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Preparation method for high-elastic damping natural rubber

A technology of natural rubber and natural latex, applied in the field of natural rubber for shock absorption and noise reduction rubber devices and its preparation, can solve the problems of low elasticity, dynamic mechanical properties (large heat generation, low tensile strength, etc.)

Active Publication Date: 2014-03-19
HAINAN NATURAL RUBBER IND GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High requirements for comfort and safety require higher and higher performance of shock-absorbing rubber. As far as natural rubber is concerned, at present, all-latex rubber (SCR WF) and 5# standard rubber (SCR 5#) have certain advantages in high-shock-absorbing products. Defects, such as low tensile strength, poor dynamic mechanical properties (high heat generation, low elasticity), etc., urgently need a high-elastic shock-absorbing natural rubber as a substitute

Method used

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  • Preparation method for high-elastic damping natural rubber
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  • Preparation method for high-elastic damping natural rubber

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Weigh 133g of lauric acid, and dissolve it with 80ml of ammonia water with a concentration of 17%, and prepare a solution with a concentration of 20% for subsequent use. This is ammonium laurate solution. Get 100kg of natural rubber latex, adjust its total solid dry content to be 30% with deionized water and ammonia water, and the ammonia content is 0.06%. Add the pre-prepared ammonium laurate solution with a concentration of 20% while stirring, then add 500g of KOH solution with a concentration of 20%, add 100g of protease solution with a concentration of 10% after 10 minutes, and finally add 2kg of whey culture solution , concentration is 20% brown sugar solution 500g. Then transfer the latex to the coagulation tank at 20-40°C and keep it for 13 hours. After it is completely solidified, crepe, granulate, rinse, dry, inspect and pack on the full latex production line to obtain high-elastic and shock-absorbing natural rubber.

Embodiment 2

[0023] Weigh 133g of lauric acid, and dissolve it with 80ml of ammonia water with a concentration of 17%, and prepare a solution with a concentration of 20% for subsequent use. This is ammonium laurate solution. Get 100kg of natural rubber latex, adjust its total solid dry content to 20% with deionized water and ammonia water, and the ammonia content is lower than 0.06%. Add the pre-prepared ammonium laurate solution with a concentration of 20% while stirring, then add 500g of KOH solution with a concentration of 20%, add 150g of protease solution with a concentration of 10% after 10 minutes, and finally add 3kg of whey culture solution , 500g of 20% white sugar solution, and then transfer the latex into the coagulation tank at 20-45°C and keep it warm for 10 hours. After it is completely solidified, crepe, granulate, rinse, dry, inspect and pack on the full latex production line. , to obtain high-elastic shock-absorbing natural rubber.

Embodiment 3

[0025] Weigh 180g of lauric acid, and dissolve it with 110ml of ammonia water with a concentration of 17%, and prepare a solution with a concentration of 20% for later use, which is ammonium laurate solution. Get 100kg of natural rubber latex, adjust its total solid dry content to 25% with deionized water and ammonia water, and the ammonia content is lower than 0.06%. While stirring, add the pre-prepared ammonium laurate solution with a concentration of 20%, then add 800g of KOH solution with a concentration of 20%, add 80g of low-temperature alkaline protease solution with a concentration of 10% after 10 minutes, and finally add 5kg of milk Clear culture fluid, concentration is 20% brown sugar solution 500g. Then transfer the latex into the coagulation tank and let it stand at room temperature for 20 hours. After it is completely solidified, crepe, granulate, rinse, dry, inspect, and pack on the full latex production line to obtain high-elastic and shock-absorbing natural rub...

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Abstract

The invention discloses a preparation method for high-elastic damping natural rubber, which includes the steps of sequentially adding ammonium laurate and alkali into fresh natural latex at the normal temperature, adding protease after 10 minutes, then adding microbial agent and sugar for microbial solidification, and curing for 8-20 hours prior to sequentially pressing to crease, pelletizing, eluting, drying, checking and packaging. During preliminary processing of the natural rubber, the protease is used for low-protein modification and biological solidification so as to decrease the nitrogen content of the natural rubber and improve elasticity and mechanical strength of the natural rubber. The invention aims to provide the high-performance natural rubber special for damping and noise reduction to replace a traditional smoked rubber sheet, traditional whole fraction (WF) rubber or traditional standard 5# rubber [such as SCR (styrene-butadiene rubber) 5#] and the like used for producing damping and noise-reducing devices, so that damping and noise-reducing effects are better, and development requirements of modern trains and automobiles are met.

Description

technical field [0001] The invention relates to a natural rubber for shock-absorbing and noise-reducing rubber devices on vehicles such as automobiles and trains and a preparation method thereof. Background technique [0002] With the advancement of science and technology and the improvement of people's living standards, modern vehicles are increasingly required to be high-speed, safe and comfortable. Now the speed of the train can be as high as 350km, so there are many problems that need to be solved urgently. Shock absorption is the primary task, and doing a good job of shock absorption can improve the driving comfort and safety of the train. And modern cars are increasingly demanding higher comfort and safety. There are many shock-absorbing measures for automobiles and trains, among which shock-absorbing rubber products are the most important aspect. High requirements for comfort and safety require higher and higher performance of shock-absorbing rubber. As far as natu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08C1/15C08L7/00
Inventor 白先权丁爱武黄向前贾笑英罗海珍林建海
Owner HAINAN NATURAL RUBBER IND GROUP