PU is a block copolymer composed of isocyanate, polyol and chain extender.
Since bio-based materials emphasize sustainable raw materials, the preparation of bio-based PU is easier to understand. The common method is to introduce bio-based monomers or intermediates in the polymerization process, such as bio-based isocyanates, bio-based polyols, and bio-based BDO. (Butylene Glycol), Bio-based PDO (Propylene Glycol), etc.
Bio-PU uses biomass (including straw and other agricultural and forestry crops) as raw materials, and uses biological fermentation technology to produce lysine isocyanate, replacing aromatic and aliphatic isocyanates; using biological fermentation technology to produce bio-based polyols, etc., instead of petrochemical materials. The final production of bio-based polyurethane meets the requirements of environmental protection and low carbon, and has excellent performance.
Bio-PU Environmental Benefits
Bio-based PU is extracted from renewable resources, subverting the infinite possibilities of the PU material industry, introducing sustainable concepts from source material design, and promoting low-carbon manufacturing and green consumption.
Taking a typical bio-based polyol on the market as an example, the environmental benefits of replacing petroleum-based products are significant, and the carbon reduction target can be achieved by about 40%. Bio-PU unlocks polyurethane green high-performance application scenarios.
As a material with excellent comprehensive properties, Bio-PU has a wide range of downstream products and has been used in clothing, shoes and hats (synthetic leather, sole components), luggage (synthetic leather), construction (paints, thermal insulation materials), automobiles (coatings, components) , adhesives) and other high-performance scenarios to protect the quality of healthy life and unlock a green future.
Bio-PU, which uses polylactic acid polyol as raw material, has been used in coatings, slurries, adhesives, sealants, foams, elastomers, etc., and can improve the gloss, wear resistance, hardness, tensile strength and other properties of materials , and endows "green" with mid-to-high-end brands such as trendy home furnishing, new energy vehicles, and ecological outdoor equipment.
Polylactic acid polyol can also synthesize UV resin, which is used in UV glue, UV coating, UV ink, 3D printing and other fields.
3D printing manufacturers have launched bio-based PLA light-curing 3D printing resins (UV resins) to promote photosensitive 3D printing into the era of environmental protection. PLA bio-based photosensitive resin is synthesized based on PLA polyol, which has good toughness, low odor and smooth surface of printed parts. It has passed the EN71-3 toy certification standard, making it safer to use; good toughness, can be drilled without cracking; low odor, more comfortable to use.
