Latex special for dry method dustless paper and its preparing method

Abstract

The present invention relates to latex specially for dry process dustless paper and its preparation process, and belongs to the field of special chemical. butyl acrylate, methyl acrylate, ethoxyl acrylate, styrene, acrylic acid and butyl methacrylate as monomers, are added with deionized water, emulsifier, NaHCO3 and initiator to produce branch chain connection to form copolymer. The present invention can meet the requirement of producing dustless paper and is favorable to spraying. The present invention has high fiber combining strength of paper, high dry and wet strength, simple production operation and stable product quality.

Description

technical field [0001] The invention belongs to special chemicals for papermaking, in particular to a special latex for the production of dry dust-free paper. The invention also relates to a method for preparing the latex. Background technique [0002] Special latex for dry-laid dust-free paper is a water-soluble emulsion polymer polymerized adhesive. In the dry-laid forming paper web, it plays the role of bonding fluff pulp fibers, and its quality directly affects the product. price and quality. Latex is a kind of polymer, which is composed of multiple chemical chains called monomers. The chemical characteristics of monomers will affect the strength, hardness, viscosity, absorption rate, solvent resistance and flame retardancy of latex. The common types of latex polymerization are: A ethylene and vinyl acetate copolymer (commonly known as diene latex), B styrene-butadiene copolymer, and C acrylate copolymer. Comprehensive comparison of three types of copolymers, diene la...

AI Technical Summary

Problems solved by technology

Comprehensive comparison of three types of copolymers, diene latex, because ethylene is a gas at room temperature, there are many inconveniences in transportation, use, and production processes; raw materials must be pre-emulsified in production, which increases the production steps, and the degree of monomer pre-emulsification Strict requirements, poor production operability

Styrene-butadiene copolymer can be cured quickly when the curing temperature and time are limited during the production process, but the surface of the latex is generally yellowish, which is not suitable for the production of dust-free paper

The third type of acrylic copolymer has low odor, but the cost of raw materials is relatively high. At the same time, this kind of latex is easy to stick to machinery and equipment, which is difficult to clean, which is not conducive to spraying and sizing.