EP2044135A1 - Thermoplastisch verarbeitbare duroplastformmassen mit verbessertem eigenschaftsspektrum - Google Patents
Thermoplastisch verarbeitbare duroplastformmassen mit verbessertem eigenschaftsspektrumInfo
- Publication number
- EP2044135A1 EP2044135A1 EP07786225A EP07786225A EP2044135A1 EP 2044135 A1 EP2044135 A1 EP 2044135A1 EP 07786225 A EP07786225 A EP 07786225A EP 07786225 A EP07786225 A EP 07786225A EP 2044135 A1 EP2044135 A1 EP 2044135A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- alkyl
- duroplastformmassen
- fibers
- alkylene
- amines
- 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- Withdrawn
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Classifications
-
- 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
- C08G12/00—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
- C08G12/02—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes
- C08G12/26—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds
- C08G12/30—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds with substituted triazines
- C08G12/32—Melamines
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
- C08L61/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
- C08L61/26—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds
- C08L61/28—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds with melamine
Definitions
- thermoset molding compounds with improved property spectrum
- the invention relates to new thermoset molding compositions according to claim 1, a thermally latent curing agent according to claim 24, a process for their preparation according to claim 31, an apparatus for their preparation according to claim 39 and their use according to claim 40.
- Duroplast molding compositions based on aminotriazine resins such as melamine-formaldehyde resins or melamine-urea-formaldehyde resins [Ulimann's Encyclopedia of Industrial Chemistry (1987), Vol. A2, 130-131] are known. Disadvantageous in the production of products made of melamine resins is the difficult processability by conventional thermoplastic processing methods such as extrusion or injection molding.
- Low molecular weight melamine resin precondensates have too low a melt viscosity for these processing methods and can only be processed as highly filled molding compositions with long cycle times with hardening of the products (Woebcken, W., Kunststoff-Handbuch Vol. 10 "Duroplaste", Carl Hanser, Kunststoff 1988, pp. 266-274). Due to the low melt viscosity of the melamine resin precondensates, fibers, foams or coatings of melamine resins can only be produced starting from solutions of the melamine resin precondensates with curing during shaping.
- the hitherto known melamine resin molding compounds are only of limited suitability for the production of the thinnest components in the field of injection molding. In particular, component thicknesses below 1mm are not feasible or only by suitable choice of tools.
- the curing times for melamine resin molding compounds are currently 10 to 20s curing time per mm workpiece. These fairly long curing times are due to the degree of precondensation of the melamine resins produced in the spray process. Resin solutions have similar cure times.
- melamine resin molding compositions with isocyanates as reactive component are known, which can indeed be processed from the melt, but their curing by the enormous amount of condensate, which are formed in the reaction with isocyanates, hardly bubble-free is possible (WO 2004/083275). Furthermore, the isocyanates usually react faster with the condensates of Melaminharzhärtung than with the melamine resin, whereby no sufficient chemical coupling can be achieved.
- Known melamine resin molding compositions require catalysts for rapid curing (A.J.Kirsch, American Paint & Coating J. 26 (1990), 36-41). Although these catalysts have a certain latency. The disadvantage, however, is that nevertheless a curing begins at low processing temperatures, which leads to processing difficulties of the molding compound after a short time, in particular in injection molding.
- thermosetting molding compositions could previously be carried out with calenders or screw extruders.
- the production-wise use of continuous-working co-kneaders was not possible due to the reactive materials or kneading could be done only by the use of additional tools for rheology control.
- the deposition of cured composites on the kneader and the discharge screw also require a periodic shutdown of the co-kneading required.
- the product obtained from the various processes is a granulate or broken fines, but which has a high dust content and a broad particle size distribution.
- thermosetting molding compositions Another disadvantage of the previously known thermosetting molding compositions is their poor processability at low processing temperatures due to their high reactivity described. They can therefore not be processed in a tool with a tempered sprue part (cold runner technique), since the onset of hardening changes the viscosity in the sprue area too much and affects the processing.
- the invention is now based on the problem of novel thermoset molding compounds. to provide shorter curing times and improved processability and thus equal cycle times in the production in the current processing methods such as injection molding, pressing, extrusion, and in particular the special processing method in injection molding with cold runner tool.
- thermoset molding compositions according to the invention contain thermoplastically processable Polyaminotriazinformmassen based on fusible Polyaminotriazinethem having molecular weights of 500 to 5000 and a latent curing agent comprising amines, weak acids, organic peroxides and / or free-radical scavengers in a proportion of 0.01 to 10% by weight, based on the sum the polyaminotriazine ether.
- the latent hardener is preferably a thermally latent hardener and / or latent hardener, which is excited by UV light.
- thermosetting molding compositions lies in the processability in injection molding, wherein due to the use of the latent curing agent long service life of the molding compositions at low temperatures without incipient crosslinking in the injection unit of the injection molding machine are possible.
- latent hardener in particular a thermally latent curing agent, is meant a compound or a mixture which releases an acid when the temperature is raised.
- the acid can also be released by UV excitation.
- the acid reacts only after its release as a hardener.
- the addition of amines prevented or delays a release of the acid at low temperatures up to 140 0 C. Only at higher temperatures, the acid release, whereby a processing of the melt is possible even at lower temperatures.
- the hardener according to the invention also causes an accelerated curing, which leads to a reduction of the curing times.
- thermosets have a latent curing agent comprising a mixture of amines and weak acids and / or a mixture of organic peroxides and amines and / or a mixture of organic peroxides and radical scavengers.
- R 1 -NH 2 , -NH-CHR 2 -OH, -NH-CHR 2 -OR 3 , MH-CHR 2 -OR 4 -OH, -CH 3 , -C 3 H 7 , -C 6 H 5 . -OH, phthalimido.
- R 2 H 1 C 1 -C 7 -alkyl
- R 3 C 1 -C 18 -alkyl, HO-R 4 -,
- R 4 -CH (CH 3 ) -CH 2 -OC 2 -C 12 -alkylene-O-CH 2 -CH (CH 3 ) -, -CH (CH 3 ) -CH 2 -OC 2 -C 12 -arylene -O-CH 2 -CH (CH 3) -,
- n 1 to 200;
- X ⁇ (CH 2 ) 2.8 -O-CO-C 6 -C 14 arylene-CO-O- (CH 2 ) 2 . 8 - ⁇ or - ⁇ (CH 2 ) 2 . 8 -O-CO-C 2 -C 12 alkylene-CO-O- (CH 2 ) 2-8 - ⁇ ;
- thermoset molding compounds have up to 80% by mass of absorber and / or reinforcing fibers, with silicic acid and its derivatives, cellulose and derivatives thereof, wood flour, zeolites, activated carbon and / or polyacrylic acid derivatives being used as absorbers.
- the absorbers store the separated condensates, such as methanol or water, by their storage in their cavities or layers.
- Cellulose or wood cause absorption of the split-off condensates.
- Preferred reinforcing fibers are inorganic fibers, in particular glass fibers, basalt fibers and / or carbon fibers, natural fibers, in particular cellulose fibers such as flax, jute, sisal, kenaf and wood fibers, and / or plastic fibers, in particular polyacrylonitrile, polyvinyl alcohol, polyvinyl acetate, polypropylene, polyesters and / or fibers. or polyamides used.
- thermosets also advantageously have up to 50% by mass impact modifiers and / or elastifiers
- elastifiers and / or impact modifiers are advantageously compounds from the group of sulfonic acid amides, acrylamides, urea derivatives such as hydroxyethylethyleneurea, monoether polyvalent C 1 -C 20 -AlkOhOIe,
- the operating principle of impact modifiers is their ability to stop microcracks in the material. An essential prerequisite for this is a homogeneous distribution in the molding compound, which allows absorption of the impact energy.
- elastomers used.
- the modifiers have either compatibility in part, through to chemical coupling through coordinative bonds with the resin, or a separate phase similar to an interpenetrating network.
- thermoset molding compositions advantageously contain up to 50% by weight of at least one further inorganic and / or organic filler
- the fillers advantageously comprise wollastonite, kaolin, bentonites, montmorillonites, smectites, talc, precipitated calcium carbonates and calcium carbonate, polyvinyl butyrals, polyvinyl acetates, polyamides and / or polyvinyl alcohols, quartz powder, mica, kaolin, dolomite and / or magnesium hydroxide.
- Under shrinkage is the contraction of the material in a defined storage at elevated temperature, usually 1 10 0 C for 1 to 7 days to understand.
- the processing shrinkage is the shrinkage in the manufacture of components, measured on the cold component in relation to the cold tool.
- inorganic fillers such as silicates have a positive effect, as they themselves can not disappear.
- Another advantage of inorganic fillers, which are in the form of platelet or acicular particles, is that they prevent the polymer from building up too dense a network and thus shrinking or shrinking is not so great.
- Bentonites or montmorillonites as representatives of the nanofillers are initially distributed completely in the form of nanoscale particles in the molding compound. This requires a larger number of filler particles in the polymer, which prevent shrinkage. On the other hand, one achieves a statistical distribution of the platelet-shaped particles, which remain in a material shrinkage like a house of cards.
- the polymer When using organic polymers to reduce shrinkage, the polymer is first dissolved in the matrix resin, so that it is at least finely dispersed. When the matrix resin hardens, precipitation or agglomeration of the polymer takes place, the individual phases separating. Thus, the resin is prevented from forming too tight networks.
- the thermal shrinkage of the melting thermoplastics greatly reduces the processing shrinkage, but also the shrinkage, of thermosets.
- the inorganic fillers used have only a lower degree of electrically conductive impurities, such as iron, and of water-absorbing substances.
- the melamine resin used in the molding compositions already has better insulation properties, since it has a lower salt loading of less than 1%, preferably less than 0.5%, due to the process.
- the pH is adjusted only once at the beginning of the synthesis and once again before the melt processing and thus not continuously, as is customary in the conventionally used resins. As a result, the resin has a very low content of salts as minor constituents, which significantly affect the insulating properties.
- the Duroplastformmassen also have an improved thermo-mechanical behavior.
- thermomechanical properties are also improved by the addition of all inorganic fillers, in particular glass fibers, kaolin, wollastonite, basalt fibers, carbon fibers, calcium carbonate, nanofillers such as bentonite, montmorillonite, smectites, mica.
- thermoset molding compounds advantageously have a curing speed of less than or equal to 10 s / mm workpiece, in particular equal to 8 s / mm workpiece, and a relative viscosity of 1 to 20 Nm, in particular from 3 to 12 Nm, measured as torque minimum at 140 ° C and 30rpm DIN 53764, on.
- the shrinkage of the thermoset molding compounds measured according to DIN 53464 is advantageously equal to less than 0.8%, in particular equal to less than 0.3%, and the dielectric strength measured according to IEC 60243-1 equal to greater than 35 kV / mm, in particular equal to greater than 25 kV / mm.
- the impact strength measured in accordance with DIN ISO 179 of the molding composition according to the invention is between 5 to 40 kJ / m 2 , in particular 10 to 25 kJ / m 2 , and the tensile strength measured according to DIN EN ISO 527-2 between 60 to 100 MPa, in particular from 70 to 90 MPa.
- thermoset molding compounds have a heat resistance after HDT-C measured according to DIN ISO 75-2 greater than or equal to 150 0 C 1 in particular greater than or equal to 200 0 C, on
- the latent curing agent used to cure the thermoset molding compositions comprises a mixture of amines and weak acids, a mixture of organic peroxides and amines and / or a mixture of organic peroxides and radical scavengers and / or stabilizers.
- the weak acids used in the hardener are preferably selected from one of the following groups: blocked sulfonic acids and sulfonates, in particular guanidime sulfamate, alkali metal salts or ammonium salts of phosphoric acid, C r -C 2 -alkyl or C 2 -C 8 -hydroxyalkyl esters of C 6 -C 4 Carbonklare ⁇ aromatic or inorganic acids,
- the latent hardener advantageously contains, as organic peroxides, tert-butyl peroxybenoate, dibenzoyl peroxide, tert-butyl peroxyisopropyl carbonate, tert-butyl peroxy-2-ethylhexyl carbonate, tert-butyl peroxy-3,5,5-trimethylhexanoate, tert-butyl peroxyacetate, terf-butyl peroxyisobutyrate, tert-butylperoxy-diethylacetate, terf-butylperoxy-2-ethylhexanoate, tert-amyl-peroxy-2-ethylhexanoate, 1,1,3,3-tetramethylbutyl-peroxy-2-ethylhexanoate, didecanoyl peroxide, dilauroyl peroxide and / or tert-butyl peroxypivalate.
- the preferred amines used have the structure R 1 R 2 R 3 N or R 1 R 2 NR 4 -NR 1 R 2 , wherein ;
- Triisopropanolamine, triethanolamine and / or triisopentylamine are preferably used.
- radical scavengers in 4-tert-butylcatechol benzoquinone, hydroquinone, 2,6-tert-butyl-p-cresol, 2,6, di-tert-butylphenol and / or 4-hydroxy-tetramethyl-pyrrolidone oxide are used.
- stabilizers are preferably mixtures of phenolic antioxidants, 3-arylbenzofuranones, processing stabilizers based on phosphites, high temperature stabilizers based on disulfides and thioethers and / or sterically hindered amines (HALS) are used.
- the latent curing systems advantageously have a mixing ratio of acid to amine of 1: 0.1 to 1: 5, of organic peroxide to amine of 1: 0.1 to 1: 5, and / or organic peroxide to radical scavenger of 1: 0 , 1 to 1: 5 on.
- the hardeners of the invention enable the curing of the Duroplastformmassen above a start temperature of 120 0 C.
- thermoset molding compositions may be in the form of cylindrical, lenticular, pastille-shaped or spherical particles and flakes having an average diameter of 0.5 to 8 mm, in particular from 0.5 to 3 mm.
- the ratio aldehyde component / aminotriazine component is preferably 1: 1 to 5: 1.
- Suitable aminotriazine moieties in the fusible polyaminotriazine ethers defined by the substituent Ri in the structural formula are melamine, acetoguanamine, benzoguanamine, butyroguanamine, N- (4,6-diamino-1,3,5-triazine-2- yl) phthalimide and 2,4-diamino-6-succinimido-1,3,5-triazine.
- Examples of suitable in the fusible polyaminotriazine ethers defined by the substituent R 2 in the structural formula are formaldehyde, acetaldehyde and trimethylolacetaldehyde.
- the fusible polytriazine ethers can be prepared by reacting aminotriazines with C 1 -C 8 -aldehydes to give aminotriazine precondensates, etherifying the aminotriazine precondensates with C 1 -C 4 -alcohols, optionally with transetherification with C 5 -C 18 -alcohols and or diols of the type HO-R 4 -OH, and thermal self-condensation at 120 to 19O 0 C produce.
- R 3 is defined in the structural formula, the etherification component, which is a C 1 -C 18 -AlkOhOl and / or a diol of the HO-R 4 -OH type.
- C 1 -C 4 -alkyl which may be present as the etherification component R 3 in the meltable polyaminotriazine ethers are methanol, isopropanol and butanol.
- C 5 -C 8 -alcohols which may be contained as the etherification component R 3 in the meltable polyaminotriazine ethers are ethylhexyl alcohol, dodecyl alcohol and stearyl alcohol.
- ester bis (hydroxyethyl) terephthalate is preferred.
- C 1 -C 4 -alkyl C 1 -C 4 -alkyl which may be contained as the etherification component R 3 in the meltable Polyaminotriazinethem are 1, 3-bis (hydroxybutyl) tetramethyldisiloxane and 1, 3-bis (hydroxy-octyl) tetraethyldisiloxane.
- R 4 - [(X) r -O-CO- (Y) s -CO-O- (X) r ] -, which may be contained as the etherification component R 3 in the meltable polyaminotriazine ethers,
- X ⁇ (CH 2 ) 2 . 8 -O-CO-C 6 -C 14 -arylene-CO-O- (CH 2 ) 2 -8- ⁇ or - ⁇ (CH 2 ) 2 ⁇ -O-CO-C 2 -C 12 -methylene-CO-
- hydroxyl-containing polyester based on aromatic dicarboxylic acids, C 6 -C 14 arylene such as terephthalic acid or naphthalenedicarboxylic acid, aliphatic C 2 -C 12 - alkylene dicarboxylic acids such as adipic acid, maleic acid or pimelic acid, diols such as ethylene glycol, butanediol, neopentyl glycol or hexanediol and siloxanes such as Hexamethyldi- siloxane or ⁇ , ⁇ -Dihydroxypo! Ydimethyisiloxan.
- aromatic dicarboxylic acids C 6 -C 14 arylene such as terephthalic acid or naphthalenedicarboxylic acid, aliphatic C 2 -C 12 - alkylene dicarboxylic acids such as adipic acid, maleic acid or pimelic acid, diols such as ethylene glycol, but
- etherification component R 3 in the meltable Polyaminotriazinethern ent are polyether diols based on siloxanes such as hexamethyldisiloxane or ⁇ . ⁇ - Dihydroxypolydimethylsiloxan and alkylene oxides such as ethylene oxide or propylene oxide.
- Examples of diols based on alkylene oxide adducts of melamine of the type 2-amino-4,6-bis (hydroxy-C 2 -C 4 -alkyleneamino) -1, 3,5-triazine, which contain as etherification component R 3 in the meltable Polyaminotriazinethern may be diols based on melamine and ethylene oxide or propylene oxide.
- phenol-ether diols based on dihydric phenols and C 2 -C 8 -diols of the bis (hydroxy-C 2 -C 8 -alkylene-O-) C 6 -C 18 -arylene type which contain as etherification component R 3 in the meltable polyaminotriazine ethers may be ethylene oxide adducts or propylene oxide adducts to diphenylolpropane.
- trimeric alcohols such as glycerol, trimethylolpropane or tetrahydric alcohols such as erythritol or mixtures thereof with dihydric alcohols may also be present as the etherification component R 3 in the meltable polyaminotriazine ethers.
- the meltable polyaminotriazine ethers are preferably etherified melamine resins based on melamine, formaldehyde and methanol.
- thermoset molding compositions advantageously also have up to 50% by mass of further reactive polymers of the ethylene copolymer type, maleic anhydride copolymers, modified maleic anhydride copolymers, poly (meth) acrylates, polyamides, polyesters and / or polyurethanes, and also further stabilizers, UV stabilizers. Absorber, dyes, flame retardant additives and / or other auxiliaries.
- thermoset molding compositions examples include C 2 -C 20 -olefin-maleic anhydride copolymers or copolymers of maleic anhydride and C 8 -C 2 o-vinylaromatics.
- modified maleic anhydride copolymers optionally contained in the thermosetting molding compositions are preferably partially or completely esterified, amidated or imidated maleic anhydride copolymers.
- modified copolymers of maleic anhydride and C 2 -C 2 o-olefins or C 8 -C 20 -vinyl aromatics having a molar ratio of 1: 1 to 1: 9 and weight average molecular weights of 5000 to 500,000, with ammonia, CiC 18 -monoalkylamines, C 6 -C 18 -aromatic monoamines, C 2 -C 8 -monoamino alcohols, monoaminated poly (C 2 -C 4 -alkylene) oxides of molecular weight from 400 to 3000, and / or mono-etherified poly (C 2 -C 4 -alkylene) oxides have a molecular weight of 100 to 10,000 reacted, the molar ratio of anhydride copolymer / ammonia, amino groups dC ⁇ -Monoalkylamine, C 6 -C 18 - aromatic monoamines, C 2 -C 18 -Monoaminoal
- poly (meth) acrylates optionally contained in the thermoset molding compositions are copolymers based on functional unsaturated (meth) acrylate monomers such as acrylic acid, hydroxyethyl acrylate, glycidyl acrylate, methacrylic acid, hydroxybutyl methacrylate, or glycidyl methacrylate and nonfunctional unsaturated (meth) acrylate monomers such as ethyl acrylate, butyl acrylate, ethylhexyl acrylate, methyl methacrylate, ethyl acrylate and / or butyl methacrylate and / or C 8 -C 20 vinyl aromatics. Preference is given to copolymers based on methacrylic acid, hydroxyethyl acrylate, methyl methacrylate and styrene.
- functional unsaturated (meth) acrylate monomers such as acrylic acid, hydroxyethyl acrylate, glycidy
- saturated dicarboxylic acids such as phthalic acid, isophthalic acid, adipic acid and / or succinic acid
- unsaturated dicarboxylic acids such as maleic acid, fumaric acid and / or itaconic acid
- diols such as ethylene glyco
- thermoset molding compositions examples include unvetetzte polyurethanes based on toluene diisocyanate, diphenylmethane diisocyanate, butane diisocyanate and / or hexanediisocyanate as diisocyanate and Butanediol, hexanediol and / or polyalkylene glycols as diol components having molecular weights of 2000 to 30,000.
- flame retardant additives examples include phosphates, pyrophosphates, polyphosphates, phosphonates and / or in combination with polyols, cyanurates, borates, aluminum hydroxide, magnesium hydroxide, melamine, and / or mixtures thereof.
- auxiliaries optionally contained in the thermosetting molding compositions are processing aids such as calcium stearate, magnesium stearate, zinc stearate, long-chain amines and / or amides and / or waxes.
- thermosets of the invention have a starting temperature of the curing agent between 120 to 160 ° C, preferably 140 0 C and are therefore suitable for processing by injection molding, in particular in the process of cold runner technology.
- thermoset molding compositions according to the invention are thus distinguished not only by improved processability but also by improved flowability, viscosity, melt behavior, improved thermomechanics, improved electrical breakdown strength, improved impact strength and reduced shrinkage.
- thermoset molding compositions of the invention are prepared by a process in which the meltable polyaminotriazine ethers are melted first with molar masses of 500 to 5000 in a continuous kneader at temperatures of 50 to 15O 0 C and residence times of 0.25 to 20 min, and the melt between 0.01 and 10% by weight, based in each case on the sum of polyaminotriazine ethers of a latent hardener comprising amines, weak acids, organic peroxides, free-radical scavengers and / or stabilizers.
- the melt is also up to 80% by weight of absorber and / or reinforcing fibers, and / or up to 50% by mass impact modifiers and / or elastifiers, and / or up to 50% by mass of inorganic or organic fillers.
- the kneader used is preferably continuous co-kneaders with L / D of 7-11.
- L / D of 7-11.
- the dosage of triaminotriazine ether is preferably carried out as a solid via forced delivery. Further molding compound components are also metered via forced delivery.
- the thermoset molding compound obtained is then knocked off via a discharge shaft on a nozzle hole plate with a hole diameter of 1 to 15 mm, preferably 3 mm, wherein a granulate is obtained by air-cooled hot break.
- the granules are cooled by means of a vibration spiral vibrating conveyor, a vibrating trough or a granulate conveying column (GRP) and then bagged.
- GRP granulate conveying column
- the dust content of the granules was determined by means of a vibrating trough and is less than or equal to 0.5%, preferably less than or equal to 0.1%, for the granules obtained. In the case of glass fiber molding compounds, a maximum of 0.3% dust and, in the case of cellulose-filled molding materials, less than 0.1% dust were produced.
- aminotriazine ethers are precondensates which are 4,6-bis (ethoxymethylamino) -2-butoxymethylamino-1, 3,5-triazine, 2.4 l of 6-tris (dimethoxymethyl-imino) -1,3 ) 5-triazine or 2 , 4,6-Trimethoxymethylamino-1, 3,5-triazine as the main component in admixture with their higher molecular weight oligomers.
- thermoset molding compounds are prepared in a device comprising at least one continuous kneader, preferably a continuous co-kneader with L / D of 7-1 1, at least one metering system with forced delivery, at least one discharge shaft with at least one nozzle hole plate with 15 to 100 holes, preferably 40 to 60 holes, with a hole diameter of 1-5 mm, preferably 3mm, and / or at least one Virbrationsplanetarylschwingl constituenter, a vibrating trough or a granulate conveying column comprises.
- the Duroplastformmassen are particularly suitable for melt processing, in particular as a hot melt adhesive and for the production of plates, tubes, profiles, injection molded parts, fibers and foams, and for processing from solution or dispersion as an adhesive, impregnating resin, paint resin or laminating resin or for the production of foams, microcapsules or fibers.
- a melamine dispersion is prepared by introducing 1.0 kg of melamine in 13.7 kg of methanol at 95 ° C., and after adjusting the pH to 6 in the stirred autoclave as aldehyde component, a mixture of 3 kg of formaldehyde, 1 , 29 kg of methanol and 4.31 kg of water, which is preheated to 90 ° C, metered under pressure, and reacted the reaction mixture at a Christstemperaiur of 95 0 C and a reaction time of 5 min.
- a pH of 9 is set by addition of n / 10 sodium hydroxide solution, and the etherified aminotriazine resin condensate dissolved in the water / methanol mixture is transferred to a first vacuum evaporator in which the solution of the etherified aminotriazine resin condensate is added 80 ° C to a highly concentrated Aminotriazinharzates, which has a solids content of 75% by mass and a water / methanol content of 10% by mass, is concentrated.
- the highly concentrated solution of the etherified Aminotriazinharzes is transferred to a second vacuum evaporator and concentrated at 90 ° C to a syrupy melt, which has a solids content of 95% by weight and a water / methanol content of 5% by weight.
- the syrupy melt is fed at 3.5 kg / h into the feed funnel of a laboratory extruder GL 27 D44 (Leistritz) with Vacuumentgasungszonen after the feed zone and before the product discharge and a side flow metering for liquid media, temperature profile 220 ° C / 240 o C / 240 o C.
- the polyaminotriazine ether flakes are metered at a rate of 45% by weight, based on the total compound, via forced delivery.
- Additional gravimetric weighfeeder weigh 30% cellulose, 15%
- Processing aids dosed The materials are homogenized in a kneader at 95 ° C and beaten hot on a 3mm nozzle plate via the discharge screw.
- the product discharge to the cooling unit is supported by compressed air. After cooling over a
- Vibratory vibratory vibratory conveyor the granules are bagged.
- the granulate is sprayed on an injection molding machine (Battenfeld) suitable for thermosets.
- the granules are first melted at temperatures of 70 0 C in the cylinder and 90 0 C in the nozzle. Subsequently, the material is injected into the 180 0 C hot tool and demolded after 60s as Switzerlandprüfstab. Subsequent testing revealed an E modulus of 7 GPa, impact strength of 10 kJ / m 2, and a 0.4% shrinkage.
- the granulate is sprayed on an injection molding machine (Battenfeld) suitable for thermosets with a cold runner tool.
- the injection unit the granules are first melted at temperatures of 70 0 C in the cylinder and 90 0 C in the nozzle. Subsequently, the material is injected into the 180 0 C hot tool, which has a tempered at 120 ° C cold runner gate and demolded after 60s as Glasprüfstab.
- the hydraulic pressure curves were recorded by the injection cycles and the first maximum, minimum and final pressure were compared as a measure of the stable processing (see Table 1).
- the polyaminotriazine ether flakes are metered at 40% by weight, based on the total compound, via forced delivery. Further gravimetric doses are dosed with 20% glass fiber, 15% silica, 10% calcium carbonate, 10% polyvinyl butyral and 5% auxiliaries with hardener and processing aid. The materials are homogenized in a kneader at 95 ° C and beaten hot on a 3mm nozzle plate via the discharge screw. After cooling via a vibratory vibrating conveyor, the granules are bagged.
- the granulate is sprayed on an injection molding machine (Battenfeld) suitable for thermosets.
- the granules are first melted at temperatures of 70 0 C in the cylinder and 90 0 C in the nozzle. Subsequently, the material is injected into the 180 ° C hot tool and demolded after 60s as Switzerlandprüfstab. Subsequent testing revealed an modulus of elasticity of 14 GPa, tensile strength of 75 MPa, impact strength of 15 kJ / m 2 and a final shrinkage of 0.2%.
- a melamine dispersion is prepared by introducing 1.0 kg of melamine in 13.7 kg of methanol at 95 ° C., and after adjusting the pH to 6 in the stirred autoclave as aldehyde component, a mixture of 3 kg of formaldehyde, 1 reacted 29 kg of methanol, 0.4 kg of butanediol and 4.31 kg of water, preheated to 90 ° C, metered under pressure, and the reaction mixture at a reaction temperature of 95 0 C and a reaction time of 5 min.
- a pH of 9 is set by addition of n / 10 sodium hydroxide solution, and the etherified aminotriazine resin condensate dissolved in the water / methanol mixture is transferred to a first vacuum evaporator in which the solution of the etherified aminotriazine resin condensate is added 8O 0 C to a highly concentrated aminotriazine resin solution, which has a solids content of 75% by weight and a water / methanol content of 10% by mass, is concentrated.
- the highly concentrated solution of the etherified aminotriazine resin is transferred to a second vacuum evaporator and concentrated at 9O 0 C to a syrupy melt which has a solids content of 95% by mass and a water / methanol content of 5% by mass.
- the syrupy melt is fed at 3.5 kg / h into the feed hopper of a laboratory extruder GL 27 D44 (Leistritz) with Vacuumentgasungszonen after the feed zone and before the product discharge and a side flow metering for liquid media, temperature profile 220 o C / 240 o C / 240 o C.
- the polyaminotriazine ether flakes are metered at a rate of 45% by weight, based on the total compound, via forced delivery. Further gravimetric doses are used to dose 33% cellulose, 15% kaolin, 5% quartz powder and 4% auxiliaries with hardener and processing aids. The materials are homogenized in a kneader at 95 ° C and beaten hot on a 3mm nozzle plate via the discharge screw. After cooling via a vibratory vibrating conveyor, the granules are bagged.
- the granulate is sprayed on an injection molding machine (Battenfeld) suitable for thermosets.
- the granules are first melted at temperatures of 75 ° C in the cylinder and 95 ° C in the nozzle. Subsequently, the material is injected into the 180 0 C hot tool and demolded after 60s as Switzerlandprüfstab. Subsequent testing revealed an E modulus of 7 GPa, electrical breakdown of 28 kV / mm and a surface resistance of PTI> 600.
- a 1 1 D-Co kneader (Coperion-Buss)
- the polyaminotriazine ether flakes are metered at 40% by weight, based on the total compound, via forced delivery.
- Further gravimetric doses are 20% glass fiber, 10% silica, 10% Calcium carbonate, 5% cellulose and 5% auxiliaries with ammonium sulfamate as a hardener, triethanolamine as a stabilizer and stearic acid amide as a processing aid.
- the materials are homogenized in a kneader at 110 0 C and cut off hot on the discharge screw at a 3mm nozzle plate. After cooling via a vibratory vibrating conveyor, the granules are bagged.
- the granulate is sprayed on an injection molding machine (Battenfeld) suitable for thermosets.
- the granules are first melted at temperatures of 7O 0 C in the cylinder and 90 0 C in the nozzle. Subsequently, the material is injected into the 180 0 C hot tool and demolded after 35s as 4rnm tensile test bar.
- the polyaminotriazine ether flakes are metered at 35% by weight, based on the total compound, via forced delivery. Further gravimetric doses are used to dose 35% glass fiber, 15% silica, 10% calcium carbonate and 5% auxiliaries with hardener and processing aids. The materials are homogenized in a kneader at 95 ° C and beaten hot on a 3mm nozzle plate via the discharge screw. After cooling via a vibratory vibrating conveyor, the granules are bagged.
- the exemplary embodiments each indicate a specific embodiment of the invention. It will be appreciated by those skilled in the art that parts of the embodiments, e.g. the process conditions can be combined with each other.
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Abstract
Description
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Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE102006034608A DE102006034608A1 (de) | 2006-07-21 | 2006-07-21 | Thermoplastisch verarbeitbare Duroplastformmassen mit verbessertem Eigenschaftsspektrum |
PCT/EP2007/006476 WO2008009464A1 (de) | 2006-07-21 | 2007-07-16 | Thermoplastisch verarbeitbare duroplastformmassen mit verbessertem eigenschaftsspektrum |
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EP2044135A1 true EP2044135A1 (de) | 2009-04-08 |
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EP07786225A Withdrawn EP2044135A1 (de) | 2006-07-21 | 2007-07-16 | Thermoplastisch verarbeitbare duroplastformmassen mit verbessertem eigenschaftsspektrum |
Country Status (3)
Country | Link |
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EP (1) | EP2044135A1 (de) |
DE (1) | DE102006034608A1 (de) |
WO (1) | WO2008009464A1 (de) |
Families Citing this family (9)
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DE102007041438A1 (de) * | 2007-08-28 | 2009-03-05 | Ami Agrolinz Melamine International Gmbh | Verbundwerkstoff, Verwendung eines Verbundwerkstoffes und Verfahren zur Herstellung eines Verbundwerkstoffes |
CN101851385B (zh) * | 2010-06-07 | 2014-08-06 | 陈俊珂 | 一种竹粉复合材料、制备方法及其应用 |
EP2735584A1 (de) * | 2012-11-26 | 2014-05-28 | Basf Se | Thermoverformbarer Melaminharzschaumstoff mit partikelförmigem Füllmaterial |
FR3049281B1 (fr) * | 2016-03-24 | 2019-11-01 | Arkema France | Copolymere a blocs pour la protection de pieces a base de metaux |
CN105780182A (zh) * | 2016-05-10 | 2016-07-20 | 陈玲君 | 一种原生有色抗菌低熔点聚酯纤维及其制备方法、应用 |
CN109096955A (zh) * | 2018-09-05 | 2018-12-28 | 维大树脂化工(台山)有限公司 | 一种环保型胶粘剂的生产方法 |
CN109796923A (zh) * | 2019-02-26 | 2019-05-24 | 浙江久大纺织科技有限公司 | 一种uv光固化水性聚氨酯胶粘剂 |
CN109880288B (zh) * | 2019-03-21 | 2020-08-25 | 中国科学院兰州化学物理研究所 | 一种聚醚醚酮自润滑复合材料及其制备方法和应用 |
CN115198556B (zh) * | 2021-09-07 | 2023-08-29 | 杭州临安迪恩化工有限公司 | 一种三聚氰胺树脂固化剂及其制备方法 |
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DE2414427A1 (de) * | 1974-03-26 | 1975-10-23 | Cassella Farbwerke Mainkur Ag | Hitzehaertendes ueberzugsmittel in form einer dispersion |
US4119762A (en) * | 1976-10-20 | 1978-10-10 | Monsanto Company | Coating compositions comprising alkoxymethylaminotriazines and polyols |
AT398768B (de) * | 1991-08-05 | 1995-01-25 | Chemie Linz Gmbh | Modifizierte melaminharze sowie prepregs und laminate auf basis dieser melaminharze |
DE10117544B4 (de) * | 2001-04-07 | 2005-08-04 | Agrolinz Melamin Gmbh | Modifizierte Aminoplaste für Halbzeuge und Formstoffe verbesserter Elastizität, Verfahren zu ihrer Herstellung und ihre Verwendung |
DE10136321C1 (de) * | 2001-07-26 | 2002-12-12 | Agrolinz Melamin Gmbh Linz | Polymere aus Triazinderivaten |
ATE373035T1 (de) * | 2001-11-19 | 2007-09-15 | Ami Agrolinz Melamine Int Gmbh | Erzeugnisse, insbesondere formmassen aus triazinsegmente enthaltenden polymeren, verfahren zu deren herstellung und verwendungen |
AT411685B (de) * | 2002-06-14 | 2004-04-26 | Agrolinz Melamin Gmbh | Zusammensetzungen zur herstellung von aminoplasterzeugnissen |
AR040209A1 (es) * | 2002-06-14 | 2005-03-16 | Agrolinz Melamin Gmbh | Material de moldeo de amino resina para productos con flexibilidad mejorada y productos de amino resina con flexibilidad mejorada |
DE10246472A1 (de) * | 2002-09-27 | 2004-04-08 | Agrolinz Melamin Gmbh | Endlosfäden mit hoher Dimensionsstabilität, Hydrolysebeständigkeit und Flammfestigkeit |
DE10261804B4 (de) * | 2002-12-19 | 2008-05-21 | Ami-Agrolinz Melamine International Gmbh | Direktsyntheseverfahren zur Herstellung von veretherten Melaminharzkondensaten, Melaminharzkondensate und deren Verwendung |
DE10313198A1 (de) * | 2003-03-19 | 2004-09-30 | Ami-Agrolinz Melamine International Gmbh | Duroplastformmassen verbesserter Verarbeitbarkeit |
DE10313200A1 (de) * | 2003-03-19 | 2004-10-07 | Ami-Agrolinz Melamine International Gmbh | Prepregs für Faserverbunde hoher Festigkeit und Elastizität |
DE10333893A1 (de) * | 2003-07-22 | 2005-02-10 | Kompetenzzentrum Holz Gmbh | Kunststoffe und Holz enthaltende Verbundwerkstoffe |
DE10333892A1 (de) * | 2003-07-22 | 2005-02-10 | Ami-Agrolinz Melamine International Gmbh | Kunststofferzeugnis hoher Festigkeit und Flexibilität |
-
2006
- 2006-07-21 DE DE102006034608A patent/DE102006034608A1/de not_active Withdrawn
-
2007
- 2007-07-16 EP EP07786225A patent/EP2044135A1/de not_active Withdrawn
- 2007-07-16 WO PCT/EP2007/006476 patent/WO2008009464A1/de active Application Filing
Non-Patent Citations (1)
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See references of WO2008009464A1 * |
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WO2008009464A1 (de) | 2008-01-24 |
DE102006034608A1 (de) | 2008-02-14 |
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