EP0280730A1 - Compositions d'appret a base d'eau et comprenant des parties acryliques greffees sur un urethane d'ester epoxyde - Google Patents

Compositions d'appret a base d'eau et comprenant des parties acryliques greffees sur un urethane d'ester epoxyde

Info

Publication number
EP0280730A1
EP0280730A1 EP87908023A EP87908023A EP0280730A1 EP 0280730 A1 EP0280730 A1 EP 0280730A1 EP 87908023 A EP87908023 A EP 87908023A EP 87908023 A EP87908023 A EP 87908023A EP 0280730 A1 EP0280730 A1 EP 0280730A1
Authority
EP
European Patent Office
Prior art keywords
epoxy ester
acrylic
dispersion
graft
urethane
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Withdrawn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
EP87908023A
Other languages
German (de)
English (en)
Other versions
EP0280730A4 (en
Inventor
Jozef Theresia Huybrechts
Victor Roger Vleminckx
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of EP0280730A1 publication Critical patent/EP0280730A1/fr
Publication of EP0280730A4 publication Critical patent/EP0280730A4/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • C09D175/06—Polyurethanes from polyesters
    • 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
    • C08F283/006—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polymers provided for in C08G18/00
    • 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
    • C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
    • C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
    • C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
    • C08G59/42—Polycarboxylic acids; Anhydrides, halides or low molecular weight esters thereof
    • C08G59/4246—Polycarboxylic acids; Anhydrides, halides or low molecular weight esters thereof polymers with carboxylic terminal groups
    • C08G59/4269—Macromolecular compounds obtained by reactions other than those involving unsaturated carbon-to-carbon bindings

Definitions

  • This invention relates to epoxy ester urethane polymers having acrylic portions grafted thereto. More particularly, it relates to coating compositions containing such polymers.
  • Epoxy graft acrylic water-based primer surfacers are claimed in U.S. 4,564,648, of January 14, 1986 - Huybrechts and Vlerainckx, but they do not include urethane grafts.
  • the present invention is an improvement over this one in giving better chip resistance over well cured electrocoats. for instance. This requires a careful balance of flexibility and hardness in different portions of the polymer.
  • the present invention provides a dispersion in water, in percentages by weight based on the total dispersion, of:
  • organic solvents such dispersion having not more than 10% volatile organic solvents plus amines, and
  • the present invention is made possible by a new method of synthesis of an epoxy ester urethane graft acrylic polymer.
  • the process involves the synthesis of a linear epoxy ester formed by reaction at 80-190°C of an oxirane terminated bisphenol A epoxy resin with aliphatic diacid-functional linear urethane esters and monoacids in approximately stoichiometric proportions so that all the oxirane groups and acid groups have reacted.
  • the reaction is done in a minimum amount of an organic solvent, preferably aromatic for ease of stripping, preferably using a small percentage of a tertiary araine as catalyst.
  • an acid functional acrylic is grafted onto the epoxy ester urethane using a peroxide or azo initiator. Grafting onto the epoxy ester urethane is believed to go via hydrogen abstraction of activated carbon-hydrogen bonds.
  • the acid functionality on the epoxy ester urethane is neutralized with a tertiary amine (50-200% neutralization), the polymer is dispersed in deionized water and the excess organic solvents are distilled off.
  • epoxy ester urethane acrylic dispersions then contain a minimum of organic solvents, so as to be able to formulate primer compositions, preferably with no more than 5% organic volatiles, including amines.
  • primer surfacers When combined with water soluble or dispersible crosslinkers, like hexamethoxymethylmelamine, pigments and extenders, primer surfacers can be formulated which show good corrosion resistance over bare steel, an excellent balance of hardness, flexibility, improved anti-chipping properties, good topcoat hold-out and appearance.
  • primer surfacers can be baked for 30 min at from 160°C to 200°C. still retaining their basic properties.
  • the primers can be applied by conventional or electrostatic spraying.
  • rheology control agents and flow agents can be used. Silica or clay pastes are quite successful for rheology control to prevent pinholing and sagging, and water soluble or dispersible linear or branched polyethylene glycols or polypropyleneglycols are efficient for flow properties.
  • the primer surfacers show excellent initial and wet adhesion over bare steel and cathodic electrodeposited primers. Adhesion and hold-out of conventional topcoats (polyester, alkyd. acrylic) is very good over broad temperature ranges. Hold-out is the resistance to interpenetration at the interface between the layers of primer surfacer and topcoat applied in organic solvents.
  • isocyanate hexamethylene diisocyanate
  • HDI isophorone diisocyanate IPDI hydrogenated bisphenyl methane HPMDI diisocyanate trimethyl hexane diisocyanate
  • TMHDI toluene diisocyanate TDI bisphenyl methane diisocyanate PMDI m or p xylylenediisocyanate m or p XDI
  • glycols ethylene glycol EG propylene glycol DG
  • succinic anhydride SA maleic anhydride MA phthalic anhydride- PA tetrahydro phthalic anhydride THPA hexahydro phthalic anhydride HHPA methyl hexahydro phthalic MHHPA anhydride
  • MAAM, BMAAM and MMAM acrylaraide and methacrylamide AM and MAM
  • Epon 1001 epoxy resin from Shell 1800 Epon 1001 epoxy resin from Shell 1800
  • IP Isopropanol
  • DBTDL dibutyltin dilaurate
  • Pluriol P 900 polypropylene oxide mol. weight 900 (reactive diluent) 2.26 BASF
  • Aerosil 200 fumed silica 0.87 Degussa Blanc Fixe barium sulfate .0.13 Sachtleben 30 Aluminum silicate 2.56 Titanium dioxide pigment 6.73 Carbon black 0.034 Iron oxide 0.145 Deionized water 3.941 Pigment to binder ratio (P/B) 74.3 / 100 Binder ratio: 76.5/15.3/8.2: Resin of Example 2/ Cymel 303/Pluriol P 900.
  • the above mixture is ground to a fineness smaller than 15 ⁇ m. Next there is added deionized water to obtain a package viscosity of 100 to 150 sec DIN cup 4 at 20°C.
  • PANEL PREPARATION The products of Examples 7-9 were reduced with deionized water to a spray viscosity of 20 seconds DIN cup 4 at 20°C.
  • the coating composition obtained was sprayed over a cataphoretic electrocoated panel at a thickness of 35 ⁇ m dry film thickness and cured at a temperature of 170°C for 25 minutes.
  • the obtained primer film was coated with different topcoats including alkyd/melamine//acrylic//melamine color coat - clear coat resulting in excellent adhesion gloss, flow and

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Paints Or Removers (AREA)
  • Macromonomer-Based Addition Polymer (AREA)

Abstract

Dispersion d'un acrylique greffé sur de l'uréthane d'ester époxyde dans de l'eau, avec un total n'excédant pas 5 % d'amines et de volatils organiques. Ces dispersions peuvent être utilisées dans des compositions d'apprêt pour des substrats métalliques ayant un minimum d'émissions de solvants organiques et qui peuvent être réticulés à des températures comprises entre 140 et 200° C, produisant un bon équilibre des propriétés de dureté, flexibilité, résistance à la corrosion et à l'humidité et anti-écaillage.
EP19870908023 1986-08-29 1987-08-28 Epoxy ester urethane graft acrylic water-based primer surfaces Withdrawn EP0280730A4 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US90156786A 1986-08-29 1986-08-29
US901567 1986-08-29
US93425286A 1986-11-24 1986-11-24
US934252 1986-11-24

Publications (2)

Publication Number Publication Date
EP0280730A1 true EP0280730A1 (fr) 1988-09-07
EP0280730A4 EP0280730A4 (en) 1990-09-12

Family

ID=27129296

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870908023 Withdrawn EP0280730A4 (en) 1986-08-29 1987-08-28 Epoxy ester urethane graft acrylic water-based primer surfaces

Country Status (3)

Country Link
EP (1) EP0280730A4 (fr)
JP (1) JPH01500676A (fr)
WO (1) WO1988001628A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107793539B (zh) * 2017-09-18 2021-06-15 苏州吉人高新材料股份有限公司 一种丙烯酸共聚环氧酯的水分散体及其制备方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2379588A1 (fr) * 1977-02-07 1978-09-01 Vianova Kunstharz Ag Procede de preparation d'emulsions cationiques autoreticulantes pour l'
US4564648A (en) * 1984-09-21 1986-01-14 E. I. Du Pont De Nemours And Company Epoxy graft acrylic water-based primer surfaces

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4302373A (en) * 1980-08-05 1981-11-24 E. I. Du Pont De Nemours And Company Water-borne coating composition made from modified epoxy resin, polymeric acid and tertiary amine
EP0060581B1 (fr) * 1981-03-13 1985-05-22 Akzo N.V. Procédé pour l'application d'un revêtement sur un substrat
US4665128A (en) * 1984-09-17 1987-05-12 E. I. Du Pont De Nemours And Company Flexible coating compositions

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2379588A1 (fr) * 1977-02-07 1978-09-01 Vianova Kunstharz Ag Procede de preparation d'emulsions cationiques autoreticulantes pour l'
US4564648A (en) * 1984-09-21 1986-01-14 E. I. Du Pont De Nemours And Company Epoxy graft acrylic water-based primer surfaces

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO8801628A1 *

Also Published As

Publication number Publication date
JPH01500676A (ja) 1989-03-09
WO1988001628A1 (fr) 1988-03-10
EP0280730A4 (en) 1990-09-12

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