Fengfan CAS 68555-36-2 Polyquaternium-2 Diaminoarea polymer WT

Product Overview

A cationic polymer built for deposit control

This grade is Polyquaternium-2, a diamino urea polymer supplied as a yellowish to yellow liquid at a concentration of at least 65%. Its structure is a polyureylene ammonium salt: a long chain carrying a permanent positive charge. That charge is the reason it works. It migrates toward the cathode, adsorbs where current is concentrated, and holds deposition back in exactly those places.

The job it does

In an alkaline zinc bath this polymer is the leveling agent, dosed at 2.0–5.0 g/L. A brightener decides how shiny the deposit looks. A leveling agent decides how evenly it is spread. Most plants add it because the thickness difference between the edges and the recesses of the same part is too wide, and because that difference comes back later as grinding, sorting or rejects.

Where it sits in the range

It belongs to the zinc group, alongside the acid zinc plating chemicals we supply for potassium chloride lines and the alkaline brighteners and carriers. A plant running more than one zinc plating process can take the whole set from one supplier and keep one document trail.

Beyond the metal plating shop

Outside electroplating the same polymer appears in hair and skin conditioners and in cleaning compositions, where its cationic surface active agent behaviour does a completely different job. Those uses carry their own grade requirements and are covered further down the product.

Specifications

Leveling Performance in the Bath

• Thickness control where current concentrates — On a rack, the outer edges of a panel draw far more current than its centre; in a barrel, the parts on the outside of the load do the same. The polymer adsorbs on those areas first and slows deposition there, so the finished thickness across the part narrows.
• Coverage in recesses and blind holes — Because the effect comes from adsorption rather than from brightening chemistry, low-current areas inside a bore or behind a rib still build a continuous layer instead of a thin, patchy one.
• A usable working window — The recommended charge is 2.0–5.0 g/L. Move within that band rather than past it: the low end is the normal starting point for a fresh bath, the high end is for loads whose recesses keep reading thin on test panels.
• Reasonably flat across the current density range — The size of the molecule keeps the leveling effect steady from low to high current density, which is what lets one addition serve a mixed barrel of stampings, fasteners and machined fittings.
• No change to the metal plating process itself — No extra tank, no change of anodes or rectifier settings, no new ventilation requirement. The bath stays as it is and one addition rate changes.
• Stable in alkaline chemistry — At a product pH of 6.0–8.5 and a density of 1.12–1.18 the polymer stays in solution in a caustic zinc bath and needs no heating or separate make-up step.
• Readable on a test panel — A Hull cell panel run at the normal operating current shows quickly whether the bright-to-dull boundary has moved, which is the simplest way to tell whether the leveling component is under- or over-dosed.
• Same chemistry family for alloy baths — Alkaline zinc nickel plating draws on the same class of polymeric leveling agents. If you intend to run this product in an alloy bath, agree the addition rate with our technical contact first, because alloy baths respond differently to the same polymer.

Dosing and Bath Control

1. Confirm what you are running: alkaline zinc, rack or barrel, and the working volume of the metal plating bath in litres.
2. Set the charge at 2.0–5.0 g/L. Start in the lower half for a new bath and reserve the upper half for baths where low-current areas keep reading thin.
3. Pre-dilute the product with water and add it slowly into an agitated bath, away from the work, rather than pouring it neat over the load.
4. Plate a test panel at your normal current and read the bright-to-dull boundary before committing a production load — this is the step that tells you whether the plating process has settled after the change. A Hull cell panel is the standard quick check.
5. Top up on a schedule driven by analysis and drag-out, and log every addition with the batch number printed on the drum.
6. Re-measure pH and density after the first addition, so the next dose is based on your own readings rather than a generic starting figure.
7. If the same line also runs zinc nickel plating, fix the addition rate with our technical contact first; alloy baths need their own balance.

Product Advantages

• A concentrated grade, not a diluted one — At ≥65% active content the drum you store and freight is mostly polymer rather than water, so a given bath volume needs less shelf space and fewer drums moved per shift.
• Liquid and water-miscible — No dissolving step, no dust and no waiting for a powder to wet out; the product goes into the bath as it arrives.
• A specification written as numbers — Form, concentration, pH and density are all stated, so an incoming check is a measurement against a figure rather than a judgement about colour.
• Predictable enough to plan a metal plating process around — The polymer is defined by its charge and chain length rather than by a visual brightening effect, so the leveling response stays consistent enough for a line that has set a thickness tolerance.
• One product identity across two industries — The same Polyquaternium-2 serves metal plating baths and personal-care formulations, so a formulator working in both areas works from one chemical identity and one document set.
• Low addition rate for the effect — A working band of 2.0–5.0 g/L leaves room to tune up or down without reformulating the rest of the bath.

Conditioning and Cleaning Uses

Cationic conditioning

In hair and skin conditioners, Polyquaternium-2 supplies the positive charge that lets a formula deposit on keratin and stay there through rinsing. Formulators reach for it when they want a light conditioning film, easier wet combing and a finished feel that does not read as heavy. It also brings formulation stability and a lower irritation profile than many conventional quaternary conditioning agents, which is why it turns up in rinse-off as well as leave-on products.

Cleaning compositions

In cleaning formulations the polymer works as a surface active agent modifier: it changes how the system wets a surface and how it rinses away, and it helps hold a formula together when surfactants of different character share the same bottle. Cleaners built around it tend to leave less residue behind after the rinse.

A different grade for a different job

These are formulation applications, not steps in a metal plating process, and they are supplied against their own requirement. If the polymer is going into a personal-care or household formula instead of a zinc bath, tell your sales contact what the finished product is, so the right grade and the right paperwork are quoted.

Additive Pairing and Range Fit

• Brighteners for the same bath — SZ-30B for sulfate zinc, ZN 50 for bright alkaline rack and barrel work, and ZN-500 for cyanide-free alkaline zinc. Brightener and leveling agent are dosed independently, so you can correct thickness distribution without changing the look of the deposit.
• Chloride zinc lines — This polymer is not the leveling agent for a potassium chloride bath. For those lines our acid zinc plating chemicals cover the carrier and brightener side, and an alkaline leveling agent will not give you the distribution you are after there.
• Acid copper, when the line runs it too — FI-970 bright acid copper process, for shops that plate copper under nickel or build up thickness before finishing.
• Anodizing sealing — Phoenix Seal 149-L, the middle-temperature sealing agent for aluminium anodizing, and Phoenix Seal 149-T, its medium-temperature counterpart.
• Tin colouring — Phoenix EB 204A-204B divalent tin salt electrolytic colouring additive, for shops that colour anodised aluminium or deposit tin.
• Nickel bath maintenance — Nickel Purify P3, used to clean up a nickel bath that has picked up contamination.
• Chrome mist control — FF-116, an environmentally friendly chrome mist inhibitor for the chrome stage.
• Protection for non-metal surfaces — FF-4219 nano-protective for wood, stone and concrete, where a plating process is not the answer at all.

Storage, Safety and Documentation

Keep the drum closed between additions and store it in a cool, dry place, out of direct sun. Decant with clean equipment: a ladle that has been in the zinc bath will carry contamination back into the drum and shorten the life of what is left in it. As with any concentrated polymer, wear gloves and eye protection when handling it, and keep the working area ventilated as you would for the rest of the line.

A Safety Data Sheet covering handling, storage and transport classification goes with the product. Ask your sales contact for the current version for your destination before the shipment is arranged, so the transport paperwork matches what is actually on the pallet.

Where a customer needs a REACH or RoHS statement, or a composition disclosure for a specific market, we issue it against the actual batch and the market it is going to. That way the document describes the drum in front of you rather than a general claim about the product family. If your compliance team has a template they need filled in, send it with the enquiry and we will work from it.

If the material is being held through a cold season or a long shutdown, keep the drum sealed and check the appearance before use. A product that has separated in storage should be brought back to a uniform liquid before it is dosed.

Ordering and Delivery

1. Tell your sales contact which bath you are running and the volume you treat, so the quantity and the packing match the way you dose.
2. Minimum order quantity varies by chemical and is confirmed with our sales team for each order.
3. Packing across the range is 10 kg/box; 25 kg or 50 kg/bag; 20 kg/25 kg/30 kg/200 kg/drum; and 1000 kg/IBC drum. This grade is normally supplied in 25 kg drums.
4. Payment is 100% T/T in advance.
5. Lead time is 2 weeks.
6. Shipping is arranged per the terms agreed in the current contract.
7. After delivery an inspection certificate is issued stating the batch number and the warranty period for that lot.
8. Ask your sales contact about sample availability before the first order goes in.

Technical Support & Model Matching

Choosing the right match is where most sourcing decisions stall. As a trading supplier, we keep one point of contact from first enquiry to after-sales: tell us what you are making and the conditions you work under, and we shortlist the closest matches from our supplier network, compare specifications and arrange samples before you commit to a bulk order. If something does not behave as expected, we work with the supplying partner on the cause and a practical fix, and stay with the case until it is settled. Email, WeChat or WhatsApp enquiries get a reply within 24 hours.

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