Rock Bolt Grade Resin
SPR 301 RBIsophthalic liquid base resin for rock-bolt anchoring compounds — not a finished capsuleSPR 301 · Isophthalic Polyester Resins
High-strength isophthalic liquid base resin used to manufacture rock-bolt anchoring compounds.
Review the official product data sheet for specifications and application information.
Price
Price on Request
Industrial resin pricing varies based on:
- Order Quantity
- Resin Grade
- Current Raw Material Rates
Product details
| Catalogue Code | SPR 301 RB |
|---|---|
| Resin Chemistry | Isophthalic unsaturated polyester |
| Supplied Form | Liquid base resin for anchoring-compound manufacture |
| Supply Condition | Non-accelerated |
| Reference Cure System | BPO 7% + Cobalt Octoate approximately 0.4% — added separately during use |
Typical specification
| Appearance | Viscous liquid resin |
|---|---|
| Viscosity | 2,000–3,500 cPs |
| Gel Time | Ultra-fast grades 15 seconds–2 minutes · delayed grades 5–30+ minutes |
| Specific Gravity | Approximately 1.12 |
| Styrene Content | 35–39% by weight |
Typical values from the Samrat Poly Resins product catalogue, 2026 edition. They are not guaranteed specifications or finished-component properties; confirm the current values for your order and trial the grade on your own process.
SPR 301 RB is a high-strength isophthalic liquid base resin with excellent mechanical properties, per the catalogue, used to manufacture rock-bolt anchoring compounds for mining reinforcement systems. It is the liquid resin supplied to the compound maker — not the finished mineral-filled mastic or capsule. It is supplied non-accelerated; the catalogue's reference cure system is BPO 7% with cobalt octoate at approximately 0.4%, added separately during use.
Samrat Poly Resins supplies the base resin only. Filler, compound design, capsule packaging and the anchoring performance of the finished system are the compound manufacturer's product and test responsibility.
Key features
- Isophthalic liquid base resin for rock-bolt anchoring compounds (SPR 301 RB)
- High strength and excellent mechanical properties, per the catalogue
- Gel-time range from ultra-fast (15 seconds–2 minutes) to delayed (5–30+ minutes) grades
- Reference cure system BPO 7% + cobalt octoate ~0.4%, added separately
Applications
- Manufacture of rock-bolt anchoring compounds
- Mining reinforcement systems
Product role
Resin rock-bolt anchoring uses a filled polyester compound that cures around the bolt in the drill hole. SPR 301 RB is the resin that goes into that compound: the catalogue is explicit that it is the liquid base resin, not the finished mineral-filled mastic or capsule.
The catalogue gives two gel-time bands — ultra-fast grades at 15 seconds to 2 minutes and delayed grades at 5 to 30+ minutes — so state which band the compound design needs when enquiring. The cure system is BPO-based, not the MEKP system used by the other SPR 301 grades.
Supply and cure
- Supply condition
- Non-accelerated
- Reference cure system
- BPO 7% + Cobalt Octoate approximately 0.4% — added separately during use
Reference cure system, exactly as the catalogue prints it: BPO 7% + cobalt octoate approximately 0.4% — added separately during use.
Processes and where this grade fits
SPR 301 RB is supplied to manufacturers of anchoring compounds. It is the liquid base resin, not a finished capsule or cartridge for use underground.
| Process or use | Role of this grade | What to confirm |
|---|---|---|
| Manufacture of rock-bolt anchoring compounds | Listed role | Filler system, compound viscosity, initiator paste and the gel-time band the product needs |
| Mining reinforcement systems | Listed role — through the finished compound | The finished anchoring product is designed, tested and supplied by the compound manufacturer |
| Direct use in a drill hole | Not how it is supplied | SPR 301 RB is a raw material for compound manufacture |
| General isophthalic laminating | Not this grade’s role | ISO Polyester Resin (SPR 301) |
Process-selection considerations
- Decide the gel-time band first. The catalogue gives ultra-fast grades at 15 seconds to 2 minutes and delayed grades at 5 to 30+ minutes; state which the compound needs.
- The reference cure is BPO-based — BPO 7% with cobalt octoate approximately 0.4%, added separately during use — not the MEKP system of the other SPR 301 grades.
- Describe the compound: filler type and loading, target compound viscosity and how the initiator is packaged.
- The base resin is viscous, 2,000–3,500 cPs typical, so mixing equipment and filler incorporation should be part of the trial.
- Share the anchoring product’s own test requirement. Pull-out and set performance belong to the finished compound and installation.
Limitations and trial requirements
- SPR 301 RB is not a finished anchoring product. Anchoring performance, pull-out strength and underground-use approvals belong to the compound manufacturer’s finished product.
- No mechanical or chemical-resistance data are published for the base resin.
- Gel time is highly sensitive to temperature, filler and initiator; the catalogue bands describe the grades, not a guaranteed set time in the field.
- Trial the grade on the real part, mould and shop conditions before production. The catalogue values are typical liquid-resin properties, not guaranteed limits or finished-part performance.
Before you select this grade
- The values on this page are typical. Final selection should be confirmed against your own process, a trial result and the current technical documentation for the grade.
- The Technical Data Sheet linked on this page carries these same typical values. No Safety Data Sheet is published on this site for this grade; request current safety information before use.
- Never mix a concentrated peroxide initiator directly with a cobalt accelerator. Add each to the resin separately, according to the confirmed process.
- Store resin, initiators and accelerators separately, in original sealed containers, cool, shaded and away from heat and ignition sources. Use suitable personal protective equipment and adequate ventilation.
