Walk me through the 24 family: 24, 24B, 24C, 24CR, 24CR2 — what changed each time?21 Aug 02:26
All five records retrieved. There is no plain "24" in the set — the family's base is Batch 24 A. Here's the walk-through, all values verbatim from the Expt Table 2025 (block rows per provenance).
Common skeleton (all five): 3-step syntheses. Step 1: phosphorylate Sun Surfol R-1400 (P2O5, 45–50 °C 0.5 h then 70–75 °C 4.5 h, N2). Step 2: Epomine SP-018 + 2-ethyl hexyl acrylate (N2). Step 3: blend Step-1 product (85%) + Step-2 product (15%) at ~60 °C, N2, 4 h. Step-2 and the 85:15 blend ratio stay constant through the family.
What changed each time (Step 1 is where the action is):
Read: the family iterates on Step 1 acid value — 24 A/B run high AV (49.5 / 46.34); from 24 C onward AV is deliberately cut to ~39.8/39.7 by adding extra R-1400, which pulls final AV from 53 (24 A) down to the stable ~35.2–35.6 band, while amine value rises toward the 30.1 target. "CR/CR2" are scale-up repeats (850 g → 1700 g) of the AV-adjusted 24 C recipe.
Note: 24 B carries its own ELN PDF (Lab Batch 24 B.pdf); the others exist only as Expt-Table blocks in this drop. Verdicts are application/pigment-test remarks, not pass/fail lab data.
Common skeleton (all five): 3-step syntheses. Step 1: phosphorylate Sun Surfol R-1400 (P2O5, 45–50 °C 0.5 h then 70–75 °C 4.5 h, N2). Step 2: Epomine SP-018 + 2-ethyl hexyl acrylate (N2). Step 3: blend Step-1 product (85%) + Step-2 product (15%) at ~60 °C, N2, 4 h. Step-2 and the 85:15 blend ratio stay constant through the family.
What changed each time (Step 1 is where the action is):
- 24 A — R-1400 1010 g (HV-56), P2O5 47.16 g → Step 1 AV 49.5 (unadjusted). Step 3: AV 53, Amine 29.5, HV 65, SAP 85.9. Green strength/gloss inferior; Black & Red good.
- 24 B — R-1400 112 g, P2O5 4.5 g (smaller batch, from ELN PDF). Step 1 AV 46.34. Step 3: AV 37.97, Amine 27.8, HV 83. Green inferior; Black/Red/Violet/Blue good.
- 24 C — R-1400 450 g (HV-58), P2O5 22.03 g; AV adjusted down to 39.8 (remark: "180 gm AV-46.6 + 37.3 gm R-1400"). First batch with phosphate-ester composition (Mono 12/Di 75/Free acid 0.3). Step 3: AV 35.56, Amine 29.79. Green/Violet inferior.
- 24 CR — R-1400 850 g, P2O5 39.5 g; AV 39.8 (same adjustment method, larger scale). Step 3: AV 35.43, Amine 31.1. All pigments good (Black/Red/Orange/Yellow/White/Blue).
- 24 CR2 — R-1400 1700 g, P2O5 68.77 g; AV adjusted to 39.7 (Mono 8/Di 81/Free acid 0.25). Step 3: AV 35.25, Amine 30.9. No pigment-test remarks recorded for this batch.
Read: the family iterates on Step 1 acid value — 24 A/B run high AV (49.5 / 46.34); from 24 C onward AV is deliberately cut to ~39.8/39.7 by adding extra R-1400, which pulls final AV from 53 (24 A) down to the stable ~35.2–35.6 band, while amine value rises toward the 30.1 target. "CR/CR2" are scale-up repeats (850 g → 1700 g) of the AV-adjusted 24 C recipe.
Note: 24 B carries its own ELN PDF (Lab Batch 24 B.pdf); the others exist only as Expt-Table blocks in this drop. Verdicts are application/pigment-test remarks, not pass/fail lab data.
Sources
[28112025 9076 Expt Table 2025.xls, sheet 9076_Experiments, batch '24A' rows 101-105]
[28112025 9076 Expt Table 2025.xls, batch '24 C' rows 114-119]
[28112025 9076 Expt Table 2025.xls, batch '24 CR' rows 122-125]
[28112025 9076 Expt Table 2025.xls, batch '24 CR2' rows 127-132]
confidence: medium