Low Profile Controlled Tooling Unsaturated Polyester Resin HS-243PTF

Principal Properties & Applications:

HS-243PTF is a filler-containing pre-promoted unsaturated polyester resin with good glass fiber wettability and sagging resistance, easy to construct. It is zero shrinkage, effectively reducing glass fiber impressions. With a rapid curing speed and a stable exothermic peak temperature, it is suitable for fast mold-making process. This resin enables the completion of molds within a single day, entirely replacing the traditional week-long mold-making procedures.

Specification of Liquid Resin:

* Curing system in GT test：AKZO M-50: 2.0%

Typical Values for Chopped Strand Mat Reinforcement (for reference only):

Curing system: 2% AKZO M-50, RTx24hrs + 60℃×3hrs + 110℃×2hrs.

Guidelines for Use:

• It is recommended to use a mold gel coat of good product quality, as it can provide good mechanical strength and chemical resistance.

• The mold gel coat should be applied in two coats, the first one being 0.4 to 0.45 mm thick, with a total thickness of 0.6 to 0.8 mm.

Application of mold resin HS-243PTF series:

• Before use, thoroughly mix the resin with mechanical mixing equipment.

• To achieve the best curing results, the addition of the curing agent M-50 should not be less than 1.2%.

• For the best performance of the mold resin, we recommend using HS-243PTF at a temperature between 18-25°C. Temperatures too low or layering less than 3 mm at a time will affect the resin's low shrinkage performance, while temperatures too high will shorten the gel time.

Mold Manufacturing Reference Process:

• When the surface of the mold gel coat is tacky to the touch without leaving residue on the hands, apply a uniform layer of mold resin on the gel coat surface. This will facilitate the subsequent impregnation of the surface mat.

• Lay one layer of 100 g/m² surface mat or two layers of 50 g/m2 surface mat, and use a dedicated de-bubbling roller for surface mats to eliminate air bubbles.

• Lay 6 layers of 300 g/m² chopped strand mat to achieve a thickness of 3-4 mm, using a de-bubbling roller to remove air bubbles with each layer of mat applied.

• After the resin has cured and the surface has completely turned white, you can begin the next phase of lay-up one hour later.

• For the next phase of lay-up, use 4 layers of 450 g/m2 chopped strand mat to achieve a thickness of about 3-4 mm. For higher mold strength requirements, a combination of mats or fabrics of similar thickness can be used for the lay-up. Use a de-bubbling roller to eliminate air bubbles with each layer of mat or fabric applied, and the resin turns white after curing.

• Repeat the above steps for lay-up to reach the desired layer thickness.

• After the lay-up is complete, proceed with the construction of mold support and reinforcement;

• Before demolding, it is recommended to cure at 40°C for 24 hours to achieve better results.

Attention and Storage:

• Choose the suitable resin according to prccess condition and technological requirements.

• Avoid exposure to heat sources such as direct sunlight or steam pipes. Stored in a dry place at temperatures below 25℃ and the shelf life is 6 months.

• Keep sealed to prevent moisture pick-up and monomer loss. Prolonged storage outside of recommended conditions can influence liquid resin properties like viscosity and gel time.

• Transportation should fit the State Council “Chemistry Dangerous Articles Safety Management Regulations”. Because it contains styrene monomer, it is hazardous and inflammable.