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Polyurethane-coated hollow glass micro-bead toughened cast nylon 6 composite material and preparation method thereof

A technology of hollow glass microspheres and cast nylon, which is applied in the field of polyurethane-coated hollow glass microspheres to toughen cast nylon 6 composite materials and its preparation, and can solve problems such as poor compatibility, poor toughening effect, and reduced tensile strength. question

Inactive Publication Date: 2020-02-21
HENAN UNIV OF URBAN CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, the toughening modification of cast nylon is mostly made by adding elastomers, polyolefins, etc. Reduced performance etc.
When using inorganic rigid particles such as calcium carbonate, silicon dioxide, titanium dioxide, silicon carbide and other toughened polyamides, although the modulus, rigidity and hardness of the material can be guaranteed, it is often due to the incompatibility between the inorganic rigid particles and the organic polymer material. Good results in lower tensile strength and poor toughening effect, and the addition of inorganic rigid particles will increase the density of the composite material, which is very unfavorable to the lightweight of the material

Method used

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  • Polyurethane-coated hollow glass micro-bead toughened cast nylon 6 composite material and preparation method thereof
  • Polyurethane-coated hollow glass micro-bead toughened cast nylon 6 composite material and preparation method thereof
  • Polyurethane-coated hollow glass micro-bead toughened cast nylon 6 composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This embodiment provides a method for preparing a polyurethane-coated hollow glass microsphere toughened cast nylon 6 composite material, which specifically includes the following steps:

[0027] (1) Weigh 10g of ethylene glycol and dissolve it in 140g of acetone solvent to make solution A with a concentration of 6.67%; weigh 73.5g of diphenylmethane diisocyanate (MDI) and dissolve it in 700g of acetone solvent to make a concentration of 9.50% solution B;

[0028] Mix solution A and solution B, and form a uniform mixed solution after stirring, shaking, and ultrasonication; wherein, the mixed system contains 10g (0.147mol) of ethylene glycol, 73.5g (0.294mol) of diphenylmethane Isocyanate (MDI), the ratio of the amount of hydroxyl substances in the mixed solution to the amount of isocyanate group substances is 1:2;

[0029] Add the mixed solution into a high-pressure sprayer, spray the mixed solution on the surface of the glass beads by spraying, and stir rapidly to mak...

Embodiment 2

[0037]This embodiment provides a method for preparing a polyurethane-coated hollow glass microsphere toughened cast nylon 6 composite material, which specifically includes the following steps:

[0038] (1) Weigh 9.2g of glycerol, dissolve it in 40g of benzene solvent, and make a solution A with a concentration of 18.70%; weigh 31.32g of 2,4-toluene diisocyanate (TDI) and dissolve it in 150g of benzene solvent In, be made into the solution B that concentration is 17.21%;

[0039] Mix solution A and solution B, and form a uniform mixed solution after stirring, shaking and ultrasonication. The mixed system contains 9.2g (0.1mol) glycerol, 31.32g (0.18mol) 2,4-toluene di isocyanate), the ratio of the amount of hydroxyl substances in the mixed solution to the amount of isocyanate group substances is 1:1.2;

[0040] Add the mixed solution into a high-pressure sprayer, spray the mixed solution on the surface of the glass beads by spraying, and stir rapidly to make the surface of the...

Embodiment 3

[0047] This embodiment provides a method for preparing a polyurethane-coated hollow glass microsphere toughened cast nylon 6 composite material, which specifically includes the following steps:

[0048] (1) Weigh 12g of polyethylene glutarate with a molecular weight of 800, dissolve it in 200g of ethyl acetate solvent, and make solution A with a concentration of 10.71%; weigh 3.78g of hexamethylene diisocyanate (HDI) was dissolved in 100g of ethyl acetate solvent to prepare a solution B with a concentration of 3.64%;

[0049] Mix solution A and solution B, and make the two solutions form a uniform mixed solution through stirring, shaking and ultrasonication. The mixed system contains 12g (0.015mol) of polyethylene glycol glutarate, 3.78g of hexamethylene diisocyanate (HDI) (0.0225mol), the amount of hydroxyl substances in the mixed solution is equal to the amount of isocyanate group substances The ratio is 1:1.5;

[0050] Add the mixed solution into a high-pressure sprayer, ...

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Abstract

The invention provides a polyurethane-coated hollow glass micro-bead toughened cast nylon 6 composite material preparation method, which specifically comprises: coating the surfaces of hollow glass micro-beads with a polyhydroxy raw material according to a certain ratio in a spraying manner, mixing with diisocyanate, carrying out in-situ polymerization on the surfaces of the hollow glass micro-beads at a proper polymerization temperature to prepare polyurethane-coated hollow glass micro-beads, intermittently adding lactam, the polyurethane coated hollow glass micro-beads, a catalyst and an activating agent into a reaction kettle according to a certain ratio, carrying out pre-polymerization activation, injecting the hot slurry with a certain viscosity into a hot mold, carrying out polymerization curing, and carrying out cooling demolding to prepare the composite material. According to the invention, hollow glass micro-beads are coated with polyurethane to toughen nylon, so that the toughness of the composite material can be improved on the premise of no reducing of the strength, the modulus, the rigidity, the hardness and the heat resistance of the composite material.

Description

technical field [0001] The invention relates to the technical field of polymer material preparation, in particular to a polyurethane-coated hollow glass microsphere toughened cast nylon 6 composite material and a preparation method thereof. Background technique [0002] Lactam belongs to heterocyclic ring, with high ring tension and tendency of ring opening. Using basic catalyst can initiate anionic polymerization to obtain monomer cast nylon (MCPA). Monomer cast nylon has more advantages than ordinary polycondensed nylon, mainly in that the molecular weight is as high as 70,000 to 100,000, which is more than twice that of ordinary polycondensed nylon, and the molecular weight distribution is narrower; the mechanical properties are better than polycondensed nylon; the reaction speed is fast and the polymerization The temperature is low, and the catalyst, activator, and molten monomer are injected into the hot mold under normal pressure, and the solid product can be polymeriz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/08C08K9/10C08K7/28C08G18/76C08G18/32C08G18/42C08G18/73
CPCC08G63/08C08K9/10C08K7/28C08G18/7671C08G18/7614C08G18/3206C08G18/4238C08G18/73
Inventor 夏学莲史向阳赵军伟赵海鹏赵振新刘伟党丽赟梁浜雷李翔李辉郭靖怡谭延方顾昱董天阳崔鑫蕊郭康胡婉莹杨铸山章渝仟王依娜秦留洋吴志羽户洹菁马一超张越新靳龙萍王耀胡赛楠
Owner HENAN UNIV OF URBAN CONSTR
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