Polyester Resins
Orthophthalic Cooling Tower Grade Resin
A Samrat Poly Resins, India grade, SPR 201 CTG. Enquire with Samrat FRP Traders for supply, pricing and packaging in Nepal.
Price
PRICE ON REQUEST
Orthophthalic Cooling Tower Grade Resin pricing varies based on:
- Order Quantity
- Product / Resin Grade
- Current Raw Material Rates
Technical documents
Download Technical Data SheetPDFFull product rangeProduct catalogue · PDF, 16 pagesBrowse the document libraryDocuments issued by: Samrat Poly Resins, India
Thixotropic orthophthalic grade for sag-resistant lay-up on vertical and large surfaces.
Catalogue codeSPR 201 CTG
Thixotropic orthophthalic polyester resin
Resin chemistryOrthophthalic Polyester Resins (SPR 201)
- Manufacturer
- Samrat Poly Resins, Doraha, India
- Nepal supplier and importer
- Samrat FRP Traders
- Technical information issued by
- Samrat Poly Resins (2026 catalogue)
- Price, packaging, lead time in Nepal
- Confirmed on enquiry
About this product
SPR 201 CTG is the thixotropic grade of the orthophthalic (SPR 201) family. Thixotropy lets the wet resin stay where it is laid on a vertical or large surface instead of draining down it, which is what cooling-tower and wind-turbine lay-up needs.
The supplier lists cooling-tower FRP components, wind-turbine FRP components and sag-resistant lay-up on vertical surfaces. For cooling-tower work that faces more demanding water or chemical conditions, the isophthalic SPR 301 CT grade is the alternative route.
Samrat FRP Traders handles enquiries for this Samrat Poly Resins, India grade in Nepal. Pricing, packaging and availability are confirmed on enquiry.
What this means for buyers
Orthophthalic or isophthalic
Both families carry a cooling-tower grade. This one is orthophthalic; SPR 301 CT is isophthalic. Choose by the service conditions the tower will see.
Shares GP Clear’s published values
The catalogue gives this grade the same typical viscosity, gel time and styrene content as SPR 201 GPC. Its role is sag-resistant lay-up.
Key features
- Thixotropic orthophthalic polyester resin
- For sag-resistant lay-up on vertical and large surfaces
- Supplied non-accelerated
Typical specification
- Appearance
- Clear liquid
- Viscosity
- 350–450 cPs
- Gel time
- Under 8 minutes
- Styrene content
- 33–40%
- Supply condition
- Non-accelerated
- Reference cure system
- MEKP 1.5% + Cobalt Octoate 0.4% — added separately during use
Source: Samrat Poly Resins, India — product catalogue, 2026 edition (typical specification)
How to read these values
- These are typical values from the supplier’s product catalogue. They describe the grade; they are not batch guarantees or acceptance limits.
- Resin data does not guarantee the performance of a finished FRP component. Confirm suitability with a trial on your own process, reinforcement and cure conditions.
Applications and processes
Uses listed in the supplier’s catalogue.
- Cooling-tower FRP components
- Wind-turbine FRP components
- Sag-resistant lay-up on vertical surfaces
Limitations
- The catalogue classifies the grade as thixotropic but does not publish a thixotropic index or low-speed viscosity for it; the isophthalic SPR 301 CT does.
- The values shown are typical catalogue values for the grade, not batch guarantees, acceptance limits or a Technical Data Sheet. Confirm the current data before relying on a figure.
- Resin data does not describe a finished part. Strength, durability, fire behaviour and chemical resistance of a part depend on its design, reinforcement, process, cure and testing.
When to consider a different resin
These grades are made for a different situation. Match them against your own service conditions.
- Isophthalic Cooling Tower Grade Resin (SPR 301 CT)Sag-resistant lay-up where heat, chemical and corrosion resistance are wanted.
- GP Clear ResinThe work is general-purpose FRP with no special service condition.
Comparison table
| Criterion | Orthophthalic Cooling Tower Grade Resin (SPR 201 CTG) | Isophthalic Cooling Tower Grade Resin (SPR 301 CT) | GP Clear Resin |
|---|---|---|---|
| Chemistry | Orthophthalic unsaturated polyester | Isophthalic unsaturated polyester | Orthophthalic unsaturated polyester |
| Supply condition | Non-accelerated | Non-accelerated · thixotropic | Non-accelerated |
| Viscosity | 350–450 cPs | 400–650 cPs (viscosity — 60 rpm) | 350–450 cPs |
| Gel time | Under 8 minutes | 15–35 minutes at 25 °C | Under 8 minutes |
| Cure system | MEKP 1.5% + Cobalt Octoate 0.4% — added separately during use | MEKP 1.5% + Cobalt Octoate 0.4% — added separately during use | MEKP + cobalt octoate, dosed at the workshop |
| Listed uses | Cooling-tower FRP components; Wind-turbine FRP components; Sag-resistant lay-up on vertical surfaces | Cooling-tower composite components; Wind-energy composite components | General-purpose hand lay-up, spray-up, moulding and lamination |
| Choose when | Sag-resistant lay-up on vertical or large surfaces where orthophthalic chemistry is acceptable. | Sag-resistant lay-up where heat, chemical and corrosion resistance are wanted. | The work is general-purpose FRP with no special service condition. |
Sources: the 2026 product catalogue of Samrat Poly Resins, India for the catalogue grades, and each earlier product’s published Technical Data Sheet summary. Values are typical and were measured under the conditions each source states, so they are a guide to selection, not batch guarantees. Viscosities measured at different spindle speeds or shear conditions are not directly comparable.
Manufacturing and quality context
Samrat Poly Resins manufactures the grade in Doraha, Punjab, India. Its 2026 catalogue presents every grade under its resin chemistry and code and describes a quality inspection laboratory at Doraha. Batch-specific questions, gel-time or viscosity queries and clarification of catalogue values are answered by the manufacturer’s technical team.
The catalogue recommends a trial on the customer’s own process and reinforcement before commercial use: typical values are not a substitute for a trial. Technical and safety data sheets are issued grade by grade: this grade’s Technical Data Sheet is published on this page, and a Safety Data Sheet has not been issued for it here. Ask for the current revision before relying on a document.
Samrat FRP Traders supplies and imports the grade for Nepal and handles enquiries. It does not manufacture, reformulate or certify resins.
Related process guides
These guides are written for another grade. They explain the process; they do not approve this grade for it.
Handling and safety
- Use suitable personal protective equipment and adequate ventilation.
- Store resin, initiators and accelerators separately, in original sealed containers, cool, shaded and away from heat and ignition sources.
- Add the initiator and the accelerator to the resin separately, according to the confirmed process.
- Never mix a concentrated peroxide initiator directly with a cobalt accelerator.
Product details
Applications
Product comparisons
Frequently asked questions
How is it different from the isophthalic cooling-tower grade?
SPR 201 CTG is orthophthalic. SPR 301 CT is isophthalic, with heat, chemical and corrosion resistance listed by the supplier. The service conditions decide which family to use.
What does thixotropic mean here?
The resin thins while it is being worked and thickens again at rest, so it resists sagging on vertical surfaces.
Is a technical or safety data sheet available?
Yes. The supplier’s Technical Data Sheet for this grade is published on this page — Doc. Ref SPR-TDS-CTG, Rev. 01, September 2026, issued by Samrat Poly Resins, India. No Safety Data Sheet has been issued for this grade on this site; ask us and we will request the current one.
Is SPR 201 CTG only for cooling towers?
The catalogue lists cooling-tower and wind-turbine FRP components and sag-resistant lay-up on vertical surfaces.
How is it cured?
It is supplied non-accelerated; the reference cure is MEKP 1.5% with cobalt octoate 0.4%, each added separately.
Knowledge hub
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