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Polyurethane hydrophobic film as well as preparation method and application thereof

A technology of hydrophobic film and polyurethane, which is applied in transportation and packaging, removable outer sheaths, vehicle parts, etc. It can solve the problems of complex production process of invisible car coating film, achieve excellent hydrophobicity and weather resistance, and enhance antifouling , The effect of improving the mechanical properties

Active Publication Date: 2020-08-25
北京浦江兄弟科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above problems, the present invention provides a polyurethane hydrophobic film, which can overcome the defects of complex production process of the existing invisible car coating film, and has excellent antifouling self-cleaning ability, mechanical properties and weather resistance

Method used

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  • Polyurethane hydrophobic film as well as preparation method and application thereof
  • Polyurethane hydrophobic film as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A kind of polyurethane hydrophobic film, comprises the raw material of following weight part:

[0041] Aliphatic TPU particles: 88.6 parts by weight, hardness 80Shore A

[0042] Hydrophobic crosslinking agent: 10 parts by weight

[0043] Antioxidant: composite antioxidant B215, 0.6 parts by weight,

[0044] UV absorber: UV571, 0.8 parts by weight,

[0045] The preparation method of above-mentioned polyurethane hydrophobic film comprises the following steps:

[0046] 1) Preparation of hydrophobic cross-linking agent:

[0047] Heat 38.8g of silicone polyether diol (hydroxyl value: 50mgKOH / g, molecular weight: 2000) in a reactor to 105°C, remove water under reduced pressure for 2 hours, then feed nitrogen into the reactor, and lower the temperature at normal pressure After reaching 50°C, add 61.2g of dicyclohexylmethane diisocyanate, control the prepolymerization temperature to 90°C, and react for 2.5 hours to obtain a polyurethane prepolymer with an -NCO content of 18...

Embodiment 2

[0053] A kind of polyurethane hydrophobic film, comprises the raw material of following weight part:

[0054] Aliphatic TPU particles: 90 parts by weight, hardness 85Shore A

[0055] Hydrophobic crosslinking agent: 9 parts by weight

[0056] Antioxidant: composite antioxidant B225, 0.5 parts by weight

[0057] Ultraviolet absorber: UV1140, 0.5 parts by weight,

[0058] The preparation method of above-mentioned polyurethane hydrophobic film comprises the following steps:

[0059] 1) Preparation of hydrophobic cross-linking agent:

[0060] Heat 41.5g of silicone polyether diol (hydroxyl value: 51mgKOH / g, molecular weight: 2200) in a reactor to 100°C, remove water under reduced pressure for 2 hours, then feed nitrogen into the reactor, After cooling down to 50°C, add 58.5g of dicyclohexylmethane diisocyanate, control the prepolymerization temperature to 80°C, and react for 2.5 hours to obtain a polyurethane prepolymer with an -NCO content of 17% by weight, that is, a hydropho...

Embodiment 3

[0066] A kind of polyurethane hydrophobic film, comprises the raw material of following weight part:

[0067] Aliphatic TPU particles: 91 parts by weight, hardness 90Shore A

[0068] Hydrophobic crosslinking agent: 8 parts by weight

[0069] Antioxidant: composite antioxidant B225, 0.5 parts by weight

[0070] Ultraviolet absorber: UV571, 0.5 parts by weight

[0071] The preparation method of above-mentioned polyurethane hydrophobic film comprises the following steps:

[0072] 1) Preparation of hydrophobic cross-linking agent:

[0073] Heat 44.5g of silicone polyether diol (hydroxyl value 50mgKOH / g, molecular weight 2000) in a reactor to 110°C, remove water under reduced pressure for 2 hours, then feed nitrogen into the reactor, and lower the temperature at normal pressure After reaching 50°C, add 55.5g of dicyclohexylmethane diisocyanate, control the prepolymerization temperature to 80°C, and react for 2.5 hours to obtain a polyurethane prepolymer with an -NCO content of ...

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Abstract

The invention provides a polyurethane hydrophobic film as well as a preparation method and application thereof. The polyurethane hydrophobic film is prepared from the following raw materials, by weight: 88 to 98 parts of aliphatic TPU particles, 1-10 parts of hydrophobic cross-linking agents, and 0.5-2 parts of auxiliary agents. The tensile strength of the polyurethane hydrophobic film is 20-45 Mpa, the tearing strength of the polyurethane hydrophobic film is 60-110 N / mm, the hardness of the polyurethane hydrophobic film is 80-98 shore A, and the contact angle theta between the polyurethane hydrophobic film and water is 110-130 degrees. The polyurethane hydrophobic film disclosed by the invention can overcome the defect of complex production process of the existing invisible car cover film, and has excellent antifouling self-cleaning capability, mechanical property and weather resistance.

Description

technical field [0001] The invention belongs to the field of invisible car coating films, and in particular relates to a polyurethane hydrophobic film used for invisible car coating films and a preparation method thereof. Background technique [0002] During the actual use of the car, sand, dust, acid rain, pollutants, etc. in the environment will cause damage to the car paint, such as impact and corrosion, which will lead to damage, cracking and dissolution of the car paint. The traditional protective measures are waxing and polishing on the surface of the car paint. This method requires the car to go to the maintenance agency for maintenance on a regular basis, which not only brings trouble to the car owner, but also increases the financial burden of the car owner. Therefore, in order to reduce the number of times the car goes to the maintenance agency for maintenance, most car owners will extend the use of invisible car film after purchasing a new car. At present, the ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08L75/08C08J5/18C08J3/24B60J11/00C08G18/75C08G18/50
CPCC08J5/18C08J3/246B60J11/00C08G18/758C08G18/5096C08J2375/04C08J2475/08
Inventor 王晨怡姜媛庄田雨陈建君王亦可王亦加庄润禾
Owner 北京浦江兄弟科技有限公司
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