CN1117986A - Method for producing tannin-extract adhesive - Google Patents
Method for producing tannin-extract adhesive Download PDFInfo
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- CN1117986A CN1117986A CN 95103379 CN95103379A CN1117986A CN 1117986 A CN1117986 A CN 1117986A CN 95103379 CN95103379 CN 95103379 CN 95103379 A CN95103379 A CN 95103379A CN 1117986 A CN1117986 A CN 1117986A
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- tannin
- extract
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- resol
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Abstract
The present invention provides a set of preparation processes of tannin extract adhesive. As compared with existent techniques said invention features simple preparation process, low cost, less pollution and good quality. The tannin extract adhesive prepared by using said invention can be substituted for phenolaldehyde resin adhesive to glue various artificial boards.
Description
Task of the present invention provides one group of gluing manufacture method 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.With the larch-tree bark extract of hot water lixiviate-be 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 parts of tannin extract solution and 17-25 parts of resol synthetic tannin-extract adhesives, and price is low, pollutes for a short time, and viscosity increases slow, 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, partly is made up of production technique and composition of raw materials two, and the part by weight scope of its prescription exceeds 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 one group of method for producing tannin-extract adhesive is provided, the tannin-extract adhesive 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, free phenol and 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.
Because of phenol, formaldehyde, tannin extract synthetic tannin-extract adhesive, the expensive and consumption minimum of phenol price, the formaldehyde consumption is also little, and the low consumption of tannin extract price is many, so cost is low.
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 is identical with the Phenol aldehyde resin performance, 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 1819-3000 yuan of raw material costs, 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%, Phenol aldehyde resin free phenol content are 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, its feature: be composition of raw materials and manufacture method.
Feature 1: be one group of tannin-extract adhesive composition of raw materials, if make 100 kilograms of tannin-extract adhesives that are fit to various wood-based plates, its formulation weight percentage scope is 2.8-7.6 kilograms of industrial phenol, 9.2-15.2 kilograms of industrial formols, 2-5.7 kilograms of industrial sodium hydroxides, 29-35 kilograms of industry tannin extracts, 0-8 kilograms of industrial starch, 43.2-53.2 kilograms in water, tannin extract is that one or more mix use, according to the difference that various wood-based plates require tackiness agent, in the formulation weight percentage range, select various raw material Different Weight percentage.
Feature 2: be one group of method for producing tannin-extract adhesive, partly form by resol production technique and tannin-extract adhesive production technique two;
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 ℃, are reacting 240-270 minutes below 75 ℃, 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 various wood-based plates 75-83 parts of tannin extract basic solutions of difference requirement preparation to tackiness agent, continue to heat up 80 ℃ and react, add 25-17 parts of resol, reacting 60-150 minutes below 80 ℃, 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 the starch tackifier.
Claims (1)
- Method for producing tannin-extract adhesive of the present invention; the common technique feature of the tannin-extract adhesive of synthetic tannin-extract adhesive and prior art; be with tannin extract alkaline aqueous solution and the synthetic tannin-extract adhesive of resol; replace Phenol aldehyde resin to be used for the gummed of various wood-based plates; feature of the present invention; be with 75-83 parts of tannin extract basic solutions and 25-17 parts of synthetic tannin-extract adhesives of resol, prescription protection.Claim 1: one group of tannin-extract adhesive composition of raw materials, it is characterized in that if make 100 kilograms of tannin-extract adhesives that are fit to various wood-based plates, its weight percent scope is, contain 2.8-7.6 kilograms of industrial phenol, 9.2-15.2 kilograms of industrial formols, 2-5.7 kilograms of industrial sodium hydroxides, 29-35 kilograms of industry tannin extracts, 0-8 kilograms of industrial starch, 43.2-53.2 kilograms in water, tannin extract is that a kind of tannin extract or two or more tannin extract mix use, to the different requirements of tackiness agent, selects various raw material Different Weight percentage in composition of raw materials weight percent scope according to various wood-based plates.Claim 2: one group of method for producing tannin-extract adhesive, its feature partly is made up of resol production technique and tannin-extract adhesive production technique two;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 ℃, are reacting 40 ℃ of blowings of cooling in 240-270 minutes 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 parts of tannin extract basic solutions is joined in the difference requirement of tackiness agent, continue to heat up 80 ℃, add 25-17 parts of resol, carried out building-up reactions 60-150 minutes, 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 the starch 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 true CN1117986A (en) | 1996-03-06 |
| CN1064067C 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) |
Cited By (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 |
| CN104312502A (en) * | 2014-11-10 | 2015-01-28 | 台州市顶立胶粘剂有限公司 | Novel starch-based quebracho tannin extract aldehyde-free wood adhesive and preparation method thereof |
| CN106317134A (en) * | 2016-08-22 | 2017-01-11 | 西北农林科技大学 | Method for preparing glucose and gallic acid by hydrolyzing tannin extract through hydro-thermal method |
Family Cites Families (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 |
| CN1031512C (en) * | 1992-03-31 | 1996-04-10 | 中国林业科学研究院林产化学工业研究所 | Chinese black wattle tannin gum using active Bakelite as cross-linker |
-
1995
- 1995-05-07 CN CN95103379A patent/CN1064067C/en not_active Expired - Fee Related
Cited By (4)
| 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 |
| CN104312502A (en) * | 2014-11-10 | 2015-01-28 | 台州市顶立胶粘剂有限公司 | Novel starch-based quebracho tannin extract aldehyde-free wood adhesive and preparation method thereof |
| CN106317134A (en) * | 2016-08-22 | 2017-01-11 | 西北农林科技大学 | Method for preparing glucose and gallic acid by hydrolyzing tannin extract through hydro-thermal method |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1064067C (en) | 2001-04-04 |
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