Polyetheramine Supplier: Diamines, Triamines and Monoamines for Epoxy, Polyurea and Dispersants

RS-D230 is specified at an amine value of 454 to 488 mg KOH/g; RS-D400, at 4.0 to 4.6 meq/g. A buyer comparing the bare numbers has already gone wrong: the scales differ by a factor of 56.1, the molecular weight of potassium hydroxide. Neither figure sets the dose. The amine hydrogen equivalent weight does, and it is the first figure to find for any polyetheramine grade.

Polyetheramine grades and data sheets

Quote by RS code. Grades share a generic name, and four of the diamines share CAS 9046-10-0, so the RS code and the grade designation (polyetheramine D-230, polyetheramine T-403 and so on) are what identify the material on a purchase order. Each value keeps the unit its grade is specified in.

The full appearance and primary amine content of each grade are in its sub-family table below; pack details are under Packaging.

Quote any grade by its RS code. Every shipment carries the lot COA, samples are available for cure trials, and on request the desk drafts a side-by-side qualification protocol against the grade in your current formula. Packs run from drum to ISO tank.

Which polyoxypropylene diamines and triamines fit an epoxy cure?

Two equivalent weights fix the dose: parts per hundred resin equal AHEW × 100 ÷ the resin’s epoxy equivalent weight. Against the same resin, RS-D4000 (1000 g/eq) goes in at about 16.7 times the weight of RS-D230 (60 g/eq), 1000 ÷ 60. Each amine hydrogen drags far more polyether chain with it.

The low-molecular-weight grades are the hardeners. RS-D230, polyetheramine D-230, cures to relatively high elongation and good thermal-shock resistance, with viscosity held to 15 mPa·s at 25 °C. RS-D400, polyetheramine D-400, goes where the epoxy needs more flexibility, and into polyurethanes and thermoplastic polyamide adhesives.

RS-T403, polyetheramine T-403, is the trifunctional option at 81 g/eq, miscible with a range of solvents, water included. The third amine group buys crosslink density, and RS-T403 also brings improved flexibility and strength. Its primary amine floor is lower, 90.0 wt% against 95.0 wt% on RS-D230 and RS-D400, a line worth holding to on every lot.

Further up the molecular-weight scale, the same backbone turns from hardener to flexibilizer. RS-D2000, polyetheramine D-2000, with an AHEW of 505 g/eq, is a co-reactant for epoxies that need more flexibility and toughness.

Polyoxypropylene diamines and triamines for polyurea and RIM

Against an isocyanate the arithmetic changes. A primary amine group consumes one isocyanate group, though its two hydrogens can each open an epoxide. RS-D4000, polyetheramine D-4000, carries both figures: 1000 g/eq as AHEW, 2000 g/eq with isocyanates. Run a polyurea index on the epoxy figure and you have half the amine you think.

RS-D2000 is a key ingredient in polyurea and reaction injection molding (RIM), and RS-D4000 reacts fast with isocyanates. RS-T5000, polyetheramine T-5000, a triamine of about 5000 molecular weight, goes into spray polyurea elastomers. It carries acetylatables of 0.58 to 0.63 meq/g against an amine value of 0.50 to 0.57 meq/g. The gap is hydroxyl ends left unconverted by amination, and they react with isocyanate far more slowly than amine does. Specify both lines; if the gap widens from lot to lot, your effective index moves with it.

Where the shot gels too fast, RS-SD2001, polyetheramine SD-2001, is the secondary diamine derived from the 2000 molecular weight polyoxypropylene diamine, built for a slower cure and a lower exotherm.

For the hydroxyl side of a polyurethane or hybrid polyurea system, see the polyurethane polyols page.

Polyethylene-glycol-core diamines

RS-ED600 and RS-ED900, polyetheramine ED-600 and polyetheramine ED-900, are diamines on a propylene-oxide-capped polyethylene glycol core. The core makes them hydrophilic as well as flexible, and both go into polyamides modified for hydrophilicity.

Choose between them on reactive content: RS-ED600 carries an amine value of 3.0 to 3.43 mmol/g; RS-ED900, 1.8 to 2.25 mmol/g and an AHEW of 250 g/eq. Both allow 0.35 max % water, looser than the 0.25 max wt% on most polyoxypropylene grades, so set your own limit if moisture matters downstream.

Polyether monoamines

A monoamine has one reactive end, so it caps or grafts rather than extending a chain. RS-M2005, polyetheramine M-2005, controls molecular weight in polyamides and builds comb polymers on poly(acrylic acid). RS-M2070, polyetheramine M-2070, emulsifies water-based epoxy and serves in pressure-sensitive adhesives; RS-M1000, polyetheramine M-1000, goes into ore flotation and agricultural emulsifiers.

The propylene oxide to ethylene oxide ratio decides how hydrophilic each one is: about 3/19 for RS-M1000, a white waxy solid at room temperature, and about 29/6 for RS-M2005. Plan for melting before you meter the waxy grade.

What to put on the purchase order

Write these lines into the purchase order:

1. The RS code and the grade designation.
2. The equivalent weight you designed to, against epoxy or isocyanate.
3. The amine value with its unit and test method.
4. The color limit with its scale, APHA or Pt-Co.
5. The maximum water or moisture; limits run from 0.10 max % on RS-B100 to 0.35 max % on RS-ED600, RS-ED900 and RS-M600.
6. The minimum primary amine, where the grade specifies one.
7. The pack, its net weight and the delivery point.

Before a new grade replaces one already in your formula, agree the equivalent-weight and amine-value ranges in writing and run one side-by-side cure.

Packs: 200 kg drums; 200 kg drums (nitrogen blanketed); 1,000 kg IBC totes; ISO tank; 195 kg drums; 950 kg or 942 kg IBC totes; 200 kg net drums (nitrogen blanketed); bulk ISO tank. Name the pack and the net weight on the purchase order; drum and IBC net weights differ between grades.

A request for quotation gets the fastest answer when it carries: RS code; quantity and annual volume; pack (drum / IBC / ISO tank); delivery point; application (epoxy cure, polyurea, dispersant, other); specification sheet or target values.

What the certificate of analysis shows

A COA reports the lot against the sales specification: appearance, color, amine value, water or moisture, and primary amine where the grade has one. Specific gravity, refractive index and AHEW are typical values that a lot is not released against.

If your dose depends on AHEW, check it against each lot’s amine value. For a grade whose amine groups are all primary, AHEW in g/eq is 1,000 divided by twice the amine value in meq/g; for an all-secondary diamine it is 1,000 divided by the amine value, close enough for RS-SD2001 with its primary amine capped at 5 max %.

The same arithmetic estimates an AHEW for RS-T5000 and RS-SD2001, for which we publish none. The lot COA governs.

Regulatory status by grade

Check each grade’s CAS against the EPA TSCA Inventory before the first purchase order; EPA keeps the list under TSCA section 8(b), 15 U.S.C. 2607(b).

Industries served

Packaging, documents and quotes

Each product page carries the grade’s specification and its quote form; “Request quote” in the grade table opens that form directly.

Other polyetheramine product pages

These polyetheramines are in the catalog without a published specification on this page yet; request a quote from each product page.

Related polyetheramine pages