阅读说明：本技术 一种聚酰胺型增塑剂的制备方法 (Preparation method of polyamide plasticizer ) 是由 刘若望 樊宏斌 张伟禄 于 2020-06-04 设计创作，主要内容包括：本发明公开了一种聚酰胺型增塑剂的制备方法,由端基为羧基的化合物或酰氯和端基为氨基的化合物反应而成。本发明增塑剂具有与聚氨酯相容性好的特点以及与聚酰胺本体之间有氢键作用,对力学性能影响小的特点。(The invention discloses a preparation method of a polyamide plasticizer, which is prepared by reacting a compound with a carboxyl end group or acyl chloride with a compound with an amino end group. The plasticizer has the characteristics of good compatibility with polyurethane and small influence on mechanical properties due to the hydrogen bond effect between the plasticizer and a polyamide body.)

1. A method for preparing a polyamide type plasticizer is characterized in that:

by

Compounds with terminal carboxyl groups or acid chlorides

And

compounds with amino end groups

And (3) reacting.

2. The method for preparing a polyamide type plasticizer according to claim 1, wherein:

the compound with the terminal group of carboxyl is phthalic acid.

3. The method for preparing a polyamide type plasticizer according to claim 1, wherein:

the acyl chloride is monoacyl chloride or diacid chloride.

4. The method for preparing a polyamide type plasticizer according to claim 1, wherein:

the acid anhydride is phthalic anhydride.

5. The method for preparing a polyamide type plasticizer according to claim 1, wherein:

and the end group of the compound is amino, namely monoamine or diamine.

6. The method for preparing a polyamide type plasticizer according to claim 5, wherein:

the monoamine is hexylamine.

7. A polyamide-type plasticizer according to claim 6, wherein:

the diamine is o-phenylenediamine, cyclohexanediamine or hexamethylene diamine.

8. The method for preparing a polyamide type plasticizer according to claim 7, wherein:

the method comprises the following steps: weighing a compound with a hydroxyl end group or acyl chloride and a compound with an amino end group;

step two: adding a compound with a terminal group of hydroxyl or acyl chloride and a compound with a terminal group of amino into an organic solvent, adding a catalyst, and heating to react to obtain the plasticizer.

9. The method for preparing a polyamide type plasticizer according to claim 1, wherein:

the organic solvent is DMF, and the catalyst is 4-N, N-dimethylpyridine.

Background

Because the compatibility of the traditional plasticizer, such as dioctyl phthalate (DOP), in a polyurethane material is poor, the plasticizer-containing polyamide (and strong polar materials such as polyurethane) has low plasticizing efficiency in the using process; (2) plasticizer migration occurs, causing the polyamide material to become rigid (embrittlement occurs in severe cases); (3) such as phosphate plasticizers, can also cause degradation of the polyurethane material, which can reduce the aging resistance of the article.

Disclosure of Invention

In view of the disadvantages of the prior art, the present invention aims to provide a method for preparing a polyamide plasticizer which can be used in polyurethane materials.

In order to achieve the purpose, the invention provides the following technical scheme:

a process for preparing polyamide-type plasticizer features that the compound whose end group is carboxy or acyl chloride is reacted with the compound whose end group is amino.

As a further improvement of the present invention,

the compound with the terminal group of carboxyl is phthalic acid.

As a further improvement of the present invention,

the acyl chloride is monoacyl chloride or diacid chloride.

As a further improvement of the present invention,

the acid anhydride is phthalic anhydride.

As a further improvement of the present invention,

and the end group of the compound is amino, namely monoamine or diamine.

As a further improvement of the present invention,

the monoamine is hexylamine.

As a further improvement of the present invention,

the diamine is o-phenylenediamine, cyclohexanediamine or hexamethylene diamine.

As a further improvement of the present invention,

the method comprises the following steps: weighing a compound with a hydroxyl end group or acyl chloride and a compound with an amino end group;

step two: adding a compound with a terminal group of hydroxyl or acyl chloride and a compound with a terminal group of amino into an organic solvent, adding a catalyst, and heating to react to obtain the plasticizer.

As a further improvement of the present invention,

the organic solvent is DMF, and the catalyst is 4-N, N-dimethylpyridine.

The invention has the beneficial effects that the plasticizer has the same structural unit (NHCO) with polyamide, can be mutually dissolved with polyamide materials and is not easy to migrate, thereby overcoming the defects of the traditional plasticizer. The polyamide plasticizer has wide application field, and can be applied to various polyamide materials, polycarbonate, polyurethane and other high polymer materials.

In conclusion, the plasticizer has the characteristics of good compatibility with polyurethane and small influence on mechanical properties due to the fact that the plasticizer has hydrogen bond effect with the polyamide body.

Detailed Description