Non-migrating hydrophilic anti-fogging master batch for polyolefin film and preparation thereof

Abstract

The invention relates to a non-migrating hydrophilic anti-fogging master batch for polyolefin film and a preparation thereof. The preparation mainly comprises: (1) SiO2 surface hydroxylation treatment; (2) using surface hydroxylated treated SiO2 as the reaction core, allowing carboxyl-containing and hydroxyl-containing functional monomer DMPA and the surface hydroxyl groups of SiO2 to perform condensation polymerization reaction to obtain hyperbranched polyester grafted modified SiO2; (3) use one of 6C to 18C hydroxyl-containing alkyl acyl chloride, 6C to 18C saturated long-chain alkanoic acidor epsilon-caprolactone to modify the hyperbranched polyester grafted modified SiO2obtained in step (2). The invention utilizes the hyperbranched polyester grafted modified SiO2, silica anti-stickingparticles are uniformly distributed on the surface of the film, the roughness of the film surface is improved to a certain extent, and the hydrophilic group can further reduce the contact angle of water mist, thereby synergistically playing a better anti-fogging effect, so that the non-migrating anti-fogging master batch of the invention has anti-sticking performance and anti-fogging performanceat the same time. The non-migrating hydrophilic anti-fogging master batch is especially suitable for the film which can not be corona treated but needs excellent anti-fogging effect.

Description

technical field

[0001] The invention relates to the field of anti-fog masterbatch, in particular to a non-migrating hydrophilic anti-fog masterbatch for polyolefin film and its preparation. Background technique

[0002] Since polyolefin resin is a hydrophobic substance, during the use of the film, when the surface temperature reaches below the dew point, the moisture in the air will condense into dew droplets and atomize. The existence of fog droplets will cause light scattering and reflection, reduce the light transmittance of the greenhouse film, directly affect the growth of crops, and the fog droplets falling on the plants will also cause the stems and leaves to rot. Similarly, if polyolefin film is used in the field of food packaging, it will accelerate the rot and deterioration of fresh vegetables.

[0003] At present, the anti-fog technology of polyolefin film is mainly to hydrophilize the film, so that the water is evenly distributed on the surface of the film, so t...

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