Nachricht

Aromatic glycidyl ether is a mono-epoxide reactive diluent in which one glycidyl group is bonded to a phenol-derived ring. Yolatech supplies three grades of aromatic glycidyl ether: YLD-6001 (phenyl, CAS 122-60-1), YLD-6002 (o-cresyl, CAS 2210-79-9) and YLD-6004 (4-tert-butylphenyl, CAS 3101-60-8).

How an Aromatic Glycidyl Ether Lowers Viscosity

Each molecule carries one epoxy group, which reacts into the network instead of migrating out as an unreacted plasticiser would, so the viscosity drop is permanent. The YLD-6001 page states 2–8 mPa·s at 25 °C, low enough to thin a bisphenol A resin of 11000–15000 mPa·s at moderate loading.

With one epoxide per molecule the diluent also acts as a chain terminator, so dosage trades viscosity against crosslink density. The published epoxy equivalent tracks that trade-off: 165–205 g/eq for YLD-6002, 220–250 g/eq for YLD-6004.

Published Specifications of the Three Grades

Table 1. Values as published on the three product pages; an entry absent from the page is marked not stated. Water is limited to 0.1 % maximum on all three grades.

The YLD-6001 page publishes purity (minimum 98 %) instead of an epoxy equivalent. A calculated 150 g/eq follows from C9H10O2, molecular weight 150.17, and one epoxide per molecule; that value is theoretical and should be confirmed against the TDS. Inorganic chlorine is capped at 20 mg/kg on YLD-6002 and YLD-6004.

Dosage Calculated on the Bisphenol A Side

Dosage is set on the resin side. With YLH-9101 at AHEW 92 g/eq and YLE-128 at EEW 184–190 g/eq, the published recommendation is 48 phr, matching 100 × 92 ÷ 190 = 48.4. A monofunctional diluent shifts the mixed epoxy equivalent, and the dosage follows.

Table 2. Theoretical dosage for 100 parts YLE-128 with 15 parts diluent, calculated as 100 × AHEW ÷ mixed EEW.

At 15 phr the cresyl grade leaves dosage essentially unchanged, since its epoxy equivalent sits close to that of the base resin; the tert-butyl grade raises the mixed equivalent and lowers the requirement to 47 phr. A titration on the production batch remains the reference.

Selection Notes and Next Step

YLD-6001 gives the lowest viscosity and the strongest dilution per part, but its page publishes no epoxy equivalent. YLD-6002 pairs fast dilution with an equivalent close to a standard bisphenol A resin, which keeps stoichiometry stable. YLD-6004 has the highest viscosity and equivalent, suiting systems where extractable content matters more than thinning power.

A comparison at 10 and 20 phr on the target resin settles the choice faster than datasheet arithmetic. Sample and TDS requests for this line can be placed through the YLD-6002 grade page.