{"id":10504,"date":"2026-07-08T00:00:17","date_gmt":"2026-07-08T00:00:17","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=10504"},"modified":"2026-08-09T06:17:45","modified_gmt":"2026-08-09T06:17:45","slug":"3367-vs-3500-vs-3565","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/nl\/3367-vs-3500-vs-3565\/","title":{"rendered":"3367 vs 3500 vs 3565: Reactive Leveling Guide"},"content":{"rendered":"

3367 vs 3500 vs 3565 is not a comparison of three identical reactive leveling additives.<\/strong> CHLUMIAG\u00ae 3367 has a documented hydroxyl\/isocyanate polyurethane reaction route. CHLUMIAG\u00ae 3500 has documented acrylic functional groups for radiation cure. CHLUMIAG\u00ae 3565 is publicly described as a PU-leather release, feel, wetting and leveling product, but its page does not document a reactive group or network-incorporation mechanism.<\/p>\n

Start with chemistry and end use, then confirm current TDS data. \u201cAdd before curing agent\u201d does not by itself prove that an additive consumes curing agent.<\/p>\n

Reaction-route decision map<\/h2>\n
\n\n\n\n\n\n\n\n\n
Formulation question<\/th>\nPublished evidence<\/th>\nFirst route<\/th>\n<\/tr>\n<\/thead>\n
PU modification needs a hydroxyl\/NCO grafting route<\/td>\n3367 page documents hydroxyl reaction with isocyanate<\/td>\n3367 with stoichiometry review<\/td>\n<\/tr>\n
Radiation cure needs acrylic-functional surface control<\/td>\n3500 page documents reactive acrylic groups and crosslinking<\/td>\n3500 with UV conversion review<\/td>\n<\/tr>\n
Dry-process PU leather needs release\/feel\/wetting<\/td>\n3565 page documents PU compatibility, release and pinhole risk<\/td>\n3565 as a performance trial, not assumed reactive<\/td>\n<\/tr>\n
Mechanism is required for a specification<\/td>\nPublic data is incomplete or contradictory<\/td>\nObtain current individual TDS before selection<\/td>\n<\/tr>\n<\/tbody>\n<\/table>
Original 3367\/3500\/3565 reaction map: separate PU grafting, radiation crosslinking and unproven reactive incorporation.<\/figcaption><\/figure>\n\n\n\n\n\n\n\n
Product<\/th>\nDocumented role<\/th>\nPublished use<\/th>\nMain guardrail<\/th>\n<\/tr>\n<\/thead>\n
CHLUMIAG\u00ae 3367<\/strong><\/a><\/td>\nReactive PU leveling\/modification through hydroxyl and NCO<\/td>\nSolvent 0.05\u20131% total; resin modification 0.5\u20135% resin; waterborne 0.5\u20135% total<\/td>\nCurrent OH value and NCO\/OH balance required; avoid additive mixtures<\/td>\n<\/tr>\n
CHLUMIAG\u00ae 3500<\/strong><\/a><\/td>\nAcrylic-functional radiation-cure leveling<\/td>\n0.05\u20131% total; UV, solvent and water-based; any stage\/later<\/td>\nUV conversion, light\/heat storage and mixing compatibility<\/td>\n<\/tr>\n
CHLUMIAG\u00ae 3565<\/strong><\/a><\/td>\nPU-leather release, feel, wetting and leveling route<\/td>\nWater-dispersible\/oil-soluble; before curing agent<\/td>\nReactive mechanism not published; two dosage ranges conflict; pinhole risk<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

3367 is the documented polyurethane reaction route<\/h2>\n

The 3367 page states that hydroxyl groups can react with isocyanates and that it can be added with the polyol during PU prepolymerization or later. This supports a PU reaction route, but the public page does not provide a current hydroxyl value for stoichiometric calculation.<\/p>\n

Before a 2K or prepolymer trial, obtain the current TDS and include additive hydroxyl demand in the NCO\/OH balance. Measure viscosity, exotherm, pot life, gel time, cure, adhesion, flex, scratch, abrasion, feel and migration. A published dosage is not a substitute for reaction accounting.<\/p>\n

3500 is the documented radiation-cure route<\/h2>\n

The 3500 page identifies reactive acrylic functional groups and crosslinking within a radiation-cured polymer network. Its supported 0.05\u20131% range is easier to screen, but its broad system table does not mean every waterborne or solvent coating uses the same cure mechanism.<\/p>\n

In UV work, record oligomer, monomer, photoinitiator, pigment, oxygen exposure, lamp spectrum, dose, irradiance and film build. Compare surface and through-cure, adhesion, rub, blocking and recoat after identical conditioning.<\/p>\n

3565 should not be called reactive from public data<\/h2>\n

The 3565 page describes polyether-modified polysiloxane and a customized dry-process PU-leather release\/feel route. It says to add the product before curing agent, but does not identify a reactive functional group, equivalent weight or network incorporation.<\/p>\n

The page also shows both 0.05\u20131% and 0.02\u20133% total-formulation guidance. Do not resolve that conflict by guessing. Obtain the current product-specific TDS, confirm the basis, and treat pinhole testing as mandatory.<\/p>\n

Do not transfer \u201creactive\u201d across the family<\/h2>\n

Website category labels can group anti-sticking, release and reactive additives together. They do not prove that every listed product consumes NCO or participates in acrylate polymerization. Product-specific composition, functional group, equivalent value and curing evidence control the claim.<\/p>\n

Build three different trial plans<\/h2>\n
    \n
  1. 3367:<\/strong> blank plus compact dosage ladder, with NCO\/OH correction and pot-life monitoring.<\/li>\n
  2. 3500:<\/strong> fixed UV dose and film build, with conversion-sensitive cure and rub checks.<\/li>\n
  3. 3565:<\/strong> fixed PU slurry, release paper and cure, with release, residue, pinhole, feel and adhesion checks.<\/li>\n
  4. Never mix first.<\/strong> Each public page warns against or urges caution with additive combinations.<\/li>\n
  5. Age specimens.<\/strong> Recheck migration, adhesion, blocking and feel after heat, humidity or storage.<\/li>\n<\/ol>\n

    Use methods within their limits<\/h2>\n

    ASTM D5402<\/a> can compare solvent resistance as chemically changing coatings cure, but solvent resistance alone does not establish full cure. ASTM D3359<\/a> provides a limited tape-adhesion rating and cannot distinguish high adhesion levels. ASTM D4060<\/a> can compare abrasion of coatings on rigid panels when wheel, load, resurfacing and film construction are controlled.<\/p>\n

    For PU leather, add production-specific flex, release force, paper residue, texture replication, hydrolysis and repeated-release cycles. For UV coating, add dose, conversion, oxygen inhibition, yellowing and downstream adhesion.<\/p>\n

    Common comparison errors<\/h2>\n

    Treating addition before curing agent as proof of reaction<\/h3>\n

    Addition sequence is process guidance. A reactive claim needs a functional group and curing mechanism.<\/p>\n

    Ignoring 3367 stoichiometry<\/h3>\n

    If hydroxyl groups consume isocyanate, the current OH value belongs in the formulation balance.<\/p>\n

    Choosing 3565 from a single dosage number<\/h3>\n

    The public page carries two ranges. Confirm the current TDS rather than selecting the convenient one.<\/p>\n

    Request a chemistry-matched comparison<\/h2>\n

    Send the resin and curing chemistry, system type, solids, current additives, reaction ratio, UV equipment where applicable, substrate, application, cure schedule, target feel\/release\/leveling, and pot-life, adhesion, pinhole, rub, abrasion and durability limits. Ask Longchang Chemical for current 3367, 3500 and 3565 TDS guidance<\/strong><\/a>.<\/p>","protected":false},"excerpt":{"rendered":"

    A practical B2B comparison for buyers choosing between CHLUMIAG\u00ae 3367, 3500, and 3565 when the real decision is cross-system compatibility, UV-cured leveling direction, resin-modification flexibility, or pinhole-risk control.<\/p>","protected":false},"author":6,"featured_media":10505,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-10504","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"yoast_head":"\n3367 vs 3500 vs 3565: Reactive Leveling Guide<\/title>\n<meta name=\"description\" content=\"Compare 3367, 3500 and 3565 by documented reaction route, coating system, dosage, addition stage and risk before assigning cure incorporation.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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