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Polyimide film tape -- 2016-11-17

In a variety of self-lubricating engineering plastics, polyimide as a result of outstanding thermal stability, mechanical properties, anti-radiation and solvent resistance, and in high temperature, high and low pressure and high speed and other extreme environments have good friction and wear properties , Is a class of potential applications in the field of tribology of the matrix material.Therefore, the tribological properties of various polyimides have been attracting more and more attentions ...

Physical properties of silicone -- 2016-11-16

Due to the unique structure of silicone,Both inorganic and organic materials, the performance of materials,With low surface tension, viscosity-temperature coefficient of small, high compressibility, high gas permeability and other basic properties,And has high temperature resistance, electrical insulation, oxidation stability, weatherability, flame retardant, hydrophobic, corrosion-resistant, non-toxic tasteless and physiological inertness, and other excellent features,Widely used in aerospace, ...

Silicone physical structure -- 2016-11-15

 (1)Adequate methyl groups on Si atoms shield the high-energy polysiloxane backbone; (2) C-H non-polarity, so that the interaction between molecules is very weak;(3)Si-O bond length is longer, Si-O-Si bond bond angle.(4) The Si-O bond is a covalent bond with a 50% ionic bond (the covalent bond has a directionality and the ion bond has no directionality).

Overview of Agricultural Silicone Surfactants: -- 2016-11-14

Surfactant BasicInformation:Pesticides andsurfactants: pesticide formulations can not be separated from the surfaceactive agent, pesticide formulations (including: EC, water emulsion,microemulsion, wet powder, soluble powder, dispersible granules, granules,etc.) Processing to add different types of surfactants.The addition of surfactants greatly reduces the surfacetension of the solution and enhances the wetting, spreading and adhesion of theagents in the plant or pest surface, thereby impro ...

Silicone resin -- 2016-11-11

Silicone resin (or silicon resin) Siliconepolymer is an important part of the Si-O-Si as the main chain, the siliconatoms associated with organic groups, with highly cross-linked semi-inorganicpolymers, it Is hydrolyzed from a polyfunctional organosilane to form asilicone prepolymer which is further crosslinked under heating or catalystcatalysis to an insoluble, non-molten solid silicone resin having athree-dimensional network structure. It may be a homopolymer of a monomer, or acopolymer of ...

Silicone oil -- 2016-11-10

Silicone oil is a polyorganosiloxane withdifferent degree of polymerization and chain structure. The most commonly usedsilicone oil is methyl silicone oil. Silicone oil is generally colorless (orlight yellow), tasteless, non-toxic, non-volatile liquid. Silicone oilinsoluble in water, methanol, diol and - ethoxy ethanol, with benzene, dimethylether, methyl ethyl ketone, carbon tetrachloride or kerosene miscible, slightlysoluble in acetone, dioxane, ethanol and alcohol . It has a very low vaporpre ...

Petrolatum emulsification -- 2016-11-09

Petrolatum (Vaseline) Emulsions play a rolein many areas.The authors of this series of petrolatumstudy found that Silsurf J208-612 is the most effective emulsifier. The productseems to be able to handle various ratios of petrolatum to water. Changing theratio of petrolatum to water will result in products with very differentproperties. This technology can be extended to cover many other oils, includingisomeric hydrocarbons and esters. The efficacy of other Silsurf surfactants wasstudied using th ...

PEG-8 Dimethicone Water-soluble silicone -- 2016-11-08

The molecular weight of PEG-8 dimethiconehas a great impact on the properties of the compound as well as the wettabilityand irritation. Wettability is a key, but often neglected aspect of cosmeticformulations. If you put something in the air, applied to the skin, pigmentsand any other surface, the degree of wetting of the surface is critical to theefficacy of the formulation. For products that function correctly, it isnecessary to add low concentrations of silicone wetting agents.With the same a ...

Types of Polysiloxanes -- 2016-11-07

Many types of polysiloxane, according tothe product's chemical structure and performance can be divided into threecategories:1. Silicone oil, low molecular weight linear structural polymer. Colorlessor light yellow transparent liquid with high boiling point and low freezingpoint, thermal decomposition and particularly stable against water or oxidizingagents. Can be used as hydraulic oil, high-grade lubricants, surface treatmentand demulsifier, can also be used as textiles, paper and many other m ...

The chemical structure of siloxane -- 2016-11-04

The step of building the chemical structureof the siloxane is the process of determining the length of the polymer chain, branching,and insertion of the organic group. From the point of view of its chemicalstructure, the structural groups entering the molecule are represented by theletters M (monofunctional), D (difunctional), T (trifunctional) and Q(tetrafunctional). The M functional groups are chain terminating because theyare monofunctional; the D functional group is a linear increment, makin ...

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