EP3374456A1 - Härtbare polymere - Google Patents
Härtbare polymereInfo
- Publication number
- EP3374456A1 EP3374456A1 EP16781427.6A EP16781427A EP3374456A1 EP 3374456 A1 EP3374456 A1 EP 3374456A1 EP 16781427 A EP16781427 A EP 16781427A EP 3374456 A1 EP3374456 A1 EP 3374456A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- polymer
- substituted
- unsubstituted
- reaction
- chromium
- 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- Withdrawn
Links
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
- C09D183/06—Polysiloxanes containing silicon bound to oxygen-containing groups
-
- 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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/06—Preparatory processes
- C08G77/08—Preparatory processes characterised by the catalysts used
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- 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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/14—Polysiloxanes containing silicon bound to oxygen-containing groups
-
- 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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/38—Polysiloxanes modified by chemical after-treatment
-
- 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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/14—Polysiloxanes containing silicon bound to oxygen-containing groups
- C08G77/16—Polysiloxanes containing silicon bound to oxygen-containing groups to hydroxyl groups
-
- 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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/20—Polysiloxanes containing silicon bound to unsaturated aliphatic groups
Definitions
- the invention is in the field of polymers, preferably polysiloxanes. It relates in particular to the preparation of (meth) acrylate-bearing polysiloxanes and their use for radiation-curing coatings.
- Epoxides are very versatile building blocks in organic and macromolecular chemistry.
- the large ring strain of the epoxides (> 20 kcal / mol) is responsible for their good reactivity towards nucleophiles (ring opening), thus allowing access to a number of interesting structures.
- nucleophiles ring opening
- carboxylic acids find application as nucleophiles, as this class of substances is often characterized by a favorable access.
- the use of catalysts is very often necessary since carboxylic acids have a lower nucleophilicity than, for example, the corresponding amines.
- polymeric epoxies such as, inter alia, bisphenol A type polyglycidyl compounds, epoxy-functional polymers of vinyl monomers, but also epoxy siloxanes indispensable for materials science and industry.
- Polysiloxanes containing acrylic acid ester groups (acrylate groups) have proven to be curable under high-energy radiation additives, eg. B. for printing inks and for the production of paint binders or for coating agents for plastic, paper, wood and metal surfaces, proven so far.
- the curing is preferably carried out at low temperatures and is by electron radiation or by UV radiation in the presence of prior art photoinitiators, such as. B. benzophenone and its derivatives (EP 1897917).
- catalysts For epoxide ring opening by acids, a number of catalysts are suitable.
- various catalysts for the reaction of glycidyl compounds with carboxylic acids are known from coating technology. For example, this reaction is often used as a crosslinking reaction to cure paints.
- certain metal compounds are further described.
- These catalysts known in the prior art often prove to be unselective and thus disadvantageous because they are able to cleave bonds in, for example, silicone chains and thus cause undesirable side reactions such as molecular weight reduction or skeletal rearrangement.
- these catalysts can also trigger undesirable side reactions on the silicone-bonded organic groups, such as the homopolymerization of epoxy groups, the reaction of carboxylic acids in amides or Michael additions of amines to acrylate groups or the radical homopolymerization of acrylates by redox reaction with a variety can be triggered by metal compounds.
- EP 1693359 describes the catalysis with certain weak Lewis acid borane compounds such as trisdimethylaminoborane. With a flash point of -20 ° C handling is difficult, so that the reaction is carried out at 70 ° C and leads to long reaction times.
- WO 0177240 describes the use of chromium salts for the ring opening of epoxidized siloxanes with acrylic acid and subsequent use of these materials in UV-curable release coatings.
- various solvents are used, which should ensure better mixing of the catalyst with the epoxy siloxane.
- the object of the present invention was to enable the provision of an economical production process for polymers, in particular (meth) acrylate group-carrying polymers.
- This object is achieved by the subject matter of the invention.
- This is a process for preparing polymer compositions (P), preferably polysiloxanes having at least one carboxylic acid ester group, in particular (meth) acrylate-bearing polysiloxanes, the process being carried out in the presence of reaction products (U) from (A) and (B), wherein (A) are metal salts and (B) is a reaction product of aldehydes and primary amines. If desired, both the formation of the reaction product (U) and the formation of the reaction product of aldehydes and primary amines with component (B) can be carried out in situ.
- the overall reaction can thus be carried out in such a way that one or more reagents develop during the course, which are reacted further in the same mixture, e.g.
- component (B) which is further reacted in the same mixture with (A) to give (U), in the presence of which the preparation of (P) can then take place.
- (meth) acrylate includes the derivatives, especially esters, of methacrylic acid and / or acrylic acid.
- This process enables a particularly economical production of polymers.
- a particular advantage of the method according to the invention is that less or no solvent has to be used. This leads to an increase in the space-time yield.
- Another advantage of the process according to the invention is that the distillation time can be reduced.
- Another advantage of the method according to the invention is that the amount of metal salt used, in particular the amount of chromium salt, can be reduced.
- Another advantage of the method according to the invention is that a reduction of the filtration time can be achieved. Overall, in each case results in a more economical production of polymers.
- the inventive method is characterized in that at least one epoxy group-bearing polymer, preferably polysiloxane, with one or more carboxylic acids, in particular comprising acrylic and / or methacrylic acid and / or other monocarboxylic acids, which are preferably free of Polymerization capable of double bonds are reacted.
- at least one epoxy group-bearing polymer preferably polysiloxane
- carboxylic acids in particular comprising acrylic and / or methacrylic acid and / or other monocarboxylic acids, which are preferably free of Polymerization capable of double bonds
- the polymers which can be prepared by the process according to the invention are therefore distinguished, according to a preferred embodiment of the invention, by containing at least one carboxylic acid ester group.
- the polymers resulting according to the invention are preferably (poly) siloxanes.
- a1 is 0 to 50, preferably ⁇ 10, in particular 2; a2 0 to 50, preferably ⁇ 10, in particular 0; a3 is 0 to 50, preferably 1-30, in particular>0; b1 10 to 5000, preferably 10 to 1000, in particular 10 to 500; b2 0 to 50, preferably 0 to 25, in particular 0; b3 0 to 50, preferably 0 to 25, in particular>0; c is 0 to 50, preferably 0 to 10, in particular 0; d is 0 to 50, preferably 0 to 10, in particular 0; with the proviso that at least one of the indices a3 and b3 is greater than 0, preferably greater than 1;
- R independently of one another identical or different linear or branched, saturated or unsaturated hydrocarbon radicals having 1 to 30 carbon atoms or aromatic hydrocarbon radicals having 6 to 30 carbon atoms, preferably alkyl radicals having 1 to 14 carbon atoms or monocyclic aromatics, furthermore preferably methyl, ethyl, propyl or phenyl, especially methyl;
- R 2 independently identical or different linear or branched, saturated or unsaturated hydrocarbon radicals which may be substituted by nitrogen or oxygen atoms, preferred hydrocarbons are alkyl radicals having 1 to 30 carbon atoms, which may be substituted by one or more hydroxy functions and / or nitrogen-carrying groups in which the nitrogen-carrying groups may be present in quaternary form as ammonium groups which may be substituted by an epoxide group and / or which may be substituted by one or more carboxyl, amino acid, and / or betaine groups, or R 2 is an aryl radical 6 to 30 carbon atoms or R 2 is a polyoxyalkylene radical of the formula (IV),
- e is 1 to 150, preferably 2 to 100, more preferably greater than 2, in particular 3 to 20, f is 0 or 1,
- R 7 or R 8 , and R 9 or R 0 are the same or independently of one another, are hydrogen, monovalent alkyl radicals having 1 to 12 carbon atoms and / or aryl radicals having 6 to 12 carbon atoms, which may also be further bonded with hydroxyl, methoxy, ethoxy , Methyl and / or ethyl groups, or R 7 and R 9 , as well as independently R 8 and R 0 may together form a ring which bound the atoms to the R 7 and R 9 , and R 8 and R 0 R 7 and R 8, and independently R 9 and R 0, may together form a ring having the atoms attached to R 7 and R 8 as well as R 9 and R 0 , these rings optionally also may be further substituted with hydroxy, methoxy, ethoxy, methyl and / or ethyl groups and / or saturated and / or unsaturated, wherein the individual fragments with the index e within the polyoxyalkylene of the formula
- x is 0 to 100, preferably> 0, in particular 1 to 50, x'O or 1
- y is 0 to 100, preferably> 0, in particular 1 to 50, preferably x + y is 1 to 50, more preferably greater than 1, in particular 2 to 20,
- R independently of one another hydrogen radical, substituted or unsubstituted C 1 -C 4 -alkyl, -C (O) NH-R ', - C (O) 0-R', -C (O) -R" 'with
- R m is substituted or unsubstituted C 1 -C 12 -alkyl-CH 2 -OR 1 , substituted or unsubstituted C 6 -C 12 -aryl group, preferably a benzyl group,
- Ci-Ci2-alkyl substituted or unsubstituted C6-Ci2-aryl group, substituted or unsubstituted C6-C3o-alkaryl, and
- R IV is Ci-Cso-alkyl, cyclic Cs-Cso-alkyl, preferably C9-C45-alkyl, cyclic C9-C45- preferably Ci3-C37-alkyl, cyclic C13-C37-alkyl,
- the various fragments of the siloxane chains indicated in the formula (I) may be randomly distributed or arranged in blocks.
- Statistical distributions can be constructed block by block with an arbitrary number of blocks and an arbitrary sequence or a randomized distribution, they can also be of alternating construction or also form a gradient over the chain, in particular they can also form all mixed forms.
- the indices used in formulas (I) and (IV) are to be regarded as numerical mean values of the statistical distributions mentioned. Wherever molecules or molecular fragments have one or more stereocenters or can be differentiated into isomers due to symmetries, or due to other effects e.g. with limited rotation, all possible isomers are included in the present invention.
- poly in the context of this invention comprises not only exclusively compounds having at least 3 repeating units of one or more monomers in the molecule, but in particular those compositions of compounds which have a molecular weight distribution and thereby have an average molecular weight of at least 200 g / mol
- This definition takes into account the fact that it is common practice in the field of technology considered to refer to such compounds as polymers, even if they do not appear to satisfy a polymer definition analogous to OECD or REACH directives.
- index numbers reproduced here and the value ranges of the specified indices can be understood as mean values of the possible statistical distribution of the actual structures present and / or their mixtures. This also applies to such as per se exactly reproduced structural formulas, such as for formula (I) and formula (IV).
- the process according to the invention provides in particular that an epoxy group-carrying polymer, preferably polysiloxane, is reacted with one or more carboxylic acids, in particular comprising acrylic and / or methacrylic acid and / or other monocarboxylic acids, which are preferably free from double bonds capable of polymerization.
- carboxylic acids in particular comprising acrylic and / or methacrylic acid and / or other monocarboxylic acids, which are preferably free from double bonds capable of polymerization.
- Polyepoxide compounds which are particularly suitable are bisphenol A or bisphenol F type polyglycidyl compounds and their perhydrogenated derivatives or glycidyl ethers of polyhydric alcohols, such as butanediol, hexanediol, cyclohexanedimethanol, glycerol, trimethylolpropane or pentaerythritol.
- epoxy-functional polymers of vinyl monomers e.g. monofunctional acrylates, methacrylates or styrene with proportionate use of e.g. Glycidylmethacrylat use.
- epoxysiloxanes especially those as described in DE 3820294, to which reference is hereby made and which is included as a reference. Also included are annular epoxysiloxanes and / or epoxy-containing cycles having the chain lengths 3-8.
- Suitable carboxylic acids are mono- and di- or higher-functional carboxylic acids.
- Suitable monocarboxylic acids are saturated and preferably unsaturated carboxylic acids, such as benzoic acid, cyclohexanecarboxylic acid, 2-ethylhexanoic acid, caproic acid, caprylic acid, capric acid, lauric acid, natural and synthetic fatty acids, in particular acrylic acid, methacrylic acid, dimeric acrylic acid or crotonic acid.
- Suitable dicarboxylic acids are phthalic, isophthalic, tetrahydrophthalic, hexahydrophthalic, cyclohexanedicarboxylic, maleic, fumaric, malonic, succinic, glutaric, adipic, azelaic, pimelic, suberic, sebacic, dodecanedioic and hydrogenated dimer fatty acids.
- a particularly preferred monocarboxylic acid is acetic acid.
- the inventive method is provided in the context of a preferred embodiment of the invention for the preparation of (meth) acrylate-bearing polymers, in particular (meth) acrylate-bearing polysiloxanes containing at least one (meth) acrylic acid ester group and is characterized in particular by the fact that at least one polysiloxane, the one or contains multiple epoxy groups, preferably contains multiple epoxy groups, is reacted with one or more carboxylic acids.
- the reaction is preferably carried out as an addition reaction.
- a ratio of epoxy groups to carboxylic acids of 1: 0.5-2, preferably 1: 0.6-1, 8, more preferably 1: 0.8-1, 5 applies.
- the inventive method can be carried out in the context of a preferred embodiment at a temperature of 10 to 200 ° C, preferably from 40 to 150 ° C, preferably from 80 to 140 ° C.
- the process of the invention can be carried out in the sense of a preferred embodiment, preferably at a pressure of 0.5 to 20 bar, preferably 1 to 5 bar, particularly preferably at atmospheric pressure.
- the process according to the invention can be carried out in the presence or in the absence of a solvent.
- Suitable solvents include propanol, butanol, glycol, modified glycols, methyl isobutyl ketone, ethyl acetate, butyl acetate, toluene, xylene and its isomers in question.
- the inventive method is characterized in terms of a preferred embodiment in that only small amounts of solvent must be used. It is possible to use ⁇ 20% by weight, preferably ⁇ 10% by weight, particularly preferably ⁇ 5% by weight, of solvent, based on the total reaction mixture. In particular, it is also possible to work in the absence of a solvent.
- reaction according to the invention can be carried out both in daylight and in the absence of light, preferably in daylight.
- the reaction according to the invention can be carried out both under inert conditions (nitrogen, argon) and under an atmosphere of oxygen and / or air, preferably under an air atmosphere.
- oxygen-depleted atmosphere for example, a nitrogen atmosphere containing ⁇ 10 vol .-% oxygen.
- reaction product (U) comprises the result of the interactions between (A) and (B), which lead to material transformations.
- the reaction product (U) can also be formed in situ, i. the process for the preparation of polymer compositions (P) is carried out in the presence of (A) and (B), which have the possibility of interaction and thus can form a reaction product.
- the reaction product (U) is used in the sense of a preferred embodiment in amounts of 0.001 to 5%, preferably 0.01 to 1%, particularly preferably 0.01 to 0.5%.
- metal salts may advantageously salts of di- or triply positively charged metals of the subgroups 3 to 12, especially metals of the 6th subgroup, in particular salts of chromium such as chromium (l ll) bromide, chromium (II) chloride, chromium (l ll) chloride, chromium (II) fluoride, chromium (II) nitrate, chromium (II) perchlorate, chromium (II) phosphate, chromium (III) sulfate, chromyl chloride, chromium oxide, potassium chromium (II) oxalate, chromium ( ll) acetate are used.
- chromium such as chromium (l ll) bromide,
- the metal salts preferably comprise chromium (III) salts, in particular chromium (III) acetate.
- the chromium salts may be present in the hydrate form and / or be anhydrous.
- (B) is a reaction product of aldehyde and primary amine, in particular a so-called Schiff base.
- the reaction product of aldehyde and primary amine can also be formed in situ, i. E. the process for the preparation of polymer compositions (P) is carried out in the presence of (A) and (B), which can also be formed in situ, wherein (A) and (B) have the possibility of interaction and thus can form a reaction product.
- Aldehydes which may advantageously be used are aliphatic and / or aromatic aldehydes, preferably aromatic aldehydes, preferably hydroxyl-bearing aldehydes, particularly preferably phenolic-bearing, in particular salicylaldehyde.
- primary amines it is possible to use primary mono- or polyamines, for example substituted or unsubstituted C 1 -C 30 -alkylamine, substituted or unsubstituted C 1 -C 30 -alkylamine having one or more triple bonds, substituted or unsubstituted C 1 -C 30 -alkylamine having one and / or or more double bonds, substituted or unsubstituted C6-C30-arylamine, substituted or unsubstituted C6-C30-heteroarylamine, substituted or unsubstituted C 1 -C 12 -alk-C 6 -C 12 -arylamine, substituted or unsubstituted C 1 -C 30 -alkyloxyamine, substituted or unsubstituted cyclic C 3 -C 30 -alkylamine, preferably fatty amines and fatty alcohol amines, particularly preferably primary fatty alcohol amines which are accessible from (preferably straight
- fatty amine is known to the person skilled in the art.
- a fatty amine is derived from the respective fatty acid long-chain amine having at least one carbon chain with> 8 C atoms, such as 8-24 C atoms.
- the names of fatty amines are often derived from the fat used, for example: cocosamine (coconut fatty amine), tallow amine (tallow fatty amine), etc. It is known by the skilled person that the reaction of aldehyde and amine is a condensation reaction in which water as Reaction product is formed.
- Aldehyde and amine can advantageously be mixed together in the ratio 1: 2, preferably 1: 1, 5, more preferably 1: 1, possibly with the aid of a drag and / or drying agent which removes the water from the reaction mixture.
- Possible desiccants are magnesium sulfate, sodium sulfate, zeolites, molecular sieves, etc., as entrainer all organic solvents can be used which form an azeotrope with water. These include, inter alia, aliphatic and aromatic alkanes such as hexane, cyclohexane, toluene, etc.
- reaction products (B) prepared from aldehyde and amine, in particular SchifT's bases, or their solutions in organic solvents may still contain residues of the aldehydes and / or amine used.
- (B) up to 10% by weight, preferably less than 8% by weight, more preferably less than 5% by weight, and in particular less than 5% by weight, of aldehyde and / or amine may be present.
- a residual content in the abovementioned limits or an addition of amine in the reaction with the epoxy-functional polysiloxanes may be advantageous.
- the preparation according to the invention of the reaction product (U) from (A) and (B) is advantageously carried out in such a way that there is a molar ratio of 1: 5 from (A) to (B), preferably 1: 3, particularly preferably 1: 2.
- the reaction according to the invention for the preparation of the reaction product (U) can be carried out at a temperature of 10 to 200 ° C, preferably from 20 to 150 ° C, preferably from 25 to 100 ° C.
- the reaction according to the invention for the preparation of the reaction product (U) may preferably be carried out at a pressure of 0.5 to 20 bar, preferably 1 to 5 bar, particularly preferably at atmospheric pressure.
- the reaction according to the invention for the preparation of the reaction product (U) can preferably be carried out at a pH of from 2 to 12, preferably from 4 to 10, particularly preferably from 5 to 8.
- the reaction according to the invention for the preparation of the reaction product (U) can be carried out in the presence or in the absence of a solvent.
- the reaction is carried out in the presence of polar and protic solvents such as methanol, ethanol, propanol, butanol, glycol, modified glycols.
- reaction according to the invention for the preparation of the reaction product (U) can be carried out both in daylight and in the absence of light, preferably in daylight.
- reaction according to the invention for the preparation of the reaction product (U) can be carried out both under inert conditions (nitrogen, argon) and under oxygen and / or air atmosphere, preferably under an air atmosphere.
- a subsequent distillation or purification of the reaction products may be advantageous.
- the distillation or purification can, for. B. with the aid of a rotary evaporator, preferably at a temperature of 20 to 250 ° C, preferably 40 to 180 ° C and more preferably 50 to 150 ° C.
- the pressure is preferably from 0 to 0.02 bar, preferably from greater than 0 to 0, 1 bar and more preferably from 0.000001 to 0.001 bar.
- the distillation or workup may be advantageous in particular for the separation of solvents.
- the resulting reaction products (U) from (A) and (B) can be used directly or worked up.
- the workup may, for. B. by extraction and subsequent filtration optionally using filter aids.
- Solvents suitable for the extraction of the process according to the invention are water or organic solvents or monophase or polyphase Mixtures thereof. Suitable organic solvents are, for. As ethyl acetate, butyl acetate, ethyl methyl ketone, xylene, toluene, chloroform, dichloromethane, hexane, petroleum ether, diethyl ether, polyether or ionic liquids.
- the process according to the invention for the preparation of polymer compositions (P) can preferably be carried out in such a way that it comprises three process steps, namely 1. preparation of a reaction product B, in particular a Schiff base (1st process step), and 2. reaction of the reaction product B, in particular the ship 'see base, with a metal salt to obtain the reaction product (U) (2nd step), and 3. preparation of carbonklareester inconveniencen polymers in the presence of the reaction product (U) (3rd step).
- a carboxylic acid ester-containing polymer (step 3) can be carried out both as a one-pot reaction, as successive separately carried out steps or else metered-controlled, but preferably as a one-pot reaction.
- the reaction can be carried out in a batch, semi-batch or continuous process. Particular preference is given to the one-pot reaction of process steps 2 and 3.
- the reaction product U is prepared "in situ” and subsequently made available directly for process step 3.
- in situ means the preparation of an initial compound and their immediate reuse in the same reaction vessel.
- the inventively available carboxylic acid ester-containing polymers containing at least one carboxylic acid ester group, z. B. be used for the preparation of preparations according to the invention.
- the preparations according to the invention are characterized in that they contain the carboxylic acid ester-containing polymers according to the invention containing at least one carboxylic acid ester group.
- the preparations of the invention may contain other additives such. B.
- siccatives leveling agents, dyes and / or color pigments, wetting agents, binders, reactive diluents, surfactants, thermally activatable initiators, photoinitiators, catalysts, emollients, emulsifiers, antioxidants, hydrotropes (or polyols), solids and fillers, pearlescing additives, insect repellents, anti -Fouling agents, nucleating agents, preservatives, optical brighteners, flame retardants, antistatic agents, propellants, plasticizers, perfumes, active ingredients, care additives, superfatting agents, solvents and / or viscosity modulators.
- Preferred additives are dyes and / or color pigments.
- Another object of the present invention is a polymer, preferably curable polymer, in particular curable (meth) acrylate-carrying polysiloxane, prepared by a method as described above.
- the curable polymer is preferably a radiation-curing polymer, in particular a UV curing agent. curing polymer.
- UV curable means that reactive materials are converted from a low molecular weight to a high molecular weight state by the action of UV radiation.
- Another object of the present invention is a reaction product which is formed by reaction of chromium salts, preferably chromium (III) salts, in particular chromium (III) acetate and a reaction product of aldehydes and fatty amines.
- chromium salts preferably chromium (III) salts, in particular chromium (III) acetate and a reaction product of aldehydes and fatty amines.
- Another object of the present invention is the use of the aforementioned reaction product as a catalyst in the preparation of polymer, preferably curable polymer, in particular curable (meth) acrylate-carrying siloxane, advantageously in the preparation of polymer as described above.
- curable polymer in particular curable (meth) acrylate-carrying siloxane
- Another object of the present invention is the use of the polymers according to the invention, preferably curable polymer, in particular curable (meth) acrylattragendem polysiloxane, in particular preparable as described above, as a release coating alone or in admixture with other additives such as preferably curing initiators, fillers, pigments, other siloxanes and / or acrylate systems and / or other additives, especially in admixture with other acrylated silicones.
- curable polymer in particular curable (meth) acrylattragendem polysiloxane, in particular preparable as described above
- additives such as preferably curing initiators, fillers, pigments, other siloxanes and / or acrylate systems and / or other additives, especially in admixture with other acrylated silicones.
- Another object of the present invention is a process for coating flat supports by applying curable polymer according to the invention, in particular curable (meth) acrylattragendem polysiloxane as described above or prepared as described above.
- a further subject of the invention is the use of the (meth) acrylate-bearing polysiloxanes according to the invention as radiation-curable abhesive coating compositions for laminar supports.
- the products according to the invention can be used directly as such. It is only necessary in the case of UV curing, the (meth) acrylate-bearing polysiloxanes to add a radical initiator. The addition takes place z. B. in amounts of 2 to 5 wt .-%, based on siloxane.
- radical initiator should be based on the wavelength spectrum of the radiation source used for curing.
- radical starters are known.
- free-radical initiators are benzophenone, its oximes or benzoin ethers.
- Such known modifying agents are siloxanes having groups which are chemically incorporated in the curing of the coating composition.
- Particularly suitable modifiers are siloxanes having hydrogen atoms bonded to Si atoms. These can u. a. cause a lowering of the viscosity of the coating composition, whereby their applicability is improved on flat carrier.
- additives to the coating compositions, which are enclosed as inert substances by the coating composition during the hardening.
- examples of such in the Coating composition distributed substances are fumed silica or polymers of fluorocarbons.
- Another object of the invention are radiation-curing coating compositions comprising
- polymer according to the invention preferably curable polymer, in particular curable (meth) acrylate-carrying polysiloxane, in particular preparable as described above,
- additives are selected from photoinitiators, photosensitizers, fillers, pigments, solvents, phosphorus-containing compounds which polymerize under UV light, stabilizers e.g. Phosphites or hindered amine light stabilizers (HALS), anti-misting additives and amine synergists,
- NMR Spectra of Polymers and Polymer Additives by A. Brandolini and D. Hills, 2000, Marcel Dekker, Inc.
- the spectra were measured with a Bruker Spectrospin spectrometer at room temperature recorded, the measurement frequency was at the recording of the proton spectra 400 MHz.
- Adogen® 163 D is a primary distilled lauryl amine
- Adogen® 172 D is a distilled primary oleyl amine of plant origin
- Adogen® 160 D is a distilled primary amine from coconut fatty acid.
- TEGO® RC 71 1 is a modified silicone acrylate. These are products of Evonik Industries AG.
- Synthetic Example 2 In 200 ml of toluene was dissolved 43.6 g of salicylaldehyde (Aldrich). Then, 100 g of Adogen 172 D (Evonik Industries, nitrogen value: 5.0%) was added and heated to 90 ° C. After 2.5 hours, a water separator was connected and stirred for a further 3 hours. After separation of the water of reaction, the distillation was carried out on a rotary evaporator at 70 ° C and ⁇ 1 mbar. From the H-NMR spectrum, a complete conversion of the aldehyde groups to the corresponding Schiff 's bases was detectable.
- Synthesis Example 5 20 g of Schiff 's base from Synthesis Example 2 were initially charged in 200 ml of ethanol. At room temperature, 1 1, 8 g of aqueous Cr (III) acetate solution (50% in water) was added. The clear, dark green solution was heated at reflux temperature (ca. 80 ° C) for 6 hours. Subsequently, the solvent was removed by distillation at 100 ° C on a rotary evaporator ( ⁇ 1 mbar). The result is a green / brownish and pasty liquid. The chromium content is 5.5%. Synthetic Example 6:
- thermometer and gas inlet were 227.7 g of lateral epoxysiloxane (Evonik Industries AG, epoxy value: 1, 37%), 0.05 g of methylhydroquinone, 0.05 g of para-methoxyphenol, 0.12 g of Reaction product from Synthesis Example 4 and finally 15.2 g of acrylic acid (Aldrich) with 0.8 g of acetic acid (Baker) submitted and heated with stirring and gas inlet (air) to 120 ° C. Subsequently, the acid number and thus the conversion were determined by means of a sample taken.
- thermometer In a heated glass flask with mechanical stirrer, thermometer and gas inlet were
- thermometer In a heated glass flask with mechanical stirrer, thermometer and gas inlet were
- Synthesis Example 1 1 In a heated glass flask with mechanical stirrer, thermometer and gas inlet were
- Synthetic Example 12 In a heated glass flask with mechanical stirrer, thermometer and gas inlet were
- Synthesis Example 13 In a heated glass flask with mechanical stirrer, thermometer and gas inlet, 227.7 g of epoxysiloxane from Synthesis Example 7, 0.05 g of methylhydroquinone, 0.05 g of para-methoxyphenol, 0.24 g of Cr (III) chloride hexahydrate (Aldrich ), 0, 1 g of Schiff 's base from Synthesis Example 3 and finally 15.2 g of acrylic acid (Aldrich) with 0.8 g of acetic acid (Baker) and heated with stirring and gas inlet (air) to 120 ° C. Subsequently, the acid number and thus the conversion were determined by means of a sample taken.
- Synthesis Example 14 In a heated glass flask with mechanical stirrer, thermometer and gas inlet, 292 g of epoxysiloxane from Synthesis Example 7, 0.06 g of methylhydroquinone, 0.06 g of para-methoxyphenol, 0.16 g of Cr (II) chloride (Aldrich), 1 , 2 g of the ship 'rule base from synthesis example 3, and finally 19.5 g of acrylic acid (Aldrich) with 1, 0 g of acetic acid (Baker) and heated to 120 ° C with stirring and gas inlet (air). Subsequently, the acid number and thus the conversion were determined by means of a sample taken.
- thermometer and gas inlet were 235 g of epoxy siloxane from Synthesis Example 8, 0.02 g of methylhydroquinone, 0.02 g of para-methoxyphenol, 0.06 g of Ru (III) acetate (Strem), 1, 2 g the Schiff 's base from Synthesis Example 2 and finally 17.4 g of acrylic acid (Aldrich) and heated to 1 15 ° C with stirring and gas inlet. Subsequently, the acid number and thus the conversion were determined by means of a sample taken. At a reaction time of 12 hours and a conversion of> 97%, the mixture was cooled, filtered and distilled at 120 ° C. From the H- and 29 Si NMR spectrum of an almost complete conversion of the epoxy groups to the corresponding Carbonklareestern was detectable; Viscosity: 1 10 mPa * s.
- Comparative Example 3 227.7 g of epoxysiloxane from synthesis example 7, 0.05 g of methylhydroquinone, 0.05 g of para-methoxyphenol, were placed in a heatable glass flask with mechanical stirrer, thermometer and gas inlet. 0.15 g of Adogen 163 D and finally 15.2 g of acrylic acid (Aldrich) with 0.8 g of acetic acid (Baker) and heated with stirring and gas inlet to 120 ° C. Subsequently, the acid number and thus the conversion were determined by means of a sample taken. After 12 hours of reaction time, the batch was stopped at a conversion of 67%, cooled, filtered and distilled at 120 ° C. From the H and 29 Si NMR spectrum, a conversion of 55% of the epoxy groups to the corresponding carboxylic acid esters was detectable; Viscosity: 3390 mPa * s.
- Release coatings are known in the art, preferably abhesive coatings on flat substrates, for use in adhesive tapes or label laminates.
- TEGO® RC 71 1 is generally recommended as an adhesion component.
- the coating compositions were stirred by hand stirring with a spatula until no more inhomogeneity was visible.
- the coating compositions were applied to a flat support. This was in all examples, a 50cm wide BOPP (oriented polypropylene) film which was previously subjected to a generator power of 1 kW corona pretreatment.
- the coating compositions were applied by means of a 5-roll coating unit from COATEMA® Coating Machinery GmbH, Dormagen, Germany with a basis weight of about 1 g / m 2 and by exposure to UV light of a medium pressure mercury vapor lamp of the company IST® Metz GmbH, Nürtingen Germany 60 W / cm at a web speed of 100 m / min under a nitrogen atmosphere with a residual oxygen content below 50 ppm cured.
- the release coatings were tested for rub-off, release value and residual adhesion Rub-off:
- the adhesion of the hardened coating to the substrate is checked by rubbing it with the thumb on the coating.
- rubbery crumbs form. Such crumbs should not arise even with intensive rubbing.
- the exam is carried out by a trained panel. The evaluation is categorized into school grades from 1 to 3, where 3 is insufficient.
- Grade 1 Very good scratch resistance and anchoring to the substrate. With linear and subsequent circular movement in the same place no crumbs are detectable.
- Release values are carried out in accordance with the test specification from FINAT Handbook 8th Edition, The Hague / NL, 2009 under the designation FTM 10, with the change that the storage is carried out under pressure at 40 ° C.
- Residual bond strength The residual bond strength is carried out in accordance with the test specification from FINAT Handbook 8th Edition, The Hague / NL, 2009 under the designation FTM 1 1, with the modification that the storage of the test adhesive strip in silicone contact is carried out for one minute and the standard surface is an untreated BoPP surface , The adhesive tape TESA®7475, trademark of tesa SE, Germany, Hamburg, was used.
- the residual adhesive power is a measure of the crosslinking of the silicones. If unpolymerized and therefore migratable silicone constituents are present, progressively lower residual bond strength values are achieved as the proportion of such components increases. Values above 80% are considered reasonable.
- Table 1 clearly shows the advantages of the invention.
- comparative examples 1 to 4 which are not according to the invention, have an increased viscosity compared with the synthesis examples. This can be clearly demonstrated in Synthesis Examples 8, 11 and 15, each having a viscosity of 99, 98 and 1 10 mPa * s and the corresponding comparative example having a viscosity of 324 mPa * s.
- the product of Comparative Example 4 has a significantly increased reaction time and an incomplete conversion, which leads to poor release values and residual adhesive forces.
- the synthesis example 15 shows that in addition to chromium salts, other metal salts can be used.
- Synthesis examples 7, 9, 10, 12, 13 and 14 with the corresponding comparative examples 1, 2 and 3 describe a similar picture. While the synthesis examples have a viscosity of about 600 to 900 mPa * s and a complete conversion after about 4 to 6 hours, the comparative examples are 1000 to about 3400 mPa * s at reaction times of 12 to 16 hours with poor conversions being too poor Release values and residual adhesive forces lead. The rub-off values also reflect the poor sales of the comparative examples. Further, by Synthesis Examples 13 and 14, it is clear that the invention is not limited only to chromium acetate salts. The conversions of Synthesis Examples 9 and 12 are to be understood as absolute values. Based on the reduced amount of acid used, the values correspond to a conversion of about 97%.
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Abstract
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CN (1) | CN108350314B (de) |
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BR (1) | BR112018007564B1 (de) |
CA (1) | CA3001930C (de) |
ES (1) | ES2676430T3 (de) |
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DE102014213507A1 (de) | 2014-07-11 | 2016-01-14 | Evonik Degussa Gmbh | Platin enthaltende Zusammensetzung |
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EP3029087A1 (de) | 2014-12-05 | 2016-06-08 | Evonik Degussa GmbH | Verfahren zur Herstellung von niedrigviskosen Polyethersiloxanen |
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EP3047845B1 (de) | 2015-01-26 | 2017-06-28 | Evonik Degussa GmbH | Silikongele für insbesondere kosmetische Anwendungen |
DK3050910T3 (en) | 2015-01-28 | 2017-02-27 | Evonik Degussa Gmbh | MODIFIED ALCOXYLING PRODUCTS, WHICH HAVE AT LEAST A NON-TERMINAL ALCOXYSILYL GROUP, WITH INCREASED STOCK STABILITY AND IMPROVED EXTENSION, AND THE POLYMES USED THEREOF |
EP3262104B1 (de) | 2015-02-28 | 2019-06-19 | Evonik Degussa GmbH | Oem-textilveredlungszusammensetzungen |
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PL3168273T3 (pl) | 2015-11-11 | 2018-10-31 | Evonik Degussa Gmbh | Polimery utwardzalne |
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DK3202816T3 (en) | 2016-02-04 | 2019-01-21 | Evonik Degussa Gmbh | ALCOXYSILYLY ADHESIVE TENSIONS WITH IMPROVED TIRE STRENGTH |
ES2814123T3 (es) | 2016-04-04 | 2021-03-26 | Evonik Operations Gmbh | Tratamiento de productos de alcoxilación catalizada de forma alcalina |
EP3263666B1 (de) | 2016-06-27 | 2018-06-27 | Evonik Degussa GmbH | Permeationsinhibierende trennbeschichtung |
WO2018001889A1 (de) | 2016-06-28 | 2018-01-04 | Evonik Degussa Gmbh | Zusammensetzung auf basis von polysiloxanen |
EP3272331B1 (de) | 2016-07-22 | 2018-07-04 | Evonik Degussa GmbH | Verfahren zur herstellung von siloxanen enthaltend glycerinsubstituenten |
-
2015
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- 2015-11-11 ES ES15194027.7T patent/ES2676430T3/es active Active
- 2015-11-11 EP EP15194027.7A patent/EP3168273B1/de active Active
- 2015-11-11 LT LTEP15194027.7T patent/LT3168273T/lt unknown
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2016
- 2016-10-13 JP JP2018521410A patent/JP6845851B2/ja active Active
- 2016-10-13 BR BR112018007564-7A patent/BR112018007564B1/pt active IP Right Grant
- 2016-10-13 WO PCT/EP2016/074554 patent/WO2017080747A1/de active Application Filing
- 2016-10-13 AU AU2016354296A patent/AU2016354296B2/en active Active
- 2016-10-13 CN CN201680065992.3A patent/CN108350314B/zh active Active
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Also Published As
Publication number | Publication date |
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CN108350314A (zh) | 2018-07-31 |
WO2017080747A1 (de) | 2017-05-18 |
EP3168273A1 (de) | 2017-05-17 |
BR112018007564B1 (pt) | 2022-04-26 |
PL3168273T3 (pl) | 2018-10-31 |
BR112018007564A2 (pt) | 2018-10-23 |
CA3001930A1 (en) | 2017-05-18 |
AU2016354296B2 (en) | 2021-04-08 |
TW201731923A (zh) | 2017-09-16 |
EP3168273B1 (de) | 2018-05-23 |
CA3001930C (en) | 2023-08-01 |
ES2676430T3 (es) | 2018-07-19 |
TWI723067B (zh) | 2021-04-01 |
AU2016354296A1 (en) | 2018-04-12 |
US20190048228A1 (en) | 2019-02-14 |
CN108350314B (zh) | 2021-09-07 |
US10407592B2 (en) | 2019-09-10 |
LT3168273T (lt) | 2018-09-10 |
JP2019504125A (ja) | 2019-02-14 |
JP6845851B2 (ja) | 2021-03-24 |
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