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Three-prevention paint for printed circuit board with high salt fog resistance

A printed circuit board, high salt spray resistance technology, applied in coatings and other directions, can solve the problems of poor salt spray resistance, short protection period, toxic and harmful, and improve hydrophobicity and salt spray resistance. , The effect of improving the safety of use and prolonging the service life

Active Publication Date: 2016-05-04
SHENZHEN NEWOLL NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing three anti-paints mainly have defects such as short protection period, poor salt spray resistance, strong smell, poisonous and harmful in the actual use process.

Method used

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  • Three-prevention paint for printed circuit board with high salt fog resistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 300 parts of linseed oil fatty acid, 120 parts of dehydrated castor oil fatty acid, and 75 parts of pentaerythritol into the reaction kettle, start stirring, heat up to 180°C-250°C for high-temperature dehydration treatment until the acid value is 8mgKOH / g, stop the reaction, and cool down to 60 °C, an unsaturated resin was obtained.

[0027] Take 80 parts of the above-mentioned unsaturated resin and 45 parts of p-methylstyrene, put them into the reaction kettle, raise the temperature to 125°C, react at a constant temperature, add 1.8 parts of tert-butylperoxytrimethylcyclohexane dropwise at a constant rate, drop After adding time for 3 hours, take 4 parts of hexafluorobutyl methacrylate and 1.8 parts of tert-butyl peroxytrimethylcyclohexane, mix evenly, add dropwise to the reaction kettle at a constant speed, drop for 3 hours, and then react at constant temperature , to obtain a resin sample; take the resin sample and dilute it with a low-boiling dearomatized hydro...

Embodiment 2

[0029] Add 230 parts of linseed oil fatty acid, 180 parts of soybean oil fatty acid, 160 parts of dehydrated castor oil fatty acid, 25 parts of pentaerythritol, and 80 parts of trimethylolpropane into the reaction kettle, start stirring, and heat up to 180°C to 250°C for high-temperature dehydration treatment to The acid value was 20 mgKOH / g, the reaction was stopped, and the temperature was lowered to 60° C. to obtain an unsaturated resin.

[0030] Take 150 parts of unsaturated resin and 138 parts of p-methylstyrene, add them to the reaction kettle, raise the temperature to 125°C, and react at a constant temperature, add 4.5 parts of tert-butyl peroxybenzoate dropwise at a constant rate for 3 hours, and then Take 12 parts of trifluoroethyl methacrylate and 4.5 parts of tert-butyl peroxybenzoate, mix evenly, add dropwise to the reaction kettle at a constant speed, and the dropwise addition time is 3 hours, and then react at a constant temperature to obtain a resin sample; take ...

Embodiment 3

[0032] Add 450 parts of linseed oil fatty acid, 220 parts of soybean oil fatty acid, 300 parts of dehydrated castor oil fatty acid, 140 parts of pentaerythritol into the reaction kettle, start stirring, heat up to 180 ℃ ~ 250 ℃ high temperature dehydration treatment until the acid value is 30mgKOH / g, stop React and lower the temperature to 60°C to obtain an unsaturated resin.

[0033] Take 200 parts of unsaturated resin and 250 parts of p-methylstyrene, put them into the reaction kettle, raise the temperature to 125°C, react at constant temperature, add 3.75 parts of tert-butyl peroxybenzoate dropwise at a constant speed for 3 hours, and then Take 8 parts of dodecafluoroheptyl methacrylate and 3.75 parts of tert-butyl peroxybenzoate, mix evenly, add dropwise to the reaction kettle at a constant speed, dropwise for 3 hours, and then react at a constant temperature to obtain a resin sample; The above resin sample is diluted with low boiling point dearomatized hydrocarbon solvent...

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Abstract

The invention discloses three-prevention paint for a printed circuit board with high salt fog resistance. The three-prevention paint is prepared by mixing modified resin with drier accounting for 0.5-2.0% of modified resin at a high speed for 30-120 minutes. Modified resin is prepared from raw materials such as unsaturated resin, p-methylstyrene, fluorinated acrylate, dearomatization solvent oil and initiator, and unsaturated resin is prepared from raw materials such as pentaerythritol and / or trihydric alcohol and unsaturated fatty acid. The hydrophobicity performance and salt fog resistance of the prepared three-prevention paint resin are remarkably improved, the prepared three-prevention paint can be used for protecting the circuit board and relevant devices against corrosion of the environment, and the service life of a product is prolonged; the obtained three-prevention paint product does not contain aromatic solvent such as benzene, methylbenzene and xylene, the damage of aromatic solvent to the environment and human bodies is reduced, the use safety of the product is improved, production cost is reduced, the environment protection requirement is met, and the paint conforms to the European Union RoHS standard.

Description

technical field [0001] The invention relates to the technical field of conformal paint, in particular to a conformal paint for printed circuit boards with high salt spray resistance. Background technique [0002] With the rapid development of the economy, electronic products spread out in daily life, and gradually turn to miniaturization, integration and multi-function. In the actual use process, the use environment is complex and diverse, such as: humidity, salt spray, corrosion, high dust, high heat, low temperature, oil mist, vibration and other harsh environments. The circuit board is the core component of electronic products. The protection of the circuit board will quickly cause corrosion, deformation, mildew, aging and other problems, which will eventually lead to the failure of the circuit board and the failure of the product. [0003] As a conformal coating with a special formula, the conformal paint is coated on the surface of the circuit board to form a transpare...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D151/08C08F283/01C08F212/12C08F220/22
CPCC08F283/01C09D151/08C08F212/12
Inventor 朱伟
Owner SHENZHEN NEWOLL NEW MATERIAL CO LTD
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