| abstract |
The present invention relates to a kind of organic silicon modified polyurethane elastomers and preparation method thereof, and this method includes：Use the poly- silica of carbon functional hydroxy groups sealing end as soft chain first, it polymerize in solvent-free lower body with polyisocyanates, to improve the mechanical property of elastomer, then a certain amount of organic solvent diluting is added in chain extension stage, using catalyst, the compatibility and viscosity of active balance system avoid generating macroscopical incompatibility, to ensure that reaction is smoothed out, the larger heavy polymer of viscosity is generated.This method can obtain transparency and the preferable elastomer of glossiness, simultaneously because catalyst is added in chain extension stage, so that its chain extension rate under solvent is accelerated, can greatly reduce the reaction time, improve reaction efficiency, avoid the generation of side reaction. |