Black top paint with high blackness and blue phase, and preparation method thereof

A blue-phase black topcoat and high blackness technology, which is applied in the preparation of high-blackness blue-phase black topcoat and the field of high-blackness blue-phase black topcoat, can solve the problem of not being able to meet the requirements of performance and blackness Appearance requirements for high-end cars, problems affecting the performance of topcoats, etc., to achieve excellent matching, high fullness, and good hardness

Inactive Publication Date: 2015-01-28

ZHENGZHOU YUTONG BUS CO LTD

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AI-Extracted Technical Summary

Problems solved by technology

However, ordinary polyurethane black topcoat has problems of insufficient blackness and reddish-brown phase, which cannot meet the appearance requirements of high-end cars; if the blackness requirement is met by increasing...

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Abstract

The invention discloses a black top paint with high blackness and blue phase, and a preparation method thereof. The top paint is composed of the following components by weight: 55-75 parts of a hydroxyl acrylic resin, 10-15 parts of a hydroxyl polyester resin, 0.25-0.55 parts of a leveling agent, 1.5-4.0 parts of a light stabilizer, 2.0-3.0 parts of high coloring carbon black, 2.0-3.0 parts of a wetting dispersant, 0.2-0.4 part of a synergistic dispersant, 0.03-0.05 part of a catalyst and 12-16 parts of a solvent. The black top paint with high blackness and blue phase is compounded by the hydroxyl acrylic resin, the hydroxyl polyester resin and a plurality of auxiliary agents, and has the advantages of excellent overcoatability, good leveling property, good weather resistance, good hardness and good scratch resistance. Compared with conventional black top paint, the black top paint provided by the invention has high blackness, high blue phase, high glossiness, high distinctness and high fullness, and can meet requirements for high-grade black top paint by coating and repairing in car and automobile industries.

Application Domain

Polyurea/polyurethane coatings

Technology Topic

SolventWeather resistance +6

Examples

Experimental program(6)
Comparison scheme(6)
Effect test(1)

Example Embodiment

[0037] Example 1

[0038] The high-blackness blue phase black topcoat of this embodiment is mainly composed of the following components by weight: 50 parts of high hydroxyl value hydroxy acrylic resin, 10 parts of medium hydroxyl value hydroxy acrylic resin, and 15 parts of hydroxy polyester resin , Acrylic leveling agent 0.3 parts, silicone leveling agent 0.1 parts, ultraviolet light absorber 3.0 parts, hindered amine light stabilizer 1.0 part, high pigment carbon black 2.5 parts, wetting and dispersing agent 2.5 parts, synergistic dispersing agent 0.3 parts, 0.04 parts of organotin catalyst, 8 parts of propylene glycol methyl ether acetate, 2 parts of butyl acetate, 3.26 parts of xylene, and 2 parts of mixed dimethyl nylate.

[0039] Wherein, the hydroxyl value of the high hydroxyl value hydroxy acrylic resin is 146mgKOH/g; the solid content is 80% (solvent is n-butyl acetate), the acid value is 11.0mgKOH/g, and the viscosity is 6000-9000cps/25°C. The hydroxyl value of the hydroxy acrylic resin with medium hydroxyl value is 100mgKOH/g; the solid content is 75% (solvent is n-butyl acetate), the acid value is 8.0mgKOH/g, and the viscosity is 4000-8000cps/25°C. The hydroxyl value of the hydroxyl polyester resin is 142 mgKOH/g; the solid content is 85% (solvent is n-butyl acetate), and the viscosity is 2000-3000 cps/25°C. The particle size of the high pigment carbon black is less than or equal to 5 nm (FW200 from Degussa).

[0040] The acrylic leveling agent is BYK358N (commercially available product, BYK Chemie, Germany); the silicone leveling agent is polyether modified polydimethylsiloxane; the ultraviolet light absorber is TINUVIN1130 (Commercial product, BASF (Ciba)); The hindered amine light stabilizer is YINUVIN292 (commercial product, BASF (Ciba)); The wetting and dispersing agent is BYK2000 (Commercial product, Germany Gram Chemical Company); the synergistic dispersant is BYK 2100 (commercial product, BYK Chemie, Germany); the organotin catalyst is T-12 catalyst (commercial product, Air Chemical Company).

[0041] The preparation method of the high-blackness blue phase black topcoat of this embodiment includes the following steps:

[0042] 1) Mix 8 parts by weight of propylene glycol methyl ether acetate, 1.6 parts by weight of butyl acetate, 2.5 parts by weight of wetting and dispersing agent, 2.5 parts by weight of high-pigment carbon black, and 0.3 parts by weight of synergistic dispersant, and stir at 500r/min After 5 minutes, add 50 parts by weight of hydroxy acrylic resin with high hydroxyl value, stir for 10 minutes at 500r/min and mix uniformly. After sealing and standing for 4 hours, place it in a sand mill for grinding to obtain mixture A and mixture A. Degree ≤10μm;

[0043] 2) Mix 0.04 parts by weight of organotin catalyst and 0.4 parts by weight of butyl acetate uniformly to obtain a mixed catalyst; take 10 parts by weight of hydroxy acrylic resin with medium hydroxyl value, 15 parts by weight of hydroxy polyester resin, and acrylic leveling agent 0.3 parts by weight, 0.1 parts by weight of silicone leveling agent, 3.0 parts by weight of ultraviolet light absorber, 1.0 part by weight of hindered amine light stabilizer and mixed catalyst, are added to the mixture A obtained in step 1) in sequence, and under the condition of 800r/min Stir for 20min and mix evenly to obtain mixture B;

[0044] 3) Take the mixture B obtained in step 2), add the remaining solvent of the formula (3.26 parts by weight of xylene, 2 parts by weight of mixed dimethyl nylonate), stir at 600r/min for 20 minutes and mix well, then use a 10 mesh sieve Net filter, that is.

[0045] The high blackness blue phase black topcoat of this embodiment is mixed with the curing agent at a ratio of 0.95:1 molar ratio of the hydroxyl groups of all resins in the black topcoat to the isocyanate groups in the curing agent during use. The curing agent is a mixture of isocyanate and mixed solvent B in a volume ratio of 55:45. The mixed solvent B is a mixture of four solvents, butyl acetate, xylene, trimethylbenzene, and mixed dimethyl nylate.

Example Embodiment

[0046] Example 2

[0047] The high blackness blue phase black topcoat of this embodiment is mainly composed of the following components by weight: 60 parts of high hydroxyl value hydroxy acrylic resin, 8 parts of medium hydroxyl value hydroxy acrylic resin, and 10 parts of hydroxy polyester resin , 0.2 parts of acrylic leveling agent, 0.05 parts of silicone leveling agent, 2.0 parts of ultraviolet light absorber, 0.7 parts of hindered amine light stabilizer, 2.5 parts of high pigment carbon black, 2.5 parts of wetting and dispersing agent, synergistic dispersing agent 0.3 parts, 0.04 parts of organotin catalyst, 7 parts of propylene glycol methyl ether acetate, 2 parts of butyl acetate, 2.71 parts of xylene, 2 parts of mixed dimethyl nylonate.

[0048] Wherein, the hydroxyl value of the high hydroxyl value hydroxy acrylic resin is 142 mgKOH/g; the solid content is 75% (solvent is n-butyl acetate), the acid value is 13.0 mgKOH/g, and the viscosity is 6000-8000cps/25°C. The hydroxyl value of the hydroxy acrylic resin with medium hydroxyl value is 106 mgKOH/g; the solid content is 70% (solvent is n-butyl acetate), the acid value is 9.0 mgKOH/g, and the viscosity is 4000-6000cps/25°C. The hydroxyl value of the hydroxyl polyester resin is 154 mgKOH/g; the solid content is 80% (the solvent is n-butyl acetate), and the viscosity is 2000-3000 cps/25°C. The particle size of the high pigment carbon black is less than or equal to 5 nm (FW200 from Degussa).

[0049] The acrylic leveling agent is BYK358N (commercially available product, BYK Chemie, Germany); the silicone leveling agent is polyester-modified polydimethylsiloxane; the ultraviolet light absorber is TINUVIN1130 (Commercial product, BASF (Ciba)); The hindered amine light stabilizer is YINUVIN292 (commercial product, BASF (Ciba)); The wetting and dispersing agent is BYK2000 (Commercial product, Germany Gram Chemical Company); the synergistic dispersant is BYK 2100 (commercial product, BYK Chemie, Germany); the organotin catalyst is T-12 catalyst (commercial product, Air Chemical Company).

[0050] The preparation method of the high-blackness blue phase black topcoat of this embodiment includes the following steps:

[0051] 1) Mix 7 parts by weight of propylene glycol methyl ether acetate, 1.5 parts by weight of butyl acetate, 2.5 parts by weight of wetting and dispersing agent, 2.5 parts by weight of high-pigment carbon black, and 0.3 parts by weight of synergistic dispersant, and stir under 400r/min After 10 minutes, add 60 parts by weight of hydroxy acrylic resin with high hydroxyl value, stir for 10 minutes at 400r/min and mix uniformly. After sealing and standing for 4 hours, place it in a sand mill for grinding to obtain mixture A and mixture A. Degree ≤10μm;

[0052] 2) Mix 0.04 parts by weight of organotin catalyst and 0.5 parts by weight of butyl acetate to obtain a mixed catalyst; take 8 parts by weight of hydroxyl acrylic resin, 10 parts by weight of hydroxyl polyester resin, and acrylic leveling agent 0.2 parts by weight, 0.05 parts by weight of organosilicon leveling agent, 2.0 parts by weight of ultraviolet light absorber, 0.7 parts by weight of hindered amine light stabilizer and mixed catalyst are added to the mixture A obtained in step 1) in sequence, and under 700r/min Stir for 30min and mix evenly to obtain mixture B;

[0053] 3) Take the mixture B obtained in step 2), add the remaining solvent of the formula (2.71 parts by weight of xylene, 2 parts by weight of mixed dimethyl nylate), stir for 10 minutes at 800r/min and mix well, then use a 10 mesh sieve Net filter, that is.

[0054] The high blackness blue phase black topcoat of this embodiment is mixed with the curing agent at a ratio of 1:1 in molar ratio of the hydroxyl groups of all resins in the black topcoat to the isocyanate groups in the curing agent. The curing agent is a mixture of isocyanate and mixed solvent B in a volume ratio of 55:45. The mixed solvent B is a mixture of four solvents, butyl acetate, xylene, trimethylbenzene, and mixed dimethyl nylate.

Example Embodiment

[0055] Example 3

[0056] The high blackness blue phase black topcoat of this embodiment is mainly composed of the following components by weight: 65 parts of high hydroxyl value hydroxy acrylic resin, 5 parts of medium hydroxyl value hydroxy acrylic resin, and 10 parts of hydroxy polyester resin , 0.4 part of acrylic leveling agent, 0.15 part of silicone leveling agent, 1.0 part of ultraviolet light absorber, 0.5 part of hindered amine light stabilizer, 2.5 part of high pigment carbon black, 2.5 part of wetting and dispersing agent, synergistic dispersing agent 0.3 parts, 0.04 parts of organotin catalyst, 6 parts of propylene glycol methyl ether acetate, 3.5 parts of butyl acetate, 1.61 parts of xylene, 1.5 parts of mixed dimethyl nylate.

[0057] Wherein, the hydroxyl value of the high hydroxyl value hydroxy acrylic resin is 145mgKOH/g; the solid content is 80% (solvent is n-butyl acetate), the acid value is 12.0mgKOH/g, and the viscosity is 6000-10000cps/25°C. The hydroxyl value of the hydroxy acrylic resin with medium hydroxyl value is 100mgKOH/g; the solid content is 70% (solvent is n-butyl acetate), the acid value is 11.0mgKOH/g, and the viscosity is 7000-9000cps/25°C. The hydroxyl value of the hydroxyl polyester resin is 152 mgKOH/g; the solid content is 100%, and the viscosity is 2000-4000 cps/25°C. The particle size of the high pigment carbon black is less than or equal to 5 nm (FW200 from Degussa).

[0058] The acrylic leveling agent is BYK358N (commercially available product, BYK Chemie, Germany); the silicone leveling agent is polyether modified polydimethylsiloxane; the ultraviolet light absorber is TINUVIN1130 (Commercial product, BASF (Ciba)); The hindered amine light stabilizer is YINUVIN292 (commercial product, BASF (Ciba)); The wetting and dispersing agent is BYK2000 (Commercial product, Germany Gram Chemical Company); the synergistic dispersant is BYK 2100 (commercial product, BYK Chemie, Germany); the organotin catalyst is T-12 catalyst (commercial product, Air Chemical Company).

[0059] The preparation method of the high-blackness blue phase black topcoat of this embodiment includes the following steps:

[0060] 1) Mix 6 parts by weight of propylene glycol methyl ether acetate, 3 parts by weight of butyl acetate, 2.5 parts by weight of wetting and dispersing agent, 2.5 parts by weight of high-pigment carbon black, and 0.3 parts by weight of synergistic dispersant, and stir at 600r/min After 5 minutes, add 65 parts by weight of hydroxy acrylic resin with high hydroxyl value, stir for 7 minutes at 600r/min and mix uniformly. After sealing and standing for 10 hours, place it in a sand mill for grinding to obtain mixture A and mixture A. Degree ≤10μm;

[0061] 2) Mix 0.04 parts by weight of organotin catalyst and 0.5 parts by weight of butyl acetate to obtain a mixed catalyst; take 5 parts by weight of hydroxy acrylic resin with medium hydroxyl value, 10 parts by weight of hydroxy polyester resin, and acrylic leveling agent 0.4 parts by weight, 0.15 parts by weight of silicone leveling agent, 1.0 parts by weight of ultraviolet light absorber, 0.5 parts by weight of hindered amine light stabilizer and mixed catalyst, are added to the mixture A obtained in step 1) in sequence, and under the condition of 1000r/min Stir for 20min and mix evenly to obtain mixture B;

[0062] 3) Take the mixture B obtained in step 2), add the remaining solvent of the formula (1.61 parts by weight of xylene, 1.5 parts by weight of mixed dimethyl nylate), stir at 500r/min for 20 minutes and mix well, then use a 10 mesh sieve Net filter, that is.

[0063] The high blackness blue phase black topcoat of this embodiment is mixed with the curing agent at a ratio of 0.97:1 molar ratio of the hydroxyl groups of all resins in the black topcoat to the isocyanate groups in the curing agent during use. The curing agent is a mixture of isocyanate and mixed solvent B in a volume ratio of 55:45. The mixed solvent B is a mixture of four solvents, butyl acetate, xylene, trimethylbenzene, and mixed dimethyl nylate.

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PUM

Property	Measurement	Unit
Hydroxyl value	146.0	mgKOH/g
Acid value	11.0	mgKOH/g
Hydroxyl value	100.0	mgKOH/g
tensile		MPa
Particle size		Pa
strength	10

Description & Claims & Application Information

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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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