{"id":10525,"date":"2026-07-10T00:00:55","date_gmt":"2026-07-10T00:00:55","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=10525"},"modified":"2026-08-09T13:20:06","modified_gmt":"2026-08-09T13:20:06","slug":"d545-vs-d547-vs-d548","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/nl\/d545-vs-d547-vs-d548\/","title":{"rendered":"D545 vs D547 vs D548: Waterborne Wetting Guide"},"content":{"rendered":"

D545 vs D547 vs D548<\/strong> is a comparison of three silicone wetting routes, not a universal winner table. Their published system scope, dosage and supplier scores differ. Choose the real coating defect and vehicle first, then compare candidates at controlled active levels while watching foam, craters, adhesion, recoat and storage.<\/p>\n

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D545<\/strong>
Waterborne coating route with narrow published scope.<\/div>\n
D547<\/strong>
Broad-system route with stronger qualitative foam relevance.<\/div>\n
D548<\/strong>
Broad water\/solvent wetting route and wider published dose.<\/div><\/div>
Original D545\/D547\/D548 map: shortlist by system and measured failure, then prove performance in one coating matrix.<\/figcaption><\/figure>\n

Read active substance and content correctly<\/h2>\n

De D545<\/a> page states \u201cactive substance 100%\u201d and separately reports \u201ccontent \u226592%\u201d after a 105\u00b0C, three-hour test. Its note attributes the difference to synthesis-related excess low-molecular-weight polyethers counted as volatile. That wording does not justify calling the remainder solvent. Use the supplier\u2019s exact terms and request the current TDS\/COA when normalizing trials.<\/p>\n

Compare published system and dose evidence<\/h2>\n\n\n\n\n\n\n\n
Rang<\/th>\nPublished system scope<\/th>\nRecommended addition<\/th>\nRelevant handling note<\/th>\n<\/tr>\n<\/thead>\n
AGESIN\u00ae WD-D545<\/td>\nWaterborne wood, industrial and plastic paint<\/td>\n0.1\u20130.5% of total formulation<\/td>\nMay freeze at low temperature; page says transparency and flow restore after heating<\/td>\n<\/tr>\n
AGESIN\u00ae WD-D547<\/a><\/td>\nWaterborne, solvent, solvent-free and UV<\/td>\n0.1\u20130.5% of total formulation<\/td>\nBroad-system wetting\/spreading with qualitative leveling, recoat and defoaming descriptions<\/td>\n<\/tr>\n
AGESIN\u00ae WD-D548<\/a><\/td>\nWaterborne and solvent systems<\/td>\n0.1\u20131.0% of total formulation<\/td>\nMay freeze at low temperature; page says heating or solvent dilution restores use<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Treat supplier scores as qualitative<\/h2>\n

The pages display 0\u20135 recommendation scores rather than a published standardized head-to-head laboratory study. D545 shows transparency 4, defoaming 0, dynamic surface tension 4, static surface tension 3 and slip 0. D547 shows 1, 3, 3, 4 and 0. D548 shows 4, 0, 5, 4 and 0. These help form hypotheses; they are not statistical proof that one grade will win in a customer formulation.<\/p>\n

Use the score pattern to frame experiments<\/h2>\n\n\n\n\n\n\n\n\n
Question<\/th>\nPossible first candidate<\/th>\nWhy it is only a hypothesis<\/th>\nRequired counter-check<\/th>\n<\/tr>\n<\/thead>\n
Waterborne coating needs transparency<\/td>\nD545 or D548<\/td>\nBoth show supplier transparency score 4<\/td>\nHaze, gloss, compatibility and storage in the actual binder<\/td>\n<\/tr>\n
Dynamic wetting at application speed<\/td>\nD548<\/td>\nSupplier dynamic score is 5<\/td>\nProduction-speed wetting, craters and air<\/td>\n<\/tr>\n
Wetting plus qualitative foam relevance<\/td>\nD547<\/td>\nOnly D547 shows defoaming score 3<\/td>\nFoam decay, density, crater and gloss against a dedicated control<\/td>\n<\/tr>\n
Narrow waterborne paint scope<\/td>\nD545<\/td>\nIts listed applications fit this boundary<\/td>\nSubstrate, binder and recoat validation<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Keep the D545 water datum in context<\/h2>\n

The D545 page reports a surface tension of 20.5 mN\/m at 0.2% in water. This is a water test, not proof of coating wetting, adhesion, foam behavior or long-term stability. Pigments, resin, neutralizer, co-solvent and other surfactants can change the result. Do not rank final coatings from that single value.<\/p>\n

Screen by system before dosage<\/h2>\n

D545 has the narrowest published application scope and should not be projected into solvent-free or UV systems without new supplier evidence. D547 covers the broadest listed system set. D548 covers waterborne and solvent coatings and has the widest recommended range. A broad scope does not guarantee compatibility; it only makes a grade eligible for the next controlled test.<\/p>\n

Normalize the trial basis<\/h2>\n

All three pages state 100% active substance, while D545 also carries the separate content-test wording explained above. Run initial comparisons at the same low as-supplied level where published ranges overlap, then optimize each candidate independently. Record addition stage, mixing shear, temperature and aging. Never compare one at 0.1% and another at 1.0% and call the result a product ranking.<\/p>\n

Prepare repeatable coating films<\/h2>\n

ASTM D823<\/a> describes practices for producing films of uniform thickness on test panels. Use identical panels, application settings and film build. Include production-relevant spray, roll or brush trials after drawdown screening because dynamic wetting and air entrainment depend on application energy.<\/p>\n

Measure foam without over-interpreting it<\/h2>\n

ASTM D1173<\/a> covers foam tests for surface-active agents. A controlled foam test can compare height and decay, but it may not correlate directly with grinding, pumping or spraying. Pair it with wet-density measurements and cured-film inspection under the real process. D547\u2019s qualitative defoaming score is not a replacement for that evidence.<\/p>\n

Check adhesion and recoat<\/h2>\n

ASTM D3359<\/a> provides tape-test methods for coating adhesion. Compare the unchanged control and every additive level after the same cure, then repeat after the intended recoat. Document failure location and substrate. Better wetting can still reduce intercoat adhesion if surface segregation becomes excessive.<\/p>\n

Handle freeze recovery as a release gate<\/h2>\n

D545 and D548 pages both mention low-temperature freezing and recovery. Do not assume a warmed container is automatically equivalent to fresh material. Define a controlled recovery temperature and mixing procedure, then inspect clarity, flow, separation and coating performance. Request current supplier storage instructions before using freeze\u2013thaw exposure as a routine acceptance method.<\/p>\n

Decision rules<\/h2>\n