Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
  • C08K5/0041—Optical brightening agents, organic pigments
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
  • C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
  • C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
  • C08L27/06—Homopolymers or copolymers of vinyl chloride
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
  • B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
  • B29C41/18—Slush casting, i.e. pouring moulding material into a hollow mould with excess material being poured off
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
  • B29L2031/00—Other particular articles
  • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
  • B29L2031/3005—Body finishings
• • 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
  • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
• • 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
  • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
  • Y10T428/252—Glass or ceramic [i.e., fired or glazed clay, cement, etc.] [porcelain, quartz, etc.]
• • 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
  • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
  • Y10T428/254—Polymeric or resinous material
• • 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
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
  • Y10T428/31645—Next to addition polymer from unsaturated monomers
  • Y10T428/31649—Ester, halide or nitrile of addition polymer
• • 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
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31678—Of metal
  • Y10T428/31692—Next to addition polymer from unsaturated monomers
  • Y10T428/31699—Ester, halide or nitrile of addition polymer
• • 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
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31855—Of addition polymer from unsaturated monomers
  • Y10T428/31909—Next to second addition polymer from unsaturated monomers
  • Y10T428/31928—Ester, halide or nitrile of addition polymer

Definitions

• the present invention relates to compositions based on thermoplastic resins, allowing the production of "skins” monolayer or multilayer (so-called composite structures), having a speckled appearance, matrix / inclusions type.
• Multilayer skins or composite structures comprise an outer layer which can be produced according to the invention and at least one inner layer which can also be produced according to the invention or according to a conventional method; these skins include a matrix and inclusions; these monolayer or multilayer skins are used for passenger compartment parts of motor vehicles, such as in particular dashboards equipped with visible airbags (with separate flaps) or integrated airbags (also known as airbags invisible to the driver and passengers) , central consoles and cladding or door panels.
• the invention also relates to the process for producing these compositions, in particular in the form of powders obtained by mixing.
• PRIOR ART It is known in the technical field of manufacture of motor vehicle dashboards, to use the skins thereof conventionally made in particular by hot-powder powder flow molding technique, either by rotomolding or by "slush-molding" (abbreviated slush) or slugging.
• These dashboards generally include an external "skin” imitation leather that gives the appearance (especially the color, the pattern, the appearance to the touch);
• the main materials used are thermoplastic resins such as polyvinyl chloride (PVC), thermoplastic polyurethanes (TPU), and thermoplastic polyolefins (TPO).
• PVC polyvinyl chloride
• TPU thermoplastic polyurethanes
• TPO thermoplastic polyolefins
• a foam-based material usually made of polyurethane or expanded PVC, is used as a sub-layer to provide flexibility properties and sound and thermal insulation.
• the outer skin is subjected to external aggressions: scratches, UV radiation, temperature, solvents, etc.
• the "skin" can be made to provide particular properties of appearance, in particular: decoration, color, touch or resistance to aging or abrasion.
• monolayer or multilayer skins must comply with the specifications of motor vehicle manufacturers, in particular the requirements for integrated air bag opening or no, that is to say the opening in a very short time without projection of particles for temperatures conventionally between -40 0 C and + 80 0 C.
• composition A comprising at least one plasticizer and optionally one or more modifying agents, chosen in particular from coloring pigments or decorative flakes,
• composition B comprising a thermoplastic resin
• the invention relates to a composition based on thermoplastic resins with a speckled appearance comprising:
• thermoplastic resin from 10 to 99% by weight of a compound called ("matrix” of a thermoplastic resin of polyvinyl chloride resin (PVC), from 0.5 to 90% by weight of at least one compound called “inclusion” a thermoplastic resin containing at least one coloring pigment,
• matrix of a thermoplastic resin of polyvinyl chloride resin (PVC)
• inclusion a thermoplastic resin containing at least one coloring pigment
• flecking agents chosen from coloring pigments, metal particles or decorative flakes, glass beads, polymeric particles.
• the invention relates to a process for obtaining a composition with a mottled appearance comprising the following steps: a first step of producing a compound based on PVC resin called “matrix”, a second step of producing one or more compounds based on PVC resin called “inclusion”, by mixing at least one coloring pigment with the PVC resin, a so-called “mouchetage” (or “sanding") step, which consists of mixing the "matrix” compound (s) with the compound (s) at the appropriate rate (s)
• the invention relates to a composition obtained by the preceding method.
• the invention also relates to the use of the composition described above for the manufacture of a layer of a monolayer or multilayer skin with speckled appearance for the passenger compartment parts of motor vehicles.
• the invention relates to a method for producing a skin of a skin layer of a dashboard comprising: depositing the composition defined above on the surface of a mold of shape and ,
• composition according to the invention is a composition according to the invention.
• the invention relates to a composition based on thermoplastic resins, for producing a layer of a monolayer or multilayer skin, with a speckled effect, in particular by "slush molding", characterized in that it comprises:
• thermoplastic resin containing at least one coloring pigment from 0.5 to 20% by weight of speckling agents chosen from coloring pigments, metallic particles or decorative flakes, glass beads or polymeric particles.
• the percentage of inclusion compounds and fluffing agents may, for example, be in the range of 1 to 50% by weight of the composition.
• the compound called "matrix” essentially comprises a thermoplastic resin chosen from polyvinyl chloride (PVC) or a mixture of PVC and a compatible polymer selected from copolymers or terpolymers vinyl chloride and vinyl acetate (VC / VA) or vinyl chloride and acrylic derivative (VC / DA), thermoplastic polyurethanes (TPU), thermoplastic polyetheresters, ethylene / vinyl monomer (EVA) copolymers, ethylene / vinyl monomer / carbonyl terpolymers, melt-processable acrylic elastomers, polyamide block and polyether block copolymers or polyether block copolymers, chlorinated or chlorosulfonated polyethylenes, ethylene polymers alkyl (meth) acrylate or functionalized or non-functionalized (meth) acrylic acid, MBS core-shell polymers, SBM block terpolymers, PVDF and polyamide powder resins.
• the thermoplastic resin used is
• the thermoplastic resin is polyvinyl chloride (PVC) obtained by a suspension or micro-suspension process, but emulsion or bulk PVC can also be used.
• PVC polyvinyl chloride
• An example of VC / VA copolymer is Lacovyl® from Arkema
• an example of VC / DA copolymer is Vinnolit® from Vinnolit
• an example of TPU is Goodrich's Estane®
• an example of thermoplastic polyetherester is DuPont's Hytrel®
• an example of polyetherblockamide is Pebax® from Arkema
• EVA Evatane® from Arkema
• an example of ethylene / vinyl monomer / carbonyl terpolymer is Elvaloy® from DuPont
• examples of ethylene / alkyl (meth) acrylate or acidic polymers (Meth) acrylic functionalized or otherwise are Lotryl®, Lotader® and Orevac® from
• thermoplastic resins include PVC resins and copolymers or terpolymers vinyl chloride and vinyl acetate (VC / VA) or vinyl chloride and acrylic derivative (VC / DA), as well as PVC resins and thermoplastic polyurethanes (TPU). These different resins can be mixed together in large proportions.
• the “matrix” compound may also comprise at least one additive chosen from plasticizers, heat stabilizers or UV stabilizers, antioxidants, processing additives, lubricants, fillers and color pigments called hereinafter matrix pigments.
• the plasticizer (s) used is (are) of monomeric and / or polymeric nature, and is (are) chosen (s) in particular from azelates, trimellitates, sebacates, adipates, polyadipates, phthalates, polyphthalates, citrates, benzoates, tallates, glutarates, fumarates, maleates, oleates, palmitates and acetates.
• the compound "Matrix" according to the invention also relates to mixtures of polymeric plasticizer (s) and monomeric plasticizer (s), as described above, in very large proportions.
• the weight ratio of the plasticizers and the resin is at least 60/100.
• thermal stabilizing agent mention may be made, by way of example, of metal salts, in particular those of calcium, zinc and tin; complexes based on aluminum, potassium or sodium.
• the anti-UV agents may be chosen from benzotriazoles and cyanoacrylates.
• the coloring pigments used can be both organic and mineral. By way of example, mention may be made of titanium dioxide, CIBA cromo BRN red pigment, GLSM blue pigment, BRM yellow lime and GL thiosol orange.
• the coloring pigments, the fillers, the lubricants, the UV stabilizers, the thermal stabilizers, the processing additives and the antioxidants at levels preferably comprised between 3 and 10% by weight. weight relative to the thermoplastic resin.
• the compound “inclusion” comprises at least:
• thermoplastic resin chosen from polyvinyl chloride (PVC) or a mixture of PVC and a compatible polymer chosen from copolymers or terpolymers vinyl chloride and vinyl acetate (VC / VA) or vinyl chloride and acrylic derivative ( VC / DA), thermoplastic polyurethanes (TPU), thermoplastic polyetheresters, ethylene / vinyl monomer copolymers
• thermoplastic resin of the "inclusion” compound may be identical in nature or different from the "matrix” compound.
• the compound "inclusion” may further comprise at least one additive selected from plasticizers, thermal stabilizers or UV stabilizers, antioxidants, processing additives, lubricants or fillers.
• additives selected from plasticizers, thermal stabilizers or UV stabilizers, antioxidants, processing additives, lubricants or fillers.
• the speckling (or middling) agents according to the invention are chosen to obtain special effects on the finished product, such as pearlescent, metallized, phosphorescent, fluorescent, thermochromic, interferential, granular or special touch effects, such as soft touch. They have a size in the range of 40 to 200 microns, and more preferably in the range of 50 to 120 microns. They are chosen from coloring pigments, metallic particles or decorative flakes, glass beads or polymeric particles.
• the subject of the invention is also the process for preparing the composition according to the invention for obtaining a composition in the form of a powder (in particular a plasticized PVC compound) convertible in particular by conventional slush-molding techniques. ", For the production of" skins "intended for parts of the passenger compartment of motor vehicles.
• the process according to the invention for the preparation of the above composition :
• the process according to the invention for obtaining a composition with a mottled appearance comprises the following steps:
• a first step of producing a compound based on PVC resin called a “matrix” as defined above
• a so-called “mouchetage” (or “pinching” or “sanding”) step which consists of mixing the "matrix” compound (s) at the appropriate rate with the "inclusion” compound (s), and with one or more flecking agents, chosen from coloring pigments, metal particles, glass beads, polymeric particles, preferably of density equivalent to that of the material constituting the matrix.
• the different steps are carried out using the appropriate tooling, according to a specific and usual mixing method, and with the appropriate implementation parameters.
• the production of “matrix” and “inclusion” compounds is well known to those skilled in the art. These “matrix” and “inclusion” compounds are presented under the powder form with a well-defined density (on average the density of a PVC resin compound is 1.20 g / cm 3 ), with an average particle size of between 100 and 200 ⁇ m and having a flowability adapted to the "slush-molding" process , implemented for obtaining skins.
• the flecking agents and the inclusion compound (s) are preferably of density equivalent to the "matrix” compound.
• the percentage of inclusion compounds and fluffing agents may, for example, be in the range of 1 to 50% by weight of the composition, depending on the desired effect.
• the present invention also relates to the use of the composition according to the invention, for obtaining a layer of skin or composite structure, for the parts of the passenger compartment of motor vehicles, such as the dashboards, central consoles and cladding or door panels.
• the subject of the present invention is a process for producing a monolayer or multi-layered skin layer (composite structure), in particular for a dashboard, comprising depositing the composition defined above on the surface of a mold of a shape. and melting said composition placed in the mold so that it is transformed into a flexible object which is removed from the mold.
• This composition can be deposited on the mold according to the usual molding techniques such as rotomolding and "slush molding” or sludging.
• the method used is the fogging.
• the skin layers or composite structure obtained according to the invention have a beautiful speckled appearance. They have a controlled heterogeneity of hue, and effect.
• the following examples illustrate the invention without, however, limiting its scope.
• Example 1 embodiment of a color speckled composition with glass beads according to the invention An industrial sample of the order of 200 kg of powder for "slush molding" in a defined color and named “Bordeaux Salocation” is prepared. This color consists of a PVC Bordeaux color, mottled (or mottled or sandblasted) by a beige PVC powder.
• Step 1 Production of the matrix PVC powder ("matrix” compound) for "slush molding” of Bordeaux color according to the conventional compounding method.
• additives including coloring pigments: 10. (6 different pigments used).
• Step 2 Production of the PVC inclusion powder for "slush molding",
• the percentage by weight of the various components is identical to that of step 1, only the nature and the amount of the coloring pigments changes.
• the control of the major properties of the powder gives substantially the same values as for step 1 except for the color.
• Step 3 spotting of the Bordeaux powder by an amount of between 5 and 7 phr (parts per cent of resin), ie 7% of the composition, of beige powder, and 2.5 phr of glass beads with a diameter of between 90 and 100 microns sold by the company Sovitec under the reference AG 215 in order to achieve the effect defined by the customer.
• the control of the flowability of the powder gives a value of 40 seconds and the visual evaluation of the effect obtained is carried out.
• FIG. 1 shows the appearance of the powder obtained after mixing and before the treatment
• Figure 2 shows the speckled appearance of the skin obtained after the "slush molding” treatment of the powder in a mold.
• the differences in color are due in particular to the grain on the surface of the mold and to the "slush molding" process, in particular the heating of the mold.
• Each of the powders A, B and C has a composition similar to that of the powders of Example 1. Successive blending is carried out with the white powder ("Matrix" compound) forming the matrix, the various inclusion beige, gray (inclusion compound) powders and the black staining pigment (speckling agent).
• white powder (“Matrix" compound) forming the matrix
• inclusion beige, gray (inclusion compound) powders and the black staining pigment (speckling agent).
• A 33 phr of indigo blue PVC matrix powder (5 different pigments used), B: 33 pcr of burgundy inclusion PVC powder, - C: 33 pcr of clear gray inclusion PVC powder, and
• Each of the powders A, B and C has a composition similar to that of the powders of Example 1.
• the successive blends are carried out with the blue powder (compound “matrix”) forming the matrix, the various powders inclusion burgundy, gray (compound “Inclusion”) and metal particles (fluffing agents).

Applications Claiming Priority (2)

Publications (1)

Family

ID=36580012

Family Applications (1)

Country Status (5)

Families Citing this family (11)

Family Cites Families (14)

• 2007
  • 2007-03-07 US US12/281,203 patent/US20110241254A1/en not_active Abandoned
  • 2007-03-07 JP JP2008557809A patent/JP2009529083A/ja active Pending
  • 2007-03-07 WO PCT/FR2007/050890 patent/WO2007101968A2/fr active Application Filing
  • 2007-03-07 CN CNA2007800168693A patent/CN101443408A/zh active Pending
  • 2007-03-07 EP EP07731706A patent/EP1991615A2/de not_active Withdrawn

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events