ENTROPY CLF fast hardener for BRT/CLR biobased resin

BRT is a general purpose, clear, optical gloss and UV resistant laminating resin for laminating white surfboards and for hot coating. Based on the entropic CLR - Clear Epoxy Resin, BRT can be combined with all CLR Clear hardeners. BRT is a USDA BioPreferred® certified product with a 30% biobase content.

Usage: white surfboards, standing paddle boards

Consumption: approx. 3 litres for 1 short board of 2 m and approx. 12 litres for 1 SUP or 2 long boards

Working temperature: optimal temperature from 21°C to 30°C

Working environment: Prefer low-humidity environments, especially for use outside the optimal temperature range for the product.

Application tips :

• For best results, mix the two components according to weight

• Always mix the product thoroughly for at least 2 minutes, scraping all surfaces of the container to ensure thorough mixing.

• It is preferable to use the product in a temperature-controlled environment within the optimal use limits of the product. Avoid cold ambient temperatures or high humidity.

• For optimum curing performance, ensure that surfaces are dry and free of all dirt, debris and/or oil. Surface preparation by mechanical sanding is strongly recommended.

• Perform pre-tests with the materials and processes being considered to fully understand the curing characteristics of the resin in your work environment and the compatibility of the resin with other materials.

• Avoid using BRT on dark coloured surfaces as the optical brightener may degrade the appearance!

Mechanical characteristics:

Tensile modulus (ASTM D638): 3.0 GPa

Tensile strength (ASTM D638): 65.5 MPa

Elongation (ASTM D638): 5%.

Flexural Modulus (ASTM D790): 3.0 GPa

Flexural strength (ASTM D790): 93.1 MPa

Compressive strength (ASTM D695): 78.1 MPa

Ultimate Tg: 56°C

Hardness (shore D): 70-80

Processing characteristics

Mixing ratio (by volume): 2:1

Mixing ratio (by weight): 100:43

Viscosity (A/B/Mixed at 25°C): 2040/280/1100 mPas

Component density (density at 25°C): 1.14 (resin), 1.01 (hardener) gcm-3

Density of the mixture (density at 25°C): 1.10 gcm-3

Operating time (at 25°C): 21 minutes

Dry to the touch (at 35°C): 4 hours

Recommended full cure: 7 days at 25°C

Environmental Features

VOC content (ASTM D2369): 31.5 g/l

Bio-based carbon content (ASTM D6866): 20%