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Transparent water soluble resin

A water-soluble resin, transparent technology, applied in instruments, educational appliances, teaching models, etc., can solve the problems of high water content, insufficient hardness, and fragility of the colloid, and achieve the effect of improving ornamental value, increasing hardness, and facilitating embedding

Inactive Publication Date: 2012-09-26
CHONGQING NORMAL UNIVERSITY
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Problems solved by technology

[0002] At present, the commonly used methods for making embedded biological specimens are as follows: the first is to use urea-formaldehyde resin to embed biological specimens, which has the advantage of low cost; Easy to crack, the success rate is extremely low, and the resin produced has no toughness and is brittle
The second is to add polyvinyl alcohol to the urea-formaldehyde resin. Although the success rate of this method is slightly higher than that of the first method, the success rate is generally relatively low.
The third is the transparent water-soluble resin used for embedding small biological specimens provided by Chinese patent CN 100569854C. The biological specimens embedded in this product have the advantages of not easy to crack, flexible, good transparency and high success rate, but due to the use of The hardness of the resin after molding is not enough, so it is not convenient for post-processing such as polishing and modeling

Method used

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Effect test

Embodiment 1

[0011] First, 750 grams of polyethylene glycol with a molecular weight of 600 was mixed with 250 grams of polyvinylpyrrolidone, and when the temperature was maintained at 25 to 30 °C, a solution was obtained after stirring and until it was completely dissolved. 10% of the total volume of 100ml of the glue, add the coagulant glacial acetic acid, i.e. 10ml, stir well and use a vacuum pump for 2-5min until no large amount of air bubbles are generated, let it stand until there are no more air bubbles on the surface to get transparent A water-soluble resin that can be used to embed small biological specimens.

Embodiment 2

[0013] First, mix 800 grams of polyethylene glycol with a molecular weight of 600 and 200 grams of polyvinylpyrrolidone, keep the temperature at 25 to 30 ° C, stir, and obtain a solution after it is completely dissolved, and then take 25 ml of the solution and 75 ml of transparent urea-formaldehyde resin solution. 5% of the total volume of 100ml of glue, add 5 ml of coagulant glacial acetic acid, stir well and use a vacuum pump for 2 to 5 minutes until no large amount of bubbles are generated, let it stand until there are no more bubbles on the surface to get transparent A water-soluble resin that can be used to embed small biological specimens.

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Abstract

The invention provides a transparent water soluble resin. The preparation method of the transparent water soluble resin comprises: mixing polyethylene glycol and polyvinylpyrrolidone according to a weight ratio of 1:0.25-0.35, keeping temperature at 25 to 30 DEG C, stirring till the polyvinylpyrrolidone dissolves completely to obtain solution, mixing the solution and transparent urea formaldehyderesin solution according to a volume ratio of 1:3-4 to obtain glue solution, adding glacial acetic acid serving as a coagulator in an amount which is 5 to 15 percent based on the volume of the glue solution, fully stirring, pumping air for 2 to 5 minutes by using a vacuum pump till a large amount of air bubbles are not generated, standing till on air bubbles are generated on surface, and obtaining the transparent water soluble resin. The molecular weight of the polyethylene glycol is 600. The polyethylene glycol has the advantages of high success rate of the coating of biological specimens, easy cracking prevention, transparency and certain hardness, and can be used for post treatment in polishing, shaping and the like and preserve the original shape of biological specimen for a longer time.

Description

technical field [0001] The invention relates to a resin for embedding biological specimens, in particular to a transparent water-soluble resin. Background technique [0002] At present, the commonly used methods for making embedded biological specimens are as follows: the first is to use urea-formaldehyde resin to embed biological specimens, which has the advantage of low cost; It is easy to crack, the success rate is extremely low, and the resin produced is inflexible and brittle. The second is to add polyvinyl alcohol to the urea-formaldehyde resin. Although the success rate of this method is slightly higher than that of the first, the success rate is generally relatively low. The third one is a transparent water-soluble resin for embedding small biological specimens provided by Chinese patent CN 100569854C. The biological specimens embedded by this product have the advantages of not being easily cracked, flexible, and having good transparency and high success rate. The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L71/08C08L39/06C08L61/24G09B23/38G09B23/36
Inventor 唐安科赵元莙唐发辉胡先成
Owner CHONGQING NORMAL UNIVERSITY
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