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CN-121991547-A - Sanding slurry capable of being stored for long time and preparation method thereof

CN121991547ACN 121991547 ACN121991547 ACN 121991547ACN-121991547-A

Abstract

The invention relates to sanding slurry capable of being stored for a long time, which comprises, by mass, 20-70% of pigment filler, 0.7-2% of high molecular dispersing agent, 0.4-1% of anionic dispersing agent, 0.1-5% of polyamide wax, 0.21-5% of auxiliary agent, 0.1-2% of talcum powder, 0-10% of solvent and 20-60% of pure water, wherein the mass percentages of the components are 100%. The sanding slurry capable of being stored for a long time is compounded with a high molecular type dispersing agent and an anionic dispersing agent, so that the stability of inorganic filler in the slurry and the compatibility with paint color mixing paste are improved, and the grinding efficiency is increased. It is free of grinding resin, grinds more fully, and increases the grid structure of the slurry system by adding polyamide wax, reducing toner precipitation. The obtained sanding slurry has high stability, can be stored for a long time, has lower grinding fineness, and can bring better paint film performance after being used. The invention also includes a method for preparing the sanding slurry capable of being stored for a long time.

Inventors

  • SUN JIANFU
  • LIU WEI
  • XIA TIANYUAN
  • ZHAO JIE

Assignees

  • 立邦汽车涂料(天津)有限公司

Dates

Publication Date
20260508
Application Date
20241030

Claims (6)

  1. 1. A sanding slurry for long term storage comprising, in mass percent: the total mass percentage of the components is 100 percent.
  2. 2. The long term storable sanding slurry of claim 1 wherein said pigment filler is selected from one of barium sulfate slurry or titanium white slurry.
  3. 3. A sanding slurry storable for long periods of time as claimed in claim 1 wherein the ratio of polymeric dispersant to anionic dispersant is selected from any ratio between 1:1 and 3:1, preferably the ratio of polymeric dispersant to anionic dispersant is 2:1.
  4. 4. The long-term storable sanding slurry of claim 1 wherein said auxiliary agent is selected from one or more of a rheology aid, a defoamer, a pH adjuster, said long-term storable sanding slurry comprising, in mass percent: 0.1 to 2 percent of rheological additive 0.01-2% Of defoaming agent PH regulator 0.1-2% The total mass percentage of the components is 0.21-5%.
  5. 5. The long term storable sanding slurry of claim 1 wherein said solvent is butyl cellosolve.
  6. 6. A method of preparing a sanding slurry storable for a long period of time as claimed in any one of claims 1 to 5 comprising the steps of: S1, sequentially adding pure water, a solvent, a part of high molecular dispersing agent, an anionic dispersing agent, polyamide wax, an auxiliary agent and talcum powder into a stirrer with the rotating speed of 300-700rpm, and continuously stirring for 5-10min; S2, keeping the rotation speed unchanged, continuously adding pigment and filler, increasing the rotation speed to 800-1200rpm, and continuously stirring for 10-15min to obtain uniformly mixed slurry to be ground; s3, transferring the slurry to be ground into a grinder, and grinding the slurry at the rotation speed of 3200-3800rpm, the temperature of less than 40 ℃ and the grinding pressure of less than 0.2MPa to obtain grinding slurry with the fineness of less than 20 mu m; and S4, adding the residual high molecular dispersing agent into the grinding slurry, and grinding again under the conditions that the rotating speed is 3200-3800rpm, the temperature is less than 40 ℃ and the grinding pressure is less than 0.2MPa, so that the sanding slurry capable of being stored for a long time is obtained.

Description

Sanding slurry capable of being stored for long time and preparation method thereof Technical Field The invention relates to the field of paint, in particular to sanding slurry capable of being stored for a long time and a preparation method of the sanding slurry. Background In the field of paint production, sanding slurries are important intermediate products in the production of waterborne basecoat and primer. In the prior art, paint manufacturers generally prepare sanding slurry by uniformly mixing pigment, filler, auxiliary agent, resin and other components according to a certain proportion and then sanding the mixture uniformly by using a sand mill. On the one hand, the production mode can lead to the fact that the sanding slurry cannot be stored for a long time, and needs to be prepared into a middle painting or a primer as soon as possible, and on the other hand, the production process of the product is not easy to control and waste is easily caused because different middle painting or primer needs to be matched with different sanding slurries. In view of the foregoing, there is a need in the art to develop a sanding slurry that can be stored for a long period of time to address the problems associated with the prior art. Disclosure of Invention Based on the facts, the invention aims to provide sanding slurry capable of being stored for a long time, and the sanding slurry is compounded by adopting a high molecular type dispersing agent and an anionic dispersing agent, so that the stability of inorganic filler in the slurry can be improved, the compatibility of the inorganic filler and a paint color mixing paste can be increased, and the grinding efficiency can be improved. It is free of grinding resin, grinds more fully, and increases the grid structure of the slurry system by adding polyamide wax, reducing toner precipitation. The obtained sanding slurry has high stability, can be stored for a long time, has lower grinding fineness, and can bring better paint film performance after being used. In a first aspect, the present invention provides a sanding slurry for long term storage comprising, in mass percent: the total mass percentage of the components is 100 percent. Pigment and filler In the invention, the pigment and filler is selected from one of barium sulfate slurry or titanium white slurry. The sanding slurry containing the barium sulfate slurry or the titanium white slurry can be used for coping with the production of paints or priming paint in different types through the combination of different proportions, so that the number of products of the sanding slurry is reduced, and the production flow is simplified. Polymer type dispersant and anionic dispersant In the invention, the high molecular type dispersing agent can improve the stability of inorganic filler in the grinding slurry, increase the compatibility of the inorganic filler and the paint color mixing paste, and improve the grinding efficiency and stability of the inorganic filler. Preferably, the dosage ratio of the polymeric dispersant to the anionic dispersant is selected from any one of the ratios between 1:1 and 3:1, more preferably, the dosage ratio of the polymeric dispersant to the anionic dispersant is 2:1. Specifically, the high molecular type dispersing agent is selected from dispersing Ultra Px 4575, and the anionic dispersing agent is selected from Disperbx DIC 01. Polyamide wax In the invention, the polyamide wax can form hydrogen bonds with amide bonds and the like in the dispersing agent, thereby playing the roles of increasing the grid structure of the slurry system and reducing the precipitation of toner, and further improving the storage stability of the sanding slurry. Auxiliary agent In the invention, the auxiliary agent is selected from one or more of rheological auxiliary agent, defoamer and pH regulator, and the sanding slurry capable of being stored for a long time comprises the following components in percentage by mass: 0.1 to 2 percent of rheological additive 0.01-2% Of defoaming agent PH regulator 0.1-2% The total mass percentage of the components is 0.21-5%. Specifically, the rheological aid is preferably one or a combination of a rheological aid of LAPONITE RD, fumed silica, available from Pick corporation, and the defoamer is preferably a defoamer of SURFYNOL 104A available from Yingji corporation. Solvent(s) In some embodiments of the invention, the solvent is ethylene glycol butyl ether. In a second aspect, the present invention provides a method of preparing a long-term storable sanding slurry in accordance with the first aspect of the present invention, comprising the steps of: S1, sequentially adding pure water, a solvent, a part of high molecular dispersing agent, an anionic dispersing agent, polyamide wax, an auxiliary agent and talcum powder into a stirrer with the rotating speed of 300-700rpm, and continuously stirring for 5-10min; S2, keeping the rotation speed unchanged, continuously adding