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Preparation method of antibacterial polyurethane automobile shock damping bumper block

A technology for automobile shock absorption and buffer blocks, which is applied in the field of preparation of antibacterial polyurethane automobile buffer blocks, can solve the problems of yellowing of light-colored products, poor heat resistance, short validity period, etc., to solve unstable and easy hydrolysis and improve antibacterial performance. Effect

Inactive Publication Date: 2014-01-22
奥斯汀新材料(张家港)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polyurethane products are easily hydrolyzed by fungi under suitable temperature and humidity conditions, aging and producing discoloration and odor, resulting in material breakage and yellowing of light-colored products. However, the polyurethane automobile buffer blocks currently produced in China cannot meet the anti-microbial and bacterial resistance requirements. requirements, so it can only be used in the low-end automotive market
The preparation of antibacterial automobile buffer blocks in the world originated in the 1990s, mainly based on inorganic silver ion antibacterial agents and organic vanillin antibacterial agents. However, these antibacterial agents are poor in heat resistance, easy to hydrolyze, and have a short validity period. High-end automotive market needs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] After the polyester polyol component with a number average molecular weight of 2000±200 is melted in an oven at 70-75° C., no antibacterial agent is added. Add 1g of N,N-dipropyl-1-propylamine, 15g of sodium dimethyl sulfonate isophthalate, 1g of water, and 1g of organosiloxane into the polyol in 500g of the polyester polyol directly through the feed pump. Alcohol kettle. Raise the temperature of the material in the kettle to 80° C., add 1250 g of 4,4-diphenylmethane diisocyanate under the protection of nitrogen, and keep it warm for 2 hours to obtain a prepolymer with an -NCO content of 8%. The prepolymer and polyol were mixed and poured into a mold at 90° C. according to a mass ratio of 1.5:1, and the mixing speed of the mixing head was 15,000 revolutions / min. After pre-curing in an oven at 90°C for 5 hours, demoulding, and then aging in an oven at a temperature of 70°C for 24 hours, the finished product and test piece A were obtained.

Embodiment 2

[0026] Number-average molecular weight is after the polyester polyol component of 2000 ± 200 is melted in 70~75 ℃ oven, under the situation of fully stirring (stirring speed 500 revs / min), add the sorbic acid of 0.5% of polyol quality, Stirring was continued for 15 min. Add 1g of N,N-dipropyl-1-propylamine, 15g of sodium dimethyl sulfonate isophthalate, 1g of water, and 1g of organosiloxane into the polyol in 500g of the polyester polyol directly through the feed pump. Alcohol kettle. Raise the temperature of the material in the kettle to 80° C., add 1250 g of 4,4-diphenylmethane diisocyanate under the protection of nitrogen, and keep it warm for 2 hours to obtain a prepolymer with an -NCO content of 8%. The prepolymer and polyol were mixed and poured into a mold at 90° C. according to a mass ratio of 1.5:1, and the mixing speed of the mixing head was 15,000 revolutions / min. After pre-curing in an oven at 90°C for 5 hours, demoulding, and then aging in an oven at a temperatu...

Embodiment 3

[0028] After the polyester polyol component with a number average molecular weight of 2000±200 melts in an oven at 70 to 75°C, under the condition of sufficient stirring (stirring speed 500 rpm), add 2% chitosan of polyol quality , naphthalene polyphenols, bacteriocin and lysozyme mixture (arbitrary ratio), continue to stir for 15min. Add 1g of N,N-dipropyl-1-propylamine, 15g of sodium dimethyl sulfonate isophthalate, 1g of water, and 1g of organosiloxane into the polyol in 500g of the polyester polyol directly through the feed pump. Alcohol kettle. Raise the temperature of the material in the kettle to 80° C., add 1250 g of 4,4-diphenylmethane diisocyanate under the protection of nitrogen, and keep it warm for 2 hours to obtain a prepolymer with an -NCO content of 8%. The prepolymer and polyol were mixed and poured into a mold at 90° C. according to a mass ratio of 1.5:1, and the mixing speed of the mixing head was 15,000 revolutions / min. Pre-cured in an oven at 90°C for 5 ...

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PUM

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Abstract

The invention discloses a preparation method of an antibacterial polyurethane automobile shock damping bumper block. The method comprises the following steps: 1) preparing an antibacterial polyalcohol; 2) preparing a prepolymer; 3) molding by casting; 4) precuring and demolding; and 5) post-curing to obtain the antibacterial polyurethane automobile shock damping bumper block. On the premise of maintaining the dynamic fatigue deformation rate and comprehensive mechanical performance of the bumper block, the antibacterial property of the automobile bumping block is improved. According to the preparation method of the environmentally-friendly antibacterial polyurethane automobile shock damping bumper block, a natural biological antibacterial agent is adopted to overcome the defect that other antibacterial agents are not stable and are easily hydrolyzed, and the requirement of medium and high end automobile market for the antibacterial property of the automobile bumper block is fulfilled.

Description

technical field [0001] The invention relates to a preparation technology of a polyurethane automobile shock-absorbing buffer block, in particular to a preparation method of an antibacterial polyurethane automobile buffer block. Background technique [0002] Because polyurethane microcellular elastomer has excellent mechanical properties of static compression and dynamic fatigue durability, it is especially suitable for anti-seismic and damping systems, and the application of polyurethane microcellular automobile buffer blocks is the largest. However, polyurethane products are easily hydrolyzed by fungi under suitable temperature and humidity conditions, aging and producing discoloration and odor, resulting in material breakage and yellowing of light-colored products. However, the polyurethane automotive buffer blocks currently produced in China cannot meet the anti-microbial and bacterial requirements. requirements, so it can only be used in the low-end car market. The prep...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/76C08G18/42C08G18/10C08L75/06C08J7/00B29B7/00B29C39/02B29C39/44
Inventor 李敏超承黎明陈海风艾玲
Owner 奥斯汀新材料(张家港)有限公司
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