WO2016104875A1 - 고탄성 폴리에스터 변성 우레탄 수지 및 이를 포함하는 클리어코트 조성물 - Google Patents
고탄성 폴리에스터 변성 우레탄 수지 및 이를 포함하는 클리어코트 조성물 Download PDFInfo
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- 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
- C08G18/4205—Polycondensates having carboxylic or carbonic ester groups in the main chain containing cyclic groups
- C08G18/423—Polycondensates having carboxylic or carbonic ester groups in the main chain containing cyclic groups containing cycloaliphatic groups
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/83—Chemically modified polymers
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
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- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
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- 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
- C08G18/4202—Two or more polyesters of different physical or chemical nature
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- 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
- C08G18/4236—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups
- C08G18/4238—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups derived from dicarboxylic acids and dialcohols
- C08G18/4241—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups derived from dicarboxylic acids and dialcohols from dicarboxylic acids and dialcohols in combination with polycarboxylic acids and/or polyhydroxy compounds which are at least trifunctional
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- 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
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- 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
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- 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
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- 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
- C08G18/73—Polyisocyanates or polyisothiocyanates acyclic
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- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/68—Polyesters containing atoms other than carbon, hydrogen and oxygen
- C08G63/685—Polyesters containing atoms other than carbon, hydrogen and oxygen containing nitrogen
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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
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/91—Polymers modified by chemical after-treatment
- C08G63/914—Polymers modified by chemical after-treatment derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/916—Dicarboxylic acids and dihydroxy compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
- C08L75/06—Polyurethanes from polyesters
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- 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
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- 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
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/44—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for electrophoretic applications
- C09D5/4419—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for electrophoretic applications with polymers obtained otherwise than by polymerisation reactions only involving carbon-to-carbon unsaturated bonds
- C09D5/4465—Polyurethanes
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- 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
- C09D7/65—Additives macromolecular
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S528/00—Synthetic resins or natural rubbers -- part of the class 520 series
- Y10S528/906—Fiber or elastomer prepared from an isocyanate reactant
Definitions
- the present invention relates to a high elastic polyester modified urethane resin and a clearcoat composition comprising the same, and more particularly, to a high elastic polyester modified urethane resin having improved chipping resistance by introducing an aliphatic isocyanate and a caprolactone polyol into a polyester resin.
- polyester-modified urethane resin as the main resin, a separate intermediate coating layer forming process can be omitted, and excellent mechanical properties such as better coating appearance, scratch resistance, cold resistance chipping, impact resistance, etc. are compared with conventional coating methods. It relates to a clearcoat composition that can be made.
- primer compositions for automotive coatings using epoxy modified polyester resins and block isocyanate curing agents e.g. EP 0152413
- waterborne coating compositions for automotive intermediates using polyurethane dispersion resins and methylated melamine curing agents e.g. , Korean Patent No. 0665882
- a separate process for forming the intermediate layer is required, thereby reducing the efficiency of the process.
- the present invention is to solve the problems of the prior art as described above, by introducing an aliphatic isocyanate and a caprolactone polyol to the polyester resin improved high elastic polyester modified urethane resin and the polyester-modified urethane resin
- a separate intermediate coating layer forming process can be omitted, and compared to the existing coating method provides a clear coat composition that can secure excellent mechanical properties such as good coating appearance and scratch resistance, cold resistance chipping, impact resistance, etc. It is technical problem to do.
- this invention is a resin structural unit, Comprising: polyester-derived unit obtained from (1) aliphatic polyhydric alcohol and aliphatic or alicyclic polyhydric acid, (2) caprolactone polyol derived unit, and (3) aliphatic di
- polyester-derived unit obtained from (1) aliphatic polyhydric alcohol and aliphatic or alicyclic polyhydric acid
- caprolactone polyol derived unit (2) caprolactone polyol derived unit
- aliphatic di Provided is a polyester-modified urethane resin containing an isocyanate-derived unit.
- the polyester-modified urethane resin of the present invention based on 100 parts by weight of the total composition, 5 to 30 parts by weight of the polyester-modified urethane resin of the present invention; 20 to 60 parts by weight of the silane-modified acrylic polyol resin; 5-30 parts by weight of curing agent; 0.5 to 3 parts by weight of a curing catalyst; And it provides a clear coat composition comprising 10 to 25 parts by weight of a solvent.
- a molded article comprising at least one coating layer formed from the clearcoat composition.
- the novel polyester modified urethane resin according to the present invention has high elasticity and chipping resistance by introducing aliphatic isocyanate and caprolactone polyol into the polyester resin, and the clearcoat composition to which the same is applied has good coating appearance, scratch resistance, and cold resistance. Since excellent mechanical properties such as impact resistance can be ensured, the intermediate coating layer forming step can be omitted.
- the polyester-modified urethane resin of the present invention is a resin-derived unit comprising (1) a polyester-derived unit obtained from an aliphatic polyhydric alcohol and an aliphatic or alicyclic polyhydric acid, (2) a caprolactone polyol-derived unit, and (3) an aliphatic diisocyanate. Contains units.
- C3-C12 (more specifically, C4-C10) aliphatic compound which has 2 or more (for example, 2-4) hydroxyl groups (-OH) is used individually or in mixture of 2 or more types And may be selected from, for example, propanediol, butanediol, neopentyl glycol, trimethylol propane, and combinations thereof, but is not limited thereto.
- aliphatic or alicyclic polycarboxylic acid C3-C12 (more specifically, C4-C10) aliphatic polycarboxylic acid or C5 which has 2 or more (for example, 2-4) carboxylic acid groups (-COOH)
- Alicyclic polyhydric acids having from 12 to 12 may be used alone or in combination of two or more, and may be selected from, for example, hexanedicarboxylic acid, cyclohexyldicarboxylic acid, and combinations thereof.
- the present invention is not limited thereto.
- the caprolactone polyol is a linear polyester diol derived from caprolactone.
- the caprolactone polyol may have a weight average molecular weight (Mw) of 500 to 1,500. When the weight average molecular weight exceeds 1500, workability and coating film hardness due to high viscosity may be reduced, and when less than 500, mechanical and chemical properties may be reduced.
- the polyester-modified urethane resin of the present invention comprises the steps of: (a) reacting an aliphatic polyhydric alcohol with an aliphatic or alicyclic polyhydric acid to synthesize a polyester intermediate; And (b) reacting the synthesized polyester intermediate, caprolactone polyol and aliphatic diisocyanate to synthesize a polyester-modified urethane resin.
- the amount of each component is used based on the total weight of the reactants in step (a) 40 to 60% by weight of an aliphatic polyhydric alcohol, 40 to 60% by weight of an aliphatic (or alicyclic) polyacid, but is not limited thereto.
- the amount of each component is 30 to 60% by weight of the aliphatic polyhydric alcohol, aliphatic, based on the total weight of the reactants in the step (a). It may be 5 to 40% by weight of polyacid and 30 to 60% by weight of alicyclic polyacid, but is not limited thereto.
- the amount of each component used in the step (b) is 40 to 70% by weight of the polyester intermediate, caprolactone polyol 20 based on the total weight of the reactants in the step (b) 40 wt% and aliphatic diisocyanate 5-40 wt%, but is not limited thereto.
- the polyester-modified urethane resin may be used as the main resin of the clearcoat composition of the present invention as described below. Since the aliphatic isocyanate applied to the main resin introduces urethane groups into the main chain and the caprolactone polyol introduces flexible elastic groups into the main chain, the prepared high elastic polyester modified urethane resin is used as the main resin of the clearcoat composition. When used, chipping resistance can be improved.
- the polyester-modified urethane resin has a solid content of 50 to 70% based on the total weight of the resin, and a hydroxyl value of 30 to 200 mgKOH / g (more specifically, 50 to 100 mgKOH / g) and 1 to 50 mgKOH / g (more Specifically, it may have an acid value of 2 to 20 mgKOH / g). If the hydroxyl value is less than 30mgKOH / g may increase the loss elastic modulus to retire the coating film, if it exceeds 200mgKOH / g may increase the hardness of the coating film while the elastic modulus is lowered may cause problems of chipping resistance.
- the polyester-modified urethane resin may have a weight average molecular weight (Mw) of 500 to 5,000.
- the polyester-modified urethane resin based on 100 parts by weight of the total composition, 5 to 30 parts by weight of the polyester-modified urethane resin; 20 to 60 parts by weight of the silane-modified acrylic polyol resin; 5-30 parts by weight of curing agent; 0.5 to 3 parts by weight of a curing catalyst; And it provides a clear coat composition comprising 10 to 25 parts by weight of a solvent.
- the polyester-modified urethane resin may be included in 5 to 30 parts by weight, preferably 10 to 28 parts by weight, more preferably 15 to 25 parts by weight. If less than 5 parts by weight, the elasticity and flexibility is less given to the final coating film may lower the physical properties such as scratch resistance, impact resistance, chipping resistance, etc. If it exceeds 30 parts by weight, the water resistance and hardness of the final coating film may be lowered have.
- the silane-modified acrylic polyol resin may be included in 20 to 60 parts by weight, preferably 30 to 55 parts by weight, more preferably 40 to 50 parts by weight. If it is less than 20 parts by weight, physical properties such as hardness and water resistance and weather resistance of the final coating film may be a problem, and when it exceeds 60 parts by weight, physical properties such as impact resistance and chipping resistance may be lowered.
- the silane-modified acrylic polyol resin has a solid content of 50 to 80% based on the total weight of the resin, a weight average molecular weight (Mw) of 5,000 to 10,000, a hydroxyl value of 20 to 120 mgKOH / g, more specifically It may be 50-100 mgKOH / g.
- the glass transition temperature may be 10 ⁇ 80 °C, more specifically 10 ⁇ 70 °C.
- the weight average molecular weight (Mw) is closely related to workability and mechanical and chemical properties, and when it is out of the above range, workability and mechanical and chemical properties may be degraded.
- the hydroxyl value is closely related to the crosslinking density of the coating film. This affects weather resistance and hardness, and weather resistance and hardness may be lowered outside the above range.
- the curing agent may be included in 5 to 30 parts by weight, preferably 10 to 25 parts by weight, more preferably 15 to 20 parts by weight.
- the coating film may recede, thereby decreasing hardness and water resistance.
- the coating film may be hardened to reduce impact resistance and chipping resistance.
- the curing agent may be selected from hexamethylolmelamine, hexamethoxymethylmelamine, hexabutoxymethylmelamine, hexamethoxybutoxymethylmelamine, iminomethoxymethylmelamine and combinations thereof.
- the curing catalyst may be included in 0.5 to 3 parts by weight, preferably 1 to 2.5 parts by weight, more preferably 1.3 to 2 parts by weight. If the content is less than 0.5 parts by weight, the crosslinking density may be lowered due to the lowering of the curing rate, and thus the hardness, water resistance, solvent resistance, etc. may be lowered. If the content is greater than 3 parts by weight, the coating film may be hardened due to the increase of the curing rate. Problems with poor recoating may occur.
- the curing catalyst may be selected from dodecylbenzenesulfonic acid, sulfonic acid, dinonylnaphthalene disulfonic acid, dinonylnaphthalenesulfonic acid, paratoluenesulfonic acid, and combinations thereof.
- the clearcoat composition of the present invention may further include an additive selected from the group consisting of a leveling agent, a light stabilizer, a storage stability improving agent, and a combination thereof.
- a molded article comprising at least one coating layer formed from the clearcoat composition.
- the molded article may be a metal or a non-metallic material, for example, an automobile part.
- the reaction was carried out under a xylene reflux reaction, cooled to an acid value of 10 or less, and diluted with 24 g of xylene. .
- 20 g of caprolactone polyol, 5 g of hexamethylene diisocyanate, and 15 g of propylene glycol monomethyl ether acetate were added and reacted at 100 ° C. at 80 ° C. or lower.
- the reaction was terminated when the content of isocyanate became '0' as the reaction proceeded.
- the synthesized polyester-modified urethane resin had an acid value of 5 mgKOH / g and a hydroxyl value of 77 mgKOH / g.
- the reaction was carried out under a xylene reflux reaction, cooled to an acid value of 40 or less, and diluted with 22 g of xylene. .
- 20 g of caprolactone polyol, 3 g of hexamethylene diisocyanate, and 15 g of propylene glycol monomethyl ether acetate were added and reacted at 100 ° C. at 80 ° C. or lower.
- the reaction was terminated when the content of isocyanate became '0' as the reaction proceeded.
- the acid value of the synthesized polyester-modified urethane resin was 30 mgKOH / g, the hydroxyl value was 150 mgKOH / g.
- the reaction was carried out under a xylene reflux reaction, cooled to an acid value of 80 or less, and diluted with 24 g of xylene. .
- 20 g of caprolactone polyol, 3 g of hexamethylene diisocyanate, and 15 g of propylene glycol monomethyl ether acetate were added and reacted at 100 ° C. at 80 ° C. or lower.
- the reaction was terminated when the content of isocyanate became '0' as the reaction progressed.
- the acid value of the synthesized polyester-modified urethane resin was 60 mgKOH / g, and the hydroxyl value was 280 mgKOH / g.
- the final viscosity was adjusted to 35 seconds with Pod Cup # 4 for automotive clear coat
- the composition was prepared.
- the first base coat dry film thickness: 12-16 microns
- the second base coat dry film thickness: 10-20 microns
- Hot air was blown to evaporate the water remaining in the paint.
- the clearcoat compositions of Examples 1, 2, 3, 4 and Comparative Examples 1, 2, and 3 were respectively coated thereon, and cured at 140 ° C. for 25 minutes in a general oven to form a final coating film.
- Silane-modified acrylic polyol resin Silane-modified acrylic polyol resin (KCC) having a solid content of 70%, a weight average molecular weight (Mw) of 8,000, a hydroxyl value of 75 to 95 mgKOH / g, and a glass transition temperature of 35 to 45 ° C.
- Silicone leveling agent Silicone leveling agent (BYK-331, BYK)
- Light stabilizer 1 Benzotriazole type (Tinuvin 384, BASF Corporation)
- Light stabilizer 2 Hinderd Amine Light Stabilizer (Tinuvin292, BASF Corporation)
- Adhesiveness After making 100 pieces of 2mm crosscut, remove it using scotch tape and judge it as “good” when there is no problem, and evaluate it as “excellent” when there is no falling in the crosscutting part of the blade.
- Scratch resistance A method of measuring the resistance to scratches of a finished film by using an automotive scratch resistance measuring instrument (AMTEC-KISTER). ) And evaluated. (The higher the value, the better.) The measurement result is ⁇ -Excellent if glossiness retention rate (%) is 70% or more, ⁇ -Good if 60-65%, ⁇ -Normal, If it is less than 55%, it is judged as X-defect
- Hardness Measured by the pencil hardness method (3B, 2B, B, HB, F, H, 2H, 3H, the hardness measurement does not damage the coating film with each pencil). The measurement results are expressed as ⁇ -excellent (above HB), ⁇ -good (B), and ⁇ -defective (below 2B).
- the coating layers of Examples 1 to 3 formed of the clearcoat composition of the present invention without a separate intermediate coating layer forming process have good coating appearance and mechanical properties.
- the mechanical properties associated with the coating film elasticity such as scratch resistance, cold chipping resistance, impact properties.
- Comparative Example 1 which does not include the polyester-modified urethane resin of the present invention was evaluated for the scratch resistance, cold resistance and impact resistance moderate or poor
- Comparative Example 2 in which the polyester-modified urethane resin is excessively Hardness and water resistance were rated moderate or poor
- Comparative Example 3 using the polyester-modified urethane resin of the present invention and the polyester-modified urethane resin in which the range of acid value and hydroxyl value is different, it was found that cold resistance chipping resistance and impact resistance were evaluated as moderate or poor.
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Abstract
Description
Claims (12)
- 수지 구성 단위로서, (1) 지방족 다가 알코올과 지방족 또는 지환족 다가산으로부터 얻어지는 폴리에스터 유래 단위, (2) 카프로락톤 폴리올 유래 단위 및 (3) 지방족 디이소시아네이트 유래 단위를 포함하는, 폴리에스터 변성 우레탄 수지.
- 제1항에 있어서, 지방족 다가 알코올이 수산기를 2개 이상 갖는 탄소수 3 내지 12의 지방족 화합물 1종 이상인, 폴리에스터 변성 우레탄 수지.
- 제1항에 있어서, 지방족 다가 알코올이 프로판디올, 부탄디올, 네오펜틸 글리콜, 트리메틸올 프로판 및 이들의 조합으로부터 선택되는, 폴리에스터 변성 우레탄 수지.
- 제1항에 있어서, 지방족 또는 지환족 다가산이 카르복시산기를 2개 이상 갖는 탄소수 3 내지 12의 지방족 다가산 1종 이상, 또는 카르복시산기를 2개 이상 갖는 탄소수 5 내지 12의 지환족 다가산 1종 이상, 또는 이들의 혼합물인, 폴리에스터 변성 우레탄 수지.
- 제1항에 있어서, 지방족 또는 지환족 다가산이 헥산디카르복시산, 사이클로헥실디카르복시산 및 이들의 조합으로부터 선택되는, 폴리에스터 변성 우레탄 수지.
- 제1항에 있어서, 지방족 디이소시아네이트가 2개의 이소시아네이트기를 갖는 탄소수 4 내지 20의 지방족 또는 지환족 탄화수소 화합물 1종 이상인, 폴리에스터 변성 우레탄 수지.
- 제1항에 있어서, 지방족 디이소시아네이트가 헥사메틸렌 디이소시아네이트, 이소포론 디이소시아네이트, 디사이클로헥실메탄 디이소시아네이트 및 이들의 조합으로부터 선택되는, 폴리에스터 변성 우레탄 수지.
- 제1항에 있어서, 30~200 mgKOH의 수산기가 및 1~50mgKOH/g의 산가를 갖는 것인, 폴리에스터 변성 우레탄 수지.
- (a) 지방족 다가 알코올과 지방족 또는 지환족 다가산을 반응시켜 폴리에스터 중간체를 합성하는 단계; 및 (b) 상기 합성된 폴리에스터 중간체, 카프로락톤 폴리올 및 지방족 디이소시아네이트를 반응시켜 폴리에스터 변성 우레탄 수지를 합성하는 단계를 포함하는, 폴리에스터 변성 우레탄 수지의 제조방법.
- 조성물 총 100중량부를 기준으로, 제1항 내지 제8항중 어느 한 항의 폴리에스터 변성 우레탄 수지 5~30 중량부; 실란변성 아크릴 폴리올 수지 20~60 중량부; 경화제 5~30 중량부; 경화촉매 0.5~3 중량부; 및 용제 10~25 중량부를 포함하는 클리어코트 조성물.
- 제10항에 있어서, 실란변성 아크릴 폴리올 수지의 중량평균 분자량(Mw)이 5,000~10,000이고, 수산기가가 20~120 mgKOH/g이며, 유리전이온도가 10~80℃인, 클리어코트 조성물.
- 제10항의 클리어코트 조성물로부터 형성된 하나 이상의 코팅층을 포함하는 성형품.
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CN201580070053.3A CN107108853B (zh) | 2014-12-24 | 2015-04-15 | 高弹性聚酯改性的氨基甲酸乙酯树脂及包含其的透明涂料组合物 |
US15/539,248 US10239986B2 (en) | 2014-12-24 | 2015-04-15 | Highly elastic polyester modified urethane resin and clear coat composition containing same |
EP15873403.8A EP3239204B1 (en) | 2014-12-24 | 2015-04-15 | Highly elastic polyester modified urethane resin, and clear coat composition containing same |
JP2017534558A JP6454018B2 (ja) | 2014-12-24 | 2015-04-15 | 高弾性ポリエステル変性ウレタン樹脂及びこれを含むクリアコート組成物 |
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KR101944707B1 (ko) * | 2018-09-28 | 2019-02-01 | 박도선 | 차량의 판금도장방법 |
KR101944706B1 (ko) * | 2018-09-28 | 2019-04-17 | 박도선 | 차량의 보수도장방법 |
KR102557478B1 (ko) | 2020-12-10 | 2023-07-19 | 한국화학연구원 | 이황화 폴리우레탄 디올 부가물, 이를 포함하는 클리어코트 조성물 및 그 용도 |
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JP6454018B2 (ja) | 2019-01-16 |
KR20160078683A (ko) | 2016-07-05 |
JP2018505936A (ja) | 2018-03-01 |
CN107108853A (zh) | 2017-08-29 |
EP3239204A4 (en) | 2017-12-06 |
EP3239204B1 (en) | 2018-12-19 |
US20180022858A1 (en) | 2018-01-25 |
US10239986B2 (en) | 2019-03-26 |
EP3239204A1 (en) | 2017-11-01 |
KR101679683B1 (ko) | 2016-11-28 |
CN107108853B (zh) | 2020-07-14 |
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