EP1799733A1 - Resines de polyurethanne a groupes acides - Google Patents

Resines de polyurethanne a groupes acides

Info

Publication number
EP1799733A1
EP1799733A1 EP05786751A EP05786751A EP1799733A1 EP 1799733 A1 EP1799733 A1 EP 1799733A1 EP 05786751 A EP05786751 A EP 05786751A EP 05786751 A EP05786751 A EP 05786751A EP 1799733 A1 EP1799733 A1 EP 1799733A1
Authority
EP
European Patent Office
Prior art keywords
compounds
groups
acid
hydroxyl
acid groups
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP05786751A
Other languages
German (de)
English (en)
Inventor
Anton Arzt
Julius Burkl
Gudrun Garber
Gerlinde Petritsch
Markus Schafheutle
Achim VÖLKER
Jörg Wango
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Allnex Austria GmbH
Original Assignee
Cytec Surface Specialties Austria GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Cytec Surface Specialties Austria GmbH filed Critical Cytec Surface Specialties Austria GmbH
Priority to EP05786751A priority Critical patent/EP1799733A1/fr
Publication of EP1799733A1 publication Critical patent/EP1799733A1/fr
Withdrawn legal-status Critical Current

Links

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
    • 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
    • C08G18/30—Low-molecular-weight compounds
    • C08G18/36—Hydroxylated esters of higher fatty acids
    • 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

  • the invention relates to water-dilutable polyurethane resins having acid groups, a process for their preparation and their use as catalysts for the curing of binders containing hydroxyl groups with melamine-formaldehyde resins.
  • the curing of resins containing hydroxyl groups as functional groups can be carried out at room temperature with polyfunctional compounds such as isocyanates, the isocyanate hardener being added only immediately before application or even during application (two-component binder). It is also possible to use hardeners which become active only at elevated temperature (one-component binder), in which case the mixing of resin and hardener can take place before the application and the ready-formulated binders have sufficient storage stability. To accelerate the curing reaction at elevated temperature usually catalysts are added.
  • catalysts is always required when at least partially etherified aminoplast resins, ie reaction products of formaldehyde with Ami ⁇ oplastbüdnern as melamine, guanamines, ureas or mixtures thereof are used as a curing agent with lower aliphatic linear and branched alcohols having one to four carbon atoms.
  • the transesterification reaction occurring during the curing is usually catalysed by acid.
  • the catalysts used are preferably organic acids such as para-toluenesulfonic acid or derivatives thereof.
  • such low molecular weight compounds can be extracted from the cured paint film, they are also subject to low molecular compounds as the Chemicals Act and the Reststoffverord ⁇ ung.
  • Character can not be extracted from the cured paint film, and have at least as good effectiveness as the known catalysts. Furthermore, they should not adversely affect the mechanical and chemical properties of the cured paint film and not lead to discoloration or gloss drop of the paint film.
  • the invention therefore relates to water-dilutable polyurethane resins ABCD having acid groups, wherein the polyurethane resins contain components derived from oils A, which are at least partially unsaturated, of olefinically unsaturated aliphatic acids B or their anhydrides B ', of compounds C with functional groups reactive toward acid groups or acid anhydride groups selected from epoxide groups, hydroxyl groups, mercaptan groups and amino groups, which react with the compounds B or B 'to form an ester group, a thioester group or a
  • Acid amide react wherein the compounds C are selected from compounds C "which additionally contain sulfonic acid groups or by electron-attracting substituents activated carboxylic acid groups, and compounds C, which additionally contain at least one hydroxyl group which is obtained in the reaction with the compounds B or B ' and wherein at least a mass fraction of 25% of the compounds C from
  • Another object of the invention is a process for the preparation of water-dilutable, acid group-containing polyurethane resins ABCD comprising the steps of a) grafting an oil A with an olefinically unsaturated aliphatic acid B or the anhydride B 'of such an acid, b) polymer-analogous reaction of the adduct AB from step a) with a compound C having acid groups or acid anhydride reactive functional groups selected from epoxide groups, hydroxyl groups, mercaptan groups and amino groups which react on reacting with the compounds B or B 'to form an ester group, a thioester group or an acid amide group the
  • Compounds C are selected from compounds C ", which additionally contain sulfonic acid groups or by electron-attracting substituents activated carboxylic acid groups, and compounds C, which additionally contain at least one hydroxyl group which remains in the reaction with the compounds B or B ', wherein at least a mass fraction of 25% of the compounds C consists of compounds C ", and wherein the use of the
  • Binders with aminoplast resins, and stoving lacquers containing hydroxyl groups have binders, aminoplast resins and the water-dilutable polyurethane resins ABCD.
  • the acidity of the acid group is measured by its pKa value; if the pKa value is lower than that of acetic acid, its acidity is greater than that of acetic acid.
  • Suitable oils A are all drying and semi-drying oils having at least one olefinic double bond per molecule, in particular oils having an iodine value of 100 cg / g to 200 cg / g, for example, soybean oil, linseed oil, rapeseed oil, sunflower oil, tall oil, cottonseed oil, safflower oil, perilla oil and poppy seed oil. Also suitable are animal oils such as herring oil, menhaden oil or sardine oil. Particularly preferred are linseed oil, perilla oil, wood oil and tall oil.
  • Suitable acids B are in particular maleic acid, its anhydride, acrylic and methacrylic acid, vinylacetic acid, crotonic acid, itaconic, citraconic and mesaconic acid, and also tetrahydrophthalic acid and its anhydride.
  • Suitable compounds C contain functional groups reactive toward acid groups or acid anhydride groups and selected from epoxide groups, hydroxyl groups, mercaptan groups and amino groups which react with compounds B or B 'to form an ester group, a thioester group or an acid amide group, the compounds C being selected are from compounds C "which additionally contain sulfonic acid groups or by electron-attracting substituents activated carboxylic acid groups, and compounds C, which additionally contain at least one hydroxyl group which is obtained in the reaction with the compounds B or B ', and wherein at least a mass fraction of 25% the compounds C consists of compounds C ".
  • those compounds Cl are suitable which react with cyclic acid anhydrides with ring opening or with renewed formation of the cyclic structure, such as, for example Hydoxy (alkylene) amines having at least one primary amino group and at least one hydroxyl group, compounds C2 which react with acid anhydrides with addition and formation of a hydroxyl group, such as epoxy compounds, and compounds C3 which react with acids under addition or esterification and at least one not among the Conditions of the reaction under esterification with acid-reactive hydroxyl group, for example, a secondary or tertiary hydroxyl group.
  • cyclic acid anhydrides with ring opening or with renewed formation of the cyclic structure
  • compounds C2 which react with acid anhydrides with addition and formation of a hydroxyl group, such as epoxy compounds
  • compounds C3 which react with acids under addition or esterification and at least one not among the Conditions of the reaction
  • compounds of these classes Cl, C2 and C3 contain either at least one sulfonic acid group or electron attractive substituent activated carboxylic acid group and then form the class C "or additionally at least one hydroxyl group which is retained in the reaction with the compounds B or B ' then in class C. At least one
  • a mass fraction of 25%, preferably at least 30%, and especially at least 40% of the compounds C are those compounds C "which contain at least one acid group which causes the compound C to be a stronger acid than acetic acid, such as electron-withdrawing substituent activated carboxylic acid groups or particularly preferably sulphonic acid groups Suitable compounds C are, for example, ethanolamine, 2- and 3-
  • a suitable compound C is in particular taurine.
  • Suitable polyfunctional isocyanates D are aliphatic and aromatic isocyanates having at least two isocyanate groups per molecule, in particular diisocyanates such as aliphatic linear, branched and cyclic isocyanates such as 1,4-tetramethylene diisocyanate, 1,6-hexamethylene diisocyanate (HDI), 2,2, 4, - and 2,4,4-trimethylhexane diisocyanate, dodecamethylene diisocyanate, 1, 4-
  • diisocyanates such as aliphatic linear, branched and cyclic isocyanates such as 1,4-tetramethylene diisocyanate, 1,6-hexamethylene diisocyanate (HDI), 2,2, 4, - and 2,4,4-trimethylhexane diisocyanate, dodecamethylene diisocyanate, 1, 4-
  • IPDI isophorone diisocyanate
  • HMDI bis (4-isocyanatocyclohexyl) methyl
  • aromatic isocyanates such as 2,4- and 4-isocyanatocyclohexyl) -methyl (HMD
  • the acidic water-dilutable polyurethane resins obtainable according to the invention can be prepared inter alia in mixtures of water-dilutable binders and in particular as
  • the polyurethane resins preferably have a mass fraction of acid groups of from 0.5 cg / g to 5 cg / g, more preferably from 1.0 cg / g to 4.0 cg / g, and especially from 1.5 cg / g to
  • the mass fraction of acid groups is calculated by dividing the mass of the acid groups (-SO 3 H for sulfonic acids, -COOH for carboxylic acid groups, including the ionized acid groups in the protonated form in the calculation) in the resin by the mass of the resin solid. The information is given in "cg / g" or "%".
  • Example 1 Preparation of an adduct of linseed oil and maleic anhydride
  • Triethylamine added. To this biphasic mixture was at 80 0 C slowly rising temperature, wherein the boiling triethylamine was condensed and the Matters ⁇ mixture was fed back, 110 g of the product from Example 1 over 90 minutes added. After completion of the addition was heated to a maximum of 180 0 C and distilled off the TEA water azeotrope, wherein the TEA was recycled. After 140 g of water was removed from the reaction mixture, the TEA was removed by distillation under reduced pressure. There was obtained a viscous resin having an acid value of 37.4 mg / g and an amine value of less than 0.4 mg / g, which was clearly soluble in water.
  • Example 3 Preparation of an aqueous dispersion of an acidic polyurethane resin
  • Example 4 Aqueous dispersion of a high molecular weight chain-extended polyurethane resin
  • Isocyanate concentration was between 1.8% and 1.9%. Upon reaching this concentration the resin with 109.7 g of heated (70 0 C) and deionized water was dispersed. Immediately thereafter was chain-extended with a solution of 2.6 g of isophorone diamine in 12.6 g of deionized water. After a stirring time of 120 minutes, a finely divided dispersion with a non-volatile content of 36%, a viscosity (23 0 C, 25 s "1 ) of
  • Stabilizers 2.50 g of ®Tinuvin 384 and 1.20 g of ®Ti ⁇ uvin 123 (Ciba Specialty Chemicals), 45.00 g
  • Methoxypropylacetat, and 0.20 g ®Byk 310 (substrate wetting additive, Byk Chemie GmbH) was formulated a clearcoat having a spray viscosity corresponding to a flow time of 27 s, measured in a DIN 4 cup at 23 0 C (DIN 53 211).
  • VKl Para-Toluolsulfonklade ('TTSA', Affied Signal Riedel de Haen), solved to a
  • VK2 amine-blocked dodecylbenzenesulfonic acid (®Nacure 5225, King Industries)
  • the mass fraction w ⁇ of the catalyst is based on the mass of the solid in the
  • the precursor was formulated from 34.90 g ⁇ Vialkyd AN 951 / 70SNA (polyester resin, Surface Specialties Germany GmbH & Co. KG), 16.30 g rutile-type titanium dioxide pigment (Kronos titanium), 16.30 g carbon black (®Printex 300, DegussaHüls AG), 16.30 g of ®Blanc fixe micro (Sachtleben), 0.25 g ⁇ Aerosil 380 (finely divided silica, DegussaHüls AG), 2.00 g of 2-ethylhexanol, 6.50 g of methoxypropyl acetate and 6.10 g of ®Solvesso 150 (aromatic mixture with a medium
  • Boiling point of 150 0 C, Exxon Chemicals which were ground together in a bead mill at 50 ° C and 7000 min "1 for thirty minutes. Then, 0.20 g ⁇ Additol® XL (Surface Specialties Germany GmbH & Co. KG, leveling agents ), 14.80 g ⁇ Maprenal MF 590 / 55iBX (melamine crosslinking resin, Surface Specialties Germany GmbH & Co. KG), and 2.30 g of isobutanol were added, the mixture was at 2000 min ' 1 more 20 minutes at 25 ° C to
  • the thickness of the baked paint film was 40 ⁇ m to 50 ⁇ m.
  • a primer of an aqueous black paint ("Emerald Black", DuPont Performance Coatings GmbH & Co. KG) was sprayed at a pressure of 0.4 MPa to 0.5 MPa (4 to 5 bar); This gave a dry film thickness of 13 .mu.m to 17 .mu.m after drying for five minutes at room temperature and five minutes at 80.degree.
  • the clearcoat according to the above formulation was sprayed at 0.4 MPa (4 bar) air pressure and baked at 140 0 C for 20 minutes to a dry film thickness of 35 .mu.m to 45 .mu.m.
  • the coated gradient sheets were placed on a gradient oven preheated to 60 ° C (BYK-Gardner Furnace 2615), and with a Eppendorf Multipipette (4780), a 50 ⁇ l drop of this acid was applied to the heated sheet for 30 minutes each minute applied, then the plate is washed off with deionized water. The evaluation is made after 24 hours rest at room temperature. The time required for the first damage to the clearcoat film (4.1) to the complete destruction of the clearcoat film (4.2) until the first damage to the clearcoat film (4.1)
  • a gradient type 2615 from BYK-Gardner was heated to 30 0 C to 80 ° C, to a painted metal test panel solutions were the
  • the coated sheet was after
  • Scratch resistance determined with an Amtec-Kistler car wash according to DIN 55668. The tinned sheets are used for 10 washing cycles. Thereafter, the sheets are rinsed and the gloss according to test 2. is measured directly thereafter and after annealing at 60 0 C for 2 hours (so-called "refiow” condition). Re2eptur of the clearcoat:
  • the flow time (DIN cup, 4 mm, 23 ° C.) was 36 seconds; it was adjusted to 27.5 s by adding an additional 10 kg of methoxypropyl acetate (solids content by mass 51%). This clearcoat was divided into four portions, and sprayed as the topmost layer on the sheets prepared as described above.

Abstract

L'invention concerne des résines de polyuréthanne à groupes acides, renfermant des composants dérivés d'huiles A qui sont au moins partiellement insaturées, d'acides aliphatiques oléfiniquement insaturés B ou de leurs anhydrides B', de composés C présentant des groupes fonctionnels réactifs vis-à-vis de groupes acides ou de groupes anhydrides d'acide, sélectionnés à partir des groupes époxyde, hydroxyle, mercaptan et amino, qui réagissent, par mise en contact avec les composés B ou B', avec formation d'un groupe ester, d'un groupe thioester ou d'un groupe amide d'acide, lesdits composés C étant choisis à partir de composés C'' renfermant, en plus, des groupes acides sulfoniques ou des groupes acides carboxyliques activés par des substituants attirant les électrons, et de composés C' renfermant, en plus, au moins un groupe hydroxyle qui demeure intact lors de la réaction avec les composés B ou B', au moins 25 % en masse des composés C comprenant des composés C'', ainsi que des isocyanates polyfonctionnels D. L'invention concerne en outre un procédé de fabrication des produits précités, leur utilisation comme catalyseurs lors du durcissement de liants contenant des groupes hydroxyle avec des résines aminoplastes, et des laques à cuire renfermant ces catalyseurs.
EP05786751A 2004-10-07 2005-09-27 Resines de polyurethanne a groupes acides Withdrawn EP1799733A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05786751A EP1799733A1 (fr) 2004-10-07 2005-09-27 Resines de polyurethanne a groupes acides

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP04023925A EP1645581A1 (fr) 2004-10-07 2004-10-07 Résines polyuréthane comportant des groupements acides
PCT/EP2005/010410 WO2006040003A1 (fr) 2004-10-07 2005-09-27 Resines de polyurethanne a groupes acides
EP05786751A EP1799733A1 (fr) 2004-10-07 2005-09-27 Resines de polyurethanne a groupes acides

Publications (1)

Publication Number Publication Date
EP1799733A1 true EP1799733A1 (fr) 2007-06-27

Family

ID=34926887

Family Applications (2)

Application Number Title Priority Date Filing Date
EP04023925A Withdrawn EP1645581A1 (fr) 2004-10-07 2004-10-07 Résines polyuréthane comportant des groupements acides
EP05786751A Withdrawn EP1799733A1 (fr) 2004-10-07 2005-09-27 Resines de polyurethanne a groupes acides

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP04023925A Withdrawn EP1645581A1 (fr) 2004-10-07 2004-10-07 Résines polyuréthane comportant des groupements acides

Country Status (4)

Country Link
US (1) US20080249279A1 (fr)
EP (2) EP1645581A1 (fr)
JP (1) JP2008516021A (fr)
WO (1) WO2006040003A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2697320B1 (fr) * 2011-04-12 2015-11-25 BASF Coatings GmbH Composition de revêtement de vernis transparent contenant un solvant, procédé de fabrication et utilisation
ES2560031T3 (es) * 2011-12-20 2016-02-17 Medical Adhesive Revolution Gmbh Polímero de hidroxi-amino y su uso en adhesivos para tejido de poliurea-poliuretano
CN109111839A (zh) * 2018-07-17 2019-01-01 安徽江淮车轮有限公司 一种防紫外线涂料及其制备方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT388382B (de) * 1986-12-23 1989-06-12 Vianova Kunstharz Ag Verfahren zur herstellung von wasserverduennbaren lackbindemitteln und deren verwendung
JP3522376B2 (ja) * 1995-03-09 2004-04-26 関西ペイント株式会社 耐汚染性に優れた塗膜を形成できる塗料組成物
AT409134B (de) * 1999-02-04 2002-05-27 Solutia Austria Gmbh Oxydativ trocknende polyurethandispersionen
JP4479940B2 (ja) * 2000-10-25 2010-06-09 日本化薬株式会社 ウレタンオリゴマー、その樹脂組成物、その硬化物

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006040003A1 *

Also Published As

Publication number Publication date
JP2008516021A (ja) 2008-05-15
EP1645581A1 (fr) 2006-04-12
WO2006040003A1 (fr) 2006-04-20
US20080249279A1 (en) 2008-10-09

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