Halogen-free PCB board special-purpose solder mask stripping agent, and preparation method and applications thereof

A technology of PCB board and stripping agent, which is applied in the field of special solder resist green paint stripping agent for halogen-free PCB board and its preparation field, can solve the problem of poor removal effect of polymer residues, difficult treatment of polymer pollutants, and no pollution. Halogen PCB board has problems such as poor alkali resistance, and achieves the effect of not easy to reveal the texture, good peeling effect, and not easy to damage the copper surface.
CN109880432AActive Publication Date: 2019-06-14上海富柏化工有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
上海富柏化工有限公司
Publication Date
2019-06-14

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Abstract

The invention discloses a halogen-free PCB board special-purpose solder mask stripping agent, and a preparation method and applications thereof. The halogen-free PCB board special-purpose solder maskstripping agent comprises, by mass, 20 to 30% of an organic base, 3 to 8 % of an organic solvent, 0.1 to 1.0 % of a surfactant, 0.1 to 1.0 % of an organic solderability preservative, and the balance water. The halogen-free PCB board special-purpose solder mask stripping agent possesses excellent stripping effect, is suitable for stripping of a plurality of kinds of PCB board solder masks, and is especially excellent in stripping effect on halogen-free PCB board solder mask; when the halogen-free PCB board special-purpose solder mask stripping agent is adopted for solder mask peeling, texture exposure and white spot are not easily caused, after processing, PCB board cooper surface damage is avoided, no blacking is caused, halogen-free PCB board solder mask stripping reworking qualified yield is increased greatly, no obvious solid residue is detected in waste liquid obtained through processing, no obvious residue attached onto liquid tank internal walls is detected, production equipmentcleaning maintenance cost is reduced greatly. The invention also discloses the preparation method and applications of the halogen-free PCB board special-purpose solder mask stripping agent.
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Description

technical field

[0001] The invention belongs to the technical field of solder resist green paint strippers for printed circuit boards, and more specifically relates to a special solder resist green paint stripper for halogen-free PCB boards and its preparation method and application. Background technique

[0002] Halogen refers to the seventh group (VIIA) non-metallic elements in the periodic table: fluorine (Fluorine), chlorine (Chlorine), bromine (Bromine), iodine (Iodine) and astatine (Astatine) five elements, collectively referred to as halogen. These halogen elements are often used in plastic additives, flame retardants, and organic solvents for industrial products such as cable sheaths, PCBs, electrical casings, and coatings. For example, adding a small amount of halogen-containing flame retardants to PCB substrates or solder resist green paints , It can greatly improve the flame retardancy level of PCB. This kind of PCB containing halogen is called halogen PCB. [0...

Claims

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