Light-colored, high heat-resistant PVC artificial leather for vehicles and its preparation method

Abstract

The present invention discloses a light-colored and highly heat-resistant automotive PVC artificial leather and its preparation method. The PVC artificial leather includes a water-based surface coating, a PVC surface layer, a PVC foaming layer, a PVC paste layer, and a base fabric layer arranged in sequence. Among them, the PVC surface layer contains the following raw materials in parts by weight: 100 parts of PVC powder, 5-10 parts of filler, 80-90 parts of plasticizer, 3-5 parts of calcium-zinc stabilizer, 1-10 parts of heat-resistant agent, 0.1-1 part of heat-resistant auxiliary agent, and 5-10 parts of pigment; the heat-resistant auxiliary agent is a mixture of polyhexamethylene biguanide hydrochloride and sodium rosin alcohol polyoxyethylene ether succinate sulfonate in a ratio of 1:0.5-1.5; the water-based surface coating includes a first water-based surface coating and a second water-based surface coating, and the second water-based surface coating is located between the first water-based surface coating and the PVC surface layer. The present invention improves the heat aging performance of the PVC artificial leather and extends the service life of the PVC artificial leather.

Description

Technical Field

[0001] The present invention relates to the technical field of PVC artificial leather, and particularly to a light-colored high-heat-resistant automotive PVC artificial leather and a preparation method thereof. Background Art

[0002] PVC artificial leather is to sequentially coat PVC functional layers with different formulations on a base fabric (such as knitted fabric, non-woven fabric, etc.), and at the same time, printing treatment can be carried out on the outer surface of the coating according to needs. However, for the existing automotive PVC artificial leather, due to insufficient heat resistance, its appearance will change due to heat, thereby affecting the aesthetics and service life. Therefore, it is urgent to develop a new PVC artificial leather to improve its heat aging performance. Summary of the Invention

[0003] Based on the technical problems existing in the background art, the present invention proposes a light-colored high-heat-resistant automotive PVC artificial leather and a preparation method thereof, which improve the heat aging performance of the PVC artificial leather and extend the service life of the PVC artificial leather.

[0004] The light-colored high-heat-resistant automotive PVC artificial leather proposed by the present invention includes a water-based surface coating, a PVC surface layer, a PVC foam layer, a PVC paste layer, and a base fabric layer arranged in sequence, wherein the PVC surface layer contains the following raw materials in parts by weight:

[0005]

[0006] Preferably, the heat-resistant agent is polyamic acid, and the relative molecular weight of the polyamic acid is (2 - 4)×10 5 .

[0007] Preferably, the heat-resistant auxiliary agent is a mixture of polyhexamethylene biguanide hydrochloride and sodium rosin alcohol polyoxyethylene ether sulfosuccinate in a ratio of 1:0.5 - 1.5.

[0008] Preferably, the water-based surface coating includes a first water-based surface coating and a second water-based surface coating, and the second water-based surface coating is located between the first water-based surface coating and the PVC surface layer.

[0009] Preferably, the first water-based surface coating contains the following raw materials in parts by weight:

[0010]

[0011] Preferably, the second water-based surface coating contains the following raw materials in parts by weight:

[0012]

[0013] Preferably, the PVC foam layer contains the following raw materials in parts by weight:

[0014]

[0015] Preferably, the PVC paste layer comprises raw materials in the following parts by weight:

[0016]

[0017] The preparation method of the above-mentioned light-colored high-heat-resistant automotive PVC artificial leather proposed by the present invention is as follows:

[0018] S1: Preparation of slurries of the aqueous surface coating, PVC surface layer, PVC foam layer and PVC paste layer;

[0019] S2: Coating the slurry of the PVC surface layer on the release paper and performing a drying treatment;

[0020] S3: Coating the PVC foam layer on the side of the PVC surface layer away from the release paper after the drying treatment and performing a drying treatment;

[0021] S4: Coating the PVC paste layer on the side of the PVC foam layer away from the PVC surface layer after the drying treatment, and then laminating a base fabric on the side of the PVC paste layer away from the PVC foam layer and performing a drying treatment;

[0022] S5: Peeling off the release paper, coating an aqueous surface coating on the side of the PVC surface layer away from the PVC foam layer, and embossing the outer surface of the aqueous surface coating to obtain the light-colored high-heat-resistant automotive PVC artificial leather.

[0023] Preferably, the drying temperature in S2-S4 is 150-200 °C.

[0024] The beneficial technical effects of the present invention:

[0025] By adding a heat-resistant agent and a heat-resistant auxiliary agent to the PVC surface layer, the present invention significantly improves the heat aging performance of the prepared PVC artificial leather. The heat-resistant agent of the present application is polyamic acid, and its relative molecular weight is further defined to make the improvement effect of polyamic acid on the heat resistance of PVC artificial leather the best. The heat-resistant auxiliary agent is composed of polyhexamethylene biguanide hydrochloride and sodium monolauryl polyoxyethylene ether sulfosuccinate, which can further promote the improvement of the heat aging performance of PVC artificial leather by polyamic acid, and polyhexamethylene biguanide hydrochloride and sodium monolauryl polyoxyethylene ether sulfosuccinate also have a certain synergistic promotion effect on promoting the improvement of the heat aging performance of PVC artificial leather by polyamic acid. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of the light-colored high-heat-resistant automotive PVC artificial leather proposed by the present invention.

[0027] In the figure: 1 - First aqueous surface coating, 2 - Second aqueous surface coating, 3 - PVC surface layer, 4 - PVC foaming layer, 5 - PVC paste layer, 6 - Base fabric layer. Detailed implementation manners

[0028] For each embodiment of the present invention, PVC powder, filler, and pigment are all commercially available; the plasticizer is selected as bis(2-propylheptyl) phthalate; the calcium-zinc stabilizer is a powder calcium-zinc stabilizer, MARKòCZ 2039 produced by Galata Chemical Company, and the main components are zeolite (30 - 60%), sodium perchlorate (15%), calcium silicate (10 - 30%), and zinc stearate (1 - 10%); the model of the aqueous self-extinguishing polycarbonate resin is WF-3649; the model of the aqueous polyurethane resin is RU-13-085; the model of the defoaming agent is DF-2459; the model of the leveling agent is LA-91-120; the model of the crosslinking agent is XR-5580; the flame retardant is antimony trioxide; the blowing agent is azodicarbonamide.

[0029] Example 1

[0030] The light-colored high-heat-resistant automotive PVC artificial leather proposed by the present invention includes, in sequence, an aqueous surface coating, a PVC surface layer, a PVC foaming layer, a PVC paste layer, and a base fabric layer, where:

[0031] The PVC surface layer contains the following raw materials by weight: 100 parts of PVC powder, 8 parts of filler, 85 parts of plasticizer, 4 parts of calcium-zinc stabilizer, 5 parts of heat-resistant agent, 0.5 part of heat-resistant auxiliary agent, and 8 parts of pigment.

[0032] The heat-resistant agent is polyamic acid, and the relative molecular weight of polyamic acid is 3×10 5 .

[0033] The heat-resistant auxiliary agent is a mixture of polyhexamethylene biguanide hydrochloride and sodium rosin alcohol polyoxyethylene ether sulfosuccinate in a ratio of 1:1.

[0034] The aqueous surface coating includes a first aqueous surface coating and a second aqueous surface coating, and the second aqueous surface coating is located between the first aqueous surface coating and the PVC surface layer.

[0035] The first aqueous surface coating contains the following raw materials by weight: 75 parts of aqueous self-extinguishing polycarbonate resin, 25 parts of aqueous polyurethane resin, 0.4 part of defoaming agent, 1 part of leveling agent, and 5 parts of crosslinking agent.

[0036] The second aqueous surface coating contains the following raw materials by weight: 100 parts of aqueous self-extinguishing polycarbonate resin, 0.4 part of defoaming agent, 1 part of leveling agent, and 5 parts of crosslinking agent.

[0037] The PVC foaming layer contains the following raw materials by weight: 100 parts of PVC powder, 85 parts of plasticizer, 3 parts of calcium-zinc stabilizer, 12 parts of flame retardant, 2 parts of foaming agent, and 6 parts of coloring agent.

[0038] The PVC paste layer contains the following raw materials by weight: 100 parts of PVC powder, 65 parts of plasticizer, 3 parts of PVC stabilizer, and 9 parts of flame retardant.

[0039] The preparation method of the above-mentioned light-colored high-heat-resistant automotive PVC artificial leather proposed by the present invention is as follows:

[0040] S1: Preparation of slurries of the water-based surface coating, PVC surface layer, PVC foaming layer, and PVC paste layer;

[0041] S2: Coating the slurry of the PVC surface layer on the release paper and drying it;

[0042] S3: Coating the PVC foaming layer on the side of the dried PVC surface layer away from the release paper and drying it;

[0043] S4: Coating the PVC paste layer on the side of the dried PVC foaming layer away from the PVC surface layer, then laminating the base fabric on the side of the PVC paste layer away from the PVC foaming layer and drying it;

[0044] S5: Peeling off the release paper, coating the water-based surface coating on the side of the PVC surface layer away from the PVC foaming layer, and embossing the outer surface of the water-based surface coating to obtain the light-colored high-heat-resistant automotive PVC artificial leather.

[0045] The drying temperature in S2 - S4 is 170 °C.

[0046] Example 2

[0047] The light-colored high-heat-resistant automotive PVC artificial leather proposed by the present invention includes a water-based surface coating, a PVC surface layer, a PVC foaming layer, a PVC paste layer, and a base fabric layer arranged in sequence, wherein:

[0048] The PVC surface layer contains the following raw materials by weight: 100 parts of PVC powder, 5 parts of filler, 80 parts of plasticizer, 3 parts of calcium-zinc stabilizer, 1 part of heat-resistant agent, 0.1 part of heat-resistant auxiliary agent, and 5 parts of pigment.

[0049] The heat-resistant agent is polyamic acid, and the relative molecular weight of polyamic acid is 2×10 5 .

[0050] The heat-resistant auxiliary agent is a mixture of polyhexamethylene biguanide hydrochloride and sodium rosin alcohol polyoxyethylene ether succinate sulfonate in a ratio of 2:1.

[0051] The water-based surface coating includes a first water-based surface coating and a second water-based surface coating, and the second water-based surface coating is located between the first water-based surface coating and the PVC surface layer.

[0052] The first water-based surface coating contains the following raw materials by weight: 75 parts of water-based self-extinguishing polycarbonate resin, 20 parts of water-based polyurethane resin, 0.3 part of defoaming agent, 0.5 part of leveling agent, and 1 part of cross-linking agent.

[0053] The second water-based surface coating contains the following raw materials by weight: 100 parts of water-based self-extinguishing polycarbonate resin, 0.3 part of defoaming agent, 0.5 part of leveling agent, and 1 part of cross-linking agent.

[0054] The PVC foaming layer contains the following raw materials by weight: 100 parts of PVC powder, 80 parts of plasticizer, 2 parts of calcium-zinc stabilizer, 10 parts of flame retardant, 1 part of foaming agent, and 5 parts of colorant.

[0055] The PVC paste layer contains the following raw materials by weight: 100 parts of PVC powder, 55 parts of plasticizer, 2 parts of PVC stabilizer, and 8 parts of flame retardant.

[0056] The preparation method of the above-mentioned light-colored high-heat-resistant automotive PVC artificial leather proposed by the present invention is as follows:

[0057] S1: Preparation of the slurries of the water-based surface coating, PVC surface layer, PVC foaming layer, and PVC paste layer;

[0058] S2: Coating the slurry of the PVC surface layer on the release paper and performing a drying treatment;

[0059] S3: Coating the PVC foaming layer on the side of the PVC surface layer away from the release paper after the drying treatment and performing a drying treatment;

[0060] S4: Coating the PVC paste layer on the side of the PVC foaming layer away from the PVC surface layer after the drying treatment, and then laminating the base fabric on the side of the PVC paste layer away from the PVC foaming layer and performing a drying treatment;

[0061] S5: Peeling off the release paper, coating the water-based surface coating on the side of the PVC surface layer away from the PVC foaming layer, and embossing the outer surface of the water-based surface coating to obtain the light-colored high-heat-resistant automotive PVC artificial leather.

[0062] The drying temperature in S2-S4 is 160 °C.

[0063] Example 3

[0064] The light-colored high-heat-resistant automotive PVC artificial leather proposed by the present invention includes a water-based surface coating, a PVC surface layer, a PVC foaming layer, a PVC paste layer, and a base fabric layer arranged in sequence, wherein:

[0065] The PVC surface layer contains raw materials in the following parts by weight: 100 parts of PVC powder, 10 parts of filler, 90 parts of plasticizer, 5 parts of calcium-zinc stabilizer, 10 parts of heat-resistant agent, 1 part of heat-resistant auxiliary agent, and 10 parts of pigment.

[0066] The heat-resistant agent is polyamic acid, and the relative molecular weight of polyamic acid is 4×10 5 。

[0067] The heat-resistant auxiliary agent is a mixture of polyhexamethylene biguanide hydrochloride and sodium rosin alcohol polyoxyethylene ether succinate monoestersulfonate in a ratio of 1:2.

[0068] The water-based surface coating includes a first water-based surface coating and a second water-based surface coating, and the second water-based surface coating is located between the first water-based surface coating and the PVC surface layer.

[0069] The first water-based surface coating contains raw materials in the following parts by weight: 75 parts of water-based self-extinguishing polycarbonate resin, 30 parts of water-based polyurethane resin, 0.5 part of defoaming agent, 1.5 parts of leveling agent, and 10 parts of cross-linking agent.

[0070] The second water-based surface coating contains raw materials in the following parts by weight: 100 parts of water-based self-extinguishing polycarbonate resin, 0.5 part of defoaming agent, 1.5 parts of leveling agent, and 10 parts of cross-linking agent.

[0071] The PVC foaming layer contains raw materials in the following parts by weight: 100 parts of PVC powder, 90 parts of plasticizer, 4 parts of calcium-zinc stabilizer, 15 parts of flame retardant, 3 parts of foaming agent, and 8 parts of colorant.

[0072] The PVC paste layer contains raw materials in the following parts by weight: 100 parts of PVC powder, 75 parts of plasticizer, 4 parts of PVC stabilizer, and 10 parts of flame retardant.

[0073] The preparation method of the above-mentioned light-colored and high-heat-resistant automotive PVC artificial leather proposed by the present invention is as follows:

[0074] S1: Preparation of the slurries of the water-based surface coating, PVC surface layer, PVC foaming layer, and PVC paste layer;

[0075] S2: Coating the slurry of the PVC surface layer on the release paper and performing a drying treatment;

[0076] S3: Coating the PVC foaming layer on the side of the dried PVC surface layer away from the release paper and performing a drying treatment;

[0077] S4: Coating the PVC paste layer on the side of the dried PVC foaming layer away from the PVC surface layer, then laminating the base fabric on the side of the PVC paste layer away from the PVC foaming layer and performing a drying treatment;

[0078] S5: Peel off the release paper, coat a water-based surface coating on the side of the PVC surface layer away from the PVC foaming layer, and emboss the outer surface of the water-based surface coating to obtain a light-colored, highly heat-resistant automotive PVC artificial leather.

[0079] The drying temperature in S2 - S4 is 180 °C.

[0080] Comparative Example 1

[0081] The relative molecular weight of the heat-resistant agent polyamic acid in this solution is 8×10 4 ; The remaining conditions are the same as those in Example 1.

[0082] Comparative Example 2

[0083] The relative molecular weight of the heat-resistant agent polyamic acid in this solution is 6×10 5 ; The remaining conditions are the same as those in Example 1.

[0084] Comparative Example 3

[0085] The PVC surface layer in this solution contains the following raw materials by weight: 100.5 parts of PVC powder, 8 parts of filler, 85 parts of plasticizer, 4 parts of calcium-zinc stabilizer, 5 parts of heat-resistant agent, and 8 parts of pigment; The remaining conditions are the same as those in Example 1.

[0086] Comparative Example 4

[0087] The heat-resistant auxiliary agent in this solution is polyhexamethylene biguanide hydrochloride; The remaining conditions are the same as those in Example 1.

[0088] Comparative Example 5

[0089] The heat-resistant auxiliary agent in this solution is sodium rosin alcohol polyoxyethylene ether sulfosuccinate; The remaining conditions are the same as those in Example 1.

[0090] Use the "Test Methods for Automotive Genuine Leather, Polyurethane Leather and Polyvinyl Chloride Coated Fabrics of M0602_2020-N" to test the heat aging performance of the PVC artificial leather prepared in Examples 1 - 3 and Comparative Examples 1 - 5. The results are shown in Table 1.

[0091] Table 1 Heat Aging Performance Test

[0092]

[0093] As can be seen from the test results in Table 1, the heat-resistant agent of the present application is polyamic acid, and its relative molecular weight is further defined to make the improvement effect of polyamic acid on the heat resistance of PVC artificial leather the best. The heat-resistant auxiliary agent is composed of polyhexamethylene biguanide hydrochloride and sodium monolauryl polyoxyethylene ether sulfosuccinate, which can further promote the improvement of the heat aging performance of polyamic acid on PVC artificial leather, and polyhexamethylene biguanide hydrochloride and sodium monolauryl polyoxyethylene ether sulfosuccinate also have a certain synergistic promotion effect on promoting the improvement of the heat aging performance of polyamic acid on PVC artificial leather.

[0094] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. Light-colored, high heat-resistant PVC artificial leather for vehicles, characterized in that, It includes a water-based surface coating, a PVC surface layer, a PVC foaming layer, a PVC paste layer and a base fabric layer which are arranged in sequence. The PVC surface layer contains raw materials in the following parts by weight: The heat-resistant agent is polyamic acid, and the relative molecular weight of the polyamic acid is 2×10 5 -4×10 5 ; The heat-resistant auxiliary agent is a mixture of polyhexamethylene biguanide hydrochloride and sodium rosin alcohol polyoxyethylene ether succinate sulfonate in a ratio of 1:0.5 - 1.

5.

2. The light-colored high heat-resistant automotive PVC artificial leather according to claim 1, characterized in that The water-based surface coating includes a first water-based surface coating and a second water-based surface coating. The second water-based surface coating is located between the first water-based surface coating and the PVC surface layer.

3. The light-colored high heat-resistant automotive PVC artificial leather according to claim 2, characterized in that, The first water-based surface coating contains raw materials in the following parts by weight:

4. The light-colored high heat-resistant automotive PVC artificial leather according to claim 2, characterized in that, The second water-based surface coating contains raw materials in the following parts by weight:

5. The light-colored, high heat-resistant automotive PVC artificial leather according to claim 1, characterized in that, The PVC foaming layer contains raw materials in the following parts by weight:

6. The light-colored high heat-resistant automotive PVC artificial leather according to claim 1, characterized in that The PVC paste layer contains raw materials in the following parts by weight:

7. The preparation method of the light-colored high heat-resistant automotive PVC artificial leather according to any one of claims 1-6, characterized in that, The method steps are as follows: S1: Preparation of the slurries of the water-based surface coating, the PVC surface layer, the PVC foaming layer and the PVC paste layer; S2: Coating the slurry of the PVC surface layer on the release paper and performing a drying treatment; S3: Coating the PVC foaming layer on the side of the dried PVC surface layer away from the release paper and performing a drying treatment; S4: Coating the PVC paste layer on the side of the dried PVC foaming layer away from the PVC surface layer, then laminating the base fabric on the side of the PVC paste layer away from the PVC foaming layer and performing a drying treatment; S5: Peeling off the release paper, coating the water-based surface coating on the side of the PVC surface layer away from the PVC foaming layer, and embossing the outer surface of the water-based surface coating to obtain the light-colored high-heat-resistant automotive PVC artificial leather.

8. The preparation method of the light-colored and high heat-resistant automotive PVC artificial leather according to claim 7, characterized in that, The drying temperature in S2 - S4 is 150 - 200 °C.

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