Poly-1,2-butanediol (PBG-700)

Product Overview

Poly(1,2-butanediol) (PBG-700), CAS No. 31923-86-1, is a high-performance specialty polyether material synthesized via the ring-opening polymerization of 1,2-propanediol and 1,2-butylene oxide. As a perfect drop-in replacement for the Japanese NOF UNIOL PB series, this product appears as a colorless, transparent liquid. Compared to bulk polytetramethylene ether glycol (PTMEG) and traditional polyethylene glycol (PEG) or polypropylene glycol (PPG), specialty poly(1,2-butanediol) offers superior lubricity, heat resistance, hydrolysis resistance, and excellent low-temperature flexibility due to its unique long carbon chain and side-group topology. This product is residue-free and silicone-free, making it a key functional material for specialty rubber, high-end automotive polyurethane sealing, and engineering plastic modification.

Technical Specifications

Key Advantages

Zero Silicone and Residue-Free: Offers excellent cleanliness; leaves no residue on substrate surfaces after volatilization or cleaning, ensuring no adverse effects on subsequent coating, electroplating, or bonding processes. It perfectly meets the cleanliness control requirements of high-end manufacturing workshops.

Superior Physicochemical Stability: The molecular chain segments exhibit excellent heat resistance and chemical corrosion resistance, maintaining stable performance in harsh industrial environments with alternating high and low temperatures, such as under-hood applications. It effectively resists thermo-oxidative aging and hydrolytic degradation.

Excellent Structural Compatibility: Its special polyether chain structure provides good thermodynamic compatibility with various resin systems (such as PUR, PC, and high-molecular elastomers), significantly enhancing the comprehensive mechanical properties and impact toughness of end products.

Key Applications

Automotive Headlights and PUR Reactive Polyurethane Sealants: In automotive headlight manufacturing, PBG-700 is a core prepolymer raw material for synthesizing high-performance PUR (reactive polyurethane hot melt adhesives). Sealants modified with this specialty polyether significantly improve hydrolysis resistance, resistance to severe thermal shock (expansion and contraction), and long-term flexible sealing at the bond line between the headlight lens and housing, effectively preventing fogging or cracking.

High-End Rubber and Specialty Hose Mold Release: Thanks to its excellent cleanliness and residue-free characteristics, PBG-700 is an ideal internal mold release agent for rubber hoses (e.g., automotive water pipes, air conditioning tubes). Particularly in specialty rubber industries and automotive manufacturing workshops where silicone oil is strictly restricted or prohibited, it serves as an excellent upgrade alternative to traditional silicone oil release agents.

Optical-Grade PC Resin Modification and UV Coatings: Can be used as a polymer modifier or internal mold release agent during polycarbonate (PC) injection molding, improving melt flowability during the injection of complex molds like headlight lenses without affecting optical transparency. Additionally, its derivatives are often added to surface UV-curing coatings to adjust crosslinking density, absorb stress from thermal expansion and contraction, and enhance the coating's resistance to cracking.

Base Polymer Additives and Cosmetic Film Formers: As a high-quality polyether base material, it is widely used in the modification of various engineering plastics. In daily chemical care and cosmetics, it is also commonly used as a film-forming agent and moisturizing lubricant component (INCI Name: Polybutyleneglycol / PPG-9/1 Copolymer).

Packaging & Storage

Packaging Recommendation: Packaged in 200KG galvanized iron drums, plastic drums, or 1000KG IBC totes. Custom packaging is available upon request.

Storage Conditions: This product is non-hazardous. Store in a cool, dry, and well-ventilated place. Keep containers sealed to prevent moisture ingress. Ensure compliance with green chemistry and EHS management standards.

Source Manufacturer and Proprietary Continuous Flow Technology Advantages

NINGBO INNO PHARMCHEM CO.,LTD., as a source manufacturer, possesses independently developed and designed tubular continuous flow reaction equipment, completely abandoning traditional batch reactor processes. This continuous flow microchannel technology achieves efficient removal of reaction heat and instantaneous mixing of materials, granting the product excellent batch-to-batch stability and inherent safety features. We are committed to delivering high-purity specialty polyethers to industrial standards and explicitly express our willingness to establish long-term strategic partnerships with domestic and international trading companies and end-user formulators. Samples and technical support are welcome to jointly expand the high-end materials market.