CN1062356A

CN1062356A - A kind of processing method of heterogeneous modification of nylon

Info

Publication number: CN1062356A
Application number: CN 91107985
Authority: CN
Inventors: 杨思会; 葛国际
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-12-12
Filing date: 1991-12-12
Publication date: 1992-07-01

Abstract

The present invention relates to the method for modifying of a kind of method of modifying of polymkeric substance, particularly monomer moulding casting nylon.Graphite, molybdenumdisulphide, tetrafluoroethylene, carbon fiber etc. are anisotropically added in the polymkeric substance, form the compound concentration gradient, make goods have wear-resisting, the thermotolerance higher, have the good toughness of pure nylon simultaneously again than pure nylon.

Description

A kind of processing method of heterogeneous modification of nylon

The present invention relates to the non-homogeneous modified method of a kind of method of modifying of solid macromolecule material, particularly a kind of monomer moulding casting nylon.

Monomer moulding casting nylon claims MC nylon again, be the highest a kind of of physical strength in the engineering plastics at present commonly used, because its high-performance, make it at a lot of industrial circles, used widely, but MC nylon is not perfect in every way, perfect, also there are some shortcomings that are difficult to overcome in it, as wear resistance, thermotolerance, aging etc., compare with some non-ferrous metal and to also have certain gap, therefore also be difficult to be competent at some important industrial circles.

When polymerization, add certain compound and carry out the method that modification is industrial frequent employing at present, it can improve some performance of nylon, as add graphite, molybdenumdisulphide etc., can improve the performance such as wear-resisting, heat-resisting, uvioresistant of nylon, but along with the adding of compound, the shock resistance of nylon descends, therefore both require wear-resisting, heat-resisting, require under the shock proof condition this material modified ideal effect that just do not reach again.

The object of the present invention is to provide a kind of new method of modifying, make a kind of heterogeneous modification of nylon material with this method, it has high abrasion, the thermotolerance that nylon had after the compound modification, and has the good shock resistance of common nylon.The interior lining panel of the most suitable manufacturing metallurgical equipment replaces existing metal backing.

This technology is a kind of heterogeneous modification of nylon processing method that realizes like this, it is to be raw material according to a conventional method with the hexanolactam, sodium hydroxide is catalyzer, carbimide is a promotor, in die for molding, it is characterized in that: add compound graphite, molybdenumdisulphide, tetrafluoroethylene, carbon cellulose etc. when molten material, adding total amount is 1～15%; Add viscosity modifier nylon 6, add-on is 1～5%.Dehydration is poured in the mould after the reaction according to a conventional method.After the material that contains compound enters mould, because the proportion of compound is greater than material proportion, therefore to the bottom sedimentation, regulate viscosity with nylon 6 content, the control settling velocity makes compound form certain concentration gradient, be dispersed in the polymkeric substance heterogeneously, the concentration of bottom is bigger, and is therefore wear-resisting, resistance toheat improves, and the concentration on top is very little, contain 6 toughening effects of certain nylon again, therefore have good toughness, middle portion concentration gradually changes, no sharp interface, intensity is even, the recessed heart occurs for avoiding shrinking when moulding, need strict control mold temperature, the casting material temperature is at 140～150 ℃, keeping temperature should be best in the time of 145～155 ℃, use the ordinary method demoulding, the finishing upper face can obtain ideal heterogeneous modification of nylon goods.

The heterogeneous modification of nylon material that obtains with processing method of the present invention, the advantage of nylon after the existing modification, the preceding advantage of modification is arranged again, prolonged the work-ing life of nylon material under long-term friction condition, avoided the adding of compound again, shock resistance is descended, fracture takes place in the use and scraps, be common nylon and general method modification of nylon incomparable type material.

Claims

1, a kind of non-homogeneous modified method of monomer moulding casting nylon is used for improving wear-resisting, the thermotolerance of nylon, has avoided again because the adding of compound, influences the toughness of nylon.

2, by the non-homogeneous modified method of the described a kind of monomer moulding casting nylon of claim 1, it is characterized in that: make compound with graphite, molybdenumdisulphide, poly-tetrafluoro hexene, carbon fiber, adding total amount is 1～15%.

3, by the non-homogeneous modified method of the described a kind of monomer moulding casting nylon of claim 1, it is characterized in that: the casting material temperature is at 140～150 ℃.

4, by the non-homogeneous modified method of the described a kind of monomer moulding casting nylon of claim 1, it is characterized in that: moulding maintains the temperature at 145～155 ℃.

5, by the non-homogeneous modified method of the described a kind of monomer moulding casting nylon of claim 1, it is characterized in that: the nylon 6 of adding 1～5% is as viscosity modifier and toughner during polymerization.