SINOMER® PM841-M30 is a modified polythiol curing agent designed for rapid gelation and cure of epoxy resins, especially at low temperatures and in thin films. It offers significant advantages in fast repair, winter construction, and low-temperature applications compared to conventional curing agents. This product can rapidly cure epoxy resins such as BER-128 (E51) within 30 minutes. It is designed as an alternative to GABEPRO GPM-830CB.
SINOMER® PM841-M30
(30-Minute Cure Modified Polythiol Curing Agent for Epoxy Systems)
SINOMER® PM841-M30 is a modified polythiol curing agent designed for rapid gelation and cure of epoxy resins, especially at low temperatures and in thin films. It offers significant advantages in fast repair, winter construction, and low-temperature applications compared to conventional curing agents. This product can rapidly cure epoxy resins such as BER-128 (E51) within 30 minutes. It is designed as an alternative to GABEPRO GPM-830CB.
Appearance | Light yellow transparent liquid |
Viscosity @ 25°C (mPa·s) | 10,000 – 15,000 |
Color (Pt-Co) | < 2 |
Mix Ratio (with BER-128 (E51), EEW 195) | 1:1 |
Gel Time (30°C) | Around 25 ~ 30min |
Lap Shear Strength (MPa) | 22.8 |
Tensile Strength (MPa) | 53 |
Compressive Strength (MPa) | 64 |
Tg (°C) | 42 |
Fast curing, even in thin films
Light color and high transparency
Low odor
Excellent low-temperature curing performance
Suitable for rapid bonding, lamination, and casting
Rapid bonding
Lamination
Casting
Craft ornaments
Electronic and electrical components
Civil engineering and construction
Composites
Photovoltaic and new energy industries
Mix ratio: 1:1 with standard Bisphenol A epoxy resin (EEW ~195) is recommended as a starting point. Optimize based on specific epoxy grade and performance requirements.
Gel time at 30°C: approximately 25 minutes 30 seconds (average of 5 tests).
Pot life: short. Plan application accordingly.
Apply within pot life. For thin film applications, ensure even coating.
Cure at ambient temperature. Low temperatures will prolong curing time
25kg/drum or 220 kg/drum
| SINOMER® Polythiol & Mercaptan Curing Agents — Cross-Reference & Selection Guide | ||||
| Sinocure Chemical Group | Low-Temperature, Rapid Curing & Optical Monomers | www.sinocurechem.com | ||||
| SINOMER® Grade | Chemical Class / CAS No. | Typical Gel / Cure Time | Product Profile & Application Systems | International Benchmark Equivalents |
| SINOMER® PM839 | Polymercaptan Base Resin CAS: Proprietary Polymer | Adjustable (2 – 60 min) Controlled via accelerator | Unaccelerated base polymercaptan. Offers formulators total freedom to adjust cure kinetics and pot life with tertiary amines (e.g. DMP-30). Ideal for PV slicing, electronics, and coatings. | • Capcure® 3-800 (Gabriel / Huntsman) • GABEPRO® GPM-800 • Polythiol QE-340M (Toray) • Thiocure® 1200 (Bruno Bock) |
| SINOMER® PM839-S40 | Modified Polythiol CAS: Polymer System | Approx. 40 Seconds (@ 25°C, 20g mass) | Ultra-fast curing polythiol system. Delivers instant gelation and rapid bond strength development for emergency repairs, fast patch kits, and high-speed automated positioning. | • CAPCURE® 40 SEC HV • GABEPRO® GPM-890CB • GABEPRO® GPM-895FC |
| SINOMER® PM840-M5 (PM840 PA) | Pre-Accelerated Polythiol CAS: Polymer System | 5 – 8 Minutes (@ 25°C, 1:1 with E51) | Ready-to-use 1:1 fast-curing polymercaptan hardener with built-in catalyst. Direct drop-in for dual-syringe consumer DIY adhesives, electronics tacking, and cold-weather road repair. | • GABEPRO® GPM-888 • GABEPRO® GPM-891 • CAPCURE® 3830-81 • CAPCURE® 3850-101 |
| SINOMER® PM840-M10 | Modified Polythiol CAS: Polymer System | Approx. 10 Minutes (@ 30°C, 1:1 with E51) | Modified fast polythiol curing agent with balanced 10-minute working time. Features high optical clarity and low residual odor for jewelry, crafts, and precision electronics. | • 10-Minute Fast-Cure Polythiol Series • Standard 10-Min Fast Epoxy Hardeners |
| SINOMER® PM840-M15 | Modified Polythiol CAS: Polymer System | 13 – 15 Minutes (@ 25°C, 1:1 with E51) | Modified polythiol providing extended 13-15 minute pot life. Ideal for precision manual component alignment, multi-pin potting, and electronic encapsulation. | • 15-Minute Fast-Cure Polythiol Series |
| SINOMER® PM840-M20 | Modified Polythiol CAS: Polymer System | 16 – 20 Minutes (@ 25°C, 1:1 with E51) | Balanced medium-fast polythiol curing agent. Extended working life designed for composite lamination, civil engineering repairs, and sub-zero winter construction. | • 20-Minute Fast-Cure Polythiol Series |
| SINOMER® PM841-M30 (PM841 M) | Modified Polythiol CAS: Polymer System | 25 – 30 Minutes (@ 30°C, 1:1 with E51) | Modified polythiol curing agent with 25-30 min open time and high mechanical performance (Tensile 53 MPa, Tg 42°C). Excellent for structural bonding and casting. | • GABEPRO® GPM-830CB |
| SINOMER® TMPMP | Trifunctional Thiol Monomer CAS: 33007-83-9 | Rapid Crosslinking (Formulation dependent) | Trimethylolpropane Tris(3-mercaptopropionate). Low-viscosity trifunctional liquid crosslinker for epoxies, polyurethanes, radiation-curable coatings, and PCB solder masks. | • Thiocure® TMPMP (Bruno Bock) • TMPMP (Evans Chemetics) |
| SINOMER® PETMP | Tetrafunctional Thiol Monomer CAS: 7575-23-7 | Rapid High Crosslinking (Formulation dependent) | Pentaerythritol Tetrakis(3-mercaptopropionate). High-density tetrafunctional crosslinker for low-temperature epoxy curing, high-index optical resins, UV nail gels, and elastomers. | • Thiocure® PETMP (Bruno Bock) • PETMP (Evans Chemetics) • MR-7™ Optical Thiol Component |
| SINOMER® BMPT | Optical Polythiol Monomer CAS: 131538-00-6 | Rapid Optical Reaction (Formulation dependent) | 2,3-bis((2-mercaptoethyl)thio)-1-propanethiol. High refractive index (nD = 1.63) trifunctional monomer for 1.60/1.67 optical lenses, UV optical glues, and specialty epoxy modifiers. | • THIOCURE® DMPT (Bruno Bock) • MR-8™ Optical Thiol Component |
| * Custom Polythiol Synthesis: Sinocure Chemical Group offers tailored polymercaptan formulation services with customized gel times (2 min to 2 hours), tailored viscosities, and low-odor profiles. Contact: info@sinocurechem.com | www.sinocurechem.com | ||||
We offer a variety of options to help you find the right product for your application
Provide formulation optimization support for water-based/solvent-based systems
Full coverage of REACH, FDA, and GB standards
99.8% on-time delivery rate, 10,000-ton production capacity guarantee
