Halogen-free flame-retardant ABS resin composition containing nano-scale flame retardant and preparation method thereof

文档序号：711897 发布日期：2021-04-16 浏览：25次中文

阅读说明：本技术 一种含纳米级阻燃剂的无卤阻燃abs树脂组合物及其制备方法 (Halogen-free flame-retardant ABS resin composition containing nano-scale flame retardant and preparation method thereof ) 是由董雨生丁旭梁亚男鲁文芳刘嘉任尹秀萍诸金纪效均蔡青周文于 2020-12-09 设计创作，主要内容包括：本发明公开了本发明涉及一种含纳米级阻燃剂改性的无卤阻燃ABS树脂及其制备方法,由以下重量份的原料制备而成：ABS树脂45～85％；复合阻燃剂10～50％；润滑剂1～3％；分散剂0.01～2％；抗氧剂0.01～0.5％；所述的复合阻燃剂为SAN接枝PBL乳胶微球包裹的纳米级阻燃剂复配物。主要解决了无卤阻燃剂和ABS相容性较差,大剂量添加时导致产品性能降低的问题。其特征在于：使用SAN接枝PBL乳胶微球包裹的纳米级阻燃剂复配物作为复合阻燃剂,极大地促进了无卤阻燃剂在ABS树脂中较好地分散,且具有增韧作用。结果显示,阻燃剂复配物的有效添加量低至5％时仍使阻燃ABS达到UL 94 V-0级,且缺口冲击强度＞13KJ/m～2。(The invention discloses a modified halogen-free flame-retardant ABS resin containing a nanoscale flame retardant and a preparation method thereof, wherein the modified halogen-free flame-retardant ABS resin is prepared from the following raw materials in parts by weight: 45-85% of ABS resin; 10-50% of a composite flame retardant; 1-3% of a lubricant; 0.01-2% of a dispersant; 0.01-0.5% of antioxidant; the composite flame retardant is a nano-scale flame retardant compound wrapped by SAN grafted PBL latex microspheres. Mainly solves the problems that the compatibility of the halogen-free flame retardant and ABS is poor and the product performance is reduced when a large amount of the halogen-free flame retardant and ABS are added. The method is characterized in that: wrapping with SAN grafted PBL latex microspheresThe nano-scale flame retardant compound is used as a composite flame retardant, greatly promotes the halogen-free flame retardant to be well dispersed in ABS resin, and has a toughening effect. The result shows that when the effective addition amount of the flame retardant compound is as low as 5 percent, the flame retardant ABS still reaches UL 94V-0 grade, and the notch impact strength is more than 13KJ/m 2 。)

1. A halogen-free flame-retardant ABS resin containing a nanoscale flame retardant is characterized in that: the feed is prepared from the following raw materials in parts by weight:

the composite flame retardant is a nano-scale flame retardant compound wrapped by SAN grafted PBL latex microspheres.

2. The halogen-free flame retardant ABS resin containing nano-scale flame retardant as claimed in claim 1, wherein: the ABS resin is ABS granules or a compound of ABS powder and SAN.

3. The halogen-free flame retardant ABS resin containing nano-scale flame retardant as claimed in claim 1, wherein: the grafting efficiency of the SAN grafted PBL latex microspheres is controlled to be 45-75%.

4. The halogen-free flame retardant ABS resin containing nano-scale flame retardant as claimed in claim 3, wherein: the grafting efficiency of the SAN grafted PBL latex microspheres is controlled to be 50-65%.

5. The halogen-free flame retardant ABS resin containing nano-scale flame retardant as claimed in claim 1, wherein: the effective content of the nanoscale flame retardant compound in the flame-retardant ABS is controlled to be 3-20%.

6. The halogen-free flame retardant ABS resin containing nano-scale flame retardant as claimed in claim 5, wherein: the effective content of the nanoscale flame retardant compound in the flame-retardant ABS is controlled to be 8-15%.

7. The halogen-free flame retardant ABS resin containing nano-scale flame retardant as claimed in claim 1, wherein: the nanoscale flame retardant compound comprises a main flame retardant and an auxiliary flame retardant; the main flame retardant is one or two compounds of magnesium hydroxide and aluminum hydroxide with nano-scale particle size, the auxiliary flame retardant is one or two compounds of red phosphorus and PVC, and the proportion of the two is that of the main flame retardant: 10-25% of auxiliary flame retardant: 5 to 15 percent.

8. The halogen-free flame retardant ABS resin containing nano-scale flame retardant as claimed in claim 7, wherein: the red phosphorus is nano-scale microencapsulated red phosphorus, and the PVC is 5-type PVC resin powder.

9. The halogen-free flame retardant ABS resin containing nano-scale flame retardant as claimed in claim 1, wherein: the dispersing agent is selected from hexane, n-hexane or absolute ethyl alcohol;

the lubricant is one or more of stearic acid, zinc stearate or calcium stearate; the dispersing agent is hexane, n-hexane or absolute ethyl alcohol; the antioxidant is one or more of 1010, 1076, DLTP, DSTP and DSTDP.

10. The method for preparing the halogen-free flame retardant ABS resin composition containing nano-scale flame retardant according to any of claims 1-9, characterized in that: the method comprises the following steps:

adding the ABS raw material, the composite flame retardant, the lubricant, the dispersant and the antioxidant into a high-speed mixer together according to a proportion, and fully mixing for 1-10 minutes; feeding the materials into a double-screw extruder with the length-diameter ratio of more than or equal to 20, and extruding and granulating at the temperature of 150-250 ℃ to obtain the halogen-free flame-retardant ABS resin containing the nanoscale flame retardant.

Technical Field

The invention relates to the technical field of high polymer material processing, in particular to a halogen-free flame retardant ABS resin composition containing a nano-scale flame retardant and a preparation method thereof.

Background

The ABS material has the characteristics of high strength, good toughness, easy processing, good gloss and the like, and is widely applied to the fields of household appliances, children toys, mechanical accessories, automobile interior and exterior decorations and the like. However, ABS is extremely easy to burn, the horizontal burning speed of ABS is about 2.5-5.1 cm/min, and a large amount of black smoke and toxic gas are generated during burning, so that great potential safety hazards are extremely easy to generate. The traditional flame retardant method is to add halogen flame retardant, and the obtained product has good flame retardant effect, but generates toxic and corrosive gas during combustion, and has great side effect on human and environment. In recent years, with the general improvement of environmental awareness of people, for example, the european union countries have issued a command on scrapped electronic and electrical equipment (WEEE) and a command on prohibition of use of certain harmful substances in electronic and electrical equipment (RoHS) in 2003 2 months, and according to the RoHS command requirements, electric and electronic products released to the european union market after 7 months and 1 days 2006 must not contain 6 kinds of harmful substances such as polybrominated biphenyls and polybrominated diphenyl ethers. Therefore, the application of halogen-containing flame retardant in ABS materials is increasingly limited, non-halogenation becomes the main trend of flame retardant development and application, and the development of environment-friendly halogen-free flame retardant ABS materials is imperative. The halogen-free flame retardant in the current market mainly comprises metal oxide, phosphorus flame retardant and the like, has poor compatibility with ABS materials, is difficult to disperse, and can cause the performance indexes such as toughness and the like to be reduced by directly adding the halogen-free flame retardant into the ABS main material.

Disclosure of Invention

Aiming at the defects in the prior art, the halogen-free flame retardant ABS resin composition containing the nano-scale flame retardant and the preparation method thereof are provided, so that the problems of poor compatibility, difficult dispersion and difficult balanced maintenance of ABS performance of the existing flame retardant are solved.

The purpose of the invention is realized by the following technical scheme.

A halogen-free flame retardant ABS resin containing a nanoscale flame retardant is prepared from the following raw materials in parts by weight:

the composite flame retardant is a nano-scale flame retardant compound wrapped by SAN grafted PBL latex microspheres.

Wherein the content of the first and second substances,

the ABS resin is ABS granules or a compound of ABS powder and SAN.

In order to ensure the compatibility of the composite flame retardant and the ABS resin, the grafting efficiency of the SAN grafted PBL latex microspheres is controlled to be 45-75%, and preferably 50-65%.

The effective content of the nano-scale flame retardant compound in the flame-retardant ABS is controlled to be 3-20%, and the preferable content is 8-15%.

The nanoscale flame retardant compound comprises a main flame retardant and an auxiliary flame retardant. The main flame retardant is one or two compounds of magnesium hydroxide and aluminum hydroxide with nano-scale particle size, the auxiliary flame retardant is one or two compounds of red phosphorus and PVC, and the proportion of the two is that of the main flame retardant: 10-25% of auxiliary flame retardant: 5 to 15 percent.

Furthermore, the red phosphorus is nano-scale microencapsulated red phosphorus, and the PVC is 5 type PVC resin powder.

The dispersing agent is selected from hexane, n-hexane or absolute ethyl alcohol.

The lubricant is one or more of stearic acid, zinc stearate or calcium stearate; the dispersing agent is hexane, n-hexane or absolute ethyl alcohol; the antioxidant is one or more of 1010, 1076, DLTP, DSTP and DSTDP.

The invention also provides a preparation method of the halogen-free flame-retardant ABS resin composition containing the nano-scale flame retardant, which comprises the following steps:

Compared with the prior art, the invention has the following advantages:

according to the invention, a certain content of nano-scale composite flame retardant coated by SAN grafted PBL latex microspheres is added, and the nano-scale composite flame retardant coated by the SAN grafted PBL latex microspheres not only ensures better compatibility and dispersion of the flame retardant and ABS material, but also enables the flame retardant to better exert flame retardant efficiency, and simultaneously the obtained flame retardant ABS has better comprehensive performance. The preparation method and the technical process of the invention are simple, the cost is low, the processing process is stable, and the preparation method is very suitable for industrial production.

Detailed Description

The following examples and comparative examples use raw material information:

ABS is purchased from Qimei, the SAN grafted PBL latex microsphere wrapped nano-scale composite flame retardant is self-made, the lubricant is stearic acid, and the dispersant is absolute ethyl alcohol; the antioxidant is 1010, 1076.

The conventional mechanical property and combustion property test of the flame-retardant ABS resin composition are carried out according to the following standards, and the results are shown in Table 1.

Charpy notched impact strength: according to ISO 179-1: 2010(E) standard test, impact energy 4J;

bending strength: testing according to ISO 178:2010(E) standard, wherein the testing speed is 2 mm/min;

flexural modulus: testing according to ISO 178:2010(E) standard, wherein the testing speed is 2 mm/min;

combustion performance: testing according to UL 94 standard;

the invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.

Example 1