CN101659842A

CN101659842A - Formaldehyde-free novel strong waterproof anti-freezing white latex

Info

Publication number: CN101659842A
Application number: CN 200810119143
Authority: CN
Inventors: 仇锦明; 仇剑锋; 仇剑梅; 焦清华
Original assignee: Beijing Yujiaming Santai Ion Science and Technology Research Institute Co Ltd
Current assignee: Beijing Yujiaming Santai Ion Science and Technology Research Institute Co Ltd
Priority date: 2008-08-28
Filing date: 2008-08-28
Publication date: 2010-03-03

Abstract

The invention provides a formaldehyde-free novel strong waterproof anti-freezing white latex. The white latex is characterized by comprising the following components in percentage by weight: 18 to 25percent of polyvinyl alcohol, 2 to 5 percent of glacial acetic acid, 0.2 to 0.5 percent of sodium hydroxide, 0.5 to 1 percent of hydrochloric acid, 10 to 15 percent of copolymerization emulsion of ethylene-polyvinyl acetate, 0.5 to 2 percent of chitin, 3 to 5 percent of glycol, and 40 to 70 percent of water. The white latex has the advantages of good waterproof and anti-freezing properties, high viscosity, difficult precipitation, no separation, the use of water as a medium, no containing of formaldehyde, urea and organic solvents, no combustion, no pollution of pungent odor, simple process, less equipment investment, low product cost, the suitability for popularization and application, and no environmental pollution. Therefore, the white latex is the novel product facilitating the protection of human health.

Description

The novel strong waterproof anti-freezing white latex that does not contain formaldehyde

One, technical field

The present invention relates to a kind of tackiness agent, particularly be a kind of formaldehyde and urea having the cohesive strength height, do the white glue with vinyl of water, good frost resistance of not using as raw material.

Two, technical background

Adopting Vinyl Acetate Copolymer in the market is the white glue with vinyl of main raw material.Because cost height, polymerization technique complexity, facility investment is big, the production cycle is long, the water tolerance frost resistance is poor, so technical state that is eliminated that faced, with No. 02109653.8 patent application is a collection of powerful white latex without Vinyl Acetate Copolymer of representative, though cost decreases, but nearly all adopt urea formadehyde etc. to have the raw material of the contaminative of strong and stimulating, the waterproof anti-freezing that has is bad, or adhesive therefor composition and auxiliary agent composition complexity, cost is still higher. and use properties and market outlook allow of no optimist improved necessity.

Three, summary of the invention

At the problem that the above-mentioned background technology exists, purpose of the present invention be exactly to develop a kind of not only without Vinyl Acetate Copolymer be major ingredient but also without pollutents such as formaldehyde and urea with low cost, manufacturing process is simple, cohesive strength is high and the white glue with vinyl of waterproof anti-freezing.

Advantage of the present invention

1. waterproof anti-freezing is good, viscosity is high, be difficult for precipitation, not stratified.

2. be that medium does not contain formaldehyde, urea and organic solvent with water, do not fire, the pollution of nonirritant stink.

3. technology is simple, facility investment is little, and product cost is low.

Four, embodiment

White glue with vinyl prescription proportioning of the present invention (weight %) and technology are as follows:

(1) prescription

Polyvinyl alcohol 18%～25%, Glacial acetic acid 2～5%, starch 2～4%, sodium hydroxide 0.2～0.5%, hydrochloric acid 0.5～1%, ethene-Vinyl Acetate Copolymer copolymer emulsion 10～15%, chitosan 0.5～2%, ethylene glycol 3～5%, water 40～70%

(2) production technique

1. polyvinyl alcohol is put into water, thereby is warmed to 90 ℃ through reactor---95 ℃., reaction obtained polyvinyl alcohol water solution in 3 to 4 hours.

2. with polyvinyl alcohol water solution and Glacial acetic acid, starch, aqueous sodium hydroxide solution, aqueous hydrochloric acid, ethene-Vinyl Acetate Copolymer copolymer emulsion, chitosan, ethylene glycol mixing and stirring in stirred pot, can not contained the novel strong waterproof anti-freezing white latex of formaldehyde

Embodiment 1.

Prepare raw material by following proportioning:

Polyvinyl alcohol 18%, Glacial acetic acid 2%, starch 2%, sodium hydroxide 0.2%, hydrochloric acid 0.5%, ethene-Vinyl Acetate Copolymer copolymer emulsion 10%, chitosan 0.5%, ethylene glycol 3%, water 40%

Production technique: the content among technological process and above-mentioned (two) is identical

Embodiment 2.

Prepare raw material by following proportioning:

Polyvinyl alcohol 25%, Glacial acetic acid 5%, starch 4%, sodium hydroxide 0.5%, hydrochloric acid 1%, ethene-Vinyl Acetate Copolymer copolymer emulsion 15%, chitosan 2%, ethylene glycol 5%, water 70%

Claims

1. freeze proof white glue with vinyl of water-resistant of not using formaldehyde. it is characterized in that containing: polyvinyl alcohol 18%～25%, Glacial acetic acid 2～5%, starch 2～4%, sodium hydroxide 0.2～0.5%, hydrochloric acid 0.5～1%, ethene-Vinyl Acetate Copolymer copolymer emulsion 10～15%, chitosan 0.5～2%, ethylene glycol 3～5%, water 40～70%.

2. according to a kind of freeze proof white glue with vinyl of water-resistant of not using formaldehyde of claim 1. it is characterized in that its blending process is:

Polyvinyl alcohol is put into water, be warmed to 90 ℃-95 ℃ through reactor., thereby reaction obtained polyvinyl alcohol water solution in 3 to 4 hours, with polyvinyl alcohol water solution and Glacial acetic acid, starch, aqueous sodium hydroxide solution, aqueous hydrochloric acid, ethene-Vinyl Acetate Copolymer copolymer emulsion, chitosan, ethylene glycol mixing and stirring in stirred pot, can not contained the novel strong waterproof anti-freezing white latex finished product of formaldehyde then.