阅读说明：本技术 一种具有抗翘曲性能的聚烯烃色母粒及其制备方法 (Polyolefin color master batch with anti-warping performance and preparation method thereof ) 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：本发明公开了一种具有抗翘曲性能的聚烯烃色母粒及其制备方法。所述聚烯烃色母粒包括载体树脂、有机颜料、添加剂,还包括颜料衍生物,所述颜料衍生物具有式I所示的分子结构,式I：<Image he="233" wi="700" file="DDA0001750777790000011.GIF" imgContent="drawing" imgFormat="GIF" orientation="portrait" inline="no"></Image>其中,式I中吡咯并吡咯二酮骨架上取代基的位置是对位或间位或邻位,两个取代基的位置和结构都相同；n为1～30之间的整数；C<Sub>n</Sub>H<Sub>2n+1</Sub>基团是直链或带有支链的烷基。本发明有效抑制了塑件加工过程中的翘曲现象,提高了塑件的加工质量,扩大了有机颜料在塑料中的推广应用。(The invention discloses a polyolefin color master batch with anti-warping performance and a preparation method thereof. The polyolefin color master batch comprises a carrier resin, an organic pigment, an additive and a pigment derivative, wherein the pigment derivative has a molecular structure shown in a formula I: wherein, the position of the substituent group on the pyrrolopyrrole-dione skeleton in the formula I is para position, meta position or ortho position, and the positions and the structures of the two substituent groups are the same; n is 1 to 30An integer of (d); c n H 2n+1 The radicals are linear or branched alkyl radicals. The invention effectively inhibits the warping phenomenon in the plastic part processing process, improves the processing quality of the plastic part, and expands the popularization and application of the organic pigment in plastics.)

1. A polyolefin color master batch with anti-warping performance comprises a carrier resin, an organic pigment and an additive, and is characterized by further comprising a pigment derivative, wherein the pigment derivative has a molecular structure shown in a formula I,

formula I:

wherein, the position of the substituent group on the pyrrolopyrrole-dione skeleton in the formula I is para position, meta position or ortho position, and the positions and the structures of the two substituent groups are the same; n is an integer of 1-30; c_nH_2n+1The radicals being straight-chain or branched alkyl radicals。

2. The polyolefin color masterbatch with warp resistance of claim 1, wherein the carrier resin, the organic pigment, the additive and the pigment derivative are, in weight percentage, respectively: 50-75% of carrier resin, 20-40% of organic pigment, 0.1-5% of pigment derivative and 0-5% of additive.

3. The polyolefin color masterbatch with warp resistance of claim 2, wherein the molecular structure of the pigment derivative is one of the molecular structures shown in formula II, formula III, formula IV and formula V,

formula II:

formula III:

formula IV:

formula V:

4. the polyolefin color masterbatch with warp resistance of claim 2, wherein the carrier resin is one or more of low density polyethylene, high density polyethylene, linear low density polyethylene, homo polypropylene and co-polypropylene.

5. Polyolefin color masterbatch with warp resistance according to claim 2, characterized in that the organic pigment is a pyrrolopyrrole dione type pigment.

6. The polyolefin color masterbatch with anti-warping property according to claim 2, wherein the additive is one or more of polyethylene wax, polypropylene wax, white mineral oil, oxidized polyethylene wax, EVA wax, stearic acid, stearate, phthalate.

7. The polyolefin color masterbatch with warp resistance of claim 5, wherein the 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.

8. A process for preparing a polyolefin masterbatch with warp resistance according to any one of claims 1 to 7, comprising the steps of:

the method comprises the following steps: premixing, wherein the carrier resin, the organic pigment, the additive and the pigment derivative are premixed for 10 minutes;

step two: mixing, namely extruding the mixture obtained in the step one in a single-screw extruder at 200 ℃;

step three: cooling, namely cooling the mixture obtained in the step two by cold water;

step four: drying, namely drying the mixture obtained in the step three;

step five: and C, cutting the pellets, and cutting the mixture dried in the fourth step into pellets to obtain the color master batch.

Technical Field

The invention relates to the technical field of fine chemical engineering, in particular to a polyolefin color master batch with anti-warping performance and a preparation method thereof.

Background

Polyolefins, mainly Polyethylene (PE) and polypropylene (PP), are one of the most important plastic varieties with high cost performance, excellent mechanical properties, thermal properties, processability, etc. Low Density Polyethylene (LDPE) and Linear Low Density Polyethylene (LLDPE) are mostly used for producing films and plates, High Density Polyethylene (HDPE) has higher rigidity and toughness and is mainly used for producing films, blow molding, pipes and the like, and some mechanical properties of polypropylene can be comparable to engineering plastics and are one of the thermoplastic plastics with the most development prospect at present. The plastic coloring is an indispensable ring in the plastic production, not only adds color to the plastic product, but also can endow the plastic with various functions and improve certain application properties of the plastic. The traditional coloring method has the defects of large dust pollution, inaccurate metering, poor dispersibility and the like. Color concentrates have now become the primary means of obtaining high quality plastic colored articles. The color masterbatch is an aggregate prepared by uniformly loading an excessive amount of pigment in a resin, and generally consists of three basic elements of the pigment, a carrier resin and an additive. The carrier resin of the polyolefin masterbatch is generally selected from the same type of polymer as the resin to be colored.

In the prior art, polyethylene and polypropylene plastics belong to partially crystalline plastics, and have large shrinkage in a cooling step in the injection molding process, so that a plastic part cannot be formed according to a designed shape, and the warping phenomenon occurs. Especially, after the organic pigment is added, the organic pigment becomes a nucleating agent of partially crystallized plastics, the warping phenomenon is aggravated, and the application of the organic pigment in the plastics is limited.

Therefore, the method inhibits the warping phenomenon during the coloring and processing of the polyolefin plastic, expands the application and popularization of the organic pigment in the plastic, and is a technical problem which is urgently needed to be solved in the technical field of the existing fine chemical engineering.

Disclosure of Invention

The object of the present invention is to suppress the warpage phenomenon in coloring processing of polyolefin plastics. In order to achieve the purpose of the invention, the invention provides a polyolefin color master batch with anti-warping performance.

In the technical scheme disclosed by the invention, the polyolefin color master batch comprises a carrier resin, an organic pigment, an additive and a pigment derivative, wherein the pigment derivative has a molecular structure shown in a formula I,

formula I:

wherein, the position of the substituent group on the pyrrolopyrrole-dione skeleton in the formula I is para position, meta position or ortho position, and the positions and the structures of the two substituent groups are the same; n is an integer of 1-30; c_nH_2n+1The radicals are linear or branched alkyl radicals.

Further, in the technical scheme disclosed by the invention, the carrier resin, the organic pigment, the additive and the pigment derivative comprise the following components in percentage by weight: 50-75%, 20-40% of organic pigment, 0.1-5% of pigment derivative and 0-5% of additive.

Further, in the technical scheme disclosed by the invention, the carrier resin is one or more of low-density polyethylene, high-density polyethylene, linear low-density polyethylene, homo-polypropylene and co-polypropylene.

Further, in the technical scheme disclosed by the invention, the organic pigment is a pyrrolopyrrole diketone pigment.

Further, in the technical scheme disclosed by the invention, the additive is one or more of polyethylene wax, polypropylene wax, white mineral oil, oxidized polyethylene wax, EVA wax, stearic acid, stearate and phthalate.

Preferably, in the technical scheme disclosed by the invention, the 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.

In order to achieve the object of the present invention, the present invention also provides a preparation method of a polyolefin color masterbatch with anti-warpage property, comprising the steps of:

the method comprises the following steps: premixing, wherein the carrier resin, the organic pigment, the additive and the pigment derivative are premixed for 10 minutes;

step two: mixing, namely extruding the mixture obtained in the step one in a single-screw extruder at 200 ℃;

step three: cooling, namely cooling the mixture obtained in the step two by cold water;

step four: drying, namely drying the mixture obtained in the step three;

step five: and C, cutting the pellets, and cutting the mixture dried in the fourth step into pellets to obtain the color master batch.

Compared with the prior art, the technical scheme of the polyolefin color master batch disclosed by the invention is provided with the pigment derivative, the molecular structure of the pigment derivative is disclosed, and the polyolefin color master batch is prepared according to a certain component, so that the warping phenomenon in the plastic part processing process is effectively inhibited, the processing quality of the plastic part is improved, and the popularization and application of the organic pigment in plastics are expanded.

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

Is free of

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, polyolefin plastic belongs to partially crystalline plastic, and has large shrinkage in a cooling step in an injection molding process, so that a plastic part cannot be formed according to a designed shape, and the warping phenomenon is caused. Especially, after the organic pigment is added, the organic pigment becomes a nucleating agent of partially crystallized plastics, further aggravates the warping phenomenon, and limits the application of the organic pigment in the plastics.

In order to solve the problems in the prior art, the embodiment of the invention discloses a polyolefin color master batch with anti-warping performance. In the technical scheme, the polyolefin color master batch comprises a carrier resin, an organic pigment, an additive and a pigment derivative, wherein the pigment derivative has a molecular structure shown in a formula I,

formula I:

wherein, the position of the substituent group on the pyrrolopyrrole-dione skeleton in the formula I is para position, meta position or ortho position, and the positions and the structures of the two substituent groups are the same; n is an integer of 1-30; c_nH_2n+1The radicals are linear or branched alkyl radicals. The addition of the pigment derivative with the molecular structure shown in the formula I effectively inhibits the warping phenomenon in the plastic part processing process and improves the processing quality of the plastic part.

In the technical scheme disclosed by the embodiment of the invention, the carrier resin, the organic pigment, the additive and the pigment derivative comprise the following components in percentage by weight: 50-75% of carrier resin, 20-40% of organic pigment, 0.1-5% of pigment derivative and 0-5% of additive.

Further, in the technical solution disclosed in the embodiment of the present invention, the carrier resin is one or more of low density polyethylene, high density polyethylene, linear low density polyethylene, homo-polypropylene, and co-polypropylene.

Further, in the technical scheme disclosed by the embodiment of the invention, the organic pigment is a pyrrolopyrrole diketone pigment. Preferably, the 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.

Further, in the technical scheme disclosed in the embodiment of the present invention, the additive is one or more of polyethylene wax, polypropylene wax, white mineral oil, oxidized polyethylene wax, EVA wax, stearic acid, stearate, and phthalate.

Of course, the above choices of the carrier resin, the organic pigment, and the additive are not limited thereto, and only one preferred embodiment is given here.

In order to achieve the object of the present invention, the embodiment of the present invention further provides a preparation method of a polyolefin color masterbatch with anti-warpage performance, the method includes the following steps:

the method comprises the following steps: premixing, namely premixing the carrier resin, the organic pigment, the additive and the pigment derivative for 10 minutes, wherein the device for premixing is an oscillator;

step two: mixing, namely extruding the mixture obtained in the step one in a single-screw extruder at 200 ℃;

step three: cooling, namely cooling the mixture obtained in the step two by cold water;

step four: drying, namely drying the mixture obtained in the step three;

step five: and C, cutting the pellets, and cutting the mixture dried in the fourth step into pellets to obtain the color master batch.

In the following examples of the present invention, the parts are all parts by weight.