SU713901A1 - Paper rubberizing glue - Google Patents

Description

The invention relates to adhesives for gu (paper muting and can be used in the manufacture of all types of drawing stamps, stamps of special issues, postal blocks, labels, envelopes, adhesive tapes. Known glue for boom ij, including, wt.%: Polyvinyl alcohol, 8-4.8 Full acetate dispersion 4,0-8,0 Glycerin O, 22-O, 29 Water Others up to 100% Glue-bonded paper has a high adhesive power, does not stick at relative air humidity up to 95% and does not curl over a wide relative range air humidity, however and storage for several days, such adhesives, gelatinize, become very viscous, which creates certain difficulties in the production and storage of the glue, since to transfer the gelatinized glue to the working state, its additional mixing with high speed and capacity with using a mechanical stirrer or rebuilding glue with a pump. Using only freshly prepared glue for gumming paper is not always possible due to a number of industrial reasons. The closest in technical essence and the resulting positive effect to the invention is a glue for paper gumming, including 45-55% polyvinyl acetate dispersion, polyvinyl alcohol, antifoam, antiseptic, plasticizer and water 2. But this composition does not provide sufficient stability of the glue in the process storage and mushroom resistance. The purpose of the invention is to increase the stability during storage and the mushroom resistance of the glue. 3 The goal is achieved by the fact that the adhesive, which includes a 45-55% polyvinyl acetate dispersion, polyvinyl alcohol, an antifoam agent, an antiseptic, a plasticizer and water, contains polyvinyl alcohol with a viscosity of 4-6 cP and content of acetate group Q- 12%, higher polyoxypropylene glycol ester of higher fatty alcohols C. as onenopenseur.) Polybenzyl pyridinium chloride as an antiseptic, polymeric glycerin as an plasticizer and additionally urea in the following ratio ov, wt.%: 45--55% polyvinyl acetate dispersion 24-32 Poly1 vinyl alcohol12-16 Polyoxypropylene glycol left ester HIGH SINGLE FATTY ALCOHOL, C- {4 Cf 6 0.1-0.15 1 G1 olibenzylpy-2-chloride, O-3-O , 5 Polymerizable and glycerol-Urea3-5 WaterOther Kpi is prepared by dissolving polyvinyl alcohol powder in urea solution with antifoam - polyoxypropylene glycol ether of higher C / L-Cf fatty alcohols (propinol B-400), adding to the solution, if it is applied to the solution of the higher fatty alcohols C / L-Cf (propinol B-400), put into the solution, if it is applied to the solution of the fatty alcohols C / L-Cf (propinol B-400), put into the solution, if the efficiency of the fatty alcohol C / L-Cf (propynol B-400) is added to the solution, if it is applied to the solution. glycerin, cooling the solution from 80 ° C to 45 - 55 ° C and adding it to th polibenzilpiridiny chloride solution and popnvini acetate dispersion. The formulations of adhesives and their properties are presented in Table. one.

Polyvinyl alcohol (5/9) used in the glue has a low viscosity {4-6 cP) and at the same time contains a fairly high percentage of acetate groups (6-12), which allows to obtain highly concentrated (20-22%) and rather low viscosity solutions. polyvinyl

Table 1 alcohol and completely eliminate gelatinization glue. In tab. Figures 2 and 3 show the gelatinization time and viscosity of the glue, depending on the content of acetyl groups and the viscosity of the polyvinyl alcohol.

Combination of acetate groups in polyvinyl alcohol,%

0.5-1 1.5-2 5-6 8-10 12-14

PVA 5/9 PVA 8/14 PVA 8/14

Polybenzylpyridinium chloride (catapine) is used as an amiceptic glue. Before adding this antiseptic to the glue, it is necessary to first dissolve it in an organic solvent, fix the solution, etc., while completely eliminating the danger of the formation of small particles of antiseptic paper on the surface of the adhesive layer of gummed paper. partial precipitation from solution when added to a water-based adhesive. The glue preparation time is significantly reduced.

As follows from the tables, the route is characterized by increased stability and mushroom resistance.

The paper gummed with this glue has a high adhesive ability, does not stick together in conditions of increased relative humidity of air (9295%) and temperature (38-40 ° C) and has

Table 2

Gelatinization time

2 days after production

5 days after production

gelatinate for months

eltnization within 6 months

gelatinization for more than 1 year

Table3

4% viscosity

Viscosity of the adhesive prepared using example 1-3, spP of a solution of polyvini (glue concentration 38%) of alcohol, spZ

7OO-12OO More than 10OOOO

Glue manufacturing is impossible, since PVA is a thick mass in which lumps of insoluble powder are distributed.

slight twisting in the direction of the adhesive layer in conditions of relatively low relative humidity (3540%).

Claims (2)

Invention Formula Paper gumming glue, including 45-55% polyvinyl acetates dispersion, polyvinyl alcohol, antifoaming agent, antiseptic, plasticizer and water, characterized in that polyvinyl alcohol is used to increase stability during storage and mushroom resistance. alcohol with viscosity 4-6 cPz and acetate content of 6-12%, polyoxypropylene glycol ether of higher fatty alcohols as antifoam agent of higher fatty alcohols as antiseptic - polybenzyl pyridinium chloride, as a plasticizer - l Limerised glycerin and additionally urea in the following ratio of components, wt.%: 45-55% polyvinyl acetate dnsperis5P 34-32 Polyvinyl alcohol 12-16 Polyoxyprolylene glycol 8of higher fatty alcohols WO, 1-O, 15 713901 5 p 10 cl 8 Polybenzylp iridinium chloride, 3-O, 5 Polymerized glycerin4-6 Urea3-5 WaterOstalal Sources of information that are considered in the examination 1. GDR patent K 62634, cl, 2212, 1972 2. US patent number 3925289, 260-296, 1975