JPS61195138A - Easily water dispersible and soluble high polymer substance and production thereof - Google Patents

Abstract

PURPOSE:A easily water dispersible and soluble high polymer substance composition, obtained by heat-treating a mixture of a water-soluble high polymer substance and an organosilane compound (partial hydrolyzate condensate), spraying an aqueous solution of a surface active agent, and drying the mixture. CONSTITUTION:(A) 100pts.wt. water-soluble high polymer substance, e.g., cellu lose ether suh as methyl cellulose, hydroxypropylmethyl cellulose, etc. is blended with (B) 0.1-3pts.wt. organosilane compound shown by the formula RSi(X)3 (R is 1-10C monofunctional hydrocarbon; X is hydrolyzable organic group, such as alkoxy, or acyloxy) or its partial hydrolyzate condensate directly or after diluting it with an organic solvent, heat-treated, and sprayed with (C) 0.5-7pts.wt. surface active agent, preferably alkyl sulfate or polyoxyethylene nonyl phenyl ether as an aqueous solution, to give the aimed composition.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a waterfowl dispersion/soluble polymer substance composition and a method for producing the same. The object of the present invention is to provide a composition that smoothly disperses and dissolves without forming any lumps even when directly poured into water, and becomes a complete aqueous solution.

(Prior art) Conventionally, in order to dissolve water-soluble polymer substances such as cellulose ether in water, direct injection has a strong affinity with water;
When powder gets wet with water, the surface of the particles is immediately covered with a highly adhesive liquid, preventing water from penetrating and causing lumps.1.
A method of dispersing it in hot water, cooling it, and stirring it takes advantage of its thermal gelation properties.

On the other hand, it is known to treat cellulose ether etc. with glyoxal, which can be dispersed in neutral to acidic water and dissolved by making it alkaline after dispersion. If glyoxal is directly added to alkaline water, it will decompose and form lumps, so the desired smooth dispersion and dissolution will not occur.

The reason why a water-soluble polymer substance (powder) such as cellulose ether is added to water causes lumps to form.As mentioned above, when the powder gets wet with water, the surface of the particle is immediately covered with a highly sticky liquid, and the water becomes sticky. This is because the particles do not penetrate into the particles. In order to delay the wetting of this water-soluble polymer substance with water, treatment with silicone water repellent agents, silane coupling agents, silicone crosslinking agents, etc. can be considered, but these treatments alone will not produce a strong water repellent effect. As a result, the treated powder floats on the water surface and is difficult to dissolve. On the other hand, even if powder particles are treated with various surfactants in hopes of improving their dispersibility in water, satisfactory solubility cannot be achieved.

(Structure of the Invention) The present inventors have conducted extensive research to solve these conventional disadvantages, and have found that by using a special wetting retardant and a surfactant in combination, a synergistic effect of the two components is exhibited. The present invention was completed based on the discovery that a significantly superior treatment effect on dispersion solubility can be achieved.

That is, the present invention includes (a) 100 parts by weight of a water-soluble polymeric substance (b)
General formula R31(X) Φ-- (1) (R in the formula
is a monovalent hydrocarbon group having 1 to 10 carbon atoms, and X is a hydrolyzable organic group) 0.1 to 3 parts by weight of an organic silane compound or a partially hydrolyzed condensate thereof; and (iii) a surfactant. The present invention relates to a waterfowl-dispersed/soluble polymer material composition containing 0.5 to 7 parts by weight and a method for producing the same.

The polymer substance composition according to the present invention can be directly dispersed and dissolved in a wide range of water ranging from acidic to alkaline (including paints and emulsions that do not aggregate cellulose ether, etc., and solutions and suspensions of other organic or inorganic substances). can be done. Therefore, unlike the glyoxal-treated cellulose ether described above, it is not necessary to take the trouble of changing the pH to alkaline after dispersing it in water to dissolve it.

The present invention will be explained in more detail below.

(a) Water-soluble polymeric substances targeted by the present invention include various cellulose ethers such as methylcellulose, hydroxypropylmethylcellulose, hydroxyethylethylcellulose, hydroxyethylcellulose, and hydroxypropylcellulose, as well as polyvinyl alcohol and carboxymethylcellulose. , starch, casein, as well as powder emulsions and various water-soluble derivatives thereof.

Finally, the (oral) component used in the present invention is an important component in the present invention, as it functions to retard the wettability of the water-soluble polymeric substance described above to water. R in the general formula (1) is exemplified by a monovalent hydrocarbon group having 1 to 10 carbon atoms, such as a methyl group, an ethyl group, a propyl group, and a phenyl group. In addition, X in the formula is a hydrolyzable organic group, such as an acyloxy group such as a methoxy group or an ethoxy group, an acyloxy group represented by the formula -0COR (R is an alkyl group), or a formula -0NC(R)(R')( R in the formula,
A ketooxime group represented by R' is an alkyl group is exemplified.

The above-mentioned (mouth) components have the property of being easily partially hydrolyzed and condensed by moisture in the air, and such partially hydrolyzed condensates can also be effectively used in the present invention.

Component (b) is 0.1 per 100 parts by weight of component (a).
It is desirable to use the amount in the range of ~3 parts by weight (preferably 0.5 to 2 parts by weight). If it is less than 0.1 part by weight, the effect of retarding the wettability will be small, while if it is added more than 3 parts by weight, it will not cause dispersion. Solubility cannot be further improved.

The object of the present invention cannot be achieved with the above-mentioned (1) component alone; furthermore, by using (3) a surfactant, it is possible to easily and quickly obtain dispersion and solubility. Various types of surfactants can be used, but alkyl sulfates and polyoxyethylene nonylphenyl ether are particularly preferred.

Component (c) is 0.5 per 100 parts by weight of component (a).
It is desirable to use it in the range of ~7 parts by weight (preferably 1 to 5 parts by weight).If the amount of O,S is less than 1 part by weight, the effect of improving dispersion will be small; effect cannot be obtained.

(b) The addition and blending of the (b) component to the water-soluble polymeric substance is carried out by uniformly adding and mixing a predetermined amount of the (b) component either directly or diluted with an appropriate organic solvent.
It is desirable not only to simply mix but also to heat-treat in the presence of a small amount of water (for example, at 100°C for about 1 hour). By performing this heat-treating, combined with the addition of a surfactant, the dispersion and solubility are even better. An improvement effect can be obtained.

(c) It is preferable to add the surfactant after the above heat treatment rather than at the same time as the above (b) component. In other words, after the addition of the (b) component is completed, a predetermined amount of an aqueous solution of the surfactant is sprayed. By drying (for example, at 100° C. for about 1 hour), the desired water-easily dispersible and soluble polymeric substance can be obtained.

Next, specific examples will be given. However, the following abbreviations are used for each side below.

[Cellulose ether] o 90SH3000: Hydroxypropyl methyl cellulose manufactured by Shin-Etsu Chemical Co., Ltd., 2% aqueous solution viscosity of approximately 30,000 cps (25°C) o 90SH3000: @ Hydroxypropyl methylcellulose manufactured by Etsu Chemical Co., Ltd., 2% aqueous solution viscosity of approximately 3000 cps (25℃) o 65SH4000: Shin-Etsu Chemical Co., Ltd. hydroxypropyl methyl cellulose, 2% aqueous solution viscosity of about 4000 cps (25℃) osM-4000: Shin-Etsu Chemical Co., Ltd. methylcellulose, 2% aqueous solution viscosity 4000 cps (25℃) [Organosilane Compound] O silane compound C: [Surfactant] a DBS-Na: I'7'' Sodium sylbenzene sulfonate oNs-208= Polyoxyethylene nonylphenyl ether oLS-Ha: Sodium lauryl sulfate Example 1 Table 1 As shown, cellulose ether (powder) 10
0 g K and 2 g of an organic silane compound were added as a solution, mixed uniformly, and heat-treated at 100° C. for 1 hour. Next, 4 g of a surfactant was sprayed as an aqueous solution onto this material and dried at 100° C. for 1 hour. - When the composition thus obtained was subjected to a dissolution test in water, the results shown in Table 1 were obtained. The table also includes comparative data.

[Dissolution test] 300mJl)-Pour 1000mJL of water into a ruby car,
Attach a stirrer and rotate the stirring blade at 1100 rpm, and add 2g (1%) or 4g of the sample here.
(2%) and examined the dispersion and solubility.

◎ Good dispersion and solubility ○ Good dispersion and solubility, but slight lumps may occur △ Small amount of lumps produced The addition treatment was carried out in the same manner as in the previous example, except that the amount added, heating and drying conditions were as shown in Table 2, and a dissolution test was conducted. However, the heating temperature and time when adding the organic silane compound,
The drying temperature and time when adding the surfactant were the same.

The results were as shown in Table 2.

Example 3 Experiment No. 11 in Table 1 above. The heat-dried cellulose ethers obtained in Experiments No. 20 and 20 in Table 2 were put into an aqueous solution having the properties shown in Table 3 for a dissolution test.

The results were as shown in Table 3.

Table 3 gVA emulsion: Ethylene-vinyl acetate copolymer emulsion, solid content 25%

Claims (1)

[Claims] 1. (a) 100 parts by weight of a water-soluble polymeric substance (b) General formula RSi(X)_3 (R in the formula is a monovalent hydrocarbon group having 1 to 10 carbon atoms, and X is a monovalent hydrocarbon group having 1 to 10 carbon atoms; Hydrolyzable organic group) or a partially hydrolyzed condensate thereof (0.1 to 3 parts by weight) and (iii) a surfactant with high water dispersibility and solubility. Molecular substance composition. 2. The composition according to claim 1, wherein the water-soluble polymeric substance is cellulose ether. 3. R in the above general formula is a methyl group, and X is -OCH_
3. The composition according to claim 1, which is -OCOCH_3 or -ONC(CH_3)(C_2H_5). 4. The composition according to claim 1, wherein the surfactant is an alkyl sulfate or polyoxyethylene nonylphenyl ether. 5. To 100 parts by weight of a water-soluble polymer substance, add the general formula RSi (
X)_3 (in the formula, R is a monovalent hydrocarbon group having 1 to 10 carbon atoms, X is a hydrolyzable organic group) or a partially hydrolyzed condensate thereof, to 0.1 to 3
A method for producing a water-readily dispersible and soluble polymeric substance 6, characterized in that the water-soluble polymeric substance is a cellulose ether, the method comprising adding parts by weight, heating, and then spraying an aqueous solution of a surfactant and drying the patent. The composition according to claim 5. 7. R in the above general formula is a methyl group, and X is -OCH_
3. The composition according to claim 5, which is -OCOCH_3 or -ONC(CH_3)(C_2H_5). 8. The composition according to claim 5, wherein the surfactant is an alkyl sulfate or polyoxyethylene nonylphenyl ether.