SINOMER® PM840 PA is a pre-accelerated polymercaptan epoxy curing agent containing a built-in amine catalyst system. It is designed for fast curing of epoxy resins at ambient and low temperatures, even in thin film applications. The product is supplied as a clear, ready-to-use liquid and does not require additional catalyst addition, simplifying formulation and ensuring consistent curing performance.
This product serves as an effective alternative to Huntsman GABEPRO GPM-888, offering comparable curing speed and reliability. It is ideally suited for applications requiring rapid strength development, excellent adhesion to various substrates, and reliable performance under challenging conditions.
SINOMER® PM840 PA
(Pre-Accelerated Polymercaptan Epoxy Curing Agent)
5-Minute Fast-Cure at Low Temperature & Thin Film | Ready-to-Use | Alternative to GABEPRO GPM-888
SINOMER® PM840 PA is a pre-accelerated polymercaptan epoxy curing agent containing a built-in amine catalyst system. It is designed for fast curing of epoxy resins at ambient and low temperatures, even in thin film applications. The product is supplied as a clear, ready-to-use liquid and does not require additional catalyst addition, simplifying formulation and ensuring consistent curing performance.
This product serves as an effective alternative to Huntsman GABEPRO GPM-888, offering comparable curing speed and reliability. It is ideally suited for applications requiring rapid strength development, excellent adhesion to various substrates, and reliable performance under challenging conditions.
| 检验项目 (Item) | 指标要求 (Specification) |
| 外观 (Appearance) | 淡黄色透明液体 |
| Mercapto equivalent weight (meq/g) | ≥ 3.0 |
| Total chlorine content (ppm) | ≤ 800 |
| Viscosity @ 25°C (mPa·s) | 10,000 – 15,000 |
| pH value (1% water solution) | 9.0 – 10.0 |
Pre-accelerated formulation-Ready to use; no need for external catalysts
Rapid cure – Fast strength development at room temperature and low temperatures (down to -5°C)
Thin film cure – Effective even in thin bond lines where conventional amines may fail
Low temperature performance – Cures reliably in cold environments
Excellent adhesion – Bonds well to metals, glass, ceramics, and plastics
Low viscosity – Good wetting and penetration into substrates
Low color – Suitable for applications where appearance is important
Direct replacement – Compatible with existing GPM-888 formulations with minimal adjustments
Epoxy resin low-temperature rapid curing systems
Structural adhesives for automotive and industrial assembly
Jewelry and craft bonding
Electronic adhesives and encapsulation
Anti-corrosion coatings and floorings
Repair compounds and patching kits
Road marking adhesives
| 检验项目 (Item) | 指标要求 (Specification) |
| Component | Parts by weight |
| Epoxy resin (EEW ~190, e.g., Bisphenol A type) | 100 |
| SINOMER® PM840 PA | 80 – 120 |
| 检验项目 (Item) | 指标要求 (Specification) |
| Condition | Gel Time Lap Shear Strength (24h) |
| 25°C, 70% RH | ~2-8 min ≥ 18 MPa |
| -5°C | ~20-30 min ≥ 10 MPa |
| 检验项目 (Item) | 指标要求 (Specification) |
| Product Name | Cas No. |
| Chemical Name | Synonyms/Application |
| ▶Sinomer® PETMP | 7575-23-7 |
| Penta-erythritol tetrakis(3-mercaptopropionate) | THIOCURE PETMP;PET-3-MP;Tetra (3-mercaptopropionate) |
| ▶Sinomer® BMES | 3570-55-6 |
| Bis(2-mercaptoethyl) sulfide;Dimercapto diethyl sulfide;2,2′-Thiodiethanethiol; | THIOCURE DMDS;Polythiol DMDS |
| ▶Sinomer® BMPT | 131538-00-6 |
| 2,3-bis((2-mercaptoethyl)thio)-1-propanethiol | THIOCURE DMPT;Polythiol DMPT |
| ▶Sinomer® PM839 | 72244-98-5;101359-87-9 |
| Poly[oxy(methyl-1,2-ethanediyl)],.alpha.-hydro-.omega.-hydroxy-, ether with 2,2-bis(hydroxymethyl)-1,3-propanediol (4:1), 2-hydroxy-3-mercaptopropyl ether | Epoxy curing agent,Capcure 3-800;GABEPRO GPM-800;Polythiol QE-340M;Thiocure 1200 |
| ▶Sinomer® TMPMP | 33007-83-9 |
| Trimethylolpropane Tris(3-mercaptopropionate) | / |
| ▶Sinomer®OM835 | 188829-97-2 |
| Bis(thiiran-2-ylmethyl)sulfane;1,1′-Thiobis(2,3-epithiopropane);Bis(2,3-ethylpropyl) sulfide | high refractive index optical monomer |
| ▶Sinomer® OM265 | 39667-72-6 |
| 2-Propenoic acid, 2-(2-benzothiazolylthio)ethyl ester;(2-(2-benzothiazolylthio)ethyl)acrylate;MBTA | high refractive indexoptical monomer |
| ▶Sinomer® OM258 | 97049-32-0 |
| 2-Naphthalenylthioethyl acrylate;2-Propenoic acid 2-(2-naphthalenylthio)ethyl ester;NTEA | high refractive indexoptical monomer |
| ▶Sinomer® OM386 | 129283-82-5 |
| Bis(4-Methacryloylthiophenyl) Sulfide;4,4'-Thiodibenzenedithiol Dimethacrylate | high refractive index optical monomer |
| ▶Sinomer® PETMA | 10193-99-4 |
| Penta-erythritol tetrakis(2-mercaptoacetate) | coupling agent |
| ▶Sinomer® EGDMP | 22504-50-3 |
| Ethylene Glycol Bis(3-Mercaptopropionate) | cross-linking agent,curing agent |
| ▶Sinomer® GDMA | 123-81-9 |
| Glycoldimercaptoacetete;Ethylene di(S-thioacetate) | PVC heat stabilizer |
| ▶Sinomer® EHMP | 50448-95-8 |
| 2-Ethylhexyl 3-Mercaptopropionate | Sulfur-tin stabilizer |
| ▶Sinomer® GMT80 | 30618-84-9 |
| Glyceryl monothioglycolate | daily chemical |
