CN102433095A - Novel white latex and production method thereof - Google Patents

Abstract

The invention discloses novel white latex, which is made of polyvinyl alcohol, vinyl acetate, acrylic acid, modifier, dibutyl phthalate, corn starch, functional filler, compound emulsifier, preservative, ammonium persulfate and sodium hydroxide. The production method comprises the following steps of: adding metered water into a bottle; adding the polyvinyl alcohol while agitating; increasing temperature to 90 DEG C and keeping the temperature for 30 minutes; decreasing the temperature to 75 DEG C, adding the compound emulsifier and one third of initiator, starting to drip comonomers, controlling the temperature to be within 75 DEG C to 85 DEG C, completely dripping the comonomers within four hours and complementarily adding the ammonium persulfate in the middle; after the comonomers are completely dripped, keeping the temperature for a period of time, decreasing the temperature, adding the corn starch and controlling gelatinization temperature; keeping the temperature for half an hour, adding the functional filler and the dibutyl phthalate; decreasing the temperature and adding the sodium hydroxide to regulate the pH value to 4-4.5, adding the preservative and agitating to obtain the novel white latex. The white latex disclosed by the invention not only has the advantages of high adhesiveness, good bonding strength and good low-temperature stability, but also has the advantage of low cost.

Description

White latex paint and working method thereof

Technical field

The present invention relates to a kind of tackiness agent, especially a kind of white latex paint also relates to the working method of this kind white glue with vinyl.

Background technology

So advantages such as Vinyl Acetate Copolymer PVAC is as one of tackiness agent of environmental protection commonly used, safety, because it has the bonding strength height, curing speed is fast, and production technique is simple and easy to use are applied range.But along with the continuous rising of cost of material, the enterprise cost pressure of producing this type of tackiness agent continues to increase.The W-Gum price is relatively cheap, extensively is easy to get, but adds the intensity of measuring the low-temperature stability and the glued membrane that will influence product greatly in the polyvinyl acetate emulsion.Therefore under the situation that guarantees the white glue with vinyl performance, improve the consumption of W-Gum, reduce the consumption of PVA, can be significantly reduced to this.

Summary of the invention

Last purpose of the present invention provides a kind of not only binding property height, bonding strength is good, low-temperature stability is good, and the low white latex paint of cost.

Back of the present invention one purpose provides the working method of the last purpose white glue with vinyl of preparation.

For realizing last purpose; The technical scheme that the present invention adopted is: a kind of white latex paint; Comprise PVAC polyvinylalcohol, vinyl acetate VAC, vinylformic acid AA, properties-correcting agent, Witcizer 300 DBP, W-Gum, functional filler, compound emulsifying agent, sanitas, ammonium persulphate and sodium hydroxide NaOH, the ratio of each component is (by weight percentage):

PVAC polyvinylalcohol 1.8%-2.5%

Vinyl acetate VAC 23%-27%

Vinylformic acid AA 0.3%-0.8%

Properties-correcting agent DF-608 0.8%-1.5%

Witcizer 300 DBP 2.5%-4%

W-Gum 5%-7%

Functional filler 3%-6%

Compound emulsifying agent 0.15%-0.3%

Sanitas 0.2%-0.3%

Ammonium persulphate 0.1%-0.15%

Water 56%-58%

Sodium hydroxide NaOH 0.1%-0.2%.

Said compound emulsifying agent union base phenol polyethenoxy ether yellow amber hydrochlorate DNS-1035 and polyoxyethylene nonylphenol OP-10 form, and their proportioning is the arbitrary value between 1:2～2:1.

White glue with vinyl of the present invention is carried out modification by copolymerization with vinylformic acid AA and functional remodeling agent Dichlorodiphenyl Acetate vinyl acetate VAC; Reduce the consumption of PVAC polyvinylalcohol; Add W-Gum and functional stopping composition; The tackiness agent of processing not only initial bonding strength and bonding strength has raising in various degree, and product has good low-temperature stability.Product has higher advantage on cost performance, have vast market prospect.The present invention has improved the low-temperature stability of common white glues, has improved the cohesive strength and the sticking power of product, has obviously reduced cost.

In order to realize back one purpose, the present invention also provides a kind of working method of above-mentioned white glue with vinyl, and this method comprises the steps:

(1) in the four-hole bottle that reflux exchanger, TM and tap funnel are housed, adds measured water;

(2) add PVAC polyvinylalcohol while stirring; Slowly being warming up to 90 ℃ kept 30 minutes;

(3) equitemperature is reduced to 75 ℃ then, adds compound emulsifying agent, and 1/3 initiator also begins to drip comonomer, and temperature of reaction is controlled between 75 ℃ ~ 85 ℃, and monomer dripped in four hours, and initiator ammonium persulfate is added in the centre;

(4) drip off monomer insulation for some time, begin cooling and add W-Gum, the control gelatinization point;

(5) insulation adds functional filler, Witcizer 300 after half a hour;

(6) continue cooling and add 10% NaOH and regulate pH value 4～4.5, add sanitas and stir and get final product.

Adopt aforementioned production method, arranging raw material adds order scientifically and rationally, adopts the rational temperature time, utilizes copolyreaction can obtain white glue with vinyl of the present invention.

Embodiment

Below in conjunction with specific embodiment to white glue with vinyl of the present invention extremely working method specify, to help understanding content of the present invention.

Embodiment 1

Raw materials used prescription is:

PVAC polyvinylalcohol 2kg, vinyl acetate VAC 25 kg, vinylformic acid AA 0.5 kg, properties-correcting agent DF-608 1 kg, Witcizer 300 DBP 3 kg, W-Gum 6 kg, functional filler 5 kg, DNS-1035 0.1 kg, OP-10 0.1kg, sanitas 0.2 kg, ammonium persulphate 0.1 kg, water 56.85 kg, sodium hydroxide NaOH 0.15 kg.

Its working method is:

(1) in the four-hole bottle that reflux exchanger, TM and tap funnel are housed, adds measured water; (2) add PVAC polyvinylalcohol while stirring; Slowly being warming up to 90 ℃ kept 30 minutes; (3) equitemperature is reduced to 75 ℃ then, adds DNS-1035 and OP-10 compound emulsifying agent, and 1/3 initiator also begins to drip comonomer; Temperature of reaction is controlled between 75 ℃ ~ 85 ℃; Monomer dripped in four hours, and initiator ammonium persulfate is added in the centre, and (4) drip off monomer insulation for some time; Begin cooling and add W-Gum, the control gelatinization point; (5) insulation adds functional filler, Witcizer 300 DBP after half a hour; (6) continue cooling and adding NaOH adjusting pH value 4～4.5, the adding sanitas stirs and can go out finished product.

Embodiment 2

Raw materials used prescription is:

PVAC polyvinylalcohol 1.8kg, vinyl acetate VAC27 kg, vinylformic acid AA 0.3 kg, properties-correcting agent DF-608 0.8 kg, Witcizer 300 DBP 2.5 kg, W-Gum 5 kg, functional filler 4.05 kg, DNS-1035 0.05 kg, OP-10 emulsifying agent 0.1 kg, sanitas 0.2 kg, ammonium persulphate 0.1 kg, water 58kg, sodium hydroxide NaOH 0.1 kg.

Its working method is with embodiment 1.

Embodiment 3

Raw materials used prescription is:

PVAC polyvinylalcohol 2.5kg, vinyl acetate VAC 23 kg, vinylformic acid AA 0.8 kg, properties-correcting agent DF-608 1.5 kg, Witcizer 300 DBP 4 kg, W-Gum 7 kg, functional filler 4.25 kg, DNS-1035 0.2 kg, OP-10 emulsifying agent 0.1 kg, sanitas 0.3 kg, ammonium persulphate 0.15 kg, water 56 kg, sodium hydroxide NaOH 0.2 kg.

Its working method is with embodiment 1.

Embodiment 4

Raw materials used prescription is:

PVAC polyvinylalcohol 2kg, vinyl acetate VAC 26 kg, vinylformic acid AA 0.4 kg, properties-correcting agent DF-608 1 .4 kg, Witcizer 300 DBP 3.5 kg, W-Gum 5 kg, functional filler 3 kg, DNS-1035 0.1kg and OP-10 emulsifying agent 0.1 kg, sanitas KGS 0.25 kg, ammonium persulphate 0.1 kg, water 58 kg, sodium hydroxide NaOH 0.15 kg.

Its working method is with embodiment 1.

Embodiment 5

Raw materials used prescription is:

PVAC polyvinylalcohol 1.8kg, vinyl acetate VAC 24 kg, vinylformic acid AA 0.6 kg, properties-correcting agent DF-608 0.8 kg, Witcizer 300 DBP 3 kg, W-Gum 6 kg, functional filler 6 kg, DNS-1035 0.1 kg, OP-10 emulsifying agent 0.2 kg, sanitas 0.3 kg, ammonium persulphate 0.1 kg, water 57 kg, sodium hydroxide NaOH 0.1 kg.Its working method is with embodiment 1.

Above-mentioned DF-608 is a kind of of functional linking agent.

The above is a preferred implementation of the present invention; Certainly can not limit the present invention's interest field with this; Should be understood that; For those skilled in the art, technical scheme of the present invention is made amendment or is equal to replacement, do not break away from the protection domain of technical scheme of the present invention.

Claims (3)

1. white latex paint; It is characterized in that comprising PVAC polyvinylalcohol, vinyl acetate VAC, vinylformic acid AA, properties-correcting agent, Witcizer 300 DBP, W-Gum, functional filler, compound emulsifying agent, sanitas, ammonium persulphate and sodium hydroxide NaOH, the ratio of each component is (by weight percentage):

PVAC polyvinylalcohol 1.8%-2.5%

Vinyl acetate VAC 23%-27%

Vinylformic acid AA 0.3%-0.8%

Properties-correcting agent DF-608 0.8%-1.5%

Witcizer 300 DBP 2.5%-4%

W-Gum 5%-7%

Functional filler 3%-6%

Compound emulsifying agent 0.15%-0.3%

Sanitas 0.2%-0.3%

Ammonium persulphate 0.1%-0.15%

Water 56%-58%

Sodium hydroxide NaOH 0.1%-0.2%.

2. white latex paint according to claim 1 is characterized in that: said compound emulsifying agent union base phenol polyethenoxy ether yellow amber hydrochlorate DNS-1035 and polyoxyethylene nonylphenol OP-10 form, and their proportioning is the arbitrary value between 1:2～2:1.

3. described white latex paint working method of claim 1, this method comprises the steps:

(1) in the four-hole bottle that reflux exchanger, TM and tap funnel are housed, adds measured water;

(2) add PVAC polyvinylalcohol while stirring; Slowly being warming up to 90 ℃ kept 30 minutes;

(3) equitemperature is reduced to 75 ℃ then, adds compound emulsifying agent, and 1/3 initiator also begins to drip comonomer, and temperature of reaction is controlled between 75 ℃ ~ 85 ℃, and monomer dripped in four hours, and initiator ammonium persulfate is added in the centre;

(4) drip off monomer insulation for some time, begin cooling and add W-Gum, the control gelatinization point;

(5) insulation adds functional filler, Witcizer 300 after half a hour;

(6) continue cooling and adding NaOH adjusting pH value 4～4.5, the adding sanitas stirs and gets final product.