阅读说明：本技术 一种农药分散剂 (Pesticide dispersant ) 是由 戴时钧 缪静 刘发龙 于 2019-11-04 设计创作，主要内容包括：本发明属于分散剂领域,具体涉及一种农药分散剂,由以下重量百分比的组分组成：聚羧酸类分散剂10-35％、聚醚改性聚硅氧烷4-8％、醋酸乙酯20-30％、苯磺酸10-20％,CMC 6-10％,其余为水；所述聚羧酸类分散剂为丙烯酸-(甲基)丙烯酸共聚酯；所述聚羧酸类分散剂分子量分布范围为10000-100000。采用本发明的有益效果是：该农药用分散剂无毒无害,对pH值以及温度等敏感程度小,分散稳定性高,不易出现沉降和絮凝；聚羧酸类分散剂提高了固体颗粒的含量,显著降低分散体系粘度,在高固含量下具有较好的流动性,降低了原料成本,减少设备磨损。(The invention belongs to the field of dispersants, and particularly relates to a pesticide dispersant, which comprises the following components in percentage by weight: 10-35% of polycarboxylic acid dispersant, 4-8% of polyether modified polysiloxane, 20-30% of ethyl acetate, 10-20% of benzenesulfonic acid, 6-10% of CMC, and the balance of water; the polycarboxylic acid dispersant is acrylic acid- (methyl) acrylic acid copolyester; the molecular weight distribution range of the polycarboxylic acid dispersant is 10000-100000. The beneficial effects of the invention are as follows: the dispersant for the pesticide is non-toxic and harmless, has small sensitivity degree on pH value, temperature and the like, has high dispersion stability, and is not easy to settle and flocculate; the polycarboxylic acid dispersant improves the content of solid particles, obviously reduces the viscosity of a dispersion system, has better fluidity at high solid content, reduces the cost of raw materials and reduces the abrasion of equipment.)

1. The dispersant for the pesticide is characterized by comprising the following components in percentage by weight: 10-35% of polycarboxylic acid dispersant, 4-8% of polyether modified polysiloxane, 20-30% of ethyl acetate, 10-20% of benzenesulfonic acid, 6-10% of CMC, and the balance of water.

2. The dispersant for agricultural chemicals according to claim 1, wherein the polycarboxylic acid dispersant is acrylic acid- (meth) acrylic acid copolyester.

3. The dispersant for agricultural chemicals according to claim 1, wherein the polycarboxylic acid dispersant is prepared by graft copolymerization of different unsaturated monomers.

4. The dispersant for agricultural chemicals as claimed in claim 2, wherein the molecular weight distribution range of the polycarboxylic acid dispersant is 10000-100000.

5. The dispersant for agricultural chemicals as claimed in claim 2, wherein said polycarboxylic acid dispersant comprises a hydrophobic group and a hydrophilic group, said hydrophobic group has a molecular weight of 5000-7000 and said hydrophilic group has a molecular weight of 3000-5000.

6. The dispersant for agricultural chemicals according to claim 4, wherein the proportion of the hydrophilic portion in the segment of the polycarboxylic acid-based dispersant is 20 to 40%.

7. The dispersant for the pesticide is characterized by comprising the following components in percentage by weight: 25% of polycarboxylic acid dispersant, 6% of polyether modified polysiloxane, 25% of ethyl acetate, 15% of benzenesulfonic acid, 5% of CMC and the balance of water.

Technical Field

The invention belongs to the field of dispersants, and particularly relates to a pesticide dispersant.

Background

Dispersants are primarily chemical agents that lower the viscosity of the cement slurry, which are typically surfactants. They can be broadly classified as anionic, cationic and nonionic. To reduce the force with which solids are mixed into liquids, dispersants have been widely used in systems such as paints, molding compositions, coatings, plastic compositions, printing inks, synthetic resins, pesticides, and the like. Solids to be mixed into the liquid medium include, for example, pigments, fillers, and fibers.

Prior patents disclose phosphate dispersants of different structures and the patent found that the use of certain structures as dispersants is limited in a wide range of applications. If a compound and the system are not used completely, inadequate dispersion will occur due to inadequate interaction with the environmental medium, and potential sedimentation and viscosity increase associated with cloudiness, spotting will also occur. Therefore, it is required to develop a dispersant suitable for a wide range of applications and a wide range of uses.

However, the existing phosphate ester dispersing agent contains phosphorus, has certain toxicity, is easy to cause environmental pollution, and destroys ecological stability. Still others such as lignosulfonates, naphthalene sulfonate formaldehyde condensate sodium salt dispersants, and the like, are prone to settling and flocculation.

Disclosure of Invention

The invention aims to solve the technical problems that the dispersing agent in the prior art is easy to settle and flocculate and has high toxicity, and provides the dispersing agent for the pesticide, which has low toxicity and is difficult to settle and flocculate.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a dispersant for pesticides comprises the following components in percentage by weight: 10-35% of polycarboxylic acid dispersant, 4-8% of polyether modified polysiloxane, 20-30% of ethyl acetate, 10-20% of benzenesulfonic acid, 6-10% of CMC, and the balance of water.

Further, the polycarboxylic acid dispersant is acrylic acid- (methyl) acrylic acid copolyester.

Furthermore, the polycarboxylic acid dispersant is formed by grafting copolymerization of different unsaturated monomers.

Further, the molecular weight distribution range of the polycarboxylic acid dispersant is 10000-100000.

Further, the polycarboxylic acid dispersant comprises a hydrophobic group and a hydrophilic group, wherein the molecular weight of the hydrophobic group is 7000-.

Furthermore, the proportion of the hydrophilic part in the chain segment of the polycarboxylic acid dispersant is 20-40%.

Further, the dispersant for the pesticide consists of the following components in percentage by weight: 25% of polycarboxylic acid dispersant, 6% of polyether modified polysiloxane, 25% of ethyl acetate, 15% of benzenesulfonic acid, 5% of CMC and the balance of water.

The purpose of the invention adopting the polycarboxylic acid dispersant is as follows: the polycarboxylic acid dispersant has small sensitivity to ions, pH value, temperature and the like in a suspension system, high dispersion stability and difficult sedimentation and flocculation; the polycarboxylic acid dispersant improves the content of solid particles, remarkably reduces the viscosity of a dispersion system, has better fluidity at high solid content, reduces the cost of raw materials and reduces the abrasion of equipment; the raw material selection range is wide, different types of comonomers can be selected, and the designability of the molecular structure and the performance is strong.

The beneficial effects of the invention are as follows: the dispersant for the pesticide is non-toxic and harmless, has small sensitivity degree on pH value, temperature and the like, has high dispersion stability, and is not easy to settle and flocculate; the polycarboxylic acid dispersant improves the content of solid particles, obviously reduces the viscosity of a dispersion system, has better fluidity at high solid content, reduces the cost of raw materials and reduces the abrasion of equipment.

Detailed Description

The invention is further described with reference to specific embodiments, which are not intended to limit the scope of the claims.