • components (b) and (c) can be selected in relatively wide molar ratios.
  • Molar ratios of component (b) to total chain extenders (c) to be used have proved to be from 10: 1 to 1:10, in particular from 1: 1 to 1: 4, the hardness of the soft polyurethanes increasing with increasing content of (c ) increases.
  • the reaction for the preparation of polyurethane (PU) may be at a ratio of 0.8 to 1, 4: 1, preferably at a ratio of 0.9 to 1, 2: 1, more preferably at a ratio of 1, 05 to 1 , 2: 1.
  • the index is defined by the ratio of the total isocyanate groups used in the reaction of component (a) to the isocyanate-reactive groups, i. the active hydrogens, the components (b) and optionally (c) and optionally monofunctional isocyanate-reactive components as chain terminators such as e.g. Monoalcohols.
  • polyurethane (PU) can be carried out continuously by methods known per se, for example by one-shot or the prepolymer process, or discontinuously by the prepolymer process known per se.
  • the reacting components (a), (b), (c) and optionally (d) and / or (e) may be mixed together successively or simultaneously with the reaction starting immediately.
  • Polyurethane (PU) can be dispersed in water by methods known per se, for example by dissolving polyurethane (PU) in acetone or preparing it as a solution in acetone, adding water and then removing the acetone, for example by distilling off.
  • polyurethane (PU) is prepared as a solution in N-methylpyrrolidone or N-ethylpyrrolidone, water is added and the N-methylpyrrolidone or N-ethylpyrrolidone is removed.
  • aqueous dispersions comprise two different polyurethanes polyurethane (PU 1) and polyurethane (PU 2), of which polyurethane (PU 1) is a so-called soft polyurethane, which is constructed as described above as polyurethane (PU), and at least one hard polyurethane (PU2).
  • Hard polyurethane (PU2) can in principle be prepared analogously to soft polyurethane (PU 1), but other isocyanate-reactive compounds (b) or other mixtures of isocyanate-reactive compounds (b) are also used in the context of the present invention Isocyanate-reactive compounds (b2) or abbreviated to compound (b2).
  • Examples of compounds (b2) are in particular 1, 4-butanediol, 1, 6-hexanediol and neopentyl glycol, either in admixture with one another or in admixture with polyethylene glycol.
  • mixtures of diisocyanates for example mixtures of HDI and IPDI, are selected as the diisocyanate (a) and polyurethane (PU2), larger amounts of IPDI being selected for the preparation of hard polyurethane (PU2) than for the production of soft Polyurethane (PU 1).
  • polyurethane has a Shore A hardness in the range of more than 60 to a maximum of 100, the Shore hardness A according to DIN 53505 being determined after 3 seconds.
  • polyurethane has a mean particle diameter in the range of 100 to 300 nm, preferably 120 to 150 nm, determined by laser light scattering.
  • soft polyurethane (PU1) has an average particle diameter in the range of 100 to 300 nm, preferably 120 to 150 nm, determined by laser light scattering.
  • polyurethane has a mean particle diameter in the range from 100 to 300 nm, preferably from 120 to 150 nm, determined by laser light scattering.
  • the aqueous polyurethane dispersion may further comprise at least one curing agent, which may also be referred to as a crosslinker.
  • Suitable hardeners are compounds which can crosslink a plurality of polyurethane molecules with one another, for example on thermal activation.
  • Crosslinking agents based on trimeric diisocyanates, in particular based on aliphatic diisocyanates such as hexamethylene diisocyanate, are particularly suitable. Very particular preference is given to crosslinkers, as described in WO 2008/113755.
  • Aqueous polyurethane dispersions may contain further constituents, for example (f) a silicone compound having reactive groups, in the context of the present invention also called silicone compound (f).
  • reactive groups in connection with silicone compounds (f) are, for example, carboxylic acid groups, carboxylic acid derivatives such as, for example, carboxylic acid methyl esters or carboxylic anhydrides, in particular succinic anhydride groups, and particularly preferably carboxylic acid groups.
  • Examples for reactive groups are further primary and secondary amino groups, for example NH (iso-C3H 7) groups, NH (n-C3H 7) groups, NH (cyclo-C6Hn) -Grup- pen and NH (n-C4H9) - Groups, in particular NH (C2H 5 ) groups and NH (CH3) groups, and most preferably NH 2 groups.
  • NH iso-C3H 7
  • NH (n-C3H 7) groups NH (cyclo-C6Hn) -Grup- pen
  • NH (n-C4H9) - Groups in particular NH (C2H 5 ) groups and NH (CH3) groups, and most preferably NH 2 groups.
  • aminoalkylamino preferably such as -NH-CH 2 -CH 2 -NH 2 groups, -NH-CH2-CH 2 -CH 2 NH 2 groups, -NH-CH 2 -CH 2 -NH (C 2 H 5 ) Groups, -NH-CH 2 -CH 2 -CH 2 -NH (C 2 H 5 ) groups, -NH-CH 2 -CH 2 -NH (CH 3 ) groups, -NH-CH 2 -CH 2 -CH 2 -NH (CH 3 ) groups.
  • a 2 is selected from arylene, unsubstituted or substituted by one to four C 1 -C 4 -alkyl groups, alkylene and cycloalkylene such as 1, 4-cyclohexylene.
  • Preferred spacers A 2 are phenylene, especially para-phenylene, furthermore toluene, in particular para-toluylene, and C 2 -C 8 -alkylene such as, for example, ethylene (CH 2 CH 2 ), furthermore - (CH 2 ) 3-, - (CH 2 ) 4-, - (CH 2 ) S-, - (CH 2 J 6 -, - (CH 2 ) S-, - (CH 2 ) io-, - (CH 2 ) i 2 -, - (CH 2 ) i 4 -, - (CH 2 ) i 6 - and - (CH 2 ) i ⁇ -.
  • ethylene CH 2
  • C 2 -C 8 -alkylene such as, for example, ethylene (CH 2 CH 2 ), furthermore - (CH 2 ) 3-, - (CH 2 ) 4-, - (CH 2 ) S-, - (CH 2 J 6 -, -
  • non-reactive groups in particular di-Ci-Cio-alkyl-Si0 2 groups or phenyl-Ci-Cio-alkyl-Si0 2 - groups, in particular dimethyl-SiO 2 groups, and optionally one or more Si (CH 3 ) 2 -OH groups or Si (CH 3 ) 3 groups.
  • an aqueous polyurethane dispersion furthermore comprises a polydi-C 1 -C 4 -alkylsiloxane (g) which has neither amino groups nor COOH groups, preferably a polydimethylsiloxane, in the context of the present invention also briefly polydialkylsiloxane (g) or Polydimethylsiloxane (g) called.
  • a polydi-C 1 -C 4 -alkylsiloxane which has neither amino groups nor COOH groups, preferably a polydimethylsiloxane, in the context of the present invention also briefly polydialkylsiloxane (g) or Polydimethylsiloxane (g) called.
  • C 1 -C 4 -alkyl in polydialkylsiloxane (g) may be different or preferably identical and selected from methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl and tert-butyl, with unbranched Ci-C 4 -AlkVl is preferred, particularly preferred is methyl.
  • aqueous polyurethane dispersion contains in total in the range from 20 to 30% by weight of polyurethane (PU), or altogether in the range from 20 to 30% by weight of polyurethanes (PU1) and (PU2), if appropriate in the range of 1 to 10, preferably 2 to 5 wt .-% hardener, optionally in the range of 1 to 10 wt .-% silicone compound (f), in the range of zero to 10, preferably 0.5 to 5 wt .-% Polydialkylsiloxane (g).
  • aqueous polyurethane dispersion in the range of 10 to 30 wt% contains soft polyurethane (PU 1) and in the range of zero to 20 wt% hard polyurethane (PU2).
  • aqueous polyurethane dispersion has a total solids content of from 5 to 60% by weight, preferably from 10 to 50% by weight and more preferably from 25 to 45% by weight.
  • the 100 wt% missing moiety is preferably continuous phase, for example water or a mixture of one or more organic solvents and water.
  • aqueous polyurethane dispersion contains at least one additive (h) selected from pigments, matting agents, light stabilizers, antistatic agents, antisoil, anticancer, thickening agents, in particular thickeners based on polyurethanes, and hollow microspheres.
  • additive selected from pigments, matting agents, light stabilizers, antistatic agents, antisoil, anticancer, thickening agents, in particular thickeners based on polyurethanes, and hollow microspheres.
  • aqueous polyurethane dispersion contains a total of up to 20% by weight of additives (h).
  • Aqueous polyurethane dispersion may also contain one or more organic solvents.
  • Suitable organic solvents are, for example, alcohols such as ethanol or isopropanol and in particular glycols, diglycols, triglycols or tetra-glycols and di- or preferably simply glycols, diglycols, triglycols or tetraglycols etherified with C 1 -C 4 -alkyl.
  • Suitable organic solvents are ethylene glycol, propylene glycol, butylene glycol, diethylene glycol, triethylene glycol, Tetraethylene glycol, dipropylene glycol, 1, 2-dimethoxyethane, methyltriethylene glycol ("methyltriglycol”) and triethylene glycol n-butyl ether (“butyltriglycol”).
  • aqueous dispersion 7% by weight of an aqueous dispersion (particle diameter: 125 nm, solids content: 40%) of a soft polyurethane (PU1.1) prepared from hexamethylene diisocyanate (a 1.1) and isophorone diisocyanate (a1.2) in a ratio by weight of 13:10 as diisocyanates and as diols a polyester diol (b1.1) having a molecular weight M w of 800 g / mol, prepared by polycondensation of isophthalic acid, adipic acid and 1, 4-dihydroxymethylcyclohexane (mixture of isomers) in a molar ratio of 1: 1: 2 , 5 wt .-% 1, 4-butanediol (b1.2), and 3 wt .-% monomethylated polyethylene glycol (c.1) and 3 wt .-% H 2 N-CH 2 CH 2 -NH-CH 2 CH 2 -
  • aqueous dispersion Disp.1 having a solids content of 35% and a kinematic viscosity of 25 seconds at 23 ° C, determined according to DIN EN ISO 2431, as of May 1996.
  • a soft polyurethane prepared from hexamethylene diisocyanate (a 1.1) and isophorone diisocyanate (a1.2) in the ratio by weight 13:10 as diisocyanates and as diols a polyester diol (b1.1) having a molecular weight M w of 800 g / mol, prepared by polycondensation of isophthalic acid, adipic acid and 1,4-dihydroxymethylcyclohexane (mixture of isomers) in a molar ratio of 1: 1: 2, 5 wt .-% 1, 4-butanediol (b1.2), 3 wt .-% monomethylated polyethylene glycol (c.1) and 3 wt .-% H 2 N-CH 2 CH 2 -NH-CH 2 CH 2 -COOI-I, wt .-% in each case based on polyester diol (b1. 1 ),
  • a liquid silicone was poured onto a pad having the pattern of a full-grain calfskin.
  • the mixture was allowed to cure by adding a solution of di-n-butylbis (1-oxoneodecyloxy) stannane as a 25% by weight solution in tetraethoxysilane as an acidic curing agent to give an average 2 mm thick silicone rubber layer as the template served.
  • the die was glued to a 1.5 mm thick aluminum support.
  • the spray nozzle was mobile at a height of 20 cm from the continuous base in the direction of movement thereof and moved transversely to the direction of movement of the base.
  • the pad had passed the spray nozzle after about 14 seconds and had a temperature of 59 ° C. After about two minutes of exposure to dry, 85 ° C warm air, the net-looking polyurethane film so prepared was nearly anhydrous.
  • a die coated with polyurethane film and tie layer was obtained.
  • the support material with the sprayed side on the still-warm bonding layer which is located together with polyurethane film on the die, placed and pressed in a press at 4 bar and 1 10 0 C for 15 seconds.
  • the membrane M.1 thus obtained is removed from the press and the matrix is removed.
  • Membrane M.1 is glued over the entire surface of the body of a car dashboard.
  • the manufacture of the raw body dispenses with the attachment of ventilation slots, and there are only recesses for various instruments and switches. Instead, a flow of air through the rear channels is led to the back of the membrane M.1, creating a pleasant climate inside the vehicle, without a strong air flow would be felt.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Laminated Bodies (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Instrument Panels (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

L'invention concerne un objet présentant au moins une ouverture à travers laquelle passe un flux d'air. L'objet selon l'invention est caractérisé en ce que cette ouverture est recouverte du côté visible d'une membrane perméable à l'air ou respirante optiquement plaisante que le flux gazeux traverse. Selon l'invention, la membrane comporte au moins deux couches dont l'une comprend au moins un polyuréthane et est pourvue d'un motif.
EP09783868A 2008-10-15 2009-10-09 Objets présentant au moins une ouverture recouverte d'une membrane et leur procédé de production Withdrawn EP2349756A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09783868A EP2349756A1 (fr) 2008-10-15 2009-10-09 Objets présentant au moins une ouverture recouverte d'une membrane et leur procédé de production

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP08166642 2008-10-15
EP09783868A EP2349756A1 (fr) 2008-10-15 2009-10-09 Objets présentant au moins une ouverture recouverte d'une membrane et leur procédé de production
PCT/EP2009/063132 WO2010043549A1 (fr) 2008-10-15 2009-10-09 Objets présentant au moins une ouverture recouverte d'une membrane et leur procédé de production

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EP2349756A1 true EP2349756A1 (fr) 2011-08-03

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US (1) US20120028565A1 (fr)
EP (1) EP2349756A1 (fr)
JP (1) JP2012505787A (fr)
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WO (1) WO2010043549A1 (fr)

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CA2713116C (fr) 2008-02-27 2016-05-10 Basf Se Materiaux composites multicouches comportant une couche de mousse, procedes de fabrication et utilisation de ces materiaux
AT12513U1 (de) * 2010-12-02 2012-06-15 Schaefer Philipp Verbundmaterial
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US20120028565A1 (en) 2012-02-02
JP2012505787A (ja) 2012-03-08
CN102186688A (zh) 2011-09-14

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