Liquid nitrile butadiene rubber

When evaluating LNBR, the most critical parameters are Acrylonitrile (AN) content, Brookfield viscosity, and molecular weight. High AN content (typically 25-40%) enhances oil and fuel resistance, while lower viscosity grades (ranging from 5,000 to 50,000 mPa·s at 50°C) are preferred for applications requiring high flowability and ease of blending. Ensure the supplier provides a Certificate of Analysis (COA) for every batch to verify these metrics.

LNBR serves primarily as a non-migrating plasticizer and processing aid. It is widely used in the production of friction materials (brake pads), adhesives, sealants, and PVC modification. Because it co-vulcanizes with solid rubber, it prevents the 'bleeding' issues common with phthalate plasticizers, significantly improving the long-term durability and low-temperature flexibility of the final product.

As a chemical product, LNBR must comply with REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals) for the EU market and TSCA (Toxic Substances Control Act) for the US. It is essential to request a comprehensive Material Safety Data Sheet (MSDS/SDS) that aligns with the Globally Harmonized System (GHS). For food-contact applications (like gaskets), ensure the material meets FDA 21 CFR 177.2600 standards.

Request a pre-shipment sample (typically 500g - 1kg) to conduct a compatibility test with your existing formulas. Focus on the solubility and curing rate consistency. Professional suppliers on Made-in-China.com often hold ISO 9001:2015 certifications, which indicates a standardized quality management system capable of maintaining batch-to-batch uniformity.

LNBR is typically classified as non-hazardous for transport, but it is sensitive to temperature. It should be shipped in sealed steel drums (200kg) or IBC tanks. Ensure the shipping documents specify 'Keep away from direct sunlight and heat', as prolonged exposure to high temperatures can lead to viscosity changes or premature polymerization. Always verify the shelf life, which is usually 12 to 24 months under cool, dry conditions.

Utilize Trade Assurance services provided by platforms like Made-in-China.com to protect your payment until delivery is confirmed. For large-scale orders, it is highly recommended to hire a third-party inspection agency (such as SGS or Intertek) to perform a Loading Supervision and quantity verification at the factory to prevent discrepancies between the sample and the bulk cargo.

Since LNBR pricing is closely tied to raw material costs (Butadiene and Acrylonitrile), consider negotiating a formula-based pricing model for long-term contracts. Inquire about volume-based discounts; typically, ordering in Full Container Loads (FCL) can reduce unit costs by 5-10% compared to LCL due to lower handling fees and optimized freight rates.

Verify the correct HS Code (usually 4002.5900) with your local customs broker to determine the applicable import tariffs and VAT. Be aware of any anti-dumping duties that may apply to synthetic rubbers originating from specific regions. Ensure the supplier provides a Certificate of Origin (CO) to take advantage of any existing Free Trade Agreements (FTAs) between your country and China.