Antistatic polyurethane foam and preparation method and application thereof

Abstract

The present invention provides an antistatic polyurethane foam and a preparation method and application thereof, wherein the foam is composed of a specific proportion of polyester polyol, polyether polyol, antistatic agent, diisocyanate, catalyst, foaming agent and other additives. By optimizing the raw material ratio and the preparation process, the prepared foam has excellent antistatic performance, buffering and shock absorption capacity, heat insulation and heat preservation effect, and sound insulation and noise reduction characteristics, and has good environmental protection and recyclability. The present invention also clarifies the application of the foam in electronic products, which can be used as an internal liner, protective material or packaging material to effectively prevent static electricity from damaging electronic components and improve the reliability and service life of electronic products. In addition, the preparation method of the foam is simple and efficient, and is suitable for industrial production. The antistatic polyurethane foam of the present invention has broad application prospects in the field of electronic products.

Description

Technical Field

[0001] The invention belongs to the field of environmentally friendly antistatic new materials, and specifically discloses an antistatic polyurethane foam and a preparation method and application thereof. Background Art

[0002] As electronic products become more popular and sophisticated, the requirements for materials are getting higher and higher. In particular, traditional materials are often unable to meet the needs of modern electronic products in terms of anti-static, cushioning and shock absorption, heat insulation, and environmental protection and recyclability.

[0003] Static electricity is a common and unavoidable problem in the use of electronic products. Static electricity accumulation may not only damage electronic components, reduce product reliability and service life, but also cause safety hazards. Therefore, it is particularly important to develop electronic materials with antistatic properties.

[0004] At the same time, electronic products are often affected by mechanical shock and vibration during transportation, storage and use, which requires materials to have good cushioning and shock absorption capabilities to protect electronic components from damage. In addition, with the increasing awareness of environmental protection, the environmental recyclability of materials has also become a consideration that cannot be ignored.

[0005] However, traditional materials often cannot meet these requirements at the same time. For example, some materials have good antistatic properties but poor cushioning and shock absorption capabilities; other materials may have good cushioning and shock absorption capabilities but poor environmental performance. Therefore, it is urgent to develop a new type of material that can simultaneously meet the needs of electronic products in terms of antistatic, cushioning and shock absorption, thermal insulation, and environmental protection and recyclability. Summary of the invention

[0006] To solve the above problems, we disclose an antistatic polyurethane foam and its preparation method and application, aiming to solve many problems existing in the application of existing materials in electronic products and provide new material options for the development of electronic products.

[0007] The present invention includes the following specific technical solutions:

[0008] An antistatic polyurethane foam, characterized in that it is composed of the following raw materials in parts by weight:

[0009] A. A polyol component, comprising:

[0010] At least one polyester polyol having a molecular weight of 500 to 3000 and a hydroxyl value of 20 to 56 mg KOH / g, which is used to provide the basic structure and elasticity of the foam, based on 100 parts;

[0011] At least one polyether polyol having a molecular weight of 400 to 2000 and containing at least two hydroxyl groups, used to improve the flexibility and water resistance of the foam, in an amount of 5 to 50 parts;

[0012] And, an antistatic agent, which is a compound containing a quaternary ammonium salt or a quaternary phosphonium salt structure, is used to impart antistatic properties to the foam, and the amount used is 0.5 to 5 parts;

[0013] B. an isocyanate component, comprising:

[0014] At least one aromatic or aliphatic diisocyanate, with an NCO content of 20% to 35%, used to react with the polyol component to form a polyurethane network structure, in an amount of 50-100 parts;

[0015] C. a catalyst selected from an amine catalyst or an organic metal catalyst, used to accelerate the formation reaction of the polyurethane, the amount of which is 0.5 to 1.5 parts;

[0016] D. a foaming agent, selected from water or an inert gas, the amount of which is adjusted according to the density and porosity of the desired foam;

[0017] E. Other additives, including but not limited to flame retardants, pigments, fillers and stabilizers, the dosage of which is adjusted according to actual needs.

[0018] Furthermore, the above-mentioned antistatic polyurethane foam,

[0019] A. A polyol component, comprising:

[0020] Polyester polyol, selected from one or more of polycaprolactone diol, polyethylene glycol-adipate polyester diol or polyadipate-1,4-butylene glycol ester diol, with a molecular weight of 1000 to 2500 and a hydroxyl value of 30 to 50 mg KOH / g, used in an amount of 100 parts;

[0021] Polyether polyol, selected from one or both of polypropylene glycol and polytetramethylene glycol, with a molecular weight of 600 to 1500 and containing at least two hydroxyl groups, used in an amount of 5 to 50 parts;

[0022] And, the antistatic agent is selected from quaternary ammonium salt antistatic agents such as dodecyl dimethyl benzyl ammonium chloride, or quaternary phosphonium salt antistatic agents such as the reaction product of trioctyl phosphate and ethanolamine; the dosage is 0.5-5 parts.

[0023] Furthermore, the above-mentioned antistatic polyurethane foam,

[0024] B. an isocyanate component, comprising:

[0025] Diisocyanate, selected from one or more of toluene diisocyanate (TDI), diphenylmethane diisocyanate (MDI) or hexamethylene diisocyanate (HDI), with an NCO content of 25% to 32%; used in an amount of 50-100 parts.

[0026] Furthermore, the above-mentioned antistatic polyurethane foam,

[0027] C. Catalyst, selected from one or more of triethylamine, dimethylethanolamine or dibutyltin dilaurate, used in an amount of 0.5-1.5 parts.

[0028] Furthermore, in the above-mentioned antistatic polyurethane foam, the foaming agent is water, which is used in an amount of 1-10 parts.

[0029] Furthermore, in the above-mentioned antistatic polyurethane foam, the other additives include:

[0030] Flame retardant, selected from antimony trioxide, decabromodiphenylethane or a mixture thereof, used in an amount of 0.1-0.3 parts;

[0031] Pigment, choose according to the desired color, the amount is 0.05-0.5 parts;

[0032] Filler, selected from calcium carbonate, talc or wollastonite, used to enhance the mechanical properties of the foam, with an amount of 0.1-0.5 parts;

[0033] The stabilizer is selected from antioxidants or ultraviolet absorbers to improve the weather resistance of the foam, and the amount used is 0.05-0.2 parts.

[0034] Preferably, an antistatic polyurethane foam is composed of the following raw materials in parts by weight:

[0035] A. A polyol component, comprising:

[0036] Polyester polyol, selected from polycaprolactone diol, having a molecular weight of 1500 and a hydroxyl value of 40 mg KOH / g, used in an amount of 100 parts;

[0037] Polyether polyol, selected from polypropylene glycol, having a molecular weight of 1000 and containing at least two hydroxyl groups, used in an amount of 20 parts;

[0038] and, an antistatic agent selected from dodecyl dimethyl benzyl ammonium chloride, used in an amount of 2 parts;

[0039] B. an isocyanate component, comprising:

[0040] Diisocyanate, selected from toluene diisocyanate (TDI), having an NCO content of 28%, used in an amount of 75 parts;

[0041] C. a catalyst selected from triethylamine, used in an amount of 1 part;

[0042] D. Foaming agent, water, 5 parts;

[0043] E. Other additives, including:

[0044] Flame retardant, selected from antimony trioxide, used in an amount of 0.2 parts;

[0045] Pigment: titanium dioxide is selected to provide white color, the dosage is 0.2 parts;

[0046] Filler, selected from calcium carbonate, used to enhance the mechanical properties of the foam, with an amount of 0.3 parts;

[0047] The stabilizer is selected from antioxidants and is used to improve the weather resistance of the foam, and the amount used is 0.1 parts.

[0048] The present invention also discloses a method for preparing the antistatic polyurethane foam, which comprises the following steps:

[0049] In a reaction container with heating and stirring functions, the polyol component, isocyanate component, catalyst, foaming agent and other additives are mixed uniformly; under stirring at 100-300 rpm and a temperature of 60-80° C., the mixture is subjected to a polyurethane forming reaction for 30-60 minutes while maintaining normal pressure, cooled to room temperature, and cut as needed to obtain antistatic polyurethane foam.

[0050] The present invention also discloses the application of the antistatic polyurethane foam in electronic products.

[0051] The surface resistivity of polyurethane foam is not less than 106Ω and not more than 109Ω under the conditions of relative humidity of 50% and temperature of 23℃;

[0052] The antistatic polyurethane foam is used as an internal lining, protective material or packaging material of electronic products to provide one or more of the following functions:

[0053] a) Antistatic protection: The antistatic polyurethane foam can effectively prevent the static electricity generated during the use of electronic products from damaging electronic components, thereby improving the reliability and service life of electronic products;

[0054] b) Cushioning and shock absorption: Using the elasticity and resilience of foam to provide effective cushioning and shock absorption effects for electronic products, protecting electronic products from mechanical shock and vibration during transportation, storage and use;

[0055] c) Heat insulation: The antistatic polyurethane foam has good heat insulation performance, which can block the influence of external heat on the internal components of electronic products to a certain extent, while keeping the temperature inside the electronic products stable;

[0056] d) Sound insulation and noise reduction: The porous structure of the foam has a certain sound insulation effect, which can reduce the noise generated by electronic products during use and improve the user experience;

[0057] e) Environmentally friendly and recyclable: the antistatic polyurethane foam is made of environmentally friendly materials and can be recycled to reduce environmental pollution.

[0058] Compared with the prior art, the present invention has the following outstanding beneficial effects:

[0059] Excellent antistatic performance: By adding a specific proportion of antistatic agent, the surface resistivity of the antistatic polyurethane foam prepared by the present invention can be controlled within 10 under the conditions of relative humidity of 50% and temperature of 23°C. 6 -10 7 Ω / sq, effectively preventing the damage of static electricity generated during the use of electronic products to electronic components, and significantly improving the reliability and service life of electronic products.

[0060] Excellent cushioning and shock-absorbing capabilities: Due to the use of a compound system of polyester polyols and polyether polyols and the optimization of the raw material ratio, the foam prepared by the present invention has excellent elasticity and resilience, can provide effective cushioning and shock-absorbing effects for electronic products, and protect electronic products from mechanical shock and vibration during transportation, storage and use.

[0061] Good thermal insulation performance: The antistatic polyurethane foam of the present invention has good thermal insulation performance, which can block the influence of external heat on the internal components of electronic products to a certain extent, while maintaining the temperature inside the electronic products stable, providing a strong guarantee for the stable operation of the electronic products.

[0062] Significant sound insulation and noise reduction effect: The porous structure of the foam gives it a certain sound insulation effect. The antistatic polyurethane foam prepared by the present invention can reduce the noise generated by electronic products during use and improve the user experience.

[0063] Environmental protection and recyclability: The present invention adopts environmentally friendly materials to make antistatic polyurethane foam, and the foam can be recycled, which reduces environmental pollution and conforms to the green and sustainable development concept.

[0064] The preparation process is simple and efficient: the preparation method of the present invention is simple and easy to understand, easy to operate, and has mild reaction conditions, which is easy to realize industrial production, reduces production costs, and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] Figure 1 UV aging test % of the foams of Examples 1-5 and the comparative example (tested according to ASTM G154 standard, expressed as the reduction ratio of elongation at break);

[0066] Figure 2 Compression strength (kpa) test of the foams of Examples 1-5 and Comparative Example;

[0067] Figure 3 The thermal insulation performance test (W / (m·K)) of the foams of Examples 1-5 and the comparative example is that the lower the better. DETAILED DESCRIPTION

[0068] An antistatic polyurethane foam is composed of the following raw materials in parts by weight:

[0069] A. A polyol component, comprising:

[0070] Polyester polyol, selected from one or more of polycaprolactone diol, polyethylene glycol-adipate polyester diol or polyadipate-1,4-butylene glycol ester diol, with a molecular weight of 1000 to 2500 and a hydroxyl value of 30 to 50 mg KOH / g, used in an amount of 100 parts;

[0071] Polyether polyol, selected from one or both of polypropylene glycol and polytetramethylene glycol, with a molecular weight of 600 to 1500 and containing at least two hydroxyl groups, used in an amount of 5 to 50 parts;

[0072] And, an antistatic agent selected from quaternary ammonium salt antistatic agents such as dodecyl dimethyl benzyl ammonium chloride, or quaternary phosphonium salt antistatic agents such as the reaction product of trioctyl phosphate and ethanolamine; the amount is 0.5-5 parts;

[0073] B. an isocyanate component, comprising:

[0074] At least one aromatic or aliphatic diisocyanate, with an NCO content of 20% to 35%, used to react with the polyol component to form a polyurethane network structure, in an amount of 50-100 parts;

[0075] C. a catalyst selected from one or more of triethylamine, dimethylethanolamine or dibutyltin dilaurate, in an amount of 0.5-1.5 parts;

[0076] D. a blowing agent, wherein the blowing agent is water, and the amount is 1-10 parts;

[0077] E. Other additives,

[0078] Flame retardant, selected from antimony trioxide, decabromodiphenylethane or a mixture thereof, used in an amount of 0.1-0.3 parts;

[0079] Pigment, choose according to the desired color, the amount is 0.05-0.5 parts;

[0080] Filler, selected from calcium carbonate, talc or wollastonite, used to enhance the mechanical properties of the foam, with an amount of 0.1-0.5 parts;

[0081] The stabilizer is selected from antioxidants or ultraviolet absorbers to improve the weather resistance of the foam, and the amount used is 0.05-0.2 parts.

[0082] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0083] In the embodiment:

[0084] The aromatic diisocyanate is toluene diisocyanate,

[0085] The aliphatic diisocyanate is hexamethylene diisocyanate,

[0086] The antioxidant is dilauryl thiodipropionate,

[0087] The ultraviolet absorber is 2-hydroxy-4-methoxybenzophenone.

[0088] Example 1

[0089] An antistatic polyurethane foam is composed of the following raw materials in parts by weight:

[0090] Polyol components:

[0091] Polyester polyol: polycaprolactone diol, average molecular weight 1500, hydroxyl value 40mg KOH / g, dosage 100 parts;

[0092] Polyether polyol: polypropylene glycol, molecular weight 800, dosage 20 parts;

[0093] Antistatic agent: dodecyl dimethyl benzyl ammonium chloride, dosage 2 parts;

[0094] Isocyanate component:

[0095] Aromatic diisocyanate, NCO content 25%, dosage 70 parts;

[0096] catalyst:

[0097] Triethylamine, 1 part;

[0098] Foaming agent:

[0099] Water, 5 parts;

[0100] Other additives:

[0101] Flame retardant: antimony trioxide, dosage 0.2 parts;

[0102] Pigment: Choose according to the required color, dosage 0.2 parts;

[0103] Filler: calcium carbonate, dosage 0.3 parts;

[0104] Stabilizer: Antioxidant, dosage 0.1 part.

[0105] Preparation method: In a reaction container with heating and stirring functions, a polyol component, an isocyanate component, a catalyst, a foaming agent and other additives are mixed uniformly; under stirring at 100-300 rpm and a temperature of 60-80°C, normal pressure is maintained to allow the mixture to undergo a polyurethane forming reaction for 30-60 minutes, the mixture is cooled to room temperature, and antistatic polyurethane foam is obtained by cutting as needed.

[0106] Example 2

[0107] An antistatic polyurethane foam is composed of the following raw materials in parts by weight:

[0108] Polyol components:

[0109] Polyester polyol: polyethylene glycol-adipic acid polyester diol, average molecular weight 2000, hydroxyl value 35 mg KOH / g, dosage 100 parts;

[0110] Polyether polyol: polytetramethylene glycol, molecular weight 1200, dosage 30 parts;

[0111] Antistatic agent: dodecyl dimethyl benzyl ammonium chloride, dosage 3 parts;

[0112] Isocyanate component:

[0113] Aliphatic diisocyanate, NCO content 30%, dosage 80 parts;

[0114] catalyst:

[0115] Dimethylethanolamine, 1.2 parts;

[0116] Foaming agent:

[0117] Water, 7 parts;

[0118] Other additives:

[0119] Flame retardant: decabromodiphenylethane, dosage 0.25 parts;

[0120] Pigment: Choose according to the required color, the dosage is 0.3 parts;

[0121] Filler: talcum powder, dosage 0.4 parts;

[0122] Stabilizer: UV absorber, dosage 0.15 parts.

[0123] The preparation is the same as Example 1.

[0124] Example 3

[0125] An antistatic polyurethane foam is composed of the following raw materials in parts by weight:

[0126] Polyol components:

[0127] Polyester polyol: poly(1,4-butylene adipate diol), average molecular weight 1000, hydroxyl value 50 mg KOH / g, dosage 100 parts;

[0128] Polyether polyol: a mixture of polypropylene glycol and polytetrahydrofuran diol (mass ratio 1:1), with an average molecular weight of 1000, and an amount of 40 parts;

[0129] Antistatic agent: dodecyl dimethyl benzyl ammonium chloride, dosage 4 parts;

[0130] Isocyanate component:

[0131] A mixture of aromatic and aliphatic diisocyanates (mass ratio 1:1), NCO content 28%, dosage 90 parts;

[0132] catalyst:

[0133] Dibutyltin dilaurate, 1.5 parts;

[0134] Foaming agent:

[0135] Water, 9 parts;

[0136] Other additives:

[0137] Flame retardant: a mixture of antimony trioxide and decabromodiphenylethane (mass ratio 1:1), dosage 0.3 parts;

[0138] Pigment: Choose according to the required color, the dosage is 0.4 parts;

[0139] Filler: wollastonite, dosage 0.5 part;

[0140] Stabilizer: a mixture of antioxidant and ultraviolet absorber (mass ratio 1:1), dosage 0.2 parts.

[0141] The preparation is the same as Example 1.

[0142] Example 4

[0143] An antistatic polyurethane foam is composed of the following raw materials in parts by weight:

[0144] Polyol components:

[0145] Polyester polyol: a mixture of polycaprolactone diol and polyethylene glycol-adipic acid polyester diol (mass ratio 2:1), average molecular weight 1800, hydroxyl value 45 mg KOH / g, dosage 100 parts;

[0146] Polyether polyol: polypropylene glycol, molecular weight 600, dosage 5 parts;

[0147] Antistatic agent: dodecyl dimethyl benzyl ammonium chloride, dosage 0.5 parts;

[0148] Isocyanate component:

[0149] Aromatic diisocyanate, NCO content 20%, dosage 50 parts;

[0150] catalyst:

[0151] A mixture of triethylamine and dimethylethanolamine (mass ratio 1:1), used in an amount of 0.5 parts;

[0152] Foaming agent:

[0153] Water, dosage 1 part;

[0154] Other additives:

[0155] Flame retardant: antimony trioxide, dosage 0.1 part;

[0156] Pigment: Choose according to the required color, dosage 0.05 parts;

[0157] Filler: mixture of calcium carbonate and talc (mass ratio 1:1), dosage 0.1 part;

[0158] Stabilizer: Antioxidant, dosage 0.05 parts.

[0159] The preparation is the same as Example 1.

[0160] Example 5

[0161] An antistatic polyurethane foam is composed of the following raw materials in parts by weight:

[0162] Polyol components:

[0163] Polyester polyol: poly(1,4-butylene adipate diol), average molecular weight 2500, hydroxyl value 30 mg KOH / g, dosage 100 parts;

[0164] Polyether polyol: polytetramethylene glycol, molecular weight 1500, dosage 50 parts;

[0165] Antistatic agent: dodecyl dimethyl benzyl ammonium chloride, dosage 5 parts;

[0166] Isocyanate component:

[0167] Aliphatic diisocyanate, NCO content 35%, dosage 100 parts;

[0168] catalyst:

[0169] Dibutyltin dilaurate, dosage 1 part;

[0170] Foaming agent:

[0171] Water, dosage 10 parts;

[0172] Other additives:

[0173] Flame retardant: decabromodiphenylethane, dosage 0.3 parts;

[0174] Pigment: Choose according to the required color, dosage 0.5 part;

[0175] Filler: wollastonite, dosage 0.5 part;

[0176] Stabilizer: UV absorber, dosage 0.2 parts.

[0177] The preparation is the same as Example 1.

[0178] Comparative Example

[0179] Commercially available antistatic polyurethane foam (Daye Tengfei D-Foam)

[0180] Test Case

[0181] Test method:

[0182] 1 Surface resistivity test, using a surface resistivity tester, tested according to ASTM D257 standard, under the conditions of 50% humidity and 23°C temperature.

[0183] 2. Ultraviolet aging test: using ultraviolet aging test box, according to ASTM G154 standard test, expressed as the reduction ratio of elongation at break.

[0184] 3 Flame retardant performance test, using a flame retardant performance tester, tested according to UL 94 standard.

[0185] 4Compression strength test, using a universal material testing machine, according to ASTM D1621 standard test.

[0186] 5. Thermal insulation performance test, using a thermal conductivity tester, refer to ISO 8301 (standard method for determination of thermal conductivity).

[0187] The results are shown in Table 1 and Figure 1-3 shown.

[0188] Table 1 Performance test of antistatic polyurethane foam

[0189]

[0190] From the above test examples, it can be seen that the polyurethane foams prepared in Examples 1-5 of the present invention have a lower surface resistivity, which proves that they have good antistatic ability, and at the same time meet the high performance requirements of flame retardancy and heat insulation, and have greater performance advantages in terms of ultraviolet aging and compression strength compared to existing polyurethane foams. In addition, the present invention uses environmentally friendly materials to make antistatic polyurethane foams, and the foams can be recycled, which reduces environmental pollution and conforms to the concept of green and sustainable development. The preparation process is simple and efficient: The preparation method of the present invention is simple and easy to understand, easy to operate, uses water as a foaming agent, and the reaction conditions are mild, which is easy to realize industrial production, reduces production costs, and improves production efficiency.

[0191] The above are only a few preferred embodiments of the present invention, which are described in a more specific and detailed manner, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. An antistatic polyurethane foam, characterized in that: It is composed of the following raw materials in parts by weight: A. Polyol component, comprising: At least one polyester polyol having a molecular weight of 500 to 3000 and a hydroxyl value of 20 to 56 mg KOH / g, which is used to provide the basic structure and elasticity of the foam, based on 100 parts; At least one polyether polyol having a molecular weight of 400 to 2000 and containing at least two hydroxyl groups, used to improve the flexibility and water resistance of the foam, in an amount of 5 to 50 parts; And, an antistatic agent, which is a compound containing a quaternary ammonium salt or a quaternary phosphonium salt structure, is used to impart antistatic properties to the foam, and the amount used is 0.5 to 5 parts; B. Isocyanate component, comprising: At least one aromatic or aliphatic diisocyanate, with an NCO content of 20% to 35%, used to react with the polyol component to form a polyurethane network structure, in an amount of 50-100 parts; C. a catalyst selected from an amine catalyst or an organic metal catalyst, used to accelerate the formation reaction of polyurethane, the amount of which is 0.5 to 1.5 parts; D. a foaming agent, selected from water or an inert gas, the amount of which is adjusted according to the density and porosity of the desired foam; E. Other additives, including but not limited to flame retardants, pigments, fillers and stabilizers, the dosage of which shall be adjusted according to actual needs.

2. The antistatic polyurethane foam according to claim 1, characterized in that: Said A. Polyol component, comprising: Polyester polyol, selected from one or more of polycaprolactone diol, polyethylene glycol-adipate polyester diol or polyadipate-1,4-butylene glycol ester diol, with a molecular weight of 1000 to 2500 and a hydroxyl value of 30 to 50 mg KOH / g, used in an amount of 100 parts; Polyether polyol, selected from one or both of polypropylene glycol and polytetramethylene glycol, with a molecular weight of 600 to 1500 and containing at least two hydroxyl groups, used in an amount of 5 to 50 parts; And, the antistatic agent is selected from quaternary ammonium salt antistatic agents such as dodecyl dimethyl benzyl ammonium chloride, or quaternary phosphonium salt antistatic agents such as the reaction product of trioctyl phosphate and ethanolamine; the dosage is 0.5-5 parts.

3. The antistatic polyurethane foam according to claim 1, characterized in that: Said B. Isocyanate component, comprising: Diisocyanate, selected from one or more of toluene diisocyanate (TDI), diphenylmethane diisocyanate (MDI) or hexamethylene diisocyanate (HDI), with an NCO content of 25% to 32%; used in an amount of 50-100 parts.

4. The antistatic polyurethane foam according to claim 1, characterized in that: Said C. Catalyst, selected from one or more of triethylamine, dimethylethanolamine or dibutyltin dilaurate, used in an amount of 0.5-1.5 parts.

5. The antistatic polyurethane foam according to claim 1, characterized in that: The foaming agent is water, which is used in an amount of 1-10 parts.

6. The antistatic polyurethane foam according to claim 1, characterized in that: The other additives include: Flame retardant, selected from antimony trioxide, decabromodiphenylethane or a mixture thereof, used in an amount of 0.1-0.3 parts; Pigment, choose according to the desired color, the amount is 0.05-0.5 parts; Filler, selected from calcium carbonate, talc or wollastonite, used to enhance the mechanical properties of the foam, with an amount of 0.1-0.5 parts; The stabilizer is selected from antioxidants or ultraviolet absorbers to improve the weather resistance of the foam, and the amount used is 0.05-0.2 parts.

7. The antistatic polyurethane foam according to claim 1, characterized in that: It is composed of the following raw materials in parts by weight: A. Polyol component, comprising: Polyester polyol, selected from one or more of polycaprolactone diol, polyethylene glycol-adipate polyester diol or polyadipate-1,4-butylene glycol ester diol, with a molecular weight of 1000 to 2500 and a hydroxyl value of 30 to 50 mg KOH / g, used in an amount of 100 parts; Polyether polyol, selected from one or both of polypropylene glycol and polytetramethylene glycol, with a molecular weight of 600 to 1500 and containing at least two hydroxyl groups, used in an amount of 5 to 50 parts; And, an antistatic agent selected from quaternary ammonium salt antistatic agents such as dodecyl dimethyl benzyl ammonium chloride, or quaternary phosphonium salt antistatic agents such as the reaction product of trioctyl phosphate and ethanolamine; the amount is 0.5-5 parts; B. Isocyanate component, comprising: At least one aromatic or aliphatic diisocyanate, with an NCO content of 20% to 35%, used to react with the polyol component to form a polyurethane network structure, in an amount of 50-100 parts; C. a catalyst, selected from one or more of triethylamine, dimethylethanolamine or dibutyltin dilaurate, in an amount of 0.5-1.5 parts; D. a blowing agent, wherein the blowing agent is water, used in an amount of 1-10 parts; E. Other additives, Flame retardant, selected from antimony trioxide, decabromodiphenylethane or a mixture thereof, used in an amount of 0.1-0.3 parts; Pigment, choose according to the desired color, the amount is 0.05-0.5 parts; Filler, selected from calcium carbonate, talc or wollastonite, used to enhance the mechanical properties of the foam, with an amount of 0.1-0.5 parts; The stabilizer is selected from antioxidants or ultraviolet absorbers to improve the weather resistance of the foam, and the amount used is 0.05-0.2 parts.

8. The antistatic polyurethane foam according to claim 7, characterized in that: It is composed of the following raw materials in parts by weight: An antistatic polyurethane foam is composed of the following raw materials in parts by weight: Polyol components: Polyester polyol: poly(1,4-butylene adipate diol), average molecular weight 1000, hydroxyl value 50 mg KOH / g, dosage 100 parts; Polyether polyol: a mixture of polypropylene glycol and polytetramethylene glycol, with an average molecular weight of 1000, containing two hydroxyl groups, and a dosage of 40 parts; Antistatic agent: dodecyl dimethyl benzyl ammonium chloride, dosage 4 parts; Isocyanate component: A mixture of aromatic and aliphatic diisocyanates, NCO content 28%, dosage 90 parts; catalyst: Dibutyltin dilaurate, 1.5 parts; Foaming agent: Water, 9 parts; Other additives: Flame retardant: a mixture of antimony trioxide and decabromodiphenylethane, 0.3 parts; Pigment: Choose according to the required color, the dosage is 0.4 parts; Filler: wollastonite, dosage 0.5 part; Stabilizer: A mixture of antioxidant and UV absorber, dosage 0.2 parts.

9. The method for preparing the antistatic polyurethane foam according to any one of claims 1 to 8, characterized in that: The following steps are involved: In a reaction container with heating and stirring functions, the polyol component, isocyanate component, catalyst, foaming agent and other additives are mixed uniformly; under stirring at 100-300 rpm and a temperature of 60-80° C., the mixture is subjected to a polyurethane forming reaction for 30-60 minutes while maintaining normal pressure, cooled to room temperature, and cut as needed to obtain antistatic polyurethane foam.

10. Use of the antistatic polyurethane foam according to any one of claims 1 to 8 in electronic products, characterized in that: The surface resistivity of polyurethane foam is not less than 10 at a relative humidity of 50% and a temperature of 23°C. 6 Ω not more than 10 7 Ω / sq; The antistatic polyurethane foam is used as an internal lining, protective material or packaging material of electronic products to provide one or more of the following functions: a) Antistatic protection: The antistatic polyurethane foam can effectively prevent the static electricity generated during the use of electronic products from damaging electronic components, thereby improving the reliability and service life of electronic products; b) Cushioning and shock absorption: Using the elasticity and resilience of foam to provide effective cushioning and shock absorption effects for electronic products, protecting electronic products from mechanical shock and vibration during transportation, storage and use; c) Heat insulation: The antistatic polyurethane foam has good heat insulation performance, which can block the influence of external heat on the internal components of the electronic product to a certain extent, while keeping the temperature inside the electronic product stable; d) Sound insulation and noise reduction: The porous structure of the foam has a certain sound insulation effect, which can reduce the noise generated by electronic products during use and improve the user experience; e) Environmentally friendly and recyclable: the antistatic polyurethane foam is made of environmentally friendly materials and can be recycled to reduce environmental pollution.

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