Water resistance of adhesive base material
Insulating waterproof material for underwater/indoor/outdoor LEDs
Since it does not contain ether or ester groups, it has excellent water resistance, low moisture permeability, low water absorption, heat and humidity resistance, and moisture resistance.
In the civil engineering and construction fields, it is used in coating film waterproofing materials, sheet waterproofing materials, spray waterproofing materials, concrete protection materials, paints (for exterior use), etc.
In addition to insulating and waterproofing materials for semiconductors that require water resistance, LEDs for underwater and indoor/outdoor use, etc., it is also used as an anti-corrosion material for lining pools and water tanks, anti-corrosion for steel pipes and sheet piles, and anti-corrosion injection material for cables. I am.
It also has excellent chemical resistance and can be used in applications that require chemical resistance.
Humid heat resistance
Hydroxyl Terminated Poly butadiene™ polyurethane has superior moisture and heat resistance compared to general polyurethane. Additionally, the polybutadiene skeleton of Hydroxyl Terminated Poly butadiene™ polyurethane has a structure that is less susceptible to hydrolysis compared to polyurethanes with an ether skeleton or ester skeleton.
Hardness change at temperature 100℃ and relative humidity 95%
Moisture-proof
Hydroxyl Terminated Poly butadiene™ polyurethane has better moisture resistance than silicone resin.
| material | Water vapor permeability (g/m 2 ・24hr) |
|---|---|
| Hydroxyl Terminated Poly butadiene™ R-45HT cured product | 38 |
| Hydroxyl Terminated Poly butadiene™ R-15HT cured product | 27 |
| Hydroxyl terminated liquid Poly isoprene™ cured product | 19 |
| Hydroxyl terminated liquid Poly olefin™ cured product | 19 |
| 2-component curing silicone cured product | 220 |
| 1-component RTV silicone rubber | 1300 or more |
* Bold items are Idemitsu Kosan products.