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High-performance polyurethane for reaction injection molding and preparation method thereof

An injection molding, high-performance technology, which is applied in the field of high-performance reaction injection molding polyurethane and its preparation, can solve the problems of limited application range, low strength, and limited service life of buffer blocks, etc., to improve comprehensive performance, toughness, Increase the effect of intermolecular collisions

Inactive Publication Date: 2017-05-31
浙江吉高新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Reaction injection molding polyurethane has good cushioning performance as the material of automobile buffer block, but its strength is not high, which makes the service life of the buffer block limited, which greatly limits its scope of use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Dissolve 5g of γ-aminopropyltriethoxysilane and 15g of sodium dodecylbenzene sulfonate in 250g of ethanol to prepare 270g of mixed solution M, add 54g of attapulgite to the mixed solution, Heat and stir at 50°C for 40 minutes, while stirring with ultrasonic assistance, to obtain 70g of modified attapulgite;

[0022] (2) Mix 70g polyester polyol, 10g modified attapulgite, 4g 1,4-butanediol, 0.8g dibutyltin dilaurate, 1g triethylenediamine and 0.2g ethylene glycol. Component A;

[0023] (3) Mix 85g isocyanate, 6g sodium bicarbonate and 1g anti-aging agent to obtain component B;

[0024] (4) Put 70g of component A and 35g of component B into the two storage tanks of the high-pressure injection machine, and control their temperature to 50℃, and inject component A and component B into the heat-preserving mold at the same time. The temperature of the mold is maintained at 70°C, the mold is released after 2 minutes, the product is taken out, and cured at 120°C for 2 hours.

[00...

Embodiment 2

[0027] (1) Dissolve 5g of γ-(2,3-epoxypropoxy)propyltrimethoxysilane and 20g of sodium dodecylbenzenesulfonate in 250g of ethanol to prepare 275g of mixed solution M. Add 46g of attapulgite into it, heat and stir at 60°C for 30 minutes, while stirring with ultrasonic assistance, to obtain 55g of modified attapulgite;

[0028] (2) Mix 80g polyester polyol, 12g modified attapulgite, 3g sorbitol, 0.4g dibutyltin dilaurate, 0.5g triethylenediamine and 0.1g ethylene glycol to obtain component A;

[0029] (3) Mix 80g isocyanate, 5g sodium carbonate and 2g anti-aging agent to obtain component B;

[0030] (4) Put 70g of component A and 42g of component B into two storage tanks of the high-pressure injection machine, and control their temperature to 40℃, and inject component A and component B into the heat-preserving mold at the same time. The temperature of the mold is kept at 80°C, the mold is demolded after 2 minutes, the product is taken out, and cured at 120°C for 1 hour.

[0031] The me...

Embodiment 3

[0033] (1) Dissolve 5g of γ-methacryloxypropyltrimethoxysilane and 25g of sodium isethionate in 250g of ethanol to prepare 280g of mixed solution M, and add 35g of attapulgite to the mixed solution , Heating and stirring at 80°C for 20 minutes, while stirring with ultrasonic assistance, to obtain 42 g of modified attapulgite;

[0034] (2) Mix 85g polyester polyol, 15g modified attapulgite, 5g glycerin, 1.2g dibutyltin dilaurate, 1.5g triethylenediamine and 0.3g ethylene glycol to obtain component A;

[0035] (3) Mix 90g isocyanate, 8g sodium bicarbonate and 3g anti-aging agent to obtain component B;

[0036] (4) Put 70g of component A and 49g of component B into 2 storage tanks of the high-pressure injection machine, and control their temperature to 45℃, and inject both component A and component B into the heat-preserving mold at the same time. The temperature of the mold is maintained at 75°C, the mold is demolded after 2 minutes, and the product is taken out, and cured at 120°C fo...

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Abstract

The invention provides a high-performance polyurethane for reaction injection molding and a preparation method thereof. The high-performance polyurethane for reaction injection molding is composed of a component A and a component B. The component A comprises the following raw materials in parts by weight: 70-85 parts of polyester polyol, 10-15 parts of modified attapulgite, 3-5 parts of chain extender and 1-3 parts of composite catalyst. The component B comprises the following raw materials in parts by weight: 80-90 parts of isocyanate, 5-8 parts of foaming agent and 1-3 parts of antiaging agent. The mass ratio of the component A to the component B is 10:(5-7). The modified attapulgite is utilized to modify the polyurethane so as to increase the compatibility between the attapulgite and polyurethane material; a surfactant is utilized to modify the attapulgite so as to increase the surface area, and the modified attapulgite is combined with macromolecules to form the network structure; when the polymer is subjected to external force, the stress concentration can be changed, and a certain deformation energy can be absorbed, thereby preventing the destructive cracking, and enhancing the comprehensive properties of the polyurethane material.

Description

Technical field [0001] The invention belongs to the technical field of polymer materials, and mainly relates to a polyurethane for high-performance reaction injection molding and a preparation method thereof. Background technique [0002] Polyurethane is a polymer synthetic material with more carbamate groups in the main chain. So far, no polymer can be used in various fields such as plastics, rubber, synthetic fibers, coatings and adhesives like polyurethane. Can be widely used. Polyurethane elastomer (PUE), as one of the branches of polyurethane materials, has excellent mechanical properties, good wear resistance and chemical stability. It can be widely used as structural parts in automobiles, machinery, mining, home appliances, and textiles. And other fields. PUE is a typical multi-block copolymer, which is composed of hard and soft segments. With the help of molecular design principles, its performance can be changed by adjusting the length, distribution, crosslinking densi...

Claims

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Application Information

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IPC IPC(8): C08G18/42C08G18/66C08K9/06C08K3/34C08L75/06C08J9/08
CPCC08G18/42C08G18/664C08G18/6644C08J9/08C08J2375/06C08K3/346C08K9/06C08L75/06
Inventor 于冰钭家燕
Owner 浙江吉高新材料有限公司
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