RTV 2 Silicone Rubber

RTV-2 silicones are two-component, Room Temperature Vulcanization silicone rubbers, gels or foams. Each part of the system comprises of either a crosslinker or a catalyst that will react when the two parts are mixed together to render the intended properties. It can be customized to produce variable degrees of viscosity, adherence and mechanical, chemical or temperature resistance characteristics.

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Product Overview

Description

RTV-2, two-component Room Temperature Vulcanizing, are silicone rubber formulations made by associating a base to curing elements. The curing is achieved by crosslinking, initiated by mixing the two components and occurs by condensation, using an organic-tin or, by addition reaction with a platinum catalyst.

Comparing RTV-2 to RTV-1 silicones

1. RTV-2 cures more rapidly

2. Crosslinking can be slightly accelerated by raising the ambient temperature

3. Curing of thick layers possible

4. Flowable, self-leveling or non-sag grades are available

5. Self-adhesive grades, with very good adhesion to a large range of substrates

Physical Properties

	RTV 2(MIDDLE GRADE)	RTV 2(HIGH GRADE)
Before solid
Appearance	white cream	white cream
1.Viscosity(25 °C)	8000-20000	20000-40000
After solid
2.Hardness(Shore A)	20-30	30-40
3.Elongation at break(%)	25-35	30-40
4.Tensile strength(Mpa)	2.5-3.5	3.5-4.5
5.Tearing strength	1.5-2.0	2.5-3.0

Application

1. It could be the mould for art work, eg sculpture, furniture, ornament instrument accessory and so on;

2. Encapsulation for electron device, electric elements, and be the waterproof and insulated coatings .

3. Sealing for accessory of electric machine, auto, engine, chemical equipment and so on .

How to Use

Well-distributed mixing the two component with each other pro rata before using. General dosage: solid content 2-5%. Solid time will be decreased with the increase of the quantity of solid agent.

	solid agent	time
OH201	5%	forty minutes
OH202	5%	5% three to five hours

Attention

1. Expel the air bubble in use.

2. The material which has been added in solid agent must been used up.

3. Finished products will be the best effective after four days.

4. Solid agent will be kept away from water vapor.