Classifications

• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
  • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
  • D21H17/63—Inorganic compounds
  • D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
  • D21H17/675—Oxides, hydroxides or carbonates
• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
  • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
  • D21H17/03—Non-macromolecular organic compounds
  • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
  • D21H17/17—Ketenes, e.g. ketene dimers
• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
  • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
  • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
  • D21H21/16—Sizing or water-repelling agents

Definitions

• the present invention relates to a ketene dimer-based paper-making sizing agent, and more particularly, to a ketene-dimer-based sizing agent excellent in sizing effect and storage stability.
• a ketene dimer-based paper-making sizing agent and more particularly, to a ketene-dimer-based sizing agent excellent in sizing effect and storage stability.
• phenolic cellulose products such as paper, paperboard, and wood fiberboard are generally made by adding a sizing agent to an aqueous dispersion of phenolic cellulose fibers.
• the sizing agent is a D-zine sizing agent that is ⁇ , a papermaking agent, which imparts water resistance, ink resistance, bleeding resistance, etc. to normally obtained products. Is widely used.
• the sizing agent exerts its effect only when it is used in combination with a sulfate buffer to fix the fiber to the fiber. The harmful effects of the use of this code have been pointed out.
• Ketene dimer-based sizing agents are generally stored and used in the form of an aqueous dispersion, and need to have good stability.
• conventional ketene dimer-based sizing agents have poor storage stability due to the crystallinity of the ketene dimer component in the dispersion layer. Had a fatal drawback.
• a method of adding various non-crystalline components to improve stability has been proposed, there is a disadvantage that the size effect is reduced.
• the present inventors have conducted intensive studies on a substance that can function as a stability improver in order to solve the above-mentioned problems, and as a result, a specific polyminium compound was found.
• the storage stability of an aqueous dispersion of a keten dimer-based diluent can be significantly improved, and the inherent sizing properties of the keten dimer are reduced. I found the surprising fact that this is not the case.
• the present invention has been completed for the first time based on such facts. Disclosure of the invention
• the present invention relates to a ketene dimer-based paper-making size agent comprising a ketene dimer-containing dispersion layer and a dispersant-containing aqueous continuous layer, comprising a polyhydric alcohol.
• the present invention relates to a ketendimer-based sizing agent characterized in that it contains minilum and / or aluminum chloride.
• aluminum hydroxide and / or Z or aluminum chloride are contained as storage stabilizers.
• the aluminum hydroxide used in the present invention is, for example, a compound represented by the following general formula (I): [ ⁇ (0 ⁇ ) 3 M CH 3 (I) (where i is 25), etc.
• the polychlorinated aluminum used in the present invention is, for example, a compound represented by the following general formula (II):
• the aluminum polychloride used in the present invention is usually any aluminum polychloride used in the present invention.
• both poly (vinyl hydroxide) and poly (vinyl chloride) may be used without limitation to their degree of condensation, but may be stored.
• aluminum hydroxide is more preferred.
• aluminum hydroxide represented by the general formula (I) is preferred.
• Integers from £ 0 to 21 are preferred.
• Specific examples of such aluminum hydroxides include, for example, Paho # 2S manufactured by Asada Chemical Industry Co., Ltd. o
• the amount of aluminum hydroxide and polyvinyl chloride or aluminum chloride used is as follows:
• the amount of £ 5 there is no particular limitation on the amount of £ 5, but usually about 0.1 to 20% by weight, preferably 0.1 to: 0% by weight, based on the keten dimer forming the dispersion layer. More preferably, the content is 0.1 to 5% by weight. Strength, strength, strength, if used less than 0.1% by weight, stability In the case where the content cannot be sufficiently improved or exceeds 10% by weight, the size effect tends to decrease.
• ketene dimer forming the dispersion layer of the sizing agent of the present invention
• various known ones can be arbitrarily selected and used.
• a specific example of such a keten dimer is, for example, the general formula (I):
• R i-CH C-CH-R 2 (I)
• R i and R 2 each represent a hydrocarbon residue having 8 to 30 carbon atoms, preferably a hydrocarbon residue having 10 to 25 carbon atoms). It is.
• hydrocarbon residues include, for example, decyl, pendecyl, dodecyl, tridecyl, tetradecyl, pentradecyl, Alkyl groups such as hexadecinole, heptadecyl, octadenesole, eicosineole; decenyl, tridecenyl, hexadecenenyl, octadeceenyl, eicosenyl, etc.
• An olenokenyl group, etc. can be used.These keten dimers can be used alone or in combination. Naturally, it can be synthesized from fatty acids, tallow oil, hardened tallow oil, and so on.
• a cationic dispersant can be used as the dispersant.
• Such cationic dispersants also have a function of fixing the obtained sizing agent to cellulose fibers.
• the cationic dispersant usually contains at least one of primary, secondary, tertiary, and quaternary ammonium groups.
• the cationized starch is suitable as a dispersant used in the present invention.
• the cationic dispersants used in the present invention include those described above.
• Polyurethane resin, disilane diamide aldehyde resin, urea aldehyde resin, melamine honoremaldehyde resin Resin, dimethylamine chlorohydrin resin, etc. can be used, but the amount of cationic dispersant used is usually O is about 0.5 to 100% by weight, preferably 5 to 30% by weight, based on
• nonionic dispersants such as polyvinyl alcohol and oxidized starch may be used as the dispersant.
• conventional nonionic or anionic surfactants can be used as required.
• various additives generally used for keten dimer-based sizing agents for example, aromatic hydrocarbon resins, alicyclic hydrocarbons, etc. Hydrogen resin, hydrogenated petroleum resin, rosin esters, etc. can be used.
• an aqueous dispersion of the ketene dimer primary paper sizing agent of the present invention can be obtained.
• the non-volatile concentration of the self-dispersion liquid is not particularly limited, and may be determined arbitrarily. Usually, the concentration is about 5 to 40% by weight. There are no particular restrictions on the order of addition, the method of addition, etc., and various known methods, for example, so-called reversal emulsification, solvent emulsification, forced emulsification, etc. can be selected as appropriate.
• the sizing agent of the present invention can be prepared
• the sizing agent of the present invention is usually used as an internally added sizing agent. It is usually used in a proportion of about 0.005 to 3% by weight, preferably 0.01 to 2% by weight, based on the dry weight of cellulosic male fiber.
• known chemicals such as paper strength agents and drainage agents can be added as appropriate, and acidic papermaking can be performed in a neutral or weak alkaline pH range. All of the above-mentioned problems that are seen during the solitary period will be solved.
• the sizing agent of the present invention can be used as a surface sizing agent depending on the case. The application amount in this case is usually about 0.001 to 5 g Zm 2 in terms of solid content.
• Keten dimer produced from hydrogenated tallow oil in the general formula (H), RI and R 2 are each a mixed alkyl group having 14 to 16 carbon atoms) ( Hereafter referred to as AKD (a)) 240 parts, 570 parts of a 10% aqueous solution obtained by steaming thiothionized starch (nitrogen content 0.5% or more), polyhydroxy aluminum 20 parts of a 15% aqueous solution of sodium (of the general formula (I), with 19 to 21) (Paho # 2S, manufactured by Asada Chemical Industry Co., Ltd.) and deionized water
• size agent (1) non-volatile content and viscosity
• Example 2 In the formula (1H), R 1 and R 2 are the same as those of the keten dimer manufactured by using the stearic acid ability instead of AKD (a).
• An aqueous dispersion was obtained in the same manner as in Example 1 except that 240 parts of an alkyl group having 16 carbon atoms (hereinafter referred to as AKD ⁇ b) was used.
• Table 1 shows the nonvolatile content and viscosity (25) of this product (hereinafter referred to as size agent (2)).
• Ketene dimer manufactured from behenic acid in place of AKD ⁇ a) — (In the general formula, R 1 and R 2 are each an alkyl having 20 carbon atoms.)
• An aqueous dispersion was obtained in the same manner as in Example 1 except that 240 parts of AKD (hereinafter referred to as "AKD”) was used.
• Table 1 shows the nonvolatile content and viscosity (at 25) of (3)).
• Example 1 in each case, aluminum hydroxide was used instead of aluminum hydroxide (in the general formula ( ⁇ ), n force 3 and m force ⁇ Aqueous dispersions (hereinafter, referred to as size agents (4) to (6), respectively) were obtained in the same manner as in Examples 1 to 3 except that the above (1) was used.
• Table 1 shows the nonvolatile content and viscosity (at 25) of these sizing agents.
• aqueous dispersions were obtained in the same manner as in Example 2 except that the amount of aluminum hydroxide was changed.
• Table 1 shows the nonvolatile content S and viscosity (25 ° C) of the obtained aqueous dispersion (hereinafter, referred to as size agents (7) to (9)).
• Example 5 the amount of aluminum chloride used was reduced.
• Various aqueous dispersions were obtained in the same manner as in Example 5, except for the change.
• Table 1 shows the nonvolatile content and the viscosity (25) of the obtained aqueous dispersion (hereinafter, referred to as size agents (10) to 02), respectively.
• aqueous dispersion was obtained in the same manner as in Example 2 except that the poly (hydroxylamine) was not used.
• Table 1 shows the nonvolatile content and the viscosity (25 :) of the obtained aqueous dispersion (hereinafter, referred to as comparative size agent (1)).
• Example 2 An aqueous dispersion was obtained in the same manner as in Example 2 except that 3 g of aluminum sulfate was used instead of aluminum hydroxide. .
• Table 1 shows the nonvolatile content and the viscosity (at 25) of the obtained aqueous dispersion (hereinafter referred to as comparative sizing agent (2)).
• Example 2 An aqueous dispersion was obtained in the same manner as in Example 2 except that magnesium chloride was used in place of aluminum hydroxide in the same manner as in Example 2 except that 3 g of magnesium chloride was used.
• Table 1 shows the nonvolatile content and the viscosity (at 25) of the obtained aqueous dispersion (hereinafter, comparative size agent (3)).
• La Li a pair of the above-mentioned various Size Lee's agent to the pulp of 0.3 % (In terms of non-volatile content)
• a tappi standard sheet machine to obtain a basis weight of 60 ⁇ 1 g Zirf. I made a paper.
• the obtained wet paper web is dehydrated at 3 kg / eii for 5 minutes, and then 100 with a rotary dryer. After drying at C for 1 minute, the stock is 20. C, (humidified for 24 hours under the condition of 55% B.H.).
• the degree of steak size (JIS P 8122) was measured for these stocks.
• PAH Aluminum hydroxide
• the ketene dimer-based paper-making sizing agent of the present invention does not reduce the sizing effect inherent to ketene dimer, and Since the stability of storage (storage), which was a drawback of the ketene dimer of No. 02), has been significantly improved, it has been demanded for neutral papermaking, etc. O It can be used for

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• 1989
  • 1989-04-28 JP JP1109812A patent/JPH02293493A/ja active Granted
• 1990
  • 1990-04-25 US US07/655,417 patent/US5145522A/en not_active Expired - Lifetime
  • 1990-04-25 DE DE4090740A patent/DE4090740C2/de not_active Expired - Lifetime
  • 1990-04-25 WO PCT/JP1990/000546 patent/WO1990013707A1/ja not_active Ceased

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