Classifications

• • 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
  • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
  • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
  • B29C70/06—Fibrous reinforcements only
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
  • C08G18/40—High-molecular-weight compounds
  • C08G18/62—Polymers of compounds having carbon-to-carbon double bonds
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
  • C08J5/24—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
  • C08L75/04—Polyurethanes
  • C08L75/14—Polyurethanes having carbon-to-carbon unsaturated bonds
• • 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
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
  • Y02B10/00—Integration of renewable energy sources in buildings
  • Y02B10/30—Wind power
• • 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
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
• • 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
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
  • Y10T442/2762—Coated or impregnated natural fiber fabric [e.g., cotton, wool, silk, linen, 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
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
  • Y10T442/2861—Coated or impregnated synthetic organic fiber fabric
• • 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
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
  • Y10T442/2926—Coated or impregnated inorganic fiber fabric
  • Y10T442/2984—Coated or impregnated carbon or carbonaceous fiber fabric
• • 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
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
  • Y10T442/2926—Coated or impregnated inorganic fiber fabric
  • Y10T442/2992—Coated or impregnated glass fiber fabric

Definitions

• Uretdions be thermosetting crosslinked
• the invention relates to a process for the preparation of storage-stable polyurethane prepregs and moldings produced therefrom (composite components). For the production of
• Prepregs or components are mixed (meth) acrylate monomers, (meth) acrylate polymers, hydroxy-functionalized
• This mixture or solution is applied by known methods to fibrous material, e.g. Carbon fibers, glass fibers or polymer fibers
• Initiators may also include other known room temperature curing systems, such as e.g. Permaleinate systems are used.
• thermoplastics or thermoplastic prepregs that can be subsequently deformed.
• the hydroxy-functionalized acrylate constituents can then be combined with those already present in the system
• Uretdions are cross-linked by increased temperature. In this way, dimensionally stable thermosets or networked composite components can be produced. Fiber reinforced prepreg materials are already being used in many industrial applications because of their ease of handling and increased processing efficiency compared to the alternative wet-lay-up technology.
• reaction transfer molding (RTM) process involves
• Crosslinking of the resin typically by heat.
• crosslinking matrix systems include polyurethane resins, which, because of their toughness, damage tolerance and strength, are used in particular for the production of composite profiles via pultrusion processes.
• the drawback is often the toxicity of the used
• Emulsions are used with such small polymer particles that a Einzelmaschineumhüllung is made possible.
• the polymers of the particles have a viscosity of at least 5000 centipoise and are either thermoplastics or
• Thermoplastics for the production of prepregs are Thermoplastics for the production of prepregs.
• Prepregs with a matrix based on 2-component polyurethanes (2-K-PUR) are also known.
• Category of 2-K-PUR essentially comprises the
• MDI Methylene diphenyl diisocyanates
• compositions as well as in their properties largely analog 2K systems.
• the same solvents, pigments, fillers and auxiliaries are used.
• these systems do not tolerate moisture before being applied for stability.
• a process for the preparation of storage-stable prepregs essentially composed of A) at least one fiber-shaped carrier and B) at least one reactive
• the systems can also poly (meth) acrylates as
• Cobinder or polyol component have.
• compositions are incorporated into the fibrous material by a direct melt impregnation process.
• DE 102010030234.1 by pretreatment with solvents.
• Disadvantage of these systems is the high melt viscosity or the use of solvents, which must be removed in the meantime, or may also bring disadvantages in terms of toxicology. Issue
• the object of the present invention in the background of the prior art was to provide a new prepreg technology which enables a simpler process for the preparation of easily handled, that is non-toxic, prepreg systems.
• Matrix materials is low enough to wetting the fiber-shaped carrier with sufficient fiber volume fraction in the manufacture of the composite component
• Component segments can be prevented.
• the semi-finished products are stable in storage at room temperature.
• the resulting moldings have a, compared to other polyurethane systems, increased heat resistance. Compared to common ones
• a prepreg is usually a precursor for thermoset composite components.
• An organic sheet is usually a precursor for thermoplastic composite components.
• the polymer composition is composed essentially of a hydroxy, amine and / or
• Isocyanate component containing internally blocked and / or blocked with blocking agents di- or polyisocyanates together.
• the resin component 1 contains 20 to 70% by weight of monomers and 10% by weight to 50% by weight of prepolymers.
• Resin component 1 to the isocyanate component between 90 to 10 and 50 to 50.
• the resin component 1 and the isocyanate component are present in such a proportion to each other that the hydroxyl group of the
• Resin component 1 0.3 to 1.0, preferably 0.6 to 0.9, particularly preferably 0.45 to 0.55 uretdione groups and / or externally blocked isocyanate groups of the isocyanate component omitted.
• resin component 1 is at least
• At the same time contains resin component 2 - based on the amounts of the resin component 1 - 0.5 to 7.0% by weight of initiator, preferably a peroxide.
• resin component 1 is at least composed of
• initiator preferably a peroxide
• Initiator preferably dilauroyl peroxide, permaleinates and / or dibenzoyl peroxide and the accelerator to a tertiary, aromatic substituted amine.
• urethane (meth) acrylates may be present.
• the polymer compositions used according to the invention provide a very good flow with low viscosity and thus a good impregnation and in the cured state excellent chemical resistance.
• aliphatic crosslinkers eg IPDI or H 12 MDI
• the inventive use of the functionalized poly (meth) acrylates also good weather resistance is achieved.
• the composite semifinished products according to the invention are furthermore very stable on storage at room temperature conditions, generally several weeks and even months. They can thus be further processed into composite components at any time. This is the essential difference from the prior art systems which are reactive and not shelf-stable, as they start immediately after application e.g. to
• the storable composite semi-finished products can be further processed to composite components at a later date.
• the composite Semi-finished products is a very good impregnation of the fiber-shaped carrier, thereby causing the liquid
• Resin components containing the isocyanate component which wet the fiber of the carrier very well, whereby the thermal stress of the polymer composition leading to an incipient second crosslinking reaction is avoided by a prior homogenization of the polymer composition. Furthermore, the process steps of grinding and sieving into individual particle size fractions are eliminated. so that a higher yield of impregnated fiber-shaped carrier can be achieved.
• Composite semifinished products is that the high temperatures, as in the melt impregnation process or in the
• Polyurethane compositions are needed at least for a short time, not in this inventive method
• the invention is in addition to the composite semifinished products or prepregs, a process for producing these composite semi-finished products or prepregs and their
• Process step I can be done, for example, by simply stirring the three components together. After combining the resin components 1 and 2, they should within 45 min, preferably within 30 min and more preferably within 15 min in
• Process step II Be further processed.
• Process step II the impregnation, is carried out by soaking the fibers, fabrics or scrims with the in
• Process step 1 prepared formulation.
• the impregnation is carried out at room temperature.
• Process step III. takes place directly after
• Process step II The curing can by
• the composite semifinished products / prepregs produced according to the invention have a very high storage stability at room temperature after process steps III or IV. This is depending on the contained reactive
• Polyurethane composition at least a few days at room temperature.
• the composite semi-finished products are at 40 ° C and below, as well as at several weeks
• reactive or highly reactive polyurethane compositions used according to the invention have very good adhesion and distribution on the fibrous carrier.
• step V the final curing of the composite semifinished products takes place to form parts which are thermoset crosslinked. This is done by a thermal
• step V the composite semi-finished products in a suitable form under pressure and, where appropriate
• Polyurethane compositions offer a very good
• Isocyanate component may be at 100 to 160 ° C
• Curing temperature not only saves energy and curing time, but it can also be many
• Uretdione group-containing polyurethane compositions at temperatures of 100 to 160 ° C, depending on the nature of the carrier cure. Preferably, this is
• the polyurethane composition used according to the invention is within 5 to 60 minutes.
• the carrier material in the composite semifinished product is characterized in that the fiber-shaped carrier mostly glass, carbon, plastics, such as polyamide (aramid) or polyester, natural fibers, or mineral
• Fiber materials such as basalt fibers or ceramic fibers exist.
• the fiber-shaped carrier lie as a textile fabric of nonwoven, knitted fabric, knitted fabric and
• Knitted fabrics such as fabrics, scrims or braids, as long-fiber or short-fiber materials.
• the fibrous carrier in the present invention consists of
• fibrous material also commonly called reinforcing fibers.
• any material that makes up the fibers is suitable, but preferably fibrous material made of glass, carbon, plastics, such.
• polyamide (aramid) or polyester natural fibers or mineral fiber materials such as basalt fibers or ceramic fibers (oxide fibers based on
• Aluminas and / or silicas are also mixtures of fiber types, e.g. Fabric combinations of aramid and glass fibers, or carbon and
• Glass fibers can be used.
• hybrid composite components with prepregs of different fibrous carriers can be produced.
• Glass fibers are the most commonly used fiber types mainly because of their relatively low price.
• Reinforcing fibers suitable (E-glass, S-glass, R-glass, M-glass, C-glass, ECR-glass, D-glass, AR-glass, or Hollow glass fibers).
• Carbon fibers are generally used in high performance composites, where lower density relative to glass fiber and high strength are also important factors.
• Carbon fibers are industrially produced carbon-containing fibers
• Fibers have only low strength and less technical importance, anisotropic fibers show high
• Natural fibers are here all textile fibers and fiber materials referred to, which are derived from vegetable and animal material (for example, wood, cellulose, cotton, hemp, jute, linen, sisal, bamboo fibers). Similar to carbon fibers, aramid fibers have a negative coefficient of thermal expansion, ie become shorter when heated. Their specific strength and elastic modulus are significantly lower than those of carbon fibers. In conjunction with the positive
• Expansion coefficients of the matrix resin can be finished high dimensional components. Compared to carbon fiber reinforced plastics is the compressive strength of
• Aramid fiber composites significantly lower.
• Known brand name for aramid fibers are Nomex ® and Kevlar ® from DuPont, or Tei Inconex ®, Twaron ® and Technora ® from DuPont, or Tei Inconex ®, Twaron ® and Technora ® from DuPont, or Tei Inconex ®, Twaron ® and Technora ® from DuPont, or Tei Inconex ®, Twaron ® and Technora ® from DuPont, or Tei Inconex ®, Twaron ® and Technora ® from DuPont, or Tei Inconex ®, Twaron ® and Technora ® from DuPont, or Tei Inconex ®, Twaron ® and Technora ® from DuPont, or Tei Inconex ®, Twaron ® and Technora ® from DuPont, or Tei Inconex ®, Twaron ®
• Particularly suitable and preferred are carriers of glass fibers, carbon fibers, aramid fibers or
• the fibrous material is a textile fabric. Suitable are textile fabrics made of nonwoven, as well as so-called
• Knitted fabric such as knitted fabrics and knits, but not synonymous meshed containers such as fabrics, scrims or braids.
• Short fiber materials as a carrier. Also suitable according to the invention are rovings and yarns. All materials mentioned are suitable in the context of the invention as a fibrous carrier. An overview of reinforcing fibers can be found in "Composites Technologies", Paolo Ermanni (Version 4), Script for the lecture ETH Zurich, August 2007, Chapter 7. Isocanate component
• the diisocyanates and polyisocyanates used according to the invention may be selected from any aromatic, aliphatic,
• the polyisocyanates used according to the invention are externally blocked in a first embodiment.
• external blocking agents as can be found for example in DE 102010030234.1.
• the preferred external blocking agents as can be found for example in DE 102010030234.1.
• Blocking agents are selected from
• the isocyanate components are present with an internal block.
• the internal blocking takes place via a dimer formation via uretdione structures, which at elevated temperature returns to the originally present isocyanate structures
• Uretdione group-containing polyisocyanates are well known and are described, for example, in US 4,476,054, US 4,912,210, US 4,929,724 and EP 417,603. A comprehensive overview of industrially relevant processes for
• Dimerization of isocyanates to uretdiones provides J. Prakt. Chem. 336 (1994) 185-200. In general, the reaction of isocyanates to uretdiones in the presence of soluble dimerization catalysts such. B.
• the reaction - optionally carried out in solvents, but preferably in the absence of solvents - is achieved when a desired
• Uretdione group-containing polyisocyanates a wide range of isocyanates suitable.
• the above di- and polyisocyanates can be used. Preference is given both for the imple mentation form of the externally blocked isocyanates and for the imple mentation form of Urestdione di- and polyisocyanates of any
• IPDI isophorone diisocyanate
• HDI Hexamethylene diisocyanate
• H 1 2MD I Diisocyanatodicyclohexylmethane (H 1 2MD I), 2-methylpentane diisocyanate (MPDI), 2,2,4-trimethylhexamethylene diisocyanate / 2,4,4-trimethylhexamethylene diisocyanate (TMDI),
• NBDI Norbornane diisocyanate
• IPDI and HDI are used for the matrix material.
• the reaction of these polyisocyanates containing uretdione groups with uretdione group-containing curing agents a) involves the reaction of the free NCO groups with hydroxyl-containing monomers or polymers, e.g. Polyesters, polythioethers, polyethers,
• Preferred uretdione hardeners a) have a free NCO content of less than 5% by weight and a content of uretdione groups of 3 to 25% by weight, preferably 6 to 18% by weight (calculated as C2 2O2, molecular weight 84). Preference is given to polyesters and monomeric dialcohols. Except the uretdione groups, the hardeners may also have isocyanurate, biuret, allophanate, urethane and / or urea structures. Optionally, the isocyanate components may contain additional 0.1 to 5.0 weight percent catalysts. These are organometallic catalysts, such as. B.
• Dibutyltin dilaurate DBTL
• Zinnoctoat bismuth neodecanoate
• tertiary amines such as.
• 1,4-diazabicyclo [2.2.2. ] octane in amounts of 0.001-1% by weight.
• the isocyanate component is below 40 ° C in solid form and above 125 ° C in liquid form.
• the isocyanate component further known from polyurethane chemistry auxiliaries and additives
• the isocyanate component has a free NCO content of less than 5% by weight and a uretdione content of from 3 to 25% by weight.
• the isocyanate composition of this embodiment can be 0.1 to 5% by weight, preferably 0.3 to
• Tetralkylammonium salts and / or quaternary
• Phosphonium salts with halogens, hydroxides, alcoholates or organic or inorganic acid anions as
• the isocyanate component may additionally contain from 0.1 to 5.0% by weight of at least one co-catalyst.
• epoxides are used as co-catalysts.
• Glycidyl ethers and glycidyl esters aliphatic epoxides, diglycidyl ethers based on bisphenol A and glycidyl methacrylates.
• epoxides are triglycidyl isocyanurate (TGIC, trade name ARALDIT 810, Huntsman), mixtures of terephthalic acid diglycidyl ester and trimellitic triglycidyl ester (trade name ARALDIT PT 910 and 912, Huntsman), glycidyl ester of versatic acid
• ECC diglycidyl ether based on bisphenol A (trade name EPIKOTE 828, Shell) ethylhexyl glycidyl ether,
• Tin acetylacetonate alone or in mixtures.
• Zinc acetylacetonate is preferably used.
• Phosphonium acetylacetonates in question examples of this can be found in DE 102010030234.1. Particularly preferred
• Tetrabutylammonium acetylacetonate used.
• Catalysts are used.
• both the rate of the crosslinking reaction in the production of the composite components and the properties of the matrix can be varied within wide limits.
• the isocyanate component may also contain other auxiliaries and additives known from polyurethane chemistry.
• Resin Components according to the invention 2K-
• Methacrylate-based reaction resins consisting of a first and a second resin component used.
• the first resin component used according to the invention has the following composition:
• Monomers preferably (meth) acrylates and / or components copolymerizable with (meth) acrylates,
• auxiliaries and additives in addition regulators, plasticizers, stabilizers and / or inhibitors can be used.
• the first resin component may contain the following additional constituents:
• crosslinker preferably selected from the group of
• urethane (meth) acrylates Decisive for the present invention is that the monomers and / or prepolymers of resin component. 1
• functional groups are hydroxyl groups, amino groups and / or
• the resin component 1 in this case has an OH number of 10 to 100, preferably from 20 to 500 mg, more preferably from 20 to 150 mg KOH / gram.
• the amount of the functional groups is chosen so that for each functional group of the
• Isocyanate component is omitted.
• the second resin component consists of a mixture containing one or more initiators. Based on the first resin component, these are 0.1% by weight to 10% by weight, preferably 0.5% by weight to 7% by weight and particularly preferably 1% by weight to 5% by weight of initiator. In general, the peroxide is in the second resin component with a
• Diluent for example, added with a phthalate such as dibutyl phthalate, an oil or other plasticizer.
• the polymerization initiators are in particular peroxides or azo compounds. Under certain circumstances, it may be advantageous to use a mixture of different initiators.
• halogen-free peroxides such as permalates, dilauroyl peroxide, dibenzoyl peroxide, tert-butyl peroctoate, Di (tert-butyl) peroxide (DTBP), di (tert-amyl) peroxide (DTAP), tert-butyl peroxy (2-ethylhexyl) carbonate (TBPEHC) and other high temperature decomposing peroxides
• Free radical initiator use is Especially preferred
• Initiators are dilauroyl peroxide or dibenzoyl peroxide.
• a particular embodiment of a redox initiator system for the initiator-containing reaction resin component is the combination of peroxides and accelerators,
• amines which are usually contained in resin component 1.
• Suitable amines include, for example, tertiary aromatic-substituted amines, in particular N, N-dimethyl-p-toluidine, ⁇ , ⁇ -bis (2-hydroxyethyl) -p-toluidine or N, N-bis (2-hydroxypropyl) called p-toluidine.
• the reaction resin according to the invention may contain up to 7% by weight, preferably up to 5% by weight and most preferably up to 3% by weight of an accelerator.
• the accelerator is in the second
• the initiator e.g. the peroxide
• the monomers contained in the reaction resin are compounds selected from the group of (meth) acrylates, such as, for example, alkyl (meth) acrylates of straight-chain, branched or cycloaliphatic
• Alcohols with 1 to 40 carbon atoms such as
• additional monomers having a further functional group such as ⁇ , ⁇ -unsaturated mono- or dicarboxylic acids, for example acrylic acid, methacrylic acid or itaconic acid esters of acrylic acid or methacrylic acid with dihydric alcohols, for example hydroxyethyl (meth) acrylate or hydroxypropyl ( meth) acrylate; Acrylamide or methacrylamide; or dimethylaminoethyl (meth) acrylate.
• Further suitable constituents of monomer mixtures are, for example, glycidyl (meth) acrylate or silyl-functional
• the monomer mixtures may also contain other unsaturated monomers
• Reaction resin are the crosslinkers. These are, in particular, polyfunctional methacrylates, such as
• Allyl (meth) acrylate are di- or tri- (meth) acrylates such as, for example, 1,4-butanediol di (meth) acrylate,
• Trimethylolpropane tri (meth) acrylate Trimethylolpropane tri (meth) acrylate.
• composition of the monomers according to proportion and composition is expediently in view of the desired technical function and the
• the monomer content of the reaction resin is between 20% by weight and 70% by weight, preferably between 30% by weight and 60% by weight and particularly preferably between 30% by weight and 40% by weight.
• Resin component 1 is so-called MO-PO systems.
• these also contain polymers which are referred to as prepolymers for better distinctness within the scope of this patent, preferably polyesters or poly (meth) acrylates.
• Prepolymer content of the reaction resin is between 10% by weight and 50% by weight, preferably between 15% by weight and 40% by weight.
• Both the polyesters and the poly (meth) acrylates may have additional functional groups for adhesion promotion or for copolymerization in the crosslinking reaction, for example in the form of double bonds.
• the prepolymers hydroxy, amine or
• Said poly (meth) acrylates are generally composed of the same monomers as they already are
• Substance or precipitation polymerization are recovered and are added to the system as a pure substance.
• polyesters are obtained in bulk via polycondensation or ring-opening polymerization and are composed of the components known for these applications
• UV stabilizers can be used.
• the UV stabilizers can be used.
• Cinnamic acid ester derivatives Cinnamic acid ester derivatives.
• Substituted phenols, hydroquinone derivatives, phosphines and phosphites are preferably used from the group of stabilizers or inhibitors.
• rheology additives are preferably
• Polyhydroxycarbonklareamide urea derivatives, salts of unsaturated carboxylic acid esters, alkyl ammonium salts of acidic phosphoric acid derivatives, ketoximes, amine salts of p-toluenesulfonic acid, amine salts of sulfonic acid derivatives and aqueous or organic solutions or mixtures of
• Rheology additives based on pyrogenic or precipitated, optionally silanized, silicas having a BET surface area of 10 to 700 nm 2 / g are particularly suitable.
• Defoamers are preferably selected from the group of alcohols, hydrocarbons, paraffin-based
• Composite semi-finished products have other additives.
• sunscreen agents such as e.g. sterically hindered amines, or other adjuvants, such as. As described in EP 669 353, be added in a total amount of 0.05 to 5 wt%.
• Fillers and pigments such as Titanium dioxide may be added in an amount of up to 30% by weight of the total composition.
• polyurethane compositions can be any suitable polyurethane compositions.
• polyurethane compositions can be any suitable polyurethane compositions.
• Additives such as leveling agents, e.g. Polysilicones, or coupling agents, e.g. acrylate-based, can be added.
• additional catalysts for the second curing may be contained in the composite semifinished products according to the invention. It is about
• organometallic catalysts e.g.
• Dibutyltin dilaurate zinc octoate, bismuth neodecanoate, or tertiary amines such.
• 1,4-diazabicyclo [2.2.2. ] octane in amounts of 0.001-1.0% by weight.
• variant I usually cured from about 180 ° C and designated as variant I.
• Reactive (variant I) means in the context of this invention that the second curing takes place at temperatures from 160 ° C, depending on the nature of the carrier.
• the second curing takes place under normal conditions, for example with DBTL catalysis, from 160 ° C, usually from about 180 ° C.
• the time for the second cure is usually within 5 to 60 minutes.
• the invention is also the use of
• Prepregs in particular with fibrous carriers of glass, carbon or aramid fibers.
• the invention also relates to the use of the prepregs according to the invention, for the production of composites in boat and shipbuilding, in the air and
• the invention also relates to the
• Prepregs produced molded parts or composite components, composed of at least one fibrous support and at least one crosslinked reactive composition,
• Reactive composition containing a (meth) acrylate resin as a matrix.

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• 2011
  • 2011-12-01 WO PCT/EP2011/071450 patent/WO2012093006A1/de not_active Ceased
  • 2011-12-01 CA CA 2823770 patent/CA2823770A1/en not_active Abandoned
  • 2011-12-01 RU RU2013136330/05A patent/RU2013136330A/ru not_active Application Discontinuation
  • 2011-12-01 BR BR112013017258A patent/BR112013017258A2/pt not_active Application Discontinuation
  • 2011-12-01 ES ES11796946.9T patent/ES2589453T3/es active Active
  • 2011-12-01 US US13/978,059 patent/US9878500B2/en not_active Expired - Fee Related
  • 2011-12-01 MX MX2013007753A patent/MX2013007753A/es not_active Application Discontinuation
  • 2011-12-01 JP JP2013547830A patent/JP6092120B2/ja not_active Expired - Fee Related
  • 2011-12-01 KR KR1020137020559A patent/KR101853155B1/ko not_active Expired - Fee Related
  • 2011-12-01 EP EP11796946.9A patent/EP2661459B1/de not_active Not-in-force
  • 2011-12-01 CN CN201180064228.1A patent/CN103298862B/zh not_active Expired - Fee Related
• 2012
  • 2012-01-02 TW TW101100046A patent/TWI570169B/zh not_active IP Right Cessation

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