Archive for 二月, 2010

Paraldehyde

星期六, 二月 27th, 2010

Paraldehyde basic information
Synonym: Zhong (b) aldehyde; three polyester aldehyde; Vice-aldehyde
Molecular Formula C6H12O3
MW 132.16
CAS No. 123-63-7
EINECS No. 204-639-8
FEMA: 4010
Paraldehyde physical and chemical properties
Appearance: colorless oily liquid.
Odor: with a pleasant spicy odor. 1% solution has a sweet flavor and the solvent-like aroma of ethyl, with the post-pyrazine-like rhyme, and a mold rot gas and a little pink fragrant flavor and fragrant jam tune.
Density: relative density (water = 1) 0.99; the relative density (Air = 1) 4.55
Melting point? : 12.6 ℃
Boiling point: 124.0 ℃
Flash point: 27 ℃
Refractive index :1.4035-1.4055
Vapor Pressure: 1.33kPa/24 ℃
Solubility: with alcohol, chloroform, ether and oils, soluble in 8 copies of 25 ℃ boiling water, or 17.
With dilute hydrochloric acid a total of heat or by adding a few drops of sulfuric acid that is broken down into acetaldehyde.
Paraldehyde use
Paraldehyde easily broken down into acetaldehyde, acetaldehyde can be used as a stable form of acetaldehyde to facilitate the storage and transportation.
Used as a solvent, used in organic synthesis, rubber accelerator and antioxidant.
For pesticides, Teucrium, pharmaceutical, paint industries.

Petroleum Resin

星期六, 二月 27th, 2010

The use of oil by-product of cracking olefins for polymerization of olefins or ring or with aldehydes, aromatics, terpenes and other copolymer resins made of the general nature of the material. With acid price and good miscibility, low melting point, water resistance, and resistance to chemicals, ethanol, and so on. Soluble in aliphatic hydrocarbons and chlorinated hydrocarbons, insoluble in lower alcohols and ketones. Mainly used in paint industry, such as oil and resin emulsion used to enhance the synthesis of latex paint, light-colored petroleum resin for the manufacture of oil-based varnish to improve the gloss and adhesion. Is also used in rubber industry, with a low softening point resin as a plasticizer, a resin with high softening point to improve the hardness of synthetic rubber. Also used for preparation of hot melt adhesive, and traffic signs paint, printing ink and paper hydrophobic agent.

Polyamide resin

星期六, 二月 27th, 2010

Polyamide resin

Polyamide resin

Polyamide Resin Properties: with tenacity, flexibility, combining strong.
Polyamide resin Uses: Widely used in printing ink, hot melt adhesives.
Polyamide resin, is an excellent use of a wide range of chemical raw materials, by their very nature can be divided into two main categories: non-reactive or neutral and reactive polyamide polyamide. Neutral polyamide mainly used to produce inks, adhesives and coatings of heat sealing, reactive polyamide for epoxy curing agent, and for thermosetting surface coatings, adhesives, lining materials and tank seal, Molded resin. Neutral dimer acid polyamide resins such as polyethylene matrix adhesion is good, especially suitable for packaging in polyethylene film surface, the metal foil composite plastic film laminated film printing; neutral polyamide resin inks are formulated gloss, adhesion performance, alcohol dilution of good, low gel, quick-drying, odor. Dimer acid-base heat sealing resin, widely used in shoe-making, canning, packaging and book binding; for packers side seam sealing; for frozen apples, oranges and other fruit juice containers a new structure of the bond. Heat sealing of polyamide binder, with their resistance to dry cleaning, resistant to strong detergents, bleach and laundry room and the family high-temperature washing conditions, easy to use fabric adhesive joint strength materials used for strong adhesive joint; due to have the necessary cohesive strength and excellent moisture resistance of cable used for heat-shrinkable sleeve. Neutral polyamide resin, other uses include preparation of thixotropic coatings, civilian water-based glue, fabric anti-static agent, transparent candles and detergent. Reactive polyamide resin used for further reaction of epoxy resin curing agent, resulting in a wide range of cross-linked thermosetting resins. When used as a curing agent with a Pair arbitrary large, non-toxic, can be cured at room temperature, as well as soft, not brittle, etc., can epoxy resin has excellent adhesion, flexural, toughness, chemical resistance , anti-wet and the surface smooth nature. Dimer acid-amino acid amine epoxy resin, the biggest use is a binder, surface coating and potting, molded resin. Good wetting properties of the binder, adhesive strength, which increased plasticity is good, than by amine curing of epoxy capability greater impact. This binder can be used for the side seam metal binder, as well as plastics, auto body welding agents and caulking materials, but also for metal — metal stick together the structure of binder. Dimer acid-based polyamide curing of epoxy resin, with soft, anti-chemicals, salt corrosion, anti-impact and high-gloss and other excellent properties, widely used as surface coatings.