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Resin Casting

resin

Step by step resin casting projects

resin casting

Silicone Moulding Rubber

Silicone rubber is an ideal material for making molds of lifecastings and other objects used in sculpture, special effects and taxidermy. Read more...

Polyester Resin

Polyester resin is a low peak exothermic unsaturated resin used for making artificial marble and FRP products. It can be waxed, unwaxed; promoted and non-promoted. Polyester resin exhibits good transparency, light colour and high glossiness. This resin is most suitable for use in making; High Quality Artificial Marble, Onyx Marble, Clear Transparent Casting as well as being used in the process of Solid Surfacing.

The viscosity of Polyester resin is rather low in order to facilitate good wet out, fast bubble release and to accept high filler loading, thus assuring an easy processing. It is ideal for making a variety of casting objects such as flooring, bathroom bowls, table tops, bath units, artificial marble walls, R.T.M. and the like onyx marble.

Polyester resin can be used for clear casting as it possess low shrinkage, a high reflective index and a slow yellowing effect over time.

SPECIFICATIONS

Polyester resin has the following characteristics:
Appearance   Clear 
Viscosity at 30oC   3 to 6 poise 
Geltime at 30oC   4 to 7 minutes 
Cure Time at 30oC   13 to 20 minutes 
Peak Exothermic Temperature   110oC to 125oC 
Stability in the Dark below 25oC  6 months 

PROPERTIES

Pure Resin Casting polyester resin
Water Absorption, 7day value   0.35%
Barcol Hardness    498 BHC
Heat Distortion Temperature   67.3oC
Elongation at Break    3.2%
Specific Gravity of Liquid Resin at 25oC   1.13 kg/litre
Volume Shrinkage on Cure    7%
Volatile Content    40 to 43%
Flexural Strength    115.3 MPa
Flexural Modulus    3584.3 MPa
Tensile Strength    65.1MPa
Tensile Modulus    4358.9 Mpa

USAGE

Polyester laminating resin performs best when it is completely cured. To do so, a proper combination of catalyst and accelerator must be used at room temperature for a sufficient period of time. Generally, 1 percent of catalyst is used. Generally, 1 to 1.5 percent of catalyst together with 0.5 percent accelerator is needed.

Both quantities can be adjusted for a shorter or longer gel time by increasing or decreasing catalyst, accelerator, or both. As a rule, however, the amount of catalyst used should not exceed 2% and must not be less than 0.5% while that of accelerator should range between 0.4% and 1%. Be sure to measure accurately.

Accelerator must be completely mixed into the resin before catalyst is added in order to avoid a direct blending which due to a violent reaction may result in an EXPLOSION.

Since the viscosity increases as the storage period of resin lengthens, Styrene Monomer can be added to lower it to a desired level. However, excess of Styrene Monomer added will affect the quality of resin.

However owing to difficulties in presenting information applicable to all situations, no warranty is expressed or implied and users are recommended to carry out their own tests to determine the applicability of the above information and the suitability of SHCP resin for their particular requirements.

STORAGE

Polyester resin will remain stable for about 6 months from date of factory manufacturing provided resin is stored in the dark, is not exposed to moisture and is stored below 25 deg.C. The containers should not be opened until they are required for use. Their stability however deteriorates markedly at higher temperatures, especially when they are directly exposed to sunlight. It is advisable to finish it within three months.

Crystal Clear

GENERAL DESCRIPTION

Crystal Clear is a low peak exothermic unsaturated polyester resin of orthophthalic type for making decorative castings. It is non-waxed but promoted, and can be waxed upon request.

Clear and transparent. It possesses low shrinkage and is ideal for making a variety of casting objects such as imitation jewels, ornaments, panels, trays, etc.

SPECIFICATION

Crystal Clear polyester resin has the following characteristics:
Appearance   Clear
Viscosity at 30oC   3 to 4 poise
Geltime at 30oC   30 to 50 mins
Cure Time at 30oC   60 to 80 mins
Shrinkage   5%
Stability in the Dark below 25oC   6 months

USAGE

Crystal Clear polyester resin performs best when it is completely cured. To do so, a proper combination of catalyst and accelerator must be used at room temperature for a sufficient period of time. Generally, 1 percent of catalyst together with 0.5 percent of accelerator is used.

Adjustments for shorter or longer geltime can be achieved by ranging the quantities of catalyst and/or accelerator used. As a rule, however, the amount of catalyst used should not be more than 2% or less than 0.5% while that of accelerator should range between 0.4% and 1%. Be sure to measure accurately. When used with filler, depend on the percentage of filler being added the amount of catalyst will need to be adjusted accordingly for the desired geltime.

Ensure that the accelerator must be completely mixed into the resin before catalyst is added in order to avoid a direct blending which due to a violent reaction may result in an EXPLOSION.

Since the viscosity increased as the storage period of resin lengthens, Styrene Monomer can be added to lower it to a desired level.

However owing to difficulties in presenting information applicable to all situations, no warranty is expressed or implied and users are recommended to carry out their own tests to determine the applicability of the above information and the suitability of resin for their particular requirements.

STORAGE

Polyester resin will remain stable if stored in the dark and at temperatures below 25oC. Their stability however deteriorates markedly at higher temperatures, especially when directly exposed to sunlight. Hence they should be kept in a cool, dark place.

Related links

Silcone rubber
Moulds
Mould making

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