阅读说明：本技术 吡咯并吡咯二酮类颜料衍生物合成方法及其制成产品用途 (Synthesis method of pyrrolopyrrole diketone pigment derivative and application of pyrrolopyrrole diketone pigment derivative to prepared product ) 是由 陈晓阳 陈发生 赵汉彬 于 2018-08-01 设计创作，主要内容包括：本发明公开了吡咯并吡咯二酮类颜料衍生物合成方法及其制成产品用途。所述合成方法按照反应方程式I：<Image he="137" wi="700" file="DDA0001751224140000011.GIF" imgContent="drawing" imgFormat="GIF" orientation="portrait" inline="no"></Image>将醛基取代的吡咯并吡咯二酮类颜料衍生物与脂肪胺进行缩合反应,即：在氮气保护下将醛基取代的吡咯并吡咯二酮类颜料衍生物、脂肪胺与催化剂分散在有机溶剂中,回流反应,边回流边分水,直到水量不再增加,冷却至室温,过滤,乙醇洗至滤液无色,烘干。所述衍生物添加在有机颜料中,对部分结晶塑料着色时具有抗翘曲性能。本发明与现有长链取代吡咯并吡咯二酮衍生物的合成方法相比,提高了整体产率,拓宽了吡咯并吡咯二酮类颜料衍生物的应用范围,并具有操作简单的优点。(The invention discloses a synthesis method of a pyrrolopyrrole diketone pigment derivative and application of the pyrrolopyrrole diketone pigment derivative in preparing a product. The synthesis method follows reaction equation I: carrying out condensation reaction on the aldehyde group substituted pyrrolopyrrole diketone pigment derivative and fatty amine, namely: dispersing aldehyde group substituted pyrrolopyrrole diketone pigment derivatives, aliphatic amine and a catalyst in an organic solvent under the protection of nitrogen, carrying out reflux reaction while distributing water until the water amount is not increased any more, cooling to room temperature, filtering, washing with ethanol until the filtrate is colorless, and drying. The derivative is added into an organic pigment, and has anti-warping performance when being used for coloring part of crystalline plastics. The present invention relates to the prior artCompared with the synthesis method of the long-chain substituted pyrrolopyrroledione derivative, the synthesis method improves the overall yield, widens the application range of the pyrrolopyrroledione pigment derivative, and has the advantage of simple operation.)

1. A method for synthesizing pyrrolopyrrole dione pigment derivatives, which is characterized in that according to reaction formula I:

carrying out condensation reaction on the aldehyde group substituted pyrrolopyrrole diketone pigment derivative and fatty amine, namely:

dispersing aldehyde group-substituted pyrrolopyrrole diketone pigment derivatives, aliphatic amine and a catalyst in an organic solvent under the protection of nitrogen, carrying out reflux reaction while distributing water until the water amount is not increased any more, cooling to room temperature, filtering, washing with ethanol until the filtrate is colorless, and drying; wherein the molecular structure of the aldehyde group substituted pyrrolopyrrole diketone pigment derivative is shown as a formula I,

formula I:

wherein, the aldehyde group is respectively and independently positioned at one of ortho-position, meta-position and para-position of the benzene ring.

2. The method for synthesizing the pyrrolopyrrole dione pigment derivative according to claim 1, wherein the molar ratio of the aldehyde group-substituted pyrrolopyrrole dione pigment derivative to the aliphatic amine is 1: 2-4.

3. The method for synthesizing the pyrrolopyrrole dione pigment derivative according to claim 1, wherein the molar ratio of the aldehyde group-substituted pyrrolopyrrole dione pigment derivative to the catalyst is 50-10: 1.

4. The method for synthesizing pyrrolopyrrole dione pigment derivatives according to claim 1, wherein the catalyst is p-toluenesulfonic acid.

5. The method for synthesizing pyrrolopyrrole dione pigment derivatives according to claim 1, wherein the organic solvent is toluene.

6. The use of the pyrrolopyrrole dione pigment derivatives prepared by the method according to any one of claims 1 to 5 for the synthesis of a product, wherein the prepared pyrrolopyrrole dione pigment derivatives are added to pyrrolopyrrole dione organic pigments for the coloration of partially crystalline plastics for injection molding processes, the partially crystalline plastics comprising polypropylene, high density polyethylene or medium density polyethylene or low density polyethylene.

7. The use of the prepared product according to claim 6, wherein the amount of the pyrrolopyrroledione pigment derivative added is 1 to 20% by weight based on the main pigment.

8. Use of the manufactured product according to claim 6, characterized in that the pyrrolopyrrole-dione type organic pigment is one or several of pigment orange 71, pigment orange 73, pigment red 254, pigment red 255, pigment red 264, pigment red 270, pigment red 272.

Technical Field

The invention relates to the technical field of fine chemical engineering, in particular to a synthesis method of a pyrrolopyrrole diketone pigment derivative and application of the pyrrolopyrrole diketone pigment derivative to a prepared product.

Background

Warping (warping) is the distortion of the surface of a plastic part that is not shaped to the designed shape. Although the addition of organic pigments can make the appearance of plastics beautiful, a not negligible problem is that it can also act as a nucleating agent for partially crystalline plastics, thereby exacerbating the warpage phenomenon and limiting the application of organic pigments in plastics.

Pyrrolopyrrole-dione (DPP for short) pigments are high-performance organic pigments developed in 1983 by Ciba (U.S. Pat. No. 4,985,85). The DPP pigment has good symmetry and planarity in molecular structure, amide groups can form intermolecular hydrogen bonds, and the DPP pigment has excellent light resistance, heat resistance and solvent resistance although the molecular weight is low, and is one of the most common organic pigment varieties in plastic products. When the DPP pigment is used for plastic products with high precision, such as threaded bottle caps, the size of all products cannot be ensured to be the same due to the warping phenomenon, and a serious problem is caused.

A plurality of companies at home and abroad hope to find a method for improving or eliminating the warping phenomenon of DPP organic pigments in plastics. For example, CIBA GEIGY (U.S. patent No. US4889562) coats a tough, dense, highly crosslinked ethyl cellulose coating on the surface of an organic pigment, achieving the purpose of improving the warping phenomenon of the organic pigment in plastics; CIBA GEIGY (CN1509319A) discloses a surface-treated organic pigment, which comprises a pigment derivative substituted by an aromatic ring on a pigment skeleton, wherein the aromatic ring can have alkyl, alkyl separated by S or O and other groups; the company CIBA GEIGY (CN1124260A) reported that an organic pigment coated with a zirconium phosphate or titanium complex has anti-warping properties in plastic parts. These attempts have improved the warpage resistance of organic pigments, but have the disadvantage of insignificant improvement or too high cost, and are difficult to apply industrially.

CIBA GEIGY corporation (CN1236784A) developed an alkyl thioether substituted DPP derivative that was added to various classes of organic pigments including DPP to give injection molded plaques that were substantially warp free. The synthesis method of the DPP derivative comprises the steps of condensing p-chlorobenzonitrile and alkyl mercaptan under alkaline conditions to obtain an alkyl thioether substituted benzonitrile derivative, and synthesizing the alkyl thioether substituted DPP derivative by utilizing a sodium alkoxide and tert-amyl alcohol system. On the basis of this, Clariant corporation (CN1675315A) developed a sulfonated DPP-based pigment derivative, which also has anti-warping effect, and synthesized by oxidizing alkyl thioether-substituted DPP derivatives. Similarly, the pioneer nikko company (CN103013173A) discloses a pigment composition with anti-warping property in plastics, which is prepared by adding a derivative of DPP structure in which two meta-positions or two meta-positions and para-positions of benzene ring are substituted by long-chain alkyl thioether.

The compounds developed by the companies have common characteristics in the molecular structure and the synthesis method of the pigment derivative, and the three types of pigment derivatives can improve the anti-warping performance of the DPP pigment, have simple processes and have feasibility of industrial production. However, as can be seen from the analysis of the synthesis method, the reaction of the long-chain alkyl thioether substituted benzonitrile derivative and succinic acid diester in a sodium alkoxide/tert-amyl alcohol system to form the DPP derivative is a key step, and the method has a large steric hindrance, so that the yield of the reaction is low, and the overall yield is affected.

Therefore, how to improve the warpage problem of the partially crystallized plastic by adding the auxiliary agent and improve the overall yield of the synthetic auxiliary agent is a problem which needs to be solved urgently in the technical field of fine chemical engineering.

Disclosure of Invention

The invention aims to provide a method for synthesizing pyrrolopyrrole diketone pigment derivatives, which improves the overall yield of the derivatives and solves the problem of warping in partially crystalline plastics.

In order to achieve the object of the present invention, the present invention also provides a method for synthesizing pyrrolopyrrole dione type pigment derivatives, according to reaction formula I:

carrying out condensation reaction on the aldehyde group substituted pyrrolopyrrole diketone pigment derivative and fatty amine, namely:

dispersing aldehyde group-substituted pyrrolopyrrole diketone pigment derivatives, aliphatic amine and a catalyst in an organic solvent under the protection of nitrogen, carrying out reflux reaction while distributing water until the water amount is not increased any more, cooling to room temperature, filtering, washing with ethanol until the filtrate is colorless, and drying; wherein the molecular structure of the aldehyde group substituted pyrrolopyrrole diketone pigment derivative is shown as a formula I,

wherein, the aldehyde group is respectively and independently positioned at one of ortho-position, meta-position and para-position of the benzene ring.

Further, in the technical scheme disclosed by the invention, the molar ratio of the aldehyde group-substituted pyrrolopyrrole diketone pigment derivative to the fatty amine is 1: 2-4.

Further, in the technical scheme disclosed by the invention, the molar ratio of the aldehyde group-substituted pyrrolopyrrole diketone pigment derivative to the catalyst is 50-10: 1.

Preferably, in the technical scheme disclosed by the invention, the catalyst is p-toluenesulfonic acid.

Preferably, in the technical scheme disclosed by the invention, the organic solvent is toluene.

Furthermore, in order to solve the problem of warping in the partially crystalline plastic, the invention also discloses a product application of the pyrrolopyrrole diketone pigment derivative. The derivative is added into a pyrrolo-pyrrole diketone organic pigment and is used for coloring a partially crystalline plastic for an injection molding process, wherein the partially crystalline plastic comprises polypropylene, high-density polyethylene or medium-density polyethylene or low-density polyethylene.

Further, in the technical scheme of the product application disclosed by the invention, the weight percentage of the addition amount of the pyrrolo-pyrrole-dione pigment derivative to the main pigment is 1-20%.

Further, in the technical scheme of the application of the product disclosed by the invention, the pyrrolopyrrole dione organic pigment is one or more of pigment orange 71, pigment orange 73, pigment red 254, pigment red 255, pigment red 264, pigment red 270 and pigment red 272.

Compared with the prior art, the synthesis method of the pyrrolopyrrole diketone pigment derivative disclosed by the invention solves the warping problem of an organic pigment when part of crystalline plastics is colored, and the synthesis method comprises the steps of firstly combining a DPP skeleton and then connecting a required group, so that the step of generating the DPP derivative by reacting a long-chain alkyl thioether-substituted benzonitrile derivative with succinic acid diester in a sodium alkoxide/tert-amyl alcohol system is avoided, the problem of larger steric hindrance in the existing method is solved, the range of the pyrrolopyrrole diketone pigment derivative is widened, and the method has the advantages of high yield and simplicity in operation.

Additional advantages and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

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Detailed Description

The present invention is further described in detail below with reference to examples so that those skilled in the art can practice the invention with reference to the description.

In the prior art, a long-chain alkyl thioether substituted benzonitrile derivative and succinic acid diester are reacted in a sodium alkoxide/tert-amyl alcohol system to generate a DPP derivative, which is a key step of a synthesis method of a pyrrolopyrrole diketone type pigment derivative.

In order to solve the problems in the prior art, the embodiment of the invention discloses a synthesis method of a pyrrolo-pyrrole diketone pigment derivative, which comprises the following steps:

carrying out condensation reaction on the aldehyde group substituted pyrrolopyrrole diketone pigment derivative and fatty amine, namely:

dispersing aldehyde group-substituted pyrrolopyrrole diketone pigment derivatives, aliphatic amine and a catalyst in an organic solvent under the protection of nitrogen, carrying out reflux reaction while distributing water until the water amount is not increased any more, cooling to room temperature, filtering, washing with ethanol until the filtrate is colorless, and drying; wherein the molecular structure of the aldehyde group substituted pyrrolopyrrole diketone pigment derivative is shown as a formula I,

wherein, the aldehyde group is respectively and independently positioned at one of ortho-position, meta-position and para-position of the benzene ring.

In the technical scheme disclosed in the embodiment of the invention, reference is made to aldehyde group substituted pyrrolopyrrole dione pigment derivatives and a synthesis method thereof (application No. 2018104648990).

Specifically, the synthesis method of the aldehyde group-substituted pyrrolopyrrole diketone pigment derivative can be implemented according to the following steps:

the method comprises the following steps: protection of aldehyde group: under the protection of nitrogen, dissolving aldehyde benzonitrile and ethylene glycol in toluene, adding p-toluenesulfonic acid, carrying out reflux reaction and water separation, cooling to room temperature, adding weak base for liquid separation, washing an obtained organic layer, drying, and removing a solvent to obtain an aldehyde group protected benzonitrile derivative;

step two: condensation reaction: dissolving the benzonitrile derivative and diisopropyl succinate obtained in the step one in tert-amyl alcohol, slowly dropwise adding the obtained mixture into a sodium alkoxide solution, reacting for 3-6 hours, sequentially adding methanol and glacial acetic acid, refluxing and protonating, filtering, washing, drying and crushing to obtain an aldehyde group protected DPP derivative;

step three: deprotection of aldehyde group: dispersing the DPP derivative obtained in the step two in a hydrochloric acid aqueous solution with the mass concentration of 4-15%, stirring and reacting for 2-10 hours, filtering, washing and drying to obtain the aldehyde group substituted pyrrolopyrrole diketone pigment derivative.

Further, in the synthesis method of the pyrrolopyrrole dione pigment derivative disclosed by the embodiment of the invention, the molar ratio of the aldehyde group-substituted pyrrolopyrrole dione pigment derivative to the aliphatic amine is 1: 2-4.

Further, in the synthesis method of the pyrrolopyrrole dione pigment derivative disclosed by the embodiment of the invention, the molar ratio of the aldehyde group-substituted pyrrolopyrrole dione pigment derivative to the catalyst is 50-10: 1.

Further, in the synthesis method of the pyrrolopyrrole dione pigment derivative disclosed in the embodiment of the invention, the catalyst is p-toluenesulfonic acid.

Further, in the synthesis method of the pyrrolopyrrole dione type pigment derivative disclosed in the practice of the invention, the organic solvent is toluene.

In the following examples of the present invention, the parts each represent parts by weight.