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Synthesis method for phenolic resin for coated abrasive polyester fabric treatment

A synthesis method and a technology of coated abrasives, which are applied in fiber processing, textiles and papermaking, fiber types, etc., can solve the problems of polyester cloth stability, difficulty in greatly improving strength, and high cost, so as to promote dissolution performance , The effect of facilitating construction

Active Publication Date: 2012-07-25
SHANDONG SHENGQUAN NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since phenolic resin is a molecule with strong polarity, polyester cloth itself is relatively non-polar, so it is difficult to greatly improve the stability and strength of polyester cloth treated in this way, which affects the coating obtained in subsequent operations. Attachment performance has a great influence on
There are also polyester cloths treated with epoxy resin and polyurethane resin, but the cost of these two is too high, and there are also heat resistance problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 500g of phenol, 50g of xylene resin, and 5g of sulfuric acid were put into a reaction flask equipped with stirring, a thermometer, and a reflux device, and the temperature was raised to 130°C for constant temperature reaction for 3 hours, then cooled to 75°C, and 25g of sodium hydroxide was added, and 320g of formaldehyde (37 %), adjust the temperature to 75°C for 2 hours, add the remaining formaldehyde 320g (37%), keep the temperature at 75°C until the gelling time is 6min / 130°C, remove water under reduced pressure until the viscosity is 720cp25°C, add 35g of propylene glycol methyl ether acetate , Viscosity 290cp25 ℃, discharge.

Embodiment 2

[0024] 500g of phenol, 100g of xylene resin, and 5g of sulfuric acid were put into a reaction flask equipped with stirring, a thermometer, and a reflux device, and the temperature was raised to 130°C for constant temperature reaction for 4 hours, then cooled to 75°C, and 25g of calcium hydroxide was added, and 320g of formaldehyde (37 %), adjust the temperature to 75°C for 2 hours, add the remaining formaldehyde 320g (37%), keep the temperature at 75°C until the gelling time is 6min / 130°C, remove water under reduced pressure until the viscosity is 1300cp25°C, add 76g of methanol, the viscosity is 310cp25°C ,Discharge.

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PUM

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Abstract

The invention discloses a synthesis method for a phenolic resin for coated abrasive polyester fabric treatment. The method comprises the following steps of: (1) adding 100 weight parts of phenol, 1 to 50 weight parts of xylene resin and 0.3 to 3 weight parts of acid catalyst into a reactor, raising the temperature to between 130 and 150 DEG C and keeping the temperature for 3 to 5 hours, and reducing the temperature to between 60 and 80 DEG C; (2) adding 2 to 10 weight parts of basic catalyst and aldehyde which accounts for 50 percent of total amount of aldehyde into the reactor in the step (1), and keeping the temperature between 60 and 80 DEG C for 2 hours, wherein the molar ratio of the aldehyde to phenol is 0.5-2.0:1; (3) adding rest 50 percent of aldehyde into the reactor in the step(2), and keeping the temperature between 60 and 80 DEG C for 2 to 4 hours; (4) distilling under reduced pressure and dehydrating the product in the step (3) until the moisture content is less than orequal to 10 percent; and (5) adding an organic solvent into the product in the step (4), and adjusting the viscosity to be 200 to 1,000cp at the temperature of 25 DEG C. The synthesized resin is suitable for treating and impregnating coated abrasive fabrics, particularly impregnating coated abrasive polyester fabrics.

Description

technical field [0001] The invention relates to the technical field of phenolic resins, in particular to a method for synthesizing phenolic resins used for processing coated abrasive polyester cloth. Background technique [0002] Abrasives used to grind materials are called industrial teeth. Coated abrasives, that is, coated abrasives on flexible substrates, account for an increasing share of abrasives due to their unique properties. With the continuous improvement of industrial requirements, coated abrasives based on cotton cloth are no longer suitable for the requirements in many fields, and polyester cloth substrates with higher tensile strength and better dimensional stability are used in coating The dominant position in the application of abrasive tools has gradually become prominent, and it is suitable for zirconium corundum and chrome corundum abrasive belts with higher grinding efficiency and effect. [0003] As the coated substrate of abrasive tools, polyester clo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G10/04C08G8/28C08G8/10D06M15/41D06M101/32
Inventor 唐路林邢介名姜广锋
Owner SHANDONG SHENGQUAN NEW MATERIALS CO LTD