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Alkyl resorcinol formaldehyde resin and its production process

An alkyl resorcinol formaldehyde resin and production process technology, applied in the field of chemical production raw materials, can solve the problems of irritating smog, polluting the environment, frosting, etc., achieve the effect of no frosting and improve product quality

Inactive Publication Date: 2009-05-13
于文明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the domestic production of rubber products such as tires and steel wire rope conveyor belts uses resorcinol and resorcinol formaldehyde resin (RF) as additives, and there are problems of pollution and product blooming in the production process
When resorcinol or a compound of resorcinol and other organic or inorganic carriers is used as a donor, it can form a HRH direct bonding system with the methylene in the rubber to form a direct bonding system for rubber and nylon cords and steel wires. Surface adhesion, but in the process of mixing with rubber, resorcinol will be sublimated and smoked, thereby generating irritating smoke and polluting the environment; at the same time, the product contains a certain amount of free resorcinol , causing the product to bloom and affect the quality of the product

Method used

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  • Alkyl resorcinol formaldehyde resin and its production process
  • Alkyl resorcinol formaldehyde resin and its production process

Examples

Experimental program
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Effect test

Embodiment 1

[0008] Example 1: Add 250g of resorcinol to a 500ml reaction bottle, heat up to complete melting, then add 6g of oxalic acid with stirring at about 115°C, and start adding styrene dropwise when the temperature rises to 120-125°C for about 30 minutes After dripping 105g of styrene, keep this temperature for 30 minutes, then start to add 110g of formaldehyde solution dropwise at 100-105°C under stirring, drop it for about 1 hour, then reflux for 30 minutes, then heat up and dehydrate, and the water will be completely removed Then add 25g of styrene and react at 120-125°C for 30 minutes, then neutralize with 20% NaOH aqueous solution to neutralize, distill and dehydrate and remove small molecules, and control the softening point of the product at 90-120°C to be qualified. The softening point of the experimental product is 109°C, the free phenol is 0.6%, and the yield is 385g.

Embodiment 2

[0009] Example 2: In a 500ml reaction bottle, add 250g of resorcinol and 100g of water and heat up to dissolve, add 6.5g of oxalic acid under stirring, when the temperature rises to 90°C, start to add 115g of formaldehyde dropwise, and control the temperature at 90-110°C to complete the dropwise After formaldehyde, heat up to distill and dehydrate. When the room temperature reaches 120°C, start to add styrene dropwise, and control the temperature at 120-130°C to drop 110g of styrene and then react for 30 minutes, add 20% NaOH solution to neutralize , and then distilled to remove water and small molecules, the measured softening point was 103°C, the free phenol was 0.95%, and the yield was 370g.

Embodiment 3

[0010] Example 3: Put 220g of resorcinol into a 500ml reaction bottle and heat it up until it melts, add 6.3g of oxalic acid at 120°C, then add 95g of styrene dropwise at 120-130°C, and react at this temperature for 30 minutes after dropping , when the temperature is lowered to 110°C, drop 100.3g of formaldehyde and react at 100-105°C for 1 hour and 30 minutes, heat up and dehydrate, and when the temperature reaches 125°C, add 22g of styrene dropwise and react at this temperature After 30 minutes, after being neutralized with 20% NaOH, heat up and distill and dehydrate, take a sample to measure the softening point, when the softening point is 115°C, discharge, measure 0.45% of free resorcinol, yield 345g.

[0011] The free resorcinol of alkylresorcinol formaldehyde resin and RF resin is compared as shown in table 1: table 1

[0012] Variety RF resin Embodiment one Embodiment two Embodiment Three free resorcinol

[0013] Therefore, this product is an alkyl...

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Abstract

The invention provides an alkyl resorcinol formaldehyde resin for the production of rubber products including tires and wire rope conveying belts, as well as the production process. The resin comprises the following substances: resorcinol 22-25 parts, formaldehyde 10-11.5 parts, phenylethene 11-13 parts, oxalic acid 0.5-0.8 part, water 8-12 parts, and 20% of NaOH solvent. The production process comprises alkylation reaction and hydroxylation.

Description

technical field [0001] The invention belongs to chemical production raw materials, in particular to an alkyl resorcinol formaldehyde resin and a production process for producing rubber products such as tires and steel wire rope conveyor belts. technical background [0002] At present, the domestic production of rubber products such as tires and wire rope conveyor belts uses resorcinol and resorcinol formaldehyde resin (RF) as additives, which have problems of pollution and product blooming during the production process. When resorcinol or the compound of resorcinol and other organic or inorganic carriers is used as the donor, it can form a HRH direct bonding system with the methylene in the rubber to form a direct bonding system for rubber and nylon cords and steel wires. Surface adhesion, but in the process of mixing with rubber, resorcinol will be sublimated and smoked, thereby generating irritating smoke and polluting the environment; at the same time, the product contain...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G8/22
Inventor 王明彦于冰于文明
Owner 于文明
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