SU439998A1 - The method of sizing cellulose-containing fibrous materials - Google Patents

Description

(54) METHOD FOR BONDING CELLULOSE CONTAINING FIBROUS MATERIALS hold about 8-40 carbon atoms. These groups include, for example, deceptyl, trideceiyl, heptadecyl, octadeceyl, eicosheyl, trikozenyl, etc. aralkyl, al.caril and alkyl, substituted with cycloalkyl with atomic carbon atoms of at least 8, for example, 4-thirds, butnphenyl , octylphenyl, dinon.chlfennl, dodecylphenyl, tridecylphenyl, pentadecylphenyl, octadecylphenyl, nonylcycloironyl, dodecylcyclobutyl, tridecylcyclopentyl, tetradecylcyclohexyl, polygidyl 11-cyclotetereteteteteteteteteteteteteteteteteteteteteleteloteteteteloyltecyl. octadecylcyclohexyl, etc., and any such alkyl, alkenyl, alkaryl, and alkylcycloalkyl soils. containing inert substituents. As inert substituents, you can give a simple ether, carboalkoxy, alkyloxy, aryloxane, aryl, C11loxy, keto (carbonyl) tert, amides, etc. Compounds with the indicated general formula can be obtained by best methods. Thus, for example, compounds in which X is an RI-O - group can be obtained by phosgeization of the corresponding alcohol RI-OH, while compounds in which X means the ground can be obtained by phosgene of the corresponding amines. The celled fiber-containing fibrous materials to be processed are pulp dmspergirovaniya in water, as well as paper, cardboard, particle board. Compounds proposed as an organic binder may be applied to the material in a known manner in the form of a solution or dispersion. An example of the most recommended method of impregnating cellulose fibers is the preparation of the dispersion of the proposed compounds in water, which is added to the fibrous mass. A dispersant is used in the preparation of a dispersion, which has anionic, cationic or non-ionic preparations, or a mixture of such Cl properties. Preferably a cationic dispersant is used. As an example of a cationic dispersant, there can be mentioned polyethyleneimine, polyalkylene-polyamide resins, cationic starch, and so on. A special type of dispersants with good adhesion to the fiber are aminochloride dimethyl distearyl or aminohydrochloride dimethyl stearyl. Used in the proposed compound method, where X is a group

R

g-- X

.No some cationic activity and therefore good adhesion to cellulosic fibers and in some cases do not require the introduction of additional adhesion-enhancing agents, for example, to coat the surface of paper, cardboard, etc. More than 0.001 wt. % based on dry fibers by adding to the pulp or applying to the surface of the paper. The upper limit is not critical, but is indicated for economic reasons. The number of compounds proposed is 0.001-5 wt. %, preferably 0.005 to 0.5 weight. % based on dry fiber. Fiber suspensions or concentrated fibers may also contain other additives common in the manufacture of paper, cardboard, fiberboard, chipboard, such as aluminum sulphate, fillers, pigments, adhesion promoters, antifoaming agents, etc. Example 1. Non-glued paper sheets weighing 65 g / m at a pH value of 8.0 are manufactured in a laboratory cylindrical paper-shedding machine from bleached sulphate pulp that has been shredded to approximately 30 ° SR. The sheets are dried and conditioned (at 20 ° C and 65% relative humidity). The sheets are then impregnated by immersing them for a few seconds in a 0.15% solution of cetyl chloroformate in benzene, after which the excess solution is removed. Impregnated sheets are dried and heat treated for 20 minutes at 120 ° C. After conditioning, the Cobb number is determined (according to standard SCAN-P 12:64). In the same way, paper is impregnated with chloroformates obtained by phosgenization of Alfol 20-f R (registered trademark for a mixture of new alcohols with a straight chain of 55% Cm, 25% Caz and 10% C24) and cholesterol, borneol, | 3- naphthol, 4-thirds. butylphenol and a-phenylethyl alcohol. The results are shown in Table. 1. Table 1. to 65 ° C chloroform-ata Aifol (Example 1) is added during the homogenization process. The dispersion is further homogenized in a high-pressure homogenizer, after which it is rapidly cooled to approximately 25 ° C. Example 3. Bleached pulp, crushed to approximately 30 ° SR at a concentration of 2%, is diluted to 0.2% of dry content. A lime solution (20% based on dry fiber) is then added, and the mixture prepared is mixed using dispersion prepared in Example 2, after which the OL% aqueous solution of polymer X150 is added as a mixture of adhesion. , 08% of a cationic vinylpiperidine polymer produced by Union Carbide). The sheets are molded and pressed, dried for 15 minutes at 100 ° C and conditioned. T a b. and c a 2 Example 4. Non-stitched paper sheets weighing approximately 70 g / m at a pH value of 8.0 are molded in a laboratory cylindrical paper-making machine from white sulphate pulp that is crushed to about 30 ° SR. The sheets are dried and conditioned (at 20 ° C and 65% relative humidity). The sheets are then impregnated by immersion for a few seconds in a solution of 0.1% substituted carbamoyl chloride in benzene, and from the solution, the solution is removed. The impregnated sheets are dried at 60 ° C for 40 minutes and heat-treated at 105 ° C for 30 minutes. After conditioning, the Cobb number is determined according to SCAN-P 12:64. Table 3 R3 CieH33 Cl8H37 R2 CigH33 1 of cyclase. Ra CisHsT Hz phenyl Hz CH3- (CH2): h-O- - (CH2) h39-42 Hz Cc, R., R3 Ci2H .., R3 CuH29 20 24 22.5 Example 5. 10 g of carbamoyl chloride, where R2 is RB CisiH37, melted at 60 ° C and in the process of homogenization, 90 g of distilled water was added over 5 minutes. The emulsion is then rapidly cooled to 25 ° C to obtain a stable diopersia. Example 6. 10 g of carbamoyl chloride, where R2 is R3 Ci8H37, and 0.5 g of distearyl dimethrene ammonium chloride together melt n during the homogenization process 89.5 g of distilled water (60 ° C) are added during 5 min. To obtain a stable dispersion, the emulsion is rapidly cooled to 25 ° C. Example 7. 10 g of carbamopropyl chloride, where R2 R: i CisH37, is melted and during the homogenization process, 90.0 g of distilled water (60 ° C) containing 0.5 g of water-soluble cobalt polyacrylamide is added over 5 minutes. To obtain a stable dispersion, the emulsion is rapidly cooled to 25 ° C. The dispersion thus obtained is used as a substance for impregnating paper in a manner similar to that described in Example 1. The results are shown in Table. 4. Table 4 Example 8. In the manufacture of porous fibreboard, 0.20% methyl stearyl carbamoyl chloride is added to the pulp based on the weight of DRY fiber. The plates are dried for 2 hours with a constant and 1 ° U rising temperature from 20 ° C to 160 ° C. The water absorption of the cardboard plates is determined in accordance with the SIS 235105 standard, with test specimens having dimensions of 100 X 100 X 10. Immerse in water for 2 hours. The normal degree of absorption fluctuates in paperboard made in industrial grade from 155 to 300%, depending on the heat treatment conditions. The water absorption by the cardboard soaked with dimeric alkyl ketene is 180%, and the water absorption by the cardboard soaked as above, is 35%. The subject of the invention and the method of sizing cellulose-containing fibrous materials by treating with an organic binder-based composition, characterized in that, in order to increase the effect of sizing of the material, as op7

ganic binder use no general formula

v-o.

. C1

X is a group Ri - O - or a group.NH .h

where RI and R2 are alkyls, aryls, aralkyls, alkaryls, cycloalkyls with the number of carbon atoms

from 8 to 40; Rs means a hydrogen atom, lower alkyl, or has the same meaning as R i

and R2.

Priority points and features. 15.07.71 under item 1 of the primer X - group Ri - O- 16.11.71 according to claim 1 with X - group R.,. x,

R, /