SU979562A1 - Paper coating composition - Google Patents

Description

(54J PAPER COATING COMPOSITION. The invention relates to the pulp and paper industry, in particular, to the production of paper substrate used in the manufacture of artificial leather from pliwini lichloride pastes by a portable method. It is known anti-adhesive coating for polyvinyl chloride pastes, which includes hydrophilic polyhydrophilic polymers, which includes a hydrophilic polyhydric. , sodium alkyl silicate, wetting agent and boric acid} However, by applying this coating to primed paper, the glossy surface of the artificial leather is obtained from Livinil chloride, which does not imitate the surface of natural skin. Applying this coating on non-primed paper provides mattness, but does not provide sufficient anti-adhesive properties due to the failure of the composition in the thickness of the paper. Also known is the composition of the coating, proposed to prevent adhesion and applied to the aluminum floor. , cellophane and other materials, including paper for offset printing. This composition is an aqueous dispersion of o4HmiBHHoro solid filler, a binder based on ethylenically saturated monomer Omer and Cathane stabilizer. As cationic stabilizers, it was proposed to use various derivatives of amines, possessing the properties of surfactants, in an amount of 0.5-3% by weight of the polymer, it is recommended to give a polymer for paper in a ratio of 10-25 wt.h. its 100 ma.ch. filler 2. However, the technological application of this composition is complicated by an additional operation, processing the liquid coating layer to gelatinize it with gaseous gas, which requires special equipment and special organization of work in harmless conditions. The closest to the proposed technical essence is the paper coating composition, including kaolin, casein, styrene butadiene latex, sodium hexametaphosphate, alkali and terpineol. In addition, the known coating contains sodium carboxymethyl cellulose and calcium stearate. Known, the composition contains these components in the following ratio, wt.%: 83,0-86,0 Pigments Carboxylphenol styrene butadiene 11,0-14,0 latex Casein 0.5-1.5 Sodium salt of carboxymethylcellulose, 5-1.5 0 , 3-0.5 Disperser 0.1-0.2 Alkali 0.5-1.0 Calcium stearate 0.1-0.3 Antifoam An alkaline sz is used as alkali. However, the known composition completely or to a greater extent (by 30-60% of the area di) sticks to the front surface of the molded PVC film, i.e. it does not have antiadhesion properties in relation to polyvinyl chloride, which leads to product rejection and does not provide the possibility of using this coating in the manufacture of anti-adhesive scouring paper to form polyvinyl chloride film materials. The purpose of the invention is the possibility of using the composition in the manufacture of an anti-adhesive substrate paper for lorming polyvinyl chloride film materials. The goal is achieved by those. that the paper coating composition, including kaolin, casein, styrene butadiene latex, sodium hexametaphosphate, alkali and patience, contains these components in the following amounts, wt.%: Kaolin 50.9-60.2 Casein 14.8-18.7 Butadiene styrene-ny latex 22,2-28,0 Sodium hexametaphosphate 0,28-0,81 Alkali 0,19-1,19 Terpineol 1,33-1,65 As the alkali composition contains a mixture of caustic soda and ammonium hydroxide. An increase in the content of bonding (casein and latex) while reducing the content of the filler (kaolin) is based on the experimentally established fact that anti-adhesive properties are observed with respect to polyvinyl chloride nJtacTtizol in coated with binders of casein and butadiene styrene latex. An increase in the content of binders provides coating of the filler, an increase in the cohesive properties of the coating, an increase in the content of binders on the outer surface of the coating and, ultimately, an improvement in its anti-adhesion properties upon receipt of a matte surface texture. Extending the C1 content of sodium hexametaphosphate dispersant allows one to control the nature of the surface of the coating, to ensure uniformity of the matte coating. In connection with the increase in the content of the latex in order to avoid an enhanced pyoobrandant, the content of penosaccharide-terpineol in the composition is increased. The increase in alkali compared to the prototype is associated with exclusion from the composition. coating of sodium salt of carboxymethylcellulose reagent, giving an alkaline reaction. Local concentrated addition to alkaline (pH 7.5–8.5) suspension of kaolin with additional amounts of caustic alkali causes sharp local coagulation of the dispersed phase. Therefore, in order to impart stability to the dispersive coating system and ensure its anti-adhesive properties, a weak base that does not have a mineral residue, for example, ammonium hydroxide, is added to it. P. r i me R 1 (prototype). The composition is prepared according to a known recipe, containing the components in the amounts shown in Table 1. Examples 2-5. The kaolin dispersion is prepared by adding to the calculated amount of water the required amount of kaolin, caustic soda, and sodium hexametaphosphate. The contents are mixed for 10-15 minutes. Casein glue is added and mixed for 10-15 minutes. SCS 65-GP butadiene styrene latex and terpineol are added. The contents are mixed for 5-10 minutes. Then, with stirring, ammonium hydroxide is added to pH 9-10. The method of preparing the coating composition in examples 3-5 is the same as example 2. In example 5, instead of the SCS 65-GP latex, a carboxylated styrene-butadiene latex with a methacrylic acid content of 2.5-5% 65/3 was used. To simplify the composition of the proposed coating, it is excluded from comparison, p. prototype sodium salt of carboxymethylcellulose and calcium stearate (examples 2-5). The ratio of components (in wt.%) In examples 2-5 are also given in table. one.

Table 1

Hexametaphosphate

on three

Sodium salt of carboxymethylcellulose

Calcium stearate The surface compositions obtained according to examples 1-5 are applied to the base paper of the cable type (TU 13-bl-512-81J. Then popivinyl chloride plastisol for artificial leather is applied to the nano-CNG coating and the adhesion of the coatings to polyvinyl chloride is determined. B Table 2 shows the average values of the adhesion measurement results according to examples 1-5 (in g / cm). In all the above options, the composition of the coatings and the coating according to the prototype (example 1) are completely or more (30-60% area) separates from the base paper and adheres to polyvinyl chloride Table. EXAMPLE LIEL NO. TYPE: Coating does not stick out from polyvinyl chloride10,7 7,22 6,14 6,83 As can be seen from Table 2, the coating made of the proposed composition has an adhesion force (6.140 , 28

0.51 0.61 0.81 10.7 g / cm), which provides an effective separation of the PVC film from the substrate paper. In all cases, the use of the proposed adhesion coating 6.1410.7 g / cm was obtained on the matte surface of polyvinyl chloride artificial leather, on which there are no traces of the coating. The formula of the invention 1. The composition of the paper coating, including kaolin, casein, styrene butadiene latex, hexametaphosphate: sodium, alkali and terpineol, characterized in that, in order to be able to use it when preparing anti-adhesive paper. Substrates for forming polyvinyl chloride film materials, the composition contains these components in the following amounts, wt.%: Kaolin 50.9-60.2 Casein 14.8-18.7 Butadienestyrene22, 2-28% latex He, xametaphosphate 0.28-0.81 sodium 0.19-1, 19 Alkaline 1.33-1.65 Terpineol 2. The composition according to Claim 1, is also distinguished by the fact that. as alkali it contains a mixture of caustic .nitra and ammonium hydroxide. 7 Sources of information taken | into account in the examination 1. USSR author's certificate No. 751872, cl. D 21 H 1/38, 1978. 9795628 cl. 427-341, 1961. 532674, cl. D 21 H 1/22, 1973 (.prototype). 2, US Patent No. 2973285, 3. USSR Copyright Certificate

Claims (2)

Claim In all the above options, the composition of the coatings and the coating according to the prototype (example 1) are completely or. to a greater extent (30-60% of the area) is separated from the base paper and adheres to the polyvinyl chloride film. Table 2 PRI me R, No. ¹ (prototype) | 2 B. eleven eleven eleven 1 L "I eleven 1 ----------------------- 1 eleven 1 w 1 eleven eleven eleven Coating does not stick to poly vinyl chloride 10.7 1 1 00 1 * 1 K) 1 1 6.14 6.83 "ABOUT As can be seen from the table. 2, a coating made of the proposed composition has an adhesion force (6.14 - 1. The composition of the coating for paper, including kaolin, casein, butadiene styrene latex, sodium hexametaphosphate • alkali and terpineol, characterized in that, in order to be able to use it in the manufacture of release paper - 50 substrates for molding polyvinyl chloride film materials, composition ’contains these components in the following amounts, wt.%: Kaolin '50, 9-60.2 ' Casein 14.8-18.7 Styrene butadiene latex 22.2-28 Sodium hexametaphosphate 0.28-0.81 Alkali 0.19-1.19 Terpineol 1.33-1.65 2. The composition according to claim 1, characterized in that. As alkali, it contains a mixture of caustic soda and ammonium hydroxide.