Bio-based organosilicon, preparation method thereof, surfactant and polyurethane foam product

Abstract

The invention relates to the technical field of organic silicon surfactants, in particular to bio-based organic silicon and a preparation method thereof, a surfactant and a polyurethane foam product. The invention provides bio-based organic silicon which is selected from compounds shown in the following structural formula: # imgabs 0 #, a value of a is 5-55, a value of b is 1-10, a value of c is 0.2-3, a value of x is 10-40, a value of y is 1-15, R1 is selected from any one of groups shown in the following structural formula: # imgabs 1 #, n, m and q are any numerical values between 1 and 5, and R1 and R6 are respectively and independently selected from hydroxyl or alkenyl ether; r2, R3, R4, R5, R7, R8 and R9 are respectively and independently selected from C1-C5 alkyl groups. The bio-based organic silicon can be used for preparing polyurethane foam, the heat conductivity coefficient of the polyurethane foam can be reduced, the flow index of the polyurethane foam can be improved, and then the heat insulation performance and the flowing performance of the foam are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of organosilicon surfactants, and in particular to bio-based organosilicon and a preparation method thereof, a surfactant and a polyurethane foam product. Background Art

[0002] Silicone surfactants are often used as polyurethane foam stabilizers and play a key role in polyurethane foam production. They can reduce the surface tension of the system and make the foam uniform and delicate. On the one hand, they help the foaming process to proceed steadily and prevent the foam from collapsing or becoming uneven in size. On the other hand, they can adjust the open and closed cell structure of the foam. The stabilizer has good chemical stability and heat resistance and can adapt to different production process conditions. It is widely used in polyurethane soft foam, hard foam and other fields, such as the production of furniture cushions, thermal insulation materials, etc., effectively improving the quality and performance of polyurethane foam.

[0003] Generally speaking, the raw materials used in the production of polyurethane foam plastics mostly come from fossil-based materials such as petroleum, coal, and natural gas. Fossil-based materials have stable performance, are easy to process, have relatively low costs, and are easy to achieve standardized production. However, fossil-based materials are non-renewable resources and are gradually becoming exhausted. At the same time, the overexploitation and use of fossil resources have caused many problems such as energy depletion, climate change, and environmental pollution. Bio-based materials refer to new materials made from renewable biomass such as crops, trees, other plants, and their residues and contents as raw materials through biological, chemical, physical and other means. Bio-based materials are usually made from renewable resources, which reduces dependence on non-renewable resources and is beneficial to sustainable development. Secondly, bio-based materials are relatively easy to degrade in the natural environment, are more environmentally friendly, and can effectively reduce the environmental pollution pressure brought by traditional materials.

[0004] At present, a large number of studies are mainly focused on the preparation of bio-based polyether polyols to replace fossil-based polyether polyols, while there are few reports on the research work of polyurethane foam stabilizers. In view of this, under the development trend of bio-based materials replacing fossil-based materials, it is necessary to accelerate the development of green and environmentally friendly bio-based foam stabilizers to replace existing foam stabilizers, thereby reducing the use of fossil-based materials and reducing carbon emissions. At the same time, by introducing the unique structure of bio-based materials to improve their application performance, improve the quality of polyurethane foam, and meet the different application requirements of rigid polyurethane foam plastics.

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] The object of the present invention is to provide bio-based organosilicon and its preparation method, surfactant and polyurethane foam product. The bio-based organosilicon provided by the embodiment of the present invention can be used for the preparation of polyurethane foam, which can reduce the thermal conductivity of polyurethane foam, improve its flow index, and thus improve the thermal insulation performance and flow performance of the foam.

[0007] The present invention is achieved in that:

[0008] In a first aspect, the present invention provides a bio-based organosilicon selected from the compounds represented by the following structural formula:

[0009] Among them, the value of a is 5 to 55, the value of b is 1 to 10, the value of c is 0.2 to 3, the value of x is 10 to 40, the value of y is 1 to 15, and R 1 Any one selected from the groups shown in the following structural formulas:

[0010] Among them, n, m and q are any values ​​between 1 and 5, R 1 and R 6 R are independently selected from hydroxyl or alkenyl; 2 , R 3 , R 4 , R 5 , R 7 , R 8 and R 9 Each is independently selected from C1-C5 alkyl.

[0011] In an optional embodiment, n, m and q are any values ​​between 1 and 3; R 1 and R 6 are independently selected from hydroxyl, R 2 , R 3 , R 4 , R 5 , R 7 , R 8 and R 9 Each independently selected from C1-C3 alkyl;

[0012] Preferably, R 1 Any one selected from the groups shown in the following structural formulas:

[0013]

[0014] In a second aspect, the present invention provides a method for preparing the bio-based organosilicon described in the aforementioned embodiment, comprising: mixing and reacting hydrogen-containing polysiloxane, a bio-based substance, an allyl polyether and a catalyst.

[0015] In an optional embodiment, the method comprises: mixing the hydrogen-containing polysiloxane, the bio-based material, the allyl polyether and a chloroplatinic acid catalyst at 70-140° C. and reacting for 2-7 hours.

[0016] In an optional embodiment, the amount of the catalyst used is 5-30 ppm of the total mass of the raw materials for forming the bio-based organosilicon; preferably 8-20 ppm.

[0017] In an optional embodiment, the molar ratio of the hydrogen-containing polysiloxane, the allyl polyether and the bio-based substance is 1:(0.9-1.6):(0.3-0.8).

[0018] In an optional embodiment, the bio-based substance is selected from nerolidol and its derivatives, linalool and its derivatives.

[0019] In an optional embodiment, the preparation step of the hydrogen-containing polysiloxane comprises: using octamethylcyclotetrasiloxane, high hydrogen-containing silicone oil and hexamethyldisiloxane as raw materials, reacting at a reaction temperature of 20 to 90° C. for 2 to 8 hours under the action of an acidic substance;

[0020] Preferably, the hydrogen content of the high hydrogen silicone oil is 1.2-1.6%;

[0021] Preferably, the acidic substance includes concentrated sulfuric acid and acid clay;

[0022] Preferably, the amount of the acidic substance is 0.3-6% of the total mass of the raw materials for forming the hydrogen-containing polysiloxane; preferably 2-5%;

[0023] Preferably, the molar ratio of the octamethylcyclotetrasiloxane to the high hydrogen-containing silicone oil is 1:(0.1-0.35).

[0024] In a third aspect, the present invention provides a surfactant comprising the bio-based silicone described in the aforementioned embodiment.

[0025] In a fourth aspect, the present invention provides a polyurethane foam product, the raw materials of which include the bio-based silicone described in the aforementioned embodiment or the surfactant described in the aforementioned embodiment.

[0026] The present invention has the following beneficial effects: the bio-based organosilicon provided by the embodiment of the present invention uses polyether as the hydrophilic group, and then introduces the bio-based substance through an addition reaction, which adjusts the hydrophilicity and lipophilicity of the bio-based organosilicon to a certain extent, greatly improving its own surface activity, so that it can be used as a surfactant. At the same time, the introduction of the above-mentioned structure of bio-based organosilicon in the polyurethane foam production process can reduce the thermal conductivity of the polyurethane foam, improve its flow index, and thus improve the thermal insulation and flow properties of the foam. Moreover, the preparation method of the bio-based organosilicon is simple and easy to operate, and is very suitable for industrial production. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be described clearly and completely below. If the specific conditions are not specified in the embodiments, they are carried out according to conventional conditions or conditions recommended by the manufacturer. If the manufacturer of the reagents or instruments used is not specified, they are all conventional products that can be purchased commercially.

[0028] In a first aspect, the present invention provides a bio-based organosilicon selected from the compounds represented by the following structural formula:

[0029] Among them, the value of a is 5 to 55, the value of b is 1 to 10, the value of c is 0.2 to 3, the value of x is 10 to 40, the value of y is 1 to 15, and R 1 Any one selected from the groups shown in the following structural formulas: Among them, * represents R 1 The position connected to silicon, n, m and q are any values ​​between 1 and 5, R 1 and R 6 R are independently selected from hydroxyl or alkenyl; 2 , R 3 , R 4 , R 5 , R 7 , R 8 and R 9 Each is independently selected from C1-C5 alkyl.

[0030] Specifically, a is any value between 5 and 55, such as 5, 10, 15, 20, 25, 30, 35, 40, 45, 50 and 55. b is any value between 1 and 10, such as 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10. C is any value between 0.2 and 3, such as 0.2, 0.5, 1, 1.5, 2, 2.5 and 3. x is any value between 10 and 40, such as 10, 15, 20, 25, 30, 35 and 40. y is any value between 1 and 15, such as 1, 5, 10 and 15. n, m and q are any values ​​between 1 and 5, such as 1, 2, 3, 4 and 5, respectively. R 2 , R 3 , R 4 , R 5 , R 7 , R 8 and R 9 Each of them can be independently selected from an alkyl group such as methyl, ethyl, n-propyl, isopropyl, and n-butyl.

[0031] For example, R 1 Any one selected from the groups shown in the following structural formulas:

[0032]

[0033] In the prior art, polyurethane foam stabilizers are usually present as comb-shaped polyether silicone copolymers, in which siloxane acts as a hydrophobic group as the main chain, and polyether acts as a hydrophilic group as a side chain. The bio-based silicone provided by the present invention uses polyether as a hydrophilic group and then introduces bio-based substances through an addition reaction, which adjusts the hydrophilicity and lipophilicity of silicone to a certain extent and greatly improves its own surface activity. At the same time, this structure enables the bio-based silicone to reduce the thermal conductivity of polyurethane foam when preparing polyurethane foam, improve its flow index, and thus improve the thermal insulation and flow properties of the foam.

[0034] In a second aspect, the present invention provides a method for preparing the bio-based organosilicon described in the aforementioned embodiment, comprising:

[0035] S1, preparing hydrogen-containing polysiloxane;

[0036] Octamethylcyclotetrasiloxane, high hydrogen silicone oil and hexamethyldisiloxane are used as raw materials, reacted at a temperature of 20 to 90° C. for 2 to 8 hours under the action of an acidic substance, and the pH value is adjusted to obtain hydrogen-containing polysiloxane.

[0037] Specifically, the reaction temperature is any value between 20-90°C, such as 20°C, 30°C, 40°C, 50°C, 60°C, 70°C, 80°C and 90°C, and the reaction time is any value between 2-8 hours, such as 2 hours, 3 hours, 4 hours, 5 hours, 6 hours, 7 hours and 8 hours.

[0038] The hydrogen content of the high hydrogen silicone oil is 1.2%, 1.3%, 1.4%, 1.5%, 1.6% or any value between 1.2-1.6%.

[0039] The acidic substance includes but is not limited to concentrated sulfuric acid and acidic clay, and its usage is 0.3-6% of the total mass of the raw materials for forming the hydrogen-containing polysiloxane; for example, any value between 0.3%, 0.5%, 1%, 2%, 3%, 4%, 5% and 6%, for example, preferably 2-5%.

[0040] The molar ratio of octamethylcyclotetrasiloxane to the high hydrogen silicone oil is 1:(0.1-0.35).

[0041] S2, preparing bio-based silicone;

[0042] The hydrogen-containing polysiloxane, the bio-based material, the allyl polyether and the catalyst are mixed and reacted.

[0043] The reaction temperature is 70-140° C., for example, 70° C., 80° C., 90° C., 100° C., 110° C., 120° C., 130° C., 140° C., etc. The reaction time is 2 hours, 3 hours, 4 hours, 5 hours, 6 hours, 7 hours, etc., and any value between 2 and 7 hours.

[0044] The amount of the catalyst used is 5-30 ppm of the total mass of the raw materials for forming the bio-based organosilicon in S2, preferably 8-20 ppm. For example, it is any value between 5-30 ppm, such as 5 ppm, 10 ppm, 15 ppm, 20 ppm, 25 ppm and 30 ppm. For example, it is preferably 8-20 ppm.

[0045] The molar ratio of the hydrogen-containing polysiloxane, the allyl polyether and the bio-based substance is 1:(0.9-1.6):(0.3-0.8). For example, the molar ratio of the hydrogen-containing polysiloxane and the allyl polyether is any value between 1:(0.9-1.6) such as 1:0.9, 1:1, 1:1.2, 1:1.3, 1:1.4, 1:1.5, 1:1.6, etc., and the molar ratio of the hydrogen-containing polysiloxane and the bio-based substance is any value between 1:(0.3-0.8) such as 1:0.3, 1:0.4, 1:0.5, 1:0.6, 1:0.7, 1:0.8, etc.

[0046] The bio-based substance is selected from nerolidol and its derivatives, linalool and its derivatives.

[0047] The prepared bio-based silicone can be used as a surfactant, and then as a foam stabilizer in the foam production process to improve the performance of polyurethane foam.

[0048] In a third aspect, the present invention provides a surfactant comprising the bio-based silicone described in the aforementioned embodiment.

[0049] In a fourth aspect, the present invention provides a polyurethane foam product, the raw materials of which include the bio-based silicone described in the aforementioned embodiment or the surfactant described in the aforementioned embodiment.

[0050] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0051] Example 1

[0052] This embodiment provides a method for preparing bio-based organosilicon, comprising:

[0053] (1) Synthesis of hydrogen-containing polysiloxane:

[0054] Add 14.9 g of 1.5% hydrogen-containing high-hydrogen silicone oil, 154.5 g of tetramethylcyclotetrasiloxane, 10.6 g of hexamethyldisiloxane and 6.0 g of acid clay into a three-necked flask, heat to 65 °C, keep warm for 5 h, and use NaHCO 3 The pH is adjusted to about 7, and then filtered to obtain hydrogen-containing polysiloxane.

[0055] (2) Synthetic bio-based silicone:

[0056] 40g of the hydrogenated polysiloxane prepared above, 5.7g of nerolidol, 39.7g of allyl polyether (purchased from Jiangsu Zhongshan Chemical Co., Ltd.), and 10ppm of chloroplatinic acid catalyst were added to a reaction vessel, and heated to 110°C under normal pressure for 4 hours to obtain bio-based organosilicon. The structure of the bio-based organosilicon is as follows:

[0057] in,

[0058] Example 2

[0059] This embodiment provides a method for preparing bio-based organosilicon, comprising:

[0060] (1) Synthesis of hydrogen-containing polysiloxane:

[0061] Add 17.3 g of 1.5% hydrogen-containing high-hydrogen silicone oil, 153.9 g of tetramethylcyclotetrasiloxane, 8.8 g of hexamethyldisiloxane and 8 g of acid clay into a three-necked flask, heat to 85 °C, keep warm for 4 hours after the temperature stabilizes, and use NaHCO 3 The pH is adjusted to about 7, and then filtered to obtain hydrogen-containing polysiloxane.

[0062] (2) Synthetic bio-based silicone:

[0063] 40g of the hydrogenated polysiloxane prepared above, 8.3g of nerolidol, 47.3g of allyl polyether, and 12ppm of chloroplatinic acid catalyst were added to a reaction vessel, and heated to 100°C under normal pressure for 5 hours to obtain bio-based organosilicon. The structure of the bio-based organosilicon is as follows:

[0064]

[0065] in

[0066] Example 3

[0067] This embodiment provides a method for preparing bio-based organosilicon, comprising:

[0068] (1) Synthesis of hydrogen-containing polysiloxane:

[0069] Add 31.3 g of 1.5% hydrogen-containing high-hydrogen silicone oil, 139.1 g of tetramethylcyclotetrasiloxane, 9.5 g of hexamethyldisiloxane and 1.2 g of concentrated sulfuric acid into a three-necked flask, heat to 40 °C, and keep the temperature for 6 h after the temperature stabilizes. 3 The pH is adjusted to about 7, and then filtered to obtain hydrogen-containing polysiloxane.

[0070] (2) Synthetic bio-based silicone:

[0071] 40g of the hydrogenated polysiloxane prepared above, 10.0g of nerolidol, 116.4g of allyl polyether, and 15ppm of chloroplatinic acid catalyst were added to a reaction vessel, and heated to 110°C under normal pressure for 6 hours to obtain bio-based organosilicon. The structure of the bio-based organosilicon is as follows:

[0072]

[0073] in

[0074] Example 4

[0075] This embodiment provides a method for preparing bio-based organosilicon, comprising:

[0076] (1) Synthesis of hydrogen-containing polysiloxane:

[0077] Add 14.2g of 1.5% high hydrogen silicone oil, 160.4g of tetramethylcyclotetrasiloxane, 5.5g of hexamethyldisiloxane and 1.2g of concentrated sulfuric acid into a three-necked flask, heat to 50°C, keep warm for 6h after the temperature stabilizes, and add NaHCO 3 The pH is adjusted to about 7, and then filtered to obtain hydrogen-containing polysiloxane.

[0078] (2) Synthetic bio-based silicone:

[0079] 40g of the hydrogenated polysiloxane prepared above, 4.1g of nerolidol, 52.8g of allyl polyether, and 12ppm of chloroplatinic acid catalyst were added to a reaction container, and heated to 100°C under normal pressure for 5 hours to obtain bio-based organosilicon. The structure of the bio-based organosilicon is as follows:

[0080]

[0081] in

[0082] Example 5

[0083] This embodiment provides a method for preparing bio-based organosilicon, comprising:

[0084] (1) Synthesis of hydrogen-containing polysiloxane:

[0085] Add 22.1 g of 1.5% hydrogen-containing high-hydrogen silicone oil, 151.2 g of tetramethylcyclotetrasiloxane, 6.8 g of hexamethyldisiloxane and 7 g of acid clay into a three-necked flask, heat to 85 °C, keep warm for 5 hours after the temperature stabilizes, and use NaHCO 3 The pH is adjusted to about 7, and then filtered to obtain hydrogen-containing polysiloxane.

[0086] (2) Synthetic bio-based silicone:

[0087] 40 g of the hydrogenated polysiloxane prepared above, 7.4 g of linalool, 51.1 g of allyl polyether, and 9 ppm of chloroplatinic acid catalyst were added to a reaction vessel, and heated to 130° C. at normal pressure for 4 hours to obtain bio-based organosilicon. The structure of the bio-based organosilicon is as follows:

[0088]

[0089] in

[0090] Example 6

[0091] This embodiment provides a method for preparing bio-based organosilicon, comprising:

[0092] (1) Synthesis of hydrogen-containing polysiloxane:

[0093] Add 24.1 g of 1.5% hydrogen-containing high-hydrogen silicone oil, 151.8 g of tetramethylcyclotetrasiloxane, 4.1 g of hexamethyldisiloxane and 1.5 g of concentrated sulfuric acid into a three-necked flask, heat to 40 °C, keep warm for 7 hours after the temperature stabilizes, and add NaHCO 3 The pH is adjusted to about 7, and then filtered to obtain hydrogen-containing polysiloxane.

[0094] (2) Synthetic bio-based silicone:

[0095] 40 g of the hydrogenated polysiloxane prepared above, 3.2 g of linalool, 85.6 g of allyl polyether, and 11 ppm of chloroplatinic acid catalyst were added to a reaction vessel, and heated to 110° C. at normal pressure for 6 hours to obtain bio-based organosilicon. The structure of the bio-based organosilicon is as follows:

[0096]

[0097] in

[0098] Example 7

[0099] This embodiment provides a method for preparing bio-based organosilicon, comprising:

[0100] (1) Synthesis of hydrogen-containing polysiloxane:

[0101] Add 12.9 g of 1.5% hydrogen-containing high-hydrogen silicone oil, 160.6 g of tetramethylcyclotetrasiloxane, 6.5 g of hexamethyldisiloxane and 1.6 g of concentrated sulfuric acid into a three-necked flask, heat to 45 °C, keep warm for 7 hours after the temperature stabilizes, and add NaHCO 3 The pH is adjusted to about 7, and then filtered to obtain hydrogen-containing polysiloxane.

[0102] (2) Synthetic bio-based silicone:

[0103] 40 g of the hydrogenated polysiloxane prepared above, 2.6 g of linalool, 32.0 g of allyl polyether, and 13 ppm of chloroplatinic acid catalyst were added to a reaction vessel, and heated to 115° C. at normal pressure for 5 hours to obtain bio-based organosilicon. The structure of the bio-based organosilicon is as follows:

[0104]

[0105] in

[0106] Example 8

[0107] This embodiment provides a method for preparing bio-based organosilicon, comprising:

[0108] (1) Synthesis of hydrogen-containing polysiloxane:

[0109] Add 20.7 g of 1.5% hydrogen-containing high-hydrogen silicone oil, 154.2 g of tetramethylcyclotetrasiloxane, 5.1 g of hexamethyldisiloxane and 9 g of acid clay into a three-necked flask, heat to 65 °C, keep warm for 5 hours after the temperature stabilizes, and use NaHCO 3 The pH is adjusted to about 7, and then filtered to obtain hydrogen-containing polysiloxane.

[0110] (2) Synthetic bio-based silicone:

[0111] 40 g of the hydrogenated polysiloxane prepared above, 6.0 g of linalool, 58.2 g of allyl polyether, and 14 ppm of chloroplatinic acid catalyst were added to a reaction vessel, and heated to 105° C. at normal pressure for 5 hours to obtain bio-based organosilicon. The structure of the bio-based organosilicon is as follows:

[0112]

[0113] in

[0114] Comparative Example 1

[0115] This comparative example provides a method for preparing organosilicon, comprising:

[0116] (1) Synthesis of hydrogen-containing polysiloxane:

[0117] The hydrogen-containing polysiloxane was synthesized in the same manner as in Example 1.

[0118] (2) Synthetic silicone:

[0119] 40.0 g of the hydrogen-containing polysiloxane prepared above, 94.7 g of terminal allyl polyether, and 10 ppm of chloroplatinic acid catalyst were added to a three-necked flask, and the temperature was raised to 105° C. under normal pressure for 3 hours to obtain organosilicon, the structure of which is as follows:

[0120]

[0121] Comparative Example 2

[0122] This comparative example provides a method for preparing organosilicon, comprising:

[0123] (1) Synthesis of hydrogen-containing polysiloxane:

[0124] The hydrogen-containing polysiloxane was synthesized in the same manner as in Example 2.

[0125] (2) Synthetic silicone:

[0126] 40.0 g of the hydrogen-containing polysiloxane prepared above, 127.6 g of terminal allyl polyether, and 8 ppm of chloroplatinic acid catalyst were added to a three-necked flask, and the temperature was raised to 115° C. under normal pressure for 4 hours to obtain organosilicon, the structure of which is as follows:

[0127]

[0128] Comparative Example 3

[0129] This comparative example provides a method for preparing organosilicon, comprising:

[0130] (1) Synthesis of hydrogen-containing polysiloxane:

[0131] The hydrogen-containing polysiloxane was synthesized in the same manner as in Example 4.

[0132] (2) Synthetic silicone:

[0133] 40g of the hydrogenated polysiloxane prepared above, 10.9g of nerolidol, 15.1g of allyl polyether, and 12ppm of chloroplatinic acid catalyst were added to a reaction vessel, and heated to 100°C under normal pressure for 5 hours to obtain organosilicon. The organosilicon structure is as follows:

[0134]

[0135] in

[0136] Comparative Example 4

[0137] This comparative example provides a method for preparing organosilicon, comprising:

[0138] (1) Synthesis of hydrogen-containing polysiloxane:

[0139] The hydrogen-containing polysiloxane was synthesized in the same manner as in Example 5.

[0140] (2) Synthetic silicone:

[0141] 40 g of the hydrogenated polysiloxane prepared above, 11.8 g of linalool, 20.4 g of allyl polyether, and 15 ppm of chloroplatinic acid catalyst were added to a reaction vessel, and heated to 130° C. at normal pressure for 4 hours to obtain organosilicon. The organosilicon structure is as follows:

[0142]

[0143] in

[0144] Comparative Example 5

[0145] This comparative example provides a method for preparing organosilicon, comprising:

[0146] (1) Synthesis of hydrogen-containing polysiloxane:

[0147] The hydrogen-containing polysiloxane was synthesized in the same manner as in Example 3.

[0148] (2) Synthetic silicone:

[0149] 40g of the hydrogenated polysiloxane prepared above, 3.0g of nerolidol, 157.1g of allyl polyether, and 13ppm of chloroplatinic acid catalyst were added to a reaction vessel, and heated to 110°C under normal pressure for 5 hours to obtain organosilicon. The organosilicon structure is as follows:

[0150]

[0151] in

[0152] Comparative Example 6

[0153] (1) Synthesis of hydrogen-containing polysiloxane:

[0154] The hydrogen-containing polysiloxane was synthesized in the same manner as in Example 6.

[0155] (2) Synthetic silicone:

[0156] 40 g of the hydrogenated polysiloxane prepared above, 1.6 g of linalool, 96.3 g of allyl polyether, and 12 ppm of chloroplatinic acid catalyst were added to a reaction vessel, and heated to 120° C. at normal pressure for 5 hours to obtain organosilicon. The organosilicon structure is as follows:

[0157]

[0158] in

[0159] Experimental Example 1

[0160] The silicones of Examples 1-8 and Comparative Examples 1-6 were used to prepare polyurethane foam products, and their flow properties were tested. The formulas are shown in Table 1 below, and the test results are shown in Table 2.

[0161] Table 1 Recipe

[0162]

[0163]

[0164] Table 2 Test results

[0165] Foam height / cm Foam mass / g Flow index (cm / g) Example 1 136.8 356.2 0.3841 Example 2 136.7 356.2 0.3838 Example 3 136.9 355.1 0.3855 Example 4 136.6 356.2 0.3835 Example 5 136.5 356.1 0.3833 Example 6 136.7 356.1 0.3839 Example 7 137.1 356.4 0.3847 Example 8 136.9 356.2 0.3843 Comparative Example 1 135.3 356.1 0.3799 Comparative Example 2 135.4 356.1 0.3802 Comparative Example 3 135.78 356.2 0.3812 Comparative Example 4 135.8 356.5 0.3809 Comparative Example 5 133.9 355.8 0.3763 Comparative Example 6 132.8 356.2 0.3728

[0166] According to Table 2, when the polyurethane foam is prepared using silicone that is not provided in the embodiments of the present invention, the polyurethane foam has poor flowability and a low flow index, while when the polyurethane foam is prepared using the bio-based silicone synthesized by the present invention as a surfactant, the polyurethane foam has good flowability and a higher flow index.

[0167] Experimental Example 2

[0168] The silicones of Examples 1-8 and Comparative Examples 1-6 were used to prepare rigid polyurethane foam products, the formulations of which are shown in Table 3 below. The material compositions of the formulations were mixed, stirred at 6000 r / min, and poured into a standard mold (mold temperature 25° C.) without free foaming, to prepare polyurethane foam.

[0169] Table 3 Rigid polyurethane foam formula

[0170] Components Weight fraction Polyol 4110 70 servings Polyol 635 30 servings water 1.5 servings PC-8 2.0 copies DMP-30 1.2 servings Examples or Comparative Examples Silicone 3.0 copies Cyclopentane 13 servings Black material: White material 120:100

[0171] The rigid polyurethane or isocyanate foam obtained above was subjected to performance tests, and the results are shown in Table 4, wherein the thermal conductivity (λ) was determined according to GB / T 10295-2008 Determination of steady-state thermal resistance and related properties of thermal insulation materials, and the closed-cell content was determined according to GB / T 10799-2008 Determination of volume percentage of open and closed cells in rigid foam plastics.

[0172] Table 4 Test results

[0173]

[0174] According to Table 4, in the process of preparing rigid polyurethane foam, the polyurethane foam prepared by using the silicone not provided by the embodiment of the present invention as a surfactant has poor thermal insulation performance and a low closed cell rate, while the polyurethane foam prepared by using the synthetic bio-based silicone provided by the embodiment of the present invention as a surfactant has good thermal insulation performance and a higher closed cell rate.

[0175] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A bio-based organosilicon, characterized in that: It is selected from the compounds represented by the following structural formula: Wherein, the value of a is 5 to 55, the value of b is 1 to 10, the value of c is 0.2 to 3, the value of x is 10 to 40, the value of y is 1 to 15, and R1 is selected from any one of the groups shown in the following structural formulas: Wherein, n, m and q are any values ​​between 1 and 5, R1 and R6 are independently selected from hydroxyl or ether group; R2, R3, R4, R5, R7, R8 and R9 are independently selected from C1-C5 alkyl group.

2. The bio-based organosilicon according to claim 1, characterized in that n, m and q are any values ​​between 1 and 3; R1 and R6 are independently selected from hydroxyl groups, and R2, R3, R4, R5, R7, R8 and R9 are independently selected from C1-C3 alkyl groups; Preferably, R1 is selected from any one of the groups represented by the following structural formulas:

3. A method for preparing the bio-based organosilicon according to claim 1, characterized in that: include: The hydrogen-containing polysiloxane, the bio-based material, the allyl polyether and the catalyst are mixed and reacted.

4. The preparation method according to claim 3, characterized in that: include: The hydrogen-containing polysiloxane, the bio-based material, the allyl polyether and the chloroplatinic acid catalyst are mixed at 70-140° C. and reacted for 2-7 hours.

5. The preparation method according to claim 3 or 4, characterized in that: The amount of the catalyst used is 5-30 ppm of the total mass of the raw materials for forming the bio-based organosilicon, preferably 8-20 ppm.

6. The preparation method according to claim 3 or 4, characterized in that: The molar ratio of the hydrogen-containing polysiloxane, the allyl polyether and the bio-based substance is 1:(0.9-1.6):(0.3-0.8).

7. The preparation method according to claim 3 or 4, characterized in that: The bio-based substance is selected from nerolidol and its derivatives, linalool and its derivatives.

8. The preparation method according to claim 3 or 4, characterized in that: The preparation steps of the hydrogen-containing polysiloxane include: using octamethylcyclotetrasiloxane, high hydrogen-containing silicone oil and hexamethyldisiloxane as raw materials, reacting them under the action of an acidic substance at a reaction temperature of 20 to 90° C. for 2 to 8 hours; Preferably, the hydrogen content of the high hydrogen silicone oil is 1.2-1.6%; Preferably, the acidic substance includes concentrated sulfuric acid and acid clay; Preferably, the amount of the acidic substance is 0.3-6% of the total mass of the raw materials for forming the hydrogen-containing polysiloxane; preferably 2-5%; Preferably, the molar ratio of the octamethylcyclotetrasiloxane to the high hydrogen-containing silicone oil is 1:(0.1-0.35).

9. A surfactant, characterized in that It comprises the bio-based silicone as claimed in claim 1.

10. A polyurethane foam product, characterized in that: The raw materials include the bio-based organosilicon described in claim 1 or the surfactant described in claim 9.

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