阅读说明：本技术 一种高固体含量羧基丁腈胶乳的制备方法 (Preparation method of high-solid-content carboxylic butyronitrile latex ) 是由 王旭 于 2019-09-11 设计创作，主要内容包括：本发明公开了一种高固体含量羧基丁腈胶乳的制备方法,该高固体含量羧基丁腈胶乳的制备方法由以下原料制成：羧基丁腈橡胶20％-30％、酚醛橡胶15％-25％、乙二酸乙二酯10％-20％、皮脂酸二甲酯5％-15％、有机硅防水剂5％-10％、改性淀粉15％-25％和去离子水5％-15％,本发明提供的一种高固体含量羧基丁腈胶乳的制备方法采用合理的材料配比进行生产加工,并且工艺流程简单容易控制,有助于高效生产,同时通过添加改性淀粉来改善固体含量,有效提高胶乳的质量和性能,有利于改善耐碱和抗氧化效果,有利于推广使用。(The invention discloses a preparation method of high-solid content carboxylic acrylonitrile butadiene latex, which is prepared from the following raw materials: 20-30% of carboxyl nitrile rubber, 15-25% of phenolic rubber, 10-20% of ethanedioic acid ethylene diester, 5-15% of dimethyl sebacate, 5-10% of organic silicon waterproof agent, 15-25% of modified starch and 5-15% of deionized water.)

1. A preparation method of high-solid content carboxylic acrylonitrile butadiene latex is characterized in that: the preparation method of the high-solid-content carboxylic acrylonitrile butadiene latex comprises the following raw materials: 20-30% of carboxyl nitrile rubber, 15-25% of phenolic rubber, 10-20% of ethanedioic acid ethylene diester, 5-15% of dimethyl sebacate, 5-10% of organosilicon waterproofing agent, 15-25% of modified starch and 5-15% of deionized water.

2. The process for the preparation of a carboxylated nitrile latex with high solids content according to claim 1, characterized in that: the method comprises the following steps:

s1, weighing the raw materials according to the mass percentage for later use;

s2, putting the carboxyl nitrile rubber, the phenolic rubber, the ethanedioic acid diester and the dimethyl sebacate into a stirrer, uniformly stirring for 15 to 20 minutes at the speed of 20 to 30 revolutions per minute to obtain a mixed material,

s3, adding deionized water into the mixture, heating to 70-80 ℃, and reacting for 2-3 hours under the condition of heat preservation to obtain a latex;

s4, adding an organic silicon waterproof agent into the latex, and uniformly stirring for 3 to five minutes to obtain mixed latex;

s5, placing the mixed latex into a large container, discharging 20% of the mixed latex into a small container, adding 20% of modified starch, and fully stirring for 2-3 minutes to obtain a first treatment glue solution;

s6, discharging the mixed latex with the weight of 30% again to a small container, adding the modified starch with the weight of 30% and stirring for 3 to 5 minutes to obtain a second treatment glue solution;

s7, adding the residual modified starch into the mixed latex in the large container, and fully stirring for 10 to 12 minutes to obtain a third treated glue solution;

and S8, adding the second processing glue solution into the third processing glue solution, and uniformly stirring for 5 to 8 minutes to obtain the carboxylated nitrile latex with high solid content.

3. The process for the preparation of a carboxylated nitrile latex with high solids content according to claim 2, characterized in that: and the step S1 also comprises the step of crushing the solid raw material, wherein the mesh number is 600-800 meshes.

4. The process for the preparation of a carboxylated nitrile latex with high solids content according to claim 2, characterized in that: and the step S3 further comprises the step of preheating when deionized water is added, wherein the temperature of the rest people is 50-55 ℃.

5. The process for the preparation of a carboxylated nitrile latex with high solids content according to claim 2, characterized in that: the 20% component and the 30% component of the S5 step and the S6 step are percentage components of the total content.

6. The process for the preparation of a carboxylated nitrile latex with high solids content according to claim 1, characterized in that: the modified starch is oxidized esterified modified starch.

7. The process for the preparation of carboxylated nitrile latex with high solids content according to claim 6, characterized in that: the oxidized esterified starch comprises 50-70% of starch, 3-8% of nano cellulose catalyst, 10-20% of sodium hypochlorite oxidant and 20-30% of acetate esterifying agent, and the preparation method comprises the following steps:

p1, selecting one of corn starch or sweet potato starch, adding a nano-cellulose catalyst and a sodium hypochlorite oxidant, and carrying out oxidation reaction to obtain oxidized starch;

p2, mixing oxidized starch with an acetic ester esterifying agent for esterification reaction to obtain an oxidized esterification mixture;

and P3, filtering the oxidized and esterified mixture, and removing impurities to obtain the oxidized and esterified modified starch.

8. The process for the preparation of a carboxylated nitrile latex with a high solids content according to claim 7, characterized in that: the oxidation reaction in the step P1 and the esterification reaction in the step P2 are both carried out under alkaline conditions, and the pH is 9-11.

9. The process for the preparation of a carboxylated nitrile latex with a high solids content according to claim 7, characterized in that: the temperature of the oxidation reaction in the step P1 and the esterification reaction in the step P2 are both 20-40 ℃.

Technical Field

The invention relates to the technical field of butyronitrile latex, in particular to a preparation method of high-solid-content carboxylic butyronitrile latex.

Background

In the current industrial production, the application of the carboxylated nitrile latex is very wide, so that the large-scale efficient production is required.

However, the existing preparation method of the carboxyl-jacking latex is complex and is not beneficial to stable and efficient production, and the existing method has unreasonable material configuration, low solid content of the latex and undesirable use effect and needs to be improved for production.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a preparation method of high-solid-content carboxylic acrylonitrile butadiene latex.

In order to achieve the purpose, the invention adopts the following technical scheme:

a preparation method of high-solid content carboxylic acrylonitrile butadiene latex is prepared from the following raw materials: 20-30% of carboxyl nitrile rubber, 15-25% of phenolic rubber, 10-20% of ethanedioic acid ethylene diester, 5-15% of dimethyl sebacate, 5-10% of organosilicon waterproofing agent, 15-25% of modified starch and 5-15% of deionized water.

Preferably, the method comprises the following steps:

s1, weighing the raw materials according to the mass percentage for later use;

s2, putting the carboxyl nitrile rubber, the phenolic rubber, the ethanedioic acid diester and the dimethyl sebacate into a stirrer, uniformly stirring for 15 to 20 minutes at the speed of 20 to 30 revolutions per minute to obtain a mixed material,

s3, adding deionized water into the mixture, heating to 70-80 ℃, and reacting for 2-3 hours under the condition of heat preservation to obtain a latex;

s4, adding an organic silicon waterproof agent into the latex, and uniformly stirring for 3 to five minutes to obtain mixed latex;

s5, placing the mixed latex into a large container, discharging 20% of the mixed latex into a small container, adding 20% of modified starch, and fully stirring for 2-3 minutes to obtain a first treatment glue solution;

s6, discharging the mixed latex with the weight of 30% again to a small container, adding the modified starch with the weight of 30% and stirring for 3 to 5 minutes to obtain a second treatment glue solution;

s7, adding the residual modified starch into the mixed latex in the large container, and fully stirring for 10 to 12 minutes to obtain a third treated glue solution;

and S8, adding the second processing glue solution into the third processing glue solution, and uniformly stirring for 5 to 8 minutes to obtain the carboxylated nitrile latex with high solid content.

Preferably, the step S1 further includes crushing the solid raw material, wherein the mesh number is 600 to 800 meshes.

Preferably, the step S3 further includes preheating while adding deionized water, and the remaining temperature is 50 to 55 ℃.

Preferably, the 20% component and the 30% component of the steps S5 and S6 are percentage components of the total content.

Preferably, the modified starch is an oxidized esterified modified starch.

Preferably, the oxidized esterified starch comprises 50% -70% of starch, 3% -8% of nano cellulose catalyst, 10% -20% of sodium hypochlorite oxidant and 20% -30% of acetate esterifying agent, and the preparation method comprises the following steps:

p1, selecting one of corn starch or sweet potato starch, adding a nano-cellulose catalyst and a sodium hypochlorite oxidant, and carrying out oxidation reaction to obtain oxidized starch;

p2, mixing oxidized starch with an acetic ester esterifying agent for esterification reaction to obtain an oxidized esterification mixture;

and P3, filtering the oxidized and esterified mixture, and removing impurities to obtain the oxidized and esterified modified starch.

Preferably, the oxidation reaction in the step P1 and the esterification reaction in the step P2 are both carried out under alkaline conditions, and the pH is 9-11.

Preferably, the temperature of the oxidation reaction in the step P1 and the temperature of the esterification reaction in the step P2 are both 20-40 ℃.

The preparation method of the high-solid-content carboxylic acrylonitrile-butadiene latex provided by the invention adopts reasonable material proportion for production and processing, has simple and easily controlled process flow, is beneficial to high-efficiency production, improves the solid content by adding the modified starch, effectively improves the quality and performance of the latex, is beneficial to improving the alkali resistance and oxidation resistance effects, and is beneficial to popularization and use.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

A preparation method of high-solid content carboxylic acrylonitrile butadiene latex is prepared from the following raw materials: 20-30% of carboxyl nitrile rubber, 15-25% of phenolic rubber, 10-20% of ethanedioic acid ethylene diester, 5-15% of dimethyl sebacate, 5-10% of organosilicon waterproofing agent, 15-25% of modified starch and 5-15% of deionized water.

Preferably, the method comprises the following steps:

s1, weighing the raw materials according to the mass percentage for later use;

s2, putting the carboxyl nitrile rubber, the phenolic rubber, the ethanedioic acid diester and the dimethyl sebacate into a stirrer, uniformly stirring for 15 to 20 minutes at the speed of 20 to 30 revolutions per minute to obtain a mixed material,

s3, adding deionized water into the mixture, heating to 70-80 ℃, and reacting for 2-3 hours under the condition of heat preservation to obtain a latex;

s4, adding an organic silicon waterproof agent into the latex, and uniformly stirring for 3 to five minutes to obtain mixed latex;

s5, placing the mixed latex into a large container, discharging 20% of the mixed latex into a small container, adding 20% of modified starch, and fully stirring for 2-3 minutes to obtain a first treatment glue solution;

s6, discharging the mixed latex with the weight of 30% again to a small container, adding the modified starch with the weight of 30% and stirring for 3 to 5 minutes to obtain a second treatment glue solution;

s7, adding the residual modified starch into the mixed latex in the large container, and fully stirring for 10 to 12 minutes to obtain a third treated glue solution;

and S8, adding the second processing glue solution into the third processing glue solution, and uniformly stirring for 5 to 8 minutes to obtain the carboxylated nitrile latex with high solid content.

Preferably, the step S1 further includes pulverizing the solid raw material, wherein the mesh number is 600 to 800 meshes.

Preferably, the step S3 further includes preheating while adding deionized water, wherein the temperature of the rest is 50 to 55 ℃.

Preferably, the 20% component and the 30% component of the steps S5 and S6 are percentage components of the total content.

Preferably, the modified starch is an oxidized esterified modified starch.

Preferably, the oxidized esterified starch comprises 50% -70% of starch, 3% -8% of nano cellulose catalyst, 10% -20% of sodium hypochlorite oxidant and 20% -30% of acetate esterifying agent, and the preparation method comprises the following steps:

p1, selecting one of corn starch or sweet potato starch, adding a nano-cellulose catalyst and a sodium hypochlorite oxidant, and carrying out oxidation reaction to obtain oxidized starch;

p2, mixing oxidized starch with an acetic ester esterifying agent for esterification reaction to obtain an oxidized esterification mixture;

and P3, filtering the oxidized and esterified mixture, and removing impurities to obtain the oxidized and esterified modified starch.

Preferably, the oxidation reaction in the step P1 and the esterification reaction in the step P2 are both carried out under alkaline conditions, and the pH is 9 to 11.

Preferably, the oxidation reaction in the step P1 and the esterification reaction in the step P2 are both at 20-40 ℃.

The preparation method of the high-solid-content carboxylic acrylonitrile-butadiene latex provided by the invention adopts reasonable material proportion for production and processing, has simple and easily controlled process flow, is beneficial to high-efficiency production, improves the solid content by adding the modified starch, effectively improves the quality and performance of the latex, is beneficial to improving the alkali resistance and oxidation resistance effects, and is beneficial to popularization and use.