A reactive feel agent, its preparation method and application

Abstract

The present invention belongs to the technical field of polyurethane synthetic leather, and specifically relates to a reactive feel agent, a preparation method thereof, and an application. The reactive feel agent provided by the present invention comprises a dihydroxy-terminated silicone oil, oleic acid amide, and erucic acid amide; the dihydroxy-terminated silicone oil is obtained by a condensation reaction of a hydrogen-terminated silicone oil and an allyl alcohol polyether; the mass percentage of the erucic acid amide in the dihydroxy-terminated silicone oil is ≤10%; the mass percentage of the oleic acid amide in the dihydroxy-terminated silicone oil is ≤10%. The reactive feel agent provided by the present invention utilizes the dihydroxy-terminated silicone oil to introduce a polysiloxane chain segment into the polyurethane molecular structure through a chemical bond. By compounding a small amount of oleic acid amide and erucic acid amide, while not affecting the reaction activity of the dihydroxy-terminated silicone oil, an ideal comprehensive feel can be provided, that is, a touch effect similar to that of baby skin with elasticity, fullness, and softness.

Description

Technical Field

[0001] The present invention belongs to the technical field of polyurethane synthetic leather, and particularly relates to a reactive feel agent, a preparation method thereof, and an application thereof. Background Art

[0002] Polyurethane (PU) synthetic leather belongs to a kind of polyurethane elastomer, having a soft, natural luster, a soft handfeel, and a strong genuine leather appearance. It has excellent mechanical properties such as excellent adhesion performance to the substrate, abrasion resistance, flex resistance, and anti-aging properties. At the same time, it also has advantages such as good cold resistance, breathability, washability, convenient processing, and low price, and is the most ideal substitute for natural leather.

[0003] Currently, most of the feel aids used in polyurethane dry synthetic leather (i.e., PU dry synthetic leather) are post-added types, that is, added after the synthesis of polyurethane resin or added when preparing the polyurethane resin mother liquor. For these post-added feel agents, some are prone to problems such as precipitation, fogging, and non-persistent handfeel on the surface of the synthetic leather due to poor compatibility with the system; some have good compatibility, but the handfeel is not prominent. In order to overcome these drawbacks, people have tried to introduce reactive feel agents to achieve excellent handfeel and good compatibility.

[0004] Currently, commercially available reactive feel agents, such as the reactive silicone oil OFX-3667 of Dow Chemical in the United States, still have poor skin feel and cannot meet the needs of consumers. Summary of the Invention

[0005] The purpose of the present invention is to provide a reactive feel agent, a preparation method thereof, and an application thereof. The reactive feel agent provided by the present invention can endow PU synthetic leather with an elastic, plump, and soft touch similar to that of baby skin, and provide an ideal comprehensive handfeel for PU synthetic leather.

[0006] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0007] The present invention provides a reactive feel agent, comprising a double-ended hydroxyl silicone oil, oleic acid amide, and erucic acid amide; the double-ended hydroxyl silicone oil is obtained by a condensation reaction of a hydrogen-containing silicone oil at both ends and an allyl alcohol polyether;

[0008] The mass percentage of the erucic acid amide in the double-ended hydroxyl silicone oil ≤ 10%;

[0009] The mass percentage of the oleic acid amide in the double-ended hydroxyl silicone oil ≤ 10%.

[0010] Preferably, the mass percentage of the erucic acid amide in the double-ended hydroxyl silicone oil is 5 - 10%;

[0011] The percentage of the mass of the oleic acid amide in the mass of the dihydroxy-terminated silicone oil is 5-10%.

[0012] Preferably, the relative molecular mass of the dihydroxy-terminated silicone oil is 6800-24000.

[0013] Preferably, the preparation method of the dihydroxy-terminated silicone oil comprises the following steps:

[0014] In a protective gas atmosphere, the dihydroxy-terminated silicone oil is heated and mixed by a hydrogen-terminated silicone oil, an allyl alcohol polyether and an inorganic platinum catalyst, and a condensation reaction is carried out to obtain the dihydroxy-terminated silicone oil.

[0015] Preferably, the relative molecular mass of the allyl alcohol polyether is 400-2000;

[0016] The hydrogen content of the hydrogen-terminated silicone oil is 0.01-0.0333%.

[0017] Preferably, the molar ratio of the allyl alcohol polyether to the hydrogen-terminated silicone oil is (2.2-2.5):1;

[0018] The temperature of the condensation reaction is 110-140 °C, and the heat preservation time of the condensation reaction is 1-3 h.

[0019] Preferably, the inorganic platinum catalyst is chloroplatinic acid or chloroplatinic acid hexahydrate;

[0020] The mass of the inorganic platinum catalyst is 2-10 ppm of the total mass of the allyl alcohol polyether and the hydrogen-terminated silicone oil.

[0021] The present invention provides a preparation method of the reactive feel improver described in the above technical solution, comprising the following steps:

[0022] The dihydroxy-terminated silicone oil, the oleic acid amide and the erucic acid amide are kneaded to obtain the reactive feel improver.

[0023] The present invention provides an application of the reactive feel improver described in the above technical solution or the reactive feel improver prepared by the preparation method described in the above technical solution in the dry preparation of polyurethane synthetic leather.

[0024] The present invention provides a method for dry-preparing polyurethane synthetic leather, comprising the following steps:

[0025] The reactive feel improver, diphenylmethane diisocyanate, polyol, catalyst, organic solvent and chain extender are mixed, and a polymerization reaction is carried out to obtain a modified polyurethane resin, and the reactive feel improver is the reactive feel improver described in the above technical solution or the reactive feel improver prepared by the preparation method described in the above technical solution;

[0026] Mix the modified polyurethane resin, dimethylformamide and synthetic leather black sheet to obtain a polyurethane dry process mother liquor;

[0027] Apply the polyurethane dry process mother liquor onto the release paper and then transfer it to the substrate to obtain a polyurethane synthetic leather; the substrate is a PU wet process BASE, a superfine fiber BASE or a synthetic leather base cloth.

[0028] The present invention provides a reactive feel agent, which includes bis-terminal hydroxyl silicone oil, oleic acid amide and erucic acid amide; the bis-terminal hydroxyl silicone oil is obtained by the condensation reaction of terminal hydrogen-containing silicone oil and allyl alcohol polyether; the mass percentage of erucic acid amide in the bis-terminal hydroxyl silicone oil is ≤10%; the mass percentage of oleic acid amide in the bis-terminal hydroxyl silicone oil is ≤10%. The reactive feel agent provided by the present invention grafts the hydroxyl group (-OH) in the bis-terminal hydroxyl silicone oil with isocyanate (-NCO), and introduces a polysiloxane chain segment into the polyurethane molecular structure through chemical bonds, avoiding the disadvantages such as surface precipitation, fogging, and non-persistent feel of the produced PU dry process synthetic leather that occur when adding a feel agent after the synthesis of the PU resin. At the same time, the reactive feel agent provided by the present invention is compounded with a small amount of oleic acid amide and erucic acid amide, which can provide an ideal comprehensive feel, namely an elastic, plump, soft touch similar to that of baby skin, without affecting the reaction activity of the bis-terminal hydroxyl silicone oil.

[0029] Furthermore, in the present invention, the relative molecular mass of the bis-terminal hydroxyl silicone oil is 6800 - 24000. By setting a more appropriate relative molecular mass, the present invention takes into account the balance between the reaction activity and feel of the bis-terminal hydroxyl silicone oil (a small relative molecular mass cannot provide a good feel, and an overly large relative molecular mass results in poor reaction activity of the bis-terminal hydroxyl silicone oil with isocyanate), and can further provide an ideal comprehensive feel, namely an elastic, plump, soft touch similar to that of baby skin.

[0030] The present invention provides a preparation method of the reactive feel agent described in the above technical solution, which includes the following steps: Knead the bis-terminal hydroxyl silicone oil, oleic acid amide and erucic acid amide to obtain the reactive feel agent. The present invention uses kneading to mix a high-viscosity liquid (bis-terminal hydroxyl silicone oil) with solid powders (oleic acid amide and erucic acid amide), and the composition of the obtained reactive feel agent is more uniform than that obtained by traditional mixing using a disperser. Specific embodiments

[0031] The present invention provides a reactive feel agent, which includes bis-terminal hydroxyl silicone oil, oleic acid amide and erucic acid amide; the bis-terminal hydroxyl silicone oil is obtained by the condensation reaction of terminal hydrogen-containing silicone oil and allyl alcohol polyether;

[0032] The mass percentage of erucic acid amide in the bis-terminal hydroxyl silicone oil is ≤10%;

[0033] The percentage of the mass of the oleic acid amide in the mass of the dihydroxy-terminated silicone oil ≤ 10%.

[0034] In the present invention, unless otherwise specified, all the preparation raw materials / components are commercially available products well-known to those skilled in the art.

[0035] The reactive feel improver provided by the present invention includes dihydroxy-terminated silicone oil.

[0036] In the present invention, the relative molecular mass of the dihydroxy-terminated silicone oil is preferably 6800 - 24000, more preferably 7000 - 22000, and further preferably 7500 - 20000.

[0037] In the present invention, the preparation method of the dihydroxy-terminated silicone oil preferably includes the following steps:

[0038] In an inert gas atmosphere, the dihydroxy-terminated silicone oil is heated and mixed with hydrogen-terminated silicone oil, allyl alcohol polyether and an inorganic platinum catalyst for a condensation reaction to obtain the dihydroxy-terminated silicone oil.

[0039] In the present invention, the inert gas is preferably an inert gas or nitrogen. The present invention has no special requirements for the type of the inert gas, and an inert gas well-known to those skilled in the art can be used, such as argon.

[0040] In the present invention, the relative molecular mass of the allyl alcohol polyether is preferably 400 - 2000, more preferably 450 - 1900, and further preferably 500 - 1800.

[0041] In the present invention, the hydrogen content of the hydrogen-terminated silicone oil is preferably 0.01 - 0.0333%, more preferably 0.02 - 0.033%, and further preferably 0.025 - 0.03%.

[0042] In the present invention, when the hydrogen content of the hydrogen-terminated silicone oil is preferably 0.01 - 0.0333%, the corresponding relative molecular mass of the hydrogen-terminated silicone oil is 6000 - 20000.

[0043] In the present invention, the hydrogen content of the hydrogen-terminated silicone oil refers to the mass percentage of the hydrogen atoms connected to the silicon atoms in the hydrogen-terminated silicone oil.

[0044] In the present invention, the molar ratio of the allyl alcohol polyether to the hydrogen-terminated silicone oil is preferably (2.2 - 2.5):1, more preferably (2.25 - 2.4):1.

[0045] In the present invention, the inorganic platinum catalyst is preferably chloroplatinic acid or chloroplatinic acid hexahydrate.

[0046] In the present invention, the mass of the inorganic platinum catalyst is preferably 2 to 10 ppm, more preferably 2.5 to 9 ppm, and further preferably 3 to 8 ppm of the total mass of the allyl alcohol polyether and the terminal hydrogen-containing silicone oil.

[0047] In the present invention, the heating and mixing preferably include the following steps: in a protective gas atmosphere, the double-terminal hydroxyl silicone oil is first heated and mixed with the terminal hydrogen-containing silicone oil and the allyl alcohol polyether to obtain a mixture; and then the mixture and the inorganic platinum catalyst are heated and mixed. In the present invention, the temperature of the mixture is preferably 70 to 100 °C.

[0048] In the present invention, the temperature of the condensation reaction is preferably 110 to 140 °C, more preferably 115 to 135 °C; the heat preservation time of the condensation reaction is preferably 1 to 3 h, more preferably 1.5 to 2.5 h.

[0049] The reactive feel agent provided by the present invention includes oleic acid amide. In the present invention, the mass percentage of the erucic acid amide in the double-terminal hydroxyl silicone oil is preferably 5 to 10%, more preferably 5.5 to 9%, and further preferably 6 to 8%.

[0050] The reactive feel agent provided by the present invention includes erucic acid amide. In the present invention, the mass percentage of the oleic acid amide in the double-terminal hydroxyl silicone oil is preferably 5 to 10%, more preferably 5.5 to 9%, and further preferably 6 to 8%.

[0051] The present invention provides a preparation method of the reactive feel agent described in the above technical solution, including the following steps:

[0052] Knead the double-terminal hydroxyl silicone oil, oleic acid amide and erucic acid amide to obtain the reactive feel agent.

[0053] In the present invention, the kneading is preferably carried out using a kneader.

[0054] The present invention provides an application of the reactive feel agent described in the above technical solution or the reactive feel agent prepared by the preparation method described in the above technical solution in the dry preparation of polyurethane synthetic leather.

[0055] The present invention provides a method for dry-preparing polyurethane synthetic leather, including the following steps:

[0056] Mix the reactive feel agent, diphenylmethane diisocyanate, polyol, catalyst, organic solvent and chain extender, and carry out a polymerization reaction to obtain a modified polyurethane resin, wherein the reactive feel agent is the reactive feel agent described in the above technical solution or the reactive feel agent prepared by the preparation method described in the above technical solution;

[0057] Mix the modified polyurethane resin, dimethylformamide, and synthetic leather black sheet to obtain a polyurethane dry process mother liquor;

[0058] Apply the polyurethane dry process mother liquor onto the release paper and then transfer it to the substrate to obtain a polyurethane synthetic leather; the substrate is a PU wet process BASE, a superfine fiber BASE, or a synthetic leather base cloth.

[0059] In the present invention, a reactive feel agent, diphenylmethane diisocyanate, a polyol, a catalyst, an organic solvent, and a chain extender are mixed and subjected to a polymerization reaction to obtain a modified polyurethane resin. The reactive feel agent is the reactive feel agent described in the above technical solution or the reactive feel agent prepared by the preparation method described in the above technical solution.

[0060] In the present invention, the organic solvent is preferably N,N-dimethylformamide.

[0061] In the present invention, the polyol is preferably a polyether diol and / or a polyester diol.

[0062] In the present invention, the relative molecular mass of the polyol is preferably 2000.

[0063] In the present invention, the catalyst is preferably bismuth isooctanoate or bismuth laurate.

[0064] In the present invention, the chain extender is preferably 1,4-butanediol.

[0065] In the present invention, the solid content of the modified polyurethane resin is preferably 30%.

[0066] In the present invention, the percentage of the reactive feel agent in the dry weight of the modified polyurethane resin is preferably 0.5 - 5%, more preferably 1 - 4%.

[0067] In the present invention, the modified polyurethane resin preferably comprises the following raw materials in parts by mass: 1.2 parts of reactive feel agent, 18 parts of diphenylmethane diisocyanate, 9 parts of diol, 0.1 part of catalyst, 70 parts of organic solvent, and 1.7 parts of chain extender.

[0068] After obtaining the polyurethane resin, in the present invention, the modified polyurethane resin, dimethylformamide, and synthetic leather black sheet are mixed to obtain a polyurethane dry process mother liquor.

[0069] In the present invention, in parts by mass, the polyurethane dry process mother liquor comprises the following components in parts by mass: 100 parts of modified polyurethane resin, 100 parts of dimethylformamide, and 5 parts of synthetic leather black sheet.

[0070] The present invention has no special requirements for the synthetic leather black sheet, and commercially available products can be used. In the present invention, the synthetic leather black sheet is a sheet made of carbon black, a resin carrier, and a dispersant.

[0071] After obtaining the polyurethane dry process mother liquor, the present invention applies the polyurethane dry process mother liquor to release paper, and then transfers it to a substrate to obtain a polyurethane synthetic leather.

[0072] In the present invention, the substrate is preferably a PU wet process BASE, a microfiber BASE, or a synthetic leather base fabric.

[0073] To further illustrate the present invention, the technical solutions provided by the present invention will be described in detail below in conjunction with embodiments, but they should not be construed as limiting the protection scope of the present invention.

[0074] Example 1

[0075] 161.3 g of allyl alcohol polyether with a relative molecular mass of 1000 and 838.7 g of terminal hydrogen-containing silicone oil with a hydrogen content of 0.01538% (relative molecular mass 13000) were added to a flask, nitrogen was introduced, the temperature was raised to 90 °C with stirring, 0.006 g of a catalyst (chloroplatinic acid) was added, the temperature was further raised to 120 °C, and the reaction was carried out for 2 hours under insulation. After cooling, a double-terminal hydroxyl silicone oil with a relative molecular mass of 15000 was obtained. 900 g of this double-terminal hydroxyl silicone oil was added to a kneader, the power of the kneader was turned on, and 60 g of erucamide and 80 g of oleic acid amide were slowly added while kneading. After adding, kneading was continued for 1 hour to obtain the reaction-type skin-friendly silicone oil A.

[0076] Example 2

[0077] 142.9 g of allyl alcohol polyether with a relative molecular mass of 400 and 857.1 g of terminal hydrogen-containing silicone oil with a hydrogen content of 0.03333% (relative molecular mass 6000) were added to a flask, nitrogen was introduced, the temperature was raised to 70 °C with stirring, 0.003 g of a catalyst (chloroplatinic acid) was added, the temperature was further raised to 130 °C, and the reaction was carried out for 2 hours under insulation. After cooling, a double-terminal hydroxyl silicone oil with a relative molecular mass of 6800 was obtained. 900 g of this double-terminal hydroxyl silicone oil was added to a kneader, the power of the kneader was turned on, and 100 g of erucamide and 50 g of oleic acid amide were slowly added while kneading. After adding, kneading was continued for 1 hour to obtain the reaction-type skin-friendly silicone oil B.

[0078] Example 3

[0079] 180.3 g of allyl alcohol polyether with a relative molecular mass of 2000 and 819.7 g of terminal hydrogen-containing silicone oil (relative molecular mass 20000) with a hydrogen content of 0.01% were added to a flask. Nitrogen was introduced, and the mixture was stirred and heated to 100 °C. 0.01 g of a catalyst (chloroplatinic acid) was added, and the temperature was further raised to 140 °C. The reaction was carried out under insulation for 3 hours and then cooled to obtain a double-terminal hydroxyl silicone oil with a relative molecular mass of 24000. 900 g of this double-terminal hydroxyl silicone oil was added to a kneader, the power of the kneader was turned on, and 50 g of erucic acid amide and 100 g of oleic acid amide were slowly added while kneading. After adding, kneading was continued for 1 hour to obtain the reaction-type skin-feel silicone oil C.

[0080] Comparative Example 1

[0081] 365.1 g of allyl alcohol polyether with a relative molecular mass of 500 and 634.9 g of terminal hydrogen-containing silicone oil (relative molecular mass 2000) with a hydrogen content of 0.1% were added to a flask. Nitrogen was introduced, and the mixture was stirred and heated to 80 °C. 0.05 g of a catalyst (chloroplatinic acid) was added, and the temperature was further raised to 130 °C. The reaction was carried out under insulation for 2 hours and then cooled to obtain a double-terminal hydroxyl silicone oil with a relative molecular mass of 3000. 900 g of this double-terminal hydroxyl silicone oil was added to a kneader, the power of the kneader was turned on, and 75 g of erucic acid amide and 75 g of oleic acid amide were slowly added while kneading. After adding, kneading was continued for 1 hour to obtain the comparative sample D.

[0082] Comparative Example 2

[0083] 230.8 g of allyl alcohol polyether with a relative molecular mass of 375 and 769.2 g of terminal hydrogen-containing silicone oil (relative molecular mass 3000) with a hydrogen content of 0.0667% were added to a flask. Nitrogen was introduced, and the mixture was stirred and heated to 80 °C. 0.04 g of a catalyst (chloroplatinic acid) was added, and the temperature was further raised to 130 °C. The reaction was carried out under insulation for 2 hours and then cooled to obtain a double-terminal hydroxyl silicone oil with a relative molecular mass of 3900. 900 g of this double-terminal hydroxyl silicone oil was added to a kneader, the power of the kneader was turned on, and 75 g of erucic acid amide and 75 g of oleic acid amide were slowly added while kneading. After adding, kneading was continued for 1 hour to obtain the comparative sample E.

[0084] Test Example 1

[0085] The reaction-type skin-feel silicone oils A, B, and C prepared in Examples 1 to 3 above, the samples D and E prepared in the comparative examples, and the reaction-type silicone oil OFX-3667 of Dow Chemical of the United States were used as reaction-type hand feel agents and added at a ratio of 4% of the dry weight of the modified polyurethane resin respectively to synthesize polyurethane dry resins with the same formula. Then, the polyurethane dry resins were used to produce polyurethane dry synthetic leather by the same method.

[0086] Among them, the preparation method of the polyurethane dry synthetic leather is as follows: Mix 1.2 parts of a reactive feel agent, 18 parts of diphenylmethane diisocyanate, 9 parts of a polyester diol with a relative molecular mass of 2000, 0.1 part of bismuth isooctanoate, 70 parts of N,N-dimethylformamide, and 1.7 parts of 1,4-butanediol, and carry out a polymerization reaction to obtain a modified polyurethane resin, and the solid content of the modified polyurethane resin is 30%; Mix 100 parts of the modified polyurethane resin, 100 parts of dimethylformamide, and 5 parts of a synthetic leather black sheet to obtain a polyurethane dry masterbatch; Coat the polyurethane dry masterbatch on release paper, and then transfer it to the BASE to obtain the polyurethane synthetic leather.

[0087] Finally, evaluate the skin feel and hand feel of these polyurethane dry synthetic leathers, and represent the quality of the skin feel and hand feel with scores. 10 points represent the best skin feel and hand feel, and 1 point represents the worst skin feel and hand feel. See Table 1.

[0088] Table 1 Skin feel and hand feel scores of the products prepared in the examples and comparative examples or the polyurethane dry synthetic leathers obtained

[0089] Added auxiliaries A B C D E OFX-3667 Skin feel and handle score 9 6 10 4 3 2

[0090] As can be seen from Table 1: The skin feel and hand feel of the polyurethane dry synthetic leathers prepared by adding the reactive skin feel silicone oil samples A, B, and C prepared in the three examples of the present invention are significantly better than those of Comparative Examples 1-2 and OFX-3667 of Dow Chemical Company, USA.

[0091] Although the above embodiments have made a detailed description of the present invention, they are only a part of the embodiments of the present invention, rather than all embodiments. Other embodiments can also be obtained according to these embodiments without creative efforts, and these embodiments all fall within the protection scope of the present invention.

Claims

1. A reactive feel improver, characterized in that, It includes dihydroxyl-terminated silicone oil, oleic acid amide and erucic acid amide; the dihydroxyl-terminated silicone oil is obtained by the condensation reaction of hydrogen-terminated silicone oil and allyl alcohol polyether; the relative molecular mass of the dihydroxyl-terminated silicone oil is 6,800 - 24,000; The mass percentage of the erucic acid amide in the dihydroxyl-terminated silicone oil ≤ 10%; The mass percentage of the oleic acid amide in the dihydroxyl-terminated silicone oil ≤ 10%.

2. The reactive feel improver according to claim 1, characterized in that, The mass percentage of the erucic acid amide in the dihydroxyl-terminated silicone oil is 5 - 10%; The mass percentage of the oleic acid amide in the dihydroxyl-terminated silicone oil is 5 - 10%.

3. The reactive feel improver according to claim 1, characterized in that, The preparation method of the dihydroxyl-terminated silicone oil includes the following steps: In a protective gas atmosphere, the hydrogen-terminated silicone oil, allyl alcohol polyether and inorganic platinum catalyst are heated and mixed to carry out the condensation reaction to obtain the dihydroxyl-terminated silicone oil.

4. The reactive feel improver according to claim 3, characterized in that, The relative molecular mass of the allyl alcohol polyether is 400 - 2,000; The hydrogen content of the hydrogen-terminated silicone oil is 0.01 - 0.0333%; 5. The reactive feel improver according to claim 3, characterized in that, The molar ratio of the allyl alcohol polyether to the hydrogen-terminated silicone oil is (2.2 - 2.5):1; The temperature of the condensation reaction is 110 - 140 °C, and the heat preservation time of the condensation reaction is 1 - 3 h.

6. The reactive feel improver according to claim 3, characterized in that, The inorganic platinum catalyst is chloroplatinic acid or chloroplatinic acid hexahydrate; The mass of the inorganic platinum catalyst is 2 - 10 ppm of the total mass of the allyl alcohol polyether and the hydrogen-terminated silicone oil.

7. A method for preparing the reactive feel improver according to any one of claims 1 to 6, characterized in that, It includes the following steps: The dihydroxyl-terminated silicone oil, oleic acid amide and erucic acid amide are kneaded to obtain the reactive feel agent.

8. Application of the reactive feel improver according to any one of claims 1 to 6 or the reactive feel improver prepared by the preparation method according to claim 7 in the dry preparation of polyurethane synthetic leather.

9. A method for dry preparing polyurethane synthetic leather, characterized in that, It includes the following steps: The reactive feel agent, diphenylmethane diisocyanate, polyol, catalyst, organic solvent and chain extender are mixed to carry out the polymerization reaction to obtain the modified polyurethane resin, and the reactive feel agent is the reactive feel agent described in any one of claims 1 - 6 or the reactive feel agent prepared by the preparation method described in claim 7; The modified polyurethane resin, dimethylformamide and synthetic leather black sheet are mixed to obtain the polyurethane dry method mother liquor; The polyurethane dry method mother liquor is coated on the release paper and then transferred to the substrate to obtain the polyurethane synthetic leather; the substrate is a PU wet method BASE, a superfine fiber BASE or a synthetic leather base cloth.