Preparation method of matte resin and matte resin

Abstract

The invention discloses a preparation method of matte resin and the matte resin, and belongs to the technical field of high polymer materials, the method comprises the following steps: stirring waterborne polyurethane resin, optimized ABS rubber powder, ABS-g-MAH resin and AS resin in a high-speed stirrer according to a formula for preliminary mixing; adding the compatilizer according to the formula, and continuously stirring and uniformly mixing; adding polystearyl methacrylate (PSM), fluoroalkyl silicone oil, a nano reinforcing agent, a weather-proof agent and an antioxidant, and continuously stirring and uniformly mixing; and raising the temperature of the system, heating and stirring, and cooling to room temperature for later use. Through the synergistic effect of the prepared new optimized ABS rubber powder, the polystearyl methacrylate (PSM) and the fluoroalkyl silicone oil, the matt effect and the film strength of the obtained matt resin are remarkably improved at the same time.

Description

Technical Field

[0001] The invention belongs to the technical field of polymer materials, and in particular relates to a preparation method of a matte resin and the matte resin. Background Art

[0002] Matt resin, as a special coating material, has been increasingly used in the fields of home furnishing, automobiles, and electrical appliances in recent years. Its unique semi-matte or full matte gloss effect not only enhances the texture of the product, but also injects new vitality into modern design. The emergence of polyimide (PA) and acrylonitrile-butadiene-styrene (ABS) alloy materials has opened up a new world for the application of matte resin. PA / ABS alloy material combines the wear resistance, chemical corrosion resistance, and thermal stability of PA with the dimensional stability and low-temperature impact resistance of ABS. This combination makes PA / ABS alloy a composite material with excellent performance. The combination of matte resin and this alloy complements each other. On the basis of maintaining the original excellent properties of the alloy, matte resin gives it a more unique appearance.

[0003] In the home furnishing field, the combination of matte resin and PA / ABS alloy makes the surface of furniture not only have excellent wear resistance and corrosion resistance, but also present a low-key and luxurious gloss effect. Whether it is the matte treatment of wood grain materials or the coating of other materials, the furniture can glow with a unique brilliance, adding elegance and taste to the home environment. In the automotive field, the application of PA / ABS alloy and matte resin is even more brilliant. Automotive interior materials need to have good wear resistance, corrosion resistance, impact resistance and other properties, while also considering aesthetics and comfort. The combination of PA / ABS alloy and matte resin just meets these requirements. The application of matte resin makes the surface of automotive interior present a unique matte effect, which not only improves the texture of the whole vehicle, but also brings a more comfortable visual experience to the driver and passengers. At the same time, the excellent performance of alloy materials also ensures the durability and safety of automotive interiors. In addition, the combination of matte resin and PA / ABS alloy also makes the material have good shock absorption and sound absorption performance. This feature is particularly important in the application of automotive interiors. Both the engine vibration and road noise can be effectively alleviated, providing the driver and passengers with a quieter and more comfortable riding environment.

[0004] However, despite the many advantages brought by this combination, there are still some defects and technical difficulties in practical applications. First, although the PA / ABS alloy material itself has excellent wear resistance and corrosion resistance, performance degradation may occur in the process of combining with matte resin. This is mainly because the interfacial bonding force of the two materials is not strong enough, which leads to problems such as delamination and cracking during use, especially in harsh environments such as high humidity and high temperature. Secondly, the preparation process of matte resin is relatively complicated, and the reaction conditions need to be precisely controlled to ensure the quality and performance of the product. However, in the process of combining PA / ABS alloy material with matte resin, how to ensure that the two can be evenly mixed and do not affect the matte effect of matte resin is a technical problem. In addition, it is also necessary to pay attention to controlling the generation of bubbles during the preparation process to avoid affecting the appearance and performance of the product. Furthermore, although the PA / ABS alloy material has good dimensional stability, after combining with matte resin, due to the mismatch of the expansion coefficient between the two, the product may be deformed, warped and other problems during long-term use. In addition, with the increasing awareness of environmental protection, higher requirements are also put forward for the environmental protection performance of matte resin. However, some of the PA / ABS alloy materials and matte resin combination products on the market still need to be improved in terms of environmental performance, such as the emission of volatile organic compounds (VOCs), which still need to be resolved. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a method for preparing a matte resin and a matte resin, and the specific scheme is as follows:

[0006] A method for preparing a matte resin comprises the following steps:

[0007] (1) Preliminary mixing of waterborne polyurethane resin, optimized ABS rubber powder, ABS-g-MAH resin and AS resin in a high-speed stirrer according to the formula;

[0008] (2) Add the compatibilizer according to the formula and continue stirring to mix evenly;

[0009] (3) adding polystearyl methacrylate (PSM), fluoroalkyl silicone oil, nano-enhancer, weathering agent and antioxidant, and continuously stirring and mixing;

[0010] (4) Raise the temperature of the system, heat and stir, and cool to room temperature for later use.

[0011] Preferably, the stirring process in steps (1), (2) and (3) is controlled at a temperature of 50-60°C.

[0012] Preferably, the heating and stirring in step (4) is performed at a temperature of 80-90° C. and a stirring time of 20-30 min.

[0013] The present invention also provides a matte resin prepared by the preparation method, comprising the following components: waterborne polyurethane resin, optimized ABS rubber powder, ABS-g-MAH resin, AS resin with high acrylonitrile content, a new compatibilizer, a nano-enhancer, an environmentally friendly antioxidant, and a high-efficiency weathering agent.

[0014] Preferably, the matte resin components include, by mass:

[0015] Waterborne polyurethane resin: 40-60 parts,

[0016] Optimized ABS rubber powder: 20-40 parts,

[0017] ABS-g-MAH resin: 15-25 parts,

[0018] AS resin: 10-20 parts,

[0019] Polystearyl methacrylate (PSM): 1-3 parts

[0020] Fluoroalkyl silicone oil: 0.5-2 parts,

[0021] Compatibilizer: 2-6 parts,

[0022] Nano-enhancer: 2-4 parts,

[0023] Antioxidant: 0.1-0.3 parts,

[0024] Weathering agent: 0.1-0.3 parts;

[0025] Wherein, the acrylonitrile content in the AS resin is 35-44wt%.

[0026] Preferably, the compatibilizer includes one or both of maleic anhydride grafted polyolefin and styrene-maleic anhydride copolymer.

[0027] Preferably, the nano-enhancer includes one or both of nano-calcium carbonate and nano-silicon dioxide.

[0028] Preferably, the antioxidant includes one or both of antioxidant 1035 or antioxidant RIANOX 1035.

[0029] Preferably, the weathering agent includes one or both of Tinuvin 770 and Uvinul T-150.

[0030] Preferably, the method for preparing the optimized ABS rubber powder comprises the following steps:

[0031] S1. Mix styrene, acrylonitrile and butadiene in a certain proportion as an oil phase; mix an emulsifier, water and a buffer as a water phase;

[0032] S2. Under high-speed stirring, gradually add the oil phase into the water phase to form a stable emulsion;

[0033] S3, adding an initiator to the emulsion obtained in S2, heating to carry out polymerization reaction, and after the reaction is completed, demulsification and separation are carried out to obtain optimized ABS rubber powder.

[0034] Preferably, the mass ratio of styrene, acrylonitrile and butadiene in S1 is (40-60):(15-35):(9-25).

[0035] Preferably, the emulsifier is sodium dodecyl sulfate, the initiator is benzoyl peroxide, the regulator is benzoyl peroxide, the buffer is sodium bicarbonate, and the antioxidant is an antioxidant.

[0036] Preferably, the mass ratio of the emulsifier, water and buffer in S1 is (0.5-5):(0.1-1):(5-30).

[0037] Preferably, the emulsification in S2 is carried out at room temperature to 40°C.

[0038] Preferably, the polymerization reaction in S3 is carried out at a temperature of 60-90° C. and for a time of 3-7 hours.

[0039] Preferably, the demulsification in S3 is specifically to add 1 g / L NaCl aqueous solution to the reaction system under stirring conditions, and stop adding after the demulsification process is completed.

[0040] When the emulsion shows obvious stratification and the upper oil phase and the lower water phase are clearly separated, it is judged that the demulsification process has been completed.

[0041] Preferably, the separation in S3 includes washing with deionized water followed by centrifugation and drying.

[0042] Beneficial Effects

[0043] The present invention prepares a new optimized ABS rubber powder and the synergistic effect of polystearyl methacrylate (PSM) and fluoroalkyl silicone oil, and significantly improves the matte effect and film strength of the obtained matte resin. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0045] Unless otherwise defined, all professional and scientific terms used herein have the same meanings as those familiar to those skilled in the art. In addition, any methods and materials similar or equivalent to those described herein may be applied to the present invention. The preferred implementation methods and materials described herein are for demonstration purposes only and are not intended to limit the content of this application.

[0046] The experimental methods in the following examples are conventional methods unless otherwise specified, and the experimental materials used in the following examples are purchased from commercial channels unless otherwise specified.

[0047] Preparation Example Preparation of optimized ABS rubber powder:

[0048] S1. Mix styrene, acrylonitrile and butadiene in a certain proportion as an oil phase; mix an emulsifier, water and a buffer as a water phase;

[0049] S2. Under high-speed stirring, gradually add the oil phase into the water phase to form a stable emulsion;

[0050] S3, adding an initiator to the emulsion obtained in S2, heating to carry out polymerization reaction, and after the reaction is completed, demulsification and separation are carried out to obtain optimized ABS rubber powder.

[0051] The mass ratio of styrene, acrylonitrile and butadiene in S1 is 40:35:25.

[0052] The emulsifier is sodium lauryl sulfate, the initiator is benzoyl peroxide, the regulator is benzoyl peroxide, the buffer is sodium bicarbonate, and the antioxidant is an antioxidant.

[0053] The mass ratio of the emulsifier, water and buffer described in S1 is 2:1:10.

[0054] The emulsification in S2 is carried out at room temperature to 40°C.

[0055] The polymerization reaction in S3 was carried out at a temperature of 70° C. and for a period of 4 h.

[0056] The demulsification in S3 is specifically to add 1 g / L NaCl aqueous solution to the reaction system under stirring conditions, and stop adding after the demulsification process is completed.

[0057] When the emulsion shows obvious stratification and the upper oil phase and the lower water phase are clearly separated, it is judged that the demulsification process has been completed.

[0058] The separation in S3 includes washing with deionized water, centrifuging and drying.

[0059] Embodiment 1 A matte resin:

[0060] formula:

[0061] Waterborne polyurethane resin: 40 parts,

[0062] Optimized ABS rubber powder: 20 parts,

[0063] ABS-g-MAH resin: 15 parts,

[0064] AS resin: 10 parts,

[0065] Polystearyl methacrylate (PSM): 1 part

[0066] Fluoroalkyl silicone oil: 0.5 parts,

[0067] Compatibilizer: 2 parts,

[0068] Nano-enhancer: 2 parts,

[0069] Antioxidant: 0.1 parts,

[0070] Weathering agent: 0.1 part;

[0071] Wherein, the acrylonitrile content in the AS resin is 35-44wt%.

[0072] The compatibilizer is maleic anhydride grafted polyolefin.

[0073] The nano-enhancer is nano-calcium carbonate.

[0074] The antioxidant is antioxidant 1035.

[0075] The weathering agent is Tinuvin 770.

[0076] Preparation method:

[0077] (1) Preliminary mixing of waterborne polyurethane resin, optimized ABS rubber powder, ABS-g-MAH resin and AS resin in a high-speed stirrer according to the formula;

[0078] (2) Add the compatibilizer according to the formula and continue stirring to mix evenly;

[0079] (3) adding polystearyl methacrylate (PSM), fluoroalkyl silicone oil, nano-enhancer, weathering agent and antioxidant, and continuously stirring and mixing;

[0080] (4) Raise the temperature of the system, heat and stir, and cool to room temperature for later use.

[0081] The stirring process in steps (1), (2) and (3) is controlled at a temperature of 50°C.

[0082] The heating and stirring in step (4) is performed at a temperature of 800° C. and a stirring time of 20 min.

[0083] Embodiment 2 A matte resin:

[0084] formula:

[0085] Waterborne polyurethane resin: 60 parts,

[0086] Optimized ABS rubber powder: 40 parts,

[0087] ABS-g-MAH resin: 25 parts,

[0088] AS resin: 20 parts,

[0089] Polystearyl methacrylate (PSM): 3 parts

[0090] Fluoroalkyl silicone oil: 2 parts,

[0091] Compatibilizer: 6 parts,

[0092] Nano-enhancer: 4 parts,

[0093] Antioxidant: 0.3 parts,

[0094] Weathering agent: 0.3 parts;

[0095] Wherein, the acrylonitrile content in the AS resin is 35-44wt%.

[0096] The compatibilizer is maleic anhydride grafted polyolefin.

[0097] The nano-enhancer is nano-calcium carbonate.

[0098] The antioxidant is antioxidant 1035.

[0099] The weathering agent is Tinuvin 770.

[0100] Preparation method:

[0101] (1) Preliminary mixing of waterborne polyurethane resin, optimized ABS rubber powder, ABS-g-MAH resin and AS resin in a high-speed stirrer according to the formula;

[0102] (2) Add the compatibilizer according to the formula and continue stirring to mix evenly;

[0103] (3) adding polystearyl methacrylate (PSM), fluoroalkyl silicone oil, nano-enhancer, weathering agent and antioxidant, and continuously stirring and mixing;

[0104] (4) Raise the temperature of the system, heat and stir, and cool to room temperature for later use.

[0105] The stirring process in steps (1), (2) and (3) is controlled at a temperature of 50°C.

[0106] The heating and stirring in step (4) is performed at a temperature of 800° C. and a stirring time of 20 min.

[0107] Embodiment 3 A matte resin:

[0108] formula:

[0109] Waterborne polyurethane resin: 50 parts,

[0110] Optimized ABS rubber powder: 30 parts,

[0111] ABS-g-MAH resin: 20 parts,

[0112] AS resin: 15 parts,

[0113] Polystearyl methacrylate (PSM): 2 parts

[0114] Fluoroalkyl silicone oil: 1 part,

[0115] Compatibilizer: 4 parts,

[0116] Nano-enhancer: 3 parts,

[0117] Antioxidant: 0.2 parts,

[0118] Weathering agent: 0.2 parts;

[0119] Wherein, the acrylonitrile content in the AS resin is 35-44wt%.

[0120] The compatibilizer is maleic anhydride grafted polyolefin.

[0121] The nano-enhancer is nano-calcium carbonate.

[0122] The antioxidant is antioxidant 1035.

[0123] The weathering agent is Tinuvin 770.

[0124] Preparation method:

[0125] (1) Preliminary mixing of waterborne polyurethane resin, optimized ABS rubber powder, ABS-g-MAH resin and AS resin in a high-speed stirrer according to the formula;

[0126] (2) Add the compatibilizer according to the formula and continue stirring to mix evenly;

[0127] (3) adding polystearyl methacrylate (PSM), fluoroalkyl silicone oil, nano-enhancer, weathering agent and antioxidant, and continuously stirring and mixing;

[0128] (4) Raise the temperature of the system, heat and stir, and cool to room temperature for later use.

[0129] The stirring process in steps (1), (2) and (3) is controlled at a temperature of 50°C.

[0130] The heating and stirring in step (4) is performed at a temperature of 800° C. and a stirring time of 20 min.

[0131] Comparative Example 1 A matte resin (using ordinary ABS rubber powder):

[0132] formula:

[0133] Waterborne polyurethane resin: 50 parts,

[0134] ABS rubber powder: 30 parts,

[0135] ABS-g-MAH resin: 20 parts,

[0136] AS resin: 15 parts,

[0137] Polystearyl methacrylate (PSM): 2 parts

[0138] Fluoroalkyl silicone oil: 1 part,

[0139] Compatibilizer: 4 parts,

[0140] Nano-enhancer: 3 parts,

[0141] Antioxidant: 0.2 parts,

[0142] Weathering agent: 0.2 parts;

[0143] Wherein, the acrylonitrile content in the AS resin is 35-44wt%.

[0144] The compatibilizer is maleic anhydride grafted polyolefin.

[0145] The nano-enhancer is nano-calcium carbonate.

[0146] The antioxidant is antioxidant 1035.

[0147] The weathering agent is Tinuvin 770.

[0148] Preparation method:

[0149] (1) Preliminary mixing of waterborne polyurethane resin, ABS rubber powder, ABS-g-MAH resin and AS resin in a high-speed stirrer according to the formula;

[0150] (2) Add the compatibilizer according to the formula and continue stirring to mix evenly;

[0151] (3) adding polystearyl methacrylate (PSM), fluoroalkyl silicone oil, nano-enhancer, weathering agent and antioxidant, and continuously stirring and mixing;

[0152] (4) Raise the temperature of the system, heat and stir, and cool to room temperature for later use.

[0153] The stirring process in steps (1), (2) and (3) is controlled at a temperature of 50°C.

[0154] The heating and stirring in step (4) is performed at a temperature of 800° C. and a stirring time of 20 min.

[0155] Comparative Example 2: A matte resin (without PSM):

[0156] formula:

[0157] Waterborne polyurethane resin: 50 parts,

[0158] Optimized ABS rubber powder: 30 parts,

[0159] ABS-g-MAH resin: 20 parts,

[0160] AS resin: 15 parts,

[0161] Fluoroalkyl silicone oil: 1 part,

[0162] Compatibilizer: 4 parts,

[0163] Nano-enhancer: 3 parts,

[0164] Antioxidant: 0.2 parts,

[0165] Weathering agent: 0.2 parts;

[0166] Wherein, the acrylonitrile content in the AS resin is 35-44wt%.

[0167] The compatibilizer is maleic anhydride grafted polyolefin.

[0168] The nano-enhancer is nano-calcium carbonate.

[0169] The antioxidant is antioxidant 1035.

[0170] The weathering agent is Tinuvin 770.

[0171] Preparation method:

[0172] (1) Preliminary mixing of waterborne polyurethane resin, optimized ABS rubber powder, ABS-g-MAH resin and AS resin in a high-speed stirrer according to the formula;

[0173] (2) Add the compatibilizer according to the formula and continue stirring to mix evenly;

[0174] (3) adding fluoroalkyl silicone oil, nano-enhancer, weathering agent and antioxidant, and continuously stirring and mixing evenly;

[0175] (4) Raise the temperature of the system, heat and stir, and cool to room temperature for later use.

[0176] The stirring process in steps (1), (2) and (3) is controlled at a temperature of 50°C.

[0177] The heating and stirring in step (4) is performed at a temperature of 800° C. and a stirring time of 20 min.

[0178] Comparative Example 3 A matte resin (without adding fluoroalkyl silicone oil):

[0179] formula:

[0180] Waterborne polyurethane resin: 50 parts,

[0181] Optimized ABS rubber powder: 30 parts,

[0182] ABS-g-MAH resin: 20 parts,

[0183] AS resin: 15 parts,

[0184] Polystearyl methacrylate (PSM): 2 parts

[0185] Compatibilizer: 4 parts,

[0186] Nano-enhancer: 3 parts,

[0187] Antioxidant: 0.2 parts,

[0188] Weathering agent: 0.2 parts;

[0189] Wherein, the acrylonitrile content in the AS resin is 35-44wt%.

[0190] The compatibilizer is maleic anhydride grafted polyolefin.

[0191] The nano-enhancer is nano-calcium carbonate.

[0192] The antioxidant is antioxidant 1035.

[0193] The weathering agent is Tinuvin 770.

[0194] Preparation method:

[0195] (1) Preliminary mixing of waterborne polyurethane resin, optimized ABS rubber powder, ABS-g-MAH resin and AS resin in a high-speed stirrer according to the formula;

[0196] (2) Add the compatibilizer according to the formula and continue stirring to mix evenly;

[0197] (3) adding polystearyl methacrylate (PSM), nano-enhancer, weathering agent and antioxidant, and continuously stirring and mixing;

[0198] (4) Raise the temperature of the system, heat and stir, and cool to room temperature for later use.

[0199] The stirring process in steps (1), (2) and (3) is controlled at a temperature of 50°C.

[0200] The heating and stirring in step (4) is performed at a temperature of 800° C. and a stirring time of 20 min.

[0201] Comparative Example 4: A matte resin (without PSM and fluoroalkyl silicone oil):

[0202] formula:

[0203] Waterborne polyurethane resin: 50 parts,

[0204] Optimized ABS rubber powder: 30 parts,

[0205] ABS-g-MAH resin: 20 parts,

[0206] AS resin: 15 parts,

[0207] Compatibilizer: 4 parts,

[0208] Nano-enhancer: 3 parts,

[0209] Antioxidant: 0.2 parts,

[0210] Weathering agent: 0.2 parts;

[0211] Wherein, the acrylonitrile content in the AS resin is 35-44wt%.

[0212] The compatibilizer is maleic anhydride grafted polyolefin.

[0213] The nano-enhancer is nano-calcium carbonate.

[0214] The antioxidant is antioxidant 1035.

[0215] The weathering agent is Tinuvin 770.

[0216] Preparation method:

[0217] (1) Preliminary mixing of waterborne polyurethane resin, optimized ABS rubber powder, ABS-g-MAH resin and AS resin in a high-speed stirrer according to the formula;

[0218] (2) Add the compatibilizer according to the formula and continue stirring to mix evenly;

[0219] (3) adding nano-enhancer, weathering agent and antioxidant, and continuously stirring and mixing;

[0220] (4) Raise the temperature of the system, heat and stir, and cool to room temperature for later use.

[0221] The stirring process in steps (1), (2) and (3) is controlled at a temperature of 50°C.

[0222] The heating and stirring in step (4) is performed at a temperature of 800° C. and a stirring time of 20 min.

[0223] Comparative Example 5: A matte resin (using ordinary ABS without adding fluoroalkyl silicone oil):

[0224] formula:

[0225] Waterborne polyurethane resin: 50 parts,

[0226] ABS rubber powder: 30 parts,

[0227] ABS-g-MAH resin: 20 parts,

[0228] AS resin: 15 parts,

[0229] Polystearyl methacrylate (PSM): 2 parts

[0230] Compatibilizer: 4 parts,

[0231] Nano-enhancer: 3 parts,

[0232] Antioxidant: 0.2 parts,

[0233] Weathering agent: 0.2 parts;

[0234] Wherein, the acrylonitrile content in the AS resin is 35-44wt%.

[0235] The compatibilizer is maleic anhydride grafted polyolefin.

[0236] The nano-enhancer is nano-calcium carbonate.

[0237] The antioxidant is antioxidant 1035.

[0238] The weathering agent is Tinuvin 770.

[0239] Preparation method:

[0240] (1) Preliminary mixing of waterborne polyurethane resin, ABS rubber powder, ABS-g-MAH resin and AS resin in a high-speed stirrer according to the formula;

[0241] (2) Add the compatibilizer according to the formula and continue stirring to mix evenly;

[0242] (3) adding polystearyl methacrylate (PSM), nano-enhancer, weathering agent and antioxidant, and continuously stirring and mixing;

[0243] (4) Raise the temperature of the system, heat and stir, and cool to room temperature for later use.

[0244] The stirring process in steps (1), (2) and (3) is controlled at a temperature of 50°C.

[0245] The heating and stirring in step (4) is performed at a temperature of 800° C. and a stirring time of 20 min.

[0246] Comparative Example 6: A matte resin (using ordinary ABS without adding PSM):

[0247] formula:

[0248] Waterborne polyurethane resin: 50 parts,

[0249] ABS rubber powder: 30 parts,

[0250] ABS-g-MAH resin: 20 parts,

[0251] AS resin: 15 parts,

[0252] Fluoroalkyl silicone oil: 1 part,

[0253] Compatibilizer: 4 parts,

[0254] Nano-enhancer: 3 parts,

[0255] Antioxidant: 0.2 parts,

[0256] Weathering agent: 0.2 parts;

[0257] Wherein, the acrylonitrile content in the AS resin is 35-44wt%.

[0258] The compatibilizer is maleic anhydride grafted polyolefin.

[0259] The nano-enhancer is nano-calcium carbonate.

[0260] The antioxidant is antioxidant 1035.

[0261] The weathering agent is Tinuvin 770.

[0262] Preparation method:

[0263] (1) Preliminary mixing of waterborne polyurethane resin, ABS rubber powder, ABS-g-MAH resin and AS resin in a high-speed stirrer according to the formula;

[0264] (2) Add the compatibilizer according to the formula and continue stirring to mix evenly;

[0265] (3) adding fluoroalkyl silicone oil, nano-enhancer, weathering agent and antioxidant, and continuously stirring and mixing evenly;

[0266] (4) Raise the temperature of the system, heat and stir, and cool to room temperature for later use.

[0267] The stirring process in steps (1), (2) and (3) is controlled at a temperature of 50°C.

[0268] The heating and stirring in step (4) is performed at a temperature of 800° C. and a stirring time of 20 min.

[0269] Performance testing:

[0270] 1 wt% of hexamethylene diisocyanate (HDI) was added to the samples prepared in all the above examples and comparative examples, and after mixing, test specimens were prepared under the same injection molding conditions, specifically the injection molding temperature was 160-200°C, the injection molding pressure was 50-80MPa, and the injection molding speed was 30-50mm / s. The obtained specimens had the same size and a smooth surface, and the following tests were performed:

[0271] Tensile strength: Tensile strength was measured according to ASTM D 178;

[0272] Impact strength: Notched impact strength was measured according to ASTM D256 (1 / 8″ notch, 23°C);

[0273] Gloss: According to ASTM D, the gloss at 20°, 60° and 85° angles was measured.

[0274] The obtained data are shown in Table 1.

[0275] 1. A matte resin (using ordinary ABS rubber powder)

[0276] 2. A matte resin (without PSM)

[0277] 3 types of matte resins (without fluoroalkyl silicone oil)

[0278] 4. A matte resin (without PSM and fluoroalkyl silicone oil)

[0279] 5. A matte resin (using ordinary ABS, fluoroalkyl silicone oil)

[0280] 6 types of matte resin (using ordinary ABS, without adding PSM)

[0281] Table 1 Parameters obtained from the test of the embodiments and comparative examples

[0282]

[0283]

[0284] It can be seen from the parameters obtained from the embodiments and comparative examples that the optimized ABS rubber powder provided by the present invention works synergistically with PSM and fluoroalkyl silicone oil to simultaneously improve the physical strength, mechanical parameters and matte effect of the matte resin.

[0285] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0286] The present invention and its implementation methods are described above, which is not restrictive. What is shown is only one of the implementation methods of the present invention, and the actual application is not limited thereto. In short, if ordinary technicians in the field are inspired by it and design methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention, they should all fall within the protection scope of the present invention.

Claims

1. A method for preparing a matte resin, characterized in that: The following steps are involved: (1) Preliminary mixing of waterborne polyurethane resin, optimized ABS rubber powder, ABS-g-MAH resin and AS resin in a high-speed stirrer according to the formula; (2) Add the compatibilizer according to the formula and continue stirring to mix evenly; (3) adding polystearyl methacrylate (PSM), fluoroalkyl silicone oil, nano-enhancer, weathering agent and antioxidant, and continuously stirring and mixing; (4) Raise the temperature of the system, heat and stir, and cool to room temperature for later use.

2. The method for preparing a matte resin according to claim 1, characterized in that: The stirring process in steps (1), (2) and (3) is controlled at a temperature of 50-60°C.

3. The method for preparing a matte resin according to claim 1, characterized in that: The heating and stirring in step (4) is performed at a temperature of 80-90° C. and a stirring time of 20-30 min.

4. The matte resin prepared according to the preparation method according to any one of claims 1 to 3, characterized in that: It includes the following components: water-based polyurethane resin, optimized ABS rubber powder, ABS-g-MAH resin, AS resin with high acrylonitrile content, new compatibilizer, nano-reinforcement agent, environmentally friendly antioxidant, and high-efficiency weathering agent.

5. The matte resin according to claim 4, characterized in that: The matte resin components include, by mass: Waterborne polyurethane resin: 40-60 parts, Optimized ABS rubber powder: 20-40 parts, ABS-g-MAH resin: 15-25 parts, AS resin: 10-20 parts, Polystearyl methacrylate (PSM): 1-3 parts Fluoroalkyl silicone oil: 0.5-2 parts, Compatibilizer: 2-6 parts, Nano-enhancer: 2-4 parts, Antioxidant: 0.1-0.3 parts, Weathering agent: 0.1-0.3 parts; Wherein, the acrylonitrile content in the AS resin is 35-44wt%.

6. The matte resin according to claim 4, characterized in that: The compatibilizer includes one or both of maleic anhydride grafted polyolefin or styrene-maleic anhydride copolymer; the nano-enhancer includes one or both of nano-calcium carbonate or nano-silicon dioxide; the antioxidant includes one or both of antioxidant 1035 or antioxidant RIANOX 1035; the weathering agent includes one or both of Tinuvin 770 or Uvinul T-150.

7. The matte resin according to claim 4, characterized in that: The preparation method of the optimized ABS rubber powder comprises the following steps: S1. Mix styrene, acrylonitrile and butadiene in a certain proportion as an oil phase; mix an emulsifier, water and a buffer as a water phase; S2. Under high-speed stirring, gradually add the oil phase into the water phase to form a stable emulsion; S3, adding an initiator to the emulsion obtained in S2, heating to carry out polymerization reaction, and after the reaction is completed, demulsification and separation are carried out to obtain optimized ABS rubber powder.

8. The matte resin according to claim 4, characterized in that: The mass ratio of styrene, acrylonitrile and butadiene in S1 is (40-60):(15-35):(9-25); the mass ratio of emulsifier, water and buffer in S1 is (0.5-5):(0.1-1):(5-30).

9. The matte resin according to claim 4, characterized in that: The emulsification in S2 is carried out at room temperature to 40°C.

10. The matte resin according to claim 4, characterized in that: The polymerization reaction in S3 is carried out at a temperature of 60-90° C. for 3-7 hours. The demulsification in S3 is specifically carried out by adding 1 g / L NaCl aqueous solution to the reaction system under stirring conditions, and stopping the addition after the demulsification process is completed.

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