A long-lasting hydrophilic material
A hydrophilic material and long-acting technology, which is applied in the composition and preparation of long-acting hydrophilic polymer materials, can solve the problems of material optical transparency and imaging ability damage, variegated colors, lack of adhesion, etc., and achieve excellent surface Smoothness, high optical transmittance, effect of improving mechanical strength
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Embodiment 1
[0070] Example 1 Synthesis and Preparation of Two Functional Groups, Polymerizable and / or Crosslinkable Polyurethane with Hydrophilic Properties
[0071] The first step: the monoadduct (TDI-HEA) of toluene diisocyanate and 2-hydroxyethyl acrylate (TDI-HEA), the intermediate, its synthesis process is as follows:
[0072] 1) In a clean 100mL three-necked flask, weigh 40.00g (0.2297mol) toluene diisocyanate (TDI) and 0.0669g (0.100wt%) dibutyltin dilaurate (DBTDL) successively, and then rapidly add A thermometer, a mechanical stirrer, and a 50mL constant-pressure dropping funnel connected to a drying tube were respectively installed on each bottle mouth; in addition, 0.1004g (0.150wt%) p-methoxyphenol (MEHQ) was weighed successively, 0.06694g (0.100wt%) wt%) of 2,6-di-tert-butyl-p-cresol (BHT) and 26.67g (0.2297mol) of hydroxyethyl acrylate (HEA), mixed in a beaker, fully stirred with a glass rod until MEHQ and BHT are completely Dissolve to obtain a colorless or light yellow re...
Embodiment 2
[0079] Example 2 Synthesis and preparation of two functional groups, polymerizable and / or crosslinkable polyurethane with hydrophilic properties-transforming the molecular weight of the main chain
[0080] The same steps as in Example 1 were adopted, but in the second step, PEG1000 was replaced with polyethylene glycol 600 (PEG600), and fed according to Table 1, to obtain polyethylene glycol 600 diurethane acrylate, marked as PEG600DUA.
Embodiment 3
[0081] Example 3 Synthesis and Preparation of Two Functional Groups, Polymerizable and / or Crosslinkable Polyurethane with Hydrophilic Properties-Transformation of Main Chain Molecular Weight
[0082] The exact same steps as in Example 1 were adopted, but in the second step, PEG1000 was replaced with polyethylene glycol 2000 (PEG2000), and fed according to Table 1, to obtain polyethylene glycol 2000 diurethane acrylate, marked as PEG2000DUA.
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