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A novel formaldehyde-free waterproof white latex and its preparation method

A new type of white latex technology, applied in the direction of adhesive types, unsaturated alcohol copolymer adhesives, non-polymer adhesive additives, etc., can solve the problem of poor weather resistance and water resistance of white latex, affecting the adhesive Normal work, viscosity reduction of adhesives, etc., to achieve the effect of good waterproofness, easy promotion and application, and improvement of waterproof performance

Active Publication Date: 2021-11-23
LINHAI CHUNZHU ADHESIVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional white latex mostly uses vinyl acetate and polyvinyl alcohol as the main raw materials. The polymerization process is complex and the production cycle is long (8-13 hours). The traditional white latex polymerized has poor weather resistance and water resistance and high temperature When the viscosity of the adhesive decreases, rheology occurs, and when soaked in water, the adhesive is prone to cracking, which affects the normal work of the adhesive

Method used

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  • A novel formaldehyde-free waterproof white latex and its preparation method
  • A novel formaldehyde-free waterproof white latex and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Embodiment 1: A kind of novel formaldehyde-free waterproof white latex, preparation method is as follows, in reaction vessel, add 54.6kg deionized water, keep stirring, heat up and add 13.6kg heavy calcium carbonate, 7.6kg polyvinyl alcohol successively, temperature is warmed up to Keep warm at 90°C for 1 hour, add 6kg of cornstarch and 6kg of deionized water after cooling down to 72°C, heat up to 82°C for gelatinization for 10 minutes, then add 12kg of styrene-acrylic emulsion after cooling down to 60°C, the styrene-acrylic emulsion is silicone modified Non-toxic styrene-acrylic emulsion. Cool down to 50°C and stir for 30 minutes to obtain a new formaldehyde-free waterproof white latex.

Embodiment 2

[0024] Embodiment 2: A kind of novel formaldehyde-free waterproof white latex, preparation method is as follows, add 48kg deionized water in reaction container, keep stirring, add 10kg heavy calcium carbonate, 5kg polyvinyl alcohol successively in temperature rise, the degree of polymerization of polyvinyl alcohol At 1700-2400, the degree of alcoholysis is 50-99%. After the temperature is raised to 90°C, it is kept for 1 hour. After the temperature is lowered to 72°C, 2kg of cornstarch and 2kg of deionized water are added, and the temperature is raised to 82°C for gelatinization for 10 minutes. After the temperature is lowered to 60°C, 8kg of styrene-acrylic emulsion is added. The styrene-acrylic emulsion is Organic fluorine modified styrene-acrylic emulsion. Cool down to 50°C and stir for 30 minutes to obtain a new formaldehyde-free waterproof white latex.

Embodiment 3

[0025] Embodiment 3: A kind of novel formaldehyde-free waterproof white latex, preparation method is as follows, add 45kg deionized water in reaction container, keep stirring, add 12kg heavy calcium carbonate, 6kg polyvinyl alcohol successively in temperature rise, the degree of polymerization of polyvinyl alcohol At 1700-2400, the degree of alcoholysis is 50-99%. After the temperature is raised to 90°C, it is kept for 1 hour. After the temperature is lowered to 72°C, 5kg of cornstarch and 5kg of deionized water are added, and the temperature is raised to 82°C for gelatinization for 10 minutes. After the temperature is lowered to 60°C, 10kg of styrene-acrylic emulsion is added. The styrene-acrylic emulsion is Epoxy resin modified styrene-acrylic emulsion. Cool down to 50°C and stir for 30 minutes to obtain a new formaldehyde-free waterproof white latex.

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Abstract

The invention belongs to the technical field of adhesives, and discloses a novel formaldehyde-free waterproof white latex and a preparation method thereof. The raw materials of the novel formaldehyde-free waterproof white latex include the following components: 5-10 parts of polyvinyl alcohol; 2-8 parts of corn starch; benzene 8‑15 parts of acrylic emulsion; 50‑65 parts of deionized water; 10‑15 parts of heavy calcium carbonate. The invention has the following advantages: the novel formaldehyde-free waterproof white latex prepared by using polyvinyl alcohol, corn starch, and styrene-acrylic emulsion together with heavy calcium carbonate as a filler has high bonding strength, good water resistance, and good physical and chemical properties. Stable effect, strong practicability. The preparation method of the novel formaldehyde-free waterproof white latex is simple, the production cycle is short, the preparation is easy, the production cost is low, and it is convenient for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of adhesives, in particular to a novel formaldehyde-free waterproof white latex and a preparation method thereof. Background technique [0002] Adhesive bonding (bonding, bonding, cementation, gluing) refers to the technology of connecting the surfaces of homogeneous or heterogeneous objects with adhesives. It has the characteristics of continuous stress distribution, light weight, or sealing, and low temperature in most processes. Gluing is especially suitable for the connection of different materials, different thicknesses, ultra-thin specifications and complex components. Gluing is the fastest growing in modern times and has a wide range of application industries. [0003] White latex is one of the most widely used and most used water-soluble adhesives. It can be cured at room temperature, cured quickly, and has high bonding strength. Most of the traditional white latex uses vinyl acetate and polyvinyl a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J125/14C09J129/04C09J103/02C09J11/04C09J11/06
CPCC08K2003/265C08L2205/03C09J11/04C09J11/06C09J125/14C08L29/04C08L3/02C08K3/26C08K5/098C08K5/521
Inventor 徐西鹏
Owner LINHAI CHUNZHU ADHESIVE
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