Method for producing polyurethane toughness-reinforcing cast form nylon composite material

A technology for casting nylon and composite materials, which is applied in the field of preparation of polyurethane toughened casting nylon composite materials, can solve problems such as application field limitation, easy brittle cracking, large brittleness, etc., and achieves improved tribological properties and antistatic properties, High mechanical strength, the effect of improving mechanical strength

Inactive Publication Date: 2008-06-11
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
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Problems solved by technology

However, its high crystallinity makes the material more brittle, especially under low temperature conditions, which limits its application field to a certain extent.

Method used

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  • Method for producing polyurethane toughness-reinforcing cast form nylon composite material

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Embodiment 1

[0016] (1) Preparation of isocyanate-terminated polyurethane prepolymer:

[0017] A) Weigh 100 parts of polytetrahydrofuran ether (PTMG for short) in parts by mass (the following are all in parts by mass), and dehydrate for 30 to 60 min at 100°C to 150°C and a pressure of 0.01 to 0.1 Pa. The treated polyether is obtained, for use;

[0018] B) 16 parts of toluene diisocyanate (TDI for short) are weighed for subsequent use;

[0019] C) The treated PTMG is heated to 70° C., and a metered amount of TDI is added to carry out a polymerization reaction, and the reaction is carried out for 120-240 min to obtain an isocyanate-terminated polyurethane prepolymer with a free isocyanate content of 3%. spare;

[0020] (2) Weigh 200 parts of caprolactam monomer, divide one-half of it and put it into a container and heat it to about 120°C to melt the material, vacuumize and dehydrate until no water flows out, and the vacuum degree is 10 -1 ~10 -3 Pa. spare;

[0021] (3) Mix 100 parts of...

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Abstract

The invention relates to a preparation method of polyurethane plasticizing monomer casting nylon compound material. The material is made through pouring the raw material of polyurethane prepolymer, and caprolactam, etc. The main performance of the material is characterized in that the mechanical strength is improved, the tensile fracture elongation rate is increased along with increasing of the use amount of the polyurethane prepolymer, the impact strength is enhanced along with the increasing of the use amount of the polyurethane prepolymer, and the tribology performance and the antistatic performance are improved remarkably.

Description

technical field [0001] The invention relates to a preparation method of a polyurethane toughened cast nylon composite material. Background technique [0002] Cast nylon (ie MC nylon) is made by using the molten raw caprolactam monomer as a catalyst under normal pressure, together with activators and other additives, and directly injecting it into a mold that is preheated to a certain temperature. The polymerization reaction in the mold is carried out very quickly, and it condenses into a tough solid piece. Cast nylon has a high degree of polymerization, high molecular weight and crystallinity, and has better properties than other engineering plastics. It is widely used to manufacture wear-resistant and anti-friction parts, especially for the manufacture of large-scale products that cannot be solved by injection molding and compression molding. It is gradually replacing copper, aluminum, steel and other metal materials in many fields. However, its high crystallinity makes t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08L75/04C08G18/10C08G69/16
Inventor 简令奇潘炳力王宏刚杨生荣
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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