Description

Vinyl Acetal Polymers, Acetal Butyrals are a class of high-performance synthetic resins derived from the reaction of polyvinyl alcohol with butyraldehyde. These polymers are valued for their exceptional film-forming properties, excellent adhesion to various substrates, and high impact strength. They are essential raw materials for manufacturers in the coatings, adhesives, and specialty plastics industries seeking durable, transparent, and flexible intermediate products.

Application

• Safety Glass Interlayers: Primary component in polyvinyl butyral (PVB) films used for laminated glass in automotive windshields and architectural applications.
• Protective Coatings & Paints: Used as a binder in primers, wash primers, and metal coatings for superior adhesion and corrosion resistance.
• Adhesives & Sealants: Serves as a key resin in high-strength structural adhesives and sealants for the automotive and construction sectors.
• Printing Inks: Employed as a film-forming agent in specialty printing inks to enhance gloss, flexibility, and substrate adhesion.
• Textile & Fiber Treatment: Used for fiber sizing and as a coating to improve the handle, durability, and water resistance of textiles.
• Electronics & Membranes: Found in binders for ceramic capacitors, magnetic tapes, and as a component in specialty filtration membranes.

Basic Information

Product Name	Vinyl Acetal Polymers, Acetal Butyrals
CAS No.	70775-95-0
Molecular Formula	(C8H14O2)n (Representative)
Molecular Weight	Varies by grade and polymerization degree
Synonyms	Polyvinyl Butyral (PVB); Butyral Resin; PVB Resin; Vinyl Butyral Polymer; Poly(vinyl butyral); Butvar® (Trade Name); Mowital® (Trade Name); Saflex® (Trade Name)
EINECS	Contact for details

Quality Control

Our Vinyl Acetal Polymers are manufactured under a strict quality management system. Each batch is tested against critical parameters such as molecular weight distribution, residual acetate content, and solution viscosity to ensure batch-to-batch consistency and performance. A Certificate of Analysis (COA) detailing purity, physical properties, and performance specifications is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from heat sources and open flame. This material is hygroscopic (moisture-sensitive); ensure containers are sealed after use to prevent moisture absorption.

Specification

Item	Specification
Appearance	White to off-white granules or powder
Identification (IR)	Conforms
Assay (as PVB)	≥ 98.0%
Viscosity (10% in ethanol)	Contact for grade-specific range
Acetyl Content	< 3.0%
Hydroxyl Content	Contact for grade-specific range
Volatile Matter	< 5.0%
Ash Content	< 0.1%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.