1

Insufficient   flame retardancy — fails EN 13501, ASTM E84, UL 94, TB 117, FMVSS 302.

Insufficient   TCPP loading, low-purity TCPP with reduced phosphorus content, poor   dispersion, lack of synergist.

Use   high-purity TCPP (≥99.5%) with guaranteed phosphorus content (9.0–10.0%);   optimize loading based on target standard (5–25 php/wt%); recommend   melamine/APP synergist for higher ratings; ensure uniform TCPP dispersion via   proper mixing; provide flame test data and formulation guidance.

2

High   flame retardant loading — increased cost, degraded mechanical properties,   processing issues.

Low-efficiency   flame retardant, incorrect synergistic system, over-engineering for target   standard.

Use   high-purity TCPP for maximum efficiency at minimum loading; recommend   synergistic combination (TCPP + melamine) to reduce total loading; match   loading to specific fire standard (not over-engineered); provide cost-performance   optimization analysis; recommend high-phosphorus grade.

3

Poor   compatibility / blooming — phase separation, exudation, surface defects,   inconsistent performance.

TCPP   polarity mismatch with polymer, low-purity TCPP with impurities, excessive   loading, improper mixing.

Specify   high-purity TCPP (≥99.5%) with minimal impurities; ensure TCPP is fully   miscible with polyol/resin (test compatibility first); control loading within   recommended range; recommend proper mixing temperature (25–50°C) and time;   use pre-dispersed TCPP masterbatch if needed.

4

Thermal   instability during processing — decomposition, discoloration, gas formation,   equipment corrosion.

High   acid value in TCPP, excessive processing temperature, moisture-induced   hydrolysis, metal catalysis.

Use   low-acid-value TCPP (<0.1 mg KOH/g) to prevent corrosion and   decomposition; ensure processing temperature <200°C (TCPP stability   limit); control moisture (<0.1%) to prevent hydrolysis; use stainless   steel equipment for high-temperature processing; provide thermal stability   data.

5

Solvent   evaporation rate mismatch — film defects (pinholes, orange peel, blushing),   poor flow/leveling.

Incorrect   solvent boiling point, humidity during application, incompatible solvent   blend, insufficient slow solvent.

Select   DPMA (bp 200–210°C) as slow-evaporating solvent for flow/leveling; blend with   faster solvents for optimal evaporation profile; control application humidity   (<70% RH); ensure solvent compatibility with resin system; provide   evaporation rate data and formulation guidance; recommend Solketal as   renewable slow solvent alternative.

6

Insufficient   solvency power — resin incompatibility, viscosity issues, pigment dispersion   problems.

Incorrect   solvent selection, low-purity solvent with reduced solvency, resin-solvent   polarity mismatch.

Select   DPMA for broad solvency (acrylic, epoxy, polyester, PU, nitrocellulose); use   high-purity grade (≥99.0%) for consistent solvency; consider Solketal for   polar/non-polar dual solvency; test resin solubility before formulation;   recommend solvent blend for optimal viscosity; provide solubility parameter   data.

7

Regulatory   compliance complexity — REACH, RoHS, Prop 65, VOC regulations, varying   regional standards.

Unregistered   substances, high-VOC solvent, restricted impurities, lack of documentation.

Ensure   all products (TCPP, DPMA, Solketal) are REACH-registered; provide full SDS   and regulatory documentation; offer low-VOC and high-solids formulation   guidance; confirm no RoHS-restricted substances; provide Prop 65 compliance   data; offer bio-based Solketal as renewable alternative for green   regulations; maintain updated regulatory files.

8

Bio-based   solvent consistency — renewable feedstock variability, quality inconsistency,   cost competitiveness.

Glycerol   feedstock quality variation, production process inconsistency, purification   level differences.

Specify   Solketal with tight purity specification (≥98.0%); require consistent   glycerol feedstock source; ensure controlled production process with batch   QC; provide COA for every lot; offer cost-performance comparison with   petroleum-based solvents; ensure stable supply with backup production   capacity; provide renewable content certification.

9

Moisture   sensitivity / storage stability — hydrolysis, acid value drift, performance   degradation.

High   moisture in product, improper storage (open containers, high humidity), long   storage time.

Specify   low-moisture products (TCPP <0.1%, DPMA <0.1%, Solketal <0.1%); use   nitrogen-blanketed drums/IBCs; recommend storage in cool, dry area (15–25°C,   <60% RH); ensure sealed containers; provide shelf-life data (typically   12–24 months); recommend moisture testing before use; use desiccant if   needed.