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A tire casting gypsum powder containing sulfonated melamine formaldehyde resin water reducing agent and its preparation method

A technology of sulfonated melamine and formaldehyde resin, which is applied in the field of tire casting, can solve the problems of reduced water reducing rate of resin water reducer, poor fluidity and dispersion, and unstable resin performance, etc., and achieves improved sulfonation rate, good dispersibility, The effect of molecular weight stabilization

Active Publication Date: 2016-01-20
SHANDONG ZHANHUA OSITER CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current synthesis process itself has the following problems: (1) It is difficult to control the molecular weight of the reaction, and it is difficult to accurately control the molecular weight of the reaction product during the reaction; (2) The stability of the resin is poor, and the performance of the obtained resin is unstable. During the process, the water reducing rate of the resin water reducing agent is greatly reduced; (3) Poor adaptability to gypsum slurry, poor fluidity and dispersion in gypsum static slurry, which affects the performance of gypsum powder

Method used

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  • A tire casting gypsum powder containing sulfonated melamine formaldehyde resin water reducing agent and its preparation method

Examples

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Effect test

Embodiment 1

[0014] The sulfonated melamine formaldehyde resin water reducer comprises the following raw materials: melamine, liquid formaldehyde and water, wherein the weight ratio of melamine, liquid formaldehyde and water is 10:25:7.

[0015] The preparation of the sulfonated melamine-formaldehyde resin water-reducer comprises the following steps: first mixing melamine, liquid formaldehyde and water at a weight ratio of 10:25:7 to obtain a mixture, and then adjusting the pH value to 9.0 with sodium hydroxide solution , heat up to 40°C, keep warm and react for 60 minutes; add sodium metabisulfite after reacting for 60 minutes, wherein the weight ratio of sodium metabisulfite to the mixture is 1:4, sodium metabisulfite must be added slowly, and the time is controlled within 10 minutes. Use liquid caustic soda to adjust the pH value to 11, heat preservation and sulfonation reaction at 85°C for 90 minutes and then start to cool down; when the temperature drops to 50°C, add hydrochloric acid ...

Embodiment 2

[0017] The sulfonated melamine formaldehyde resin water reducer comprises the following raw materials: melamine, liquid formaldehyde and water, wherein the weight ratio of melamine, liquid formaldehyde and water is 20:52:15.

[0018] The preparation of the sulfonated melamine formaldehyde resin water reducer comprises the following steps: firstly mix melamine, liquid formaldehyde and water at a weight ratio of 20:52:15 to obtain a mixture, then adjust the pH value to 9.5 with sodium hydroxide solution , heat up to 45°C, heat preservation reaction for 60 minutes; add sodium metabisulfite after 60 minutes of reaction, wherein the weight ratio of sodium metabisulfite to the mixture is 1:4, adjust the pH value to 11 with liquid caustic soda, and keep warm at 88°C After 90 minutes of sulfonation reaction, start to cool down; when the temperature drops to 50°C, add hydrochloric acid to adjust the pH value to 4; after 30 minutes, add liquid caustic soda to adjust the pH value to 9; th...

Embodiment 3

[0020] The sulfonated melamine formaldehyde resin water reducer comprises the following raw materials: melamine, liquid formaldehyde and water, wherein the weight ratio of melamine, liquid formaldehyde and water is 15:35:9.

[0021] The preparation of the sulfonated melamine-formaldehyde resin water-reducer comprises the following steps: first mixing melamine, liquid formaldehyde and water at a weight ratio of 15:35:9 to obtain a mixture, and then adjusting the pH value to 10.0 with sodium hydroxide solution , heat up to 50°C, heat preservation reaction for 60 minutes; add sodium metabisulfite after 60 minutes of reaction, wherein the weight ratio of sodium metabisulfite to the mixture is 1:4, adjust the pH value to 11 with liquid caustic soda, and keep warm at 90°C After 90 minutes of sulfonation reaction, start to cool down; when the temperature drops to 50°C, add hydrochloric acid to adjust the pH value to 4; after 30 minutes, add liquid caustic soda to adjust the pH value t...

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Abstract

The invention belongs to the technical field of resin and particularly relates to tire casting gypsum powder containing a sulfonated melamine formaldehyde resin water reducing agent and a preparation method of the tire casting gypsum powder. The tire casting gypsum powder containing the sulfonated melamine formaldehyde resin water reducing agent comprises raw materials of quartz, gypsum, water and the sulfonated melamine formaldehyde resin water reducing agent. Formaldehyde resin in the tire casting gypsum powder containing the sulfonated melamine formaldehyde resin water reducing agent is stable in molecular weight, and is favorable in dispersion for the gypsum powder and is high in water reducing rate in the tire casting application.

Description

technical field [0001] The invention belongs to the technical field of tire casting, and in particular relates to tire casting gypsum powder containing sulfonated melamine formaldehyde resin water reducer and a preparation method thereof. Background technique [0002] The use of gypsum powder in the casting of automobile tires can correctly reproduce the complex structure of the tire, but generally the existing gypsum powder is dehydrated during the drying process, and the cracks will increase due to the increase of linear shrinkage, which is not conducive to the molding of tire casting. The addition of sulfonated melamine formaldehyde resin water reducer can effectively improve the gypsum powder. [0003] Sulfonated melamine formaldehyde resin superplasticizer (SMF for short) is a water-soluble ionic polymer that plays an important role in industry. The current synthesis process itself has the following problems: (1) It is difficult to control the molecular weight of the r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14
Inventor 赵超涛杜维乾赵锡斌
Owner SHANDONG ZHANHUA OSITER CHEM
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