Water-based fluorine-containing waterproof and oil-proof agent for paper as well as preparation and application thereof

Abstract

The invention discloses a water-based fluorine-containing waterproof and oil-proof agent for paper and a preparation method of the water-based fluorine-containing waterproof and oil-proof agent. The fluorine-containing copolymer comprises the following raw materials in parts by weight: 50-80 parts of a fluorine-containing monomer, 10-20 parts of an organosilicon monomer, 1-10 parts of a methyl methacrylate monomer, 1-10 parts of a butyl methacrylate monomer, 1-10 parts of an octadecyl acrylate monomer, 1-10 parts of a diacetone acrylamide monomer, 5-25 parts of a functional monomer and 1-5 parts of other monomers; 1-5 parts of soy isoflavone glycoside, 1-3 parts of an initiator, 1-3 parts of a chain transfer agent and 1-10 parts of protonic acid, wherein the total amount of all monomers is 100 parts. Pure natural hydrophobic and oleophobic soybean isoflavone aglycone is introduced into the fluorine-containing copolymer, so that the surface free energy of the fluorine-containing copolymer on the surface of paper after the fluorine-containing copolymer is treated can be remarkably reduced, the waterproof and oil-proof performance of a traditional water-based fluorine-containing acrylate copolymer can be better improved, and meanwhile, the heat resistance and chemical stability of the fluorine-containing copolymer can be improved; and the paper has higher waterproof and oil-proof properties, tensile strength, tear resistance, breakage resistance and the like, so that the performance requirements of various types of paper can be met.

Description

technical field [0001] The invention relates to the technical field of water- and oil-repellent treatment for paper, in particular to a water-based fluorine-containing water- and oil-repellent agent for paper and a preparation method thereof. Background technique [0002] Generally speaking, the fluorine-containing oil repellent used in the paper industry is composed of hydrophobic perfluoroalkyl and hydrophilic polar groups. The perfluoroalkyl endows the paper with extremely low surface tension, while the polar group The hydrophilic group of the oil repellant is partially adsorbed or bound to the surface of the paper, and the trifluoromethyl group (-CF) of the fluorocarbon chain end group 3 ) are arranged outwards to form a hydrophobic and oleophobic film, which reduces the surface tension of the paper and prevents the paper from being wetted by oil. [0003] The fluorine-containing acrylate copolymer has good water and oil resistance, thermal stability and antifouling pro...

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Problems solved by technology

[0005] Aiming at a series of problems such as high preparation cost, low performance and poor safety of traditional fluorine-containing oil repellents on the market, this patent has invented a new type of water-based fluorine-containing waterproof and oil-proof paper prepared by a brand-new method. Compared with ordinary water-based fluorine-containing acrylic copolymer emulsion, the introduction of silicone and soy isoflavones can significantly reduce the surface free energy on the paper surface after treatment, and can better improve the traditional water-based fluorine-containing acrylic acid. Ester copolymer has waterproof and oil-proof performance, and can improve its heat resistance and chemical stability at the same time, so that the paper has higher waterproof and oil-proof, tensile strength, tear resistance and tear resistance, etc., to meet the performance needs of various paper types

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