Environment-friendly water-based polycarbonate printing resin slurry as well as preparation method and application thereof

Abstract

The invention relates to environment-friendly water-based poly-carbon printing resin slurry as well as a preparation method and application thereof. The environment-friendly water-based poly-carbon printing resin slurry is prepared from the following components in parts by weight: 100 parts of water-based poly-carbon printing resin, 1-10 parts of water-based color paste and 0.6-1.5 parts of a crosslinking curing agent, the cross-linking curing agent comprises a water-based blocked aliphatic polyisocyanate cross-linking agent and a hydrophilic modified isocyanate curing agent. The environment-friendly water-based polycarbonate printing resin slurry provided by the invention has better bonding performance with a synthetic leather base material, can be comparable with a solvent type resin printing slurry, has better environment-friendly performance and is odorless, printed patterns can meet the hydrolysis resistance requirement for 5-7 years, and the color of the leather surface printing resin is not discolored at constant temperature and humidity (70 DEG C * 95% RH * 5W).

Description

Technical Field

[0001] The invention relates to the technical field of polymer materials, and in particular to an environmentally friendly water-based polycarbonate printing resin slurry and a preparation method and application thereof. Background Art

[0002] Synthetic leather is a plastic product that simulates the composition and structure of natural leather and can be used as a substitute material for it. It is usually made of impregnated non-woven fabric as a mesh layer and a microporous polyurethane layer as a grain layer. Both its front and back sides are very similar to leather and have a certain degree of air permeability. It is closer to natural leather than ordinary artificial leather and is widely used in the production of shoes, boots, bags and balls.

[0003] In the production of synthetic leather, it is necessary to print on the surface of synthetic leather. At present, oily resin slurry is mainly used for surface printing on synthetic leather. Oily resin printing has good bonding with polyurethane dry surface layer, but traditional oily resin printing produces organic solvents, which are easy to evaporate in the air, have a large odor, exceed the VOC standard, have a low safety factor, are easy to absorb water, and are not environmentally friendly. They not only cause serious pollution to the production environment and the surrounding living environment, but also affect the health of production and users. Summary of the invention

[0004] Based on this, the purpose of the present invention is to provide an environmentally friendly water-based polycarbonate printing resin slurry and a preparation method and application thereof. The environmentally friendly water-based polycarbonate printing resin slurry has good bonding performance with a synthetic leather substrate, which is comparable to a solvent-based resin printing slurry, has good environmental performance and is odorless.

[0005] To achieve the above object, the present invention adopts the following technical solutions: The present invention first provides an environmentally friendly water-based polycarbonate printing resin slurry, which is prepared from the following components in parts by weight: 100 parts of water-based polycarbonate printing resin, 1-10 parts of water-based color paste, and 0.6-1.5 parts of a cross-linking curing agent; the cross-linking curing agent comprises a water-based blocked aliphatic polyisocyanate cross-linking agent and a hydrophilic modified isocyanate curing agent.

[0006] The environmentally friendly water-based polycarbonate printing resin slurry provided by the present invention has good bonding performance with a synthetic leather substrate, which is comparable to a solvent-based resin printing slurry, has good environmental performance and is odorless, and the printed pattern can meet the hydrolysis resistance requirement of 5-7 years, and the leather surface printing resin color does not fade under constant temperature and humidity (70°C*95%RH*5W).

[0007] As a further improvement of the above solution of the present invention, the water-based polycarbon printing resin includes water-based bright surface polycarbon printing resin and / or water-based matte surface polycarbon printing resin.

[0008] As a further improvement of the above-mentioned solution of the present invention, the preparation method of the water-based bright surface polycarbon printing resin comprises the following steps: S11. Weigh water-based polycarbonate resin, deionized water, polyurethane associative thickener, water-based wetting and leveling agent, water-based stripping agent, water-based defoamer, noise reduction agent, non-ionic associative polyurethane thickener according to proportion; S12. Deionized water was added to the mixer and the mixer speed was controlled at 500-800r / min, the urethane associative thickener and the nonionic associative polyurethane thickener were added to the mixer and stirred to obtain a mixture A; S13. Sequentially add an aqueous wetting and leveling agent, an aqueous stripping agent, an aqueous defoaming agent, and a noise reduction feel agent to the mixture A, and stir to obtain a mixture B; S14. Add water-based polycarbonate resin to the mixture B, control the speed of the stirrer to 1000-1500 r / min, and stop stirring when the viscosity reaches 2500±500 CPS / 25°C to obtain a water-based glossy polycarbonate printing resin.

[0009] As a further improvement of the above scheme of the present invention, the weight parts of the components in the water-based bright polycarbonate printing resin are: 30 parts of water-based polycarbonate resin, 70 parts of deionized water, 1-3 parts of urethane associative thickener, 0.5-1 parts of water-based wetting and leveling agent, 0.1-0.3 parts of water-based stripping agent, 0.1-0.5 parts of water-based defoaming agent, 0.1-0.5 parts of noise reduction feel agent, and 0.5-2 parts of non-ionic associative polyurethane thickener.

[0010] As a further improvement of the above-mentioned solution of the present invention, the preparation method of the water-based matte polycarbon printing resin comprises the following steps: S21 weighed water-based polycarbonate resin, deionized water, urethane associative thickener, water-based wetting and leveling agent, water-based stripping agent, water-based defoaming agent, silica matting powder in proportion; S22. Deionized water was added to the mixer and the mixer speed was controlled at 500-800 r / min, the urethane associative thickener was added to the mixer and stirred to obtain a mixture C; S23. Sequentially add an aqueous wetting and leveling agent, an aqueous defoaming agent, and an aqueous stripping agent to the mixture C, and stir to obtain a mixture D; S24. Add water-based polycarbonate resin to the mixture D, control the stirrer speed at 1000-1500r / min, and stop stirring when the viscosity reaches 2500±500CPS / 25°C to obtain a water-based semi-finished matte polycarbonate printing resin; S25. Mix the semi-finished water-based matte polycarbon printing resin with the water-based bright polycarbon printing resin obtained in step S14, and stir evenly to obtain a water-based matte polycarbon printing resin.

[0011] As a further improvement of the above scheme of the present invention, in step S24, the weight parts of the components of the aqueous semi-finished matte polycarbonate printing resin are: 30 parts of aqueous polycarbonate resin, 70 parts of deionized water, 0.5-1 parts of urethane associative thickener, 0.5-1 parts of aqueous wetting and leveling agent, 0.1-0.3 parts of aqueous stripping agent, 0.1-0.5 parts of aqueous defoaming agent, and 8-12 parts of silica matting powder.

[0012] As a further improvement of the above solution of the present invention, in step S25, the weight ratio of the aqueous semi-finished matte polycarbon printing resin to the aqueous bright polycarbon printing resin is 3-4.5:7-10.5.

[0013] As a further improvement of the above scheme of the present invention, the water-based polycarbon printing resin includes a water-based bright polycarbon printing resin and a water-based matte polycarbon printing resin, and its preparation method is: the water-based bright polycarbon printing resin and the water-based matte polycarbon printing resin are mixed in a weight ratio of 1-8:1-4.

[0014] In the present invention, the viscosity of the water-based polycarbonate printing resin cannot be too low. If the viscosity is too low, it is easy to generate water ripples when transferred to the substrate surface during the printing process, and the pattern is unclear. The viscosity is controlled at 2500±500CPS in winter and 3000±500CPS in summer. In order to better control the viscosity of the water-based polycarbonate printing resin, it is stipulated that it should be kept warm in a high and low temperature test box in winter before testing. When the temperature in the high and low temperature test box is controlled at 25°C, 200ml of the prepared water-based polycarbonate printing slurry resin is taken with a measuring cup, kept warm for 50 minutes, and the viscosity is tested to see if it is 2500±500CPS. If the viscosity does not reach the standard, an urethane associative thickener can be appropriately added for stirring.

[0015] The present invention also provides a method for preparing the above-mentioned environmentally friendly water-based polycarbonate printing resin slurry, characterized in that the water-based polycarbonate printing resin and the water-based color paste are put into a mixer in proportion and the rotation speed is controlled to be 500-800r / min for stirring; then the cross-linking agent is put into the mixer in proportion and the rotation speed is controlled to be 800-1000r / min for stirring, and when the viscosity reaches 2500±500CPS / 25°C, the stirring is stopped to obtain the environmentally friendly water-based polycarbonate printing resin slurry.

[0016] The present invention also provides an application of the above-mentioned environmentally friendly water-based polycarbonate printing resin slurry in printing on the surface of synthetic leather.

[0017] As a further improvement of the above scheme of the present invention, the application includes the following steps: transferring the environmentally friendly water-based polycarbonate printing resin slurry to the surface of synthetic leather through a printing wheel, and printing patterns of different patterns through an oven for shaping; the oven temperature is 155±5°C.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. The environmentally friendly water-based polycarbonate printing resin slurry provided by the present invention has good bonding performance with the synthetic leather substrate, which is comparable to the printing slurry of the solvent-based resin, has good environmental performance and is odorless, and the printed pattern can meet the hydrolysis resistance requirements of 5-7 years, and the color of the leather surface printing resin does not fade under constant temperature and humidity (70℃*95%RH*5W).

[0019] 2. The surface tension of the environmentally friendly water-based polycarbonate printing resin slurry of the present invention is higher than the surface tension of most synthetic leather substrates. In order to ensure that the environmentally friendly water-based polycarbonate printing resin slurry carrier of the present invention forms a pattern on the substrate surface in synthetic leather printing, a wetting and leveling agent is added in advance when preparing the water-based polycarbonate printing resin, which can reduce the tension of the water-based polycarbonate printing resin, so that the pattern can be effectively transferred to the substrate surface during the later production printing. The water-based printing resin slurry printed on the slurry substrate is dried and shaped in an oven, so that the pattern is clearly and fully attached to the surface of the substrate. DETAILED DESCRIPTION

[0020] For ease of understanding of the present invention, the present invention will be described more fully below in conjunction with specific embodiments. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0022] The specific information of the raw materials used in the following examples and comparative examples is as follows: Deionized water: Homemade, using advanced equipment water purifiers to purify and remove sodium, calcium, iron, copper and other elements in tap water through RO reverse osmosis method to obtain deionized water; Water-based polycarbonate resin: W-9033-1, purchased from Ningbo Norli Chemical Technology Co., Ltd.; W-9033-1 resin type, the film-forming material after film formation is water-based polycarbonate polyurethane, and water-based polyurethane resin is generally a multi-polymer. Solid content 18.7% to 22.7%. The film has good alcohol resistance (analytical pure industrial alcohol, one kilogram of pressure more than 50 times), yellowing resistance level 4, xenon lamp more than 300 hours, jungle aging resistance, hydrolysis resistance, oil resistance, application direction: PU, microfiber, solvent-free, PVC substrate sofa leather, car leather, box leather, clothing leather, etc.; Non-ionic associative polyurethane thickener: HEUR-A50, purchased from Hefei Anke Fine Chemical Co., Ltd.; HEUR-A50 is a highly efficient non-ionic polyurethane thickener that can effectively increase the medium and high shear viscosity of the water-based system, greatly improve the fluidity of the coating, improve storage stability, and achieve an ideal balance between medium and high shear viscosity, and excellent leveling and anti-sagging performance; Urethane associative thickener: RM-13-622, purchased from Stahl Coatings Fine Chemicals Co., Ltd.; light gray opaque liquid, solid content: 20±2%, applicable scope: can be used for thickening of various water-based polymer formulations, especially recommended for thickening of acrylic and / or vinyl homopolymer or copolymer formulation systems, and can also be used for thickening in polyurethane formulations; Water-based wetting and leveling agent: A-1, purchased from Ningde Yifan New Materials Co., Ltd.; A-1 water-based wetting and leveling agent is a wetting and leveling agent product with modified polydimethylsiloxane as the main component, which is used in water-based polyurethane products. This product has excellent wetting and leveling effects, good compatibility, and is widely used in water-based coatings, water-based inks, water-based adhesives, etc.; Water-based stripping agent: SY-8300, purchased from Jiangxi Mitsukoshi New Materials Co., Ltd.; SY-8300 stripping aid, a polyether-modified polysiloxane, can be used as a stripping aid for water-based and solvent-based systems, and is suitable for the transfer of resin slurry on the substrate surface and the printing wheel; Water-based defoamer: TEGO® Foamex 810, purchased from Evonik (China) Investment Co., Ltd.; TEGO® Foamex 810 is a highly efficient defoamer concentrate based on polyether siloxane technology. It is a universal defoamer in the grinding stage and can be used in the paint mixing stage to eliminate large and micro bubbles when it has sufficient shear strength. Noise reduction feel agent: WynCoat* SE-7037, purchased from Hangzhou Chongyao Technology Development Co., Ltd.; WynCoat* SE-7037 noise reduction feel agent, appearance: slightly yellow translucent liquid, solid content 25-30%, emulsion type is non-ionic, with a moist and soft feel, good noise reduction effect, this product is a silicone emulsion developed for leather surface noise reduction, in the water-based surface treatment system can greatly reduce the difference between static friction and dynamic friction, effectively reduce the generation of squeaking on the leather surface, thereby achieving excellent noise reduction and friction effect; Silica matting powder: AcemattOK520, purchased from Evonik (China) Investment Co., Ltd.; AcemattOK520 silica matting powder is a solid in powder state. Its main feature is that it can effectively play a matting role in water-based resin slurry. After mixing with resin, the powder has better coating performance; Water-based blocked aliphatic polyisocyanate crosslinker: Imprafix® 2794, purchased from Covestro Polymers (China) Co., Ltd.; Imprafix® 2794 is a curing agent used to improve reactivity and thermal stability (yellowing) for textile coatings of ImpraniI and Impraperm polyurethane dispersions; Hydrophilic modified isocyanate curing agent: Aquolin®166, purchased from Wanhua Chemical Group Co., Ltd.; Aquolin®166 hydrophilic modified isocyanate curing agent can be used in water-based two-component polyurethane systems, with high functionality, low viscosity, easy dispersion, long open time and other characteristics. When used with water-based polyurethane adhesive products, it can greatly improve the bonding strength, heat resistance, hydrolysis resistance and other properties of the bonded products, and is suitable for automotive interior adhesives, shoe adhesives, and plastic suction adhesives; Water-based color paste: purchased from Suzhou Shiming Technology Co., Ltd.

[0023] It should be noted that the above raw materials are only examples made to make the technical solution of the present invention clearer, and do not mean that the present invention can only adopt the above raw materials. The specific scope shall be subject to the claims.

[0024] Example 1 This embodiment provides an environmentally friendly water-based bright polycarbonate printing resin slurry, and the preparation method thereof comprises the following steps: S1. 70 parts by weight of deionized water was added to a mixer and the mixer speed was controlled at 500-800r / min, 3 parts by weight of an urethane associative thickener RM-13-622 and 2 parts by weight of a nonionic associative polyurethane thickener HEUR-A50 were added to the mixer and stirred to obtain a mixture A; S2. 1 part by weight of an aqueous wetting and leveling agent A-1, 0.3 parts by weight of an aqueous stripping agent SY-8300, 0.5 parts by weight of an aqueous defoaming agent TEGO® Foamex810, and 0.5 parts by weight of a noise reduction feel agent WynCoat * SE-7037 were sequentially added to the mixture A and stirred to obtain a mixture B; S3. Add 30 parts by weight of water-based polycarbonate resin W-9033-1 to the mixture B, control the stirrer speed at 1000-1500r / min, and stop stirring when the viscosity reaches 2500±500CPS / 25°C to obtain a water-based glossy polycarbonate printing resin; S4. 100 parts by weight of water-based bright polycarbonate printing resin and 5 parts by weight of water-based color paste are put into a mixer and stirred at a speed of 500-800 r / min to obtain the desired color effect; then 0.5 parts by weight of water-based blocked aliphatic polyisocyanate crosslinker Imprafix® 2794 and 0.3 parts by weight of hydrophilic modified isocyanate curing agent Aquolin® 166 are put into the mixer and stirred at a speed of 800-1000 r / min; when the viscosity reaches 2500±500 CPS / 25°C, stirring is stopped to obtain an environmentally friendly water-based bright polycarbonate printing resin slurry.

[0025] Example 2 This embodiment provides an environmentally friendly water-based matte polycarbonate printing resin slurry, and the preparation method thereof comprises the following steps: S1. 70 parts by weight of deionized water was added to a mixer and the mixer speed was controlled at 500-800r / min, 3 parts by weight of an urethane associative thickener RM-13-622 and 2 parts by weight of a nonionic associative polyurethane thickener HEUR-A50 were added to the mixer and stirred to obtain a mixture A; S2. 1 part by weight of an aqueous wetting and leveling agent A-1, 0.3 parts by weight of an aqueous stripping agent SY-8300, 0.5 parts by weight of an aqueous defoaming agent TEGO® Foamex810, and 0.5 parts by weight of a noise reduction feel agent WynCoat * SE-7037 were sequentially added to the mixture A and stirred to obtain a mixture B; S3. Add 30 parts by weight of water-based polycarbonate resin W-9033-1 to the mixture B, control the stirrer speed at 1000-1500r / min, and stop stirring when the viscosity reaches 2500±500CPS / 25°C to obtain a water-based glossy polycarbonate printing resin; S4. 70 parts by weight of deionized water was added to the mixer and the mixer speed was controlled at 500-800r / min, 12 parts by weight of silica matting powder AcemattOK520 was added to the mixer, and then 3 parts by weight of urethane associative thickener RM-13-622 was added to the mixer and stirred to obtain a mixture C; S5. Sequentially, 1 part by weight of an aqueous wetting and leveling agent A-1, 0.3 parts by weight of an aqueous stripping agent SY-8300, and 0.5 parts by weight of an aqueous defoaming agent TEGO® Foamex810 were added to the mixture C, and stirred to obtain a mixture D; S6. Add 30 parts by weight of water-based polycarbonate resin W-9033-1 to the mixture D, control the stirrer speed at 1000-1500r / min, and stop stirring when the viscosity reaches 2500±500CPS / 25°C to obtain a water-based semi-finished matte polycarbonate printing resin; S7. 30 parts by weight of an aqueous semi-finished matte polycarbon printing resin and 70 parts by weight of an aqueous bright polycarbon printing resin obtained in step S14 were mixed and stirred to obtain an aqueous matte polycarbon printing resin; S8. 100 parts by weight of water-based matte polycarbonate printing resin and 5 parts by weight of water-based color paste are put into a mixer and stirred at a speed of 500-800 r / min to obtain the desired color effect; then 0.5 parts by weight of water-based blocked aliphatic polyisocyanate crosslinker Imprafix® 2794 and 0.3 parts by weight of hydrophilic modified isocyanate curing agent Aquolin® 166 are put into the mixer and stirred at a speed of 800-1000 r / min; when the viscosity reaches 2500±500 CPS / 25°C, stirring is stopped to obtain an environmentally friendly water-based bright polycarbonate printing resin slurry.

[0026] Example 3 This embodiment provides an environmentally friendly water-based matte polycarbonate printing resin slurry, and the preparation method thereof comprises the following steps: S1. 60 parts by weight of the aqueous bright polycarbon printing resin prepared in Example 2 and 40 parts by weight of the aqueous matte polycarbon printing resin prepared in Example 2 were mixed and added to a mixer and the mixer speed was controlled at 500-800r / min, and stirred to obtain an aqueous polycarbon printing resin; S2. 100 parts by weight of water-based polycarbonate printing resin and 5 parts by weight of water-based color paste are put into a mixer and stirred at a speed of 500-800r / min to obtain the desired color effect; then 0.5 parts by weight of water-based blocked aliphatic polyisocyanate crosslinker Imprafix® 2794 and 0.3 parts by weight of water-modified isocyanate curing agent Aquolin® 166 are put into a mixer and stirred at a speed of 800-1000r / min; when the viscosity reaches 2500±500CPS / 25°C, stirring is stopped to obtain an environmentally friendly water-based bright polycarbonate printing resin slurry.

[0027] Comparative Example 1 This comparative example uses commercially available water-based printing resin.

[0028] Comparative Example 2 This comparative example uses commercially available oily printing resin.

[0029] Test Case The printing resin slurry prepared in Example 1-3 and Comparative Example 1-2 was printed on the surface of synthetic leather: the printing resin slurry was transferred to the surface of synthetic leather through a printing wheel, and different patterns were printed after being shaped in an oven; the oven temperature was 155±5°C, and the machine speed was 18±2min / m.

[0030] The prepared synthetic leather was subjected to performance tests, and the test results are shown in the following table. Flexural performance: According to the leather flexural resistance test standards of QB / T2714, CNS-7705, ASTM-D6182, and DIN-53351, fold the leather in half and bend it in the opposite direction, cut out a rectangular test piece of leather (70mm×45mm), and use a bending machine to bend it 100,000 times; In the wear resistance performance: ① Taber (500 times), according to the applicable standards of QB / T2726 and 5135 / 5155 Taber wear machine, use H18 grinding wheel and 1KG weight to rub the leather surface 500 times; ② Valspar (100,000), according to the applicable scope of ASTM D4157-13 (2017) wear test, cut the sample of 73mmx245mm, and the long side is parallel to the warp or weft. Woven fabrics should not be cut at the same warp or weft position, and rub 100,000 times; ③ Martindale (50,000-100,000), according to ASTM D496 Martindale wear resistance standard, cut (38mm×38mm) circular test piece leather and clamp it on the fixture, up to the specified load of 12Kpa pressure, and the wool felt below is wrapped on the fixture with friction cloth, and the machine is turned on for 50,000-100,000 times of wear; In the hydrolysis resistance performance, ① constant temperature and humidity, according to QB / T 4671-2014 constant temperature and humidity test box, synthetic leather hydrolysis resistance test standard, set the constant temperature and humidity box to 70℃ and relative humidity to 95%, and hang the sample in the test box after obtaining temperature and humidity insulation, and keep it warm for 5 weeks; ② room temperature natron for 24-48 hours, according to QB / T 4671-2014, put the analytical pure NaOH reagent into a beaker, add distilled water to make a 10% NaOH solution, stir with a glass rod and let it stand, and put the cut leather sample into it after it is dissolved and cooled; In the color fastness test, ① dry rub 500 times / wet rub 250 times / alcohol rub 50 times / acetone rub 10 times, according to the GB / T39366 friction test machine color fastness test standard, rub white cotton cloth (55mm×50mm) as required. Wrap the white cloth on the friction head and fasten it with a fixing ring. The test rate is a reciprocating friction cycle. The friction stroke is (104±3) mm, and the downward pressure is (9±0.2) N. ② gasoline rub 100 times. According to the JIS L0849 test standard, the wool felt square is wrapped with friction white cotton cloth (55mm×50mm) and rubbed 100 times in the gasoline test machine. Yellowing resistance: According to HG / T3689-2014 standard, a 30W, 220V±10V spiral lamp-type solar UV bulb is used, the wavelength is 280nm-400nmm, and the intensity of UV light is 25±0.4W / m 2 , irradiation for 3-12h; Needle-sewn large holes: sewn with nylon thread; Comparison of rubbing lines before and after: Determination by visual observation of the surface; Constant temperature and humidity 70℃*95%, 1 week hydrolysis resistance: According to QB / T 4671-2014 constant temperature and humidity test chamber, keep warm for 1 week; Anti-adhesion (130℃, 1kg, 2H): GB / T 8949-2008 Cut a sample, sandwich the coatings between two 60 mmX60 mmX3 mm glass clips, press a 10N load on the clips, put them in a constant temperature oven with a blast device at a temperature of (80±2)℃, and take out the sample after 3 hours of constant temperature; Surface touch and gloss: Determined by visual observation of the surface; The leather surface makes a sound when rubbing: there is no sound when rubbing the leather surface; Hot stamping 180℃: Hot stamping machine 180℃ for mirror film.

[0031]

[0032] It can be seen from the results in the above table that the embodiments of the present application have obtained an environmentally friendly water-based polycarbonate resin printing paste with good physical properties such as durability and wear resistance by adjusting the formula of each layer. The product is implemented in synthetic leather surface printing, and all test data meet the product requirements.

[0033] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0034] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An environmentally friendly water-based polycarbonate printing resin slurry, characterized in that: The invention is prepared from the following components in parts by weight: 100 parts of water-based polycarbonate printing resin, 1-10 parts of water-based color paste, and 0.6-1.5 parts of cross-linking curing agent; the cross-linking curing agent comprises a water-based blocked aliphatic polyisocyanate cross-linking agent and a hydrophilic modified isocyanate curing agent.

2. The environmentally friendly water-based polycarbonate printing resin slurry according to claim 1, characterized in that: The water-based polycarbonate printing resin includes water-based bright-surface polycarbonate printing resin and / or water-based matte-surface polycarbonate printing resin.

3. The environmentally friendly water-based polycarbonate printing resin slurry according to claim 2, characterized in that: The preparation method of the water-based bright-surface polycarbonate printing resin comprises the following steps: S11. Weigh water-based polycarbonate resin, deionized water, urethane associative thickener, water-based wetting and leveling agent, water-based stripping agent, water-based defoaming agent, noise reduction feel agent, non-ionic associative polyurethane thickener according to proportion; S12. Deionized water was added to the mixer and the mixer speed was controlled at 500-800r / min, the urethane associative thickener and the nonionic associative polyurethane thickener were added to the mixer and stirred to obtain a mixture A; S13. Sequentially add an aqueous wetting and leveling agent, an aqueous stripping agent, an aqueous defoaming agent, and a noise reduction feel agent to the mixture A, and stir to obtain a mixture B; S14. Add water-based polycarbonate resin to the mixture B, control the speed of the stirrer to 1000-1500 r / min, and stop stirring when the viscosity reaches 2500±500 CPS / 25°C to obtain a water-based glossy polycarbonate printing resin.

4. The environmentally friendly water-based polycarbonate printing resin slurry according to claim 3, characterized in that: The weight parts of the components in the water-based bright polycarbonate printing resin are: 30 parts of water-based polycarbonate resin, 70 parts of deionized water, 1-3 parts of urethane associative thickener, 0.5-1 parts of water-based wetting and leveling agent, 0.1-0.3 parts of water-based stripping agent, 0.1-0.5 parts of water-based defoaming agent, 0.1-0.5 parts of noise reduction feel agent, and 0.5-2 parts of non-ionic associative polyurethane thickener.

5. The environmentally friendly water-based polycarbonate printing resin slurry according to claim 3, characterized in that: The preparation method of the water-based matte polycarbonate printing resin comprises the following steps: S21 weighed water-based polycarbonate resin, deionized water, urethane associative thickener, water-based wetting and leveling agent, water-based stripping agent, water-based defoaming agent, silica matting powder in proportion; S22. Deionized water was added to the mixer and the mixer speed was controlled at 500-800 r / min, the urethane associative thickener was added to the mixer and stirred to obtain a mixture C; S23. Sequentially add an aqueous wetting and leveling agent, an aqueous defoaming agent, and an aqueous stripping agent to the mixture C, and stir to obtain a mixture D; S24. Add water-based polycarbonate resin to the mixture D, control the stirrer speed at 1000-1500r / min, and stop stirring when the viscosity reaches 2500±500CPS / 25°C to obtain a water-based semi-finished matte polycarbonate printing resin; S25. Mix the semi-finished water-based matte polycarbon printing resin with the water-based bright polycarbon printing resin obtained in step S14, and stir evenly to obtain a water-based matte polycarbon printing resin.

6. The environmentally friendly water-based polycarbonate printing resin slurry according to claim 5, characterized in that: In step S24, the weight parts of the components of the aqueous semi-finished matte polycarbonate printing resin are: 30 parts of aqueous polycarbonate resin, 70 parts of deionized water, 0.5-1 parts of urethane associative thickener, 0.5-1 parts of aqueous wetting and leveling agent, 0.1-0.3 parts of aqueous stripping agent, 0.1-0.5 parts of aqueous defoaming agent, and 8-12 parts of silica matting powder; And / or, in step S25, the weight ratio of the aqueous semi-finished matte polycarbonate printing resin to the aqueous bright polycarbonate printing resin is 3-4.5:7-10.

5.

7. The environmentally friendly water-based polycarbonate printing resin slurry according to claim 2, characterized in that: The water-based polycarbon printing resin includes a water-based bright polycarbon printing resin and a water-based matte polycarbon printing resin, and the preparation method thereof is: mixing the water-based bright polycarbon printing resin and the water-based matte polycarbon printing resin in a weight ratio of 1-8:1-4.

8. A method for preparing the environmentally friendly water-based polycarbonate printing resin slurry as claimed in any one of claims 1 to 7, characterized in that: The water-based polycarbonate printing resin and the water-based color paste are put into a mixer in proportion and the rotation speed is controlled at 500-800 r / min for stirring; then the cross-linking curing agent is put into the mixer in proportion and the rotation speed is controlled at 800-1000 r / min for stirring. When the viscosity reaches 2500±500 CPS / 25°C, the stirring is stopped to obtain an environmentally friendly water-based polycarbonate printing resin slurry.

9. Use of the environmentally friendly water-based polycarbonate printing resin slurry as claimed in any one of claims 1 to 7 in printing on the surface of synthetic leather.

10. The use according to claim 9, characterized in that: It includes the following steps: The environmentally friendly water-based polycarbonate printing resin slurry is transferred to the surface of the synthetic leather through a printing wheel, and different patterns are printed after being shaped in an oven; the oven temperature is 155±5°C.

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