CN115028797A - Organic silicon modified polyurethane elastomer and preparation method thereof - Google Patents
Organic silicon modified polyurethane elastomer and preparation method thereof Download PDFInfo
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Abstract
The invention belongs to the technical field of polyurethane elastomers, and particularly relates to an organic silicon modified polyurethane elastomer and a preparation method thereof. The feed comprises the following raw materials in parts by weight: 10-30 parts of organic montmorillonite, 20-50 parts of organic silicon diol, 60-100 parts of polyether polyol, 55-90 parts of toluene diisocyanate, 15-32 parts of poly-caprolactone diol, 10-26 parts of modified polysiloxane, 1-3 parts of chain extender, 0.4-2 parts of cross-linking agent and 3-10 parts of curing agent. The organic silicon glycol is connected into the polyurethane, so that the heat resistance, the hydrophobicity and the hardness of polyurethane molecules are improved, the added organic montmorillonite can be composited with the polyurethane in a nano-scale, a strong acting force is exerted between the organic montmorillonite and the polyurethane, and a polyurethane molecular chain inserted between montmorillonite layers can be subjected to the blocking effect and the limiting effect of the montmorillonite layers, so that the heat resistance, the tensile strength and the elongation at break of the material are improved, the polyurethane, the organic silicon and the montmorillonite are combined, the advantages can be complemented, and the material with the excellent performances of the polyurethane, the organic silicon and the montmorillonite can be prepared.
Description
Technical Field
The invention belongs to the technical field of polyurethane elastomers, and particularly relates to an organic silicon modified polyurethane elastomer and a preparation method thereof.
Background
Polyurethane elastomers are a series of elastomeric materials containing urethane groups and/or isocyanates in the polymer backbone. The polymer chain contains, in addition to the above-mentioned groups, (carboxylic) ester groups, ether bonds, urea groups, aromatic groups, aliphatic chains, and the like, and is generally obtained by reacting an oligomer polyol, a polyisocyanate, and a chain extender. The elastic modulus of the polyurethane elastomer is between that of rubber and plastic, and the polyurethane elastomer has the greatest advantage of high elasticity. The polyurethane elastomer also has good solvent resistance, abrasion resistance and flexure resistance. Polyurethane elastomers are roughly classified into polyester type and polyether type.
Because the polyurethane elastomer has large heat generation in the body and is not high temperature resistant, the development of the polyurethane elastomer in the industrial field is greatly limited, and therefore, the polyurethane elastomer is one of the hot spots of the current research on how to improve the heat resistance of the polyurethane elastomer.
Disclosure of Invention
In order to solve the above problems in the prior art, the present invention provides an organosilicon-modified polyurethane elastomer and a preparation method thereof.
An organosilicon modified polyurethane elastomer comprises the following raw materials in parts by weight: 10-30 parts of organic montmorillonite, 20-50 parts of organic silicon diol, 60-100 parts of polyether polyol, 55-90 parts of toluene diisocyanate, 15-32 parts of poly-caprolactone diol, 10-26 parts of modified polysiloxane, 1-3 parts of chain extender, 0.4-2 parts of cross-linking agent and 3-10 parts of curing agent.
Preferably, the feed comprises the following raw materials in parts by weight: 20 parts of organic montmorillonite, 35 parts of organic silicon diol, 80 parts of polyether polyol, 78 parts of toluene diisocyanate, 23.5 parts of poly-caprolactone diol, 18 parts of modified polysiloxane, 2 parts of chain extender, 1.2 parts of cross-linking agent and 6.5 parts of curing agent.
Preferably, the organic montmorillonite is prepared by the following method: mixing sodium montmorillonite dispersed in water with dioctadecyl dimethyl ammonium chloride dispersed in absolute ethyl alcohol, stirring at 75-85 ℃, and then filtering and drying to obtain the organic montmorillonite.
Preferably, the preparation method of the modified polysiloxane comprises the following steps:
and (2) mixing the following components in percentage by mass: (1-1.5) mixing toluene diisocyanate and acetone, introducing N2, adding glycolic acid into the mixture at room temperature, reacting for 1-1.5h, heating to 60-70 ℃, adding 2-4 drops of catalyst, and continuing to react for 2.5-3h to obtain a hydroxyl-terminated carbamate modifier;
octamethylcyclotetrasiloxane, aminopropyl methyl dimethoxysilane, hydroxyl silicone oil and potassium hydroxide are mixed, stirred for 6-7h at the temperature of 150-160 ℃ for equilibrium reaction, and then low-boiling-point substances are extracted at the temperature of 140-150 ℃ and the pressure of 0.67-0.72kPa to obtain hydroxyl-terminated poly-aminosilane;
the hydroxyl terminated polyaminosilanes are mixed with a hydroxyl terminated urethane modifier to obtain the modified polysiloxane.
Preferably, the mass ratio of the octamethylcyclotetrasiloxane to the aminopropylmethyldimethoxysilane to the hydroxy silicone oil to the potassium hydroxide is 1.6: 0.7: 1.3: 0.2.
preferably, the curing agent is one or more of triethylene diamine, bis (N, N-dimethylaminoethyl) amine and di-thiophenyltoluene diamine.
Preferably, the cross-linking agent comprises trimethylolpropane and tetraethoxysilane, and the mass ratio of the trimethylolpropane to the tetraethoxysilane is 1: 1.3.
preferably, the chain extender is one or more of polybutylene terephthalate, polyethylene terephthalate and polyethylene terephthalate-1, 4-cyclohexanedimethanol ester.
A preparation method of an organosilicon modified polyurethane elastomer comprises the following steps:
s1: dehydrating the poly-caprolactone diol to obtain a sample A; adding organic silicon diol into toluene diisocyanate, reacting at 80-90 ℃ for 2-3h, and cooling to 40-60 ℃ to obtain a sample B; adding the sample A into the sample B in three times in equal amount, heating to 80-85 ℃ after natural temperature rise, reacting for 2-3h, and defoaming to obtain a polyamino acid prepolymer;
s2: stirring and mixing organic montmorillonite and polyether polyol, and grinding to obtain a polyether polyol intercalated montmorillonite compound;
and S3, adding a chain extender into the polyurethane prepolymer, stirring and mixing, adding the polyether polyol intercalated montmorillonite composite, and stirring and mixing at room temperature for 4-5 hours. And adding modified polysiloxane and a cross-linking agent for mixing, adding a curing agent for uniformly mixing, defoaming in vacuum, and curing to obtain the organic silicon modified polyurethane elastomer.
Preferably, the polyether polyol in the S2 is mixed by mass ratio of 1: polyether diols and polyether triols of (1.2-1.8).
Compared with the prior art, the invention has the beneficial effects that:
1. by incorporating the organosilicone diol molecules into the polyurethane molecules, the heat resistance, hydrophobicity, and hardness properties of the polyurethane molecules are improved. The organosilicon diol migrates to the surface of polyurethane molecules, and the low surface tension of the organosilicon diol improves the hydrophobic property of the polyurethane; meanwhile, the addition of the organic silicon glycol relatively reduces the content of the hard end of the system, reduces the melting temperature, increases the incompatibility between soft and hard sections, and increases the microphase separation of the system and the hardness of the material by adding the incompatibility between the soft section of the organic silicon glycol and the soft section of the polycaprolactone.
2. Adding organic montmorillonite, which is typically 2: the 1-layer phyllosilicate structure can be compounded with polyurethane in a nano-scale mode, strong interaction force exists between the 1-layer phyllosilicate structure and the polyurethane, and polyurethane molecular chains entering the montmorillonite layers can be subjected to the blocking effect and the limiting effect of the montmorillonite layers, so that the heat resistance, the tensile strength and the elongation at break of the composite material are improved.
3. Polysiloxane is modified, so that the compatibility of polysiloxane and polyurethane is effectively improved while side chains are increased, the phase separation degree is reduced, the damping property and the heat resistance of the material are improved, and the stability of the material is improved; the isocyanate hard segment is introduced into a polysiloxane chain, and the network interpenetration is carried out through crosslinking polymerization to prepare the modified polysiloxane, so that the networks among the components are well interpenetrated and entangled, a certain degree of microphase separation exists, and the damping performance of the material can be improved.
Detailed Description
The invention is further described with reference to specific examples.
Source of raw materials
Toluene diisocyanate, designation WANNATE TDI-80, available from Waals chemical;
polyether diol 400 and polyether triol 330N are both from Shandong Daihai chemical industry Co.Ltd;
poly-caprolactone diol, number average molecular weight 1000, available from shandong norway polyurethane gmbh;
silicone glycol, number average molecular weight 2000 from wacker chemistry;
the organic montmorillonite in the embodiment of the invention is prepared by the following method:
weighing 4 parts by weight of sodium montmorillonite, dispersing in 96 parts by weight of deionized water, stirring at a high speed for 0.5h, simultaneously dissolving 5 parts by weight of dioctadecyl dimethyl ammonium chloride in 20 parts by weight of absolute ethyl alcohol, adding the mixture into a mixed solution of sodium montmorillonite and water, stirring at a high speed for 8h at 75 ℃, filtering, drying at 100 ℃ in vacuum to constant weight, grinding into powder with the particle size not smaller than 300 meshes, and obtaining the organic montmorillonite.
The modified polysiloxane in the embodiment of the invention is prepared by the following method:
weighing 20 parts by weight of toluene diisocyanate and 15 parts by weight of acetone, adding the toluene diisocyanate and the acetone into a new reactor, introducing nitrogen for protection, slowly dropwise adding glycolic acid into the reactor at room temperature, reacting for 1 hour, heating to 60 ℃, adding 0.5 part of dibutyltin dilaurate catalyst, and continuously reacting for 2.5 hours to obtain a hydroxyl-terminated carbamate modifier for later use; weighing 1.6 parts of octamethylcyclotetrasiloxane, 0.7 part of aminopropylmethyldimethoxysilane, 1.3 parts of hydroxyl silicone oil and 0.2 part of potassium hydroxide, adding into a stirrer, stirring at 150 ℃ for 6 hours to carry out equilibration reaction, then extracting low-boiling-point substances at 140 ℃ and 0.67kPa to obtain hydroxyl-terminated polyamino silane for later use, and then fully mixing the hydroxyl-terminated polyamino silane with a hydroxyl-terminated carbamate modifier to obtain the modified polysiloxane.
Example 1
An organic silicon modified polyurethane elastomer comprises the following raw materials in parts by weight: 20 parts of organic montmorillonite, 35 parts of organic silicon diol, 80 parts of polyether polyol, 78 parts of toluene diisocyanate, 23.5 parts of poly-caprolactone diol, 18 parts of modified polysiloxane, 2 parts of chain extender, 1.2 parts of cross-linking agent and 6.5 parts of curing agent, wherein the polyether polyol is prepared from the following components in parts by mass: 1.5 polyether diols and polyether triols; the curing agent is di-thio-toluenediamine; the cross-linking agent is prepared from the following components in a mass ratio of 1: 1.3 of a mixture of trimethylolpropane and ethyl orthosilicate; the chain extender is polybutylene terephthalate.
A preparation method of an organic silicon modified polyurethane elastomer comprises the following specific preparation steps:
the method comprises the following steps: weighing poly-caprolactone diol, adding the poly-caprolactone diol into a reaction container, dehydrating for 2 hours at the temperature of 100 ℃ and under the pressure of 0.6kPa, and then cooling to 40 ℃ to obtain a sample A for later use; weighing toluene diisocyanate, adding the toluene diisocyanate into a new reaction container, adding organic silicon glycol, heating to 80 ℃, then carrying out heat preservation reaction for 2 hours, and then cooling to 40 ℃ to obtain a sample B for later use; adding the sample A obtained by the treatment into the sample B in three times with equal amount, heating to 80 ℃ after the natural temperature rise is finished, preserving the heat, reacting for 2 hours, and defoaming to obtain a polyamino acid prepolymer;
step two: adding organic montmorillonite into a stirrer, adding polyether polyol, stirring and mixing, and grinding to obtain a polyether polyol intercalated montmorillonite compound;
step three: preheating the polyamino acid prepolymer obtained in the step one at 70 ℃ for 5min, adding a chain extender which is heated to be molten, stirring for 3min, then adding the polyether polyol intercalated montmorillonite compound obtained in the step two, stirring and mixing for 4h at room temperature, then adding modified polysiloxane and a crosslinking agent, mixing, then adding a curing agent, uniformly stirring, pouring into a mold, defoaming in vacuum, and curing for 20h in a constant-temperature oven at 90 ℃ to obtain the organic silicon modified polyurethane elastomer.
Example 2
An organosilicon modified polyurethane elastomer comprises the following raw materials in parts by weight: 30 parts of organic montmorillonite, 50 parts of organic silicon diol, 100 parts of polyether polyol, 90 parts of toluene diisocyanate, 32 parts of poly-caprolactone diol, 26 parts of modified polysiloxane, 1 part of catalyst, 3 parts of chain extender, 2 parts of cross-linking agent and 10 parts of curing agent, wherein the polyether polyol is prepared from the following components in parts by mass: 1.2 polyether diols and polyether triols; the curing agent is a mixture of triethylene diamine and di (N, N-dimethylaminoethyl) amine, and the weight ratio of triethylene diamine to di (N, N-dimethylaminoethyl) amine is 1: 1, mixing; the cross-linking agent is prepared from the following components in a mass ratio of 1: 1.3 of a mixture of trimethylolpropane and ethyl orthosilicate; the chain extender is polybutylene terephthalate.
A preparation method of an organic silicon modified polyurethane elastomer comprises the following specific preparation steps:
the method comprises the following steps: weighing poly-caprolactone diol, adding the poly-caprolactone diol into a reaction container, dehydrating for 2 hours at the temperature of 100 ℃ and under the pressure of 0.6kPa, and then cooling to 40 ℃ to obtain a sample A for later use; weighing toluene diisocyanate, adding the toluene diisocyanate into a new reaction container, adding organic silicon glycol, heating to 90 ℃, then carrying out heat preservation reaction for 3 hours, and then cooling to 60 ℃ to obtain a sample B for later use; adding the sample A obtained by the treatment into the sample B in three times with equal amount, heating to 80 ℃ after the natural temperature rise is finished, and carrying out heat preservation reaction for 2.5 hours to obtain a polyamino acid prepolymer after defoaming;
step two: adding organic montmorillonite into a stirrer, adding polyether polyol, stirring and mixing, and grinding to obtain a polyether polyol intercalated montmorillonite compound;
step three: preheating the polyamino acid prepolymer obtained in the step one at 70 ℃ for 5min, adding a chain extender which is heated to be molten, stirring for 3min, then adding the polyether polyol intercalated montmorillonite compound obtained in the step two, stirring and mixing for 4.5h at room temperature, then adding modified polysiloxane and a crosslinking agent, adding a curing agent after mixing, pouring the mixture into a mold after uniformly stirring, defoaming in vacuum, and curing for 20h in a constant-temperature oven at 90 ℃ to obtain the organic silicon modified polyurethane elastomer.
Example 3
An organic silicon modified polyurethane elastomer comprises the following raw materials in parts by weight: 10 parts of organic montmorillonite, 20 parts of organic silicon diol, 60 parts of polyether polyol, 75 parts of toluene diisocyanate, 15 parts of poly-caprolactone diol, 10 parts of modified polysiloxane, 1 part of chain extender, 0.4 part of cross-linking agent and 3 parts of curing agent, wherein the polyether polyol is prepared from the following components in parts by mass: 1.5 polyether diols and polyether triols; the curing agent is di-thio-toluenediamine; the cross-linking agent is prepared from the following components in a mass ratio of 1: 1.3 of a mixture of trimethylolpropane and ethyl orthosilicate; the chain extender is polyethylene terephthalate.
A preparation method of an organic silicon modified polyurethane elastomer comprises the following specific preparation steps:
the method comprises the following steps: weighing poly-caprolactone diol, adding the poly-caprolactone diol into a reaction container, dehydrating for 2 hours at the temperature of 100 ℃ and under the pressure of 0.6kPa, and then cooling to 40 ℃ to obtain a sample A for later use; weighing toluene diisocyanate, adding the toluene diisocyanate into a new reaction container, adding organic silicon glycol, heating to 85 ℃, then carrying out heat preservation reaction for 2.5 hours, and then cooling to 50 ℃ to obtain a sample B for later use; adding the sample A obtained by the treatment into the sample B in three times with equal amount, heating to 85 ℃ after the natural temperature rise is finished, preserving heat, reacting for 3 hours, and defoaming to obtain a polyamino acid prepolymer;
step two: adding organic montmorillonite into a stirrer, adding polyether polyol, stirring and mixing, and grinding to obtain a polyether polyol intercalated montmorillonite compound;
step three: preheating the polyamino acid prepolymer obtained in the step one at 70 ℃ for 5min, adding a chain extender which is heated to be molten, stirring for 3min, then adding the polyether polyol intercalated montmorillonite compound obtained in the step two, stirring and mixing for 5h at room temperature, then adding modified polysiloxane and a crosslinking agent, adding a curing agent after mixing, pouring the mixture into a mold after uniformly stirring, defoaming in vacuum, and curing for 20h in a constant-temperature oven at 90 ℃ to obtain the organic silicon modified polyurethane elastomer.
Example 4
An organosilicon modified polyurethane elastomer comprises the following raw materials in parts by weight: 20 parts of organic montmorillonite, 35 parts of organic silicon diol, 80 parts of polyether polyol, 78 parts of toluene diisocyanate, 23.5 parts of poly-caprolactone diol, 18 parts of polysiloxane, 2 parts of chain extender, 1.2 parts of cross-linking agent and 6.5 parts of curing agent, wherein the polyether polyol is prepared from the following components in parts by mass: 1.5 polyether diols and polyether triols; the curing agent is di-thio-toluenediamine; the cross-linking agent is prepared from the following components in a mass ratio of 1: 1.3 of a mixture of trimethylolpropane and ethyl orthosilicate; the chain extender is polybutylene terephthalate.
A preparation method of an organic silicon modified polyurethane elastomer comprises the following specific preparation steps:
the method comprises the following steps: weighing poly-caprolactone diol, adding the poly-caprolactone diol into a reaction container, dehydrating for 2 hours at the temperature of 100 ℃ and under the pressure of 0.6kPa, and then cooling to 40 ℃ to obtain a sample A for later use; weighing toluene diisocyanate, adding the toluene diisocyanate into a new reaction container, adding organic silicon glycol, heating to 80 ℃, then carrying out heat preservation reaction for 2 hours, and then cooling to 40 ℃ to obtain a sample B for later use; adding the sample A obtained by the treatment into the sample B in three times with equal amount, heating to 80 ℃ after the natural temperature rise is finished, preserving the heat, reacting for 2 hours, and defoaming to obtain a polyamino acid prepolymer;
step two: adding organic montmorillonite into a stirrer, adding polyether polyol, stirring and mixing, and grinding to obtain a polyether polyol intercalated montmorillonite compound;
step three: weighing the components in a mass ratio of 1.6: 0.7: 1.3: 0.2 of octamethylcyclotetrasiloxane, aminopropyl methyl dimethoxysilane, hydroxyl silicone oil and potassium hydroxide are added into a stirrer, stirred for 6 hours at the temperature of 150 ℃ for equilibrium reaction, and then low-boiling-point substances are extracted at the temperature of 140 ℃ and the pressure of 0.67kPa to obtain hydroxyl-terminated polyamino silane.
Step four: preheating the polyamino acid prepolymer obtained in the step one at 70 ℃ for 5min, adding a chain extender which is heated to be molten, stirring for 3min, then adding the polyether polyol intercalated montmorillonite compound obtained in the step two, stirring and mixing for 4h at room temperature, adding hydroxyl polyamino silane and a crosslinking agent, adding a curing agent after mixing, pouring the mixture into a mold after uniformly stirring, defoaming in vacuum, and curing for 20h in a constant-temperature oven at 90 ℃ to obtain the organic silicon modified polyurethane elastomer.
Example 5
The present embodiment is different from embodiment 1 in that: no silicone diol was added.
Example 6
The present embodiment is different from embodiment 1 in that: organic montmorillonite and organic silicon glycol are not added.
Example 7
An organic silicon modified polyurethane elastomer comprises the following raw materials in parts by weight: 78 parts of toluene diisocyanate, 23.5 parts of poly-caprolactone diol, 0.5 part of catalyst and 2 parts of chain extender.
The invention also provides a preparation method of the organic silicon modified polyurethane elastomer, which comprises the following specific preparation steps:
the method comprises the following steps: weighing toluene diisocyanate, adding the toluene diisocyanate into a reaction vessel, adding dehydrated caprolactone diol, dripping a catalyst, heating to 40 ℃, carrying out heat preservation reaction for 0.5h, then slowly heating to 80 ℃, carrying out heat preservation reaction for 2h, and defoaming to obtain a polyamino acid prepolymer for later use;
step two: weighing a polyamino acid prepolymer, adding the polyamino acid prepolymer into a stirrer, preheating the mixture for 5min at 70 ℃, weighing a chain extender, heating and melting the chain extender, pouring the chain extender into the stirrer, stirring the mixture for 3min, defoaming the mixture in vacuum, and curing the mixture for 20h in a drying oven with the constant temperature of 90 ℃ to obtain the polyurethane elastomer.
The polyurethane elastomers prepared in the above examples 1 to 7 were tested for shore a hardness, tensile elongation, tensile strength, heat resistance, hydrophobicity and damping property, respectively, (shore a hardness was measured and recorded according to GB/T5311-2008; tensile elongation and tensile strength were measured and recorded according to GB/T528-2009; heat resistance was measured and recorded by using a dynamic thermodynamic property tester; hydrophobicity was measured and recorded by using a contact angle measuring instrument; damping property was measured and recorded by using a material comprehensive testing machine MTS 810), and the test results are shown in table one.
TABLE 1
As can be seen from the Table I, the damping performance of the modified hydroxyl-terminated polyamino silane in example 4 is reduced compared with that in example 1; in example 5, the hardness, heat resistance, and hydrophobic effect were reduced compared to example 1, and it was found that the heat resistance, hydrophobicity, and hardness of the polyurethane elastomer were all improved by incorporating the silicone diol molecules into the polyurethane molecules; in example 6, the heat resistance and strength properties are further reduced compared with those in example 5, which shows that the organic montmorillonite and the organic silicon are matched to play an important role in improving the heat resistance and strength properties of the polyurethane material, and the polyurethane, the organic silicon and the montmorillonite are combined to complement the advantages so as to prepare the polyurethane elastomer with excellent heat resistance and strength properties.
The above detailed description is only for explaining the present application and not for limiting the present application, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present application.
Claims (10)
1. An organosilicon-modified polyurethane elastomer characterized by: the feed comprises the following raw materials in parts by weight: 10-30 parts of organic montmorillonite, 20-50 parts of organic silicon diol, 60-100 parts of polyether polyol, 55-90 parts of toluene diisocyanate, 15-32 parts of poly-caprolactone diol, 10-26 parts of modified polysiloxane, 1-3 parts of chain extender, 0.4-2 parts of cross-linking agent and 3-10 parts of curing agent.
2. The silicone-modified polyurethane elastomer according to claim 1, characterized in that: the feed comprises the following raw materials in parts by weight: 20 parts of organic montmorillonite, 35 parts of organic silicon diol, 80 parts of polyether polyol, 78 parts of toluene diisocyanate, 23.5 parts of poly-caprolactone diol, 18 parts of modified polysiloxane, 2 parts of chain extender, 1.2 parts of cross-linking agent and 6.5 parts of curing agent.
3. The silicone-modified polyurethane elastomer according to claim 1, characterized in that: the organic montmorillonite is prepared by the following method: mixing sodium montmorillonite dispersed in water with dioctadecyl dimethyl ammonium chloride dispersed in absolute ethyl alcohol, stirring at 75-85 ℃, and then filtering and drying to obtain the organic montmorillonite.
4. The silicone-modified polyurethane elastomer according to claim 1, characterized in that: the preparation method of the modified polysiloxane comprises the following steps:
and (2) mixing the following components in percentage by mass: (1-1.5) mixing toluene diisocyanate and acetone, and introducing N 2 Adding glycolic acid into the mixture at room temperature, reacting for 1-1.5h, heating to 60-70 ℃, adding 2-4 drops of catalyst, and continuing to react for 2.5-3h to obtain the hydroxyl-terminated carbamate modifier;
mixing octamethylcyclotetrasiloxane, aminopropylmethyldimethoxysilane, hydroxyl silicone oil and potassium hydroxide, stirring for 6-7h at the temperature of 150-;
the hydroxyl terminated polyaminosilanes are mixed with a hydroxyl terminated urethane modifier to obtain the modified polysiloxane.
5. A silicone-modified polyurethane elastomer, according to claim 4, characterized in that: the mass ratio of the octamethylcyclotetrasiloxane to the aminopropylmethyldimethoxysilane to the hydroxy silicone oil to the potassium hydroxide is 1.6: 0.7: 1.3: 0.2.
6. the silicone-modified polyurethane elastomer according to claim 1, characterized in that: the curing agent is one or more of triethylene diamine, di (N, N-dimethylaminoethyl) amine and di-thio toluene diamine.
7. The silicone-modified polyurethane elastomer according to claim 1, characterized in that: the cross-linking agent comprises trimethylolpropane and tetraethoxysilane, and the mass ratio of the trimethylolpropane to the tetraethoxysilane is 1: 1.3.
8. the silicone-modified polyurethane elastomer according to claim 1, characterized in that: the chain extender is one or more of polybutylene terephthalate, polyethylene terephthalate and polyethylene terephthalate-1, 4-cyclohexane dimethanol ester.
9. The process for preparing a silicone-modified polyurethane elastomer according to any one of claims 1 to 8, characterized in that: the method comprises the following steps:
s1: dehydrating the poly-caprolactone diol to obtain a sample A; adding organic silicon diol into toluene diisocyanate, reacting for 2-3h at 80-90 ℃, and then cooling to 40-60 ℃ to obtain a sample B; adding the sample A into the sample B in three times in equal amount, heating to 80-85 ℃ after natural temperature rise, reacting for 2-3h, and defoaming to obtain a polyamino acid prepolymer;
s2: stirring and mixing organic montmorillonite and polyether polyol, and grinding to obtain a polyether polyol intercalated montmorillonite compound;
and S3, adding a chain extender into the polyurethane prepolymer, stirring and mixing, adding the polyether polyol intercalated montmorillonite composite, and stirring and mixing for 4-5 hours at room temperature. And adding modified polysiloxane and a cross-linking agent for mixing, adding a curing agent for uniformly mixing, defoaming in vacuum, and curing to obtain the organic silicon modified polyurethane elastomer.
10. The method for producing a silicone-modified polyurethane elastomer according to claim 8, wherein: the polyether polyol in the S2 is prepared from the following components in a mass ratio of 1: polyether diols and polyether triols of (1.2-1.8).
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