PVC (polyvinyl chloride) artificial leather surface coating agent with lasting silencing function, application of PVC artificial leather surface coating agent, preparation method of automotive trim PVC artificial leather and automotive trim PVC artificial leather

Abstract

The invention discloses a lasting silencing PVC artificial leather surface coating agent and application thereof, a preparation method of automotive trim PVC artificial leather and the automotive trim PVC artificial leather. The hydroxyl silicone oil emulsion is added into the PVC artificial leather surface coating agent, and the cross-linking agent is added in the process of treating a PVC base material by adopting the surface coating agent, so that hydroxyl groups in the hydroxyl silicone oil emulsion are subjected to cross-linking reaction, an organic silicon component is firmly locked in a water-based aliphatic polyurethane resin coating, and the PVC artificial leather surface coating agent is not easy to fall off and good in wear resistance; and the silencing performance is more durable.

Description

Technical Field

[0001] The invention relates to the technical field of PVC artificial leather, in particular to a durable sound-absorbing PVC artificial leather surface finishing agent and application thereof, a preparation method of automobile interior PVC artificial leather and automobile interior PVC artificial leather. Background Art

[0002] PVC artificial leather for automotive interiors will produce friction noise during use. The friction noise is mainly caused by the stick-slip effect caused by the contact friction between adjacent parts. It is actually manifested as an excessively high stick-slip effect when the artificial leather surface slides relative to each other. The way to solve the abnormal noise is usually to mute the surface of the artificial leather to reduce the stick-slip effect. The traditional method is to add a large amount of silicone feel agent during the surface treatment of the artificial leather to reduce the surface friction coefficient, thereby achieving the effect of mute. However, the accumulation of a large amount of silicone feel agent on the surface of the artificial leather will cause an obvious writing effect on the surface of the artificial leather, and there will be obvious marks when the finger is scratched on the surface of the artificial leather. In addition, the compatibility between the silicone feel agent and the base resin is poor. After simple mixing, the silicone feel agent often stays on the coating surface during the film formation process. During long-term use, the silicone feel agent is easy to fall off from the surface coating, and the mute ability decreases rapidly.

[0003] In addition, the prior art CN117659854A discloses an artificial leather silencing water-based treatment agent, which uses a small amount of silicone-modified water-based resin. During the film-forming process, the silicone component is enriched on the film-forming surface, and has a good silencing effect in the silencing test. However, the amount of silicone-modified resin added in the artificial leather silencing water-based treatment agent is small, the silencing effect is limited, and it does not have a lasting silencing performance.

[0004] The sound-absorbing performance of PVC artificial leather is not long-lasting, which greatly affects the use experience of drivers and passengers. Therefore, it is necessary to develop a PVC artificial leather for automobile interior with long-lasting sound-absorbing performance to solve the above problem. Summary of the invention

[0005] The invention provides a durable sound-absorbing PVC artificial leather surface finishing agent for solving the above problems and application thereof, a preparation method of automobile interior PVC artificial leather and automobile interior PVC artificial leather.

[0006] The purpose of the present invention is achieved by the following technical solutions:

[0007] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention includes:

[0008] The first aspect of the present invention is to provide a durable sound-absorbing PVC artificial leather surface finishing agent, which comprises the following components by mass percentage: 30-40% of water-based aliphatic polyurethane matte resin, 20-30% of water-based aliphatic polyurethane glossy resin, 20-30% of water, 6-20% of hydroxy silicone oil emulsion, 1-2% of wear-resistant additive, 1-2% of wetting agent, 0.5-1% of leveling agent, 1-2% of thickener and 0.1-0.3% of defoaming agent.

[0009] The second aspect of the present invention provides a method for preparing the durable sound-absorbing PVC artificial leather surface finishing agent described in the first aspect of the present invention, comprising the following steps: weighing each raw material according to the mass ratio, mixing and stirring the water-based aliphatic polyurethane matte resin, water-based aliphatic polyurethane glossy resin, hydroxy silicone oil emulsion, defoaming agent, leveling agent, wetting agent, and wear-resistant additive, adding water, continuing to stir, then adding a thickener, stirring evenly, and filtering.

[0010] The third aspect of the present invention provides an application of a durable sound-absorbing PVC artificial leather surface finishing agent in durable sound-absorbing PVC artificial leather for automobile interior decoration.

[0011] The fourth aspect of the present invention is to provide a method for preparing durable sound-absorbing PVC artificial leather for automobile interior, comprising the following steps:

[0012] 1) preparing the surface finishing agent by the method described in the second aspect of the present invention;

[0013] 2) adding a crosslinking agent to the surface finishing agent of step 1) and stirring evenly;

[0014] 3) The sample obtained in step 2) is coated onto a PVC substrate using a gravure printing technique, dried, and then embossed.

[0015] In one embodiment, the crosslinking agent is isocyanate, and the amount of the crosslinking agent added is 2-8 wt %.

[0016] In one embodiment, the drying is performed at 100-120° C. for 2-5 min.

[0017] The fifth aspect of the present invention is to provide a durable sound-absorbing PVC artificial leather for automobile interior, wherein the durable sound-absorbing PVC artificial leather for automobile interior is prepared by the preparation method described in the fourth aspect of the present invention.

[0018] In the present invention, unless otherwise specified, the raw materials used can be purchased from the market or are commonly used in the art.

[0019] Compared with the prior art, the beneficial effects of the present invention include at least:

[0020] (1) Hydroxy silicone oil emulsion is an emulsion composed of silicone oil modified with hydroxyl groups. It is miscible with water and exists stably in the form of an emulsion. The hydroxyl groups in the hydroxy silicone oil emulsion are hydrophilic, which makes the hydroxy silicone oil in the surface finishing agent have good compatibility with the water-based aliphatic polyurethane resin and has a good film-forming effect.

[0021] (2) When treating the PVC substrate with a surface finishing agent, a cross-linking agent is added to cause the hydroxyl groups in the hydroxyl silicone oil emulsion to undergo a cross-linking reaction, thereby firmly locking the silicone component in the water-based aliphatic polyurethane resin coating, making it less likely to fall off, having good wear resistance, and more lasting sound-absorbing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The invention discloses a method for preparing the automotive interior PVC artificial leather according to an embodiment of the present invention. DETAILED DESCRIPTION

[0023] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete and to fully convey the concepts of example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0024] The words expressing positions and directions described in the present invention are all explained with reference to the accompanying drawings as examples, but they can be changed as needed, and all such changes are included in the protection scope of the present invention.

[0025] Embodiment 1:

[0026] Weigh all raw materials according to the mass ratio, mix and stir 30% of water-based aliphatic polyurethane matte resin, 20% of water-based aliphatic polyurethane glossy resin, 6% of hydroxy silicone oil emulsion, 0.1% of defoamer, 0.5% of leveling agent, 1% of wetting agent and 1% of wear-resistant additive, add water, continue to stir, then add 1% of thickener, stir evenly, and filter; add 4% of isocyanate cross-linking agent, stir evenly; use gravure printing technology to apply the surface finishing agent to the PVC artificial leather base layer, dry at 120°C for 2 minutes, and then emboss.

[0027] Embodiment 2:

[0028] Weigh all raw materials according to the mass ratio, mix and stir 30% of water-based aliphatic polyurethane matte resin, 20% of water-based aliphatic polyurethane glossy resin, 12% of hydroxy silicone oil emulsion, 0.1% of defoamer, 0.5% of leveling agent, 1% of wetting agent and 1% of wear-resistant additive, add water, continue to stir, then add 2% of thickener, stir evenly, and filter; add 6% of isocyanate cross-linking agent, stir evenly; use gravure printing technology to apply the surface finishing agent to the PVC artificial leather base layer, dry at 120°C for 2 minutes, and then emboss.

[0029] Embodiment 3:

[0030] Weigh all raw materials according to the mass ratio, mix and stir 40% of water-based aliphatic polyurethane matte resin, 30% of water-based aliphatic polyurethane glossy resin, 20% of hydroxy silicone oil emulsion, 0.2% of defoamer, 1% of leveling agent, 2% of wetting agent and 2% of wear-resistant additive, add water, continue to stir, then add 2% of thickener, stir evenly, and filter; add 8% of isocyanate cross-linking agent, stir evenly; use gravure printing technology to apply the surface finishing agent to the PVC artificial leather base layer, dry at 120°C for 2 minutes, and then emboss.

[0031] Water-based aliphatic polyurethane matte resin 30-40%, water-based aliphatic polyurethane glossy resin 20-30%, water 20-30%, hydroxy silicone oil emulsion 6-20%, wear-resistant additive 1-2%, wetting agent 1-2%, leveling agent 0.5-1%, thickener 1-2%, defoaming agent 0.1-0.3%.

[0032] Comparative Example 1:

[0033] Weigh all raw materials according to the mass ratio, mix and stir 30% of water-based aliphatic polyurethane matte resin, 20% of water-based aliphatic polyurethane glossy resin, 12% of hydroxy silicone oil emulsion, 0.1% of defoamer, 0.5% of leveling agent, 1% of wetting agent and 1% of wear-resistant additive, add water, continue to stir, then add 2% of thickener, stir evenly and filter; use gravure printing technology to apply the surface finishing agent to the PVC artificial leather base layer, dry at 120°C for 2 minutes, and then emboss.

[0034] The PVC artificial leather prepared above was subjected to a sound attenuation test and a Martindale abrasion color fastness test:

[0035] Noise reduction performance test: The noise reduction performance test of the material is carried out on the SSP-04 noise reduction tester of the German Ziegler Instruments GmbH in accordance with the VDA230-206 standard. Two pieces of 20mm×25mm and 27mm×50mm are cut respectively. After being stored at room temperature for 8 hours, the stick-slip coefficient is tested at a pressure of 10N and 40N, and the moving speed is 1mm / min and 4mm / min respectively. The system will calculate the RPN value of the risk factor for abnormal noise based on the test results of the stick-slip coefficient. The smaller the RPN value, the lower the risk of friction noise caused by the material in contact with other surfaces.

[0036] Martindale abrasion color fastness test: Martindale abrasion color fastness test is carried out according to the test standard of VDA230-211 (method A). A circular sample with a diameter of 160 mm is fixed on the circular base of the equipment, and a grinding cloth (specification: STFIMD100) is fixed on the wear-resistant head. After the sample is worn 100,000 times under a pressure load of 12 KPa, the appearance of the wear state is observed visually under a 50x microscope. If there is no observable damage to the material, it is qualified, otherwise it is unqualified and the damage state is described.

[0037] The test results are shown in the following table:

[0038]

[0039]

[0040] The test data of Examples 1-3 and Comparative Example 1 show that adding hydroxy silicone oil emulsion to the surface finishing agent can make the PVC artificial leather achieve the effect of silencing. In addition, in the process of treating the PVC artificial leather substrate with the surface finishing agent, an isocyanate crosslinking agent is added to cause the hydroxyl groups in the hydroxy silicone oil emulsion to undergo a crosslinking reaction, thereby firmly locking the organic silicon component in the water-based aliphatic polyurethane resin coating, making it difficult to fall off, having good wear resistance, and more durable silencing performance.

[0041] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, substitute and modify the above embodiments within the scope of the invention without departing from the principles and purpose of the present invention. All such changes should fall within the scope of protection of the claims of the present invention.

Claims

1. A durable sound-absorbing PVC artificial leather surface finishing agent, characterized in that: The surface finishing agent comprises the following components by mass percentage: 30-40% of water-based aliphatic polyurethane matte resin, 20-30% of water-based aliphatic polyurethane glossy resin, 20-30% of water, 6-20% of hydroxy silicone oil emulsion, 1-2% of wear-resistant additive, 1-2% of wetting agent, 0.5-1% of leveling agent, 1-2% of thickener and 0.1-0.3% of defoaming agent.

2. Application of the durable sound-absorbing PVC artificial leather surface finishing agent according to claim 1 in automobile interior decoration.

3. A method for preparing PVC artificial leather for automobile interior, characterized in that: The steps include: 1) preparing the surface finishing agent according to claim 1; 2) adding a crosslinking agent to the surface finishing agent of step 1) and stirring evenly; 3) The sample obtained in step 2) is coated onto a PVC substrate using a gravure printing technique, dried, and then embossed.

4. The preparation method according to claim 3, characterized in that: The preparation process of the surface finishing agent in the above step 1) is as follows: weigh the raw materials according to the mass ratio, mix and stir the water-based aliphatic polyurethane matte resin, water-based aliphatic polyurethane gloss resin, hydroxy silicone oil emulsion, defoamer, leveling agent, wetting agent, and wear-resistant additive, add water, continue stirring, then add the thickener, stir evenly, and filter.

5. The preparation method according to claim 3, characterized in that: The cross-linking agent is isocyanate, and the addition amount of the cross-linking agent is 2-8 wt %.

6. The preparation method according to claim 3, characterized in that: The drying is carried out at 100-120° C. for 2-5 minutes.

7. An automobile interior PVC artificial leather prepared by the method according to any one of claims 3 to 6.

Images