DE19639165C2 - Process for obtaining new color effects using pigments with a color that depends on the viewing angle - Google Patents

Description

The invention relates to methods for obtaining new colors fect with pigments with depending on the viewing angle Colourfulness.

Pigments with coloredness depending on the viewing angle are for example from EP-B-601483 (corresponds to US-5,362,315) or DE-A-44 16 191 known. DE-A-44 16 191 discloses exclusively Lich procedures that ensure the even alignment of the room helical axes over the surface (according to the mosaic principle) effect in order to achieve full-surface color effects as completely as possible to reach.

The present invention relates to a method for achieving this new color effects using pigments from the viewing angle dependent color in a matrix according to the characterizing part of claim 1.

Tilting of the helix axis of the pigments Color angle dependent coloration takes place in the invention Process preferably using differently directed Be movement of the pigments in the matrix or by using Pigments of different concentrations in the matrix.

Different pigment concentrations in a matrix can for example in multi-component injection molding by variation the relative proportions of the individual components be put. The pigments are in at least one Component included. With one-component injection molding or Ka landieren or extrusion or extrusion blow molding can be the different pigment concentration in the matrix Use of individual components of different viscosity or  in coextrusion by merging the individual components reach ten.

Another option, different pigment concentrations To achieve NEN is that a matrix with einear processed pigments in a kneader, e.g. B. a stamp mixer, kneading, whereby kneading vortices arise.

Another way to create different pig ment concentrations in a matrix is that at Coating carrier webs to the pigment-containing matrix briefly locally different before their application on the carrier web Amounts of an admixing component can be added. That has different pigment concentrations during the application process Episode.

A different direction of movement of the pigments in one Matrix can also be achieved, for example, in that the matrix is deformed by the action of mechanical forces. This creates locally different flow movements of the Ma trix, which lead to the tilting of the pigments. examples for generating mechanical forces are pressing, spraying casting or deep drawing.

A matrix can be created by the action of mechanical forces can also be deformed by the action of other substances, different flow due to chemical interactions quantities of the matrix occur.

In all processes with locally different pigment concentrations should be given preference be that the pigments in such a concentration in the Matrix exist that local stacking effects of the pigments occur Such effects then do not make the pigments aligned uniformly in the room.

The method according to the invention enables the production of Materials with space or area-selective angle-dependent  Color effects that deal with variation in lighting or Change the observation configuration for specific structural elements using a uniform pigment species with vom Viewing angle dependent color.

The method according to the invention lifts space and / or area lective the mosaic principle, which is disclosed in DE-A-44 16 191 is on.

Matrix systems suitable for the method according to the invention are preferably selected from the group of water-based paints, aqueous dispersions, PMA, SA, polyvinyl derivatives, PVC, Po lyvinylidene chloride, SB-Copo, PV-AC-Copo-resins, ACR, EVA, ACR / PVC graft polymers, EVA / PVC graft polymers, water soluble Binder, shellac, maleic resins, rosin mod. phenol resins, linear and branched saturated polyesters, amino plastic cross-linking saturated polyester, fatty acid mod. al kyd resins, plasticized urea resins, water-thinnable Binders, PUR dispersions, EP resins, urea resins, Mela min resins, phenolic resins, alkyd resins, alkyd resin emulsions, sili con resin emulsions, powder coatings, powder coatings for TRIBO / ES, Po lyester coating powder resins, PUR coating powder resins ze, EP coating powder resins, EP / SP hybrid coating powder resins, PMA coating powder resins, powder coatings for Vortex sintering, thermoplasticised EPS, LD-PE, LLD-PE, HD- PE, PVC, PVC co- and graft polymers, solvent-based paints, One- and two-component paints, shellac, rosin resins ster, maleate resins, nitrocelluloses, rosin-modified Phenolic resins, physically drying saturated polyesters, aminoplast crosslinking saturated polyester, isocyanate crosslinked zende saturated polyester, self-crosslinking saturated poly esters, alkyds with saturated fatty acids, linseed oil alkyd resins, Soybean oil resins, sunflower oil alkyd resins, safflower oil alkyd resins, Ricine alkyd resins, wood oil / linseed oil alkyd resins, mixed oil alkyd resins ze, resin modified alkyd resins, styrene / vinyl toluene modified te alkyd resins, acrylated alkyd resins, urethane-modified Al kyd resins, silicone modified alkyd resins, epoxy modified Alkyd resins, isophthalic acid alkyd resins, non-plasticized  Urea resins, plasticized urea resins, melamine resins, Polyvinyl acetals, non-crosslinking P (M) A homo- or copolyme Risate, non-crosslinking P (M) A homo- or copolymers with Non-acrylic monomers, self-crosslinking P (M) A homo- or copo lymerisate, P (M) A copolymers with other non-acrylic monomers Ren, externally cross-linking P (M) A homo- or copolymers, cross-linking P (M) A copolymers with other non-acrylic monomeric, externally crosslinking P (M) A copolymers with non acrylic monomers, acrylate copolymerization resins, unsaturated Hydrocarbon resins, organically soluble cellulose compounds gen, silicone combination resins, PUR resins, EP resins, peroxide curing unsaturated synthetic resins, radiation-curing synthetic resins photoi containing initiator, radiation-curing synthetic resin photoinitiator free, solvent-free paints, isocyanate-crosslinking saturated Polyester, PUR 2K resin systems, PUR 1K resin systems moist kite-hardening, EP resins, plastics, e.g. B. uncrosslinked, part cross-linked and cross-linked or cross-linking plastics as with for example AAS - methacrylate-acrylic-styrene, ABS - acrylonitrile- Butadiene styrene, ACM - acrylic ester rubber, AES - Acrylni tril-ethylene propylene styrene, AMMA - acrylonitrile methyl methacrylic lat, ANM - acrylic ester rubber, APP - atactic polypropy len, ASA - acrylonitrile styrene acrylic ester, BR - Cis-1,4-polybutadiene, BS - butadiene styrene, CA - Celluloseace tat, CAB - cellulose acetobutyrate, CAP - cellulose acetopropio nat, CF - cresol formaldehyde, CM - chlorinated polyethylene chew Tschuk, CMC - carboxymethyl cellulose, CN - cellulose nitrate, CO - epichlorohydrin rubber, CP - cellulose propionate, CR - Chloropen rubber, CSM - chlorosulfonyl polyethylene, CTA - Cellulose triacetate, DAIP - diallyl isophthalate, DAP - Dial lylphthalate, EC - ethyl cellulose, ECB - ethylene cop. bitumen, ECTFE - ethylene chlorotrifluoroethylene, EEA - ethylene ethyl acre lat, EMA - ethylene methacrylate, EP - epoxy, EPDM - ethylene pro pilen terpolymer, EPE - epoxy resin ester, EPM - ethylene propy len rubber, EPS - expanded polystyrene, ETFE - ethylene Tetrafluoroetylene, EVA, EVAC - ethylene vinyl acetate, EVAL, EVOH - Ethylene vinyl alcohol, FEP - perfluoroethylene propylene, FF - furan resins, FMQ - fluorine modified silicone rubber, FPM - fluorine rubber, Hgw - hard tissue, Hm - hard mats, Hp - hard paper,  IIR - butyl rubber, IPDI - isophorone diisocyanate, IR - Cis 1,4-polyisoprene rubber, MBS - methyl methacrylate buta diene rubber, MC - methyl cellulose, MDI - diphenylmethandii sociant, MF - melanin formaldehyde, MMA - methyl methacrylate, MPF - Melanin-phenol-formaldehyde, MQ - methyl silicone rubber, NBR - Nitrile rubber, NCR - Acrylonitrile chloroprene rubber, NC - nitrocellulose, NDI - naphthylene diisocyanate, NR - natural chew Tschuk, PA - polyamides, PAI - polyamideimides, PAN - polyacrylics nitrile, PBT (P) - polybutylene terephthalate, PC - polycarbonate, PCD - polycarbodiimide, PCTFE - polychlorotrifluoroethelen, PDAP - polydiallyl phthalate, PE - polyethylene, PEBA - polyether Block amides, PEC - polyester carbonate, PE-C - chlorinated Po polyethylene, PEEK - polyacrylethetketone, PEI - polyetherimide, PEO, PEOX - polyethylene oxide, PEP - polyethylene polyamides, PES - Polyethersullphone, PET (P) - polyethylene terephthalate, PEV, PEX - cross-linked polyethylene, PF - phenol-formaldehyde, PFA - Perflu oralkoxy cop., PFEP - polytetrafluoroethylene perfluoropropylene, PHA - phenacrylic resins, PI - polyimide, PIB - polyisobutylene, PIR - polyisocyanurate, PMI - polymethacrylimide, PMMA - polymetyl methacrylate, PMP - poly-4-methylpentene-1, PMQ - phenylmodifi Ornamental silicone rubber, PMS - poly-methyl styrene, PO - polyo lefine, POM - polyoxymethylene, PP - polypropylene, PP-C - chlo polypropylene, PPE - polyphenylene ether, PPMS - polypa ramethylstyrene, PPO - polyphenyl oxide, PPOX - polypropylene oxide, PPS - polyphenylene sulfide, PPSU - polyphenylene sulfone, PS - polystyrene, PSBR - pyridine-styrene-butadiene rubber, PSU - Polysulfone, PTFE - polytetrafluoroethylene, PTP - polyterephtha latex, PUR - Polyurethane, PVAC - Polyvinylacetet, PVAL - Po lyvinyl alcohol, PVB - polyvinyl butyral, PVC - polyvinyl chloride rid, PVC-C - chlorinated polyvinyl chloride, PVDC - polyvinyli denchloride, PVDF - polivinylidene fluoride, PVE - polyvinyl ether, PVF - polyvinyl fluoride, PVFM - polyvinyl formal, PVK - Po lyvinylcarbazol, PVP - polyvinylpyrrolidone, RF - resorcinol Formaldehyde, SAN - styrene-acrylonitrile, SB - styrene-butadiene, SBR - styrene butadiene rubber, SI - silicone, SMA - styrene male anhydride cop., SMS - styrene-methylstyrene, SP - saturated Polyester, TAC - triallyl cyanurate, TDI - toluene diisocyanate, TFA - fluoro-alkoxy terpolymer, TMDI -  Trimethylhexamethylene diisocyanate, TPU - Thermoplastic Po lyurethane, UF - urea formaldehyde, UP - unsaturated po lyester, VAC - vinyl acetate, VC - vinyl chloride, VCE - Vi nilchloride-ethylene cop., VCEVA - vinyl chloride-ethylene-vinyl lacetet, VCOA - vinyl chloridoctyl acetate, VCVDC - vinyl chloride - Vinylidene chloride, VMQ - vinyl modified silicone rubber, VPE - cross-linked polyethylene, VF - volcanic fever, XPS - extru dated, expanded polystyrene, co- and graft polymers, chew Tschuke z. B. silicone rubber, oils such as silicone oil.

Pigments are included in the matrix from the viewing angle dependent color with methods that are usual in practice, such as for example in EP-B-601483 (corresponds to US-5,362,315) and DE-A-44 16 191 are described, incorporated.

The pigments with colors depending on the viewing angle are in amounts of 0.01-70, preferably 0.1 to 20 wt .-% (based on the total weight) in the respective matrix incorporated.

Materials produced by means of the method according to the invention can be used in a wide variety of fields, as the following non-exhaustive list of the possible fields of application shows:
Construction (interiors, facades, wallpapers, doors, windows, interior cladding, gifts, writing utensils, packaging, glasses frames, vehicles (motor vehicle, rail vehicle, aircraft, two-wheeled vehicle), vehicle accessories, sporting goods, play objects, textiles, buttons, leather, cosmetics, jewelry, Household (dishes, furniture, household appliances), printed matter (e.g. cardboard boxes, packaging, carrier bags, papers, labels, foils), documents, check cards, cashless means of payment, banknotes, decorative foils or elements, advertising media, furniture foils, phono foils , Office supplies, (e.g. spine of folders, document folders), photo albums, phone cards, check and credit cards, business cards, key cards, ID cards, air cards, entry cards, seals, floor coverings (paste and thermoplastic technology) Tiles, stamping foils, sheet metal laminating foils, laminating foils for window profiles, label foils, coatings, casting compounds, pebble coverings, foils or coatings for e.g. boats, surfboards, snowboard, skis, glass coatings, printing on glass, winter gardens, sails or inserts for sails, cast foils, mirror foils, lampshade foils, plastics, decorative foils for vehicles inside and outside (e.g. B. burl wood He set, crash pad foils, door side cladding, moldings), textile construction, tents, tent windows, tarpaulins, awnings, housing, z. B. telephones, computer systems, fashion sector, for. B. glasses, jewelry, watches, watch straps, impact resistance, weather-resistant film for skis, sports and leisure clothing and equipment, z. B. Use in sports shoes, rain protection, sun protection (umbrellas, awnings), bathing caps, packaging, self-adhesive films, disk covers, toys, building boards, carpets, wallpapers, wall coatings, sanitary areas, e.g. B. Duschkabi NEN, hollow body, housing.

The following examples serve to further explain the Invention:

Example 1a Synthetic leather made of soft PVC / thermoplastic recipe

• a) 100 parts of polyvinyl chloride commercially available under the name Vinnolit® VH 315/100 from Vinnolit GmbH, Ismaning,
  50 parts of plasticizer commercially available under the name Vinnolit® DIDP from Vinnolit GmbH, Ismaning
  2.5 parts stabilizer commercially available under the name Bärostab® BZ 555 from Bärlocher, Munich,
  1 teaspoon of carbon black paste commercially available under the name Sicotop® black from BASF, Ludwigshafen,
• b) 100 parts of polyvinyl chloride commercially available under the name Vinnolit® H 70 DF from Vinnolit GmbH, Ismaning,
  55 parts of plasticizer commercially available under the name Vinnolit® DIDP from Vinnolit GmbH, Ismaning,
  2.5 parts stabilizer commercially available under the name Sicostab® 241 from BASF, Ludwigshafen,
  0.5 parts of antioxidants commercially available under the name Irganox® 1010 from CIBA-Additive, Bensheim,
  0.2 parts UV absorber commercially available under the name Tinnvin 312 from CIBA-Additive, Bensheim,
  10 parts of platelet-shaped pigments with color depending on the viewing angle (grain diameter 10 to 45 µm).

The platelet-shaped pigments depend on the viewing angle Pending colors were produced as in Example 4 of EP-A-686 674 described, with the difference that the turned set pigment fraction by grinding for 5 minutes in a university Versalmühle and subsequent sieving with an analytical sieve was obtained with a mesh size of 40 microns.

mixture preparation

The components of recipe a and b were each for themselves mixed in a wing mixer (Henschel) until they have reached a temperature of 120 ° C (3600 rpm). to finally the mixture was cooled to 40 ° C. (600 rpm).

The mixture a) was then in a planetary roller extruder (Fa. Ide) pre-plasticized at 180 ° C, on a Bersdorff L laboratory Calender applied at 190 ° C and there with a film a film thickness of 0.3 mm (calender speed 2 m / min.) processed.

Mixture b) was then pre-plasticized as described above coated on a Bersdorff-L laboratory calender at 190 ° C brings and there to a film with a film thickness of 0.3 mm (Calender speed 2 m / min) processed.

The film from mixture b) (film temperature 190 ° C.) was sheared onto the film from mixture a) (film temperature approx. 190 ° C.). A film with 0.6 mm film thickness is obtained. The composite film obtained in this way was then immediately passed around an embossing roll (film b lying on the embossing roll, pressing pressure 5 N / mm ² ), the embossing roll being a leather-like pattern (dimension of the depression: approx. 0.1-0.3 mm, areas about 0.5-5 mm ² ). The leather-like structure was irregular in terms of the faults and the surface area.

In the embossing process with a leather-like structure, certain areas of the film b are displaced and shifted to other areas, so that enrichment and depletion of material occur. The pigments incorporated into film b, which have a color that is dependent on the viewing angle, are distributed to the surface portions in different concentrations and different orientations of their helical axes, so that the mosaic principle described in EP-A-686 674 is disturbed by the embossing process in accordance with the relief-like structure. This results in a color effect that does not change uniformly from green to blue depending on the viewing angle, but rather a color effect that also traces the structure:
The pigments with a color that depends on the viewing angle - like the material itself - are enriched on the bumps and intensify the intensity of the color impression.At the same time, due to the slight tilting, a blue color can be seen at certain points of the bumps, whereas in other parts of the bumps and a green color can be seen in the depressions.

Example 1b

The procedure was as in Example 1a, the embossing taking place as follows: the embossing roller had no depressions (smooth roller). After the production of film a) and film b) as described, film b) was passed around the smooth embossing roller (film b) lying on the embossing roller, contact pressure 1 N / mm ² , an additional embossing paper (silicone-coated paper with a slightly pronounced leather structure, available from Scheufe len, Lenningen, dimension of the recess 0.05-0.1 mm, surface area approx. 0.5-5 mm ² ) was used between the embossing roller and the film. After the embossing and laminating process, the embossing paper was removed again. The structure on the composite film was much weaker, so that the pigments used were aligned more uniformly with the color depending on the viewing angle, and the new color effect was therefore much weaker.

Comparative example

The procedure was as in Example 1, with the difference that instead of the pigments with color depending on the viewing angle an interference pigment (Iriodin® 219, available from Merck, Darmstadt) was used in the same concentration. With the same structuring, there were no different ones Shades of color at certain points in the surveys be careful, but only with very different loading viewing angles on the entire surface regardless of the Structuring. The interference pigments used show egg NEN color flop, but in contrast to the pigments from the Be viewing angle dependent color, manufactured according to EP-A-686 674, only in the case of very different lighting / Viewing configurations so that one is significantly below different alignment of the individual pigments is required, for comparable effects at certain points in the surveys to achieve.

Example 2 polymer alloy example Crash pad foils / flexible thermoformable Multi-layer plastic film for cars recipe

• a) 100 parts of polyvinyl chloride commercially available under the name Vinnolit® H 70 DF from Vinnolit GmbH, Ismaning,
  60 parts. Plasticizer commercially available under the name Vinnolit® DIDP from Vinnolit GmbH, Ismaning,
  2.5 parts stabilizer commercially available under the name Bärostab® BZ 555 from Bärlocher, Munich,
  1 teaspoon of carbon black paste commercially available under the name Sico top® black from BASF, Ludwigshafen,
• b) 100 parts of polyvinyl chloride commercially available under the name Vinnolit® H 70 DF from Vinnolit GmbH, Ismaning,
  60 parts. Plasticizer commercially available under the name Vinnolit® DIDP from Vinnolit GmbH, Ismaning,
  2.5 parts stabilizer commercially available under the name Sicostab® 241 from BASF, Ludwigshafen,
  0.5 parts of antioxidants commercially available under the name Irganox® 1010 from CIBA-Additive, Bensheim,
  0.2 parts. UV absorber commercially available under the name Tinnvin 312 from CIBA-Additive, Bensheim
  10 parts of platelet-shaped pigments with color depending on the viewing angle (grain diameter 10 to 45 µm).

The platelet-shaped pigments depend on the viewing angle Pending colors were produced as in Example 4 of EP-A-686 674 described, with the difference that the turned set pigment fraction by grinding for 5 minutes in a university Versalmühle and subsequent sieving with an analytical sieve was obtained with a mesh size of 40 microns.

mixture preparation

The components of recipe a and b were each for themselves mixed in a wing mixer (Henschel) until they have reached a temperature of 120 ° C (3600 rpm). to finally the mixture was cooled to 40 ° C. (600 rpm).

The mixture a) was then in a planetary roller extruder (Fa. Ide) pre-plasticized at 180 ° C, on a Bersdorff L laboratory Calender applied at 190 ° C and there with a film a film thickness of 0.5 mm (calender speed 2 m / min.) processed.

Mixture b) was then pre-plasticized as described above coated on a Bersdorff-L laboratory calender at 190 ° C brings and there to a film with a film thickness of 0.5 mm (Calender speed 2 m / min) processed.  

The film from mixture b) (film temperature 190 ° C.) was sheared onto the film from mixture a) (film temperature approx. 190 ° C.). A film with 1.0 mm film thickness is obtained. The composite film obtained in this way was then immediately passed around an embossing roll (film B) lying on the embossing roll (pressing pressure 5 N / mm ² ), the embossing roll being a leather-like pattern (dimension of the depression: approx. 0.1-0.3 mm , Surface area approx. 0.5-5 mm ² ).

The film thus produced is then at 180 ° C in Thermoforming process (thermoforming system from Kiefel in Freilas sing) mechanically shaped with a stamp and cooled.

Soft PVC thermoplastic Example 3 example Strap recipe

100 parts Vinnolit® VH 315/100
90 parts Vinnolit® DIDP
2.5 parts.Bärostab® BZ555
0.7 parts Printex® V
0.01 parts of silica are commercially available under the name HDK H20, from Wacker, Munich

mixture preparation

The ingredients of the recipe (except Silicic acid) were in a wing mixer (Henschel) long mixed until a temperature of 120 ° C has been reached. The mixture was then cooled to 45 ° C. Then was de the silica is added and the mixture is cooled further to 40.degree. The mixture was then in a planetary roller extruder (Fa. Ide) pre-plasticized at 185 ° C, on a Bersdorff L laboratory calender applied and there to a film with a foil thickness of 0.5 mm (calender speed 2 m / min.) processed.

Pigments with a color that is dependent on the viewing angle (produced as described in Example 3, EP-A-686 674, with the difference that there was no grinding and screening) are sprinkled into the still hot film as follows:
With the help of a laboratory vibrating trough (AEG - Frankfurt / Main), the pigments were applied to the film in variable concentrations by operating the vibrating trough with different vibrating frequencies. The amount of pigments applied to an m ² film was set between 0 and 10 g / m ² .

effect Description

At a steep viewing angle, a color gradient from white to red can be observed at those points on the film that have been provided with high pigment amounts (5-10 g / m ² ), which changes to a color gradient from white to green at a flat viewing angle. On the other parts of the film that were provided with lower pigment quantities (0-5 g / m ² ), only a color flop from red to green can be seen. The white color is due to the overlaying of individual pigment particles, since a homogeneous alignment of the pigments is no longer possible at these points due to the high local pigment concentration. A particularly pronounced color effect with color flop from red to green can be observed at those areas of the film whose pigment concentration was 5-6 g / m ² , since the pigments are uniformly aligned there and the film has a high degree of pigment coverage (<60 % of the area).

Then the pigments are sprinkled in using a smooth roller pressed in.

From the film produced in this way, in the usual way and processed into semi-finished or finished articles (e.g. watch straps are punched out and welded).

Example 4 Hard PVC Cast films example relief recipe

• a) 50 parts Vinnolit® SA 3060/10
  40 parts Vinnolit® H 60 D
  10 parts modifier (Kane® B 22, Kaneka - Westerlo-Oe vel, Belgium)
  1.5 parts Hostastab® SnS 10
  0.5 parts Loxiol® G16
  0.5 parts wax E
  0.5 parts Printex® V
• b) 50 parts SA 3060/10
  40 parts Vinnolit® H60 DS
  10 parts modifier (Kane® B 22)
  1.5 parts Hostastab® SnS 10
  12 parts of platelet-shaped pigments with color depending on the viewing angle

The platelet-shaped pigments with the coloration dependent on the viewing angle were prepared as described in Example 4 of EP-A-686 674, with the difference that 3.4 g instead of 2.8 g of the red color mixture and 0.6 g instead of 1.2 g of the blue color mixture was used and the pigment fraction used was not ground and sieved.
400 parts THF solvent

mixture preparation Mixture a)

The ingredients of the recipe were in a wing mixer from Henschel until a final temperature of 110 ° C was reached. The mixture was then cooled to 40 ° C.

Mixture b)

All components were placed in a container with an IKA laboratory stirrer until the SA 3060/10, H 60 DS and Kane® B 22 in THF are completely resolved.

The mixture a) was then in a planetary roller extruder (Fa. Ide) pre-plasticized at 180 ° C, on a Bersdorff L laboratory Calender applied at 190 ° C and there with a film a film thickness of 0.3 mm (calender speed 0.2 m / min.) processed.

Solution b) is then applied to film a) as follows:
With the help of a brush, solution b) is applied in a lift amount of 100 g per m ^{2 of film area} . By the solvent THF contained in solution b, the film a) is dissolved so that it warps in relief, since local voltage differences occur as a result of different degrees of dissolution of film components by THF due to different local THF concentration on the film due to the manual application with the help of a brush. Due to the locally different uses of the film, the pigments are aligned differently and partially overlap at those points on the film where solution b) has concentrated in the film. This creates an unprecedented play of colors: with a steep viewing angle, golden, black, white and green areas alternate. From a flat perspective, the green parts predominate, followed by black, gold and white areas.

The white spots do not come from stacked ones pigments based on the mosaic principle, the black areas are without pigments, while the colored areas Areas of the film each of uniformly aligned pig mentions.

Comparative example

The procedure was as in the exemplary embodiment with the difference that the film from recipe a) was produced as follows:
100 parts polyethylene (HD Daplen® MS 6591-95, ÖMV, Burghausen)
0.5 parts Printex® V
Mix in a 10 l Henschel mixer for 5 min. at room temperature. The pre-plastification was carried out as described in the exemplary embodiment, with the difference that a temperature of 170 ° C. was used.

In contrast to the embodiment, the polyethylene film not dissolved by the THF of solution b), so that no ver Throws of the film occur. The pigments are done spread the spreading method evenly on the film tet, so that a uniform over the entire film surface Color impression with a color change from gold to green  arises. This uniform color impression is in EP 686674 described and corresponds to the mosaic principle cited there.

Claims (1)

A method for achieving new color effects by means of pigments with a color in a matrix that is dependent on the viewing angle, which is characterized in that pigments with a color that is dependent on the viewing angle are selectively tilted in the matrix in a spatial and / or area-selective manner after their introduction into the matrix, in which
the pigments are tilted with a color that is dependent on the viewing angle by means of differently directed movement of the pigments in the matrix, or
the tilting of the helix axis of the pigments with the color, which is dependent on the viewing angle, takes place by targeted enrichment or depletion of the pigments in the matrix, or
the tilting of the helix axis of the pigments with a coloration which is dependent on the viewing angle is carried out by using pigments of different concentrations in the matrix.