CN1202193C - Two-in-one urea-fomaldehyde adhisive and emulsified wax production process - Google Patents
Two-in-one urea-fomaldehyde adhisive and emulsified wax production process Download PDFInfo
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- CN1202193C CN1202193C CN 02109957 CN02109957A CN1202193C CN 1202193 C CN1202193 C CN 1202193C CN 02109957 CN02109957 CN 02109957 CN 02109957 A CN02109957 A CN 02109957A CN 1202193 C CN1202193 C CN 1202193C
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- production process
- urea
- formaldehyde resin
- paraffin
- glue
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- Dry Formation Of Fiberboard And The Like (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The present invention discloses a two-in-one production process for urea formaldehyde glue and emulsified wax, which belongs to the technical field of the new technology of chemical products. The p two-in-one production process has the technical key that a dehydration step is cancelled after urea formaldehyde resin is produced, and a melting mixture of paraffin wax and emulsifiers is added to a glue solution so as to directly obtain a two-in-one product of an adhesive and a waterproof agent. The two-in-one production process has the advantages of simple production process, energy saving, no waster water pollution, environment purification, cost reduction, guarantee of plate quality of the product. Thereby, the two-in-one production process is suitable for processing and manufacturing shaving boards and fibreboards in timber industry.
Description
One, technical field
The invention belongs to the invention of Chemicals novel process manufacture method.
Two, background technology
In the production of wood-processing industry shaving board and fibrous plate, need apply tackiness agent and water-resisting agent simultaneously.Used tackiness agent adopts urea-formaldehyde resin adhesive mostly, and water-resisting agent adopts melt paraffin or emulsified olefin.Tackiness agent and water-resisting agent will be produced respectively, will apply in wood shavings or fibrous material with two complete equipments when producing sheet material, and the tackiness agent that applies in the both numerous and diverse and every batch of sheet material of this production technique is difficult to grasp with the water-resisting agent ratio, has influenced the quality of sheet material.
The objective of the invention is, the production of urea-formaldehyde resin and the production of water-resisting agent are integrated, simplified production technique, guaranteed board quality, thereby reduced production cost.
Three, summary of the invention
The formation of technology of the present invention is that the production urea-formaldehyde resin without dehydration procedure, adds the fusion mixture of paraffin and emulsifying agent in glue earlier, directly obtains the two-in-one product of tackiness agent and water-resisting agent.
Advantage of the present invention is to have simplified production technique and operation; The ratio of tackiness agent and water-resisting agent is consistent; Omitted the dehydration procedure during urea-formaldehyde resin is produced, saved energy consumption, waste discharge does not help environment protection; Sneak into emulsified olefin in the urea-formaldehyde resin adhesive and be equivalent in urea-formaldehyde resin adhesive, add stablizer, prevent the increase of the continuation condensation molecular weight of urea-formaldehyde resin in depositing process, reduce the content of free formaldehyde.
Four, embodiment
Be specific embodiment of the present invention below:
(1) preparation of low content of free formaldehyde urea-formaldehyde resin:
Prescription: urea: formaldehyde (mol ratio)=1: 1.2
The consumption of various raw materials (weight part)
Urea (98%) 100{ (1. 55 2. 28 3. 17) divides three times and adds }
Formaldehyde (37%) 160～170
Sodium hydroxide (40%) is an amount of
Glacial acetic acid is an amount of
Technological process:
1. formaldehyde is added reactor, stir down and regulate pH value to 7.0～7.5 with sodium hydroxide solution.
2. add first part's urea and in 40～50 minutes, be warming up to 92 ℃ ± 2 ℃, and under this temperature, be incubated, when cloud point reaches 50 ℃, use second acid for adjusting pH value to 4.6～4.8 immediately.
3. sampling viscosimetric, when viscosity reached 1.3～1.5S (measuring with 100 * 10 air bubble viscosimeters), transferring to the pH value with sodium hydroxide solution was 7.0～7.5, cooling.
4. be cooled to 75 ℃ and add second section urea 65 ℃～68 ℃ maintenances 20 minutes.
5. add third part urea and stir that adjust pH is terminal point 6.8～7.0 after 10 minutes.
(2) preparation of paraffin emulsifier fused solution
Glue consumption is generally 8%～12% of over dry wood shavings quality in the production of shaving board, and the consumption of water-resisting agent is generally 0.5%～1.0% of over dry wood shavings.
According to aforementioned proportion, determine in urea-formaldehyde resin, to add the amount of paraffin.Select and the mutually interfused emulsifying agent of paraffin then, as sulfonated petro-leum, polyoxyethylene alkyl amine etc., determine the proportioning of paraffin and emulsifying agent, emulsifying agent is joined in the melted paraffin, as when selecting polyoxyethylene alkyl amine to make emulsifying agent, the consumption of polyoxyethylene alkyl amine is 6%～7% of a paraffin consumption; When adding emulsifying agent, add a spot of glacial acetic acid, the consumption of glacial acetic acid is 2% of a paraffin consumption.
(3) preparation of two-in-one moisture-proof adhesive
The paraffin mixed solution is warming up to 80 ℃～85 ℃, under agitation joined in 65 ℃～70 ℃ the urea-formaldehyde resin (perhaps urea-formaldehyde resin under agitation being added in the paraffin of fusing) emulsification 10～20 minutes.
Claims (1)
1. urea-formaldehyde glue and the two-in-one production technique of emulsified olefin after it is characterized in that producing urea-formaldehyde resin, cut dehydration procedure, add the fusion mixture of paraffin and emulsifying agent in glue, directly obtain the two-in-one product of tackiness agent and water-resisting agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02109957 CN1202193C (en) | 2002-02-01 | 2002-02-01 | Two-in-one urea-fomaldehyde adhisive and emulsified wax production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02109957 CN1202193C (en) | 2002-02-01 | 2002-02-01 | Two-in-one urea-fomaldehyde adhisive and emulsified wax production process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1435462A CN1435462A (en) | 2003-08-13 |
| CN1202193C true CN1202193C (en) | 2005-05-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02109957 Expired - Fee Related CN1202193C (en) | 2002-02-01 | 2002-02-01 | Two-in-one urea-fomaldehyde adhisive and emulsified wax production process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1202193C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102990742B (en) * | 2012-12-12 | 2016-01-20 | 永港伟方（北京）科技股份有限公司 | Dedicated modified liquid of Wooden modifying and preparation method thereof |
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2002
- 2002-02-01 CN CN 02109957 patent/CN1202193C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1435462A (en) | 2003-08-13 |
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