EP3071632A1 - Pièces façonnées à base de (méth)acrylates à fonctionnalité diène et de (hétéro)diénophiles de diels-alder, avec réticulation réversible - Google Patents

Pièces façonnées à base de (méth)acrylates à fonctionnalité diène et de (hétéro)diénophiles de diels-alder, avec réticulation réversible

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Publication number
EP3071632A1
EP3071632A1 EP14795819.3A EP14795819A EP3071632A1 EP 3071632 A1 EP3071632 A1 EP 3071632A1 EP 14795819 A EP14795819 A EP 14795819A EP 3071632 A1 EP3071632 A1 EP 3071632A1
Authority
EP
European Patent Office
Prior art keywords
component
composition
weight
composition according
meth
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP14795819.3A
Other languages
German (de)
English (en)
Inventor
Friedrich Georg Schmidt
Stefan Hilf
Michael Kube
Zuhal TUNCAY
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Evonik Operations GmbH
Original Assignee
Evonik Degussa GmbH
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Filing date
Publication date
Application filed by Evonik Degussa GmbH filed Critical Evonik Degussa GmbH
Publication of EP3071632A1 publication Critical patent/EP3071632A1/fr
Withdrawn legal-status Critical Current

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    • 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
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/10—Esters
    • C08F220/12—Esters of monohydric alcohols or phenols
    • C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
    • C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/02—Conditioning or physical treatment of the material to be shaped by heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/08—Conditioning or physical treatment of the material to be shaped by using wave energy or particle radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B15/00—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
    • B29B15/08—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
    • B29B15/10—Coating or impregnating independently of the moulding or shaping step
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/16—Cooling
    • 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
    • B29C70/28—Shaping operations therefor
    • B29C70/40—Shaping or impregnating by compression not applied
    • B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
    • B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
    • B29C70/48—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs and impregnating the reinforcements in the closed mould, e.g. resin transfer moulding [RTM], e.g. by vacuum
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2/00—Processes of polymerisation
    • C08F2/46—Polymerisation initiated by wave energy or particle radiation
    • C08F2/48—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light
    • C08F2/50—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light with sensitising agents
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2/00—Processes of polymerisation
    • C08F2/60—Polymerisation by the diene synthesis
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F212/00—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 an aromatic carbocyclic ring
    • C08F212/02—Monomers containing only one unsaturated aliphatic radical
    • C08F212/04—Monomers containing only one unsaturated aliphatic radical containing one ring
    • C08F212/06—Hydrocarbons
    • C08F212/08—Styrene
    • 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
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
    • 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
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/34—Heterocyclic compounds having nitrogen in the ring
    • C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
    • C08K5/3472—Five-membered rings
    • C08K5/3475—Five-membered rings condensed with carbocyclic rings
    • 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
    • C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
    • C08K5/37—Thiols
    • C08K5/378—Thiols containing heterocyclic rings
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
    • C08L33/04—Homopolymers or copolymers of esters
    • C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
    • C08L33/10—Homopolymers or copolymers of methacrylic acid esters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2033/00—Use of polymers of unsaturated acids or derivatives thereof as moulding material
    • B29K2033/04—Polymers of esters
    • B29K2033/08—Polymers of acrylic acid esters, e.g. PMA, i.e. polymethylacrylate
    • 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
    • B29L2031/753—Medical equipment; Accessories therefor
    • 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
    • C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
    • C08J2333/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
    • C08J2333/06—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C08J2333/10—Homopolymers or copolymers of methacrylic acid esters
    • C08J2333/12—Homopolymers or copolymers of methyl methacrylate

Definitions

  • the invention relates to a process for the preparation of storage-stable prepregs and molded articles (composite components) produced therefrom.
  • 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-layup technology. In addition to faster cycle times and higher storage stabilities - even at room temperature - industrial users of such systems also need a way to cut the prepregs without the automated cutting and lay-up of the individual prepreg layers contaminating the cutting tools with the often sticky matrix material.
  • Various shaping processes such. Reaction transfer molding (RTM) processes involve incorporation of the reinforcing fibers into a mold which
  • WO 2006/043019 a process for the preparation of prepregs based on epoxy resin polyurethane powders is described. Furthermore, prepregs based on powdered thermoplastics are known as matrix.
  • WO 99/64216 describes prepregs and composites as well as a method for their production in which emulsions with polymer particles of such small size are used that a single-fiber covering is made possible.
  • the polymers of the particles have a viscosity of at least 5000 centipoise and are either thermoplastics or crosslinking
  • EP 0590702 discloses powder impregnations for the production of prepregs
  • thermoplastics for the production of prepregs.
  • Prepregs with a matrix based on 2-component polyurethanes (2-K-PUR) are also known.
  • the category of 2-component PU essentially comprises the classic reactive polyurethane resin systems. In principle, it is a system of two separate components. While the relevant constituent of one component is always a polyisocyanate, such as polymeric methylene diphenyl diisocyanates (MDI), these are polyols in the case of the second component or, in the case of more recent developments, also amino or amine-polyol mixtures. Both parts are mixed together just before processing. Thereafter, the chemical curing is carried out by polyaddition to form a network of polyurethane or polyurea.
  • MDI polymeric methylene diphenyl diisocyanates
  • 2-component systems have a limited processing time (pot life) after mixing of both components, since the onset of reaction leads to a gradual increase in viscosity and finally to gelation of the system. Numerous influencing factors determine the effective time of its processability: reactivity of the reactants, catalyzation, concentration, solubility, Moisture content, NCO / OH ratio and ambient temperature are the most important [see: Lackharze, Stoye / Friday, Hauser-Verlag 1996, pages 210/212].
  • the disadvantage of prepregs based on such 2-component PUR systems is that only a short time is available for processing the prepreg into a composite. Therefore, such prepregs are not storage stable for several hours let alone days.
  • moisture-curing paints correspond largely to analog 2K systems, both in their composition and in their properties. In principle, the same solvents, pigments, fillers and auxiliaries are used. Unlike 2K paints, these systems tolerate before theirs
  • 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 powdery polyurethane composition is described as a matrix material.
  • the systems can also be poly (meth) acrylates as a co-binder or
  • the object of the present invention in the light of the prior art has been to provide a new prepreg technology which enables a simpler process for the production of easy-to-handle prepreg systems.
  • compositions to be used in the process should not only be suitable for melt or powder impregnation processes for the production of prepregs, but also for RTM processes.
  • compositions are used according to the invention preferably as a resin for the production of prepregs. These prepregs are then suitable for further processing into moldings.
  • the composition according to the invention contains at least the components A to D.
  • Component A is a (meth) acrylate having an alkyl radical with 1 to 10 carbon atoms, styrene or a mixture of such (meth) acrylates and / or styrene.
  • Preferred examples of such monomers in the mixture of component A are methyl methacrylate,
  • the composition may further copolymerize with the monomers of component A, non-crosslinking monomers, such as ⁇ -olefins, cyclic olefins, (meth) acrylic acid, maleic acid or itaconic acid.
  • the formulation may optionally and at the same time preferably contain functionalized (meth) acrylates as component A.
  • These functionalized (meth) acrylates are preferably monomers which have adhesion-promoting properties in relation to the fiber material used.
  • glycidyl (meth) acrylates as component A.
  • the composition of the monomers according to proportion and composition will be suitably chosen with regard to the desired technical function and the substrate to be wetted.
  • Component B is a (meth) acrylate having a moiety having a conjugated diene. Component B may also be a mixture of several of these monomers. Component B is preferably one or more compounds of the following formulas:
  • Ri is preferably hydrogen or a methyl group and R 2 is a divalent alkyl group having preferably 1 to 4 carbon atoms.
  • Component C is a crosslinker having at least two dienophilic groups.
  • Component C is preferably a dienophile having at least two carbon-sulfur double bonds. Most preferably, component C has
  • Z is an electron-withdrawing group, such as a cyano group or a pyridine ring in the ⁇ -position
  • R m is a Regionbindige organic group or a polymer
  • n is a number between 2 and 20.
  • crosslinkers having two dienophile groups
  • crosslinkers having two dienophile groups
  • crosslinkers with dienophilic groups and suitable diene functionalities can be found, for example, in WO 201 1/10176.
  • An alternative, but at the same time preferred embodiment of the invention is characterized in that, alternatively or in addition to the components B and C, the product C is added to a Diels-Alder reaction of these two components B and C.
  • compound C is a compound with the
  • R 2 is hydrogen or a methyl group
  • R 2 is a divalent alkyl group of 1 to 4 carbon atoms
  • Z is an electron-withdrawing group
  • R m is a polyvalent organic group or a polymer
  • n is a number between 2 and 20
  • R 5 is an alkyl or aryl group
  • R 4 is hydrogen or the radicals
  • R 4 and R 5 is a common bridging oxygen atom or a common bridge-forming methylidene group.
  • component C is a Diels-Alder reaction of one
  • R m is a polyvalent organic group or a polymer and number between 2 and 20.
  • compound C is a compound
  • R 1 is hydrogen or a methyl group
  • R 2 is a divalent alkyl group having 1 to 4 carbon atoms
  • Z is an electron-withdrawing group
  • R m is a polyvalent organic group or a polymer and n is one Number between 2 and 20 is.
  • Such functional groups are the dienes which react with the dienophiles from the crosslinker component with addition and thus reversibly crosslink.
  • Component D is a thermally activatable initiator, a
  • Decay catalyst a combination of an initiator and an accelerator, and / or a photoinitiator.
  • thermally activatable initiators those skilled in the art, especially peroxides or aza- initiators are well known.
  • the accelerators which can optionally be added optionally to lower the initiation temperature are generally tertiary, usually aromatic, amines.
  • Suitable decomposition catalysts are metal complexes which decompose an inserted peroxide and thereby release free radicals.
  • cobalt complexes such as cobalt octoate, which is sold under the name Accelerator NL-49P by Akzo, or cobalt naphthenate are used.
  • cobalt-free variants based on, for example, copper complexes are known.
  • Photoinitiators and their preparation are described, for. In "Radiation Curing in Polymer Science & Technology, Vol. II: Photoinitiating Systems" by JP Fouassier, JF Rabek, Elsevier Applied Science, London and New York, 1993. Often these are ⁇ -hydroxy ketones or derivatives of these or Phosphines
  • the photoinitiators, if present, may be present in amounts of from 0.2% to 10% by weight
  • Suitable photoinitiators are the following commercially available products: Basf-CGI-725 (BASF), Chivacure 300 (Chitec), Irgacure PAG 121 (BASF), Irgacure PAG 103 (BASF), Chivacure 534 (Chitec), H-Nu 470 (Spectra group limited), TPO (BASF), Irgacure 651 (BASF), Irgacure 819 (BASF), Irgacure 500 (BASF), Irgacure 127 (BASF), Irgacure 184 (BASF), Duracure 1 173 (BASF).
  • the composition may contain up to 50% by weight, preferably 15 to 40% by weight of a polymer, preferably a poly (meth) acrylate or a polyester.
  • a polymer preferably a poly (meth) acrylate or a polyester.
  • This optional polymer component is also referred to hereinafter as a prepolymer for better distinctness.
  • Prepolymers used to improve the polymerization properties, the mechanical properties, the adhesion to the substrate, the viscosity adjustment, as well as the optical requirements of the resins are compatible with the polymers formed from components A, B and A.
  • these polymers are additionally functionalized with diene and / or dienophile groups.
  • Said poly (meth) acrylates are generally of the same monomers
  • Precipitated polymerisation are obtained and are added to the composition as a pure substance.
  • a weight ratio of components A and D to components B and C or to component C between 95 to 5 and 50 to 50 is preferred. Especially is one
  • Ratio between 90 to 10 and 75 to 25 is preferred.
  • the molar ratio of the functional groups in component B to the functional groups in component C may be between 2 to 1 and 1 to 2. Most preferably, this ratio is about 1 to 1.
  • the composition contains 30 to 80% by weight of components A, B and optionally A ', 1 to 30% by weight of component C, 0 to 40% by weight of polymer and 0.5 to 8% by weight of component D. Most particularly preferred the composition contains 40 to 50% by weight of components A and optionally A ', 2 to 10% by weight of component B, 2 to 10% by weight of component C, 0 to 30% by weight of polymer and 3 to 6% by weight of component D.
  • auxiliaries and additives in addition regulators, plasticizers, stabilizers and / or inhibitors can be used.
  • dyes, fillers, wetting, dispersing and leveling agents, adhesion promoters, UV stabilizers, defoamers and rheology additives can be added.
  • UV stabilizers are selected from the group of benzophenone derivatives,
  • Benzotriazole derivatives thioxanthone derivatives, piperidinol carboxylic acid ester derivatives or 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 polyhydroxycarboxylic acid amides
  • Urea derivatives salts of unsaturated carboxylic acid esters, alkylammonium 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 the compounds used. It has been found that rheology additives based on pyrogenic or precipitated, optionally also 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 paraffinic mineral oils, glycol derivatives, derivatives of
  • composition according to the invention lies in the production of a deformable pseudo-thermoplastic semifinished product / prepreg, which is melted reversibly in a further step during the production of the composite components, or parts thereof, but is autonomously re-crosslinked The last two steps, a subsequent shaping of the already cured to thermosetting molding is surprisingly possible.
  • the starting formulation is liquid and thus suitable for the impregnation of fiber material without the addition of solvents.
  • the semi-finished products are stable in storage
  • composite semi-finished products with at least the same but also improved processing properties compared to the prior art, which can be used for the production of high-performance composites for a wide variety of applications.
  • the reactive compositions which can be used according to the invention are environmentally friendly, cost-effective, have good mechanical properties, are easy to process and are distinguished by good weather resistance as well as by a balanced ratio between hardness and flexibility.
  • composite semi-finished products is used in the context of this invention synonymous with the terms prepreg and organo sheet.
  • a prepreg is usually a precursor for thermoset
  • An organic sheet is usually a precursor for thermoplastic composites.
  • Such a process comprises the following process steps: a) preparation of a previously described composition according to the invention which comprises at least the components A, B, C and D or A, C and D by mixing,
  • composition with the impregnated fiber material by means of heat, electromagnetic radiation, electron radiation and / or a plasma
  • Curing under the influence of heat in process step c) takes place at a temperature T-i which results specifically for the person skilled in the art from the properties of the initiator used.
  • a decomposition temperature at which half of the initiator is available as initiator within one hour is between 70 and 150.degree. C., preferably between 80 and 120.degree.
  • Particularly preferred is the initiation temperature T-i in
  • the fibrous or equivalent carrier material in the composite semifinished product preferably used in the process according to the invention is characterized in that the fibrous carriers consist largely of glass, carbon, plastics, such as polyamide
  • Invention consists of fibrous material (also often called reinforcing fibers).
  • fibrous material also often called reinforcing fibers.
  • any material that makes up the fibers is suitable.
  • 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 aluminum oxides and / or silicon oxides) used.
  • mixtures of fiber types e.g. Fabric combinations of aramid and glass fibers, or carbon and glass fibers, may be used.
  • hybrid composite components are made with prepregs
  • Glass fibers are the most commonly used fiber types mainly because of their relatively low price. In principle, here are all types of glass-based
  • 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 (also carbon fibers) are industrially produced fibers from carbonaceous raw materials which are converted by pyrolysis into graphitic carbon. A distinction is made between isotropic and anisotropic types: isotropic fibers have only low strengths and lower technical
  • anisotropic fibers show high strength and stiffness with low elongation at break.
  • 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).
  • aramid 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.
  • Expansion coefficients of the matrix resin can be finished high dimensional components. Compared to carbon fiber reinforced plastics, the compressive strength of aramid fiber composites is significantly lower. Known brand names for aramid fibers are
  • Nomex® and Kevlar® from DuPont or Teijinconex®, Twaron® and Technora® from Teijin.
  • Particularly suitable and preferred are carriers made of glass fibers, carbon fibers,
  • the fibrous material is a textile fabric. Suitable are textile fabrics made of fleece, as well So-called knitwear, such as knitted fabrics and knits, but also non-meshed containers such as fabric, scrim or braid. In addition, a distinction between long-fiber and
  • Short fiber materials as a carrier.
  • rovings and yarns are also suitable according to the invention. 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.
  • the molding produced by means of the process steps a) to d) can be further processed.
  • These process steps e) to g) required for this can be repeated several times: e)
  • the molding obtained from process steps a) to d) is heated to a temperature T 2 above the retro-Diels-Alder temperature of cured composition lies, heated,
  • temperatures T 2 which must be exceeded in order to enable the retro-Diels-Alder reaction
  • temperature T 3 which must be exceeded to allow re-crosslinking by means of a Diels-Alder reaction
  • the diene-functionalized (meth) acrylate components crosslink - if Ti is lower than T 2 or T 3 - already in the polymerization or - in the preferred case that Ti is higher than T 2 or T 3 - then after cooling with the di- or multifunctional dienophile components already present in the composition, wherein the reaction can be accelerated by an elevated temperature in certain pairings.
  • This temperature is below the retro-Diels-Alder temperature T 2 , at which the back reaction of the Diels-Alder adducts back to the diene functionalities and
  • thermosets or reversibly crosslinked composite components can be produced below the retro-Diels-Alder temperature.
  • the diene and dienophile functionality are chosen such that they can enter into a Diels-Alder reaction at room temperature, and that the temperature T 2 for the retro-Diels-Alder reaction is in an easily representable range.
  • T 3 is between 50 and 300 ° C, preferably between 80 and 200 ° C and more preferably between 100 and 150 ° C.
  • Such a use of a molded part according to the invention may in particular in the construction industry, for the production of sporting goods, in the automotive industry, in the aerospace industry, in electrical appliances or devices, in Windkraftan were in the

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  • Oral & Maxillofacial Surgery (AREA)
  • Manufacturing & Machinery (AREA)
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  • Reinforced Plastic Materials (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

L'invention concerne un procédé de fabrication de préimprégnés stables au stockage, ainsi que des éléments façonnés (pièces composites) fabriqués à partir de ces derniers. La composition utilisée pour fabriquer les préimprégnés selon l'invention contient : A) des monomères, en particulier des (méth)acrylates et/ou du styrène ; B) au moins un (méth)acrylate comportant un reste qui contient un diène conjugué ; C) un agent de réticulation portant au moins deux groupes diénophiles ; et D) au moins un amorceur adéquat. En variante, la composition peut contenir à la place ou en plus des composants B) et C) un produit E) d'une réaction de Diels-Alder des deux composants B) et C).
EP14795819.3A 2013-11-19 2014-11-06 Pièces façonnées à base de (méth)acrylates à fonctionnalité diène et de (hétéro)diénophiles de diels-alder, avec réticulation réversible Withdrawn EP3071632A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013223544 2013-11-19
PCT/EP2014/073918 WO2015074887A1 (fr) 2013-11-19 2014-11-06 Pièces façonnées à base de (méth)acrylates à fonctionnalité diène et de (hétéro)diénophiles de diels-alder, avec réticulation réversible

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EP3071632A1 true EP3071632A1 (fr) 2016-09-28

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US (1) US20160304683A1 (fr)
EP (1) EP3071632A1 (fr)
JP (1) JP2016540073A (fr)
KR (1) KR20160087863A (fr)
CN (1) CN105916916A (fr)
CA (1) CA2930476A1 (fr)
TW (1) TWI646138B (fr)
WO (1) WO2015074887A1 (fr)

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EP2982704A1 (fr) 2014-08-06 2016-02-10 Evonik Degussa GmbH Émulsions de polymère réticulées réversibles
EP3199575A1 (fr) * 2016-01-29 2017-08-02 Evonik Degussa GmbH Nouvel agent de reticulation d'hetero-diels-alter et son utilisation dans des systemes polymeres a reticulation reversible
CN106832105A (zh) * 2017-01-18 2017-06-13 福建师范大学泉港石化研究院 一种有机硅改性聚丙烯酸酯树脂3d打印材料及其制备方法
CN106883341A (zh) * 2017-01-18 2017-06-23 福建师范大学泉港石化研究院 一种新型结构的聚丙烯酸酯树脂3d打印材料及其制备方法
CN106883328A (zh) * 2017-01-18 2017-06-23 福建省支点三维科技有限公司 一种户外用的聚丙烯酸酯树脂3d打印材料及其制备方法
CN106832091A (zh) * 2017-01-18 2017-06-13 福建省支点三维科技有限公司 一种热固性聚丙烯酸酯树脂3d打印材料及其制备方法
DE112019002914T5 (de) * 2018-06-08 2021-03-04 Cummins Filtration Ip, Inc. Vernetzte vliese, hergestellt durch schmelzblasen reversibler polymernetzwerke
CN111040247B (zh) * 2019-12-31 2021-03-05 大连理工大学 一类硫化剂及其应用

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Publication number Publication date
TWI646138B (zh) 2019-01-01
JP2016540073A (ja) 2016-12-22
TW201602208A (zh) 2016-01-16
KR20160087863A (ko) 2016-07-22
CA2930476A1 (fr) 2015-05-28
CN105916916A (zh) 2016-08-31
US20160304683A1 (en) 2016-10-20
WO2015074887A1 (fr) 2015-05-28

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