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Conformal coating for protecting printed circuit board, preparation method and curing method thereof

A printed circuit board and overlay technology, which is applied in the field of overlay coating and its preparation, can solve the problems of inability to cure, limit the application of circuit boards, and the inability of effective protection of circuit boards to achieve excellent adhesion and excellent Adhesive effect

Inactive Publication Date: 2013-02-27
NANTONG GAOMENG NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current UV-curable overlay coating cannot be fully cured in shadowed areas, and cannot effectively protect circuit boards, which limits its application to irregular printed circuit boards, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This embodiment provides a kind of coating used for protecting printed circuit boards, which is a kind of light and moisture curing coating used for protecting printed circuit boards. The coating includes the following components by mass percentage :

[0028] Raw material mass percentage (%)

[0029] Polyurethane Acrylic 60

[0030] Ethoxylated trimethylolpropane triacrylate (reactive diluent) 10

[0031] 1,6-hexanediol diacrylate (reactive diluent) 15.45

[0032] Tripropylene glycol diacrylate (reactive diluent) 10

[0033] 2-Hydroxy-2-methyl-1-phenyl-1-propanone (photoinitiator) 4

[0034] BYK-333 (leveling agent for additives) produced by BYK, Germany 0.15

[0035] Dabco T12 (auxiliary drier) produced by Deqian Hemings Company 0.35

[0036] Tinopal OB (fluorescent agent in auxiliary agent) produced by Swiss Ciba Fine Chemicals 0.05;

[0037] The polyurethane acrylic resin used in the above-mentioned covering coating adopts the polyurethane acrylate with double...

Embodiment 2

[0057] This embodiment provides a kind of coating used for protecting printed circuit boards, which is a kind of light and moisture curing coating used for protecting printed circuit boards. The coating includes the following components by mass percentage :

[0058] Raw material mass percentage (%)

[0059] Polyurethane Acrylic 63

[0060] Ethoxylated trimethylolpropane triacrylate (reactive diluent) 20

[0061] 1,6-hexanediol diacrylate (reactive diluent) 5

[0062] Tripropylene glycol diacrylate (reactive diluent) 5

[0063] 2-Hydroxy-2-methyl-1-phenyl-1-propanone (photoinitiator) 5.45

[0064] Levaslip 836 (leveling agent for additives) produced by Deqian Hemings 0.5

[0065] Dabco 120 (drying agent for additives) produced by American Air Chemical Company 1

[0066] Tinopal OB (fluorescent agent for additives) produced by Swiss Ciba Specialty Chemicals 0.05

[0067] The polyurethane acrylic resin used in the above-mentioned covering coating adopts the polyurethane ac...

Embodiment 3

[0087] This embodiment provides a kind of coating used for protecting printed circuit boards, which is a kind of light and moisture curing coating used for protecting printed circuit boards. The coating includes the following components by mass percentage :

[0088] Raw material mass percentage (%)

[0089] Urethane Acrylic 30

[0090] Ethoxylated trimethylolpropane triacrylate (reactive diluent) 25

[0091] 1,6-Hexanediol Diacrylate (HDDA) (reactive diluent) 25

[0092] Tripropylene glycol diacrylate (TPGDA) (reactive diluent) 10

[0093] 1-Hydroxy-cyclohexyl benzophenone (photoinitiator) 8

[0094] Levaslip 810 (leveling agent for additives) produced by Deqian Hemings Company 0.45

[0095] Dabco T12 (auxiliary drier) produced by American Air Chemical Company 0.45

[0096] Tinopal OB (fluorescent agent for additives) produced by Swiss Ciba Specialty Chemicals 0.1

[0097] The polyurethane acrylic resin used in the above-mentioned covering coating adopts the polyurethan...

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Abstract

The invention discloses a conformal coating for protecting a printed circuit board, a preparation method and a curing method thereof, belonging to the field of printed circuit board protection materials. The conformal coating comprises the following components in percentage by weight: 31-63 percent of polyurethane-acrylic ester resin, 30-60 percent of active diluent, 4-8 percent of photoinitiator and o.55-1.55 percent of auxiliary agent. The conformal coating contains no solvent, cannot cause pollution due to solvent volatilization and is environmentally-friendly. Moreover, after the conformal coating is irradiated and quickly cured through ultraviolet light, the conformal coating can be continuously subjected to moisture curing, thus the optimal property of the conformal coating can be ensured even if the conformal coating is in a place with a shadow.

Description

technical field [0001] The invention relates to the field of protective materials for printed circuit boards, in particular to a coating for protecting printed circuit boards, a preparation method and a curing method thereof. Background technique [0002] As an important part of printed circuit board (PCB), circuit board coating is a specially formulated coating used to protect circuit boards and related equipment from environmental erosion, thereby improving and prolonging their durability. The service life ensures the safety and reliability of use. Under realistic conditions, such as chemical environment (fuel, coolant, etc.), vibration, high dust, salt spray, humidity and high temperature, etc., the circuit board may have corrosion, softening, deformation, mildew and other problems, resulting in circuit board circuit failure . The coating is applied on the surface of the circuit board to form a light and flexible film with a thickness of about 25-50 microns. It protect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/16C08G18/67
Inventor 邓煜东王子平张继德
Owner NANTONG GAOMENG NEW MATERIAL
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