Risposta rapida: PU leather and polyurethane coating buyers usually lose time when they compare every silicone additive as if it solves the same first problem. CHLUMIFE® 3370 should move up first when the project is a two-component polyurethane or hydroxyl-topcoat route and the team mainly wants leveling, gloss, and smoothness while staying inside a crosslinking system. CHLUMIAG® 3467 belongs earlier when the buyer needs a broader polyurethane modification route across PU coatings, PU leather, and composite coatings, especially when the job also includes anti-sticking, peeling, smoother hand feel, scratch or abrasion support, low-temperature flexibility, and breathability. CHLUMIAG® 3565 should move up first when the real issue is PU leather slurry anti-sticking and peeling release with added needs around wetting, slip, leveling, and compatibility.
That is the commercially useful split. This page is not another generic polyurethane article. It is a buyer-selection page for teams deciding which surface-additive route deserves the first sample round in PU leather and polyurethane coating work.
Why this page deserves to exist beside the broader CHLUMICRYL® branch
Longchange ha già pagine live per CHLUMICRYL® Additivi per vernici e inchiostri, additivi livellanti, additivi per la scorrevolezza, additivi antibloccanti, and the already-live PU-finish comparison page 5005 vs 5005-60 vs 3388. Those pages help buyers choose broader function lanes or hand-feel versus stain-resistance logic.
PU leather and polyurethane coating teams often hit a different second-stage question after that. They already know the job sits in the polyurethane surface-control lane. The next decision is narrower: should the first screen start with a 2K PU topcoat leveling route, a broader PU leather and composite-coating modification route, or a slurry anti-sticking and peeling-release route?
That narrower decision is worth its own page because PU systems are rarely judged by one KPI alone. Buyers are often balancing several requirements at once:
- leveling, gloss, and film smoothness,
- surface hand feel and anti-sticking behavior,
- peeling or release behavior in leather-style processing,
- scratch and abrasion support after curee
- low-temperature flexibility, breathability, or composite-coating process fit.
That is why a polyurethane-specific selection page is more useful than sending every buyer back to a broad function article.
What the current company-supported facts already separate
The current Longchang product pages already create a meaningful split:
- CHLUMIFE® 3370 is positioned as an organosilicon feel agent and silicone surfactant per two-component polyurethane crosslinking systems e various hydroxyl topcoats. Longchang says it can improve leveling, gloss, and smoothness. The public page supports use across UV, solvent, water-based, and baking-finish systems, con un dosaggio raccomandato di Da 0,1% a 1,0%.
- CHLUMIAG® 3467 is positioned as a silicone leveling agent and a modified silicone additive used for the comprehensive modification of polyurethane coatings, PU leather, and composite coatings. Longchang supports it with leveling, anti-cratering, substrate wetting, anti-sticking and peeling, smooth and pleasant hand feel, scratch resistance, abrasion resistance, low-temperature flexibility, breathability, and moisture permeability. The public page supports Sistemi a base di raggi UV, solventi e acqua, con un dosaggio raccomandato di Da 0,1% a 1,0%.
- CHLUMIAG® 3565 is positioned as an organosilicon surfactant utilizzato come customized anti-sticking and peeling release agent for PU leather slurry. Longchang also supports it with anti-sticking, peeling, scratch resistance, abrasion resistance, wetting, slip feel, leveling, and compatibility, while stating that it is compatible with various silicone-modified acrylic resins and polyurethane resins. The public page supports Sistemi a base di raggi UV, solventi e acqua, gives a recommended dosage of 0.05% to 1.0%, says it should be added before the curing agent and stirred thoroughly, and explicitly warns that it può causare fori di spillo.
That difference is enough to justify a dedicated PU leather and polyurethane selection page.
Tabella comparativa rapida: quale percorso merita di essere visualizzato per primo?
| priorità dell'acquirente osservata | Il miglior primo percorso | Perché appartiene al primo posto | Punto di osservazione principale |
|---|---|---|---|
| Two-component polyurethane or hydroxyl-topcoat project mainly needs better leveling, gloss, and surface smoothness | CHLUMIFE® 3370 | Longchang directly positions it for two-component polyurethane crosslinking systems and hydroxyl topcoats with leveling, gloss, and smoothness support | Best used when the real first job is topcoat appearance balance rather than anti-sticking or peeling-release correction |
| Broader polyurethane coating, PU leather, or composite-coating project needs multi-property surface modification | CHLUMIAG® 3467 | Longchang supports a wider bundle around anti-cratering, wetting, anti-sticking, peeling, smooth hand feel, scratch resistance, abrasion resistance, low-temperature flexibility, and breathability | Because the scope is broad, the shortlist still needs a clear first KPI instead of assuming one additive will solve every polyurethane issue at once |
| PU leather slurry needs anti-sticking, peeling release, wetting, and compatibility support | CHLUMIAG® 3565 | Longchang explicitly frames it as a customized anti-sticking and peeling release agent for PU leather slurry | Add before the curing agent and watch the stated pinhole risk during qualification |
When CHLUMIFE® 3370 is the better first move
3370 should move to the front when the buyer already knows the project is centered on a two-component polyurethane crosslinking system o un hydroxyl-topcoat route and wants one additive whose public positioning already matches that process window.
That matters because many polyurethane buyers are not starting with a release or anti-sticking complaint. They are starting with a topcoat that still needs a cleaner balance of leveling, gloss, and smoothness. Longchang’s public page for 3370 supports exactly that positioning, without forcing the buyer into a broader leather-slurry or composite-modification story too early.
3370 deserves earlier review when:
- the project is clearly a 2K polyurethane crosslinking job,
- the team wants a route already linked to hydroxyl topcoats,
- gloss and smoothness matter as much as ordinary leveling, or
- the buyer wants a cleaner first screen for appearance balance before moving into anti-sticking or scratch-led troubleshooting.
The practical limit is page focus. 3370 is strongest when the first problem is topcoat balance and appearance control. If the real bottleneck is leather-slurry release, anti-sticking after contact, or broader multi-property PU modification, the other two routes usually deserve earlier attention.
When CHLUMIAG® 3467 is the better first move
3467 belongs earlier when the buyer needs a broader polyurethane modification route rather than a narrower 2K-topcoat appearance answer. This is the strongest separation on the current Longchang page. The product is framed for the comprehensive modification of polyurethane coatings, PU leather, and composite coatings, not only for one topcoat niche.
Longchang also supports an unusually wide set of buyer-relevant effects on the same page: leveling, anti-cratering, substrate wetting, anti-sticking and peeling, smooth and pleasant hand feel, scratch resistance, abrasion resistance, low-temperature flexibility, breathability, and moisture permeability. That makes 3467 the cleaner first route when the project is not only about how the topcoat looks, but about how the polyurethane surface behaves in use and processing.
3467 deserves earlier review when:
- the buyer wants one route that covers PU coatings, PU leather, and composite coatings,
- antiaderente e sbucciante matter together with surface feel,
- the line still needs scratch or abrasion support after cure, or
- low-temperature flexibility, breathability, or moisture permeability are part of the downstream requirement set.
The caution is not about one explicit page warning as much as scope discipline. Because 3467 can enter several polyurethane conversations at once, buyers should still identify the dominant first-screen job instead of asking one additive to replace structured formulation work.
When CHLUMIAG® 3565 is the better first move
3565 becomes more relevant when the real issue is PU leather slurry anti-sticking and peeling release. This is its clearest commercial role. Longchang does not frame 3565 mainly as a general 2K topcoat additive. It frames it as a customized anti-sticking and peeling release agent for PU leather slurry, then adds support around wetting, slip feel, leveling, and compatibility.
That makes 3565 the stronger first route when:
- the process is already inside a PU leather slurry window,
- the buyer needs a more direct anti-sticking and peeling-release answer,
- compatibility with silicone-modified acrylic resins or polyurethane resins matters early, or
- the team can manage a stricter add-before-curing-agent rule during plant or lab trials.
The watchpoint is clear and should stay visible. Longchang explicitly warns that 3565 può causare fori di spillo. So this is not the lazy default. It is the route to move up when slurry release and anti-sticking logic matter enough to justify tighter defect screening.
Come gli acquirenti dovrebbero scegliere prima di richiedere i campioni
1. Start with whether the first job is topcoat appearance, broader PU modification, or slurry release
If the first problem is 2K PU or hydroxyl-topcoat leveling with gloss and smoothness, 3370 deserves earlier attention. If the line needs a broader polyurethane surface-performance route, 3467 usually moves up. If the issue is PU leather slurry anti-sticking and peeling release, 3565 belongs first.
2. Keep the process window visible
3370 is the clearest route for 2K polyurethane crosslinking and hydroxyl topcoats. 3565 is the clearest route for PU leather slurry handling. 3467 sits between them as the broader polyurethane-modification route across coatings, leather, and composite work.
3. Separate broad modification from a direct release complaint
3467 can cover anti-sticking and peeling too, but 3565 becomes more relevant when the complaint is specifically slurry release and anti-sticking in PU leather processing. Those are related but not identical selection jobs.
4. Do not ignore handling rules and defect watchpoints
3565 requires add-before-curing-agent discipline and carries a pinhole warning. That should be part of the buying decision, not a late-stage footnote.
5. Keep the first lab round short
For many polyurethane buyers, the cleanest first round is one 3370-led 2K topcoat route, uno 3467-led broader PU modification routee uno 3565-led slurry anti-sticking and release route. That usually teaches more than screening too many nearby silicone additives at once.
Percorso consigliato per Longchange da questa pagina
- 2K PU and hydroxyl-topcoat route: CHLUMIFE® 3370
- Broader PU coating and composite-coating route: CHLUMIAG® 3467
- PU leather slurry anti-sticking route: CHLUMIAG® 3565
- Panoramica del cluster: CHLUMICRYL® Additivi per vernici e inchiostri
- Pagina relativa alla funzione: Come scegliere gli additivi livellanti per rivestimenti e inchiostri
- Pagina relativa alla funzione: Come scegliere gli additivi antibloccanti per rivestimenti e inchiostri
- Related polyurethane-finish comparison: 5005 vs 5005-60 vs 3388 for PU Leather Hand Feel and Stain Resistance
FAQ
Which additive should I screen first for two-component polyurethane topcoats?
If the project is clearly a two-component polyurethane crosslinking or hydroxyl-topcoat job and the first need is leveling, gloss, and smoothness, 3370 deserves earlier review because Longchang directly positions it for that route.
When is 3467 a better first route than 3370?
3467 is a better first route when the buyer needs a broader polyurethane-modification package across PU coatings, PU leather, or composite coatings, especially when anti-sticking, peeling, hand feel, scratch resistance, flexibility, or breathability also matter.
When should 3565 move ahead of 3467?
3565 should move ahead when the real problem is PU leather slurry anti-sticking and peeling release, and the team can manage the add-before-curing-agent rule plus the stated pinhole-risk watchpoint.
Are these three products interchangeable?
No. Their public company-supported positioning is different enough that buyers should not treat them as drop-in substitutes. One leads with 2K PU topcoat leveling, one with broader polyurethane-surface modification, and one with PU leather slurry anti-sticking and release logic.
Need a tighter polyurethane shortlist?
If your polyurethane or PU leather project is stuck between better topcoat appearance, broader surface performance, and cleaner slurry anti-sticking or peeling release, start by deciding whether the real first job is 2K topcoat leveling, broader PU modification, O slurry release and anti-sticking. That usually shows much faster whether 3370, 3467, or 3565 deserves the first sample round.