快速回答： buyers should not treat CHLUMICRYL® DP-D2645R, CHLUMICRYL® DP-D2791， 和 CHLUMICRYL® DP-D2792 as interchangeable waterborne dispersants. DP-D2645R should move up first when the project needs the broadest supported waterborne route across carbon black, organic pigments, inorganic pigments, and pigment-filler co-dispersion. DP-D2791 belongs earlier when the buyer is screening a titanium-dioxide, inorganic-pigment, filler, or general waterborne color route and wants the page that is explicitly not for carbon black. DP-D2792 should move first when the real job is carbon black or all-organic-pigment dispersion and the team wants a tighter waterborne route for black and color concentrate work.
That is the commercially useful split. This page is not another broad dispersants overview. It is a buyer-selection page for teams that already know the system is waterborne and now need to decide which CHLUMICRYL® dispersant deserves the first sample round.
Why this page deserves to exist beside the broader dispersant branch
Longchang already has live CHLUMICRYL® pages for the broader dispersants guide, plus narrower solvent-side and defect-driven pages such as floating color and flowering control, organic bentonite slurry selection， 和 matting-powder dispersant selection. Those pages answer adjacent questions first.
This page answers a narrower waterborne buyer question that still was not covered cleanly: when the dispersant screen is specifically inside waterborne pigments, which route should start first if the package is broad mixed-pigment, TiO2-and-filler-led, or carbon-black-and-organic-led?
That distinction matters because waterborne formulation teams usually do not fail for one generic reason. The real first decision is often whether the package is dominated by:
- mixed pigment breadth,
- titanium dioxide, inorganic pigments, and fillers， 或者
- carbon black and high-color organic pigment demand.
Once that first decision is clear, the dispersant shortlist gets much cleaner.
目前公司支持的事实已经表明了这一点。
- DP-D2645R is the broadest route on this page. Longchang supports it as a polymer dispersant for water-based systems that is suitable for grinding carbon black, organic pigments, and inorganic pigments, and also for pigment and filler mixed dispersing. The current product page also supports excellent gloss, color intensity, transparency, hiding power, no floating color or flooding， 和 good storage stability. The visible dosage guidance is 2% to 10% for inorganic pigments, 10% to 50% for organic pigments, and 30% to 100% for carbon black.
- DP-D2791 is the clearer TiO2, inorganic pigment, filler, and general organic-pigment route龙昌支持它作为 water-borne pigment dispersant suitable for grinding organic pigments, inorganic pigments, titanium dioxide, and fillers, while also stating that it is not suitable for carbon black. The current page supports excellent gloss, color intensity, transparency, covering power， 和 good storage stability. The visible dosage guidance is 2% to 10% for inorganic pigments and 10% to 50% for organic pigments.
- DP-D2792 is the cleaner carbon-black and all-organic-pigment route龙昌支持它作为 water-borne pigment dispersant suitable for grinding carbon black and all organic pigments. The current product page also supports excellent gloss, color intensity, transparency, covering power, no floating color or flooding， 和 good storage stability. The visible dosage guidance is 10% to 50% for organic pigments and 30% to 100% for carbon black.
That is enough supported separation to justify a dedicated waterborne comparison page without inventing unsupported end-use claims. General industry framing is used here only conservatively: waterborne dispersant selection is often narrowed first by whether the pigment package is carbon-black-led, inorganic-and-filler-led, or broader mixed-pigment work. The actual product claims above stay tied to Longchang’s own product pages.
快速对比表：哪条路线应该优先显示？
| 观察到的买家优先 | 最佳首选路线 | 为什么它应该排在第一位 | 主要观察点 |
|---|---|---|---|
| One waterborne dispersant route needs to cover carbon black, organic pigments, inorganic pigments, and pigment-filler mixed dispersion | DP-D2645R | Longchang explicitly supports the broadest pigment scope on this page, including carbon black and pigment-filler co-dispersion | Use it when broad scope matters most, not when the buyer already knows the package is TiO2-and-filler-led or carbon-black-only led |
| The screen is mainly about titanium dioxide, inorganic pigments, fillers, and general waterborne color work without carbon black | DP-D2791 | Longchang directly supports titanium dioxide, fillers, inorganic pigments, and organic pigments, while clearly stating it is not suitable for carbon black | Do not force it into a carbon-black route just because the rest of the package looks waterborne |
| The package is dominated by carbon black or all-organic-pigment dispersion and needs a tighter black-and-color route | DP-D2792 | Longchang directly supports carbon black and all organic pigments, with color-strength, transparency, and storage-stability language | Not the cleaner first route when the job is really TiO2, fillers, or a broader inorganic package |
When DP-D2645R is the better first move
DP-D2645R should move to the front when the buyer needs the broadest supported waterborne dispersant window on this page. This is the route to screen first when the formulation team does not want to split the initial work immediately into separate carbon-black, inorganic, and filler routes.
Longchang’s current page gives DP-D2645R the widest supported pigment scope here:
- carbon black
- organic pigments
- inorganic pigments
- pigment and filler mixed dispersing
That matters because many waterborne industrial and architectural formulations are not simple single-pigment systems. They may combine extenders, fillers, white pigments, tinting pigments, and sometimes black components in one practical screen. If the team wants one first route that can stay open across that broader burden, DP-D2645R is usually the cleaner first benchmark.
The current company-supported page also strengthens that position with a broader performance package: excellent gloss, color intensity, transparency, hiding power, no floating color or flooding， 和 good storage stability.
DP-D2645R deserves earlier review when:
- the waterborne program includes mixed pigment families,
- the screen also has to consider filler co-dispersion,
- the buyer wants to keep carbon black still in scope， 或者
- the first lab round needs a broader commercial benchmark before narrowing into a more specialized route.
The practical tradeoff is also clear. If the team already knows the project is a non-carbon-black TiO2 and filler route or a carbon-black-and-organic route, a tighter specialist product can sometimes teach faster than the broadest option.
When DP-D2791 is the better first move
DP-D2791 belongs earlier when the buyer wants a waterborne pigment route centered on titanium dioxide, inorganic pigments, fillers, and general organic pigments, but does not need carbon black in the same first-screen path.
This is the cleanest separation point on the current product page. Longchang explicitly supports DP-D2791 for organic pigments, inorganic pigments, titanium dioxide, and fillers, and also states that it is not suitable for carbon black. That kind of direct exclusion is commercially useful because it stops the first sample round from becoming muddy.
DP-D2791 should move up first when:
- the project is mainly about TiO2, filler, or inorganic-pigment stabilization,
- the buyer still wants an organic-pigment-capable waterborne route,
- carbon black is not part of the first real package， 或者
- the lab wants a route that stays cleaner for white, extender, and general color systems instead of forcing one universal answer.
The company-supported benefits also stay commercially relevant: excellent gloss, color intensity, transparency, covering power， 和 good storage stability.
The limitation should remain visible. If the project really is moving toward carbon black, this is not the page’s best first route. Longchang says that clearly, so the buyer should use that boundary instead of treating DP-D2791 as a catch-all waterborne dispersant.
When DP-D2792 is the better first move
DP-D2792 becomes more attractive when the formulation is already behaving like a carbon-black or all-organic-pigment job rather than a broad mixed-pigment or TiO2-and-filler job. This is the tighter specialist route on the page when black and strong color work drive the first decision.
Longchang supports DP-D2792 for grinding carbon black and all organic pigments. The same page also supports excellent gloss, color intensity, transparency, covering power, no floating color or flooding， 和 good storage stability.
That pushes DP-D2792 earlier when:
- the buyer is screening a carbon-black-heavy waterborne system,
- the package is dominated by all-organic-pigment color work,
- the team wants a route that stays tighter around black and color concentrate logic， 或者
- the first round should avoid carrying unnecessary TiO2-and-filler assumptions.
Its visible dosage logic also fits that specialization, with 10% to 50% for organic pigments and 30% to 100% for carbon black. That is a clearer starting route when carbon-black demand is real, not hypothetical.
The tradeoff is straightforward. If the formulation burden is really broader than carbon black and organic pigments, or if the screen is more about TiO2 and fillers, another route on this page usually belongs first.
买家在索取样品前应该如何选择
1. Start with the real pigment package, not the broadest product name
If the package includes carbon black, organic pigments, inorganic pigments, and fillers together, DP-D2645R usually deserves the first look. If the project is mainly TiO2, fillers, and inorganic pigments without carbon black, DP-D2791 becomes cleaner. If the work is carbon-black or organic-pigment-led, DP-D2792 usually moves up.
2. Use the carbon-black boundary honestly
DP-D2791 is not suitable for carbon black on the current Longchang page. That is not a minor note. It is a buyer-shortlist boundary and should be treated that way from the start.
3. Keep storage stability in the first screen
All three pages carry storage-stability language. That means buyers should not judge the first round only by fresh grind appearance. If the formulation must sit in inventory or travel through real supply conditions, storage behavior belongs in the same early decision.
4. Do not confuse broad scope with best fit
DP-D2645R has the broadest supported scope on this page, but that does not automatically make it the best first route for every waterborne project. A tighter specialist route often teaches faster when the pigment burden is already obvious.
5. Keep the first trial round short
对许多买家来说，最干净的第一轮是…… DP-D2645R broad-scope route， 一 DP-D2791 TiO2-and-filler route，以及一个 DP-D2792 carbon-black-and-organic route. That usually produces a faster commercial answer than screening several nearby waterborne dispersants without a clear lane split.
本页推荐的龙昌路线
- 集群概览： CHLUMICRYL® 涂层和油墨添加剂
- Broader dispersants guide: 如何选择颜料涂料和油墨的分散剂
- Related solvent-side defect page: 如何减少溶剂型涂料中的浮色和泛色现象
- 相关对比页面： DP-D241R 与 DP-D2641R 与 DP-D265R
- 相关应用页面： 如何选择溶剂型涂料中消光粉的分散剂
- DP-D2645R product page: CHLUMICRYL® DP-D2645R
- DP-D2791 product page: CHLUMICRYL® DP-D2791
- DP-D2792 product page: CHLUMICRYL® DP-D2792
常见问题
Which dispersant should I screen first if my waterborne system includes carbon black, organic pigments, inorganic pigments, and fillers?
通常 DP-D2645R, because Longchang explicitly supports it across carbon black, organic pigments, inorganic pigments, and pigment-filler mixed dispersing.
When is DP-D2791 a better first route than DP-D2645R?
DP-D2791 is a better first route when the project is mainly about titanium dioxide, inorganic pigments, fillers, and general waterborne color work, and carbon black is not part of the first real package.
Why would a buyer choose DP-D2792 before the other two?
Because some waterborne systems are clearly carbon-black-led or all-organic-pigment-led. In that case, DP-D2792 gives a tighter first screen than a broader mixed-pigment route.
这三种分散剂可以互换使用吗？
No. Their current Longchang-supported pigment scope is different enough that buyers should not treat them as drop-in substitutes. One is broad mixed-pigment and filler capable, one excludes carbon black but covers TiO2 and fillers well, and one is tighter around carbon black plus all organic pigments.
What is the biggest mistake in the first waterborne dispersant shortlist?
The biggest mistake is ignoring the real pigment burden. Teams lose time when they test a TiO2-and-filler route in a carbon-black-led project, or when they force a carbon-black route into a broader inorganic-and-filler package.
Need a tighter waterborne dispersant shortlist?
If your waterborne coating or ink project is being slowed by uncertainty around carbon black, titanium dioxide, fillers, or broader mixed-pigment dispersion, define the real pigment package first. That usually makes the next CHLUMICRYL® dispersant decision much faster.