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A micron-level strong salt spray and water-repellent circuit board conformal paint

A salt-spray-resistant, micron-scale technology, applied in the direction of fire-resistant coatings, coatings, etc., can solve the problems of applying conformal coatings to substances without perfluoropolyether chains

Active Publication Date: 2020-05-15
太仓中化环保化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, there is no literature report on the application of substances with perfluoropolyether chains in conformal paints.

Method used

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  • A micron-level strong salt spray and water-repellent circuit board conformal paint
  • A micron-level strong salt spray and water-repellent circuit board conformal paint
  • A micron-level strong salt spray and water-repellent circuit board conformal paint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] This embodiment provides a three-proof paint, which is prepared through the following steps:

[0056] (1) Preparation of perfluoropolyether modified acrylate polymer:

[0057] In a 500mL four-necked flask equipped with a thermometer, reflux condenser and nitrogen replacement, add 50.00g CF 3 CF 2 CF 2 O[CF(CF 3 )CF 2 O] 8.7 CF(CF 3 )CH 2 CH 2 OC(O)C(CH 3 )=CH 2 , 14.00g butyl acrylate, 34.00g cyclohexyl methacrylate, 1.00g methacrylic acid, 1.00g azobisisobutyronitrile initiator and 233.00g nonafluorobutyl ethyl ether solvent. After replacing with nitrogen, the oil bath was heated to 75°C and reacted for 10 hours. After the reaction is completed, a polymer product with a solid content of 30% is obtained.

[0058] (2) Preparation of three anti-paints:

[0059] The polymer product with a solid content of 30% prepared in step (1) is diluted to 2% with nonafluorobutyl methyl ether to obtain a conformal paint.

[0060] The three-proof paint prepared in this embodiment is sprayed on ...

Embodiment 2

[0062] This embodiment provides a three-proof paint, which is prepared through the following steps:

[0063] (1) Preparation of perfluoropolyether modified acrylate polymer:

[0064] In a 500mL four-necked flask equipped with a thermometer, reflux condenser and nitrogen replacement, add 50.00g CF 3 CF 2 CF 2 O[CF(CF 3 )CF 2 O] 9.2 CF(CF 3 )CH 2 CH 2 OC(O)CH=CH 2 , 14.00g octyl acrylate, 34.00g benzyl methacrylate, 1.00g methacrylic acid, 1.00g azobisisobutyronitrile initiator and 233.00g nonafluorobutyl ethyl ether solvent. After replacing with nitrogen, the oil bath was heated to 75°C and reacted for 10 hours. After the reaction is completed, a polymer product with a solid content of 30% is obtained.

[0065] (2) Preparation of three anti-paints:

[0066] The polymer product with a solid content of 30% prepared in step (1) is diluted to 5% with nonafluorobutyl methyl ether to obtain a conformal paint.

[0067] The three-proof paint prepared in this embodiment is sprayed on the circui...

Embodiment 3

[0069] This embodiment provides a three-proof paint, which is prepared through the following steps:

[0070] (1) Preparation of perfluoropolyether modified acrylate polymer:

[0071] In a 500mL four-neck flask equipped with a thermometer, reflux condenser and nitrogen replacement, add 60.00g CF 3 CF 2 CF 2 O[CF(CF 3 )CF 2 O] 21.1 CF(CF 3 )CON(H)CH 2 CH 2 OC(O)C(CH 3 )=CH 2 , 4.00g lauryl acrylate, 34.00g isobornyl methacrylate, 1.00g acrylic acid, 1.00g azobisisobutyronitrile initiator and 233.00g nonafluorobutyl ethyl ether solvent. After replacing with nitrogen, the oil bath was heated to 75°C and reacted for 10 hours. After the reaction is completed, a product with a solid content of 30% is obtained.

[0072] (2) Preparation of three anti-paints:

[0073] The polymer product with a solid content of 30% prepared in step (1) is diluted to 10% with nonafluorobutyl methyl ether to obtain a conformal paint.

[0074] The three-proof paint prepared in this embodiment is sprayed on the cir...

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Abstract

The invention relates to a micron-level strong salt spray and water-repellent conformal paint for circuit boards, which contains a perfluoropolyether-modified acrylate polymer, and the perfluoropolyether-modified acrylate polymer includes the following structural units: (A) the structural unit provided by the perfluoropolyether derivative monomer represented by general formula I, (B) the structural unit provided by the acrylate derivative monomer not containing fluorine atoms, (C) a ring-shaped A structural unit of the structure and (D) a structural unit with a polar group; wherein, CF 3 CF 2 CF 2 O[CF(CF 3 ) CF 2 O] n CF(CF 3 )‑Y‑C(R 1 )=CH 2 (I), in formula I, n is 5~50, R 1 is hydrogen or a saturated alkane with 1 to 4 carbons; Y is a linking group. The perfluoropolyether modified acrylate polymer used to prepare the conformal paint of the present invention introduces side chains as perfluoropolyether-based chains on the polymer chain, and the polymer also introduces polar groups and cyclic groups. Group and other groups, the prepared conformal paint has strong salt spray resistance, high temperature resistance, heat and humidity resistance and excellent water repellency.

Description

Technical field [0001] The invention relates to the technical field of printed circuit board protection, in particular to a micron-level strong salt spray and water-repellent circuit board tri-proof paint and a preparation method thereof. Background technique [0002] Three anti-paint is a kind of specially formulated paint, used to protect circuit boards and related equipment from environmental erosion. The three-proof paint is coated on the surface of the circuit board to form a transparent protective film. The protective film can protect the circuit board from damage in environments such as humidity, salt spray, chemical corrosion, high dust, and vibration, and improve the performance of the circuit board. Reliability increases the safety factor of the entire electronic component. Thereby improving and extending their service life, ensuring the safety and reliability of use. In order to improve the water repellency of the three-proof paint, people often introduce perfluoroal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D151/08C08F283/06C08F220/18C08F220/06C08F220/20C08F230/02
CPCC09D151/08C08F283/065C09D5/18C08F220/1808C08F220/1807C08F220/06C08F220/1804C08F220/1806C08F220/1818C08F220/20C08F220/1811C08F230/02C08F220/1812
Inventor 姜维梁成锋盛磊张航文梁浩宇艾显虎
Owner 太仓中化环保化工有限公司
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