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Bark powder phenolic-resin adhesive and preparation method thereof

A technology of phenolic resin and bark powder, applied in adhesives, aldehyde/ketone condensation polymer adhesives, adhesive types, etc., can solve the problems of high equipment corrosion, high equipment requirements, and low replacement rate. Achieve the effect of low production conditions, low price and good quality

Inactive Publication Date: 2010-10-27
内蒙古森工栲胶制品有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When chemically treating bark powder and wood powder, an acidic catalyst (such as sulfuric acid, etc.) is generally used to liquefy the bark powder under high temperature and high pressure. The disadvantage is that it is relatively corrosive to equipment and requires high temperature and high pressure conditions. Equipment requirements are relatively high, and the replacement rate is relatively low, only about 30%

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Bark powder phenolic resin adhesive formula and process:

[0029] Formula: 100 parts of phenol (solid), 125 parts of larch bark powder (solid), 70 parts of sodium hydroxide (solid), 5 parts of calcium sulfite (solid), 8 parts of anhydrous sodium sulfite (solid), formaldehyde (37% ) 275 parts, 236 parts of water.

[0030] Note: 70 parts of sodium hydroxide (solid) is prepared with 105 parts of water to make a 40% sodium hydroxide solution.

[0031] Process: start the reactor mixer, add 131g water, add 117g sodium hydroxide solution (40%), add bark powder 125g, add anhydrous sodium sulfite 8g, add calcium sulfite 5g, add 100g phenol, pass into steam and heat up to 110°C, keep warm for 2.5-3.0 hours. During the activation treatment stage of larch bark powder, the reaction kettle is required to be airtight to prevent the loss of moisture and phenol volatilization.

[0032] Turn off the steam valve to stop heating, and pass cold water to cool the feed liquid to 55°C, then...

Embodiment 2

[0035] Bark powder phenolic resin adhesive formula and process:

[0036] Formula: 100 parts of phenol (solid), 45 parts of larch bark powder (solid), 48 parts of sodium hydroxide (solid), 2 parts of calcium sulfite (solid), 4 parts of anhydrous sodium sulfite (solid), formaldehyde (37% ) 210 parts, 144 parts of water.

[0037] Note: 48 parts of sodium hydroxide (solid) is prepared with 72 parts of water to make a 40% sodium hydroxide solution.

[0038] Process: Start the reactor mixer, add 72g of water, add 80g of sodium hydroxide solution (40%), add 45g of larch bark powder, add 4g of anhydrous sodium sulfite, add 2g of calcium sulfite, add 100g of phenol, and feed steam to heat up To 110°C, keep warm for 2.5-3.0 hours. During the activation treatment stage of larch bark powder, the reaction kettle is required to be airtight to prevent the loss of moisture and phenol volatilization.

[0039] Turn off the steam valve to stop heating, and pass cold water to cool the feed liq...

Embodiment 3

[0042] The effects of using calcium sulfite and not using calcium sulfite on the curing rate and water-resistant bonding strength of larch bark powder phenolic resin adhesive were compared.

[0043] Formula and process:

[0044] Recipe and technology are except not using calcium sulfite, other are identical with embodiment 1. In order to verify the use of calcium sulfite on the curing rate and water-resistant bond strength. The testing of curing rate and water-resistant bonding strength is carried out according to the method specified in the national standard GB / T14074-2006.

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Abstract

The invention provides a bark powder phenolic-resin adhesive, which adopts an alkaline catalysis system with calcium sulfite to carry out activating treatment for bark powder, and uses the product by activating the bark powder replaces part of phenol to complete the preparation. The viscosity of the bark powder phenolic-resin adhesive in the invention is 200-2000 mPa.s and the solid content is 40-50%, wherein the substitution quantity of phenol is 35-55%. The invention has the advantages of good quality, reasonable price, low requirements for production conditions, small corrosiveness of the catalyst and the like, and can utilize the existing adhesive production equipment.

Description

technical field [0001] The invention relates to an adhesive, in particular to using bark powder, a renewable resource, to partially replace phenol, a petrochemical product, to produce a bark powder phenolic resin adhesive for wood. Background technique [0002] At present, using renewable resources to partially replace phenol, the main raw materials for the preparation of phenolic resin adhesives for wood include bark powder, wood powder, tannin extract, etc., of which bark powder and wood powder are in a natural combination state and cannot be directly utilized. After the pre-chemical treatment of bark powder and wood powder, the components that can produce condensation and polycondensation reactions with formaldehyde are freed, and these components are degraded appropriately to improve their reactivity. [0003] When chemically treating bark powder and wood powder, an acidic catalyst (such as sulfuric acid, etc.) is generally used to liquefy the bark powder under high temp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J161/12
Inventor 赵海峰康健李洪兵周广胜
Owner 内蒙古森工栲胶制品有限责任公司
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