A silicone leather bonded polyurethane sponge article and a method of making the same

Abstract

The application provides a silicone leather-adhered polyurethane sponge product and a preparation method thereof, and belongs to the technical field of composite material products. The composite material comprises, from top to bottom, a release film layer, a hand feeling layer, a silicone leather layer and a polyurethane sponge layer. The silicone leather-adhered polyurethane sponge product is creatively prepared by using the preparation method, and the problems of the existing PVC leather-adhered polyurethane sponge product and PU leather-adhered polyurethane sponge product, such as odor / VOC exceeding the standard, easy aging, yellowing and falling, and difficult cleaning and maintenance, are effectively solved. The problems of the real leather (cow leather, sheep leather and pig leather) -adhered polyurethane sponge product, such as small quantity and high price, are effectively solved, and a brand-new option is provided for the automobile interior industry.

Description

Technical Field

[0001] This invention belongs to the field of composite material products technology, and relates to a silicone leather laminated polyurethane foam product and its preparation method. Background Technology

[0002] With the increasing number of cars on the road and the growing demand for enhanced passenger comfort, the automotive industry chain is placing increasingly higher demands on interior materials. Issues such as odor / VOC levels, yellowing / peeling due to aging, and ease of cleaning and maintenance are becoming key concerns for automakers and the industry chain. Mainstream automotive interior materials using PVC leather laminated with polyurethane foam and PU leather laminated with polyurethane foam are increasingly criticized by consumers for issues such as excessive odor / VOC levels, susceptibility to yellowing and peeling due to aging, and difficulty in cleaning and maintenance. Therefore, the development of leather-laminated foam products that are low in odor and VOCs, resistant to yellowing and peeling, easy to clean and maintain, and cheaper than genuine leather (cowhide, sheepskin, pigskin) laminated with polyurethane foam products has become a pressing need for consumers and industry enterprises.

[0003] Silicon-based polymer materials (organosilicon), due to their unique molecular structure, possess superior properties compared to carbon-based polymer materials, such as low surface energy (less prone to adsorption and adhesion of other substances, easier to clean and maintain), resistance to high and low temperatures, UV resistance, resistance to heat and oxygen aging, flame retardancy, and low emission (low odor and low VOC). Since 2020, with the booming development of the organosilicon industry, silicone leather (silicone single leather + base fabric / flannel / microfiber fabric) has gradually entered the vision of ordinary consumers. Like other silicone-based polymer materials, silicone leather has advantages such as low odor / VOC, resistance to aging, yellowing and peeling, and easy cleaning and maintenance, which has made it increasingly popular among consumers. It is now used in the back cover packaging of 3C electronic products and the upholstery of high-end furniture.

[0004] With the development of the automotive industry, consumers are increasingly concerned about issues such as excessive odor / VOC levels, yellowing and peeling due to aging, and difficulty in cleaning and maintenance in mainstream automotive interior leather-bonded polyurethane foam products. Silicone leather materials, on the other hand, offer advantages such as low odor / VOC levels, resistance to yellowing and peeling, and ease of cleaning and maintenance. Therefore, replacing existing PVC and PU leather with polyurethane foam using silicone leather to create silicone leather-bonded polyurethane foam products for automotive interiors seems like a good solution. However, silicone materials have drawbacks such as low strength, low elongation at break, poor scratch resistance, and low peel strength when bonded to other materials. Overcoming these shortcomings and endowing silicone leather-bonded polyurethane foam products with superior physical properties and peel strength is crucial for the development of this new option in automotive interior leather-bonded polyurethane foam products. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by providing a silicone leather-laminated polyurethane foam product and its preparation method. The technical problem to be solved by this invention is to provide high-quality silicone leather-laminated polyurethane foam.

[0006] To address the shortcomings and deficiencies of existing technologies, this invention proposes the following design approach:

[0007] 1) In the preparation of the silicone skin, a mixture of vinyl MQ resin is added to components A and B to improve its strength. The vinyl groups of the vinyl MQ resin in the mixture undergo a hydrosilylation reaction with the silanol groups of the silanol-containing polysiloxane, bonding into the cross-linked network of the silicone skin's molecular structure. The unique molecular structure of the vinyl MQ resin imparts excellent strength to the silicone skin.

[0008] 2) In the preparation of the silicone skin, to improve the elongation at break of the silicone skin, a chain extender is added to components A and B. The chain extender, through the hydrosilylation reaction of the silanol groups at both ends of its molecular chain segments, bonds to the vinyl groups of the vinyl polysiloxane in the silicone skin molecular structure. The long, straight chain of the chain extender extends the length of the silicone skin molecular chain, increases the flexibility of the silicone skin molecular chain, and endows the silicone skin with excellent elongation at break.

[0009] 3) To improve the scratch resistance of the silicone skin during preparation, a hydrogen-containing resin (a mixture of silanol-containing polysiloxane and MQ resin with silanol groups) is added to components A and B. The MQ resin with silanol groups in the hydrogen-containing resin bonds to the vinyl polysiloxane through a hydrosilylation reaction, thus imparting excellent strength to the silicone skin through the unique molecular structure of the MQ resin with silanol groups.

[0010] 4) When bonding silicone leather and polyurethane foam to prepare products, in order to improve the peel strength of the products, polyurethane foam with high porosity (high air permeability) is selected. When the foam and silicone leather are compacted and flattened by calendering rollers or rollers, the uncured liquid silicone can penetrate into the foam pores of the foam. After curing, it forms a claw anchor structure similar to an expansion screw, which improves the peel strength of silicone leather bonded to polyurethane foam products.

[0011] Based on the above technical ideas, the present invention provides a silicone leather laminated polyurethane foam product and its preparation method. Based on the characteristics of silicone leather, the silicone leather laminated polyurethane foam product prepared by the present invention is very suitable for use as automotive interior trim.

[0012] One object of the present invention is to provide a silicone leather laminated polyurethane foam product, which has the following characteristics:

[0013] 1) It has the characteristics of low odor and low VOC, which can effectively meet consumers' needs for the odor comfort of automotive interior materials;

[0014] 2) The silicone leather layer has a delicate and comfortable feel, is scratch-resistant, and is resistant to high and low temperatures, ultraviolet rays, and heat and oxygen aging. The leather layer will not age, yellow, or peel off after long-term use.

[0015] 3) It has the characteristics of easy cleaning and maintenance. Common dirt such as oil stains, oil-based pen marks, and cosmetics can be wiped clean with a damp towel.

[0016] Another object of the present invention is to provide a method for preparing a silicone leather laminated polyurethane foam product.

[0017] According to one aspect of the present invention, a silicone leather-bonded polyurethane foam product is provided. The product comprises four layers, from top to bottom: a release film layer, a tactile layer, a silicone leather layer, and a polyurethane foam layer. The release film layer is a PET silicone-based release film with a thickness of 25–75 μm and a release force of 5–20 gf / inch. The tactile layer comprises three components: a surface treatment agent, a catalyst, and a diluent. The silicone leather layer has a thickness of 0.1–0.3 mm and comprises two components, A and B. The polyurethane foam is a polyester foam or polyether foam with a thickness of 2–10 mm and an air permeability of 150 L / m² / s to 1500 L / m² / s. This silicone leather-bonded polyurethane foam product possesses advantages such as a delicate and comfortable touch, scratch resistance, low odor, low VOC, no aging, yellowing, or peeling after prolonged use, and easy maintenance and cleaning, thus meeting the performance requirements of consumers for leather-bonded foam products used in automotive interiors.

[0018] Furthermore, in the silicone leather laminated polyurethane foam product, the tensile strength of the silicone leather layer is 500KPa to 1200KPa, and the elongation at break is 100% to 400%; in the silicone leather layer, the mixing mass ratio of component A to component B is 1:1.

[0019] Furthermore, in the silicone leather bonded polyurethane foam product, the surface treatment agent, catalyst, and diluent are all commercially available products. When used, the mass ratio of the surface treatment agent, diluent, and catalyst is 1:0.7-1.2:0.02-0.03.

[0020] Furthermore, in the silicone leather layer of the silicone leather-bonded polyurethane foam product, component A includes vinyl polysiloxane, base adhesive, vinyl MQ resin mixture, crosslinking agent, chain extender, hydrogen-containing resin, catalyst, and inhibitor; component B includes vinyl polysiloxane, base adhesive, vinyl MQ resin mixture, crosslinking agent, chain extender, and hydrogen-containing resin.

[0021] Furthermore, in components A and B of the silicone skin layer, the vinyl polysiloxane includes one or more of dual-terminated vinyl polysiloxane, dual-terminated side-chain vinyl polysiloxane, and dual-terminated methyl side-chain vinyl polysiloxane, preferably dual-terminated vinyl polysiloxane; in components A and B, the crosslinking agent includes one or more of polysiloxane with silanol side chains and dual-terminated silanol polysiloxane, preferably polysiloxane with silanol side chains.

[0022] Furthermore, in components A and B of the silicone skin, the viscosity of the vinyl polysiloxane is 10000 mPa·S / 25℃~165000 mPa·S / 25℃, the silanyl content of the crosslinking agent (containing silanyl polysiloxane) is 5 mmol / g~16 mmol / g, and the base adhesive is a commercially available product with a viscosity of 750000 mPa·S / 25℃~1200000 mPa·S / 25℃.

[0023] Furthermore, in components A and B of the silicone skin layer, the vinyl MQ resin mixture is a mixture of vinyl polysiloxane and vinyl-containing MQ resin; in components A and B, the hydrogen-containing resin is a mixture of silane-containing polysiloxane and silane-containing MQ resin.

[0024] Furthermore, in component A of the silica gel layer, the catalyst is one or more of a group VIII metal, an inorganic compound, or an organic complex; preferably, the catalyst is one or more of a platinum metal, an inorganic compound, or an organic complex; more preferably, the catalyst is an organic complex of platinum metal; most preferably, the catalyst is platinum(O)-1,3-diethylene-1,1,3,3-tetramethyldisiloxane, i.e., a Castells reagent; and the inhibitor is an alkynyl alcohol.

[0025] Furthermore, in the silicone skin layer, the proportions of components A and B, by mass, of vinyl polysiloxane, base adhesive, vinyl MQ resin mixture, crosslinking agent, chain extender, hydrogen-containing resin, catalyst, and inhibitor are: 30–44: 21–26: 12–16: 0.8–1.7: 19–34: 0.25–1.05: 0.45–0.55: 0.045–0.055; preferably, the proportions are as follows: For example: 33~41: 22~25: 12~15: 1.0~1.5: 23~30: 0.50~0.75: 0.48~0.52: 0.048~0.052; the optimal addition ratio is: 36~38: 23~24: 13.5~14: 1.20~1.35: 26~27: 0.6~0.65: 0.49~0.50: 0.049~0.050;

[0026] According to another aspect of the present invention, a method for preparing a silicone leather laminated polyurethane foam article is provided, comprising the following steps:

[0027] 1) Preparation of the tactile layer

[0028] Weigh the surface treatment agent, diluent and catalyst according to the ratio and disperse them in a high-speed disperser at 1000 RPM for 1 minute to obtain the hand feel oil; then, apply the obtained hand feel oil to the release film according to the designed thickness using an automatic coating machine or a manual coating device, and heat and cure it in a forced-air drying oven at 130℃~150℃ for 3 minutes to obtain the hand feel layer with the release film.

[0029] 2) Preparation of silicone skin

[0030] The A and B components of the silicone skin layer are prepared according to the specified ratio and dispersed by stirring at 1000 RPM for 3 minutes using a high-speed mixer. Then, the A and B components are weighed according to a 1:1 ratio and dispersed by stirring at 500 RPM for 2 minutes to obtain liquid silicone for the silicone skin layer. The liquid silicone is then coated onto the tactile layer with the release film to the designed thickness using an automatic coating machine or a manual coating device. Finally, it is placed in a forced-air drying oven at 130℃~150℃ for 2 minutes to cure, thus obtaining a silicone skin layer with a release film and a tactile layer. From top to bottom, the components are silicone skin layer, tactile layer, and release film.

[0031] 3) Lamination of polyurethane foam layer

[0032] The prepared silicone rubber layer is coated onto the silicone rubber layer using an automatic or manual coating machine with liquid silicone to the designed thickness. Then, the prepared polyurethane foam sheet is laid flat on the liquid silicone and compacted and flattened using a calender or roller. Finally, the resulting composite sheet is placed in a forced-air drying oven at 130℃~150℃ for 3 minutes to cure, thus obtaining a silicone rubber layer laminated with polyurethane foam and a release film. From top to bottom, the layers are: foam layer, silicone rubber layer, tactile layer, and release film (protective film). To use, simply peel off the release film.

[0033] 4) Leather embossing and protective film coating

[0034] Remove the release film from the silicone leather-bonded polyurethane foam product prepared in step 3. Then, press the silicone leather-bonded polyurethane foam product with the desired leather texture using an embossing machine to obtain the desired silicone leather-bonded polyurethane foam product. Subsequently, cover the upper part of the leather with the release film used in step 1), thus obtaining a silicone leather-bonded polyurethane foam product with a protective film. Remove the protective film before use.

[0035] According to the present invention, a silicone leather-laminated polyurethane foam product and its preparation method are provided. The silicone leather-laminated polyurethane foam product prepared using the method provided by the present invention has low odor and low VOC characteristics, effectively solving the problem of excessive odor / VOC in existing PVC leather-laminated polyurethane foam and PU leather-laminated polyurethane foam products. Simultaneously, the prepared silicone leather-laminated polyurethane foam product has the characteristics of not aging, yellowing, or peeling after long-term use, and is easy to maintain and clean, meeting the performance requirements of consumers for leather-laminated foam products for automotive interiors, and is very suitable for use as a leather-laminated polyurethane foam product for automotive interiors. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the multi-layer structure of a silicone leather laminated with polyurethane foam. Detailed Implementation

[0037] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0038] like Figure 1 As shown, the silicone leather laminated polyurethane foam product comprises four layers, from top to bottom: a release film layer, a tactile layer, a silicone leather layer, and a polyurethane foam layer. The release film layer is a PET silicone-based release film with a thickness of 25–75 μm; the tactile layer consists of three components: a surface treatment agent, a catalyst, and a diluent; the silicone leather layer has a thickness of 0.1–0.3 mm and includes components A and B; the polyurethane foam is polyester foam or polyether foam with a thickness of 2–10 mm.

[0039] The following are specific examples:

[0040] All the basic raw materials used in the following examples are commercially available products.

[0041] Example 1

[0042] The preparation of silicone leather laminated with polyurethane foam products includes the following steps:

[0043] 1) Preparation of the tactile layer

[0044] Weigh the surface treatment agent, diluent, and catalyst in a ratio of 1:1:0.02 and disperse them in a high-speed disperser at 1000 RPM for 1 minute to obtain the hand-feel oil. Then, apply the obtained hand-feel oil to a 50µm thick 10gf / inch to 15gf / inch PET release film using an automatic coating machine or a manual coating device according to the designed thickness. Place it in a forced-air drying oven at 130℃ to 150℃ and heat to cure for 3 minutes to obtain the hand-feel layer with the release film.

[0045] 2) Preparation of silicone skin

[0046] Weigh the following components in Component A according to the ratio of 36:23:13.5:1.25:26:0.6:0.49:0049: 150000 mPa·s / 25℃ viscosity vinyl polysiloxane (204-150000 from Jiande Juhe New Materials Co., Ltd.), 750000 mPa·s / 25℃ viscosity base adhesive (6345 base adhesive from Dongguan Chuanshi Electronic Technology Co., Ltd.), vinyl MQ resin mixture (VQM6 from Anbia Specialty Silicones (Nantong) Co., Ltd.), 16 mmol / g hydrogen-containing crosslinking agent (side-chain hydrogen-containing silicone oil H=1.6 from Jiande Juhe New Materials Co., Ltd.), chain extender (CE30 from Anbia Specialty Silicones (Nantong) Co., Ltd.), hydrogen-containing resin (MQH9 from Anbia Specialty Silicones (Nantong) Co., Ltd.), and catalyst (PT from Zhongshan Zijun Chemical Co., Ltd.). -5000), inhibitor (OS121 from Shenzhen Ousbang New Materials Co., Ltd.); weigh the following components in component B according to the ratio of 36:23:13.5:1.25:26:0.6: vinyl polysiloxane (204-150000 from Jiande Juhe New Materials Co., Ltd.), base adhesive (6345 base adhesive from Dongguan Chuanshi Electronic Technology Co., Ltd.), vinyl MQ resin mixture (VQM6 from Anbiya Specialty Silicones (Nantong) Co., Ltd.), crosslinking agent (H16 from Jiangxi Lanxing Xinghuo Silicones Co., Ltd.), chain extender (CE30 from Anbiya Specialty Silicones (Nantong) Co., Ltd.), and hydrogen-containing resin (MQH9 from Anbiya Specialty Silicones (Nantong) Co., Ltd.) with a hydrogen content of 16 mmol / g: 5000), inhibitor (OS121 from Shenzhen Ousbang New Materials Co., Ltd.); and disperse the following components in component B by stirring at 1000 RPM for 3 min to obtain the silicone skin layer. Then, components A and B are weighed according to a 1:1 ratio and stirred and dispersed at 500 RPM for 2 minutes to obtain liquid silicone for the silicone skin layer. The liquid silicone is then coated onto the tactile layer with release film to a designed thickness of 0.2 mm using an automatic coating machine or a manual coating device. Finally, it is placed in a forced-air drying oven at 130℃~150℃ for 2 minutes to heat and cure, thus obtaining a silicone skin layer with release film and tactile layer. From top to bottom, the layers are silicone skin layer, tactile layer, and release film.

[0047] 3) Lamination of polyurethane foam layer

[0048] Apply the prepared silicone skin layer from step 2) to the silicone skin layer using an automatic or manual coating machine with liquid silicone to a designed thickness of 25µm. Then, lay a 4mm thick polyurethane foam sheet with a breathability of 350L / m² / s flat on the liquid silicone, and compact and flatten it with a calender or roller. Finally, place the resulting composite sheet in a forced-air drying oven at 130℃~150℃ for 3 minutes to cure. This yields a silicone skin layer laminated with polyurethane foam and a release film. From top to bottom, the layers are: foam layer, silicone skin layer, tactile layer, and release film (protective film). To use, simply peel off the release film.

[0049] 4) Leather embossing and protective film coating

[0050] Remove the release film from the silicone leather-bonded polyurethane foam product prepared in step 3. Then, press the silicone leather-bonded polyurethane foam product with the desired leather texture using an embossing machine to obtain the desired silicone leather-bonded polyurethane foam product. Subsequently, cover the upper part of the leather with the release film used in step 1), thus obtaining a silicone leather-bonded polyurethane foam product with a protective film. Remove the protective film before use.

[0051] Example 2

[0052] The difference between Example 2 and Example 1 is that in step 2) the preparation of the silicone skin, the viscosity of the vinyl polysiloxane used in components A and B is 65000 mPa·S / 25℃ (204-50000 from Jiande Polymer New Materials Co., Ltd.), while the others are the same as in Example 1.

[0053] Example 3

[0054] The difference between Example 3 and Example 1 is that in step 2) the preparation of the silicone skin, the viscosity of the vinyl polysiloxane used in components A and B is 20000 mPa·S / 25℃ (204-20000 from Jiande Polymer New Materials Co., Ltd.), while the others are the same as in Example 1.

[0055] Example 4

[0056] The difference between Example 4 and Example 1 is that in step 2) the preparation of the silicone skin, the viscosity of the vinyl polysiloxane used in components A and B is 10000 mPa·S / 25℃ (204-10000 from Jiande Polymer New Materials Co., Ltd.), while the others are the same as in Example 1.

[0057] Example 5

[0058] The difference between Example 5 and Example 1 is that in step 2) the preparation of the silicone skin, the viscosity of the vinyl polysiloxane used in components A and B is 65000 mPa·S / 25℃ (204-50000 from Jiande Juhe New Materials Co., Ltd.), and the hydrogen content of the crosslinking agent is 10 mmol / g (side-chain hydrogen-containing silicone oil H=1.0 from Jiande Juhe New Materials Co., Ltd.). The rest is the same as in Example 1.

[0059] Example 6

[0060] The difference between Example 6 and Example 1 is that in step 2) the preparation of the silicone skin, the viscosity of the vinyl polysiloxane used in components A and B is 65000 mPa·S / 25℃ (204-50000 from Jiande Juhe New Materials Co., Ltd.), and the hydrogen content of the crosslinking agent is 5 mmol / g (side-chain hydrogen-containing silicone oil H=0.5 from Jiande Juhe New Materials Co., Ltd.). The rest is the same as in Example 1.

[0061] Comparative Example 1

[0062] The leather-bonded polyurethane foam product of Comparative Example 1 was obtained by bonding commercially available PVC single leather with polyurethane hot melt adhesive using the same polyurethane foam as in Examples 1-6.

[0063] Comparative Example 2

[0064] Comparative Example 2, a leather-bonded polyurethane foam product, was obtained by bonding commercially available PU single leather with polyurethane hot melt adhesive using the same polyurethane foam as in Examples 1-6.

[0065] The physical property test results of the leather-laminated polyurethane foam products prepared in Examples 1-6 and Comparative Examples 1 and 2 are shown in Table 1.

[0066] Table 1. Test results of physical properties of leather-laminated polyurethane foam products

[0067]

[0068]

[0069] As shown in Table 1, in the comparison of single leather (separate leather layers) without base fabric and without bonding operations, the silicone leather prepared in Examples 1 to 4 of Examples 1 to 6 has a tensile strength that is not worse than that of existing PVC leather and PU leather single leather. However, in terms of elongation at break, except for the silicone leather single leather prepared in Example 4, which is relatively poor, the tensile strength of the silicone leather single leather prepared in the other examples is better than that of PVC. Among them, the silicone leather single leather prepared in Examples 1 and 2 has the best comprehensive mechanical properties, with both tensile strength and elongation at break being better than those of PVC leather and PU leather single leather.

[0070] As shown in Table 1, the odor levels of the silicone leather-laminated polyurethane foam products prepared in Examples 1-6 are all lower than those of existing PVC leather-laminated polyurethane foam and PU leather-laminated polyurethane foam products. This is mainly due to the low emission of silicone leather and the odorless nature of the raw materials used to prepare the silicone leather. As shown in Table 1, the thermo-oxidative aging test results show that none of the silicone leather-laminated polyurethane foam products prepared in Examples 1-6 exhibited yellowing or peeling of the leather layer. In contrast, existing PVC leather-laminated polyurethane foam and PU leather-laminated polyurethane foam products all showed yellowing and peeling of the leather layer. This is mainly because silicone materials have excellent resistance to high and low temperatures and thermo-oxidative aging. As shown in Table 1, the ease of cleaning and maintenance test results show that the leather layer of the silicone leather-laminated polyurethane foam products prepared in Examples 1-6 is very easy to clean and maintain. In contrast, existing PVC leather-laminated polyurethane foam and PU leather-laminated polyurethane foam products are difficult to clean and maintain, requiring extreme care during normal use. This is mainly because silicone leather has extremely low surface energy, making it difficult for other substances to adhere to its surface, thus facilitating cleaning and maintenance.

[0071] As shown in Table 1, the scratch resistance of the silicone leather-laminated polyurethane foam products prepared under tests 1, 2, 3, 5, and 6 was no worse than that of the leather layers in existing PVC leather-laminated polyurethane foam and PU leather-laminated polyurethane foam products. This is mainly because the addition of hydrogen-containing resin during the preparation of the liquid silicone material for silicone leather improved the scratch resistance of the silicone leather. As shown in Table 1, the tactile feel of the silicone leather-laminated polyurethane foam products prepared under tests 1–6 was better than that of the leather layers in existing PVC leather-laminated polyurethane foam and PU leather-laminated polyurethane foam products.

[0072] In summary, the silicone leather-bonded polyurethane foam products prepared by the method provided by this invention have advantages over existing PVC leather-bonded polyurethane foam and PU leather-bonded polyurethane foam products, such as low odor, resistance to aging, yellowing and peeling, easy cleaning and maintenance, and delicate touch. They are very suitable as a new option for leather-bonded polyurethane foam products for automotive interiors and can replace genuine leather-bonded polyurethane foam products to a certain extent.

[0073] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A silicone leather-laminated polyurethane foam product, characterized in that, The silicone leather-laminated polyurethane foam product comprises four layers, from top to bottom: a release film layer, a hand-feel layer, a silicone leather layer, and a polyurethane foam layer. The release film layer is a PET silicone release film with a thickness of 25–75 μm and a release force of 5–20 gf / inch. The hand-feel layer is a mixture of a surface treatment agent, a catalyst, and a diluent. The silicone leather layer has a thickness of 0.1–0.3 mm. The polyurethane foam is polyester foam or polyether foam with a thickness of 2–10 mm and an air permeability of 150 L / m³. 2 / s~1500L / m 2 / s; The tensile strength of the silicone skin is 500 kPa to 1200 kPa, and the elongation at break is 100% to 400%. The surface treatment agent, catalyst, and diluent are all commercially available products. When using them, the ratio of surface treatment agent, diluent, and catalyst is 1:0.7-1.2:0.02-0.

03. The silicone skin consists of two components, A and B. The mixing ratio of component A and component B is 1:

1. Component A includes vinyl polysiloxane, base glue, vinyl MQ resin mixture, crosslinking agent, chain extender, hydrogen-containing resin, catalyst, and inhibitor. Component B includes vinyl polysiloxane, base glue, vinyl MQ resin mixture, crosslinking agent, chain extender, and hydrogen-containing resin.

2. The silicone leather-laminated polyurethane foam product according to claim 1, characterized in that, In components A and B, the vinyl polysiloxane includes one or more of the following: dual-terminated vinyl polysiloxane, dual-terminated side-chain vinyl polysiloxane, and dual-terminated methyl side-chain vinyl polysiloxane; in components A and B, the crosslinking agent includes one or more of the following: polysiloxane with silanol side chains and polysiloxane with silanol double ends.

3. A silicone leather-laminated polyurethane foam product according to claim 1, characterized in that, In components A and B, the viscosity of the vinyl polysiloxane is 10000 mPa·S / 25℃~165000 mPa·S / 25℃, the crosslinking agent is a crosslinking agent containing silanol polysiloxane, and the silanol content in the crosslinking agent is 5 mmol / g~16 mmol / g. The base adhesive is a commercially available product with a viscosity of 750000 mPa·S / 25℃~1200000 mPa·S / 25℃.

4. A silicone leather-laminated polyurethane foam product according to claim 1, characterized in that, In components A and B, the vinyl MQ resin mixture is a mixture of vinyl polysiloxane and vinyl-containing MQ resin; in components A and B, the hydrogen-containing resin is a mixture of silane-containing polysiloxane and silane-containing MQ resin.

5. A silicone leather-laminated polyurethane foam product according to claim 1, characterized in that, In component A, the catalyst is one or more of a group VIII metal, an inorganic compound, or an organic complex; the inhibitor is an alkynyl alcohol.

6. A silicone leather-laminated polyurethane foam product according to claim 1, characterized in that, The catalyst is platinum(0)-1,3-diethylene-1,1,3,3-tetramethyldisiloxane, i.e., Castells reagent.

7. A silicone leather-laminated polyurethane foam product according to claim 1, characterized in that, In components A and B, the addition ratios of vinyl polysiloxane, base glue, vinyl MQ resin mixture, crosslinking agent, chain extender, hydrogen-containing resin, catalyst, and inhibitor are: 30–44: 21–26: 12–16: 0.8–1.7: 19–34: 0.25–1.05: 0.45–0.55: 0.045–0.

055.

8. A silicone leather-laminated polyurethane foam product according to claim 7, characterized in that, In components A and B, the addition ratios of vinyl polysiloxane, base adhesive, vinyl MQ resin mixture, crosslinking agent, chain extender, hydrogen-containing resin, catalyst, and inhibitor are: 36–38: 23–24: 13.5–14: 1.20–1.35: 26–27: 0.6–0.65: 0.49–0.50: 0.049–0.

050.

9. A method for preparing a silicone leather-laminated polyurethane foam article as described in any one of claims 1 to 8, characterized in that, Includes the following steps: 1) Preparation of the tactile layer Weigh the surface treatment agent, diluent and catalyst according to the ratio and disperse them in a high-speed disperser at 1000 RPM for 1 minute to obtain the hand feel oil; then, apply the obtained hand feel oil to the release film according to the designed thickness using an automatic coating machine or a manual coating device, and heat and cure it in a forced-air drying oven at 130℃~150℃ for 3 minutes to obtain the hand feel layer with the release film. 2) Preparation of silicone skin The A and B components of the silicone skin layer are prepared according to the ratio and dispersed by stirring at 1000 RPM for 3 minutes using a high-speed mixer. Then, the A and B components are weighed according to a 1:1 ratio and dispersed by stirring at 500 RPM for 2 minutes to obtain liquid silicone for the silicone skin layer. The liquid silicone is then coated onto the tactile layer with release film according to the designed thickness using an automatic coating machine or a manual coating device. Finally, it is placed in a forced-air drying oven at 130℃~150℃ and heated and cured for 2 minutes to obtain a silicone skin layer with release film and tactile layer. From top to bottom, the components are silicone skin layer, tactile layer, and release film. 3) Lamination of polyurethane foam layer The prepared silicone skin layer is coated onto the silicone skin layer using an automatic or manual coating machine with liquid silicone to the designed thickness. Then, the prepared polyurethane sponge sheet is laid flat on the liquid silicone and compacted and flattened with calendering rollers or rollers. Finally, the resulting composite sheet is placed in a forced-air drying oven at 130℃~150℃ and heated and cured for 3 minutes to obtain a silicone skin layer laminated with polyurethane sponge product with release film. From top to bottom, the layers are sponge layer, silicone skin layer, tactile layer, and release film layer. 4) Leather embossing and protective film coating Remove the release film from the silicone leather-bonded polyurethane foam product prepared in step 3). Then, press the silicone leather-bonded polyurethane foam product with the desired leather texture using an embossing machine to obtain the desired silicone leather-bonded polyurethane foam product. Then, cover the upper part of the leather with the release film used in step 1) to obtain the silicone leather-bonded polyurethane foam product with a protective film. Remove the protective film when using.

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