Hydrophobic self-skinning high resilience polyurethane blend and its preparation method and application

Abstract

The present invention belongs to the technical field of polyurethane, and particularly relates to a hydrophobic self-skinning high-resilience polyurethane blend and its preparation method and application. The polyurethane blend is prepared from component A and component B in a mass ratio of 100:(45-65). Among them, component A includes the following raw materials: polyether polyol 1, polyether polyol 2, polymer polyol, chain extender, crosslinking agent, foaming agent, foam stabilizer, composite catalyst, antioxidant and ultraviolet absorber; component B includes the following raw materials: castor oil polyol, polyether polyol 3, pure MDI, liquefied MDI and polymeric MDI; the prepared polyurethane blend has excellent physical properties, resistance to humidity and heat, and hydrophobic properties, and the ship seat material prepared by using it can effectively cope with the complex and changeable environmental conditions on water.

Description

Technical Field

[0001] The invention belongs to the technical field of polyurethane, and in particular relates to a hydrophobic self-skinning high-resilience polyurethane composite material and a preparation method and application thereof. Background Art

[0002] Modern seafarers and passengers have increasing requirements for the safety and comfort of ship facilities. At the same time, due to the complex and changeable sailing environment of ships, their seats are exposed to harsh conditions such as direct sunlight, wind and rain, and salt spray corrosion for a long time. The material of ship seats must have excellent weather resistance and not be easily aged, faded, deformed or damaged due to ultraviolet radiation, high temperature and high humidity environment, and salt spray corrosion, ensuring that the performance can be maintained during long-term use. In addition, the seats must have sufficient strength to withstand the impact force caused by wind and waves and turbulence during the voyage of the ship, as well as the force in emergencies (such as collisions), while ensuring that the seats will not be damaged when they are under pressure of a certain multiple of the weight of passengers.

[0003] Polyurethane self-skinning materials have high strength, toughness and wear resistance, and can withstand the bumps and vibrations during the ship's journey and the frequent use of passengers, and are not prone to cracking, deformation and other problems. However, under the complex and changeable environmental conditions on the water, conventional polyurethane self-skinning materials will be corroded by ultraviolet rays, salt spray, humidity and other factors, resulting in performance degradation, and the surface may have undesirable phenomena such as discoloration and powdering.

[0004] Therefore, it is particularly necessary to develop a new polyurethane self-skinning material to meet the current stringent requirements for high hydrophobicity, moisture and heat resistance, and high physical properties. Summary of the invention

[0005] In view of the deficiencies in the prior art, the object of the present invention is to provide a hydrophobic self-skinning high-resilient polyurethane composite material, which has excellent physical properties, moisture and heat resistance, and hydrophobic properties. The ship seat material prepared using the composite material can effectively cope with the complex and changeable environmental conditions on the water.

[0006] Another object of the present invention is to provide a preparation method and application of a hydrophobic self-skinning high-resilience polyurethane composite material.

[0007] The technical solution adopted by the present invention is as follows:

[0008] The hydrophobic self-skinning high-resilience polyurethane composite material is made of component A and component B in a mass ratio of 100:(45-65), wherein component A includes the following raw materials in parts by mass:

[0009] Polyether polyol 1: 40-60 parts;

[0010] Polyether polyol 2: 10-20 parts;

[0011] Polymeric polyol: 30 - 50 parts;

[0012] Chain extender: 5 - 10 parts;

[0013] Crosslinking agent: 0.4 - 1.2 parts;

[0014] Foaming agent: 0.8 - 1.2 parts;

[0015] Foam stabilizer: 0.5 - 1.0 part;

[0016] Compound catalyst: 1 - 1.2 parts;

[0017] Antioxidant: 0.5 - 1 part;

[0018] UV absorber: 0.5 - 1 part;

[0019] Component B comprises raw materials in the following parts by mass:

[0020] Castor oil polyol: 4 - 7 parts;

[0021] Polyether polyol 3: 2 - 5 parts;

[0022] Pure MDI: 20 - 30 parts;

[0023] Liquefied MDI: 60 - 80 parts;

[0024] Polymeric MDI: 5 - 10 parts;

[0025] The polyether polyol 1 has a functionality of 3 and a hydroxyl value of 21 - 24 mg KOH / g; preferably CHE - 822P of Changhua Chemical Technology Co., Ltd.

[0026] The polyether polyol 2 has a functionality of 2 and a hydroxyl value of 26.5 - 57.5 mg KOH / g; preferably one of INOVOL C220, INOVOL C230 or INOVOL C240A of Shandong Yinuowei New Materials Co., Ltd.

[0027] The polyether polyol 3 has a functionality of 3 and a hydroxyl value of 440 - 460 mg KOH / g; preferably INOVOL C304 of Shandong Yinuowei New Materials Co., Ltd.

[0028] The castor oil polyol is prepared by hydrosilylation reaction of castor oil with decamethyl - dihydropentasiloxane.

[0029] The polymeric polyol has a functionality of 3, a hydroxyl value of 22.0 - 27.0 mg KOH / g, and a solid content of 26.0 - 30.0%; preferably CHP - H30 of Changhua Chemical Technology Co., Ltd.

[0030] The chain extender is one or more of ethylene glycol or 1,4-butanediol; the crosslinking agent is one or more of diethanolamine or triethanolamine.

[0031] The blowing agent is water.

[0032] The foam stabilizer is an organosilicon foam stabilizer, preferably UA-8823LV of Hemu New Material Technology (Shanghai) Co., Ltd.

[0033] The composite catalyst is a mixture of a delayed catalyst, a blowing catalyst, and an auxiliary catalyst. Among them, the delayed catalyst is preferably XR Cat 8154, the blowing catalyst is preferably XR Cat 617, and the auxiliary catalyst is preferably XR Cat3040, all purchased from Shanghai Xinrui New Material Technology Co., Ltd.

[0034] The antioxidant is RIANOX ® 1135, purchased from Tianjin Leailong New Materials Co., Ltd.

[0035] The ultraviolet absorber is RIASORB ® UV-1130, purchased from Tianjin Leailong New Materials Co., Ltd.

[0036] The preparation method of the castor oil polyol includes the following steps:

[0037] Under a nitrogen atmosphere, decamethyl-dihydro-pentasiloxane and castor oil with a mass ratio of (1.2-1.5):1 are mixed, and under the action of a chloroplatinic acid catalyst, the reaction is carried out at 95-105 °C for 7.5-8.5 h to obtain castor oil polyol. Among them, the dosage of the chloroplatinic acid catalyst is 0.8-1 wt.% of the total mass of decamethyl-dihydro-pentasiloxane and castor oil.

[0038] The preparation method of the hydrophobic self-skinning high resilience polyurethane blend includes the following steps:

[0039] (1) Preparation of component A: Put polyether polyol 1, polyether polyol 2, polymer polyol, chain extender, crosslinking agent, blowing agent, foam stabilizer, composite catalyst, antioxidant, and ultraviolet absorber into a reaction kettle, heat up to 40-50 °C, stir the materials in the reaction kettle at a stirring speed of 30-40 r / min, and the stirring time is 40-50 min. After stirring, component A is obtained;

[0040] (2)Preparation of Component B: Mix castor oil polyol, polyether polyol 3, pure MDI, liquefied MDI and polymeric MDI, heat to 80 - 85 °C, stir the materials in the reaction kettle at a stirring speed of 30 - 40 r / min for 40 - 50 min. After stirring, Component B is obtained;

[0041] (3)After uniformly mixing Component A and Component B by mass ratio, inject them into a mold. Open the mold and cure after 4 - 5 min to obtain a hydrophobic self - skinning high - resilience polyurethane composite.

[0042] The application of the described hydrophobic self - skinning high - resilience polyurethane composite is used for ship seat materials.

[0043] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0044] (1)By adopting a composite catalyst composed of a delayed catalyst, a foaming catalyst and an auxiliary catalyst, the present invention ensures that the materials have sufficient fluidity during the preparation process, which not only facilitates the uniform progress of the reaction but also significantly improves the production efficiency. At the same time, this composite catalyst system can effectively promote the curing process of the product skin, making the finally obtained hydrophobic self - skinning high - resilience polyurethane composite have a denser skin structure, thus enhancing the durability and service life of the product;

[0045] (2)Through molecular structure design, the present invention introduces a castor oil hydrophobic group containing a silane structure and a small - molecule polyether structure, which not only significantly improves the hydrophobic performance of the product, enabling it to maintain long - term stability in a humid environment, but also endows the product with excellent physical properties such as high strength, high resilience and good aging resistance. These performance improvements make the polyurethane composite of the present invention particularly suitable for preparing materials such as ship seats;

[0046] (3)The preparation method of the present invention can stably produce products with excellent performance by precisely controlling the ratio of Component A and Component B and the preparation conditions. The operation is simple and easy for industrial production. Specific Embodiments

[0047] The following further illustrates the present invention with reference to embodiments, but it does not limit the implementation of the present invention.

[0048] The raw materials used in the examples and comparative examples are all conventional commercially available raw materials without special instructions, and the process methods used in the examples and comparative examples are all conventional methods in the art without special instructions.

[0049] Some raw material descriptions used in the examples and comparative examples are as follows:

[0050] CHE-822P, CHP-H30: purchased from Changhua Chemical Technology Co., Ltd.;

[0051] INOVOL C220, INOVOL C230, INOVOL C240A, INOVOL C304: purchased from Shandong Yinuowei New Materials Co., Ltd.;

[0052] RIASORB ® UV-1130、RIANOX ® 1135: purchased from Tianjin Lianlong New Materials Co., Ltd.;

[0053] XR Cat 8154, XR Cat 617, XR Cat 3040: purchased from Shanghai Xinrui New Material Technology Co., Ltd.;

[0054] UA-8823LV: purchased from Hemu New Materials Technology (Shanghai) Co., Ltd.;

[0055] DXCAT ® A-1, DXCAT ® A33: Purchased from Shandong Dingxin New Material Technology Co., Ltd.

[0056] Example 1

[0057] The hydrophobic self-skinning high-resilience polyurethane composite material is made of component A and component B in a mass ratio of 100:45, wherein component A includes the following raw materials in mass fractions:

[0058] CHE-822P: 60 copies;

[0059] INOVOL C220: 10 parts;

[0060] CHP-H30: 30 parts;

[0061] Ethylene glycol: 5 parts;

[0062] Diethanolamine: 0.4 parts;

[0063] UA-8823LV: 0.5 parts;

[0064] XR Cat 617: 0.2 parts;

[0065] XR Cat 8154: 0.4 copies;

[0066] XR Cat 3040: 0.4 parts;

[0067] Water: 0.8 parts;

[0068] RIASORB ® UV-1130: 0.5 parts;

[0069] RIANOX ® 1135: 0.5 parts;

[0070] Component B includes raw materials in the following parts by mass:

[0071] Castor oil polyol: 4 parts;

[0072] INOVOL C304: 5 parts;

[0073] Pure MDI: 20 parts;

[0074] Liquefied MDI: 80 parts;

[0075] Polymeric MDI: 5 parts.

[0076] The preparation method of the castor oil polyol described above includes the following steps:

[0077] Under a nitrogen atmosphere, decamethyl-dihydro-pentasiloxane and castor oil with a mass ratio of 1.2:1 are mixed, and under the action of a chloroplatinic acid catalyst, the reaction is carried out at 95 °C for 7.5 h to obtain castor oil polyol. Among them, the dosage of the chloroplatinic acid catalyst is 0.8 wt.% of the total mass of decamethyl-dihydro-pentasiloxane and castor oil.

[0078] The preparation method of the hydrophobic self-skinning high resilience polyurethane blendstock described above includes the following steps:

[0079] (1) Preparation of Component A: CHE-822P, INOVOL C220, CHP-H30, ethylene glycol, diethanolamine, UA-8823LV, water, XR Cat 617, XR Cat 8154, XR Cat 3040, RIASORB ® UV-1130 and RIANOX ® 1135 are put into a reaction kettle, heated to 40 °C, and the materials in the reaction kettle are stirred at a stirring speed of 30 r / min for 40 min. After stirring is completed, Component A is obtained;

[0080] (2) Preparation of Component B: Castor oil polyol, INOVOL C304, pure MDI, liquefied MDI, and polymeric MDI are mixed, heated to 80 °C, and the materials in the reaction kettle are stirred at a stirring speed of 30 r / min for 40 min. After stirring is completed, Component B is obtained, and its NCO content is 25.95 ± 0.5%;

[0081] (3) Component A and Component B are mixed evenly according to a mass ratio of 100:45, injected into a mold, and the mold is opened and cured after 4 min to obtain the hydrophobic self-skinning high resilience polyurethane blendstock.

[0082] Example 2

[0083] The hydrophobic self-skinning high resilience polyurethane blend is made from component A and component B in a mass ratio of 100:55. Among them, component A includes raw materials in the following mass parts:

[0084] CHE-822P: 50 parts;

[0085] INOVOL C230: 10 parts;

[0086] CHP-H30: 40 parts;

[0087] 1,4-butanediol: 10 parts;

[0088] Triethanolamine: 1.2 parts;

[0089] UA-8823LV: 0.6 parts;

[0090] XR Cat 617: 0.1 part;

[0091] XR Cat 8154: 0.4 part;

[0092] XR Cat 3040: 0.6 part;

[0093] Water: 0.9 part;

[0094] RIASORB ® UV-1130: 0.7 part;

[0095] RIANOX ® 1135: 0.7 part;

[0096] Component B includes raw materials in the following mass parts:

[0097] Castor oil polyol: 5 parts;

[0098] INOVOL C304: 4 parts;

[0099] Pure MDI: 30 parts;

[0100] Liquefied MDI: 60 parts;

[0101] Polymeric MDI: 10 parts.

[0102] The preparation method of the castor oil polyol includes the following steps:

[0103] Under a nitrogen atmosphere, decamethyl-dihydro-pentasiloxane and castor oil with a mass ratio of 1.3:1 were mixed, and reacted at 100 °C for 8 h under the action of a chloroplatinic acid catalyst to obtain castor oil polyol. Among them, the dosage of the chloroplatinic acid catalyst was 0.9 wt.% of the total mass of decamethyl-dihydro-pentasiloxane and castor oil.

[0104] The preparation method of the hydrophobic self-skinning high resilience polyurethane blend includes the following steps:

[0105] (1) Preparation of component A: CHE-822P, INOVOL C230, CHP-H30, 1,4-butanediol, triethanolamine, UA-8823LV, water, XR Cat 617, XR Cat 8154, XR Cat 3040, RIASORB ® UV-1130 and RIANOX ® were put into a reaction kettle, heated to 45 °C, and the materials in the reaction kettle were stirred at a stirring speed of 35 r / min for 45 min. After stirring, component A was obtained;

[0106] (2) Preparation of component B: Castor oil polyol, INOVOL C304, pure MDI, liquefied MDI and polymeric MDI were mixed, heated to 82 °C, and the materials in the reaction kettle were stirred at a stirring speed of 35 r / min for 45 min. After stirring, component B was obtained, and its NCO content was 26.43 ± 0.5%;

[0107] (3) Component A and component B were mixed evenly according to a mass ratio of 100:55, injected into a mold, and the mold was opened and cured after 4.5 min to obtain the hydrophobic self-skinning high resilience polyurethane blend.

[0108] Example 3

[0109] The hydrophobic self-skinning high resilience polyurethane blend is made of component A and component B according to a mass ratio of 100:65. Among them, component A includes the following raw materials in parts by mass:

[0110] CHE-822P: 40 parts;

[0111] INOVOL C240A: 10 parts;

[0112] CHP-H30: 50 parts;

[0113] Ethylene glycol: 6 parts;

[0114] 1,4-butanediol: 4 parts;

[0115] Diethanolamine: 0.4 part;

[0116] Triethanolamine: 0.4 parts;

[0117] UA-8823LV: 0.7 parts;

[0118] XR Cat 617: 0.2 parts;

[0119] XR Cat 8154: 0.5 parts;

[0120] XR Cat 3040: 0.3 parts;

[0121] Water: 1 part;

[0122] RIASORB ® UV-1130: 0.8 parts;

[0123] RIANOX ® 1135: 0.8 parts;

[0124] Component B comprises raw materials in the following parts by mass:

[0125] Castor oil polyol: 6 parts;

[0126] INOVOL C304: 3 parts;

[0127] Pure MDI: 25 parts;

[0128] Liquefied MDI: 70 parts;

[0129] Polymeric MDI: 5 parts.

[0130] The preparation method of the castor oil polyol comprises the following steps:

[0131] Under a nitrogen atmosphere, decamethyl-dihydro-pentasiloxane and castor oil with a mass ratio of 1.4:1 are mixed, and reacted at 105 °C for 8.5 h under the action of a chloroplatinic acid catalyst to obtain the castor oil polyol, wherein the dosage of the chloroplatinic acid catalyst is 1 wt.% of the total mass of decamethyl-dihydro-pentasiloxane and castor oil.

[0132] The preparation method of the hydrophobic self-skinning high resilience polyurethane blend comprises the following steps:

[0133] (1) Preparation of Component A: CHE-822P, INOVOL C240A, CHP-H30, ethylene glycol, 1,4-butanediol, diethanolamine, triethanolamine, UA-8823LV, water, XR Cat 617, XR Cat 8154, XR Cat 3040, RIASORB ® UV-1130 and RIANOX ®Put 1135 into the reaction kettle, heat it up to 50 °C, stir the materials in the reaction kettle at a stirring speed of 40 r / min for 50 min. After stirring, Component A is obtained;

[0134] (2) Preparation of Component B: Mix castor oil polyol, INOVOL C304, pure MDI, liquefied MDI and polymeric MDI, heat it up to 80 °C, stir the materials in the reaction kettle at a stirring speed of 35 r / min for 45 min. After stirring, Component B is obtained, and its NCO content is 26.37 ± 0.5%;

[0135] (3) Mix Component A and Component B evenly according to the mass ratio of 100:65, inject them into the mold, and open the mold and cure after 5 min to obtain a hydrophobic self-skinning high resilience polyurethane blend.

[0136] Example 4

[0137] The hydrophobic self-skinning high resilience polyurethane blend is made from Component A and Component B according to the mass ratio of 100:60. Among them, Component A includes the following raw materials in parts by mass:

[0138] CHE-822P: 50 parts;

[0139] INOVOL C220: 20 parts;

[0140] CHP-H30: 30 parts;

[0141] Ethylene glycol: 4 parts;

[0142] 1,4-Butanediol: 4 parts;

[0143] Diethanolamine: 0.5 part;

[0144] Triethanolamine: 0.5 part;

[0145] UA-8823LV: 0.8 part;

[0146] XR Cat 617: 0.3 part;

[0147] XR Cat 8154: 0.4 part;

[0148] XR Cat 3040: 0.4 part;

[0149] Water: 1.1 parts;

[0150] RIASORB ® UV-1130: 0.9 part;

[0151] RIANOX ® 1135: 0.9 part;

[0152] Component B comprises raw materials in the following parts by mass:

[0153] Castor oil polyol: 7 parts;

[0154] INOVOL C304: 2 parts;

[0155] Pure MDI: 30 parts;

[0156] Liquefied MDI: 65 parts;

[0157] Polymeric MDI: 7 parts.

[0158] The preparation method of the castor oil polyol comprises the following steps:

[0159] Under a nitrogen atmosphere, decamethyl-dihydro-pentasiloxane and castor oil with a mass ratio of 1.5:1 are mixed, and reacted at 100 °C for 8 h under the action of a chloroplatinic acid catalyst to obtain the castor oil polyol, wherein the dosage of the chloroplatinic acid catalyst is 0.8 wt.% of the total mass of decamethyl-dihydro-pentasiloxane and castor oil.

[0160] The preparation method of the hydrophobic self-skinning high resilience polyurethane blend comprises the following steps:

[0161] (1) Preparation of Component A: CHE-822P, INOVOL C220, CHP-H30, ethylene glycol, 1,4-butanediol, diethanolamine, triethanolamine, UA-8823LV, water, XR Cat 617, XR Cat 8154, XR Cat 3040, RIASORB ® UV-1130 and RIANOX ® 1135 are put into a reaction kettle, heated to 40 °C, and the materials in the reaction kettle are stirred at a stirring speed of 30 r / min for 40 min. After stirring is completed, Component A is obtained;

[0162] (2) Preparation of Component B: Castor oil polyol, INOVOL C304, pure MDI, liquefied MDI and polymeric MDI are mixed, heated to 80 °C, and the materials in the reaction kettle are stirred at a stirring speed of 35 r / min for 45 min. After stirring is completed, Component B is obtained, and its NCO content is 26.84 ± 0.5%;

[0163] (3) Component A and Component B are mixed evenly according to a mass ratio of 100:60, injected into a mold, and demolded and cured after 4 min to obtain the hydrophobic self-skinning high resilience polyurethane blend.

[0164] Example 5

[0165] The described hydrophobic self-skinning high-resilience polyurethane blend is made from component A and component B in a mass ratio of 100:58. Among them, component A includes raw materials in the following mass fractions:

[0166] CHE-822P: 40 parts;

[0167] INOVOL C240A: 15 parts;

[0168] CHP-H30: 45 parts;

[0169] Ethylene glycol: 4 parts;

[0170] 1,4-Butanediol: 2 parts;

[0171] Diethanolamine: 0.6 part;

[0172] Triethanolamine: 0.6 part;

[0173] UA-8823LV: 1 part;

[0174] XR Cat 617: 0.2 part;

[0175] XR Cat 8154: 0.4 part;

[0176] XR Cat 3040: 0.6 part;

[0177] Water: 1.2 parts;

[0178] RIASORB ® UV-1130: 1 part;

[0179] RIANOX ® 1135: 1 part;

[0180] Component B includes raw materials in the following mass fractions:

[0181] Castor oil polyol: 4 parts;

[0182] INOVOL C304: 4 parts;

[0183] Pure MDI: 20 parts;

[0184] Liquefied MDI: 75 parts;

[0185] Polymeric MDI: 10 parts.

[0186] The preparation method of the described castor oil polyol includes the following steps:

[0187] Under a nitrogen atmosphere, decamethyldihydrodisiloxane and castor oil with a mass ratio of 1.3:1 were mixed and reacted at 95 °C for 8 h under the action of a chloroplatinic acid catalyst to obtain castor oil polyol. The amount of the chloroplatinic acid catalyst used was 0.9 wt.% of the total mass of decamethyldihydrodisiloxane and castor oil.

[0188] The preparation method of the hydrophobic self-skinning high resilience polyurethane blend includes the following steps:

[0189] (1) Preparation of component A: CHE-822P, INOVOL C240A, CHP-H30, ethylene glycol, 1,4-butanediol, diethanolamine, triethanolamine, UA-8823LV, water, XR Cat 617, XR Cat 8154, XR Cat 3040, RIASORB ® UV-1130 and RIANOX ® 1135 were put into a reaction kettle, heated to 45 °C, and the materials in the reaction kettle were stirred at a stirring speed of 40 r / min for 45 min. After stirring, component A was obtained;

[0190] (2) Preparation of component B: Castor oil polyol, INOVOL C304, pure MDI, liquefied MDI, and polymeric MDI were mixed and heated to 85 °C, and the materials in the reaction kettle were stirred at a stirring speed of 40 r / min for 50 min. After stirring, component B was obtained, and its NCO content was 26.53 ± 0.5%;

[0191] (3) Component A and component B were mixed evenly according to a mass ratio of 100:58, injected into a mold, and the mold was opened and cured after 5 min to obtain the hydrophobic self-skinning high resilience polyurethane blend.

[0192] Comparative Example 1

[0193] The difference from Example 4 was that INOVOL C220 in component A was replaced with the same mass of CHE-822P, and the others were the same as in Example 4.

[0194] Comparative Example 2

[0195] The difference from Example 4 was that the composite catalyst in component A was replaced with 0.1 part of DXCAT ® A-1 and 0.5 part of DXCAT ® A33, and the others were the same as in Example 4.

[0196] Comparative Example 3

[0197] The difference from Example 4 was that RIASORB was not added to component A ®UV-1130 and RIANOX ® 1135, and the others are the same as in Example 4.

[0198] Comparative Example 4

[0199] The difference from Example 4 is that the castor oil polyol in Component B is replaced with the same mass fraction of castor oil, and the others are the same as in Example 4.

[0200] Comparative Example 5

[0201] The difference from Example 4 is that INOVOL C304 is not added to Component B, and the others are the same as in Example 4.

[0202] The performance of the polyurethane blends prepared in Examples 1-5 and Comparative Examples 1-5 was tested, and the test methods are as follows:

[0203] Density: Tested with reference to GB / T 6343-2009;

[0204] Surface hardness: Tested with reference to GB / T 531-1999;

[0205] Tensile strength: Tested with reference to GB / T 6344-2008;

[0206] Elongation at break: Tested with reference to GB / T 6344-2008;

[0207] Dimensional stability: Tested with reference to GB / T 8811-2018;

[0208] Salt water resistance: Drop 2 drops of 3.5 wt.% NaCl solution on the surface of a sample with a surface size of 20 mm×20 mm, and observe the penetration after 15 minutes.

[0209] Water absorption: Tested with reference to GB / T 8810-2005;

[0210] Compression set: Tested with reference to GB / T 6669-2008;

[0211] Humid heat aging: Place the sample to be tested at 95°C and 95% humidity for 200 h, then test the mechanical properties, dimensional stability and salt water resistance of the product respectively, and calculate the ratio of the mechanical properties of the sample after humid heat aging to the initial mechanical properties, that is, the retention rate of humid heat aging;

[0212] Dry aging: Place the sample to be tested at 150°C for 72 h, then test the mechanical properties, dimensional stability and salt water resistance of the product respectively, and calculate the ratio of the mechanical properties of the sample after dry aging to the initial mechanical properties, that is, the retention rate of dry aging;

[0213] Low temperature: After placing the sample to be tested at -60°C for 24 hours, test the dimensional stability of the product.

[0214] The test results are shown in Table 1-2:

[0215] Table 1 Performance test results of examples

[0216]

[0217] From the data in Table 1, it can be seen that the polyurethane blends prepared in Examples 1-5 have high hydrophobicity and excellent dry and wet heat aging resistance, and at the same time have good dry aging, wet heat aging and low temperature dimensional stability; among them, the retention rates of dry aging and wet heat aging of tensile strength are both higher than 85%, and the retention rates of dry aging and wet heat aging of elongation at break are both greater than 80%.

[0218] Table 2 Performance test results of comparative examples

[0219]

[0220] From the comparison between Example 4 and Comparative Example 1, it can be seen that the addition of polyether diol in Component A of the present invention can significantly improve the physical properties of the polyurethane blend, so that it can withstand the impact force generated during navigation.

[0221] From the comparison between Example 4 and Comparative Example 2, it can be seen that the composite catalyst composed of the delayed catalyst, foaming catalyst and auxiliary catalyst used in Component A of the present invention can not only ensure sufficient fluidity of the material, but also ensure good product appearance and excellent performance.

[0222] From the comparison between Example 4 and Comparative Example 3, it can be seen that the antioxidants and ultraviolet absorbers added in Component A of the present invention can significantly improve the aging resistance of the polyurethane blend, so that it can adapt to complex navigation environments.

[0223] From the comparison between Example 4 and Comparative Examples 4 and 5, it can be seen that the highly hydrophobic Component B synthesized in the present invention can not only improve the physical properties of the product, but also enhance its wet heat aging resistance.

[0224] Generally speaking, the polyurethane blend prepared in the present invention exhibits good high temperature aging resistance, wet heat aging resistance and excellent hydrophobic properties. The ship seat material made of this blend can cope with various water environment changes and effectively extend the service life of ship seats.

Claims

1. A hydrophobic self-skinning high resilience polyurethane blend, characterized in that, It is made from component A and component B in a mass ratio of 100:(45 - 65). Among them, component A includes raw materials in the following mass parts: Polyether polyol 1: 40 - 60 parts; Polyether polyol 2: 10 - 20 parts; Polymer polyol: 30 - 50 parts; Chain extender: 5 - 10 parts; Crosslinking agent: 0.4 - 1.2 parts; Blowing agent: 0.8 - 1.2 parts; Foam stabilizer: 0.5 - 1.0 part; Compound catalyst: 1 - 1.2 parts; Antioxidant: 0.5 - 1 part; Ultraviolet absorber: 0.5 - 1 part; Component B includes raw materials in the following mass parts: Castor oil polyol: 4 - 7 parts; Polyether polyol 3: 2 - 5 parts; Pure MDI: 20 - 30 parts; Liquefied MDI: 60 - 80 parts; Polymeric MDI: 5 - 10 parts; The polyether polyol 1 has a functionality of 3 and a hydroxyl value of 21 - 24 mgKOH / g; The polyether polyol 2 has a functionality of 2 and a hydroxyl value of 26.5 - 57.5 mgKOH / g; The polyether polyol 3 has a functionality of 3 and a hydroxyl value of 440 - 460 mgKOH / g; The castor oil polyol is prepared by hydrosilylation reaction of castor oil and decamethyl dihydropentasiloxane; The compound catalyst is a mixture of XR Cat 8154, XR Cat 617 and XR Cat 3040.

2. The hydrophobic self-skinning high resilience polyurethane blend according to claim 1, characterized in that, The polymeric polyol has a functionality of 3, a hydroxyl value of 22.0 - 27.0 mgKOH / g, and a solid content of 26.0 - 30.0%.

3. The hydrophobic self-skinning high resilience polyurethane blend according to claim 1, characterized in that, The chain extender is one or more of ethylene glycol or 1,4 - butanediol; the crosslinking agent is one or more of diethanolamine or triethanolamine.

4. The hydrophobic self-skinning high resilience polyurethane blend according to claim 1, wherein The blowing agent is water; the foam stabilizer is a silicone foam stabilizer.

5. The hydrophobic self-skinning high resilience polyurethane blend according to claim 1, characterized in that, The antioxidant described above is RIANOX ® 1135 6. The hydrophobic self-skinning high resilience polyurethane blend according to claim 1, wherein The ultraviolet absorber described above is RIASORB ® UV-1130.

7. The hydrophobic integral skin high resilience polyurethane blend according to claim 1, characterized in that, The preparation method of the castor oil polyol includes the following steps: Under a nitrogen atmosphere, decamethyl dihydropentasiloxane and castor oil are mixed in a mass ratio of (1.2 - 1.5):1, and under the action of a chloroplatinic acid catalyst, the reaction is carried out at 95 - 105 °C for 7.5 - 8.5 h to obtain the castor oil polyol. Among them, the dosage of the chloroplatinic acid catalyst is 0.8 - 1 wt.% of the total mass of decamethyl dihydropentasiloxane and castor oil.

8. A method for preparing the hydrophobic self-skinning high resilience polyurethane blend material according to any one of claims 1-7, characterized in that, It includes the following steps: (1) Preparation of component A: Put polyether polyol 1, polyether polyol 2, polymeric polyol, chain extender, crosslinking agent, blowing agent, foam stabilizer, compound catalyst, antioxidant and ultraviolet absorber into a reaction kettle, heat up to 40 - 50 °C, stir the materials in the reaction kettle at a stirring speed of 30 - 40 r / min, and the stirring time is 40 - 50 min. After stirring is completed, component A is obtained; (2) Preparation of component B: Mix castor oil polyol, polyether polyol 3, pure MDI, liquefied MDI and polymeric MDI, heat up to 80 - 85 °C, stir the materials in the reaction kettle at a stirring speed of 30 - 40 r / min, and the stirring time is 40 - 50 min. After stirring is completed, component B is obtained; (3) After mixing component A and component B evenly according to the mass ratio, inject them into the mold. Open the mold and cure after 4 - 5 minutes to obtain a hydrophobic self - skinning high - resilience polyurethane blend.

9. Use of the hydrophobic self-skinning high resilience polyurethane composition according to any one of claims 1-7, characterized in that, For ship seat materials.

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