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Water soluble resin for impregnated paper backing plate and preparation method thereof

A technology of water-soluble resin and impregnated paper backing board, which is applied in papermaking, paper, textiles and papermaking, etc. It can solve the problems of reducing process safety, resin non-water solubility, environmental pollution, etc., and achieves strong toughness, stable emulsion, and reduced pollution effect

Active Publication Date: 2013-06-12
SHANDONG SHENGQUAN NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The Chinese patent "A Modified Liquid for Environmentally Friendly Filter Paper and Its Preparation Method" (Application No. 201110260427.1) mentions the method of mixing phenolic resin with emulsion. This method has no specific requirements for phenolic resin. If phenolic resin The resin is not suitable, and it is easy to cause demulsification during the mixing process, so it cannot be used
[0004] The Chinese patent "A Preparation Method of Cashew Nut Oil Modified Phenolic Resin" (Application No. 200710129766.X) mentions the method of using cashew nut oil modified phenolic resin for laminates. The resin provided by this method contains cashew nut oil long chain Aliphatic hydrocarbon substances and resins have no water solubility and can only be diluted with low-boiling organic solvents such as alcohols and ketones, which will easily cause environmental pollution and reduce the safety of the process

Method used

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  • Water soluble resin for impregnated paper backing plate and preparation method thereof
  • Water soluble resin for impregnated paper backing plate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Put 1000g of phenol and 200g of cashew nut oil into the reactor, start the reactor to stir, add 30g of sodium hydroxide, heat up to 130°C, phenolize for 2 hours, cool down to 80°C, add 1466g of formaldehyde (37% formaldehyde aqueous solution), Add 400g of polyvinyl acetate emulsion, continue the constant temperature reaction until the viscosity of the mixture reaches 50~150cp, cool down to below 40°C, and obtain the water-soluble resin for impregnating the paper pad.

Embodiment 2

[0032] Put 1000g of phenol and 300g of tung oil into the reaction kettle, start the reaction kettle to stir, add 30g of potassium hydroxide, heat up to 130°C, phenolize for 2 hours, cool down to 70°C, add 1293g of formaldehyde (37% formaldehyde aqueous solution), add 300g of styrene-acrylic emulsion, continue to react at constant temperature until the viscosity of the mixture reaches 50~150cp, cool down to below 40°C, and obtain a water-soluble resin for impregnating the paper backing board.

Embodiment 3

[0034] Put 1000g of phenol and 400g of cashew nut oil into the reactor, start the reactor to stir, add 50g of sodium carbonate, heat up to 130°C, phenolize for 2 hours, cool down to 70°C, add 1725g of formaldehyde (37% formaldehyde aqueous solution), add 500g of silicon-acrylic emulsion, continue to react at constant temperature until the viscosity of the mixture reaches 50~150cp, cool down to below 40°C, and obtain a water-soluble resin for impregnating the paper backing board.

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Abstract

The invention relates to a preparation method of a water soluble resin used for an impregnated paper backing plate. The method comprises the steps of: 1) mixing a hydroxyl-containing aromatic compound with cashew nut oil or tung oil; 2) adding a catalyst into the mixture, raising the temperature to 100DEG C-150DEG C, conducting phenolation for 1-3h, lowering the temperature to 60-90DEG C; and 3) adding aldehyde into the cooled mixture in step 2), then adding an emulsion, and then further letting them to undergo an isothermal reaction until the viscosity of a generated resin solution reaches 50-150cp, and lowering the temperature to less than 40DEG C, thus obtaining the water soluble resin. The water soluble resin for an impregnated paper backing plate provided in the invention has a stable emulsion and a long shelf life, and its performance indexes are all in line with the current standards.

Description

technical field [0001] The invention relates to a water-soluble resin for impregnating paper pads and a preparation method thereof, belonging to the field of organic polymer compounds. Background technique [0002] The impregnated paper backing board is made of paper as the base material, impregnated with resin adhesive and then hot pressed, and is mainly used as a special backing board for mechanical drilling. The surface of the board is required to be smooth, free of air bubbles, flower boards, reach a certain hardness, density, low warpage, good water resistance, low water absorption, and good heat resistance. At present, the impregnation resin of impregnated paper backing board is mainly phenol-modified cashew nut oil (or tung oil) resin, which is alcohol-soluble, and the addition of long-chain aliphatic hydrocarbon substances can increase the flexibility and wear resistance of the backing board. However, because alcohol solvents have certain hazards to the working envi...

Claims

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Application Information

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IPC IPC(8): C09J161/14C09J131/04C09J125/14C09J133/04C09J133/00C08G8/32D21H17/48
Inventor 江成真李枝芳张宝印隗骁健
Owner SHANDONG SHENGQUAN NEW MATERIALS CO LTD
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