WO2013092807A1 - Aqueous polyacrylate copolymer dispersions with high oh group content - Google Patents
Aqueous polyacrylate copolymer dispersions with high oh group content Download PDFInfo
- Publication number
- WO2013092807A1 WO2013092807A1 PCT/EP2012/076293 EP2012076293W WO2013092807A1 WO 2013092807 A1 WO2013092807 A1 WO 2013092807A1 EP 2012076293 W EP2012076293 W EP 2012076293W WO 2013092807 A1 WO2013092807 A1 WO 2013092807A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- weight
- meth
- acrylate
- polyols
- free
- Prior art date
Links
Classifications
-
- 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
- C08L33/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur, or oxygen atoms in addition to the carboxy oxygen
-
- 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
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/02—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polycarbonates or saturated polyesters
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/0804—Manufacture of polymers containing ionic or ionogenic groups
- C08G18/0819—Manufacture of polymers containing ionic or ionogenic groups containing anionic or anionogenic groups
- C08G18/0823—Manufacture of polymers containing ionic or ionogenic groups containing anionic or anionogenic groups containing carboxylate salt groups or groups forming them
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4266—Polycondensates having carboxylic or carbonic ester groups in the main chain prepared from hydroxycarboxylic acids and/or lactones
- C08G18/4269—Lactones
- C08G18/4277—Caprolactone and/or substituted caprolactone
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/62—Polymers of compounds having carbon-to-carbon double bonds
- C08G18/6216—Polymers of alpha-beta ethylenically unsaturated carboxylic acids or of derivatives thereof
- C08G18/625—Polymers of alpha-beta ethylenically unsaturated carboxylic acids; hydrolyzed polymers of esters of these acids
- C08G18/6254—Polymers of alpha-beta ethylenically unsaturated carboxylic acids and of esters of these acids containing hydroxy 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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/703—Isocyanates or isothiocyanates transformed in a latent form by physical means
- C08G18/705—Dispersions of isocyanates or isothiocyanates in a liquid medium
- C08G18/706—Dispersions of isocyanates or isothiocyanates in a liquid medium the liquid medium being water
-
- 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
- C09D133/00—Coating compositions based on homopolymers or 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 only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
-
- 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
- C09D151/00—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers
- C09D151/08—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers grafted on to macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- 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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
Definitions
- Aqueous polyacrylate copolymer dispersions with high OH group content Aqueous polyacrylate copolymer dispersions with high OH group content
- the present invention relates to aqueous secondary copolymer dispersion comprising a copolymer (P) synthesized from a mixture of free-radically polymerizable monomers (M) comprising: (Ml) cycloaliphatic esters of acrylic and/or methylacrylic acid; (M3) hydroxy-functional, free-radically polymerizable monomers; (M4) carboxyl-functional, free-radically polymerizable monomers and (M5) hydroxyl- and carboxyl-free (meth)acrylic esters having CI to C12 hydrocarbon radicals in the alcohol moiety and/or vinylaromatics.
- M free-radically polymerizable monomers
- the invention also relates to a method for the production of such a dispersion, to the use of the dispersion as a coating and as a binder in 2K polyurethane coatings.
- Aqueous secondary copolymer dispersions enjoy widespread use in the art as coating materials and as binders.
- the term "secondary dispersions" refers to those aqueous dispersions which to start with are polymerized in a homogenous organic medium and thereafter are redispersed in an aqueous medium with neutralization, generally without the addition of external emulsifiers.
- US 2007/282049 Al relates to new, aqueous secondary copolymer dispersions, to a process for preparing them and to their use for producing high-grade coatings, especially for wood.
- the dispersions comprise a copolymer (P) synthesized from a mixture of free-radically polymerizable monomers (M) comprising (Ml) cycloaliphatic esters of acrylic and/or methylacrylic acid and also (M2) vinyl esters of aliphatic carboxylic acids.
- US 6,399,691 describes a hydroxy-functional copolymer P, which is present as a dispersion and/or solution in water, and is obtained by successively carrying out process steps A-D:A) initially introducing a hydrophobic polymer containing hydroxyl groups into a reaction vessel, B) introducing an initiator component into that vessel, C) subsequently polymerizing a hydrophobic monomer mixture containing hydroxyl groups in that vessel and D) subsequently polymerizing a hydrophilic monomer mixture containing hydroxyl and acid groups in that vessel.
- the present invention also relates to a process for the preparation of copolymers P following the procedure previously set forth and to coating compositions containing these copolymers P and one or more crosslinking agents.
- US 2004/034164 Al relates to an aqueous binder dispersion that includes at least one copolymer (P) containing carboxylic acid and/or carboxylate groups.
- the copolymer (P) includes structural units of carboxyl-free (meth)acrylic esters with a cycloaliphatic structure, and at least 25 mol % of the carboxylic acid groups of the copolymer (P) in the dispersion being present in triethanolamine- neutralized form.
- the aqueous binder can be used in aqueous coating materials, which can be used to coat a substrate. It would be desirable to improve the hardness of polyacrylate and 2K PUR-PAC coatings without compromising other parameters that are important to the end user.
- the present invention has the object of providing such polyacrylate dispersions.
- an aqueous secondary copolymer dispersion comprising a copolymer (P) synthesized from a mixture of free-radically polymerizable monomers (M) comprising:
- the polyacrylate dispersions according to the invention have high hydroxyl group contents so that, without wishing to be bound by theory, a higher degree of cross-linking and thus higher hardness of coatings may be achieved.
- acrylic acid or methacrylic acid are also defined as (meth)acrylic acid.
- Suitable monomers (Ml) are, for example, cyclohexyl (meth)acrylate, cyclohexyl (meth)acrylates ring-substituted with alkyl groups, 4-tert-butylcyclohexyl (meth)acrylate, norbornyl (meth)acrylate, isobomyl (meth)acrylate, preference being given to isobomyl acrylate and/or isobomyl methacrylate, and particular preference to isobomyl methacrylate.
- mixtures comprising isobomyl acrylate and isobomyl methacrylate and other monomers (Ml).
- the monomers (Ml) other than isobomyl acrylate and isobomyl methacrylate may optionally be used in amounts of less than 10% by weight, based on the sum of (Ml) to (M5).
- Suitable hydroxyl-functional monomers include ethylenically unsaturated, hydroxyl-containing monomers, such as hydroxyalkyl esters of unsaturated carboxylic acids, preferably hydroxyalkyl (meth)acrylates having 2 to 12, preferably 2 to 6, carbon atoms in the hydroxyalkyl radical.
- hydroxyalkyl (meth)acrylates having 2 to 12, preferably 2 to 6, carbon atoms in the hydroxyalkyl radical.
- particularly preferred compounds are 2-hydroxyethyl (meth)acrylate, the isomeric hydroxypropyl (meth)acrylates, 2-, 3- and 4-hydroxybutyl (meth)acrylates, and the isomeric hydroxyhexyl (meth)acrylates.
- Suitable carboxyl-functional free-radically polymerizable monomers are olefinically unsaturated monomers containing carboxylic acid or carboxylic anhydride groups, such as acrylic acid, methacrylic acid, beta-carboxyethyl acrylate, crotonic acid, fumaric acid, maleic anhydride, itaconic acid or monoalkyl esters of dibasic acids or anhydrides, such as maleic acid monoalkyl esters, for example. Acrylic acid and/or methacrylic acid are preferred.
- Hydroxyl- and carboxyl-free monomers (M5) employed are acrylates and methacrylates having 1 to 18 carbon atoms in the alcohol moiety of the ester group.
- the alcohol moiety is preferably aliphatic and may be linear or branched.
- Suitable monomers of component (M5) are methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert.-butyl, the isomeric pentyl, hexyl, 2-ethylhexyl, octyl and dodecyl (meth)acrylates.
- Particularly suitable vinylaromatics are styrene, optionally substituted styrenes and vinyltoluenes.
- Preferred monomers (M5) are methyl, n-butyl, isobutyl, tert-butyl (meth)acrylate and also 2- ethylhexyl acrylate and styrene.
- monomers (M6) such as acetoacetoxyethyl methacrylate, acrylamide, acrylonitrile, vinyl ethers, methacrylonitrile or vinyl acetates may also be present.
- monofunctional polyalkylene oxides having molecular weights of 200 to 3000 g mol, preferably 350 to 1000 g mol, or esterified (meth)acrylic acid, which are suitable as nonionic, hydrophilic groups.
- Suitable alkylene oxides include, preferably, ethylene oxide or mixtures of ethylene oxide and propylene oxide.
- the hydrophilicization of the copolymers takes place by ionic groups means monomers (M4).
- the proportions of the synthesis components (Ml) to (M6) may be chosen such that the copolymer (P) has an OH number (DIN 53240) of 200 to 400 mg KOH/g, preferably of 250 to 300 mg KOH/g solids.
- the average hydroxyl group functionality is at least 2,5.
- Suitable polyesterpolyols are the known polycondensates of poly(tri,tetra)ols and di- and also, where appropriate, poly(tri,tetra)-carboxylic acids or hydroxycarboxylic acids or lactones.
- polyesters instead of the free polycarboxylic acids it is also possible to use the corresponding polycarboxylic anhydride or corresponding polycarboxylic esters of lower alcohols to prepare the polyesters.
- suitable alcohols are trimethylolpropane, glycerol, eythritol, pentaerythritol, trimethylolbenzene or trishydroxyethylisocyanurate.
- dicarboxylic acids examples include phthalic acid, isophthalic acid, terephthalic acid, tetrahydrophthalic acid, hexahydrophthalic acid, cyclohexane-dicarboxylic acid, adipic acid, azelaic acid, sebacic acid, glutaric acid, tetrachloro-phthalic acid, maleic acid, fumaric acids, itaconic acid, malonic acid, suberic acid, 2-methylsuccinic acid, 3,3-diethylgiutaric acid and 2,2-dimethyl-succinic acid.
- the possible anhydrides of these acids are likewise suitable.
- the anhydrides are embraced by the expression "acid”.
- monocarboxylic acids such as benzoic acid, hexanecarboxylic acid or fatty acids, provided that the average functionality of the polyol is greater than 2.
- Saturated aliphatic or aromatic acids are preferred, such as adipic acid or isophthalic acid.
- polycarboxylic acids such as trimellitic acid.
- hydroxycarboxylic acids which can be used as reactants when preparing a polyesterpolyol having a terminal hydroxyl group, include hydroxycaproic acid, hydroxybutyric acid, hydroxy-decanoic acid or hydroxystearic acid.
- suitable lactones include ⁇ -caprolactone or butyrolactone.
- the hydroxyl-containing polycarbonates that are suitable are obtainable by reacting carbonic acid derivatives, e.g. diphenyl carbonate, dimethyl carbonate or phosgene, with polyols.
- carbonic acid derivatives e.g. diphenyl carbonate, dimethyl carbonate or phosgene
- polyols examples include ethylene glycol, 1,2- and 1,3-propanediol, 1,3- and 1,4-butanediol, 1,6-hexanediol, 1,8-octanediol, neopentyl glycol, 1 ,4-bishydroxymethylcyclohexane, 2-methyl- 1,3-propanediol, 2,2,4-trime- thylpentane-l,3-diol, dipropylene glycol, polypropylene glycols, dibutylene glycol, polybutylene glycols, bisphenol A, tetrabromobi
- the diol component preferably contains from 40 to 100% by weight of hexanediol, preferably 1,6-hexanediol and/or hexanediol derivatives, with particular preference to those which in addition to terminal OH groups contain ether groups or ester groups.
- the polycarbonate polyols include branching through the incorporation-of polyfunctional components, especially low molecular mass polyols.
- Examples of compounds suitable for this purpose include glycerol, trimethylolpropane, hexane- 1,2,6-triol, butane- 1,2,4-triol, trimethylolpropane, pentaerythritol, quinitol, marinitol and sorbitol, methyl glycoside or 1,3,4,6-dianhydrohexitols.
- the preparation of the copolymer (P) can in principle be carried out by means of conventional free- radical polymerization processes in organic phase.
- the copolymer (P) is preferably prepared in a multi-stage operation of the kind already described in EP-A 0 947 557 (p. 31.2 -p.
- the copolymerization is carried out in general at 40 to 180 °C, preferably at 80 to 160 °C.
- Suitable initiators (I) for the polymerization reaction include organic peroxides such as di-tert-butyl peroxide, for example, or tert-butyl peroxy-2-ethylhexanoate and azo compounds.
- organic peroxides such as di-tert-butyl peroxide, for example, or tert-butyl peroxy-2-ethylhexanoate and azo compounds.
- the initiator quantities employed depend on the desired molecular weight. For reasons of operational reliability and of greater ease of handling it is also possible to use peroxide initiators in the form of a solution in suitable organic solvents of the type already specified.
- the rate of addition of the initiator (I) in the process of the invention may be controlled such that it lasts until the end of the monomer feed (M), and the solvent quantities in steps one and two are chosen so as to result in an organic solvent content of less than 5% by weight.
- the amounts of the ingredients are preferably calculated so as to result in a mass ratio (V):(M) of 1:9 to 3:7 and (M1):(MII) of 9:1 to 6:4, with particular preference a mass ratio (V):(M) of 1.2:8.8 to 2:8 and (Ml):(MII) of 8.5:11.5 to 7:3.
- the free-radical polymerization can be carried out in the presence of a solvent or solvent/water mixture which is charged to the reaction vessel.
- Suitable organic solvents include any solvents that are known in paint technology, preference being given to those which are typically used as cosolvents in aqueous dispersions, such as alcohols, ethers, alcohols containing ether groups, esters, ketones or non-polar hydrocarbons, for example, or mixtures of these solvents.
- the solvents are used in amounts such that their level in the completed dispersion is 0% to 5% by weight, preferably 0,1% to 5% by weight.
- the number-average molecular weight Mn of the copolymers (P) can be controlled through a specific choice of the operating parameters, such as of the molar monomer/initiator ratio, for example, of the reaction time or of the temperature, and is situated in general at between 500 g/mol and 30 000 g mol, preferably between 1000 g/mol and 15 000 g/mol, more preferably between 1500 g/mol and 10 000 g/mol.
- the hydroxyl group content of the copolymers (P) in 100% form is preferably 1% to 5% by weight, preferably 1.5% to 4.5% by weight and with particular preference 1.75% to 3.5% by weight.
- Suitable neutralizing agents are organic amines or water-soluble inorganic bases, such as soluble metal hydroxides, metal carbonates or metal hydrogen carbonates, for example, such as sodium hydroxide or potassium hydroxide, for example.
- Suitable amines are butyldiethanolamine, N-methylmorpholine, triethylamine, ethyldiisopropylamine, N,N-dimethylethanolamine, N,N-dimethyl-isopropanolamine, N- methyldiethanolamine, diethylethanolamine, triethanolamine, butanolamine, morpholine, 2- aminomethyl-2-methylpropanol or isophoronediamine. In mixtures it is also possible, proportionally, to use ammonia. Particularly preferred are triethanolamine, N,N-dimethylethanolamine and ethyldiisopropylamine.
- the neutralizing agents are added in amounts such that in total the theoretical degree of neutralization [of the acid groups] is from 40% to 150%, preferably 60% to 120%.
- the degree of neutralization here is the ratio of added basic groups of the neutralizing component to acid functions of the copolymer.
- the pH of the aqueous copolymer dispersion of the invention is generally 6 to 10, preferably 6.5 to 9.
- the mixture of free-radically polymerizable monomers (M) does not comprise: (M2) vinyl esters of aliphatic carboxylic acids.
- M2 vinyl esters of aliphatic carboxylic acids.
- these monomers to be avoided are the esterification products of vinyl alcohol with linear or branched, aliphatic carboxylic acids such as, for example, vinyl acetate, vinyl propionate, vinyl butyrate, vinyl 2-ethylhexanoate, vinyl octanoate, vinyl decanoate, vinyl dodecanoate (vinyl laurate) or vinyl stearate.
- the copolymer (P) has a hydroxyl group content of > 5 weight-% to ⁇ 15 weight-%, preferably of > 7 weight-% to ⁇ 10 weight-%.
- the hydroxyl group content may be calculated by dividing the hydroxyl number (DIN 53240) by 33.
- the polyols (PO) have a hydroxyl group content of > 15 weight-% to ⁇ 35 weight-%, preferably of > 20 weight-% to ⁇ 30 weight-%.
- the hydroxyl group content may be calculated by dividing the hydroxyl number (DIN 53240) by 33.
- the polyols (PO) are polyester polyols obtained from the reaction of an at least trifunctional alcohol with a lactone.
- a much preferred polyol is obtained from trimethylolpropane and ⁇ -caprolactone.
- trimethylolpropane and ⁇ -caprolactone may be reacted in a weight ration of > 60:40 to ⁇ 80:20, preferably > 68:32 to ⁇ 72:28.
- the reaction may take place in the presence of a catalyst.
- (M3) is hydroxyethyl (meth)acrylate, hydroxypropyl (meth)acrylate and/or butanediol mono(meth)acrylate
- (M5) is styrene, methyl (meth)acrylate and/or n-butyl (meth)acrylate.
- the monomers (Ml), (M3), (M4) and (M5) are used in the following amounts: (Ml) > 5 weight-% to ⁇ 25 weight-% (preferably > 10 weight-% to ⁇ 20 weight-%)
- (M4) > 1 weight-% to ⁇ 10 weight-% (preferably > 2 weight-% to ⁇ 5 weight-%)
- the present invention is also directed towards a method for producing a dispersion according to the invention, comprising the step of free-radically polymerizing a mixture of monomers (M) comprising:
- (Ml) cycloaliphatic esters of acrylic and/or methylacrylic acid (M3) hydroxy-functional, free-radically polymerizable monomers (M4) carboxyl-functional, free-radically polymerizable monomers
- (M5) hydroxyl- and carboxyl-free (meth)acrylic esters having CI to C12 hydrocarbon radicals in the alcohol moiety and/or vinylaromatics
- the mixture further comprises polyols (PO) selected from the group of polyester polyols and/or polycarbonate polyols, the polyols having an average hydroxyl group functionality of at least 2.
- the polyols (PO) are polyester polyols obtained from the reaction of an at least trifunctional alcohol with a lactone.
- a much preferred polyol is obtained from trimethylolpropane and ⁇ -caprolactone.
- trimethylolpropane and ⁇ -caprolactone may be reacted in a weight ration of > 60:40 to ⁇ 80:20, preferably > 68:32 to ⁇ 72:28.
- the reaction may take place in the presence of a catalyst.
- (M3) is hydroxyethyl (meth)acrylate, hydroxypropyl (meth)acrylate and/or butanediol mono(meth)acrylate
- (M5) is styrene, methyl (meth)acrylate and/or n-butyl (meth)acrylate.
- the monomers (Ml), (M3), (M4) and (M5) are used in the following amounts: (Ml) > 5 weight-% to ⁇ 25 weight-% (preferably > 10 weight-% to ⁇ 20 weight-%) (M3) > 25 weight-% to ⁇ 45 weight-% (preferably > 30 weight-% to ⁇ 40 weight-%) (M4) > 1 weight-% to ⁇ 10 weight-% (preferably > 2 weight-% to ⁇ 5 weight-%) (M5) > 25 weight-% to ⁇ 45 weight-% (preferably > 30 weight-% to ⁇ 40 weight-%) and the polyols (PO) in amounts of > 5 weight-% to ⁇ 20 weight-% (preferably > 8 weight-% to ⁇ 15 weight-%), based on the total weight of the solids in the dispersion, the amounts given adding up to ⁇ 100 weight-%.
- Another aspect of the invention is the use of a dispersion according to the invention as a coating material.
- the invention is further concerned with the use of a dispersion according to the invention as a binder for aqueous two-component polyurethane coatings in combination with crosslinkers (X).
- Crosslinkers (X) used are preferably polyisocyanates.
- Such polyisocyanates have two or more NCO groups per molecule and are based for example on isophorone diisocyanate, hexamethylene diisocyanate, 1,4-diisocyanatocyclohexane, bis(4-isocyanatocyclohexane)methane, 1,3- diisocyanatobenzene, triisocyanatononane or the isomeric 2,4- and 2,6-TDI, and may further contain urethane, isocyanurate and/or biuret groups.
- polyisocyanates may also be blocked.
- low-viscosity polyisocyanates of the abovementioned kind based on aliphatic or cycloaliphatic isocyanates.
- these may also be hydrophilicized.
- the polyisocyanates used as crosslinkers generally have a viscosity at 23 °C of 10 to 5000 mPas and may also be employed, if desired in order to adjust viscosity, in a blend with small amounts of inert solvents.
- the copolymers of the invention are generally hydrophilic enough that even hydrophobic crosslinker resins can be dispersed without additional emulsifiers. However, this is not to rule out the use of external emulsifiers.
- Water-soluble or dispersible polyisocyanates are obtainable for example by modification of carboxylate, sulphonate and/or polyethylene oxide groups and/or polyethylene oxide/polypropylene oxide groups.
- the polyisocyanates can be made hydrophilic by means for example of reaction with substoichiometric amounts of monohydric, hydrophilic polyether alcohols.
- the preparation of hydrophilicized polyisocyanates of this kind is described for example in EP-A 0 540 985 (p. 3, 1.55 to p. 4, 1.5).
- Also highly suitable are the polyisocyanates containing allophanate groups that are described in EP-A 959 087 (p.
- the ratio of the hydroxyl groups of the binder component to the isocyanate groups of the crosslinker (X) is typically 3:1 to 1:5, preferably 2:1 to 1:3 and with particular preference 1:1 to 1:2.
- aqueous two-component polyurethane coating material comprising a dispersion according to the invention and isocyanate-group containing crosslinkers (X).
- the crosslinkers (X) comprise 1,6-hexamethylene diisocyanate and/or diphenylmethane diisocyanate and/or oligomers or reaction products of hexamethylene diisocyanate and/or diphenylmethane.
- the coating materials comprising the aqueous secondary dispersions of the invention can be applied to any desired substrates, examples being wood, metal, plastic, paper, leather, textiles, felt, glass or mineral substrates, and also the substrates which have already been coated.
- One particularly preferred application is the use of the aqueous coating materials for producing coatings on absorbent substrates such as wood or open-pored, mineral substrates, for example.
- a preferred substrate is wood.
- articles of wood coated with coating materials comprising the aqueous secondary dispersions of the invention.
- the coating materials can be used as they are or in combination with further auxiliaries and adjuvants known from coating technology, such as fillers and pigments, for example.
- the coating materials comprising the secondary dispersions of the invention can be applied in known ways, such as by spreading, pouring, knife coating, injecting, spraying, spin coating, rolling or dipping, for example.
- Pendulum hardness tests were performed according to DIN EN ISO 1522, gloss according to ISO 2813/ DIN 67530 and haze according to ISO 13803. The solids contents are determined as specified in DIN-EN ISO 3251.
- a polyester polyol was prepared from 9466 g (70,12 weight-%) trimethylolpropane, 4034 g (29,88 weight-%) ⁇ -caprolactone and 6,75 g (0,05 weight-%) of Desmorapid® Z (dibutyltin dilaurate catalyst).
- the resulting polyol had a viscosity (23 °C, VT 500) of 4524 mPa s (17,93/s), an acid number (DIN 53402) of 0,7 mg KOH/g, an OH number (DIN 53240) of 881 mg KOH/g and an OH content of 26,7 weight-%.
- a polyacrylate copolymer dispersion was prepared using the following components:
- a polyacrylate copolymer dispersion was prepared using the following components:
- Part 1 was charged to a 30 L reactor with stirrer, reflux condenser, temperature measurement and monomer feed apparatus (dropping funnel) and blanketed with a gentle stream of nitrogen for 1 hour. The batch was then heated to 138 °C with stirring. After the temperature had been reached, part 2 was added over the course of 20 minutes. Immediately thereafter, in parallel, parts 3 and 4 were metered in over 4,5 hours, optionally with cooling. Following complete addition, the batch was held at 138 °C for 0,5 hours. Subsequently parts 5 and 6 were metered in over 1,5 hours. Subsequently the batch was held at 138 °C for an hour, then cooled to 120 °C. The pressure was lowered to below 2,5 bar and a sample of 6000 g was taken. Under cooling to 95 °C part 7 was added and the mixture was stirred for 30 minutes. Part 8 was added over the course of 30 minutes to carry out dispersion, followed by stirring at 75 °C for 2 hours.
- Coating formulations were prepared using the following components, the amounts given being weight parts: Bayhydrol® XP 2695 64,84
- Hardener cone in wt-% 70,7 76,6 73,1
- the coatings were applied at 23 °C and a relative humidity of 45% using a 1,4 mm nozzle and subjected to the following tests:
- UV-B light exposition showed a good performance after 1000 hours of the coating according to the invention when compared to comparative examples 1 and 2.
- Coating formulations were prepared using the dispersion of example 2.1 and various polyisocyanates. After drying the resulting films were treated with 30% H2SO4 and the chemical resistance was tested:
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Polymers & Plastics (AREA)
- Medicinal Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Dispersion Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Paints Or Removers (AREA)
- Polyurethanes Or Polyureas (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014548001A JP6159736B2 (en) | 2011-12-22 | 2012-12-20 | Polyacrylate copolymer aqueous dispersion with high OH group content |
US14/366,277 US9574078B2 (en) | 2011-12-22 | 2012-12-20 | Aqueous polyacrylate copolymer dispersions with high OH group content |
CN201280063233.5A CN103998479B (en) | 2011-12-22 | 2012-12-20 | Water polyacrylic acid copolymer dispersion with high OH group contents |
ES12810260.5T ES2557567T3 (en) | 2011-12-22 | 2012-12-20 | Aqueous dispersions of polyacrylate copolymer with a high OH group content |
CA2859861A CA2859861A1 (en) | 2011-12-22 | 2012-12-20 | Aqueous polyacrylate copolymer dispersions with high oh group content |
EP12810260.5A EP2794702B1 (en) | 2011-12-22 | 2012-12-20 | Aqueous polyacrylate copolymer dispersions with high oh group content |
KR1020147016655A KR20140107275A (en) | 2011-12-22 | 2012-12-20 | Aqueous polyacrylate copolymer dispersions with high oh group content |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11195286 | 2011-12-22 | ||
EP11195286.7 | 2011-12-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013092807A1 true WO2013092807A1 (en) | 2013-06-27 |
Family
ID=47504964
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2012/076293 WO2013092807A1 (en) | 2011-12-22 | 2012-12-20 | Aqueous polyacrylate copolymer dispersions with high oh group content |
Country Status (8)
Country | Link |
---|---|
US (1) | US9574078B2 (en) |
EP (1) | EP2794702B1 (en) |
JP (1) | JP6159736B2 (en) |
KR (1) | KR20140107275A (en) |
CN (1) | CN103998479B (en) |
CA (1) | CA2859861A1 (en) |
ES (1) | ES2557567T3 (en) |
WO (1) | WO2013092807A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3538583A1 (en) * | 2016-11-14 | 2019-09-18 | Covestro Deutschland AG | Dual-curing isocyanurate polymers |
CN106753072A (en) * | 2016-12-02 | 2017-05-31 | 陈佩珊 | A kind of water-base resin adhesive |
US20210340299A1 (en) * | 2018-08-30 | 2021-11-04 | Dic Corporation | Polycarbonate-modified acrylic resin, paint, and plastic molded article painted by said paint |
CN114341217A (en) * | 2019-10-07 | 2022-04-12 | Dic株式会社 | Aqueous resin composition, aqueous coating material, and plastic molded article coated with the aqueous coating material |
JP7024927B2 (en) * | 2019-12-20 | 2022-02-24 | Dic株式会社 | Polycarbonate modified acrylic resin, paint and plastic molded products painted with the paint |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0540985A1 (en) | 1991-11-07 | 1993-05-12 | Bayer Ag | Water-dispersible polyisocyanate mixtures |
EP0947557A2 (en) | 1998-03-30 | 1999-10-06 | Bayer Aktiengesellschaft | Copolymer dispersions, binder combinations based on copolymer dispersions, process for preparing the same and using the same |
EP0959087A1 (en) | 1998-05-22 | 1999-11-24 | Bayer Aktiengesellschaft | Water-dispersable polyether-modified mixtures of polyisocyanates |
EP1024184A1 (en) | 1999-01-29 | 2000-08-02 | Bayer Aktiengesellschaft | Aqueous coating composition, process for production and use thereof |
DE19918132A1 (en) * | 1999-04-21 | 2000-11-02 | Ppg Ind Lacke Gmbh | Polymer for coating materials, e.g. basecoats for cars, made by emulsion polymerisation of ethylenic monomers in presence of polyester-polyol, polyurethane or polyacrylate, followed by reaction with crosslinker |
DE10007821A1 (en) | 2000-02-21 | 2001-08-23 | Bayer Ag | Water-dispersible polyisocyanate mixtures |
DE10024624A1 (en) | 2000-05-18 | 2001-11-22 | Bayer Ag | Modified polyisocyanates, e.g. useful in coating compositions, obtained by reacting polyisocyanates with 2-(cyclohexylamino)ethanesulfonic acid and/or 3-(cyclohexylamino)propanesulfonic acid |
US20040034164A1 (en) | 2002-08-16 | 2004-02-19 | Martin Melchiors | Aqueous binder dispersions as coating compositions |
DE102004054446A1 (en) * | 2004-11-11 | 2006-05-18 | Bayer Materialscience Ag | Preparation of polyester polyacrylate-graft polymer dispersion with co-solvent, useful to prepare e.g. clear lacquers, comprises preparing a copolymer of vinyl monomers and dispersing the copolymer in water |
WO2006134488A2 (en) * | 2005-06-16 | 2006-12-21 | Basf Coatings Japan Ltd. | Thermosetting paint compositions |
EP1862485A1 (en) * | 2006-05-30 | 2007-12-05 | Bayer MaterialScience AG | Aqueous co-polymer dispersions with improved resistance to caking |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
PL199178B1 (en) * | 1999-04-21 | 2008-08-29 | Ppg Ind Lacke Gmbh | Polymer |
DE19955129A1 (en) * | 1999-11-17 | 2001-05-23 | Bayer Ag | New, high-solids binder combinations and their use |
DE10361274A1 (en) * | 2003-12-24 | 2005-07-28 | Bayer Materialscience Ag | Low-solvent, OH-functional dispersions |
DE102004003894A1 (en) * | 2004-01-27 | 2005-08-11 | Bayer Materialscience Ag | Low-solvent, OH-functional dispersions II |
DE102005010694A1 (en) * | 2005-03-09 | 2006-09-14 | Bayer Materialscience Ag | Aqueous copolymer dispersions with reactive diluents |
-
2012
- 2012-12-20 CN CN201280063233.5A patent/CN103998479B/en active Active
- 2012-12-20 EP EP12810260.5A patent/EP2794702B1/en active Active
- 2012-12-20 CA CA2859861A patent/CA2859861A1/en not_active Abandoned
- 2012-12-20 US US14/366,277 patent/US9574078B2/en active Active
- 2012-12-20 WO PCT/EP2012/076293 patent/WO2013092807A1/en active Application Filing
- 2012-12-20 KR KR1020147016655A patent/KR20140107275A/en not_active Application Discontinuation
- 2012-12-20 JP JP2014548001A patent/JP6159736B2/en not_active Expired - Fee Related
- 2012-12-20 ES ES12810260.5T patent/ES2557567T3/en active Active
Patent Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0540985A1 (en) | 1991-11-07 | 1993-05-12 | Bayer Ag | Water-dispersible polyisocyanate mixtures |
EP0947557A2 (en) | 1998-03-30 | 1999-10-06 | Bayer Aktiengesellschaft | Copolymer dispersions, binder combinations based on copolymer dispersions, process for preparing the same and using the same |
EP0959087A1 (en) | 1998-05-22 | 1999-11-24 | Bayer Aktiengesellschaft | Water-dispersable polyether-modified mixtures of polyisocyanates |
US6399691B1 (en) | 1999-01-29 | 2002-06-04 | Bayer Aktiengesellschaft | Aqueous copolymers, a process for their preparation and their use in coating compositions |
EP1024184A1 (en) | 1999-01-29 | 2000-08-02 | Bayer Aktiengesellschaft | Aqueous coating composition, process for production and use thereof |
DE19918132A1 (en) * | 1999-04-21 | 2000-11-02 | Ppg Ind Lacke Gmbh | Polymer for coating materials, e.g. basecoats for cars, made by emulsion polymerisation of ethylenic monomers in presence of polyester-polyol, polyurethane or polyacrylate, followed by reaction with crosslinker |
DE10007821A1 (en) | 2000-02-21 | 2001-08-23 | Bayer Ag | Water-dispersible polyisocyanate mixtures |
DE10024624A1 (en) | 2000-05-18 | 2001-11-22 | Bayer Ag | Modified polyisocyanates, e.g. useful in coating compositions, obtained by reacting polyisocyanates with 2-(cyclohexylamino)ethanesulfonic acid and/or 3-(cyclohexylamino)propanesulfonic acid |
US20040034164A1 (en) | 2002-08-16 | 2004-02-19 | Martin Melchiors | Aqueous binder dispersions as coating compositions |
DE102004054446A1 (en) * | 2004-11-11 | 2006-05-18 | Bayer Materialscience Ag | Preparation of polyester polyacrylate-graft polymer dispersion with co-solvent, useful to prepare e.g. clear lacquers, comprises preparing a copolymer of vinyl monomers and dispersing the copolymer in water |
WO2006134488A2 (en) * | 2005-06-16 | 2006-12-21 | Basf Coatings Japan Ltd. | Thermosetting paint compositions |
EP1862485A1 (en) * | 2006-05-30 | 2007-12-05 | Bayer MaterialScience AG | Aqueous co-polymer dispersions with improved resistance to caking |
US20070282049A1 (en) | 2006-05-30 | 2007-12-06 | Bayer Materialscience Ag | Aqueous copolymer dispersions with improved blocking resistance |
Also Published As
Publication number | Publication date |
---|---|
ES2557567T3 (en) | 2016-01-27 |
CN103998479A (en) | 2014-08-20 |
EP2794702A1 (en) | 2014-10-29 |
US9574078B2 (en) | 2017-02-21 |
JP2015509989A (en) | 2015-04-02 |
CN103998479B (en) | 2017-12-08 |
CA2859861A1 (en) | 2013-06-27 |
KR20140107275A (en) | 2014-09-04 |
US20140316051A1 (en) | 2014-10-23 |
EP2794702B1 (en) | 2015-12-16 |
JP6159736B2 (en) | 2017-07-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US9574078B2 (en) | Aqueous polyacrylate copolymer dispersions with high OH group content | |
EP2630174B1 (en) | Aqueous preparations having soft-feel properties | |
US7005470B2 (en) | Aqueous 2K PUR systems | |
CN110300771B (en) | Aqueous coating composition | |
CA2590350C (en) | Aqueous copolymer dispersions with improved blocking resistance | |
US9593256B2 (en) | Low-solvent polyacrylate copolymer dispersions | |
CN112041367A (en) | Aqueous composition containing uretdione groups and process for its preparation | |
US20030195285A1 (en) | Aqueous alkyd and vinyl polymer dispersions | |
CA2234377C (en) | Aqueous coating composition | |
WO2012130764A1 (en) | Use of an aqueous preparation for the coating of wood surfaces to achieve a natural-touch effect | |
JP4381090B2 (en) | Method for producing urethane-acrylic particle mixture aqueous dispersion | |
TW201341416A (en) | Low-solvent polyacrylate copolymer dispersions | |
US20210017323A1 (en) | Aqueous uretdione group-containing compositions and method for producing same |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 12810260 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2012810260 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 20147016655 Country of ref document: KR Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14366277 Country of ref document: US |
|
ENP | Entry into the national phase |
Ref document number: 2859861 Country of ref document: CA |
|
ENP | Entry into the national phase |
Ref document number: 2014548001 Country of ref document: JP Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |