Cast nylon active heat resisting flexibilizer and preparation thereof

Abstract

The invention discloses an active heat-resisting toughening agent for monomer cast nylon and a preparation method thereof, and relates to a modifier for the monomer cast nylon and a preparation method thereof. The invention solves the problem of poor thermal stability of the monomer cast nylon because the prior monomer cast nylon has ether bonds or ester bonds. The active heat-resisting toughening agent for the monomer cast nylon is prepared by performing diamine chain extension, dibenzyl hydroxyl phthalic acylation, ammonia esterification and acyl amidation reaction on Bimaleimide, diamine, furfuryl alcohol, isocyanate and lactam. The product is brownish red or brown solid, has a melting point of between 95 and 115 DEG C, and is easy to be dissolved in a polar solvent such as thermal toluene and cresol. The product improves the water absorbability and the thermal stability of the copolymerized monomer cast nylon, and the martin temperature reaches more than 98 DEG C. The active heat-resisting toughening agent has rich resources of raw materials, simple technique, low manufacturing cost, stable product properties and no pollutant exhausted, and is convenient to popularize and apply.

Description

technical field [0001] The invention relates to a modifier for cast nylon and a preparation method thereof. Background technique [0002] Cast nylon is widely used due to its excellent performance, simple preparation process, energy saving and other advantages. However, ordinary cast nylon has the disadvantages of high brittleness, high water absorption, poor dimensional stability, and poor anti-friction and wear resistance during high-load operation, so it is used in environments requiring high impact resistance or high load. It is often subject to greater restrictions when it is required to operate under conditions, or requires the product to be used in water or a humid environment, or to be used in a special environment such as a wide range of temperature changes. For this reason, a lot of research has been done on the modification of cast nylon at home and abroad to improve its properties such as anti-friction and wear resistance, toughening and strengthening, and antis...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the thermal stability of cast nylon is deteriorated due to the existence of ether bonds or ester bonds in cast nylon; and a kind of active heat-resistant toughening agent for cast nylon and its preparation method are provided

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