1. Used as a binder for various inorganic materials, it produces molded products with excellent heat resistance and flame retardance.
2. This product crosslinkes quickly by heating to form cured materials with excellent solvent resistance and no thermal softening.
3. It has a large amount of residual scorching heat and exhibits near non-combustibility with very little smoke generation due to heating.
4. Excellent adhesion to Inorganic materials (i.e. mica).
5. Since this product is a solid resin, users can choose solvents.
   This product can be diluted with organic solvents (i.e. toluene, xylene and alcohol).
6. KR-220LP in powder form is also available.

Instruction for use

Mica laminated plates

1. Make sure it has the proper gelling time before use.
2. Please mix the following formula ratios and spray the mixture onto the laminated mica to achieve a silicone content of 8-10 %, and mold under the following conditions.

∗1

Acid-based catalyst, colorless clear liquid

(Not specified values)

∗2

Thickness 0.42mm

Molding compound (binder for inorganic filler)

The compound can be mixed to be 5-30% of the total compound and can be mixed by the following method.

1. Dry Blend

   Grind KR-220L with a 100 mesh pass and mix with inorganic filler at room temperature. If necessary, add 0.1 to 0.5 wt% of curing catalyst (aluminum-based, titanium-based, zinc-based) to KR-220L to obtain a compound with relatively good storage stability.

2. Solution Blend

   Mix KR-220L with inorganic filler in an appropriate solvent.
   Dissolve KR-220L in toluene, isopropyl alcohol, methyl ethyl ketone, etc. to a concentration of 30-50%. Then, add 0.1-0.5 wt% of curing catalyst(aluminum-based, titanium-based, zinc-based) to KR-220L if necessary. And then add inorganic filler and mix thoroughly.
   The compound is obtained by removing the solvent by means of decompression drying, spray drying, etc.

3. Melt Blending

   KR-220L melts and flows at 70 to 150℃, so a compound can be obtained by mixing it with inorganic fillers in a hot mill, etc., and adding a curing catalyst (aluminum-based, titanium-based, zinc-based) in an amount of 0.25wt% or less to KR-220L as needed.

The compound made as described above is in solid or powder form and can be pressure molded at 150-180℃. The molding time depends on the temperature, the presence or absence of catalyst, the type and amount of catalyst, but it requires 5 to 30 minutes. In addition, post-curing at 200°C for 2 to 6 hours improves the properties. For ceramicization, the temperature is increased from 200°C in steps of 20 to 50°C, and then fired at 600 to 1000°C. Note that some fuming is observed at 300-500℃.

Flame-retardant paints

The following mixing ratios can be kneaded in a ball mill to produce flame-retardant coatings that are nearly noncombustible.

Composition	KR-220L 15 parts Silica powder 10 parts Red iron oxide 5 parts Talc 40 parts Clay 30 parts Methanol 80 parts Toluene 20 parts