Betaine anhydrous
【Characteristics】
107 silicone rubber is a silicone material with hydroxyl groups at both ends of the molecule, which is polymerized from siloxane monomers.
Its structural formula is as follows: HO-Si(CH3)2O[Si(CH3)2O]nSi(CH3)2-OH
The chemical name is a, w-dihydroxy polydimethylsiloxane, and it is customary to call hydroxy silicone oil with a viscosity of 2500 mPa. S or more as 107 silicone rubber. In addition to the general properties of methyl silicone oil, this product also has the reactivity of hydroxyl groups, which can be used to make some new materials, or cross-linked into elastomers (or membranes).
This product is colorless and transparent liquid, with excellent electrical insulation and high and low temperature resistance, high flash point, low freezing point, can be used for a long time under the conditions of -50ºC ~ +250ºC, small viscosity-temperature coefficient, high compressibility, low surface tension , Good hydrophobicity and moisture resistance, chemical inertness, physiological inertness.
【Technical indicators】
Appearance: colorless transparent liquid.
Viscosity (25ºC, mpa.s): 50～100000 (can be customized according to user requirements).
Hydroxyl content (%): 0.5 to 3 (directly related to viscosity).
【Application】
Used as the main raw material in RTV mold silicone rubber, defoamer, and silicone glass glue.
1. Because of its good electrical insulation, it can be used as an insulating moisture-proof, shock-proof and heat-resistant filling sealing material for electronic components and assemblies such as radios, electronic instruments, and semiconductors.
2. It is used as rubber roller material in automobile and machinery industries.
3. It is used as rubber roller material in textile, plastic and printing industries.
4. Caulking and sealing materials in the construction industry.
5. It has very good demoulding properties, especially suitable for the manufacture of precision molds and impression materials.
【Dosage】
Generally, it is used together with a curing agent to achieve cross-linking and curing. When used for release paper, it must be fixed with a coupling agent. Generally, the amount of curing agent accounts for 3-5% of the base glue, and the coupling agent accounts for 0.5-1% of the base glue. %, in most cases, dilute the base glue by 10 times with solvent, then add the curing agent and coupling agent, stir evenly, and then coat it on the surface of the substrate, and cure at room temperature or heating. It takes more than 30 minutes at room temperature, and 30 seconds when heated at 120-150ºC. Solvent-free for sealants and mold bases. After adding the curing agent, stir well (one-component and two-component curing agents are different), and it can be cured in 30 to 120 minutes after defoaming.
【Precautions】
Can not be mixed with acid and alkali substances, alkoxysilanes and water vapor at high temperature, otherwise there is a tendency to cure and viscosity change.
【Packaging and Storage】
1. This product should be sealed and stored in a clean plastic bucket, and should not be in contact with strong acids and strong alkalis;
2. Store in a cool and ventilated place at room temperature;
3. Store and transport as non-toxic and non-dangerous goods.