Water-dispersed adhesive composition

 

(57) Abstract:

The invention relates to adhesive compositions based on water dispersion of acrylic copolymer and can be used for gluing paper, plywood, veneer, wood, cardboard between them or in any combination, as well as their adhesion to different substrates: concrete, stucco, wood (particleboard, fiberboard, plywood and painted. Describes a water-dispersible adhesive composition including a film-forming water dispersion of acrylic copolymer thickener, characterized in that it additionally contains antifreeze - ethylene glycol or diethylene glycol or di(2-ethylhexyl)-sebacina, additive coalescent - ethyl cellosolve, biocidal additive solution derivatives isothiazolinone: 1,2-(hydroxy)-5,8,11-dioxadodecane, 1,3-bis(hydroxy-methyl)-urea, 1,6-dihydroxy-2,5 deoxyhexose “Parmetol And is 26” and the water, and as a film-forming composition contains 40-60%-percent aqueous dispersion of a copolymer of butyl acrylate, methyl methacrylate and methacrylic acid with a mass ratio of monomers 35-55 : 40-60 : 0.5 to 3, respectively, as a thickening agent comprises acrylic-urethane associative thickener type “Polyfab TR-117 or sodium salt carbox the Ira rosin in an amount up to 20 wt.%, and 25% aqueous ammonia solution in an amount up to 0.5 wt.%. The technical result - the creation of adhesive compositions with a wide range of applications with high adhesive strength, high resistance to water and frost. 2 C.p. f-crystals, 2 PL.

The invention relates to adhesive compositions based on water dispersion of acrylic copolymer and can be used for gluing paper, plywood, veneer, wood, cardboard between them or in any combination, as well as their adhesion to different substrates: concrete, stucco, wood (particleboard, fiberboard, plywood and painted.

Known composition according to patent RU 2012581 C1 from 01.07.91, for gluing PVC decoration materials containing

46% aqueous dispersion

copolymer

of methyl methacrylate,

of butyl acrylate and methacrylic

acid 82,8-95,6

Dibutil or dioctylphthalate 3,0-16,0

Product interaction

Recoletos

copolymer of methacrylic

acid and

of butyl acrylate with diethylamino

or

monoethanolamine 0,1-1,0

The product of polymerization

oxides

this is undisolved 0,05-0,20

10-25% aqueous

the alkali solution 0,2-0,7

At comparable scope and high frost resistance described adhesive composition is quite difficult to produce due to the presence in its structure a large number of complex additives and undesirable presence of teorama.

Also known water-dispersed adhesive composition for bonding paper, cardboard, wood, paper laminates and PVC plastic on the surface of wood and paper-based on patent RU 2159263 C2 from 11.03.1998, containing the following components:

a 50% aqueous dispersion

copolymer of butyl acrylate,

styrene and methacrylic acid 89,0-of 92.7

7% aqueous solution

polyacrylamide 6,0-8,6

Urea 1-3

Formalin 0,1-1,0

At the close area of application of this composition has poor characteristics in terms of water resistance, in addition, it contains a toxic styrene monomer.

Closest to the proposed invention the technical essence is a water-dispersible adhesive composition for bonding PVC finishing materials.with. The USSR №638610 from 26.12.1975, This tx2">a 50% aqueous dispersion

copolymer

of butyl acrylate,

vinyl acetate,

methacrylic acid

with the mass ratio

monomers

accordingly, 84:15:1

(foaming agent) 50-60

The ammonium Caseinate or solution

carboxymethylcellulose 6-8

(thickener)

70% solution of rosin

in toluene (adhesive additive) 5-6

10% solution of alkali in the water

(pH regulator) 2,7-3,3

Chalk or Colin (filler) 22-36

The disadvantages of the specified composition is a limited range of application. In addition, this composition has poor characteristics in terms of water resistance, frost resistance and adhesive strength.

Object of the present invention is to provide adhesive compositions with a wide range of applications with high adhesive strength, high resistance to water and frost.

The mentioned technical problem is solved due to the fact that the water-dispersed adhesive composition including a film-forming water dispersion of acrylic copolymer thickener, optionally soda is cellosolve, biocidal additive solution derivatives isothiazolinone: 1,2-(hydroxy)-5,8,11-dioxadodecane, 1,3-bis(hydroxy-methyl)-urea, 1,6-dihydroxy-2,5 deoxyhexose “Parmetol And is 26” and the water, and as a film-forming composition contains 40 to 60% aqueous dispersion of a copolymer of butyl acrylate, methyl methacrylate and methacrylic acid with a mass ratio of monomers 35-55:40-60:0.5 to 3, respectively, as a thickening agent comprises acrylic-urethane associative thickener type “Polyfab TR-117, or the sodium salt of carboxy-methylcellulose in the following ratio, wt.%:

40-60% aqueous dispersion

copolymer of butyl acrylate, methyl methacrylate

and methacrylic acid with a mass ratio

monomers 35-55:40-60:0,5-3 25-40

Acrylic-urethane thickener

associative type Polyfab TR-117"

or sodium salt

carboxymethylcellulose 0,5-4,0

The solution derivatives isothiazolinone:

1,2-(hydroxy)-5,8,11-dioxadodecane,

1,3-bis(hydroxymethyl) urea, 1,6

dihydroxy-2,5 deoxyhexose

"Parmetol A26" 0,05-0,5

Ethylene glycol or diethylene glycol,

or di-(2-atilgan which may contain an ether solution of rosin in an amount up to 20 wt.%, and 25% aqueous ammonia solution in an amount up to 0.5 wt.%.

Used in the composition of 40-60% aqueous emulsion of a copolymer of butyl acrylate (BA), methyl methacrylate (MMA) and methacrylic acid (MAC) with a mass ratio of monomers 35-55:40-60:0.5 to 3, respectively, is issued by the industry under the brand name “Deacon” TU-2241-039-07507802-2001.

40-60% aqueous emulsion of acrylic copolymer (copolymer BA, MMA and MACS) are obtained by the emulsion polymerization of butyl acrylate, methyl methacrylate and methacrylic acid in the presence of a water-soluble polymerization initiator and an anionic emulsifier.

Acrylic adhesive dispersion is based adhesive that provides strength and adhesive characteristics of the adhesive joint.

As a thickener, with the aim of improving the rheological properties, the composition comprises sodium carboxymethyl cellulose (Na-CMC) (TU 6-55-40-90) or acrylic-urethane associative thickener type “Polyfab TR-117” company “Union Carbide”, in the form of water-soluble polymers. The latter includes acetaldehyde, 0.001%, 0.002% ethyl acrylate, polymetalic 40% water and 60%. “Polyfab TR-117” is a viscous whitish liquid (health certificate for Polyphobe TR-was the development of fungi and a variety of microorganisms especially glue, which contains the most biologically vulnerable molecules of cellulose thickener. To prevent bioorganica glue as biocidal additives used solution derivatives isothiazolinone, consisting of:

1,2-hydroxy-5,8,11-dioxadodecane,

1,3-bis(hydroxymethyl) urea,

1,6-dihydroxy-2,5 deoxyhexose,

manufactured under the brand name Parmetol A26 firm “Shulke@Mayr” (hygienic conclusion on products).

To increase the frost resistance is introduced ethylene glycol (GOST 19710-83) or diethylene glycol (GOST 8728-87), or di(2-ethylhexyl)-sebacina (GOST 10136-77) and ethyl cellosolve (GOST 8313-88).

25% aqueous ammonia solution (GOST 3760-79) provides the necessary pH value of the adhesive, which can adjust the viscosity of the system.

To improve the strength characteristics, reducing the initial setting time and reduce the drying time is introduced a solution of the ester of rosin (resin REC) (TU 13-0281078-7889). Resin rack is a glycerol ester of abietic acid, dissolved in 50% toluene solution.

Glue is a homogeneous lump-free and mechanical primes is prepared as follows.

First, in the reactor with cold water load when operating the stirrer sodium salt of carboxymethylcellulose, then raise the temperature in the reactor to 50, 60°C. In the process of dissolution of Na-CMC type encoder pH. Then reduce the temperature to 20-30°C and injected alternately with the constant work of agitators calculated the number of biocidal additives, antifreeze, coalescent, an aqueous solution of a thickener, a water dispersion of acrylic copolymer, the resin rack. The components are mixed to produce a homogeneous mass. The total cooking time of the adhesive is 2-3 hours

Glue in laboratory conditions was prepared and tested throughout the range of each component. For comparison, similar tests were carried out for the composition of the prototype.

Specific examples of compounds with different content components in the adhesive in comparison with the prototype are listed in table 1.

The test results of samples of the adhesive are presented in table 2.

As follows from the table data, the adhesive composition according to the invention is superior to known, taken as a prototype, in terms of adhesive strength, water resistance of the adhesive joint, frost resistance, i.e., offer ochotny indicators are samples of glue, having a composition included in the claimed range.

The compositions of examples 1, 2, 3, 14, 15, 16 from beyond the quantitative values of components have worse characteristics than the industrial glue samples, examples 1, 2, 3 find a lower strength, and examples 3, 15, 16 along with this do not pass the test for frost resistance due to the inadequate number of antifreeze.

Created the adhesive composition in a wide range of use is non-toxic, fire, prepared for the simple technology on standard equipment, easy to use and maintains its characteristics during storage.

1. Water-dispersed adhesive composition including a film-forming water dispersion of acrylic copolymer thickener, characterized in that it additionally contains antifreeze - ethylene glycol, or diethylene glycol or di(2-ethylhexyl)-sebacina, additive coalescent - ethyl cellosolve, biocidal additive solution derivatives isothiazolinone: 1,2-(hydroxy)-5,8,11-dioxadodecane, 1,3-bis(hydroxy-methyl)-urea, 1,6-dihydroxy-2,5 deoxyhexose “Parmetol And is 26” and the water, and as a film-forming composizioni ratio of monomers 35-55 : 40-60 : 0.5 to 3, respectively, as a thickener contains acrylourethane associative thickener type “Polyfab TR-117, or the sodium salt of carboxymethyl cellulose in the following ratio, wt.%:

Ethylene glycol, or diethylene glycol, or

di(2-ethylhexyl)-sebacina 2-5

The Ethyl Cellosolve 0,8-3,1

The solution derivatives isothiazolinone:

1,2-(hydroxy)-5,8,11-dioxadodecane,

1,3-bis(hydroxymethyl)-

urea, 1,6-dihydroxy-2,5

deoxyhexose "Parmetol A26" 0,05-0,5

40-60% aqueous dispersion of a copolymer

of butyl acrylate, methyl methacrylate and

methacrylic acid with mass

the ratio of monomers

35-55 : 40-60 : 0,5-3 25-40

Acrylourethane thickener

associative type Polyfab

TR-117 or sodium salt

carboxymethylcellulose 0,5-4,0

Water The Rest

2. Water-dispersed adhesive composition under item 1, characterized in that it further contains a solution of ester of rosin (resin REC) in an amount up to 20 wt.%.

3. Water-dispersed adhesive composition on PP.1 and 2, characterized in that it additionally contains 25% water is

 

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