TW201708385A - Dissolving pulp composition and method for producing viscose rayon - Google Patents

Abstract

The purpose of the present invention is to provide a dissolving pulp composition which can undergo a mercerization reaction in an accelerated manner. The present invention is a dissolving pulp composition characterized by comprising: a mercerization accelerator that contains a surfactant (A) having an HLB value (Oda method) of 12 to 19 as an essential component; and dissolving pulp. The mercerization accelerator preferably contains at least one component selected from the group consisting of a polyoxyalkylene compound (A1), a compound (A2) that has at least one group selected from a sulfo group, a sulfoxy group and a phosphono group, and an amphoteric surfactant (A3).

Description

Dissolving slurry composition and method for producing mucus

The present invention relates to a method for producing a dissolving pulp composition and a mucus crucible.

In order to promote the mercerization of the dissolving pulp, the step of preparing the alkali cellulose by mercerizing the dissolving pulp in an alkaline liquid to prepare the mucilage is known to be "a transparent and uniform". An aqueous composition comprising: a) an alkylene oxide adduct of from 0.05 to 1% by weight of an alkyl branched alcohol, and having the formula R ₁ O(PO) _m (CH ₂ CH ₂ O) _n H (where R ₁ is a branched alkyl group having 8 to 12 carbon atoms; PO is a propyleneoxy group; m is a number of 0 to 3 and n is a number of 2 to 7) of an alkylene oxide adduct; b) 0.15 to 2 % by weight of alkali metal hydroxide and / or basic complexing agent; c) 0.025 ~ 1.75% by weight of hexyl glucoside and / or octyl imido dipropionate; d) 0.025 ~ 1.25 wt% according to wearing The Davies method has a second interfacially active nonionic alkylene oxide adduct having an HLB value of at least 6.4, and the second interfacially active nonionic alkylene oxide adduct has the formula R ₂ O (C ₂ H ₄ O) _x (AO) _y H (wherein R ₂ is an alkyl group having 9 to 20 carbon atoms; AO is an alkoxy group having 3 to 4 carbon atoms; x is a number from 5 to 100 and y It is a number of 0 to 4) (Patent Document 1).

Prior technical literature Patent literature

Patent Document 1 Japanese Patent No. 4870555 (corresponding to International Patent Application: WO2004/099355A1)

Even if a conventional aqueous composition is used, there is a problem that the mercerization reaction is not sufficiently carried out.

It is an object of the present invention to provide a dissolving slurry composition which promotes the mercerization reaction.

The dissolving slurry composition of the present invention is characterized in that it contains a mercerizing accelerator having a HLB of 12 to 19 as a constituent component and a dissolving pulp.

The method for producing a mucus crucible of the present invention is intended to include a step of subjecting the dissolving pulp composition to a mercerization (acetonitrile) reaction to obtain an alkali cellulose.

The dissolving slurry composition of the present invention promotes the mercerization reaction. Therefore, if the dissolving slurry composition of the present invention is used, the mercerizing reaction can be carried out uniformly (in a short time) uniformly.

In the method for producing a mucus of the present invention, since the above-mentioned dissolving slurry composition is used, the mercerization reaction can be promoted, and alkali cellulose can be obtained efficiently. Therefore, according to the method for producing a mucus crucible according to the present invention, the productivity of the mucus can be greatly improved.

Best embodiment of the invention

The raw material sheet of the dissolving pulp may be any one of wood {coniferous and broad-leaved trees, and non-wood {herbs (kenaf, bagasse, bamboo, etc.)}, and is not particularly limited, and may be appropriately used if productivity is considered. Wood with a high volume and weight. The broad-leaved tree includes, for example, Eucalyptus grandis, Eucalyptus urograndis, Eucalyptus pellita, Eucalyptus camaldulensis, Eucalyptus brassiana, and Acacia meransii. The conifers include, for example, Pinus radiata, Pinus caribaea, Douglas fir, Hemlock, Redwood, and Larch. Of course, the conifer, the broadleaf tree, and the non-wood system may be used singly or in combination, and the combination is not particularly limited.

The dissolving pulp may be prepared by any one of an acidic sulfite evaporation method or an alkali distillation method (kraft cooking, polysulfide distillation, soda evaporation, alkaline sulfite evaporation), and the like. There is no special limit. When considering the quality of the dissolving pulp, energy efficiency, etc., the kraft pulp evaporation method can be suitably used. Hereinafter, a method for producing a dissolving pulp by a kraft pulp distillation method will be described, but it is of course not limited thereto.

In order to produce a dissolving pulp by a kraft pulping method, a sheet of wood or the like is heated in the presence of water to carry out a prehydrolysis treatment. The strength of the pre-hydrolysis is preferably from 200 to 1000, and the temperature is preferably from 160 to 170 ° C. The treatment temperature is determined by the treatment time. Moreover, the P factor is calculated from the temperature and time at the time of the previous hydrolysis. The apparatus used in the pre-hydrolysis step is not particularly limited, and a widely used continuous steaming pot, batch type pot, or the like is preferably used.

The chip of the wood or the like after the hydrolysis treatment is sent to the alkali evaporation step. The apparatus used for the alkali evaporation is not particularly limited, and a continuous continuous steaming pot, a batch type pot, or the like is preferably used. When the wood is subjected to kraft pulp evaporation, the vulcanization degree of the kraft pulp evaporating liquid is preferably 20 to 35%, and the effective alkali addition rate per dry anhydrous wood is preferably 10 to 25% by weight, and the distillation temperature is preferably 140 to 170 ° C, which can be a distillation method in which the white liquor is distilled, and the method is not particularly limited.

The Kappa number of the unbleached pulp obtained by alkali evaporation is not particularly limited. When the quality of the dissolving pulp and the subsequent bleaching property are considered, the Kappa number is preferably 6 to 18 when the broadleaf tree is used as the raw material. When the conifer is used as the raw material, the Kappa number is preferably from 20 to 35.

The unbleached pulp is subjected to a bleaching treatment by a conventional bleaching method after a washing, roughing and selection step, preferably by a conventional oxygen delignification method (a bleached pulp can be obtained). In the bleaching step, a multi-stage bleaching step of a bleaching stage of chlorine dioxide, alkali, oxygen, hydrogen peroxide and ozone is generally combined, and the unbleached pulp is finally bleached to a whiteness of 87 to 92% ISO, preferably 89 to 92%. ISO, a dissolving pulp is obtained.

The main component of the bleached pulp is cellulose and hemicellulose, and contains impurities such as lignin and resin. Further, in the bleached pulp, 95 to 99% by weight of the pulp cellulose and 1 to 5% by weight of the hemicellulose are dissolved, and about 85% by weight of the cellulose for papermaking and about 15% by weight of hemicellulose. On the other hand, cotton-based cellulose is 99% by weight or more and hemicellulose is less than 1% by weight.

The HLB (Oda Method) of the surfactant (A) which is an essential component of the mercerization promoter is 12 to 19, preferably 13 to 18, and particularly preferably 14 to 17. Within this range, the mercerization reaction can be further promoted.

HLB is a balance between organic and inorganic, and is an abbreviation for Hydrophile-Lipophile Balance. HLB is a value obtained by the Odak method, and is a value calculated from the value of organic matter and inorganicity by the following formula (Oda, Ichimura, "Synthesis and Application of Surfactant", page 501, 槇书店, 1957; Fujimoto Takehiko, "Introduction to New Interface Agents", pp. 197-198, Sanyo Chemical Industry Co., Ltd., 1985; corresponding English book "New Introduction to Suface Active Agents", pp. 196-197, 1985 ).

(HLB) = (value of inorganicity) ÷ (value of organic matter) × 10

The surfactant (A) having HLB in the above range comprises a conventional surfactant, preferably selected from the group consisting of polyoxyalkylene alkyl compounds (A1); having at least 1 of a sulfo group, a sulfooxy group or a phosphonium group. At least one of the group of the compound (A2) and the amphoteric surfactant (A3). Among these, a polyoxyalkylene compound (A1); a compound (A2) having at least one of a sulfo group, a sulfooxy group or a phosphonium group, more preferably a polyoxyalkylene group compound (preferably) A1) is particularly preferably a compound of the formula (1).

R ¹ [(-OA) _n -OR ² ] _m (1)

R ¹ represents a hydrogen atom, an alkyl group having 1 to 30 carbon atoms, an alkenyl group having 2 to 30 carbon atoms, a mercapto group having 2 to 30 carbon atoms, or a reaction residue obtained by removing m hydroxyl groups from a polyhydric alcohol; and R ² represents hydrogen; An atom, an alkyl group having 1 to 30 carbon atoms, an alkenyl group having 2 to 30 carbon atoms or a fluorenyl group having 2 to 30 carbon atoms; OA representing an oxygen alkyl group having 2 to 4 carbon atoms; and n representing an integer of 2 to 100; m represents an integer from 1 to 6.

a hydrogen atom, an alkyl group having 1 to 30 carbon atoms, an alkenyl group having 2 to 30 carbon atoms, a mercapto group having 2 to 30 carbon atoms, or a reaction residue (R ¹ ) after removing m hydroxyl groups from a polyhydric alcohol, carbon A linear alkyl group and a branched alkyl group can be used for the alkyl group of 1 to 30.

The linear alkyl group may, for example, be a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, a decyl group, a decyl group, an undecyl group, a dodecyl group or a thirteen group. Alkyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl, eicosyl, icosyl, behenyl, Thirteen trialkyl, tetracosyl, dipentadecyl, hexadecyl, hexadecyl, octadecyl, octadecyl and tridecyl, and the like.

The branched alkyl group may, for example, be isopropyl, isobutyl, tert-butyl, isopentyl, neopentyl, isohexyl, isotridecyl, isotetradecyl or iso-octadecyl. , iso-octadecyl, 2-ethylhexyl, 8-methyl-1-indenyl, 2-propylheptyl, 2-butyloctyl, 2-hexyldecyl, 2-octyldodecane Base, 2-mercaptotetradecyl, 2-dodecylhexyl, 2-dodecylhexadecyl, 3,5,5-trimethylhexyl and 3,7,11-trimethyl Dodecyl and the like.

Further, among R ¹ , a linear alkenyl group and a branched alkenyl group can be used as the alkenyl group having 2 to 30 carbon atoms.

Examples of the linear alkenyl group include a vinyl group, an allyl group, a propenyl group, a butenyl group, a pentenyl group, a heptenyl group, an octenyl group, a nonenyl group, a nonenyl group, an undecenyl group, and twelve Alkenyl, tridecenyl, tetradecenyl, pentadecyl, hexadecenyl, heptadecenyl, octadecyl, pentadecenyl, icosyl, twenty-tenyl, two Dodecenyl, behenyl, tetracosyl, pentadecyl, hexadecenyl, heptacosyl, octadecyl and octadecyl, and the like.

Examples of the branched alkenyl group include an isobutenyl group, an isopentenyl group, a neopentenyl group, an isohexenyl group, an isotridecenyl group, an isooctadecenyl group, and an iso-octadecyl group.

Among R ¹ , a saturated aliphatic sulfhydryl group, an unsaturated aliphatic fluorenyl group, an alicyclic fluorenyl group, and an aromatic fluorenyl group can be used as the fluorenyl group having 2 to 30 carbon atoms.

Examples of the saturated aliphatic fluorenyl group include an ethyl fluorenyl group, a propyl fluorenyl group, a butyl fluorenyl group, an isobutyl fluorenyl group, a pentamidine group, an isovaleryl group, a hexyl fluorenyl group, a decyl group, a decyl group, a 2-ethylhexyl group, Sulfhydryl, sulfhydryl, eleventh fluorenyl, thirteenth fluorenyl, thirteenth fluorenyl, isotrienyl, tetradecyl, hexadecanyl and octadecyl.

Examples of the unsaturated aliphatic fluorenyl group include propylene fluorenyl group, methacryl fluorenyl group, crotonyl group, isocrotonyl group, butenyl group, butadienyl group, pentenylene group, hexene fluorenyl group. , heptene fluorenyl, octene fluorenyl, terpene fluorenyl, terpene fluorenyl, undecyl fluorenyl, dodecenyl fluorenyl, tetradecyl fluorenyl, anthracenyl and anti-oily.

Examples of the alicyclic fluorenyl group include a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a methylcyclopentanyl group, a methylcyclohexyl group, a methylcycloheptanyl group, and a cyclopentenylene group. Base, 2,4-cyclopentadienyl, cyclohexenyl, 2,4-cyclohexadienyl, cycloheptenyl, methylcyclopentenyl, methylcyclohexene And methylcycloheptene fluorenyl and the like.

Examples of the aromatic fluorenyl group include a benzamidine group, a tolylmethyl group, a cinnamyl group, and a naphthyl group.

Further, among R ¹ , a polyol which can form a reaction residue obtained by removing m hydroxyl groups from a polyol includes: a glycol (aliphatic diol, alicyclic diol, and aromatic diol), ternary Alcohols (aliphatic triols, alicyclic triols and aromatic triols), tetrahydric alcohols (aliphatic tetraols, alicyclic tetraols and aromatic tetraols), pentahydric alcohols (aliphatic pentaols, fats) Cyclic pentaol and aromatic pentaol) and hexahydric alcohol (aliphatic hexaol, alicyclic hexaol and aromatic hexaol).

The aliphatic diol is an aliphatic diol having 2 to 18 carbon atoms, and examples thereof include ethylene glycol, propylene glycol, butylene glycol, hexanediol, neopentyl glycol, diethyl propylene glycol, and octadecyl alcohol. , diethylene glycol, triethylene glycol, tetraethylene glycol, trimethyl pentanediol and di(hydroxyethyl) sulfide.

The alicyclic diol is an alicyclic diol having 8 to 15 carbon atoms, and examples thereof include 1,4-cyclohexanedimethanol, 4,4'-dihydroxydicyclohexane, and dihydroxydicyclohexyl. Dimethylmethane and the like.

The aromatic diol is an aromatic diol having 6 to 15 carbon atoms, and examples thereof include catechol, hydroquinone, bisphenol A, bisphenol F, bisphenol S, and 1,4-dihydroxynaphthalene.

The aliphatic triol includes an aliphatic triol having 3 to 11 carbon atoms, and examples thereof include glycerin, trimethylolethane, trimethylolpropane, trimethyloloctane, and hexanetriol.

The alicyclic triol contains an alicyclic triol having 6 to 15 carbon atoms, and examples thereof include trihydroxycyclohexane, trihydroxydicyclohexane, and trihydroxydicyclohexyldimethylmethane.

The aromatic triol includes an aromatic triol having 6 to 15 carbon atoms, and examples thereof include trihydroxybenzene, trihydroxybiphenyl, and trihydroxydiphenyldimethylmethane.

The aliphatic tetraol is an aliphatic tetraol having 5 to 12 carbon atoms, and examples thereof include diglycerin, neopentyltetraol, trimethylolpentane, and ditrimethylolpentane.

The alicyclic tetraol includes an alicyclic tetraol having 6 to 15 carbon atoms, and examples thereof include tetrahydroxycyclohexane, tetrahydroxydicyclohexane, sorbitan, and tetrahydroxydicyclohexyldimethylmethane. .

The aromatic tetraol is an aromatic tetraol having 6 to 15 carbon atoms, and examples thereof include tetrahydroxybenzene, tetrahydroxybiphenyl, and tetrahydroxydiphenyldimethylmethane.

The aliphatic pentaerythritol contains an aliphatic pentaol having 5 to 9 carbon atoms, and examples thereof include triglycerin and xylitol.

The alicyclic pentaol contains an alicyclic pentaol having 6 to 12 carbon atoms, and examples thereof include pentahydroxycyclohexane, pentahydroxydicyclohexane, pentahydroxydicyclohexyldimethylmethane, and hydroquinone-β. -D-glucoside and the like.

The aromatic pentaerythritol contains an aromatic pentaal having 6 to 15 carbon atoms, and examples thereof include pentahydroxybenzene, pentahydroxybiphenyl, and pentahydroxydiphenyldimethylmethane.

The aliphatic hexahydric alcohol contains an aliphatic hexahydric alcohol having 6 to 12 carbon atoms, and examples thereof include sorbitol, tetraglycerin, and dipentaerythritol.

The alicyclic hexaol is an alicyclic hexaol having 6 to 15 carbon atoms, and examples thereof include hexahydroxycyclohexane, hexahydroxydicyclohexane, and hexahydroxydicyclohexyldimethylmethane.

The aromatic hexahydric alcohol contains an aromatic hexahydric alcohol having 6 to 15 carbon atoms, and examples thereof include hexahydroxybenzene, hexahydroxybiphenyl, and hexahydroxydiphenyldimethylmethane.

The reaction residues after the removal of m hydroxyl groups do not necessarily mean that the reaction residues of all the hydroxyl groups of the polyol are completely removed, and that some of the hydroxyl groups remain in the reaction residues. Therefore, the number of hydroxyl groups of the polyol does not necessarily coincide with the value of m. That is, the relationship between the number of hydroxyl groups (s) of the polyol and the number of hydroxyl groups (m) to be removed is s≧m.

Among R ¹ , from the viewpoint of promoting the mercerization reaction, an alkyl group having 2 to 22 carbon atoms, an alkenyl group having 2 to 22 carbon atoms, a fluorenyl group having 2 to 22 carbon atoms, and m groups of hydroxyl groups removed from the polyol are used. The reaction residue is preferably a reaction residue of 3 to 18 carbon atoms, 3 to 18 carbon atoms, 12 to 18 carbon atoms, and 2 to 6 carbon atoms for removing m hydroxyl groups. The base is more preferably, the alkyl group having 3 to 18 carbon atoms, the alkenyl group having 3 to 18 carbon atoms, and the fluorenyl group having 12 to 18 carbon atoms are particularly preferred, and the dodecyl group, dodecyl group and dodecene are used. The base, 2-ethylhexyl and 8-methyl-1-indenyl are preferred.

A hydrogen atom, an alkyl group having 1 to 30 carbon atoms, an alkenyl group having 2 to 30 carbon atoms, and an anthracene group (R ² ) having 2 to 30 carbon atoms are the same as those of R ¹ . Among R ² , from the viewpoint of promoting the mercerization reaction, a hydrogen atom, an alkyl group having 2 to 22 carbon atoms, an alkenyl group having 2 to 22 carbon atoms, and a fluorenyl group having 2 to 22 carbon atoms are preferred, and a hydrogen atom is used. , an alkyl group having 3 to 18 carbon atoms, an alkenyl group having 3 to 18 carbon atoms, and a fluorenyl group having 3 to 18 carbon atoms are more preferably a hydrogen atom, a tetradecyl group, an 18-mercapto group, an oil-based group, and ten Dialkyl, octadecyl, dodecenyl and octadecyl are particularly preferred.

The oxygen-extended alkyl group (OA) having 2 to 4 carbon atoms includes an oxygen-extended ethyl group, an oxygen-extended propyl group, and an oxygen-extended butyl group. Among these, from the viewpoint of promoting the mercerization reaction, etc., it is preferred to use an oxygen-extended ethyl group and an oxygen-extended propyl group.

(-OA) When _n is composed of two or more kinds of oxygen-extended alkyl groups, the combination of n oxygen-extended alkyl groups may be a block or a random or a combination thereof. Moreover, m (-OA) _n -OR ² may be the same or different.

The n is preferably an integer of 2 to 100, more preferably an integer of 4 to 80, more preferably an integer of 6 to 60, and an integer of 8 to 50 is optimal. Within this range, the mercerization reaction can be further promoted.

The m system is preferably an integer of 1 to 6, and more preferably an integer of 1 to 3. Within this range, the mercerization reaction can be further promoted.

The polyoxyalkylene group-containing compound (A1) can be produced by a conventional method (JP-A-2003-268291, JP-A-H09-117607, etc.).

The polyoxyalkylene alkyl compound (A1) may, for example, be an ethylene oxide 10 molar addition product of 2-ethylhexanol (HLB14) or an ethylene oxide 30 molar of 2-ethylhexanol. Product (HLB17), 2-ethylhexanol ethylene oxide 11 mole/propylene oxide 1 molar block adduct (HLB14), 2-ethylhexanol ethylene oxide 60 mole /propylene oxide 20 molar block adduct (HLB14), 8-methyl-1-nonanol ethylene oxide 12 molar addition (HLB14), 8-methyl-1-nonanol Ethylene oxide 15 molar addition (HLB14), 8-methyl-1-nonanol ethylene oxide 40 molar addition (HLB17), 8-methyl-1-nonanol propylene oxide 1 molar / ethylene oxide 14 Moir block adduct (HLB14), 8-methyl-1-nonanol propylene oxide 20 mol/ethylene oxide 60 molar block adduct (HLB14), 1-dodecanol Ethylene oxide 12 molar addition (HLB14), 1-dodecyl alcohol ethylene oxide 21 molar addition (HLB15), 1-dodecanol ethylene oxide 40 mole / propylene oxide 3 molar block adduct of laurate (HLB14), 1-dodecyl alcohol ethylene oxide 45 molar addition (HLB17), 1-dodecanol epoxy Propane 1 mole/ethylene oxide 20 molar block adduct (HLB14), 1-dodecanol propylene oxide 20 mole/ethylene oxide 60 molar block adduct (HLB14) , dodecenol ethylene oxide 18 molar addition (HLB14), dodecenyl ethylene oxide 45 molar addition (HLB17), dodecenol propylene oxide 1 mole /oxirane 16 mole block adduct (HLB14), dodecenol propylene oxide 20 mole / ethylene oxide 60 mole block adduct (HLB14), polyoxyethylene glycol (quantitative average molecular weight 2000) of lauric acid diester ( HLB15), polyoxyethylene glycol (number average molecular weight 1000) of stearic acid monoester (HLB14), 2-ethylhexanol propylene oxide 1 molar / ethylene oxide 30 molar block adduct Lauric acid ester (HLB14), 2-ethylhexanol ethylene oxide 25 mole/propylene oxide 3 molar block adduct (HLB15), 2-ethylhexanol ethylene oxide 30 Molar/propylene oxide 3 molar block adduct (HLB16), 8-methyl-1-nonanol propylene oxide 1 mol/ethylene oxide 14 molar block adduct hard fat Acid ester (HLB14), polyoxyethylene glycol (quantitative molecular weight 2000) lauric acid diester (HLB15), glycerol ethylene oxide 30 molar addition (HLB15), glycerol propylene oxide 3 mole /ethylene oxide 9 molar block adduct (HLB14), stearic acid monoester (HLB15) of ethylene oxide 30 molar addition of glycerol and ethylene oxide 16 mole/propylene oxide 4 molar block addition of tetrahydroxycyclohexane (HLB15) and so on.

Among the polyoxyalkylene-containing alkyl compounds (A1), examples of the compound represented by the formula (1) include, for example, an alkylene oxide adduct of castor oil and an oxygen alkylene adduct of sucrose.

The compound (A2) having at least one of a sulfo group, a sulfooxy group or a phosphonium group may, for example, be an α-olefin sulfonate, an alkylbenzenesulfonic acid or a salt thereof (for example, dodecylbenzenesulfonate) Sodium (HLB14)}, naphthalene sulfonate-formaldehyde condensate, N-decylalkyl taurate, alkyl sulfate, alkyl ether sulfate {eg: lauryl alcohol oxide 3 The ear additive is a sodium salt of a sulfate (HLB15)}, an alkyl sulfosuccinate, an alkyl phosphate, and a polyoxyethylidene ether phosphate.

The amphoteric surfactant (A3) may, for example, be a higher alkylaminopropyl propionate or a higher alkyl dimethyl betaine.

The mercerizing accelerator may be composed of an amphoteric surfactant (A) as an essential constituent, and may be composed of only one type of surfactant, or may be composed of a plurality of surfactants.

In the mercerising accelerator, a polyoxyalkylene group compound (B) having an HLB (Oda method) of 1 to 7 in addition to the surfactant (A) containing HLB (Oda method) of 12 to 19 is preferable. .

The HLB system of the polyoxyalkylene compound (B) is preferably 1 to 7, more preferably 2 to 6. Within this range, the mercerization reaction can be further promoted.

The polyoxyalkylene compound (B) has the same chemical structure as the compound represented by the formula (1), and HLB (Oda Method) can be used in the above range.

The polyoxyalkylene group-containing compound (B) can be produced by a conventional method (JP-A-2003-268291, JP-A-H09-117607).

Examples of the polyoxyalkylene group-containing compound (B) include a propylene oxide 4 molar addition product of butanol (HLB4), a propylene oxide 5 molar addition product of butanol (HLB4), and a butanol ring. Oxypropane 50 molar addition (HLB4), octadecyl propylene oxide 5 molar addition (HLB2), octadecyl propylene oxide 8 molar addition (HLB2), octadecyl alcohol Propylene oxide 50 molar addition (HLB4), polyoxypropylene glycol (number average molecular weight 400; HLB4), polyoxypropylene glycol (quantitative molecular weight 4000; HLB4), propylene oxide 3 molar addition of glycerol (HLB6) , glycerol propylene oxide 69 molar addition (HLB4), ethylene oxide 5 mole / propylene oxide 30 mole block copolymer (HLB6), 2-ethylhexanol epoxy B Block alkane adduct (HLB4), 2-ethylhexanol ethylene oxide 5 mole/propylene oxide 30 mole block adduct (HLB5) , 1-dodecyl alcohol ethylene oxide 10 mole / propylene oxide 30 mole block adduct (HLB6), 1-dodecanol ethylene oxide 1 mol / epoxy Propane 30 mole block adduct (HLB4), 1-dodecyl alcohol ethylene oxide 5 mole / propylene oxide 20 mole block As was (HLB6), glycerin propylene oxide 3 mole adduct of lauric acid monoester (HLB4), polyoxyethylene glycol (number average molecular weight 200) of stearic acid ester (HLB 5) and the like.

When the polyoxyalkylene compound (B) is contained, the content (% by weight) of the surfactant (A) is 60% based on the weight of the surfactant (A) and the polyoxyalkylene compound (B). 99 is preferred, preferably 70 to 95. Further, in this case, the content (% by weight) of the polyoxyalkylene alkyl compound (B) is preferably from 1 to 40, based on the weight of the surfactant (A) and the oxygen-extended alkyl compound (B). 5~30 is better.

The mercerizing accelerator may contain a solvent (C) and other additives (D).

The solvent (C) contains water or a mixed solvent of water and a hydrophilic organic solvent. Examples of the hydrophilic organic solvent include esters having a carbon number of 4 to 8 (ethyl acetate, butyl acetate, methoxybutyl acetate, acesulfame acetate, and acesulfame acetate), and carbon number. 4~8 ethers {B Sai Susu, Ding Sai Su and propylene glycol monomethyl ether, etc.}, carbon number 3~8 ketone {acetone, methyl ethyl ketone and methyl isobutyl ketone, etc.}, carbon number 1 ~8 alcohol {methanol, ethanol, normal or isopropanol, n- or iso- or tertiary tributanol, propylene glycol and dipropylene glycol, etc.} and a heterocyclic compound having a carbon number of 5-8 {N-methylpyrrolidone, etc.} Wait.

Other additives (D) include, for example, conventional additives {dispersants, thickeners, fluidity improvers, antioxidants, ultraviolet absorbers, deodorants, perfumes, dyes, and/or preservatives, etc.).

When the mercerization promoter is composed of a plurality of components, the mercerization promoter can be obtained by uniformly mixing the plurality of components.

The content (% by weight) of the mercerising accelerator is not particularly limited, and is preferably 0.01 to 1 based on the dry weight of the dissolving pulp, more preferably 0.03 to 0.5, and particularly preferably 0.05 to 0.2. Within this range, the mercerization reaction can be further promoted.

The anhydrous dry weight of the dissolving pulp was measured at 105 ° C according to JIS P8203:2010 (corresponding to international specifications; ISO 638:2008).

The dissolving slurry composition of the present invention, if it contains a mercerizing accelerator and a dissolving pulp, is not particularly limited in its production method, and a mercerizing accelerator may be sprayed or coated on the dissolving pulp, or the dissolving pulp may be impregnated in mercerizing promotion. In the agent. From the standpoint of the simplicity of equipment design, it is preferred to spray or coat the mercerizing accelerator on the dissolving pulp. In such a production method, the mercerization accelerator can be used after being diluted with a solvent (C) or the like from the viewpoint of workability.

The form of the dissolving pulp composition of the present invention is not limited, and may be formed into a sheet shape. When the sheet is formed, the entire sheet may contain a surfactant, or a surfactant may be contained in at least one surface layer of the sheet. The method of adding the surfactant is not particularly limited. The surfactant may be formed into a sheet after adding a surfactant to the suspension containing the dissolving slurry, or the dissolving slurry may be formed into a sheet shape and then added (immersed, sprayed or coated) with a surfactant. By the addition, the surface layer portion of the sheet may contain a surfactant. Further, the sheet may be formed in a wound form.

The method for producing a mucus solution of the present invention includes a step of subjecting the above-mentioned dissolving slurry composition to a mercerization (acetonitrile) reaction to obtain an alkali cellulose, that is, a step which is conventionally combined, and is not particularly limited.

In the mercerization reaction, a conventional mercerizing treatment liquid (alkaline solution or the like) can be used, and the temperature and time of the mercerization reaction can be applied to a conventional range.

The method for producing a mucus of the present invention is a step of obtaining an alkali cellulose, followed by a step of mixing an alkali cellulose with carbon disulfide to obtain a slime fiber (sodium cellulose xanthate) (the alkali cellulose can be obtained) The step of obtaining the mucus fiber is carried out simultaneously), and even the spinning step of causing the mucus fiber to be ejected from the fine pores in the dilute sulfuric acid to obtain a mucus crucible.

The mucilage fiber obtained by using the dissolving slurry composition of the present invention as a raw material has high solubility and is characterized in that an appropriate aqueous solution viscosity can be obtained. The mucus fiber can be efficiently obtained by high solubility. Further, since an appropriate aqueous solution viscosity can be obtained, it is possible to prevent troubles at the time of spinning due to low viscosity or a decrease in the spinning speed due to high viscosity, thereby effectively producing a slime mash. It is even possible to obtain a mucus fiber having a suitable aqueous solution viscosity range, that is, a suitable degree of polymerization, thereby maintaining the necessary strength of the ray fiber. Further, since the dissolving pulp composition of the present invention has a high content of α-cellulose, it can be widely used for a representative general mucus application, and is further utilized for various other celluloses such as special antimony, chemical, medical use, and the like. The raw material of the derivative.

[Examples]

The parts and % are in the form of parts by weight and % by weight unless otherwise specified.

<Example 1>

100 parts of a tablet made of a dissolving pulp (manufactured by broadleaf trees: cellulose content 98%, basis weight 800 g/m ² ), sprayed with a mercerising accelerator (1) {2-ethylhexanol ring Oxygenethane 30 molar addition (HLB17, BLAUNON EH-30, Aoki Oil & Fats Co., Ltd.)} 5 parts diluted solution of 0.1 parts and 4.9 parts of water, at room temperature (25~30 ° C, below) The same) was dried under air to obtain a dissolving slurry composition (1) of the present invention.

<Example 2>

In addition to the mercerization promoter (1) {2-ethylhexanol ethylene oxide 30 molar addition (HLB17)} 0.1 parts changed to mercerization promoter (2) {8-methyl-1- Ethylene oxide 15 molar addition of sterol (HLB14, NOIGEN SD-150, First Industrial Pharmaceutical Co., Ltd.; "NOIGEN" is a registered trademark of the same company.)} Except for 0.1 part, proceed with Example 1 In the same operation, the dissolving slurry composition (2) of the present invention was obtained.

<Example 3>

In addition to the mercerization promoter (1) {2-ethylhexanol ethylene oxide 30 molar addition (HLB17)} 0.1 parts changed to mercerization promoter (3) {1-dodecanol ring The dissolving slurry composition (3) of the present invention was obtained in the same manner as in Example 1 except that 0.1 part of the oxirane 21 molar addition product (HLB15, BLAUNON EL-1521, Aoki Oil & Fats Co., Ltd.) was used.

<Example 4>

In addition to the mercerization promoter (1) {2-ethylhexanol ethylene oxide 30 molar addition (HLB17)} 0.1 parts changed to mercerization promoter (4) {2-ethylhexanol The same procedure as in Example 1 was carried out except that 0.1 part of ethylene oxide 30 mol/propylene oxide 3 molar block adduct (HLB16)} was obtained, and the dissolving slurry composition (4) of the present invention was obtained. Further, an ethylene oxide 30 mol/propylene oxide 3 molar block adduct of 2-ethylhexanol is prepared by a conventional alkylene oxide addition reaction.

<Example 5>

In addition to the mercerization promoter (1) {2-ethylhexanol ethylene oxide 30 molar addition (HLB17)} 0.1 parts changed to mercerization promoter (5) The same operation as in Example 1 was carried out, except that {1-dodecyl alcohol ethylene oxide 40 mol/propylene oxide 3 molar block adduct lauric acid ester (HLB14)} 0.1 part, The dissolving slurry composition (5) of the present invention is obtained. Further, the lauric acid ester of 1-oxime alcohol ethylene oxide 40 mol/propylene oxide 3 molar block adduct is prepared by a conventional alkylene oxide addition reaction and esterification reaction.

<Example 6>

In addition to the mercerization promoter (1) {2-ethylhexanol ethylene oxide 30 molar addition (HLB17)} 0.1 parts changed to mercerization promoter (6) {2-ethylhexanol The same procedure as in Example 1 was carried out except that the ethylene oxide 10 molar addition product (HLB14) was 0.1 part, and the dissolving slurry composition (6) of the present invention was obtained. Further, an ethylene oxide 10 molar addition of 2-ethylhexanol is prepared by a conventional alkylene oxide addition reaction.

<Example 7>

In addition to the mercerization promoter (1) {2-ethylhexanol ethylene oxide 30 molar addition (HLB17)} 0.1 parts changed to mercerization promoter (7) {dodecylbenzenesulfonic acid Sodium (HLB14, NEOPELEX G-15, Kao Co., Ltd.; "NEOPELEX" is a registered trademark of the same company.)} In the same manner as in Example 1, except for 0.1 parts, the dissolving slurry composition of the present invention (7) was obtained. .

<Example 8>

In addition to the mercerization promoter (1) {2-ethylhexanol ethylene oxide 30 molar addition (HLB17)} 0.1 parts changed to mercerization promoter (8) {1-dodecanol ring Oxygenethane 21 molar addition (HLB15, BLAUNON EL-1521, manufactured by Aoki Oil & Fats Co., Ltd. Made of 90 parts of propylene oxide 5 molar addition of butanol (HLB4, Newpol LB-65, Sanyo Chemical Industry Co., Ltd.; "Newpol" is a registered trademark of the same company.) 10 uniform blends} 0.1 The same operation as in Example 1 was carried out, except that the dissolving slurry composition (8) of the present invention was obtained.

<Example 9>

In addition to the mercerization promoter (1) {2-ethylhexanol ethylene oxide 30 molar addition (HLB17)} 0.1 parts changed to mercerization promoter (9) {2-ethylhexanol Ethylene oxide 25 mol/propylene oxide 3 molar block adduct (HLB15) 70 parts and octadecyl alcohol propylene oxide 8 molar addition (HLB2) 30 parts homogeneously mixed} 0.1 parts The same operation as in Example 1 was carried out to obtain a dissolving slurry composition (9) of the present invention. Further, an ethylene oxide 25 mol/propylene oxide 3 molar block adduct of 2-ethylhexanol is prepared by a conventional alkylene oxide addition reaction.

<Example 10>

In addition to the mercerization promoter (1) {2-ethylhexanol ethylene oxide 30 molar addition (HLB17)} 0.1 parts changed to mercerization promoter (10) {2-ethylhexanol Ethylene oxide 30 molar addition (HLB17, BLAUNON EH-30, Aoki Oil & Fats Co., Ltd.) 95 parts and polyoxypropylene glycol (quantitative average molecular weight 4000, HLB4, Newpol PP-4000, Sanyo Chemical Industry Co., Ltd.) The same operation as in Example 1 was carried out except that 5 parts of the homogeneous mixture were 0.1 parts to obtain the dissolving slurry composition (10) of the present invention.

<Example 11>

In addition to the mercerization promoter (1) {2-ethylhexanol ethylene oxide 30 molar addition (HLB17)} 0.1 parts changed to mercerization promoter (11) {1-dodecyl alcohol ethylene oxide 21 molar addition (HLB15, BLAUNON EL-1521, Aoki Oil Industry Co., Ltd.) 90 parts and 1-dodecyl alcohol ethylene oxide 5 Mo The same procedure as in Example 1 was carried out except that the ear/propylene oxide 20 molar block adduct (HLB6) was uniformly mixed with 0.1 parts to obtain the dissolving slurry composition (11) of the present invention. Further, an ethylene oxide 5 mol/propylene oxide 20 molar block adduct of 1-dodecyl alcohol is prepared by a conventional alkylene oxide addition reaction.

<Example 12>

In addition to the mercerization promoter (1) {2-ethylhexanol ethylene oxide 30 molar addition (HLB17)} 0.1 parts changed to mercerization promoter (12) {1-dodecanol ring Oxygenethane 21 molar addition (HLB15, BLAUNON EL-1521, Aoki Oil & Fats Co., Ltd.) 90 parts and glycerol propylene oxide 3 molar addition of lauric acid monoester (HLB4) 10 parts evenly mixed The same operation as in Example 1 was carried out except for 0.1 parts to obtain a dissolving slurry composition (12) of the present invention. Further, the lauric acid monoester of the propylene oxide 3 molar addition of glycerin is prepared by a conventional alkylene oxide addition reaction and esterification reaction.

<Example 13>

In addition to the mercerization promoter (1) {2-ethylhexanol ethylene oxide 30 molar addition (HLB17)} 0.1 parts changed to mercerization promoter (13) {1-dodecanol ring Oxygenethane 21 molar addition (HLB15, BLAUNON EL-1521, Aoki Oil & Fats Co., Ltd.) 90 parts and polyoxyethylene glycol (number average molecular weight 200) of stearic acid diester (HLB5) 10 parts evenly The same operation as in Example 1 was carried out, except that the mixture was 0.1 parts, to obtain a dissolving slurry composition (13) of the present invention. In addition, gather The stearic acid diester of oxyethylene glycol (the number average molecular weight of 200) is prepared by a conventional alkylene oxide addition reaction and esterification reaction.

<Example 14>

100 parts of a tablet made of a dissolving pulp (manufactured by broadleaf trees: cellulose content 98%, basis weight 800 g/m ² ), sprayed with a mercerising accelerator (1) {2-ethylhexanol ring After 5 parts of a diluted solution of 0.05 parts of oxyethylene 30 molar addition (HLB17)} and 4.95 parts of water, the mixture was air-dried at room temperature to obtain a dissolving slurry composition (14) of the present invention.

<Example 15>

100 parts of a tablet made of a dissolving pulp (manufactured by broadleaf trees: cellulose content 98%, basis weight 800 g/m ² ), sprayed with a mercerising accelerator (1) {2-ethylhexanol ring After 5 parts of a diluted solution of 0.2 parts of oxyethylene 30 molar addition product (HLB17)} and 4.8 parts of water, the mixture was air-dried at room temperature to obtain a dissolving slurry composition (15) of the present invention.

<Comparative Example 1>

The same operation as in Example 1 was carried out except that 0.1 part of the mercerising accelerator (1) {2-ethylhexanol ethylene oxide 30 molar addition (HLB17)} was changed to 0.1 part of water. The dissolving slurry composition (H1) of the present invention.

<Promotional evaluation of mercerizing reaction>

For the dissolving slurry compositions prepared in Examples 1 to 15 and Comparative Example 1, each dissolving slurry composition (anhydrous dry weight: 14.4 g) was separated from 361 mL of a 13.7% sodium hydroxide aqueous solution to obtain a pulp, and then carbon disulfide was added thereto. 8 mL, a three-hour silk photochemical reaction was carried out in a constant temperature oscillator (170 rpm) with an internal temperature of 20 ° C to prepare a mucin fiber solution (simultaneously, a mercerized reaction of alkali cellulose was obtained, and alkali cellulose and carbon disulfide were reacted to obtain a mucus Reaction of the fiber solution). Then, 250 mL of the mucus fiber solution was filled in a special filter (10,000 mesh/cm ^{2 of a} stainless steel filter), and the filtrate (mucus fiber solution) was collected in a cylinder of 250 mL. The filtration time (t1) of the filtrate from 25 mL to 50 mL was measured, respectively, and the filtration time (t2) was also performed from 125 mL to 150 mL, and the time difference (t2-t1) was determined. The values are shown in Table 1 based on the following criteria. It can also be said that the smaller the time difference, the more the mercerization reaction can be promoted.

◎: When the time difference of filtration is 0 seconds or more and less than 5 seconds, the mercerization reactivity is particularly high.

○: When the time difference of filtration is 5 seconds or more and less than 10 seconds, the mercerization reactivity is extremely high.

□: When the time difference of filtration is 10 seconds or more and less than 20 seconds, the mercerization reactivity is high.

△: When the time difference of filtration was 20 seconds or more, the mercerization reactivity was poor.

X: The filtered mucus fiber solution did not reach 150 mL even after 10 minutes, and therefore the mercerization reactivity was very poor.

<Comparative Example 2>

The mercerizing treatment liquid described in Example 1 of Patent Document 1 {2-ethylhexanol ethylene oxide 4 molar addition product (HLB10, Newcol 1004 Japan Emulsifier Co., Ltd.) 0.004 parts, sodium hydroxide 13.7 parts and 86.3 parts of water were uniformly mixed} 361 mL and dissolving pulp sheets (manufactured by broadleaf trees: cellulose content 98%, basis weight 800 g/m ² ) and dry weight of 14.4 g were separated, and after obtaining pulp, carbon disulfide was added thereto. 8 mL, a three-hour mercerizing reaction was carried out in a constant temperature oscillator (170 rpm) having an internal temperature of 20 ° C to prepare a slime fiber solution. Then, 250 mL of the mucus fiber solution was filled in a special filter (10,000 mesh/cm ^{2 of a} stainless steel filter), and the filtrate (mucus fiber solution) was collected in a cylinder of 250 mL. The filtration time (t1) of the filtrate from 25 mL to 50 mL was measured, respectively, and the filtration time (t2) was also performed from 125 mL to 150 mL, and the time difference (t2-t1) was determined. The values are shown in Table 1 based on the above criteria.

As shown in Table 1, the time difference of the time difference (t2-t1) between the filtration time (t1) and the filtration time (t2) of the dissolution slurry composition of the present invention was smaller than that of the comparative example, and the mercerization reaction was promoted.

Claims (6)

A dissolving syrup composition comprising a mercerizing accelerator and a dissolving syrup having a surfactant (A) having an HLB (Oda field method) of 12 to 19 as an essential constituent. The dissolution slurry composition of claim 1, wherein the mercerization promoter comprises a compound selected from the group consisting of: a polyoxyalkylene alkyl compound (A1); and at least one compound having a sulfo group, a sulfooxy group or a phosphonium group (A2) And at least one of the groups of the amphoteric surfactant (A3). A dissolving slurry composition according to claim 1 or 2, which comprises a polyoxyalkylene alkyl compound (A1) as a mercerising accelerator, and a polyoxyalkylene alkyl compound (A1) containing at least one compound represented by the general formula (1) R ¹ [(-OA) _n -OR ² ] _m (1) wherein R ¹ represents a hydrogen atom, an alkyl group having 1 to 30 carbon atoms, an alkenyl group having 2 to 30 carbon atoms, and a carbon number of 2 to 30. a mercapto group or a reaction residue obtained by removing m hydroxyl groups from a polyhydric alcohol; R ² represents a hydrogen atom, an alkyl group having 1 to 30 carbon atoms, an alkenyl group having 2 to 30 carbon atoms or a mercapto group having 2 to 30 carbon atoms; OA represents an oxygen-extended alkyl group having 2 to 4 carbon atoms; n represents an integer of 2 to 100; and m represents an integer of 1 to 6. The dissolving slurry composition according to any one of claims 1 to 3, which further comprises a polyoxyalkylene group compound (B) having an HLB (Oda method) of 1 to 7. The dissolving slurry composition according to any one of claims 1 to 4, wherein the content of the mercerising promoter in the dry weight of the dissolving pulp is 0.01 to 1% by weight. A method for producing a mucilage comprising the step of subjecting a dissolving slurry composition according to any one of claims 1 to 5 to a mercerization (acetonitrile) reaction to obtain an alkali cellulose.