CN1064067C - Method for producing tannin-extract adhesive - Google Patents
Method for producing tannin-extract adhesive Download PDFInfo
- Publication number
- CN1064067C CN1064067C CN95103379A CN95103379A CN1064067C CN 1064067 C CN1064067 C CN 1064067C CN 95103379 A CN95103379 A CN 95103379A CN 95103379 A CN95103379 A CN 95103379A CN 1064067 C CN1064067 C CN 1064067C
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- China
- Prior art keywords
- tannin
- extract
- adhesive
- resol
- production technique
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Adhesives Or Adhesive Processes (AREA)
Abstract
The present invention provides a group of methods for manufacturing tannin-extract adhesive, which belongs to an invention in chemical engineering class, which relates to a manufacturing method for adhesive. Compared with the prior art, the present invention has the characteristics of easy manufacturing process, low cost, little pollution and high quality. The tannin-extract adhesive manufactured by the present invention can replace the phenol aldehyde resin to be used for gluing of various artificial boards.
Description
Task of the present invention provides the gluing manufacture method of a kind of tannin extract, belongs to the invention of chemical industry class about process for manufacturing adhesive.
The tannin-extract adhesive of prior art contains phenol and the formaldehyde amount is bigger, causes price expensive, and environmental pollution is bigger, and viscosity increases fast, and the active phase is short, can not be used for actual production.
External forestry of nineteen ninety is translated the larch-tree bark that utilizes of hollow field reality and is made tackiness agent.Setting this extract one with the larch-tree of hot water lixiviate is tannin and non-tannis ... be tannin extract Deng the mixture common name of material, again 70 parts of extract solution and 30 parts of resol are made tackiness agent, the bonding strength of compacting glued board reaches standard, and because of price expensive, viscosity increases fast, can not be used for actual production.
The present invention is with 75-83 part tannin extract solution and 17-25 part resol synthetic tannin-extract adhesive, and price is low, pollutes for a short time, and viscosity increases slowly, reaches the requirement of various Wood-based Panel Production.
The present inventor applies for that No. 89103088.3 tannin-extract adhesives are product inventions, what is claimed is the tannin-extract adhesive prescription, recalls because of no manufacture method is imperfect again.This time invention is a method for producing tannin-extract adhesive, is made up of production technique and composition of raw materials two portions, and the part by weight scope of its prescription surpasses No. 89103088.3 formula range.
The object of the invention: be that to overcome the tannin-extract adhesive price of prior art expensive, pollute greatly that viscosity increases fast problem, and a kind of method for producing tannin-extract adhesive is provided, the tannin extract tackiness performance of manufacturing has also had raising.
Technical solution of the present invention: be earlier small amount of phenol, formaldehyde, sodium hydroxide to be reacted below 75 ℃, novolak resin, add volume tannin extract alkaline aqueous solution again, at resol below 80 ℃ and the synthetic tannin-extract adhesive of tannin extract alkaline aqueous solution reaction, its technology is simple.
Phenol and formaldehyde are under the sodium hydroxide katalysis, low temperature fully reacts a little less than the synthetic reactive modified phenolic resin ability, the speed of response of slowing down resol and tannin extract alkaline aqueous solution, and viscosity increases slow, can control level of response, be fit to of the requirement of various wood-based plates tackiness agent viscosity.
Synthetic resol contains free phenol and the aldehyde amount is few because of phenol and formaldehyde fully react, afterwards when resol and tannin extract solution reaction, the free phenolic aldehyde further with the tannin extract solution reaction, so the synthetic tannin-extract adhesive contains free phenol and the aldehyde amount is atomic, environmental pollution is minimum.
Positively effect of the present invention: the tannin-extract adhesive that the present invention makes compares with similar tannin-extract adhesive, the tannin-extract adhesive of prior art adds the resol amount more than 30%, the resol amount 17-25% that the tannin-extract adhesive that the present invention makes adds has reduced the cost of tackiness agent.
The tannin-extract adhesive that the present invention makes can be identical with the resol dissolubility, replace Phenol aldehyde resin to use the gummed of various wood-based plates, this glue and Phenol aldehyde resin are relatively, reduce phenol usage 71.5-91.5%, reduce formaldehyde consumption 65.4-82%, reduce raw material cost 1819-3000 gram, economical effectiveness is good especially.
The tannin-extract adhesive free phenol content 0-0.3% that the present invention makes, similar tannin-extract adhesive free phenol content 1.4%, phenolic aldehyde power fat glue free phenol content is more than 1.5%, and because of free phenol content is few, this glue environmental pollution is minimum.
The said method for producing tannin-extract adhesive of the present invention is characterized in that: be composition of raw materials and manufacture method.
Feature 1: be a kind of tannin-extract adhesive composition of raw materials, it is characterized in that: tannin extract accounts for more than 30%, and phenol accounts for 5.3%, and formaldehyde (100%) accounts for 4.18%, and alkali accounts for about 2.68%, and tackifier account for 1.8-5%.If make 100 kilograms of tannin-extract adhesives that are fit to various wood-based plates, its formulation weight percentage scope is industrial phenol 2.8-7.6 kilogram, industrial formol 9.2-15.2 kilogram, industrial sodium hydroxide 2-5.7 kilogram, industrial tannin extract 29-35 kilogram, tackifier 0-8 kilogram, water 43.2-53.2 kilogram, tannin extract is that one or more mix use, according to the difference that various wood-based plates require tackiness agent, selects various raw material Different Weight percentage in the formulation weight percentage range.
Feature 2: be a kind of method for producing tannin-extract adhesive, form by resol production technique and tannin-extract adhesive production technique two portions;
The resol production technique, the phenol that will dissolve, aqueous sodium hydroxide solution add reactor, start agitator adding formaldehyde and carry out thermopositive reaction, make temperature rise to 50 ℃, reaction below 75 ℃ 240-270 minute, cool off 40 ℃ of blowings.
The tannin-extract adhesive production technique, water and sodium hydroxide are added reactor, start agitator, heat temperature raising adds tannin extract simultaneously, according to the difference requirement preparation 75-83 part tannin extract basic solution of various wood-based plates to tackiness agent, continue to heat up 80 ℃ and react, add 25-17 part resol, reaction below 80 ℃ 60-150 minute, when reaching various wood-based plates the viscosity of tackiness agent being required, cool off 35 ℃ of blowings, the tannin-extract adhesive that is used for glued board adds tackifier.
Claims (1)
- A kind of method for producing tannin-extract adhesive is characterized in that being made up of resol production technique and tannin-extract adhesive production technique two portions:The resol production technique, phenol that will dissolve and aqueous sodium hydroxide solution add reactor, start agitator and add formaldehyde, carry out thermopositive reaction, make temperature rise to 50 ℃, at 40 ℃ of blowings of the cooling in 240-270 minute of reaction below 75 ℃, the tannin-extract adhesive production technique, water and sodium hydroxide are added reactor, start agitator, heat temperature raising adds tannin extract simultaneously, according to wood-based plate 75-83 part tannin extract basic solution is joined in the difference requirement of tackiness agent, continue to heat up 80 ℃, add 25-17 part resol, carried out building-up reactions 60-150 minute, when reaching various wood-based plates tackiness agent viscosity being required, cool off 35 ℃ of blowings, the tannin-extract adhesive that is used for glued board adds tackifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95103379A CN1064067C (en) | 1995-05-07 | 1995-05-07 | Method for producing tannin-extract adhesive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95103379A CN1064067C (en) | 1995-05-07 | 1995-05-07 | Method for producing tannin-extract adhesive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1117986A CN1117986A (en) | 1996-03-06 |
| CN1064067C true CN1064067C (en) | 2001-04-04 |
Family
ID=5074687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95103379A Expired - Fee Related CN1064067C (en) | 1995-05-07 | 1995-05-07 | Method for producing tannin-extract adhesive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1064067C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102020957B (en) * | 2009-09-16 | 2013-04-10 | 北京化工大学 | Wood environmentally-friendly nontoxic adhesive and preparation method thereof |
| CN104312502B (en) * | 2014-11-10 | 2016-08-17 | 台州市顶立胶粘剂有限公司 | Non-formaldehyde wood adhesive based on starch and quebracho extract and preparation method thereof |
| CN106317134B (en) * | 2016-08-22 | 2018-09-14 | 西北农林科技大学 | A kind of method that hydro-thermal method hydrolysis tannin extract prepares glucose and gallic acid |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1047105A (en) * | 1989-05-06 | 1990-11-21 | 吉林林学院 | Baking glue adhesive agent |
| CN1065476A (en) * | 1992-03-31 | 1992-10-21 | 中国林业科学研究院林产化学工业研究所 | Reactive phenolic resin is the Chinese black wattle tanning gum of linking agent |
-
1995
- 1995-05-07 CN CN95103379A patent/CN1064067C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1047105A (en) * | 1989-05-06 | 1990-11-21 | 吉林林学院 | Baking glue adhesive agent |
| CN1065476A (en) * | 1992-03-31 | 1992-10-21 | 中国林业科学研究院林产化学工业研究所 | Reactive phenolic resin is the Chinese black wattle tanning gum of linking agent |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1117986A (en) | 1996-03-06 |
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