TDS (Liquid Cold-Resistant Rubber LR306)
Name: Cold-resistant liquid rubber
Model: LR306
Origin: Daxun
Appearance: Transparent, nearly colorless viscous liquid
Density: 1.06–1.08
Glass transition temperature: –40°C
Molecular weight: 90,000–110,000
Viscosity: 60,000–65,000 mPa·s
Functional groups: OH
Synthesis route: Radical
Toxicity: Non-toxic
Approved environmental standards: EU EN71-3:2019+A1:2021, EU 2002/61/EC (excluding specific azo compounds), EU ROHS 2.0, EU 2005/84/EC (no P standard), EU REACH 223 requirements, US CPSIA, US ASTM 963-16, etc.
I. Characteristics: LR306 is a liquid rubber free from phthalate-based plasticizers. It is non-toxic, transparent, water-resistant, cold-resistant, plasticizing, has a favorable texture, and exhibits excellent elasticity. All its properties surpass those of powdered or liquid nitrile rubber, yet it is more cost-effective.
II.main application ：
1. As a cold-resistant agent for PVC: LR306 can withstand temperatures down to-20°C, making it a complete substitute for DOA as a cold-resistant plasticizer in PVC formulations. The recommended dosage is identical to that of DOA; combining 10–15 parts of LR306 with 10–15 parts of DOA yields significant cold resistance without precipitation, resulting in a product that combines both elasticity and cold resistance—achievements unattainable with DOA alone.
2. Prepare a highly elastic agent for PVC.
Based on the original soft PVC formulation, adding 10–20 kg of LR306 per 100 kg of PVC while reducing the corresponding amounts of DOP, DINP, or DOTP yields a product with excellent elasticity at minimal cost increase. Its tactile properties and elasticity surpass those of powdered nitrile rubber; moreover, due to effective dispersion, it functions as a plasticizer, enabling reduced usage of other plasticizers and lower costs. In contrast, powdered nitrile rubber suffers from poor dispersion, rendering it ineffective as a plasticizer and necessitating higher amounts of other plasticizers, resulting in higher costs.
In summary, LR306 exhibits three key properties: cold resistance, elasticity, and plasticizing capability.
III.Precautions for fabrication in the laboratory
1.The LR306 must not be added to existing base materials for plate molding, as the PVC in the base material has already saturated with other plasticizers and cannot absorb LR306 further. This would compromise the performance of LR306 and cause it to adhere to the roller.
2.LR306 should not be directly added to PVC powder for mixing due to its excessively high viscosity, which makes it difficult for PVC to absorb. This will prevent LR306 from functioning properly and cause it to stick to the roller.
3.The correct procedure is as follows: first, dilute each gram of LR306 with 3–4 grams of plasticizer; then add the diluted material along with other additives to PVC and mix thoroughly until uniform. Only after LR306 is fully absorbed by the PVC powder can its functional properties be fully utilized.
IV.Specific usage instructions for production:
1.For producing cold-resistant products using the general suspension PVC calendering method at temperatures above-20°C, the LR306 packaged in boxes is the preferred choice. Each box contains 20 kg of material, comprising four bags of 5 kg each. The bags are wrapped in two layers of high-VA-content EVA film. During feeding, cut the packaging tape with scissors first, then add the EVA bags along with their chloroprene rubber coating to a high-speed mixer (using EVA pre-melted at 70°C) and mix thoroughly; do not use a internal mixer. It can be used exactly as a conventional plasticizer. Customer feedback from recent years indicates that high-VA EVA exhibits excellent compatibility with PVC, and the addition of this small amount of EVA film poses no compatibility issues during PVC plasticizing.
Please note that the amount of LR306 added to the mixer directly corresponds to the reduction in plasticizer required in the formula, thereby lowering costs and preventing excessive softening.
2. For use with paste-form PVC at temperatures above-20°C, only LR306 supplied in 20 kg barrels is permitted. Before use, dilute LR306 with plasticizer (use 4–5 kg of plasticizer per 1 kg of LR306), then transfer the diluted mixture into the mixing tank and blend it with other materials; do not add LR306 directly to the slurry. Note that the amount of plasticizer required in the formula must correspond exactly to the volume of diluted material added to the mixing tank, which helps reduce costs and prevents excessive softening.
Packaging: 20 kg per box (containing 4 bags, each 5 kg), or 20 kg per barrel; custom specifications are available upon customer request.
Tax-inclusive factory price: ***/kg. LR306 is significantly cheaper than liquid or powder nitrile but also exhibits a much lighter color and minimal odor, making it suitable for producing odorless, transparent or white products.
Manufacturer: Foshan Daxun Material Technology Co., Ltd.
Address: No.21, Jihua 5th Road, Chancheng District, Foshan City, Guangdong Province
Contact: SU SHAN
phone：18617362625
fax： 0757-83015302
