JPS58197396A - Papermaking size composition - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sizing agent composition for paper manufacturing. In addition to rosin-based sizing agents, various synthetic sizing agents have been proposed as sizing agents for paper manufacturing. For example, Tokko Showa 5'5-56044
The substituted cyclic dicarboxylic anhydride disclosed in the above publication is a neutral sizing agent, and is one of the promising sizing agents since it has advantages such as a short time to develop a sizing effect and low cost. However, there are problems with the stability and hydrolysis resistance of this sizing agent emulsion.

An object of the present invention is to provide a paper sizing agent composition that solves these problems.

The present invention is a paper sizing composition containing a substituted cyclic dicarboxylic anhydride, an emulsifier, and an amine.

The substituted cyclic dicarboxylic acid anhydride used in the present invention is represented by the formula F.

(In the formula, R is a dimethylene group or a trimethylene group, and R' is an alkyl, alkenyl, aralkyl, or aralkenyl group, and represents a group having 5 or more carbon atoms.) (In the formula, horse and R2 are (Indicates an alkyl group having 4 to 10 carbon atoms.) Specific examples of compounds represented by the L-formula I and (7) isooctadecenyl succinic anhydride, n-hexadeceryl succinic anhydride, Dodecylconophosphate anhydride.

Examples include triisobutenylsuccinic anhydride. Further, specific examples of the compound represented by the formula (1) include (1-octyl-2-decenyl)-7 group anhydride, (1-hexyl-2-octenyl) fuhaku anhydride, and the like.

Next, as the emulsifier, a nonionic emulsifier is preferable, and this emulsifier may be used alone, or in combination with other emulsifiers,
For example, it may be used in combination with anionic emulsifiers, cationic emulsifiers, etc. Any known nonionic emulsifier can be used, such as polyoxyethylene alkyl ether, ? Lyoxyethylene alkylphenyl ether, polyoxyethylene aralkylphenyl 1-
Polyoxyethylene ether emulsifiers such as ester, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbitol fatty acid ester, etc. Examples include 1: lyoxyethylene fatty acid ester, glycerin fatty acid ester, oxyethylene oxypropylene block copolymer, and the like. Among these, polyoxyethylene polyaralkyl phenyl ether represented by the following formula is particularly preferred.1. stomach.

Yes, mke1~51!1IFi1o~8o. ) Examples of anionic emulsifiers include sodium polyoxyethylene alkyl ether sulfate, sodium polyoxyethylene alkyl phenyl ether sulfate, sodium alkyl sulfate; examples of phoroxythithione emulsifiers include lauryl trimedelammonium chloride and steari A. -) IJ medylammonium chloride, distearyldimethylammonium chloride, alkylbenzyldimethylammonium chloride, etc.

The amines used in the present invention include alkyl amines and alkyl diamines, and these are represented by the following formula (t).

FINH,, R, R, ltH, RIB-3N (Here, I'll, ff1t indicates an alkyl group having 1 to 6 carbon atoms.) R2H, N (Yamagami NR, R, (Here, horse, horse, f
f4t:j indicates an alkyl group having 1 to 6 carbon atoms, and n is 1 to 4. ) In the sizing composition of the present invention, the blending ratio of each component is 1 part substituted cyclic dicarboxylic anhydride.

Emulsifier 05-20 @ part, 7 min 01-2 per nail most part
0-fold twill is suitable. If both the emulsifier and the amine are more than the amount listed above, the emulsifier remaining after paper making will be 1. The hydrophilicity of I and amines results in a low size effect, and if the amount is too small, the emulsifying power will not be sufficient. Note that the method of blending each component is not particularly limited.

The sizing composition of the present invention can be emulsified by various methods such as phase inversion emulsification and forced emulsification using a homogenizer, but phase inversion emulsification is particularly suitable. If an emulsifier with a high HLE value (approximately 16 to 18) is useful, phase inversion emulsification is preferred. When using an emulsifier with a low L<, ARRP value (approximately 12 to 15), forced emulsification with a homogenizer is preferred8. The sizing agent of the present invention Paper making using the composition may be carried out in exactly the same manner as when using known sizing agents.

According to the present invention, the stability of the sizing emulsion is very improved, and the sizing effect is less reduced when sizing is performed after the emulsion is left for a long time.1. Further, one of the features of the present invention is that the size performance is improved and a sufficient size effect can be exhibited even at a low concentration.

Next, the present invention will be explained in detail by way of examples.

Example 1 500p of inbutylene polymer with an average carbon value of &14.5 and 12L6f of maleic anhydride were poured into a 1 volume autoclave and reacted for 5 hours at 210°C under an inert atmosphere. Unreacted substances were separated to obtain 2601 substituted cyclic dicarboxylic acid anhydride. The saponification value F′i of this thing! 196
■It was KOVt.

This substituted cyclic dicarboxylic acid anhydride 10P has an HLB value of 1
7.2km Adjusted emulsifier A rL4f (HI, mixture 1 of polyoxyethylene aralkylphenyl ether 265% by weight with a B value of 14.7 and polyoxyethylene 75alkylphenyl ether 755% by weight with an HLB value of 111 LI and triethylamine 11F) were mixed for 5 minutes at 70 to 80°C under a nitrogen gas atmosphere.Then, the mixture was cooled to a temperature below room temperature, and then water was gradually added while stirring to form a phase inversion emulsification (approximately 20% by weight once). This was diluted with water to prepare a 5% sizing emulsion, and the paper was sampled at regular intervals at room temperature for sizing, and the change in sizing over time was measured.The results are shown in Figure 1. 1. The sizing was performed by the following method.

Beating degree 4251117 (JIS F812M Canada-
Semi-type ← - Yoru) y, BKp pulp (concentration cts%) slurry was mixed with ten sizing agent emulsions [
7.055 weight, 25% calcium carbonate, 118% cationic starch, cationic polyacrylamide [1,
Add 0.3%, stir to disperse uniformly, and then use a paper machine (according to JIS P8209) to make 160 tsubo
The paper was made so that the paper was dry at 110°C for 5 minutes, and then kept at a constant temperature and humidity of 20°C and 65% RB for 24 hours. In this way, The size of the obtained product was evaluated by the Stekicht method (JIS P8122).

Example 2 The same emulsifier A as in Example 1 was used as an emulsifier [L4i and cationic emulsifier (lauryltrimethylene ammonium chloride) α1? A sizing agent emulsion was prepared in the same manner as in Example 1 except that a sizing agent emulsion was used, and the sizing effect was measured. The results are shown in Figure 1.

Example 5 Anionic emulsifier (t: sodium lyoxyethylene alkyl ether sulfate) α11 instead of cationic emulsifier
A sizing agent emulsion was prepared in exactly the same manner as in Example 2 except that the sizing agent emulsion was used, and the sizing effect was measured. The results are shown in Figure 1.

Example 4 Adding sizing emulsion to pulp at cL2/weight lI
The paper was sized using L5 in the same manner as in Example 1, except that 157% and (157) were added in a double layer, and the sizing degree was measured.

Example 5 Paper was sized and the degree of sizing was measured in the same manner as in Example 2, except that the amount of the sizing emulsion added to the pulp was changed to α2 weight and ns weight. The results are shown in Table 1.

Example 6 The amount of sizing emulsion added to pulp was 112
The paper was sized in the same manner as in Example 5, except that the weight percent and α5 weight were changed to 1%, and the degree of sizing was measured. The results are shown in Table 1.

Comparative Example 1 Example 1 except that triethylamine was not added.
The size effect was evaluated in the same manner as above. The results are shown in Table 2.

Comparative Example 2 Example 2 except that triethylamine was not added
The size effect was evaluated in the same manner as above. The results are shown in Table 2.

Comparative Example 5 Example 5 except that triethylamine was not added.
The size effect was evaluated in the same manner as above. The results are shown in the second page.

Comparative Example 4 Same as Comparative Example 1 and 41 (1,000 sizing agent emulsilane was added!#
1 made, f12 heavy fist% and 05 for this luxurious pulp
The size effect was evaluated by adding 1% by weight. The results are shown in Table 3.

Comparative Example 5 A sizing agent emulsion was prepared in the same manner as in Comparative Example 2,
This was added to the pulp by tt2 weight and [1,3 weight]6, and the size effect was evaluated. The results are shown in Table 5.

Comparative Example 6 A sizing agent emulsion was prepared in the same manner as in Comparative Example 5,
This was added to the valve in an amount of 1% α2 weight (13% by weight), and the size effect was evaluated. The results are shown in Table 5.

Table S

[Brief explanation of drawings]

FIG. 1 is a graph showing the stability of the sizing agent emulsion over time. Patent applicant Idemitsu Kosan Co., Ltd.

Claims (1)

[Claims] A paper sizing composition containing a substituted cyclic dicarboxylic acid anhydride, an emulsifier, and an amine.