products >> conformal/permanent coatings (group 1 of report manual)  
  Survey group 1: Conformal/permanent coatings for printed circuits and assembled pcbs/flat packs  
 

 

  
 

1. Application information sheets

2. Dewatering fluids and water-dipping varnishes
3. Solder flux lacquers for non-assembled pcbs
4. Conformal/permanent coatings for assembled pcbs
6. Silicone conformal/permanent coatings and thick-film lacquers

 
     
 

You will find further information to the indicated products (Index SL = conformal/permanent coating) under the "links" to the technical reports (TR), application information sheets (AI) and UL-lists (UL). For more extensive advice our application technology departement (ATD) is at your disposal any time.

Here you will get the print version of the survey report for group  1 "Conformal/permanent coatings for printed circuits, and assembled pcbs/flat packs".

  = registered trademark of Underwriters Laboratories Inc.; Northbrook, Illinois 60062

  
  _  

1. Application information sheets

 

Application Information sheets (AI) apply to various lacquers/lacquer series?and supplement the Technical Reports on these lacquers by giving detailed explanations of possible application procedures and individual process steps plus offering numerous practical tips and advice to safeguard the optimum processing of our products.

The associated Technical Reports provide ?in a concise and clear manner ?numerous characteristics and processing data in transparent diagrams, graphics and tables.

Currently the following application information sheets for group 1 are available:

AI 1/1 "Processing instructions for the conventional physically drying/oxidative curing conformal/permanent coatings of the series?SL 1300 to SL 1309 N"

AI 1/2 "Processing instructions for thick film lacquers of the series TWIN-CURE".

  _  
  2. Dewatering fluids and water dipping agents   
     
  2.1 General characteristics
  • dewatering and drying of printed circuits in one process step
  • integrated tarnish protection for all metal substrates, especially suitable for copper, tin and lead/tin
  • for use after etching and/or after deoxidisation of pcbs coated with solder resists.
 		 
  2.2?? Product-specific characteristics
 		  
 

Product (series)
 

Special properties

Dewatering fluid
SL 1000, colourless
  • dewatering agent
  • application: dipping
    •
  • corrosion and tarnish protection: approx. 3 - 6 weeks

Water-dipping agent
SL 1100, colourless
  • dewatering agent
  • application: dipping
    •
  • corrosion and tarnish protection: at least 10 months
 
  _  
  3. Solder flux lacquers for non-assembled pcbs       
     
  3.1 General characteristics
  • maintain the solderability of bare pcbs
  • reliably prevent oxidation of copper conductors and are simultaneously a soldering aid
  • fast drying already at room temperature
  • already very good solderability at 215 ? [419 ?].
 		 
  3.2?? Product-specific characteristics
 		  
 

Product (series)
 

Special properties

Solder flux lacquers of the series SL 1230, yellowish transparent

SL 1230
SL 1231
SL 1230 L
SL 1232 L
SL 1234 L
SL 1232
SL 1234
SL 1235
SL 1236
  • protective and preservative lacquers for bare pcbs based on modified colophonium resin
  • application by means of dip coating: SL 1230, SL 1231, SL 1230 L thru SL 1234 L
  • application by means of roller coating: SL 1232 thru SL 1236
  • index L = suitable for the application on peelable solder masks
  • the higher the last digit the higher the solids content and viscosity so that different dry film thicknesses can be achieved
  • completely clear transparent lacquer layer after curing
 
  _  
  4. Conformal/permanent coatings for assembled pcbs/flat packs       
     
  4.1 General characteristics
  • excellent protection against corrosion
  • extremely low risk of dissolving components and marking inks
  • very good dielectric properties and very high tracking resistance
  • thermal class B = 130 ? [266 ?]
  • can be soldered-through at soldering iron temperature for repair purposes
  • colourless transparent and/or fluorescent (Index FLZ) adjustments enable the completeness of the coating to be easily controlled under day or UV light (black light)
  • partially special adjustments (e.g. SL 1331 N/23) for the processing by means of selective coating units are available

Please observe the indications in our application information sheet AI 1/1 (see also Item 1)

  
  4.2     Product-specific characteristics
 		  
 

Product (series)
 

Special properties
 
Insulating and encapsulating sprays of the series SL 1300 S

SL 1300 S, colourless transp.
SL 1360 S, green transparent
 
  • base: modified polyurethane resins (PUR)
  • insulating and encapsulating lacquer in spray cans, index S = spray can (CFC free propellant)
  • ideal for pilot or low volume production as well as for repair purposes
Conformal/permanent coatings of the series SL 1301 ECO-FLZ, colourless transp.

SL 1301 ECO-FLZ
SL 1301 ECO-FLZ/17
SL 1301 ECO-FLZ/20
  • base: modified polyurethane resins (PUR)
  • application: brushing, spraying, dipping, selective coating processes
  • index ECO = ecological
  • free of aromatic solvents, such as benzene, toluene, xylene and C9 aromates
  • fulfil the requirements of the "lead-free regulation" (EU vehicle end-of-life directive 2000/53/EC): free of lead, cadmium, chromium (IV) and mercury compounds
  • comply with the United States?EPA 33/50 program*
  • do not contain any substances listed in the RoHS directive 2002/95/EC**
  • approved and used by leading suppliers of the automotive industry
  • excellent wetting even of angular component leads
  • identical resin backbone to the SL 1301 N series
  • UL approval: best flame class V-0 acc. to UL 94, Approbation No. File E 80315
  • index /20 = 20 s flow time (DIN 53 211, 4 mm at 20 ? [68 ?]), applies in the same manner to /17
Conformal/permanent coatings of the series SL 1301 N

SL 1301 N, colourless transp.
SL 1301 N-FLZ, "
SL 1301 N-FLZ/23, "
SL 1331 N, red transp.
SL 1331 N/23, red transp.
SL 1331 N/25, red transp.
SL 1331 N/40, red transp.
SL 1331 HV, red transp.
SL 1331 N-LF, red transp.
 
  • base: modified polyurethane resins (PUR)
  • application: brushing, spraying, dipping, selective coating processes; SL 1331 HV: dispenser (index HV = highly viscous adjustment)
  • approved and/or stipulated by leading car manufacturers
  • excellent wetting even of angular component leads (index N = wetting agent)
  • SL 1331 N-LF is lead-free (Index LF = lead-free), fulfils the requirements of the "lead-free regulation" (EU vehicle end-of-life directive 2000/53/EC), only suitable for use on selective spray coating machines with double-sided application
  • UL approval for SL 1331 N: best flame class V-0 acc. to UL 94, Approbation No. File E 80315
  • /23 = 23 s flow time (DIN 53 211, 4 mm at 20 ? [68 ?]); likewise /25 and /40
Conformal/permanent coating SL 1304 FLZ/45, colourless transp.
  • base: polyurethane resins (PUR)
  • application: brushing, spraying, dipping, selective coating processes
  • fast physical drying at room temperature
  • excellent adhesion to hybrid circuits
  • fulfils the requirements of the "lead-free regulation" (EU vehicle end-of-life directive 2000/53/EC): free of lead, cadmium, chromium (VI) and mercury compounds
  • can be removed completely with thinner V 1304 for repair purposes
  • index /45 = 45 s flow time (DIN 53 211, 4 mm at 20 ? [68 ?])
    •
Conformal/permanent coatings of the series SL 1305 AQ, colourless transp.

SL 1305 AQ
SL 1305 AQ/25
SL 1305 AQ/55
SL 1305 AQ-FLZ
SL 1305 AQ/25-FLZ

FK 1335 AQ, red
FK 1345 AQ, black
FK 1355 AQ, blue
FK 1365 AQ, green
  • base: polyurethane resins (PUR)
  • application: brushing, spraying, dipping, selective coating processes
  • solvents are nearly completely replaced by water
  • index AQ = water borne (aqua)
  • no odour annoyance during coating and further processing
    •
  • extremely fast drying at room temperature
  • fulfil the requirements of the "lead-free regulation" (EU vehicle end-of-life directive 2000/53/EC): free of lead, cadmium, chromium (VI) and mercury compounds
  • comply with the United States?EPA 33/50 program*
  • do not contain any substances listed in the RoHS directive 2002/95/EC**
    •
  • good yellowing resistance
  •  UL approval of the fluorescent adjustments (Index FLZ) as conformal coating, best flame class V-0 acc. to UL 94, Approbation no. file E 80315
  • index /25 = 25 s flow time (DIN 53 211, 4 mm at 20 ? [68 ?]), likewise /25
  • index FK = dye concentrate to dye coatings of the series SL 1305 AQ, on account of the significant colour contrast to the substrate the coating can be easily controlled for completeness
    •
Conformal/permanent coatings of the series SL 1306 N

SL 1306 N, colourless transp.
SL 1306 N-FLZ, "
SL 1306 N-FLZ/23, "
SL 1336 N, red transp.
SL 1366 N, green-transp.
  • base: modified acrylic resins
  • application: brushing, spraying, dipping selective coating processes
  • when using no-clean fluxes also suitable as protective lacquers for un-cleaned pcbs
  • excellent wetting even of angular component leads (index N = wetting agent)
  • low odour
  • excellent condensation and climatic resistance, especially with surface dewing
  • fulfil the requirements of the "lead-free regulation" (EU vehicle end-of-life directive 2000/53/EC): free of lead, cadmium, chromium (VI) and mercury compounds
  • do not contain any substances listed in the RoHS directive 2002/95/EC**
    •
  •  UL approval for SL 1306 N and SL 1306 N-FLZ: best flame class V-0 acc. to UL 94, Approbation No. File E 80315
  • index /23 = 23 s flow time (DIN 53 211, 4 mm at 20 ? [68 ?])
    •
Conformal/permanent coatings of the series SL 1307

SL 1307, colourless transp.
SL 1307 MS, colourless transp.
SL 1337, red-transp.
SL 1367, green-transp.
SL 1367 MS-FLZ-FE/22, green transparent, fluorescent
  • base: polyacrylic resins
  • application: brushing, selective coating processes (spraying, dipping)
  • very fast physical drying at room temperature, but only partially suitable for dip and spray coating. On account of its retarded drying SL 1307 MS is suitable for all processes (index MS = moderate boiling solvent: retarded drying and simultaneously increased flow)
  • good yellowing resistance
  • fulfil the requirements of the "lead-free regulation" (EU vehicle end-of-life directive 2000/53 EC): free of lead, cadmium, chromium (VI) and mercury compounds
  • do not contain any substances listed in the RoHS directive 2002/95/EC**
  • SL 1367 MS-FLZ-FE/22 is mould resistant acc. to MIL-STD-810 E (index FE = fungicide adjustment)
  • can be completely removed for repair purposes with thinner V 1307
    •
  • /22 = 22 s flow time (DIN 53 211, 4 mm at 20 ? [68 ?])
    •
Conformal/permanent coating SL 1308 FLZ, colourless transp.
  • base: modified epoxy resins (EP)
  • application: brushing, spraying, dipping, selective coating processes
  • fulfils the requirements of the "lead-free regulation" (EU vehicle end-of-life directive 2000/53 EC): free of lead, cadmium, chromium (VI) and mercury compounds
  • fungicidal additives protect against mould formation, suitable for tropical climates
  • conformal/permanent coating acc. to MIL-V-173 C
Conformal/permanent coatings of the series SL 1309 N

SL 1309 N, colourless transp.
SL 1309 N/23, colourless transp
SL 1309 N-FLZ, "
SL 1309 N-FLZ/16, "
SL 1309 N-FLZ/19, "
SL 1309 N-FLZ/23, "
SL 1339 N, red transp.
SL 1339 N/23, red transp.
SL 1369 N, green transp.
  • base: modified acrylic resins
  • application: brushing, spraying, dipping, selective coating processes
  • when using no-clean fluxes also suitable as protective coatings for un-cleaned pcbs
  • excellent wetting even of angular component leads (index N = wetting agent)
  • extraordinary adhesion to nearly all substrates
  • fulfil the requirements of the "lead-free regulation" (EU vehicle end-of-life directive 2000/53/EC): free of lead, cadmium, chromium (VI) and mercury compounds
  • do not contain any substances listed in the RoHS directive 2002/95/EC**
  • SL 1309 N-FLZ is mould resistant acc. to MIL-STD-810 E
  • index /23 = 23 s flow time (DIN 53 211, 4 mm at 20 ? [68 ?]); likewise /16 and /19
Conformal/permanent coatings of the series SL 1309 N-S

SL 1309 N-S, colourless transp.
SL 1339 N-S, red transp.
  • as SL 1309 N, but in spray cans, index S = spray can (CFC free propellant)
  • ideal for pilot and low volume production as well as repair purposes

Conformal/permanent coating SL 1400 ECO-FLZ, colourless, fluorescent, humidity curing
  • base: humidity curing polyurethane resins (PUR)
  • application: brushing, spraying, selective coating processes
  • Index ECO = ecological
  • free of aromatic solvents such as benzene, toluene, xylene and C9 aromates
  • fulfils the requirements of the "lead-free regulation" (EU vehicle end-of-life directive 2000/53/EC): free of lead, cadmium, chromium (VI) and mercury compounds
  • complies with the United States?EPA 33/50 program *
  • does not contain any substances listed in the RoHS directive 2002/95/EC**
  • high solids content (approx. 60%)
  • excellent wetting even of angular component leads
  • exhibits the excellent resistances of a 2-pack lacquer system
  • offers excellent climatic protection at high temperatures and atmospheric humidities
  • corresponds to the best flame class V-0 acc. UL 94
 
  * The 33/50 program by the EPA (Environmental Protection Agency) aims for a reduction in the use of certain substances that are hazardous to the environment and health.

** lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyl (PBB) and/or polybrominated diphenylether (PBDE); RoHS directive 2002/95/EC on the Restriction of the use of certain Hazardous Substances in electrical and electronic equipment

  
   
  5. Thick-film lacquers TWIN-CURE  
     
  5.1 General characteristics
  • excellent corrosion protection of assembled pcbs/flat packs
  • suitable for thick-film application, application of layers up to 500 ? in one operation (index DSL = thick-film lacquer)
  • solvent-free 1-pack systems with the resistance of a 2-pack system
  • short processing times in spite of high layers owing to optimally synchronised curing mechanisms: fast UV curing and chemical cross-linking reaction in shadow areas
  • excellent mechanical, chemical and climatic resistance
  • thermal class B = 130 ? [266 ?]
    •
  • on account of its fluorescent adjustment (index FLZ = fluorescent) the coating can be controlled easily and reliably under UV light (black light).
    •
 
  5.2     Product-specific characteristics
 		  
 

Product (series)
 

Special properties
 
Thick-film lacquers TWIN-CURE?/sup> of the series DSL 1600 E-FLZ, colourless transparent

DSL 1600 E-FLZ
DSL 1600 FLZ
  • base: copolymerisate of polyurethane (PUR) and polyacrylate (AY)
  • application: brushing, selective coating processes, dispenser
  • fulfil the requirements of the "lead-free regulation" (EU vehicle end-of-life directive 2000/53/EC): free of lead, cadmium, chromium (VI) and mercury compounds
  • comply with the United States?EPA 33/50 program*
  • do not contain any substances listed in the RoHS directive 2002/95/EC**
  • DSL 1600 E-FLZ (index E = elastic) is also resistant in case of fast and extreme temperature changes (Cold Check Test) in layers up to 500 ?, DSL 1600 FLZ only in layers up to 200 ?
 
  * The 33/50 program by the EPA (Environmental Protection Agency) aims for a reduction in the use of certain substances that are hazardous to the environment and health.

** lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyl (PBB) and/or polybrominated diphenylether (PBDE); RoHS directive 2002/95/EC on the Restriction of the use of certain Hazardous Substances in electrical and electronic equipment

  
  _  
  6. Silicone conformal/permanent and thick-film lacquers       
     
  6.1 General characteristics
  • excellent corrosion protection of assembled pcbs/flat packs
  • highly elastic, thus also suitable for flexible pcbs
  • the thick-film lacquers have a stress-compensating effect during thermal shocks and vibration
  • excellent protection against moisture and other aggressive environmental conditions
  • very good chemical and thermal resistance (up to 200 ? [392 ?])
  • thermal class H = 180 ? [356 ?]
  • good adhesion to all common substrates even without additional adhesive agents (self-priming)
  • excellent dielectric performance: the dielectric constant as well as the dissipation factor tan δ are virtually independent of frequency and temperature
  • fulfil the requirements of the "lead-free regulation (EU vehicle end-of-life directive 2000/53/EC): free of lead, cadmium, chromium (VI) and mercury compounds
    •
  • on account of the fluorescent adjustment (index FLZ = fluorescent) the coating can be controlled easily and reliably under UV light (black light)
  • can be simply removed mechanically for repair purposes.
    •
 
  6.2     Product-specific characteriestics
 		  
 

Product (series)
 

Special properties
Silicone conformal coating SL 1700 FLZ, colourless transparent
Silicone thick-film lacquer DSL 1705 FLZ, colourless transparent 
  • base: polyorganosiloxane
  • application: brushing, dipping, selective coating processes
  • solvent-free
  • for thick-film application up to 3000 ? (index DSL = thick-film lacquer)
  • addition cross-linking, thus suitable for use in an encased environment
  • fast thermal curing (15 min at 110 ? [230 ?])
    •
  • complies with the United States?EPA 33/50 program*
  • does not contain any substances listed in the RoHS directive 2002/95/EC**
  • UL approval as conformal coating: flame class V-1 acc. to UL 94, Approbation No. File E 80315
Silicone thick-film lacquers of the series DSL 1706 FLZ, colourless transparent

DSL 1706 FLZ
DSL 1706 HV-FLZ
DSL 1706 NV-FLZ
  • base: polyorganosiloxane
  • application: brushing, spraying, selective coating processes
  • various viscosity adjustments:
    index HV = highly viscous adjustment
    index NV = low viscous adjustment
  • solvent-free
  • for thick-film application up to 300 ? (index DSL = thick-film lacquer)
  • condensation cross-linking
  • fast cross-linking at room temperature
  • comply with the United States?EPA 33/50 program*
  • do not contain any substances listed in the RoHS directive 2002/95/EC**
  • correspond to the best flame class V-0 acc. to UL 94
 
  * The 33/50 program by the EPA (Environmental Protection Agency) aims for a reduction in the use of certain substances that are hazardous to the environment and health.

** lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyl (PBB) and/or polybrominated diphenylether (PBDE); RoHS directive 2002/95/EC on the Restriction of the use of certain Hazardous Substances in electrical and electronic equipment

  
 

 
  For loads/stress to which a 1-pack conformal/permanent coating is not sufficiently resistant, as for instance in case of aggressive industrial atmosphere, solvent exposure, wetness, or similar, 2-pack casting compounds for the protection of electronics are available.

Please also note group 9 "Insulating and encapsulating varnishes, colourless and coloured transparent" (including 2-pack lacquers) as well as group 10 "Insulating and engine casing varnishes, coloured opaque".

Any questions?

We would be pleased to offer you advice and assistance in solving your problems. Free samples and technical literature are available upon request.

The above information as well as advice given by our Application Technology Department whether in verbal or written form or during product evaluations is provided to the best of our knowledge, but must be regarded as non-binding recommendations, also with respect to possible third-party proprietary rights.

The products are exclusively intended for the applications indicated in the corresponding technical data sheets.

The advisory service does not exempt you from performing your own assessments, in particular of our material safety data sheets and technical information sheets, and of our products as regards their suitability for the applications intended. The application, use and processing of our products and of the products manufactured by you based on the advice given by our Application Technology Department are beyond our control and thus entirely your responsibility. The sale of our products is effected in accordance with our current terms of sale and delivery.

  

  Lackwerke Peters GmbH + Co KG, Hooghe Weg 13, 47906 Kempen, Tel.: +49 (0) 2152-2009-0, Fax.: -70, peters@peters.de