Shin-Etsu Silicone Oligomer KR500

silicon Ketone Oligomer KR500

KR-500 is a methoxy-containing methyl silicone oligomer thing. Blended with organic resins containing methoxysilyl reactive groups, or used in methanol cure processes to impart heat, weather and chemical resistance.

General Attributes

Use Description

KR-500 can be used as a room temperature curing coating agent (the reaction mechanism is shown below) . Alkyl titanates are suitable curing catalysts.

Reaction Mechanism

2≡Si-OCH3+H2O→≡Si-O-Si≡+2CH3OH

KR-500 is also used as a reactive diluent for acrylic and other organic resins. KR-500 reacts with active hydroxyl groups in organic resins to form copolymers.

Reaction Mechanism

≡Si-OCH3+HO-CR→≡Si-O-CR+CH3OH

The reaction must be heated (140-160°C), alkyl titanate can Acts as a catalyst to speed up the reaction. The coating produced by this modification process is very hard, but the adhesion to the substrate is reduced and the coating tends to be brittle.

KR-500 is prone to self-condensation during the modification reaction, so the reaction must under relatively mild conditions.

Processing Note

1) It must be tightly sealed and stored in a ventilated, cool and dark place (25 °C or below, keep away from direct sunlight), keep away from heat and flame. forTo maintain quality, store this product in a non-humid area.

2) Also when painting, coating, curing or drying, it is important It is to keep the product away from heat and drafts and provide adequate ventilation.

3) Methanol is released during curing. When heat curing in a constant temperature oven, be sure to use a ventilation convection model to prevent the accumulation of explosive gases in the oven.

4) When using this product, care should be taken to prevent contact with skin and mucous membranes. In case of contact, wash immediately and thoroughly with soap and water or running water. In case of eye contact, immediately flush with water for at least 15 minutes and seek medical attention.

5) Breathing steam may cause dizziness or other unpleasant symptoms. If you have such symptoms, move to fresh air immediately.

6) Please read the Material Safety Data Sheet (MSDS) before use. MSDS can be obtained from our sales department.

Packaging

1kg (square can), 18kg (square can)