High-tear-strength nylon elastomer, preparation method thereof and nylon product

Abstract

The invention relates to a nylon elastomer with high tear strength, a preparation method thereof and a nylon product. The nylon elastomer with high tear strength comprises a nylon segment and a polyether segment, the nylon section is prepared from the following raw materials in parts by mass: 23 to 45 parts of binary acid, 13 to 36 parts of diamine and 1 to 10 parts of polyfunctional group monomer; the polyfunctional group monomer is selected from at least one of citric acid, tartaric acid, malic acid, benzenetricarboxylic acid and pentaerythritol; and the polyether segment is selected from polyhydric alcohols with terminal hydroxyl groups or terminal amino groups. The preparation raw materials in the nylon segment comprise polyfunctional group monomers with specific components and proportions, so that a chemical micro-crosslinking structure can be formed in the nylon segment, and the number of chemical micro-crosslinking is controlled, so that the acting force between nylon chain segment molecules is improved, and the hardness of the nylon elastomer is greatly improved on the basis that the hardness of the nylon elastomer is not obviously changed. The tearing strength of the nylon elastomer is obviously improved.

Description

Technical Field

[0001] The invention relates to the field of polymer materials, in particular to a nylon elastomer with high tear strength, a preparation method thereof and a nylon product. Background Art

[0002] Nylon elastomer (TPAE) is a high-performance thermoplastic elastomer, including a nylon hard segment and a polyether flexible segment. In terms of performance, nylon elastomer combines the rigidity of the nylon segment and the flexibility of the polyether segment, has high hardness, resilience and high tear strength, and is widely used in automotive parts, medical devices, textiles and other fields.

[0003] In the traditional preparation process of nylon elastomers, the hardness and tear strength of nylon elastomers are adjusted by adjusting the mass proportion of nylon segments in nylon elastomers or adjusting the nylon molecular weight. However, when the tear strength of nylon elastomers is improved by traditional methods, the hardness of nylon elastomers is often increased, making nylon elastomers no longer suitable for fields requiring lower hardness. Summary of the invention

[0004] Based on this, it is necessary to provide a nylon elastomer with high tear strength but no significant change in hardness, a preparation method thereof, and a nylon product.

[0005] In a first aspect, the present application provides a nylon elastomer with high tear strength, comprising a nylon segment and a polyether segment;

[0006] The raw materials for preparing the nylon segment include: dibasic acid, diamine and multifunctional monomer; the multifunctional monomer is selected from at least one of citric acid, tartaric acid, malic acid, benzene trimesic acid and pentaerythritol;

[0007] The polyether segment is selected from polyols having terminal hydroxyl groups or terminal amino groups.

[0008] The above-mentioned high tear strength nylon elastomer includes a nylon segment and a polyether segment, wherein the preparation raw materials in the nylon segment include a dibasic acid, a diamine and a multifunctional monomer containing at least three specific components of active groups. The multifunctional monomer containing at least three specific components of active groups can react with the carboxyl group and the amino group in the diacid and the diamine to form a chemical micro-crosslinked structure in the nylon segment, thereby increasing the interaction force between the molecules of the nylon chain segment, so that the tear strength of the nylon elastomer is improved without significantly changing the hardness of the nylon elastomer.

[0009] In some embodiments, the nylon elastomer satisfies at least one of the following conditions:

[0010] (1) The raw materials for preparing the nylon segment include, by weight, 23 to 45 parts of a dibasic acid, 13 to 36 parts of a diamine, and 1 to 10 parts of a multifunctional monomer;

[0011] (2) The mass ratio of the nylon segment to the polyether segment is (0.4-5):1;

[0012] (3) The dibasic acid is at least one selected from adipic acid, azelaic acid, sebacic acid and dodecanedioic acid;

[0013] (4) The diamine is at least one selected from hexamethylenediamine, decanediamine and dodecanediamine;

[0014] (5) The polyether segment is at least one selected from polytetrahydrofuran having a terminal hydroxyl group or a terminal amino group, polyethylene glycol having a terminal hydroxyl group or a terminal amino group, and polypropylene glycol having a terminal hydroxyl group or a terminal amino group.

[0015] In some embodiments, the dibasic acid is selected from two of adipic acid, azelaic acid, sebacic acid and dodecanedioic acid.

[0016] In some embodiments, the mass ratio of the dibasic acid to the diamine is (1.1-3):1.

[0017] In some embodiments, the number average molecular weight of the polyether segment is 250-2000.

[0018] In some embodiments, the raw materials for preparing the nylon segment further include 0.1 to 0.5 parts of a first catalyst; the first catalyst is selected from a magnesium phosphate catalyst.

[0019] The second aspect of the present application provides a method for preparing the nylon elastomer according to the first aspect, comprising the following steps:

[0020] The raw materials for preparing the nylon segment are mixed and subjected to polymerization reaction to obtain a nylon segment polymer;

[0021] The nylon segment polymer is mixed with the polyether segment to carry out esterification reaction to obtain a nylon elastomer.

[0022] In some embodiments, the polymerization reaction satisfies at least one of the following conditions:

[0023] (1) The polymerization reaction temperature is 220°C to 260°C;

[0024] (2) The polymerization reaction time is 0.5h~1h;

[0025] (3) The polymerization reaction pressure is 70 KPa to 90 KPa.

[0026] In some embodiments, the esterification reaction satisfies at least one of the following conditions:

[0027] (1) The temperature of the esterification reaction is 220°C to 260°C;

[0028] (2) The esterification reaction time is 2h~3h;

[0029] (3) The pressure of the esterification reaction is 0.5KPa~5KPa;

[0030] (4) The esterification reaction is carried out under the condition of a second catalyst, and the second catalyst is selected from magnesium phosphate catalysts.

[0031] A third aspect of the present application provides a nylon product, wherein the nylon product comprises the nylon elastomer described in the first aspect. DETAILED DESCRIPTION

[0032] The technical solution of the present invention is further described in detail below in conjunction with specific embodiments. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0034] A first aspect of the present application provides a nylon elastomer with high tear strength, comprising a nylon segment and a polyether segment.

[0035] The raw materials for preparing the nylon segment include: dibasic acid, diamine and multifunctional monomer; the multifunctional monomer is selected from at least one of citric acid, tartaric acid, malic acid, benzene trimeric acid and pentaerythritol;

[0036] The polyether segment is selected from polyols having terminal hydroxyl groups or terminal amino groups.

[0037] The multifunctional monomer has at least three active groups, and the active groups include at least one of a hydroxyl group and a carboxyl group.

[0038] The above-mentioned high tear strength nylon elastomer includes a nylon segment and a polyether segment, wherein the preparation raw materials in the nylon segment include a dibasic acid, a diamine and a multifunctional monomer containing at least three specific components of active groups. The multifunctional monomer containing at least three specific components of active groups can react with the carboxyl group and the amino group in the diacid and the diamine to form a chemical micro-crosslinked structure in the nylon segment, thereby increasing the interaction force between the molecules of the nylon chain segment, so that the tear strength of the nylon elastomer is significantly improved without significantly changing the hardness of the nylon elastomer.

[0039] In some embodiments, the raw materials for preparing the nylon segment include 23 to 45 parts of dibasic acid, 13 to 36 parts of diamine, and 1 to 10 parts of multifunctional monomers by weight. Further controlling the ratio of the raw materials for preparing the nylon segment can control the molecular weight of the nylon segment and the number of chemical micro-crosslinks, and accurately control the tear strength of the nylon elastomer.

[0040] As an example, in the raw material for preparing the nylon segment, the mass fraction of the dibasic acid can be 23 parts, 25 parts, 28 parts, 30 parts, 32 parts, 33 parts, 34 parts, 35 parts, 36 parts, 38 parts, 40 parts, 41 parts, 42 parts, 43 parts, 44 parts or 45 parts. Further, the mass fraction of the dibasic acid can be a range value consisting of any two of the above point values ​​as end values. Preferably, the mass fraction of the dibasic acid can be 35 parts to 45 parts.

[0041] As an example, in the raw material for preparing the nylon segment, the mass fraction of the diamine can be 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, 28 parts, 30 parts, 32 parts, 35 parts or 36 parts. Further, the mass fraction of the dibasic acid can be a range value consisting of any two of the above point values ​​as end values. Preferably, the mass fraction of the dibasic acid can be 15 parts to 25 parts.

[0042] As an example, in the raw material for preparing the nylon segment, the mass fraction of the multifunctional monomer can be 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts or 10 parts. Further, the mass fraction of the multifunctional monomer can be a range value consisting of any two of the above point values ​​as end values. Preferably, the mass fraction of the multifunctional monomer can be 1 part to 5 parts.

[0043] In some embodiments, the nylon elastomer comprises the structure of Formula I:

[0044]

[0045] I

[0046] Wherein, R1 represents a multifunctional monomer containing at least four active groups, R2 represents a polyether segment, and R3 represents a carboxyl-terminated or amino-terminated polyamide segment; a, b, c and d are independently integers; and n is a positive integer. It is understood that the above R1 can be at least one of citric acid, tartaric acid and pentaerythritol. The above R3 is a polyamide segment formed by polymerization of a dibasic acid and a diamine. The integer can be 0.

[0047] In the above structure of formula I, the carboxyl-terminated or amino-terminated nylon segments are chemically micro-crosslinked through multifunctional monomers to increase the intermolecular forces of the nylon segments, thereby increasing the tear strength of the nylon elastomer; and the free movement of the polyether segments is not changed, maintaining the flexibility of the polyether segments.

[0048] In some embodiments, the mass ratio of the nylon segment to the polyether segment is (0.4-5):1. As an example, the mass ratio of the nylon segment to the polyether segment is 0.4:1, 0.5:1, 0.8:1, 0.9:1, 1.0:1, 1.1:1, 1.2:1, 1.5:1, 1.6:1, 1.8:1, 2.0:1, 2.5:1, 3.0:1, 3.5:1, 4.0:1, 4.5:1 or 5:1. Further, the mass ratio of the nylon segment to the polyether segment can be any other ratio within the above range. By controlling the mass ratio between the nylon segment and the polyether segment, the tear strength and hardness value of the nylon elastomer can be controlled.

[0049] In some embodiments, the polyether segment is selected from at least one of polytetrahydrofuran having a terminal hydroxyl group or an amino group, polyethylene glycol having a terminal hydroxyl group or an amino group, and polypropylene glycol having a terminal hydroxyl group or an amino group.

[0050] In some embodiments, the number average molecular weight of the polyether segment is 250 to 2000. As an example, the number average molecular weight of the polyether segment can be 250, 500, 650, 800, 1000, 1500 or 2000. Further, the number average molecular weight of the polyether segment can be a range value consisting of any two of the above point values ​​as end values. The tear strength of the nylon elastomer can be increased by controlling the number average molecular weight of the polyether segment.

[0051] In some embodiments, the dibasic acid is selected from C6 to C 12 Aliphatic dibasic acids. Among them, C6~C 12 Aliphatic dibasic acids refer to aliphatic dibasic acids containing 6 to 12 carbon atoms in the molecular chain.

[0052] Furthermore, the above dibasic acid can be C6~C 12 Straight chain aliphatic dibasic acids and C6~C 12 At least one of the branched aliphatic dibasic acids.

[0053] Further, the dibasic acid is selected from at least one of adipic acid, azelaic acid, sebacic acid and dodecanedioic acid. Preferably, the dibasic acid is selected from two of adipic acid, azelaic acid, sebacic acid and dodecanedioic acid.

[0054] In some embodiments, the diamine is selected from C6 to C 12 Aliphatic diamines. Among them, C6~C 12 Aliphatic diamine refers to an aliphatic diamine containing 6 to 12 carbon atoms in the molecular chain.

[0055] Furthermore, the above dibasic acid can be C6~C 12 Straight chain aliphatic diamines and C6~C 12 At least one of the branched aliphatic diamines.

[0056] Furthermore, the dibasic acid is at least one selected from hexamethylenediamine, decanediamine and dodecanediamine.

[0057] In some embodiments, the mass ratio of the dibasic acid to the diamine is (1.1-3):1. As an example, the mass ratio of the dibasic acid to the diamine can be 1.1:1, 1.5:1, 1.8:1, 2:1, 2.2:1, 2.4:1, 2.5:1, 2.8:1 or 3:1. Further, the mass ratio of the dibasic acid to the diamine can be any other ratio within the above range. By controlling the mass ratio of the dibasic acid to the diamine, the molecular weight of the nylon segment can be controlled, thereby controlling the performance of the nylon elastomer.

[0058] In some embodiments, the number average molecular weight of the nylon segment is 650-3000.

[0059] In some embodiments, the raw material for preparing the nylon segment further includes 0.1 to 0.5 parts of the first catalyst. As an example, in the raw material for preparing the nylon segment, the mass fraction of the first catalyst can be 0.1, 0.15, 0.20, 0.3, 0.4 or 0.5 parts. Further, the mass fraction of the first catalyst can be a range value consisting of any two of the above point values ​​as end values.

[0060] In some embodiments, the first catalyst is selected from magnesium phosphate catalysts. Preferably, the first catalyst is magnesium phosphite.

[0061] In some embodiments, the tear strength of the nylon elastomer is 200 MPa-250 MPa.

[0062] In some embodiments, the Shore hardness of the nylon elastomer is 35D-45D.

[0063] In some embodiments, the compression set of the nylon elastomer is 28% to 35%.

[0064] In one embodiment of the present application, a method for preparing a nylon elastomer is provided, comprising the following steps S10 to S20.

[0065] S10, mixing the raw materials for preparing the nylon segment, and performing a polymerization reaction to obtain a nylon segment polymer;

[0066] S20, mixing the nylon segment polymer and the polyether segment to carry out esterification reaction to obtain a nylon elastomer.

[0067] In the above preparation method, the raw materials for preparing the nylon segment are first polymerized, and the multifunctional monomers can be connected to the nylon chain segment to form a nylon polymer. The molecular chain of the nylon polymer also contains active groups hydroxyl or carboxyl, so that chemical micro-crosslinking can occur between the nylon segments. At the same time, the nylon polymer contains carboxyl, hydroxyl and amino groups, which can be dehydrated and esterified with the terminal hydroxyl or terminal amino groups of the polyether segment, thereby achieving chemical bonding between the nylon segment and the polyether segment, and obtaining a nylon elastomer with a chemical micro-crosslinking structure. The elastomer has a high tear strength.

[0068] In some embodiments, the polymerization temperature is 220°C to 260°C.

[0069] In some embodiments, the polymerization reaction time is 0.5 h to 1 h.

[0070] In some embodiments, the polymerization reaction pressure is 70KPa to 90KPa. As an example, the polymerization reaction pressure can be 70KPa, 72KPa, 75KPa, 76KPa, 78KPa, 80KPa, 82KPa, 84KPa, 85KPa, 86KPa, 88KPa or 90KPa. Preferably, the polymerization reaction pressure is 75KPa to 85KPa. The polymerization is carried out under a slightly negative pressure to prepare the nylon segment, so that the nylon polymerization reaction is accelerated and the water vapor is removed. Because nylon reacts faster, a too high vacuum degree is not required.

[0071] In some embodiments, the temperature of the esterification reaction is 220°C to 260°C.

[0072] In some embodiments, the esterification reaction time is 2 h to 4 h.

[0073] In some embodiments, the pressure of the esterification reaction is 0.5 KPa~5 KPa.

[0074] In some embodiments, the esterification reaction is carried out in the presence of a second catalyst.

[0075] In some embodiments, the second catalyst is selected from magnesium phosphate catalysts. Preferably, the second catalyst is magnesium phosphite. It is understood that the components of the first catalyst and the second catalyst can be the same.

[0076] In some embodiments, the second catalyst is added in the same amount as the first catalyst.

[0077] In yet another embodiment of the present application, a nylon product is provided. The nylon product includes the above-mentioned nylon elastomer.

[0078] In some embodiments, the nylon products include but are not limited to window seals, underbody protection strips, pipe seals, conveyor belts, and sports shoe soles.

[0079] In order to make the purpose, technical solutions and advantages of the present invention more concise and clear, the present invention is described with the following specific embodiments, but the present invention is by no means limited to these embodiments. The embodiments described below are only preferred embodiments of the present invention, which can be used to describe the present invention and cannot be understood as limiting the scope of the present invention. It should be pointed out that any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0080] In order to better illustrate the present invention, the present invention is further described below in conjunction with the embodiments. The following are specific embodiments.

[0081] Example 1

[0082] The raw materials were prepared according to the following ratio: 190g citric acid, 2135g dodecane dicarboxylic acid, 1010g sebacic acid, 1575g decanediamine, 10g magnesium phosphate and 500g deionized water, and each component was placed in a 20L high-pressure reactor with a stirrer: the temperature was raised to 250°C, the pressure was released to normal pressure in the reactor, and the pressure in the reactor was evacuated to 80Kpa, and the reaction was carried out for 0.5h. Then nitrogen was filled into the reactor until the pressure in the reactor was normal pressure, and then 4700g of 650 molecular weight polytetrahydrofuran and 10g magnesium phosphate were added, and the pressure in the reactor was evacuated to 5Kpa, and the reaction was carried out for 3h, and nylon elastomer particles were obtained by pelletizing.

[0083] Example 2

[0084] The raw materials were prepared according to the following ratio: 190g citric acid, 3285g dodecane dicarboxylic acid, 1575g decanediamine, 10g magnesium phosphate and 500g deionized water, and the components were placed in a 20L high-pressure reactor with a stirrer: the temperature was raised to 250°C, the pressure in the reactor was released to normal pressure, and the pressure in the reactor was evacuated to 80Kpa, and the reaction was carried out for 0.5h. Then nitrogen was filled into the reactor until the pressure in the reactor was normal pressure, and then 4700g of 650 molecular weight polytetrahydrofuran and 10g magnesium phosphate were added, and the pressure in the reactor was evacuated to 5Kpa, and the reaction was carried out for 3h, and nylon elastomer particles were obtained by pelletizing.

[0085] Example 3

[0086] The raw materials were prepared according to the following ratio: 190g citric acid, 4565g dodecane dibasic acid, 3215g decanediamine, 10g magnesium phosphate and 500g deionized water, and the components were placed in a 20L high-pressure reactor with a stirrer: the temperature was raised to 250°C, the pressure was released to normal pressure in the reactor, and the pressure in the reactor was evacuated to 80Kpa, and the reaction was carried out for 0.5h. Then nitrogen was filled into the reactor until the pressure in the reactor was normal pressure, and then 2050g 650 molecular weight polytetrahydrofuran and 10g magnesium phosphate were added, and the pressure in the reactor was evacuated to 5Kpa, and the reaction was carried out for 3h, and nylon elastomer particles were obtained by pelletizing.

[0087] Example 4

[0088] The raw materials are prepared according to the following ratio: 2135g of dodecanedioic acid, 1010g of sebacic acid, 1575g of decanediamine, 20g of magnesium phosphate, 500g of deionized water, 190g of citric acid and 4700g of 650 molecular weight polytetrahydrofuran, and the components are placed in a 20L high-pressure reactor with a stirrer: the temperature is raised to 250°C, the pressure is released to normal pressure, and then the pressure in the reactor is evacuated to within 5KPa, the reaction is carried out for 3h, and nylon elastomer particles are obtained by pelletizing.

[0089] Comparative Example 1

[0090] The raw materials were prepared according to the following ratio: 2585 g of dodecanedioic acid, 1220 g of sebacic acid, 1750 g of decanediamine, 4700 g of 650 molecular weight polytetrahydrofuran, 900 g of deionized water and 20 g of magnesium phosphate, and the components were placed in a 20 L high-pressure reactor with a stirrer, heated to 250 ° C, depressurized to normal pressure, then evacuated to a pressure within 5 KPa, reacted for 3 hours, and pelletized to obtain nylon elastomer particles.

[0091] Comparative Example 2

[0092] The raw materials were prepared according to the following ratio: 190g of citric acid, 4700g of 650 molecular weight polytetrahydrofuran and 10g of magnesium phosphate, and the components were placed in a 20L high-pressure reactor with a stirrer, heated to 220°C, and vacuumed to maintain the pressure in the reactor at 80Kpa for 2h. Then, nitrogen was charged into the reactor until the pressure in the reactor was normal pressure, and 2135g of dodecane dicarboxylic acid, 1010g of sebacic acid, 1575g of decanediamine and 10g of magnesium phosphate were added; the temperature was raised to 250°C, and the reaction was continued for 1h, and then the pressure in the reactor was vacuumed to within 5Kpa, and the reaction was continued for 3h, and nylon elastomer particles were obtained by pelletizing.

[0093] Performance Test:

[0094] Tear strength: Refer to the determination of tear strength in GB / T529-2008, test at a speed of 500mm / min on a right-angle sample, test at least 5 specimens, and take the average value of the results.

[0095] Shore hardness D: Tested according to GB / T2411-2008; at least 5 points are tested, the sample size is 100mm×100mm, the top of the indenter is greater than 9mm from the edge of the sample, and the interval between the two test points is greater than 6mm; the result is averaged.

[0096] Compression permanent deformation: Test according to GB / T7759.1-2015, prepare a sample with a diameter of 29±0.5mm and a height of 12.5±0.5mm, compress it for 24h at a compression rate of 10% and a temperature of 23±2℃, and then test it.

[0097] The performance test data of the nylon elastomers prepared in various embodiments and comparative examples are shown in Table 1.

[0098] Table 1

[0099]

[0100] It can be seen from Table 1 that the tear strength of the nylon elastomers prepared in Examples 1 to 4 reaches 158 MPa to 222 MPa, the Shore hardness is 40D to 51D, and the compression set is 29% to 35%. Among them, compared with Example 1, Example 3 increases the proportion of nylon, so that the hardness of the nylon elastomer is improved.

[0101] In Comparative Example 1, no multifunctional monomer was added during the whole process. The tear strength of the nylon elastomer prepared therefrom was 108 MPa, the Shore hardness was 40D, and the compression permanent deformation was 31%. In Comparative Example 2, the multifunctional monomer was first added to the polyether component, and then the nylon segment was prepared. At this time, the multifunctional monomer was not added to the nylon segment. The tear strength of the nylon elastomer obtained in Comparative Example 2 was only 105 MPa, the Shore hardness was 41D, and the compression permanent deformation was 31%.

[0102] In the nylon elastomers prepared in Examples 1 to 4, the multifunctional monomers are connected in the nylon segments; in terms of performance, compared with Comparative Examples 1 and 2, the nylon elastomers prepared in Examples 1 to 4 have improved tear strength while maintaining substantially stable hardness, and the tear strength can be improved by more than 100%. Moreover, the permanent compression deformation of the nylon elastomers prepared in Examples 1 to 4 is reduced, and the deformation amount of nylon is smaller.

[0103] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0104] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A nylon elastomer with high tear strength, characterized in that: It includes a nylon segment and a polyether segment; The raw materials for preparing the nylon segment include: dibasic acid, diamine and multifunctional monomer; the multifunctional monomer is selected from at least one of citric acid, tartaric acid, malic acid, benzene trimesic acid and pentaerythritol; The polyether segment is selected from polyols having terminal hydroxyl groups or terminal amino groups.

2. The nylon elastomer according to claim 1, characterized in that The nylon elastomer satisfies at least one of the following conditions: (1) The raw materials for preparing the nylon segment include, by weight, 23 to 45 parts of a dibasic acid, 13 to 36 parts of a diamine, and 1 to 10 parts of a multifunctional monomer; (2) The mass ratio of the nylon segment to the polyether segment is (0.4-5):1; (2) The dibasic acid is at least one selected from adipic acid, azelaic acid, sebacic acid and dodecanedioic acid; (3) The diamine is at least one selected from hexamethylenediamine, decanediamine and dodecanediamine; (4) The polyether segment is at least one selected from polytetrahydrofuran having a terminal hydroxyl group or a terminal amino group, polyethylene glycol having a terminal hydroxyl group or a terminal amino group, and polypropylene glycol having a terminal hydroxyl group or a terminal amino group.

3. The nylon elastomer according to any one of claims 1 to 2, characterized in that The dibasic acid is selected from two of adipic acid, azelaic acid, sebacic acid and dodecanedioic acid.

4. The nylon elastomer according to any one of claims 1 to 2, characterized in that The mass ratio of the dibasic acid to the diamine is (1.1-3):

1.

5. The nylon elastomer according to any one of claims 1 to 2, characterized in that The number average molecular weight of the polyether segment is 250-2000.

6. The nylon elastomer according to any one of claims 1 to 2, characterized in that: The raw materials for preparing the nylon segment also include 0.1 to 0.5 parts of a first catalyst; the first catalyst is selected from a magnesium phosphate catalyst.

7. The method for preparing a nylon elastomer according to any one of claims 1 to 6, characterized in that: The steps include: The raw materials for preparing the nylon segment are mixed and subjected to polymerization reaction to obtain a nylon segment polymer; The nylon segment polymer is mixed with the polyether segment to carry out esterification reaction to obtain a nylon elastomer.

8. The method for preparing a nylon elastomer according to claim 7, characterized in that: The polymerization reaction satisfies at least one of the following conditions: (1) The polymerization reaction temperature is 220°C to 260°C; (2) The polymerization reaction time is 0.5h~1h; (3) The polymerization reaction pressure is 70 KPa to 90 KPa.

9. The method for preparing a nylon elastomer according to claim 7 or 8, characterized in that: The esterification reaction satisfies at least one of the following conditions: (1) The temperature of the esterification reaction is 220°C to 260°C; (2) The esterification reaction time is 2h~3h; (3) The pressure of the esterification reaction is 0.5KPa~5KPa; (4) The esterification reaction is carried out under the condition of a second catalyst, and the second catalyst is selected from magnesium phosphate catalysts.

10. A nylon product, characterized in that: The nylon product comprises the nylon elastomer as described in any one of claims 1 to 6.

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