9003-33-2 Usage
Description
Poly(vinyl formal), also known as poly(vinyl acetal), is a polymer derived from the reaction of poly(vinyl alcohol) with formaldehyde. It is known for its excellent adhesive properties, heat resistance, and toughness, making it a versatile material for various applications.
Uses
Used in Wire and Cable Industry:
Poly(vinyl formal) is used as a wire coating for its adhesive and heat-resistant properties, providing protection and insulation to electrical wires.
Used in Surface Coating Industry:
Poly(vinyl formal) is used as a surface coating to provide a tough, durable, and heat-resistant finish for various substrates, including metal, plastic, and wood.
Used in Adhesive Industry:
Poly(vinyl formal) is used as an adhesive due to its strong bonding capabilities and resistance to heat and moisture, making it suitable for various applications, such as automotive, construction, and packaging.
Used in Membrane Technology:
Poly(vinyl formal) is used in the anomalous sorption and pervaporation of aqueous organic mixtures by poly(vinyl acetal) membranes, demonstrating its potential in separation processes and environmental applications.
Preparation
Poly(vinyl formal) was developed by General Electric as a wire coating and the early process involved direct reaction of a mixture of poly(vinyl acetate), glacial acetic acid, formalin and concentrated sulfuric acid at 70°C. After the desired degree of polymerization is obtained, ammonium hydroxide is added to bring the pH to about 9-10. The reaction mixture is poured into water to precipitate the poly(vinyl formal). Poly(vinyl formais) have also been used as fibers.
Check Digit Verification of cas no
The CAS Registry Mumber 9003-33-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 9,0,0 and 3 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 9003-33:
(6*9)+(5*0)+(4*0)+(3*3)+(2*3)+(1*3)=72
72 % 10 = 2
So 9003-33-2 is a valid CAS Registry Number.
InChI:InChI=1/C2H4O.CH2O/c1-2-3;1-2/h2-3H,1H2;1H2