WO2017026174A1 - ウレタン変性ポリイミド系樹脂溶液 - Google Patents
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- WO2017026174A1 WO2017026174A1 PCT/JP2016/068172 JP2016068172W WO2017026174A1 WO 2017026174 A1 WO2017026174 A1 WO 2017026174A1 JP 2016068172 W JP2016068172 W JP 2016068172W WO 2017026174 A1 WO2017026174 A1 WO 2017026174A1
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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
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/14—Polyamide-imides
-
- 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
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
-
- 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
- C08G18/34—Carboxylic acids; Esters thereof with monohydroxyl compounds
-
- 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
- C08G18/48—Polyethers
-
- 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
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
-
- 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
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
-
- 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
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/10—Printing inks based on artificial resins
- C09D11/102—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon 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
- C09D179/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen, or carbon only, not provided for in groups C09D161/00 - C09D177/00
- C09D179/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C09D179/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
-
- 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
- C08G2390/00—Containers
- C08G2390/40—Inner coatings for containers
Definitions
- the present invention retains the original heat resistance, mechanical properties, metal adhesion, and chemical resistance of the polyamide-imide resin, and is excellent in low-temperature drying property, moisture absorption stability and storage stability, and is soluble and flexible in non-amide solvents.
- the present invention relates to a novel urethane-modified polyimide resin that forms a transparent film and a method for producing the same.
- the present invention relates to a urethane-modified polyimide resin useful for an inner surface paint of an aerosol can excellent in heat resistance, chemical resistance and bending workability, a binder of screen printing ink for electronic materials, and the production method thereof.
- polyamide-imide resins are widely used as coating agents for various substrates because of their excellent heat resistance, chemical resistance, and solvent resistance. For example, they are used as varnishes for enameled wires and heat resistant paints.
- the conventional polyamide-imide resin is derived from its structure, and the coating film becomes hard, so it can be applied to applications that require flexibility and drying temperature is limited, such as paints and adhesives that require bending. It was difficult.
- the conventional polyamideimide resin is dissolved in a solvent having a high boiling point and high hygroscopicity such as N-methyl-2-pyrrolidone (NMP), N, N-dimethylacetamide (DMAc), ⁇ -butyrolactone (GBL). Therefore, special environmental maintenance is necessary, and in order to develop the above characteristics, it is necessary to heat at a high temperature of 250 ° C. or higher, which limits processing equipment and base materials, and increases costs. It was.
- NMP N-methyl-2-pyrrolidone
- DMAc N
- Patent Documents 1 and 2 studies on polysiloxane-modified polyimide resins (Patent Documents 1 and 2) and studies on dimer acid copolymerized polyamide-imide resins (Patent Document 3) have been proposed, but polysiloxanes are expensive, dimer acid Since the molecular weight is low, a large amount of copolymerization is required to obtain sufficient flexibility, and the inherent heat resistance of the polyimide resin is impaired.
- Patent Document 4 A method has been proposed (Patent Document 4) in which a coagulated polymer obtained by introducing a polymerized solution in a poor solvent such as water is dried and dissolved again in a low-boiling solvent such as alcohol or ether. There is a problem that it is expensive because of many manufacturing processes.
- Patent Document 5 there is an attempt to improve productivity and workability by polymerization in a cyclic ketone solvent as a non-amide low boiling point solvent (Patent Document 5), but in many cases, it is sufficient because it is polymerized in combination with NMP. In addition, even when NMP is not used, a polyamide-imide resin having a large amount of aromatic constituent components is obtained in order to maintain heat resistance. As a result, the solubility was unstable, the storage stability was poor, and a high molecular weight product could not be obtained.
- epoxy resin, phenol resin, and the like have been mainly used for the inner surface coating of metal cans which is one of the objects of the present invention. Due to the diversification of contents in recent years, a part of polyamideimide resin has been adopted due to demands for acid resistance, alkali resistance and durability to various organic solvents. However, conventional polyamide-imide resins have been limited in use because they cannot meet the requirements for bending workability, workability, environmental performance, and productivity in the can manufacturing process for the reasons described above.
- Japanese Patent Laid-Open No. 5-25452 Japanese Patent Laid-Open No. 7-304950 Japanese Patent Publication No. 3-54690 Japanese Patent No. 3446845 JP 2011-187262 A
- the present invention has developed a urethane-modified polyimide resin that eliminates the above-mentioned problems of the prior art and does not use a polar solvent having a high boiling point and a high hygroscopic property, and is excellent in low-temperature drying property, workability, and productivity, and It is an object of the present invention to provide a novel urethane-modified polyimide resin solution that is flexible and excellent in flexibility while maintaining the original heat resistance, adhesion, and chemical resistance of the polyimide resin.
- this invention consists of the following structures.
- an amideimide unit (i) composed of a trimellitic acid derivative and an aromatic diisocyanate component is represented by the general formula ( 1) selected from the group consisting of a urethane-modified polyimide resin (A) containing 10 to 70 mol% of a urethane unit (ii) composed of a compound represented by 1) and an aromatic diisocyanate component, cyclohexanone and cyclopentanone.
- m and n are integers of 1 or more and may be the same or different.
- an imide unit (iii) composed of a tetravalent polycarboxylic acid derivative and an aromatic diisocyanate component is contained in the urethane-modified polyimide resin (A).
- the tetravalent polycarboxylic acid derivative is alkylene glycol bisanhydro trimellitate.
- the tetravalent polycarboxylic acid derivative is ethylene glycol bisanhydro trimellitate.
- the urethane-modified polyimide resin (A) contains a urethane unit (iv) composed of a polyalkylene glycol component and an aromatic diisocyanate component.
- the polyalkylene glycol component is preferably polytetramethylene glycol and / or polypropylene glycol.
- the metal can inner surface coating composition containing at least one compound selected from the group consisting of a polyfunctional epoxy compound, an amino resin, a polyfunctional isocyanate compound, and a polyfunctional phenol resin in the urethane-modified polyamideimide resin solution or Composition for screen printing ink.
- a metal can inner surface paint or screen printing ink characterized in that inorganic and / or organic fine particles are blended with the above composition.
- organic solvents (B) selected from the group consisting of cyclohexanone and cyclopentanone 30 to 90 mol% of an amideimide unit (i) composed of a derivative and an aromatic diisocyanate, and 10 to 70 mol of a urethane unit (ii) composed of a compound represented by the general formula (1) and an aromatic diisocyanate % Of urethane-modified polyimide resin (A
- the urethane-modified polyimide resin solution of the present invention dissolves in a low-boiling non-amide solvent without using a high-boiling and highly hygroscopic polar solvent, and has excellent drying properties, workability, and productivity, and While maintaining the original heat resistance, adhesion and chemical resistance of polyimide resins, it is flexible and excellent in flexibility.
- the urethane-modified polyimide resin (A) used in the present invention has an amideimide unit (i) composed of a trimellitic acid derivative and an aromatic diisocyanate component (hereinafter also referred to as an amideimide unit (i)). It is a resin containing a urethane unit (ii) “hereinafter also referred to as a urethane unit (ii)” composed of the compound represented by (1) and an aromatic diisocyanate component.
- a urethane-modified polyamideimide resin is preferred.
- m and n are each an integer of 1 or more and may be the same or different.
- the upper limit of m and n is not particularly limited, but is industrially preferably 3 or less, more preferably 2 or less, and even more preferably 1.
- the content of the amide imide unit (i) needs to be 30 mol% or more, preferably 35 It is at least mol%, more preferably at least 40 mol%. Moreover, it is required that it is 90 mol% or less, Preferably it is 85 mol% or less, More preferably, it is 80 mol% or less. If the amidoimide unit (i) is less than 30 mol%, the solubility and the flexibility of the film are excellent, but the polymerization reaction is difficult to proceed, and the resulting urethane-modified polyimide resin has heat resistance, chemical resistance, and mechanical properties. May decrease.
- the amidoimide unit (i) exceeds 90 mol%, the solubility of the urethane-modified polyimide resin will decrease, so that the resin will precipitate during the polymerization, or the storage stability of the resulting resin solution will be poor, and over time There is a possibility that the resin is deposited. Moreover, the obtained polyimide resin may be brittle and lack flexibility.
- the content of the urethane unit (ii) needs to be 10 mol% or more, preferably 15 mol. % Or more, and more preferably 20 mol% or more. Moreover, it is required that it is 70 mol% or less, Preferably it is 65 mol% or less, More preferably, it is 60 mol% or less. If the urethane unit (ii) is less than 10 mol%, the solubility of the polyimide resin decreases, so that the resin precipitates during the polymerization, or the storage stability of the obtained resin solution is poor, and the resin precipitates over time. There is a fear.
- the obtained urethane-modified polyimide resin may be brittle and lack flexibility. If the urethane unit (ii) exceeds 70 mol%, the solubility in the solvent and the flexibility of the coating are improved, but the polymerization reaction is difficult to proceed, and the resulting urethane-modified polyimide resin has heat resistance and chemical resistance. , Mechanical properties may deteriorate.
- the solubility of the urethane-modified polyimide resin (A) in cyclohexanone and cyclopentanone is improved, and it can be copolymerized as a component imparting flexibility without impairing heat resistance.
- the greatest feature of the urethane-modified polyimide resin (A) is that it can be produced in one or more organic solvents selected from the group consisting of cyclohexanone and cyclopentanone having a low boiling point and low hygroscopicity.
- the manufactured urethane-modified polyimide resin (A) has excellent heat resistance and mechanical properties, and is excellent in chemical resistance while forming a flexible film, so it can be used as an internal paint for chemical cans and ink for screen printing. Preferably used.
- trimellitic acid derivative which comprises the amide imide unit (i) mentioned later, an aromatic diisocyanate component, and the general which comprises the urethane unit (ii)
- Polyalkylene glycol and aromatic diisocyanate component are dissolved in cyclohexanone and / or cyclopentanone alone or in a mixed solvent, and heated and stirred at 60 ° C to 150 ° C to polymerize while removing carbon dioxide generated by the reaction.
- a method is mentioned.
- each component may be added all at once from the beginning, or after synthesizing a polyamideimide prepolymer with a polycarboxylic acid component and a diisocyanate component, a glycol component may be added to introduce a urethane bond. Conversely, after the urethane prepolymer is formed, the polyamideimide may be formed.
- the side reaction of the polycarboxylic acid and glycol which are concerned when synthesizing the urethane-modified polyimide resin (A) of the present invention is suppressed, and the desired urethane-modified polyimide resin (A) is produced with good reproducibility.
- the molar ratio of the diisocyanate component in the synthesis of the urethane-modified polyimide resin (A) is preferably 0.8 to 1.1 with respect to the total of the acid component and glycol component that react with the diisocyanate component. This is because if the molar ratio of the diisocyanate component is less than 0.8, the formed film having a low ultimate molecular weight may become brittle.
- the solvent for the synthesis of the urethane-modified polyimide resin (A) it is necessary to use one or more selected from the group consisting of cyclohexanone and cyclopentanone. It is preferable that 90% by mass or more of at least one selected from the group consisting of cyclohexanone and cyclopentanone is contained in all solvents, more preferably 95% by mass or more, and still more preferably 99% by mass or more. Yes, particularly preferably 100% by mass.
- solvents can be mixed and used as long as the object of the present invention is not impaired.
- hydrocarbon solvents such as xylene and toluene
- ketone solvents such as acetone, methyl ethyl ketone, and methyl isobutyl ketone
- ether solvents such as tetrahydrofuran and dioxane
- alcohol solvents such as methanol, ethanol, isopropyl alcohol, and butyl alcohol.
- solvents may be added in a lump or divided at any time in the initial stage, midway of polymerization, and after completion of polymerization.
- the amount of solvent used is preferably 0.8 to 5.0 times (mass ratio) of the urethane-modified polyimide resin (A) to be produced, and more preferably 0.9 to 3.0 times. If it is less than 0.8 times, the viscosity at the time of synthesis is too high, and there is a tendency that the synthesis becomes difficult due to the inability to stir.
- the reaction in order to accelerate the reaction, triethylamine, lutidine, picoline, undecene, triethylenediamine (1,4-diazabicyclo [2.2.2] octane), DBU (1,8-diazabicyclo [5.4.0]) -7-undecene) and other amines, lithium methylate, sodium methylate, sodium ethylate, potassium butoxide, potassium fluoride, sodium fluoride, and other alkali metals, alkaline earth metal compounds, or titanium, cobalt, tin
- the reaction may be performed in the presence of a catalyst such as a metal such as zinc or aluminum, or a metalloid compound.
- the structural unit having a bisphenol skeleton is preferably 5 mol% or less, preferably 1 mol% or less, assuming that all components (all units) of the urethane-modified polyimide resin (A) are 100 mol%. More preferably, it is more preferably 0 mol%.
- the amidoimide unit (i) used in the present invention is a unit composed of a trimellitic acid derivative and an aromatic diisocyanate component.
- it is a polyamidoimide unit synthesized by a normal isocyanate method with a trimellitic acid derivative and an aromatic diisocyanate component as main constituent components.
- Trimellitic acid derivative is a derivative of trimellitic acid, and specific examples include trimellitic acid and trimellitic anhydride. Trimellitic anhydride is preferable.
- the aromatic diisocyanate component is not particularly limited. Specifically, for polyisocyanate, for example, diphenylmethane-2,4′-diisocyanate, 3,2′- or 3,3′- or 4,2′- or 4 , 3'- or 5,2'- or 5,3'- or 6,2'- or 6,3'-dimethyldiphenylmethane-2,4'-diisocyanate, 3,2'- or 3,3'- or 4,2'- or 4,3'- or 5,2'- or 5,3'- or 6,2'- or 6,3'-diethyldiphenylmethane-2,4'-diisocyanate, 3,2'- Or 3,3'- or 4,2'- or 4,3'- or 5,2'- or 5,3'- or 6,2'- or 6,3'-dimethoxydiphenylmethane-2,4'- Diisocyanate, diphenylmethane-4,4'-di Isocyanate, dipheny
- diphenylmethane-4,4′-diisocyanate, tolylene-2,4-diisocyanate, m-xylylene diisocyanate, 3,3 ′ or 2,2′-dimethylbiphenyl- 4,4′-diisocyanate is preferable, and diphenylmethane-4,4′-diisocyanate and tolylene-2,4-diisocyanate are more preferable. These can be used alone or in combination of two or more.
- aromatic diisocyanate in addition to aromatic diisocyanate, aliphatic diisocyanate and alicyclic diisocyanate can be used, but in order to achieve the object of the present invention, it is preferable to use aromatic diisocyanate mainly, and aromatic diisocyanate only. It is more preferable to use
- Examples of the aliphatic diisocyanate component include hexamethylene diisocyanate and lysine diisocyanate, and examples of the alicyclic diisocyanate component include isophorone diisocyanate, dicyclohexylmethane diisocyanate, and transcyclohexane 1,4-diisocyanate.
- the urethane unit (ii) used in the present invention is a unit composed of a compound represented by the general formula (1) and an aromatic diisocyanate component.
- the unit is a polyurethane unit synthesized by a normal urethane reaction using a compound represented by the general formula (1) and an aromatic diisocyanate component as main constituent components.
- the compound represented by the general formula (1) is preferably tricyclodecane dimethanol (hereinafter also referred to as TCD-DM).
- TCD-DM tricyclodecane dimethanol
- the solubility of the urethane-modified polyimide resin in cyclohexanone and cyclopentanone can be improved, and flexibility can be imparted without impairing heat resistance.
- tricyclo [5.2.1.0 (2,6)] decanedimethanol is more preferable from the viewpoint of availability.
- the aromatic diisocyanate component is preferably the same as the aromatic diisocyanate used in the amide imide unit (i).
- aromatic diisocyanates aliphatic diisocyanates and alicyclic diisocyanates can be used, but in order to achieve the object of the present invention, it is preferable to use aromatic diisocyanates mainly, and only aromatic diisocyanates are used. It is more preferable.
- Examples of the aliphatic diisocyanate component include hexamethylene diisocyanate and lysine diisocyanate, and examples of the alicyclic diisocyanate component include isophorone diisocyanate, dicyclohexylmethane diisocyanate, and transcyclohexane 1,4-diisocyanate.
- the urethane-modified polyimide resin (A) used in the present invention can further contain an imide unit (iii) as necessary.
- the imide unit (iii) is an imide unit composed of a tetravalent polycarboxylic acid derivative and an aromatic diisocyanate component.
- the tetravalent polycarboxylic acid derivative is not particularly limited, but is a tetravalent aromatic polycarboxylic acid, a tetravalent aliphatic polycarboxylic acid or a tetravalent alicyclic polycarboxylic acid, and an acid anhydride or acid thereof. And dianhydrides.
- aromatic polycarboxylic acid derivatives include pyromellitic dianhydride, ethylene glycol bisanhydro trimellitate, propylene glycol bis anhydro trimellitate, 1,4-butanediol bis anhydro trimellitate, hexamethylene Alkylene glycol bisanhydro trimellitates such as glycol bisanhydro trimellitate, polyethylene glycol bis anhydro trimellitate, polypropylene glycol bis anhydro trimellitate, 3,3 ′, 4,4′-benzophenone tetracarboxylic acid Dianhydride, 3,3 ′, 4,4′-biphenyltetracarboxylic dianhydride, 1,2,5,6-naphthalenetetracarboxylic dianhydride, 1,4,5,8-naphthalenetetracarboxylic acid Dianhydride, 2,3,5,6- Lysine tetracarboxylic dianhydride, 3,4,9,10-perylenetetracarboxylic
- aliphatic polycarboxylic acid derivatives or alicyclic polycarboxylic acid derivatives examples include butane-1,2,3,4-tetracarboxylic dianhydride, pentane-1,2,4,5-tetracarboxylic dianhydride , Cyclobutanetetracarboxylic dianhydride, hexahydropyromellitic dianhydride, cyclohex-1-ene-2,3,5,6-tetracarboxylic dianhydride, 3-ethylcyclohex-1-ene- 3- (1,2), 5,6-tetracarboxylic dianhydride, 1-methyl-3-ethylcyclohexane-3- (1,2), 5,6-tetracarboxylic dianhydride, 1-methyl -3-Ethylcyclohex-1-ene-3- (1,2), 5,6-tetracarboxylic dianhydride, 1-ethylcyclohexane-1- (1,2), 3,
- tetravalent polycarboxylic acid derivatives may be used alone or in combination of two or more.
- pyromellitic dianhydride, ethylene glycol bisanhydro trimellitate, 3, 3 ', 4, 4′-benzophenonetetracarboxylic dianhydride and 3,3 ′, 4,4′-biphenyltetracarboxylic dianhydride are preferred, and among these, ethylene glycol bisaanhydro trimellitate is more preferred.
- the aromatic diisocyanate component is preferably the same as the aromatic diisocyanate used in the amide imide unit (i).
- aromatic diisocyanates aliphatic diisocyanates and alicyclic diisocyanates can be used, but in order to achieve the object of the present invention, it is preferable to use aromatic diisocyanates mainly, and only aromatic diisocyanates are used. It is more preferable.
- Examples of the aliphatic diisocyanate component include hexamethylene diisocyanate and lysine diisocyanate, and examples of the alicyclic diisocyanate component include isophorone diisocyanate, dicyclohexylmethane diisocyanate, and transcyclohexane 1,4-diisocyanate.
- the content in the case of containing the imide unit (iii) is preferably 10 mol% or more when the total component (all units) of the urethane-modified polyimide resin (A) is 100 mol%, More preferably, it is 20 mol% or more, and it is preferable that it is 60 mol% or less, More preferably, it is 50 mol% or less, More preferably, it is 40 mol% or less. If it exceeds 60 mol%, the solvent solubility of the urethane-modified polyimide resin will decrease, so that the resin will precipitate during the polymerization, or the storage stability of the resulting urethane-modified polyimide resin solution will be poor, and the resin will change over time. May be deposited. Moreover, the obtained urethane-modified polyimide resin may be brittle and lack flexibility.
- the urethane-modified polyimide resin (A) used in the present invention can further contain a urethane unit (iv) as necessary.
- the urethane unit (iv) is a urethane unit composed of a polyalkylene glycol component and an aromatic diisocyanate component.
- the polyalkylene glycol component is not particularly limited, and examples thereof include polyethylene glycol, polypropylene glycol, polytetramethylene glycol, poly (neopentyl glycol / tetramethylene glycol) and the like.
- the polyalkylene glycol component is copolymerized as a flexible component that imparts flexibility, bending properties, solubility, and the like to the urethane-modified polyimide resin. By copolymerizing the polyalkylene glycol component, the elastic modulus of the resin is lowered, and the solubility in cyclohexanone or cyclopentanone solvent used as a polymerization solvent is improved, so that the storage stability of the varnish can be expected to increase.
- polytetramethylene glycol having a number average molecular weight of 500 or more and 3000 or less is preferably used, and more preferably 800 or more and 2000 or less. If the molecular weight is less than 500, the heat resistance, flexibility and bending properties may be deteriorated. If the molecular weight is more than 3000, the polymerization reaction hardly proceeds and the solubility may be deteriorated.
- the aromatic diisocyanate component is preferably the same as the aromatic diisocyanate used in the amide imide unit (i).
- aromatic diisocyanates aliphatic diisocyanates and alicyclic diisocyanates can be used, but in order to achieve the object of the present invention, it is preferable to use aromatic diisocyanates mainly, and only aromatic diisocyanates are used. It is more preferable.
- Examples of the aliphatic diisocyanate component include hexamethylene diisocyanate and lysine diisocyanate, and examples of the alicyclic diisocyanate component include isophorone diisocyanate, dicyclohexylmethane diisocyanate, and transcyclohexane 1,4-diisocyanate.
- the content in the case of containing the urethane unit (iv) is preferably 50 mol% or less, assuming that all components (all units) of the urethane-modified polyimide resin (A) are 100 mol%, More preferably, it is 40 mol% or less, More preferably, it is 30 mol% or less.
- Urethane unit (iv) contributes to improving solvent solubility and film flexibility, but if too much, the progress of polymerization slows down, and the resulting urethane-modified polyimide resin has heat resistance, chemical resistance and mechanical properties. May decrease.
- aliphatic, alicyclic, and aromatic polycarboxylic acids may be further copolymerized as necessary as long as the target performance is not impaired.
- Examples of the aliphatic dicarboxylic acid include succinic acid, glutaric acid, adipic acid, suberic acid, azelaic acid, sebacic acid, decanedioic acid, dodecanedioic acid, eicosanedioic acid, 2-methylsuccinic acid, 2-methyladipic acid, 3 -Methyladipic acid, 3-methylpentanedicarboxylic acid, 2-methyloctanedicarboxylic acid, 3,8-dimethyldecanedicarboxylic acid, 3,7-dimethyldecanedicarboxylic acid, 9,12-dimethyleicosane diacid, fumaric acid, Maleic acid, dimer acid, hydrogenated dimer acid and the like can be mentioned.
- Examples of the alicyclic dicarboxylic acid include 1,4-cyclohexanedicarboxylic acid, 1,3-cyclohexanedicarboxylic acid, 1,2-cyclohexanedicarboxylic acid, 4,4′-dicyclohexyldicarboxylic acid, and the like.
- Examples of the aromatic dicarboxylic acid include isophthalic acid, terephthalic acid, orthophthalic acid, naphthalenedicarboxylic acid, oxydibenzoic acid, and stilbene dicarboxylic acid. These dicarboxylic acids may be used alone or in combination of two or more. Considering heat resistance, adhesion, solubility, cost, etc., 1,4-cyclohexanedicarboxylic acid and isophthalic acid are preferable.
- aliphatic / aromatic polyester diols (trade name VYLON (registered trademark) 220 manufactured by Toyobo Co., Ltd.), aliphatic / aromatic polycarbonate diols (produced by Daicel Chemical Industries, Ltd., trade name PLACEL (registered trademark)) ) -CD220, manufactured by Kuraray Co., Ltd., trade name C-2015N, etc.), polycaprolactone diols (produced by Daicel Chemical Industries, Ltd., trade name PLACEL®-220, etc.), carboxy-modified acrylonitrile butadiene rubbers ( And polysiloxane derivatives such as polydimethylsiloxane diol, polymethylphenylsiloxane diol, and carboxy-modified polydimethylsiloxanes (U
- the urethane-modified polyimide resin is preferably composed of only 4 units of an amideimide unit (i), a urethane unit (ii), an imide unit (iii) or a urethane unit (iv).
- the elastic modulus is preferably 2500 MPa or less. When the elastic modulus exceeds 2500 MPa, the resin becomes brittle. For example, when applied to a metal can inner surface paint, the coating film may break during bending or drawing in the can making process.
- the logarithmic viscosity of the urethane-modified polyimide resin used in the present invention is preferably 0.1 dl / g or more and 2.0 dl / g or less, more preferably 0.2 dl / g or more and 1.5 dl / g or less. .
- the logarithmic viscosity is less than 0.1 dl / g, the heat resistance may be lowered or the coating film may be brittle.
- the glass transition temperature of the urethane-modified polyimide resin used in the present invention is preferably 80 ° C. or higher, more preferably 100 ° C. or higher.
- Organic solvent used in the present invention is at least one selected from the group consisting of cyclohexanone and cyclopentanone.
- polar solvents with high boiling point and high hygroscopicity such as NMP, DMAc or GBL, it is excellent in drying, workability and productivity, and heat resistance and dynamics inherent in polyimide resin. It is possible to obtain a resin that is flexible and excellent in flexibility while maintaining characteristics and chemical resistance.
- the urethane-modified polyimide resin solution of the present invention is a resin solution obtained by dissolving the urethane-modified polyimide resin (A) in an organic solvent (B).
- the urethane-modified polyimide resin of the present invention dissolves in non-amide solvents such as cyclohexanone and / or cyclopentanone, it is not necessary to add a high boiling point and highly hygroscopic polar solvent such as NMP, DMAc or GBL. . As a result, it is possible to obtain a urethane-modified polyimide resin solution that is excellent in drying property, workability, and productivity, and that is flexible and excellent in flexibility while maintaining the original heat resistance, mechanical properties, and chemical resistance of the polyimide resin.
- urethane-modified polyimide resin solution of the present invention When applying the urethane-modified polyimide resin solution of the present invention to a metal can inner surface paint or screen printing ink, a urethane-modified polyimide resin single solution may be used, but the heat resistance of the urethane-modified polyimide resin of the present invention.
- a curing agent can be added to further improve the mechanical properties, flexibility during bending, and chemical resistance.
- polyfunctional epoxy compounds As the curing agent, polyfunctional epoxy compounds, amino resins, and isocyanate compounds are preferably used.
- the polyfunctional epoxy compound is not particularly limited, but is bisphenol A type epoxy resin, hydrogenated bisphenol A type epoxy resin, bisphenol F type epoxy resin, phenol novolac type epoxy resin, amine type epoxy resin, alicyclic epoxy resin, bromine.
- Epoxy resins, etc. preferably JER (registered trademark) 828, JER1001, JER1004, etc. of Mitsubishi Chemical Corp. as bisphenol A type, JER152, JER154 and Dainippon Ink of Mitsubishi Chemical Corp. as phenol novolac type N-730A, N-740, N-770, N-775, etc. of the corporation are used.
- the amino resin is preferably a polyfunctional melamine compound, specifically, melamine resins such as trimethylol melamine and hexamethylol melamine and their alkoxy ether compounds, and benzoguanamine resins such as methylated benzoguanamine resin and butylated benzoguanamine resin. It is done.
- polyfunctional isocyanate compound a bifunctional diisocyanate compound used for the synthesis of the urethane-modified polyimide resin of the present invention, a trimethylolpropane 2,4-tolylene diisocyanate adduct or hexamethylene as a trifunctional isocyanate compound.
- examples thereof include cyclic trimers such as diisocyanate, diphenylmethane-4,4′-diisocyanate and isophorone diisocyanate, and block bodies in which these are protected with phenol or alcohol.
- the blending amount of these curing agents depends on the purpose, but is 1 to 50 parts by weight, preferably 3 to 30 parts by weight, based on 100 parts by weight of the solid content of the urethane-modified polyimide resin. If the blending amount of the curing agent is less than 1 part by weight, the effect of improving the heat resistance and chemical resistance is small, and if it exceeds 50 parts by weight, the coating film becomes brittle and the coating film may break during bending.
- the urethane-modified polyimide resin solution of the present invention may contain other resins as necessary, for example, polyamideimide resins, polyimide resins, polyamide resins, and polyester resins other than the urethane-modified polyimide resin of the present invention.
- An acrylic resin, a polyurethane resin, a polyethersulfone resin, a polyetherimide resin, and the like can be blended within a range that does not impair the object of the present invention.
- a colorant, an antistatic agent, and a flame retardant can be behind the urethane-modified polyimide resin solution of the present invention as necessary.
- the cyclohexanone and cyclopentanone used in the urethane-modified polyimide resin of the present invention have low hygroscopicity and have appropriate volatility, so that clogging of the screen plate is suppressed and an ink excellent in continuous printability is provided. Can do.
- thixotropy characteristics thixotropic properties
- organic or inorganic fine particles may be those generally used and are not particularly limited.
- examples of the inorganic fine particles include silica, alumina, titania, zirconia, silicon nitride, barium titanate, barium sulfate, barium carbonate, and carbon.
- organic fine particles examples include epoxy resin fine particles, polyimide resin fine particles, and benzoguanamine resin fine particles. These inorganic fine particles and organic fine particles may be used alone or in combination of two or more. Good.
- a leveling agent or the like for preventing the generation of pinholes can be appropriately blended as necessary.
- the urethane-modified polyimide resin of the present invention is a urethane-modified polyimide resin synthesized and dissolved in a low-boiling solvent of cyclohexanone or cyclopentanone, which cannot be achieved by the prior art by making a specific configuration. I was able to complete it.
- a novel urethane-modified polyimide resin excellent in drying property, workability, productivity, flexible and flexible while maintaining the original heat resistance, mechanical properties and chemical resistance of the polyamide-imide resin, and this This makes it possible to provide screen printing inks useful for paints on the inner surface of metal cans and circuit boards.
- a modified polyimide resin solution (PAI-E) was synthesized.
- the urethane-modified polyimide resin solution of the present invention is dissolved in cyclohexane and / or cyclopentanone as an organic solvent, it is not necessary to use a polar solvent having a high boiling point and high hygroscopicity such as NMP, DMAc or GBL. Therefore, a urethane-modified polyimide resin solution that is excellent in low-temperature drying property, workability, and productivity, and that is flexible and excellent in flexibility while maintaining the original heat resistance, mechanical properties, and chemical resistance of the polyimide resin is provided. be able to.
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Abstract
Description
本発明に用いるウレタン変性ポリイミド系樹脂(A)は、トリメリット酸誘導体と芳香族ジイソシアネート成分から構成されるアミドイミドユニット(i)「以下、アミドイミドユニット(i)ともいう。」と、一般式(1)で表される化合物と芳香族ジイソシアネート成分から構成されるウレタンユニット(ii)「以下、ウレタンユニット(ii)ともいう。」を含有する樹脂である。好ましくはウレタン変性ポリアミドイミド樹脂である。
本発明に用いるアミドイミドユニット(i)は、トリメリット酸誘導体と芳香族ジイソシアネート成分から構成されるユニットである。好ましくはトリメリット酸誘導体と芳香族ジイソシアネート成分を主たる構成成分として通常のイソシアネート法で合成されるポリアミドイミドのユニットである。
本発明に用いるウレタンユニット(ii)は、一般式(1)で表される化合物と芳香族ジイソシアネート成分から構成されるユニットである。好ましくは一般式(1)で表される化合物と芳香族ジイソシアネート成分を主たる構成成分として通常のウレタン反応で合成されるポリウレタンのユニットである。
本発明に用いるウレタン変性ポリイミド系樹脂(A)は、必要に応じて、さらにイミドユニット(iii)を含有することができる。イミドユニット(iii)は、4価のポリカルボン酸誘導体と芳香族ジイソシアネート成分から構成されるイミドのユニットである。
本発明に用いるウレタン変性ポリイミド系樹脂(A)は、必要に応じて、さらにウレタンユニット(iv)を含有することができる。ウレタンユニット(iv)は、ポリアルキレングリコール成分と芳香族ジイソシアネート成分から構成されるウレタンのユニットである。
なお、本発明で用いられるウレタン変性ポリイミド系樹脂においては、目的とする性能を損なわない範囲で必要に応じ、さらに脂肪族、脂環族、芳香族ポリカルボン酸類を共重合しても構わない。脂肪族ジカルボン酸としては、例えばコハク酸、グルタル酸、アジピン酸、スベリン酸、アゼライン酸、セバシン酸、デカン二酸、ドデカン二酸、エイコサン二酸、2-メチルコハク酸、2-メチルアジピン酸、3-メチルアジピン酸、3-メチルペンタンジカルボン酸、2-メチルオクタンジカルボン酸、3,8-ジメチルデカンジカルボン酸、3,7-ジメチルデカンジカルボン酸、9,12-ジメチルエイコサン二酸、フマル酸、マレイン酸、ダイマー酸、水添ダイマー酸等が挙げられる。脂環族ジカルボン酸としては、例えば1,4-シクロヘキサンジカルボン酸、1,3-シクロヘキサンジカルボン酸、1,2-シクロヘキサンジカルボン酸、4,4’-ジシクロヘキシルジカルボン酸等が挙げられる。芳香族ジカルボン酸としては、例えばイソフタル酸、テレフタル酸、オルソフタル酸、ナフタレンジカルボン酸、オキシジ安息香酸、スチルベンジカルボン酸等が挙げられる。これらのジカルボン酸類は単独でも二種以上を組み合わせて用いても構わない。耐熱性、密着性、溶解性、コスト面などを考慮すれば、1,4-シクロヘキサンジカルボン酸、イソフタル酸が好ましい。
本発明で用いる有機溶剤は、シクロヘキサノンおよびシクロペンタノンからなる群より選ばれた1種以上である。一般的に用いられる、NMP、DMAcまたはGBLなどの高沸点で吸湿性の高い極性溶剤を全く使用しないことで、乾燥性、作業性、生産性に優れ、かつポリイミド系樹脂本来の耐熱性や力学特性、耐薬品性を保持しつつ柔軟で屈曲性に優れる樹脂を得ることができる。
本発明のウレタン変性ポリイミド系樹脂溶液は、前記ウレタン変性ポリイミド系樹脂(A)を有機溶剤(B)に溶解した樹脂溶液である。
多官能エポキシ化合物としては、特に限定されないが、ビスフェノールA型エポキシ樹脂、水添ビスフェノールA型エポキシ樹脂、ビスフェノールF型エポキシ樹脂、フェノールノボラック型エポキシ樹脂、アミン型エポキシ樹脂、脂環族エポキシ樹脂、臭素化エポキシ樹脂などが挙げられ、好ましくは、ビスフェノールA型として三菱化学(株)のJER(登録商標)828やJER1001、JER1004等やフェノールノボラック型として三菱化学(株)のJER152、JER154及び大日本インキ株式会社のN-730A,N-740,N-770,N-775などが用いられる。
本発明のウレタン変性ポリイミド系樹脂に用いられるシクロヘキサノンやシクロペンタノンは吸湿性が低いうえに適度な揮発性を有するためにスクリーン版の目詰まりを抑え、連続印刷性に優れたインキを提供することができる。
用いられる微粒子は通常一般に用いられているもので良く特に制限はない。具体的には、無機微粒子としてはシリカ、アルミナ、チタニア、ジルコニア、窒化ケイ素、チタン酸バリウム、硫酸バリウム、炭酸バリウム、カーボンなどが挙げられる。
尚、実施例に記載される測定値は以下の方法で測定されたものである。
ウレタン変性ポリイミド系樹脂を、ポリマー濃度が0.5g/dlとなるようにN-メチル-2-ピロリドンに溶解し、30℃にて、ウベローデ型粘度管により溶液粘度を測定した。対数粘度は以下の式をもって定義した。
(対数粘度)=(lnηrel)/C
ln:自然対数
ηrel:溶媒落下時間測定による純溶媒に対する溶液の粘度比(-)
C:溶液の濃度(g/dl)
(配合)
ウレタン変性ポリイミド系樹脂溶液(30重量%):100部
B890(三井化学社製ブロックイソシアネート):10部
BYK(登録商標)358(ビックケミー社レベリング剤):1部
アエロジル(登録商標)#300(日本アエロジル社製 親水性シリカ粒子):3部
フローレンAC326F(共栄社化学製 消泡剤):1.5部
(混練)
上記溶液をデイスパーで撹拌、混合した後、3本ロールミルで2回混練した。この溶液に25℃下における溶液粘度が200dPa・sとなるようにシクロヘキサノンを加えて、目的とする塗料を得た。
<密着性>
上記塗料を大佑基材社製の0.3mm厚みのアルミニウム板に乾燥膜厚が約5μmとなるように塗布、200℃×30分乾燥し、塗布サンプルを得た。その後、塗料の塗膜面に、JIS-K5600-5-6:1999に準じて、1mmの碁盤目を100ヶ所作り、セロテープによる剥離試験をおこない碁盤目の剥離状態を観察した。
(判定)○:100/100で剥離なし
△:70~99/100
×:0~69/100
前記塗布サンプルの塗布面を外側にして折り曲げる際、折り曲げ部に塗布に用いたアルミニウム板を挟み、折り曲げ部に亀裂が入るときの挟んだ板の枚数によって評価した。
(判定)○:0枚
△:1~2枚
×:3枚以上
前記塗布サンプルの非塗布面をセロテープで保護した試料を5%硫酸溶液に浸漬し、室温で1週間静置した後の塗膜の状態を目視で観察した。
(判定)○ :変化なし
△ :ブリスターが見られる
× :塗膜が剥離
耐酸性の評価に用いた試料を5%水酸化ナトリウム溶液に浸漬し、室温で1週間静置した後の塗膜の状態を目視で観察した
(判定)○ :変化なし
△ :ブリスターが見られる
× :塗膜が剥離
(配合)
ウレタン変性ポリイミド系樹脂溶液(30重量%):100部
TETRAD(登録商標)-X(三菱化学社製エポキシ化合物):4部
BYK358(ビックケミー社レベリング剤):1部
アエロジル#300(日本アエロジル社製 親水性シリカ粒子):3部
フローレンAC326F(共栄社化学製 消泡剤):1.5部
(混練)
上記インクをデイスパーで撹拌、混合した後、3本ロールミルで2回混練した。この溶液に25℃下における溶液粘度が200dPa・sとなるようにシクロヘキサノンを加えて、目的とするインクを得た。
<揺変度(チキソ比)>
ブルックフィールドBH型回転粘度計を用いて、次の手順で測定した。広口型遮光瓶(100ml)に上記コーティング液の調製で得られたコーティング液を入れ、恒温水槽を用いて液温を25℃±0.5℃に調整した。ついで、ガラス棒を用いて12~15秒かけて40回撹拌した後、所定のローターを設置して、5分静置した後、20rpmで3分回転させたときの目盛りを読み取った。粘度は、この目盛りに換算表の係数をかけて算出した。同じく25℃、2rpmで測定した粘度の値から次式で計算した。
揺変度=粘度(2rpm)/粘度(20rpm)
上記インクの調製で得られたコーティング液を新日鐵化学(株)社製エスパネックスMの銅箔面に、乾燥膜厚が15μmとなるようにそれぞれスクリーン印刷で塗布し、150℃×30分乾燥、熱処理を行い、印刷サンプルを得た。JIS-K5600-5-6:1999に準じて、インクの塗膜面に1mmの碁盤目を100ヶ所作り、セロテープによる剥離試験をおこない碁盤目の剥離状態を観察した。厚さ25μmのポリイミドフィルムを基材とした場合についても同様におこなった。
(判定)○:100/100で剥離なし
△:70~99/100
×:0~69/100
上記インクの調製で得られたインクを新日鐵化学(株)社製エスパネックスMの銅箔面に、乾燥膜厚が15μmとなるようにそれぞれスクリーン印刷でベタを印刷、その後150℃×3時間乾燥熱処理を行い、印刷サンプルを得た。この印刷サンプルの屈曲性評価をJIS-K5400:1990に準じて評価をおこなった。心棒の直径は2mmとしクラック発生の有無を確認した。
(判定)○:クラック発生無し
×:クラック発生有り
上記インクの調製で得られたインクを用い、下記記載の方法で500枚連続スクリーン印刷した際の、インキからの樹脂析出、粘度上昇によるスクリーン版の目詰まりを観察した。
[印刷条件]
新日鐵化学(株)社製エスパネックスMの銅箔面に、乾燥膜厚が15μmとなるように、SUS製スクリーン版((株)ムラカミ製150メッシュ、乳剤30μm)を用い、線幅1cm、線の長さ5cm、線間3cmのパターンの印刷を500枚連続で実施した。
(判定)○:スクリーン版の目詰まりが抑えられ、連続印刷性に優れる。
×:スクリーン版の目詰まりが抑えられず、連続印刷性に劣る。
攪拌機、冷却管、窒素ガス導入管及び温度計を備えた3リットル4ツ口フラスコにトリメリット酸無水物(TMA)0.35モル、エチレングリコールビスアンヒドロトリメリテート(TMEG 新日本理化製TMEG200)0.35モル、トリシクロデカンジメタノール(TCD-DM):0.3モル、ジフェニルメタン-4,4’-ジイソシアネート(MDI):1モルと触媒として1,8-ジアザビシクロ〔5,4,0〕-7-ウンデセン(DBU):0.01モルを固形分濃度が50%となるようにシクロヘキサノンと共に仕込み、攪拌しながら80℃に昇温して約1時間反応させ、発熱が収まった後120℃に昇温してさらに5時間反応させた。次いで、冷却しながら固形分濃度が30%となるようにシクロヘキサノンで希釈して、ウレタン変性ポリイミド系樹脂溶液(PAI-A)を合成した。
合成例1と同様の装置を用い、合成例1で用いたシクロヘキサノンをシクロペンタノンに変えた以外は合成例1と同じ条件でウレタン変性ポリイミド系樹脂溶液(PAI-B)を合成した。
合成例1と同様の装置を用い、原料の仕込みをTMA:0.35モル、TMEG:0.3モル、TCD-DM:0.3モル、ポリテトラメチレングリコール(三洋化成工業社製サンニックス(登録商標)PTMG#850 分子量850):0.05モル、ジフェニルメタン-4,4’-ジイソシアネート(MDI):1モル、DBU:0.01モルを固形分濃度が50%となるようにシクロヘキサノンと共に仕込み、合成例1と同じ条件でウレタン変性ポリイミド系樹脂溶液(PAI-C)を合成した。
合成例1と同様の装置を用い、原料としてTMA:0.35モル、TMEG:0.35モル、TCD-DM:0.25モル、ポリプロピレングリコール(三洋化成工業社製サンニックス(登録商標)PPG#1000 分子量1000):0.05モル、MDI:1モル、DBU:0.01モルを固形分濃度が50%となるようにシクロヘキサノンとともに仕込み、合成例1と同じ条件でウレタン変性ポリイミド系樹脂溶液(PAI-D)を合成した。
合成例1と同じような装置を用いて、TCD-DM:0.4モル、MDI:0.8モルを固形分濃度が50%となるようにシクロヘキサノンと共に仕込み、80℃に昇温して1時間反応させた後、60℃以下に冷却し、TMA:0.3モル、TMEG:0.3モル、MDI:0.2モル、DBU:0.01モルを固形分濃度が50%となるようにシクロヘキサノンと共に仕込んだ。この溶液を再度80℃に昇温して約1時間反応させ、120℃に昇温して5時間反応させた後、冷却しながら固形分濃度が30%となるようにシクロヘキサノンで希釈してウレタン変性ポリイミド系樹脂溶液(PAI-E)を合成した。
合成例1と同じような装置を用い、TMA:1モル、MDI:1モルを固形分濃度が30%となるようにシクロヘキサノン/NMP=4/1の混合溶剤と共に仕込み、合成例1と同じ条件で合成し。ウレタン変性ポリイミド系樹脂溶液(PAI-F)を製造した。しかし、重合の進行に伴い溶液は不透明に濁り、分子量が十分に上がらなかった。
合成例1と同じような装置を用い、原料としてTMA:0.05モル、TMEG:0.05モル、TCD-DM:0.9モル、MDI:1モル、DBU:0.01モルを固形分濃度が50%となるようにシクロヘキサノンと共に仕込み、合成例1と同じ条件でウレタン基濃度が特許請求項範囲外であるウレタン変性ポリイミド系樹脂溶液(PAI-G)を合成した。
攪拌機、冷却管、窒素ガス導入管及び温度計を備えた3リットル4ツ口フラスコにトリメリット酸無水物(TMA)0.6モル、トリシクロデカンジメタノール(TCD-DM):0.4モル、ジフェニルメタン-4,4’-ジイソシアネート(MDI):1モルと触媒として1,8-ジアザビシクロ〔5,4,0〕-7-ウンデセン(DBU):0.01モルを固形分濃度が50%となるようにシクロヘキサノンと共に仕込み、攪拌しながら80℃に昇温して約1時間反応させ、発熱が収まった後120℃に昇温してさらに5時間反応させた。次いで、冷却しながら固形分濃度が30%となるようにシクロヘキサノンで希釈して、ウレタン変性ポリイミド系樹脂溶液(PAI-H)を合成した。
攪拌機、冷却管、窒素ガス導入管及び温度計を備えた3リットル4ツ口フラスコにトリメリット酸無水物(TMA)0.35モル、エチレングリコールビスアンヒドロトリメリテート(TMEG 新日本理化製TMEG200)0.05モル、トリシクロデカンジメタノール(TCD-DM):0.6モル、ジフェニルメタン-4,4’-ジイソシアネート(MDI):1モルと触媒として1,8-ジアザビシクロ〔5,4,0〕-7-ウンデセン(DBU):0.01モルを固形分濃度が50%となるようにシクロヘキサノンと共に仕込み、攪拌しながら80℃に昇温して約1時間反応させ、発熱が収まった後120℃に昇温してさらに5時間反応させた。次いで、冷却しながら固形分濃度が30%となるようにシクロヘキサノンで希釈して、ウレタン変性ポリイミド系樹脂溶液(PAI-I)を合成した。
Claims (11)
- さらに、4価のポリカルボン酸誘導体と芳香族ジイソシアネート成分から構成されるイミドユニット(iii)をウレタン変性ポリイミド系樹脂(A)に含有する請求項1に記載のウレタン変性ポリイミド系樹脂溶液。
- 4価のポリカルボン酸誘導体がアルキレングリコールビスアンヒドロトリメリテートであることを特徴とする請求項2に記載のウレタン変性ポリイミド系樹脂溶液。
- 4価のポリカルボン酸誘導体がエチレングリコールビスアンヒドロトリメリテートであることを特徴とする請求項2に記載のウレタン変性ポリイミド系樹脂溶液。
- さらに、ポリアルキレングリコール成分と芳香族ジイソシアネート成分から構成されるウレタンユニット(iv)をウレタン変性ポリイミド系樹脂(A)に含有する請求項1~4のいずれかに記載のウレタン変性ポリイミド系樹脂溶液。
- ポリアルキレングリコール成分がポリテトラメチレングリコールおよび/またはポリプロピレングリコールである請求項5に記載のウレタン変性ポリアミドイミド樹脂溶液。
- 請求項1~6のいずれかに記載のウレタン変性ポリアミドイミド樹脂溶液に、多官能エポキシ化合物、アミノ樹脂、多官能イソシアネート化合物及び多官能フェノール樹脂からなる群より選ばれた少なくとも1種の化合物を含有する金属缶内面塗料用組成物。
- 請求項7に記載の金属缶内面塗料用組成物に、無機及び/又は有機の微粒子を配合したことを特徴とする金属缶内面用塗料。
- 請求項1~6のいずれかに記載のウレタン変性ポリアミドイミド樹脂溶液に、多官能エポキシ化合物、アミノ樹脂、多官能イソシアネート化合物及び多官能フェノール樹脂からなる群より選ばれた少なくとも1種の化合物を含有するスクリーン印刷インキ用組成物。
- 請求項9に記載のスクリーン印刷インキ用組成物に、無機及び/又は有機の微粒子を配合したことを特徴とするスクリーン印刷用インキ。
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