Classifications

• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
  • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
  • D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
  • D04H1/587—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives characterised by the bonding agents used
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
  • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
  • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
  • D04H1/4209—Inorganic fibres
  • D04H1/4218—Glass fibres
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
  • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
  • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
  • D04H1/4209—Inorganic fibres
  • D04H1/4242—Carbon fibres
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
  • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
  • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
  • D04H1/4326—Condensation or reaction polymers
  • D04H1/4334—Polyamides
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
  • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
  • D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
  • D04H1/60—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in dry state, e.g. thermo-activatable agents in solid or molten state, and heat being applied subsequently
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
  • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
  • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
  • D06M15/227—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of hydrocarbons, or reaction products thereof, e.g. afterhalogenated or sulfochlorinated
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
  • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
  • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
  • D06M15/227—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of hydrocarbons, or reaction products thereof, e.g. afterhalogenated or sulfochlorinated
  • D06M15/233—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of hydrocarbons, or reaction products thereof, e.g. afterhalogenated or sulfochlorinated aromatic, e.g. styrene
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
  • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
  • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
  • D06M15/263—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acids; Salts or esters thereof
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
  • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
  • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
  • D06M15/263—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acids; Salts or esters thereof
  • D06M15/273—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acids; Salts or esters thereof of unsaturated carboxylic esters having epoxy groups
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
  • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
  • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
  • D06M15/327—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated alcohols or esters thereof
  • D06M15/333—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated alcohols or esters thereof of vinyl acetate; Polyvinylalcohol
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
  • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
  • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • D06M15/55—Epoxy resins
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M23/00—Treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, characterised by the process
  • D06M23/08—Processes in which the treating agent is applied in powder or granular form

Definitions

• the invention relates to a method for prebinding fiber materials by means of a powdered binder composition.
• the invention further relates to the use of the prebound Fiber material for the production of molded plastic parts made of fiber-reinforced, unsaturated polyester resins or epoxy resins by laying out the pre-bonded fiber material, Soak the fiber material with the unsaturated polyester resin or epoxy resin and molding the molded part.
• UP resins unsaturated Polyester resins
• the textile structures into the molds draped and impregnated with the reaction resin the in of the fiber mat existing prebinder by the existing in the UP resin Styrene is dissolved or dissolved. Consequently the mats lose their inherent rigidity and become adapt better to the tool contours, while at the same time the impregnation of the fiber mats with the resin is accelerated becomes.
• thermoplastic materials have been used in the production process mentioned Polyester powder, in particular polyester powder based Bisphenol-A, used as a pre-binder for the fiber mats.
• polyester powder in particular polyester powder based Bisphenol-A
• the bisphenol A polyester powder is placed on a previously deposited one Sprinkled glass fleece and at the subsequent Furnace run melted, so that the glass fibers at their crossing points bound by the melted polymer powder become.
• the pre-bound glass mats then become Reinforcement of UP resins used.
• the prebinder is, for certain applications, insufficient kinetics of solubility in monomeric styrene.
• the main thing here is to minimize the fraying of the assembled fiber mat, the dimensional stability of an optionally preformed fiber mat to ensure and incompatibility between preform binders and to avoid injection resin.
• AU-A 36659/89 describes a process for the production of pre-bonded fiber materials in the glass fibers with two different Lengths with a triple combination as a binder which styrene-soluble polyester powder, Contains polystyrene powder and polyvinyl acetate dispersion.
• styrene-soluble binders are unsuitable Binder for the consolidation of fiber materials described, which is further processed with a thermoplastic melt become.
• Binder for this application the use of hydroxyl groups or polyacrylates containing carboxyl groups recommended, which by means of solvent or bulk polymerization getting produced.
• Emulsion polymers become explicit discouraged, as the surface-active contained therein Substances contaminate the binder and lead to undesirable side effects such as discoloration or thermal degradation.
• EP-A 894888 discloses textile binders based on carboxyl-functional ones Polymers, which in combination with Epoxy or isocyanate crosslinkers are used, known. On processes for the preparation of pre-bound, styrene-soluble Molded fiber parts are not received.
• the task was to use a powdery prebinder To provide, which is in a styrene-containing UP resin Solves as quickly as possible, but also for pre-binding in processes is suitable, especially for the compatibility of the previous binder with the polyester resin in the foreground.
• Another object of the invention is the use of pre-bonded fiber materials for the production of plastic molded parts made of fiber-reinforced, unsaturated polyester resins by laying out the pre-bound fiber material, Soak the fiber material with the unsaturated polyester resin and molding the molded part.
• Another object of the invention is the use of pre-bonded fiber material for the production of preformed Preforming and the use of these preformed Fiber materials for the production of fiber reinforced Plastic molded parts made of reactive resins such as Epoxy resins.
• Suitable copolymers are those based on one or more monomers from the group comprising vinyl esters of unbranched or branched alkyl carboxylic acids 1 to 15 carbon atoms, methacrylic acid ester and acrylic acid ester of Alcohols with 1 to 10 carbon atoms, vinyl aromatics such as styrene and Vinyl chloride.
• Preferred vinyl esters are vinyl acetate, vinyl propionate, Vinyl butyrate, vinyl 2-ethylhexanoate, vinyl laurate, 1-methyl vinyl acetate, vinyl pivalate and vinyl ester of alpha-branched Monocarboxylic acids with 5 to 11 carbon atoms, for example VeoVa5 or VeoVa9.
• Preferred methacrylic acid esters or acrylic acid esters are methyl acrylate, methyl methacrylate, Ethyl acrylate, ethyl methacrylate, propyl acrylate, propyl methacrylate, n-butyl acrylate, n-butyl methacrylate, 2-ethylhexyl acrylate.
• the composition of the copolymer is chosen so that a glass transition temperature Tg or a melting point of greater than 35 ° C, preferably from 55 ° C to 150 ° C results.
• the glass transition temperature Tg and the melting point of the polymers can be determined in a known manner by means of differential scanning calorimetry (DSC).
• Tg n the glass transition temperature in degrees Kelvin of the homopolymer of the monomer n. Tg values for homopolymers are listed in Polymer Handbook 2nd Edition, J. Wiley & Sons, New York (1975).
• Vinyl ester copolymers, styrene copolymers are preferred and acrylic acid ester copolymers.
• Especially preferred copolymers are vinyl acetate / ethylene copolymers, Vinyl acetate / vinyl chloride-, vinyl acetate / VeoVa5-, Vinyl acetate / VeoVa9 copolymers, each of 0.01 to 25% by weight of the above-mentioned monomer units containing carboxyl groups contain, and the composition of which is chosen so that the above-mentioned glass temperatures Tg or melting points result.
• Methyl methacrylate / butyl acrylate are also particularly preferred.
• Suitable ethylenically unsaturated, carboxyl group-containing monomers are ethylenically unsaturated mono- or dicarboxylic acids such as acrylic acid, methacrylic acid, maleic acid, fumaric acid, itaconic acid.
• the content of carboxyl groups is preferably Comonomer units containing 0.01 to 10 wt .-%, based on the total weight of the copolymer.
• the copolymers 0.01 to 10.0 %
• the copolymers each 0.01 to 2 wt .-% acrylic acid and / or acrylamide.
• the copolymers are prepared in a manner known per se Way according to the emulsion polymerization process in Presence of emulsifier, as for example in WO-A 94/20661, the disclosure of which is part of the present application.
• To make the powder the resulting polymer dispersion is dried. Drying can be done by spray drying, drum drying, Freeze drying or by coagulation of the dispersion and subsequent Fluid bed drying take place. To be favoured spray drying and roller drying. Preferably done the preparation of the copolymer and its drying without Protection colloid added.
• Suitable crosslinkers are powdered compounds which contain two or more reactive groups with carboxylic acid groups form a covalent bond with a melting point from 40 ° C to 150 ° C.
• Compounds which are two or more reactive are preferred Groups from the group of epoxides, isocyanates or primides contain.
• Suitable epoxy crosslinkers are those from Bisphenol A type, i.e. condensation products of bisphenol A and epichlorohydrin or methylepichlorohydrin. Such Epoxy crosslinkers are commercially available, for example under the trade names Epicote or Eurepox available. Suitable diisocyanates are also common commercial products, for example m-tetramethylxylene diisocyanate (TMXDI), methylene diphenyl diisocyanate (MDI).
• TXDI m-tetramethylxylene diisocyanate
• MDI methylene diphenyl diisocyanate
• the crosslinker content is in general from 0.1 to 25% by weight, preferably from 4 to 12% by weight, based on the powdery copolymer.
• Combinations of the copolymer a) are usually and the crosslinker b) used. This is especially true for applications in which high mechanical strength is required. In contrast, in applications where styrene solubility is paramount can also be used without the addition of a crosslinker.
• the powder contains Binder composition still a crosslinking catalyst based on organic compounds, which are quaternary Groups of elements of the 5th main group of the PSE included.
• Triphenylphosphonium halides are also suitable with substituted alkyl radical such as 2-carboxyethyl, 3-bromopropyl or formylmethyl triphenylphosphonium bromide.
• Suitable quaternary ammonium compounds are tetrabutylammonium, Benzyltrimethylammonium, methyltributylammonium salts.
• the compounds mentioned are commercially available and are preferably obtained in amounts of 0.1 to 5% by weight on the powdery copolymer, used.
• polymers In applications where it depends on the melt flow characteristics arrives, have proven as polymers a) those which have a molecular weight Mw of 60,000 to 300,000.
• Mw molecular weight
• the molecular weight can be known in the art and Way by means of regulators, such as dodecyl mercaptan, during the polymerization can be set.
• the preparation of the powdered binder composition is done by mixing the powdered components in the specified mixing ratios.
• the known Devices for mixing powders are used.
• All fibers are customary as fiber material, usually used to reinforce fiber-reinforced plastics become. These include in particular glass fibers, polyamide fibers and carbon fibers.
• the polyamide fibers are aramid fibers prefers.
• the fiber materials can be used as single filaments or as yarns, so-called rovings, or as fleeces, tangles or scrim can be used.
• the fibers can both both individually and in the form of combinations with one another are used, for example in the form of blended yarns or blended fabrics.
• the powder composition is generally used for fiber binding in an amount of 1 to 50% by weight, preferably 4 to 15% by weight, particularly preferably 3 to 8 wt .-%, each based on the Fiber weight used.
• the molded parts or fabrics can be proceeded so that the fiber materials with the powder composition to be mixed and the mixture of fiber and powder before solidification by the usual methods nonwoven technology, for example by means of an air laying, Wet laying, direct spinning or carding device becomes.
• the fiber / powder mixture can optionally be carded become.
• temperature increase preferably to 130 ° C to 250 ° C, if necessary using Pressure and / or superheated steam bound the fiber material.
• the fiber-powder mixture can still be carded if necessary, or a fiber scrim, fabric or fleece is laid out.
• the powder mixture into the laid fiber material interspersed; powder spreaders, roller application systems and electrostatic spraying methods are preferred.
• the temperature by means of infrared radiation source or microwave, preferably to 130 ° C to 250 ° C, if necessary using pressure and / or superheated steam, the fiber material bound.
• the pre-bonded fiber materials available in this way are suitable itself as a semi-finished product for the production of fiber-reinforced Plastics, which is particularly characterized by a good and characterized by rapid solubility in styrene.
• this application is used to manufacture plastic molded parts from fiber-reinforced, unsaturated polyester resins the pre-bonded fiber material designed, then with the unsaturated polyester resin soaked and finally molded the molded part.
• Another preferred area of application is solidification of glass, aramid or carbon fiber mats in the form of laid or woven fabrics, mixed beds or mixed fabrics by means of the powder composition, analogous to the process description above can be worked.
• RTM Resin Transfer Molding
• SMC Sheet Molding Composites
• Monomer dosage 2 with 67.3 g water, 44.9 g acrylamide (30%).
• Initiator dosage with 217.6 g water and 6.7 g potassium peroxodisulfate. After the metered additions, the polymerization was continued at 80 ° C. for about 2 hours. After cooling and adjusting the pH to 8 using ammonia, the dispersion was spray-dried. The glass temperature of this product was 59 ° C.
• Monomer dosage 2 with 67.3 g water and 28.0 g N-methylolacrylamide (48%).
• Initiator dosage with 217.4 g water and 6.6 g potassium peroxodisulfate. After the metering, the polymerization was continued at 80 ° C. for about 2 hours. After cooling and adjusting the pH to 8 using ammonia, the dispersion was spray-dried. The glass temperature of this product was 59 ° C.
• a commercial polyester powder based on an unsaturated Esters A commercial polyester powder based on an unsaturated Esters.
• a commercial polyester powder based on a bisphenol A fumarate A commercial polyester powder based on a bisphenol A fumarate.
• a commercial polyester powder based on an unsaturated Bisphenol polyester is provided.
• Glass rovings were used to produce a glass fiber mat spread out on a carrier plate and evenly with a powder from the examples or comparative examples sprinkled.
• the powder application was 5% by weight in each case, based on the fiber weight.
• the carrier plate was used for solidification with the fiber / powder mixture for 3 minutes at 210 ° C heated, melting the powder, soaking the fibers and joined together at the crossing points. The so obtained Fiber mats showed no discoloration.
• the table shows that the procedure according to the invention is clear better styrene solubility is obtained than with conventional Preliminary ties.
• a carbon fiber fabric was laid out, grounded and the powder from example 1 by means of electrostatic spray application in an amount of 5 wt .-%, based on fiber weight, applied.
• the mat was pre-consolidated. Then the pre-consolidated Mat in a crimping tool into a hemispherical Formed.
• the pre-bound and pre-formed scrims or fabrics were dimensionally stable and can be easily integrated without loss of shape Transfer the appropriately shaped injection tool.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Inorganic Chemistry (AREA)
• Reinforced Plastic Materials (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

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Cited By (6)

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Citations (4)

• 1999
  • 1999-12-09 DE DE19959415A patent/DE19959415C2/de not_active Expired - Fee Related
• 2000
  • 2000-11-06 US US09/707,649 patent/US6472462B1/en not_active Expired - Fee Related
  • 2000-11-16 DE DE50003093T patent/DE50003093D1/de not_active Expired - Lifetime
  • 2000-11-16 EP EP20000124328 patent/EP1106724B1/fr not_active Expired - Lifetime

Patent Citations (4)

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