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Resorcinol aldehyde resin formed by modification of olefin and aromatic hydrocarbon and production process thereof

A technology of resorcinol aldehyde and resorcinol, which is applied in the field of resorcinol aldehyde resin and its production process, can solve the problems of potential safety hazards, inconvenient use, and high viscosity of rubber materials, so as to improve product performance, solve Blooming problem, good compatibility effect

Inactive Publication Date: 2013-05-22
SHANDONG ZHANHUA OSITER CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, B-20S resorcinol resin products have been applied in China, which can completely solve the problem of blooming, but at the same time, it is found that there are still shortcomings in the application process of this type of resin, because resorcinol The application of formaldehyde resin products (such as B-20S) will cause the viscosity of the rubber compound to be high, resulting in high heat generation during processing, resulting in frosting on the surface of the rubber compound. For example, the Chinese patent No. CN 100487012C discloses An alkyl resorcinol formaldehyde resin, which is specifically obtained by alkylation reaction and hydroxylation reaction by resorcinol, formaldehyde, styrene, oxalic acid, water and 20% NaOH solution
The modified resorcinol formaldehyde resin replaces resorcinol and solves the environmental problems of fuming and choking. However, this product and the similar foreign product B-20S still have the problem of internal resistance causing the rubber to generate heat. This makes it inconvenient to use and also poses a security risk

Method used

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  • Resorcinol aldehyde resin formed by modification of olefin and aromatic hydrocarbon and production process thereof
  • Resorcinol aldehyde resin formed by modification of olefin and aromatic hydrocarbon and production process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Add 250g of resorcinol to a 1000ml reaction bottle, heat up to complete melting, then add 6g of sulfuric acid under stirring, start to add 55g of styrene dropwise when the temperature rises to 120°C, after about 30 minutes, keep the temperature for 30 Minutes, lower the temperature, then start to drop 110g of formaldehyde solution with a mass concentration of 36.5-37% at 105°C, and drop it for about 1 hour, after that, reflux reaction at 95-105°C for 30 minutes, then heat up and dehydrate, and the water will be completely removed Finally, add 60g of diisobutene dropwise, and react with 125-145°C for 1.5 hours, then neutralize with 20% NaOH aqueous solution, distill and dehydrate at 170°C for 120 minutes to remove small molecules, when the product softening point is 95°C When, free phenol 0.65%.

Embodiment 2

[0022] Into the 1000ml reaction bottle, add resorcinol 250g, water 150g is warmed up to dissolve completely, add H under stirring 2 SO 4 6g, when the temperature rises to 95°C, start to add 115g of formaldehyde solution with a mass concentration of 36.5-37%. Add 110g of a mixture of styrene and diisobutylene (50% by weight each) dropwise, and add dropwise at a temperature of 120-130°C, and react at 125-145°C for 1.5 hours after dropping, add 20% NaOH aqueous solution to neutralize, Distill at 180°C for 120 minutes to remove all water and small molecules. When the softening point of the product is 100°C, the free phenol is 0.6%.

[0023] Comparison of the application performance of the sample synthesized in the example and the imported B-20S (pure styrene modified) sample in the rubber compound:

[0024] Table 1 Comparison of physical properties of rubber compounds

[0025]

[0026] Table 2 Physical properties of vulcanizates

[0027] Variety Embodiment one ...

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PUM

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Abstract

The invention belongs to a raw material for chemical production, provides a modified resorcinol formaldehyde resin free of pollution and spray frost and small in internal resistance and a production process thereof, and discloses a resorcinol aldehyde resin formed by the modification of olefin and aromatic hydrocarbon. The resorcinol aldehyde resin is prepared from the following components in parts by weight: 22 to 25 parts of resorcinol, 10 to 11.5 parts of aldehydes, 5 to 6.5 parts of olefines, 5 to 6.5 parts of aromatic hydrocarbons, 0.2 to 0.8 part of vitriol, wherein after all the components have an alkylation reaction and a hydroxylation reaction, the resorcinol aldehyde resin is prepared.

Description

technical field [0001] The invention belongs to chemical production raw materials, and in particular relates to a resorcinol-formaldehyde resin for rubber products and a production process thereof. technical background [0002] At present, in the m-formula-white adhesive system used in the processing of rubber products such as tires and conveyor belts in China, resorcinol is still widely used as an acceptor, which is combined with a methylene donor to form a HRH direct adhesive system. to the bonding effect between rubber, nylon cord and steel wire surface, but because resorcinol is easy to sublime and smoke, it will generate irritating smoke in the production process of rubber compound, which will pollute the environment and endanger human health. At the same time, the product Because a certain amount of free resorcinol contained in the product will cause blooming phenomenon on the surface of the product, thereby affecting the quality of the product, therefore, it is urgent...

Claims

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Application Information

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IPC IPC(8): C08G8/30C08G8/22C08L21/00C08L61/14
Inventor 于冰于文明王明彦
Owner SHANDONG ZHANHUA OSITER CHEM
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