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Silicone resins

Silicone resins are composed of highly branched 3-dimensional polymers. They form coatings with outstanding heat resistance, weather resistance, electrical insulative properties, and water repellency. They generally dissolve in organic solvents, and are used in diverse applications to improve durability, safety, and reliability.

Features

Heat resistance

Siloxane bonds (Si-O-Si) form the backbone of the molecular structures of silicone resins. Siloxane bonds have high bonding energy and the temperature of thermal decomposition is high, so these resins have excellent heat resistance. There is typically no decomposition, degradation, or discoloration even in high-temperature conditions of 250°C or more.

Electrical insulative properties

Silicone resins exhibit excellent electrical properties over a wide temperature range. In particular, even at high temperatures there is little decline in electrical insulative properties, and good resistance to arcing.

Weather resistance

They exhibit outstanding weather resistance, with little degradation caused by UV rays or other elements. Coatings exhibit little yellowing, chalking, or loss of gloss, and they maintain stable coating properties over long periods.

Water repellency

Due to the orientation of the methyl groups in the molecules, the surface of the cured material has excellent water repellency.

High hardness

Silicone resins are highly branched 3-dimensional polymers, and the backbone structure of the cured material is similar to that of glass, so these materials can be used to modify surfaces to make them inorganic substances.

Typical Products

Category Type / Applications Grade Features
For
paints
Straight silicone resin KR-282 Good balance between drying properties and film characteristics.
KR-311 Forms relatively hard films. Good drying properties.
Silicone resin for modification KR-211 Best miscibility with other organic resin.
KR-216 Forms the hardest films.
KR-213
KR-9218
Ideal for cooking with polyesters, alkyds, epoxies, etc.
Silicone alkyd resin KR-5206 For room-temperature drying.
Silicone epoxy resin ES-1001N Typical silicone epoxy resin.
ES-1002T Curing agent for eoxy can also be used.
ES-1023 Flexible with good adhesion and shelf-life.
Silicone polyester resin KR-5230
KR-5235
Flexibility. High gloss.
Silicone coating agent KR-400 High hardness. Non-solvent coating agent.
KR-401 Medium hardness. Non-solvent coating agent.
For
electricity
For surface damp-proofing KR-251 Forms the thinnest, hard, transparent films of all varnishes used for moisture-proofing of surfaces.
KR-255 Typical varnish for moisture-proofing.
KR-114A Soft, waxy film whch absorbs strain. Film can be removed with a solvent.
KR-112 Forms soft, solvent-resistant films.
For laminates KR-2610B Heat resistant, and molded items will have good mechanical strength.
For mica KR-242A Flame-resistant and low smoking.
For coil immersion KR-285 Low foaming during curing, and suitable for impregnation of large equpment.
For sleeve and cloth processing KR-2706 The most flexible of all varnishes for sleeves. Good heat resistance.
KR-165 Typical varnish for sleeves. Self-extinguishing. Good transparency.
KR-166 Self-extinguishing. Excellent film strength.
KR-169 Self-extinguishing. Good flexibility and heat resistance.
KR-2038 Non-solvent type. Self-extinguishing. Good heat resistance.
For resistor coating KR-221 Crack resistant.
KR-240 Fast curing. Particularly good resistance to solvents.
KR-220L Solid type. Flame-resistant and low smoking.
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