CN105524580A - Production method of urea-formaldehyde resin-polyurethane adhesive - Google Patents
Production method of urea-formaldehyde resin-polyurethane adhesive Download PDFInfo
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- CN105524580A CN105524580A CN201410576477.4A CN201410576477A CN105524580A CN 105524580 A CN105524580 A CN 105524580A CN 201410576477 A CN201410576477 A CN 201410576477A CN 105524580 A CN105524580 A CN 105524580A
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Abstract
The invention discloses a production method of a urea-formaldehyde resin-polyurethane adhesive and belongs to the field of chemical engineering. 50-52% of liquid urea-formaldehyde resin, 22-24% of polyvinyl alcohol, 3% of polyurethane, 15% of ethyl acetate, 2% of acetyl citrate, 5% of flour and 1% of aluminum hydroxide are mixed at a specific temperature to form the urea-formaldehyde resin-polyurethane adhesive. The compounded adhesive has the advantages of large bonding force, high bonding strength, small shrinkage, good size stability, high temperature resistance, low temperature resistance and fast drying rate.
Description
Technical field:
The invention belongs to chemical field, particularly relate to a kind of production method of urea-formaldehyde resin-polyurethane adhesive.
Background technology:
Urea-formaldehyde resin is the polymkeric substance that urea and formaldehyde reaction obtain, it is one of thermosetting resin developing comparatively morning, urea and formalin polycondensation can obtain linear urea aldehyde oligopolymer under the catalysis of acid or alkali, industrial with alkali as a catalyst, the reaction the first step generates one and dimethylolurea, then methylol and the further condensation of amino, obtain soluble resin.Urea-formaldehyde resin more easily solidifies, color of resin after solidification is translucent, and shape, hardness are high, oil resistant, weak acid resistant, weak base, anti-mildew, there are good insulativity and temperature tolerance, but weathering resistance and water tolerance poor, life-time service nondiscoloration, also nondiscoloration during thermoforming, urea-formaldehyde resin is the main binder of domestic and international timber industry, the bonding of sheet material, thick china, decorative panel for building can be made, be used widely due to series of advantages such as its bonding strength are high, quick solidifying, good operability, abundant raw material are easy to get; In order to improve the adhesive property of urea-formaldehyde resin adhesive further, the present invention uses urethane and its composite, urethane possesses excellent shear strength and impact property, and possess excellent flexible nature, the bonding of different heat expansion coefficient base material can be adapted to, not only bonding force is strong, and also have excellent buffering, shock-absorbing function, its advantage is simultaneously: water-fast, resistance to medium good; Bonding strength is high, and initial bonding strength is large; Freeze-thawing resistant, higher temperature resistant; Rate of drying is very fast, and under low ambient temperature, film-forming properties is good; Construction technology is good.Therefore urethane is used and urea-formaldehyde resin is composite is conducive to the performance greatly improving urea-formaldehyde resin adhesive, the advantage of gum blend stick is: cohesive force increases greatly, and Joint strength is very high, and shrinking percentage is little, good stability of the dimension, high temperature resistant, low temperature resistant, and rate of drying is fast.
Summary of the invention:
The problem that the present invention mainly solves is to provide a kind of production method of urea-formaldehyde resin-polyurethane adhesive, and the raw material producing the use of this tackiness agent has by weight ratio: liquid urea-formaldehyde resin 50-52%, poly-enol 22-24%, urethane 3%, vinyl acetic monomer 15%, acetyl citrate 2%, flour 5%, aluminium hydroxide 1%.
The technical solution used in the present invention is:
(1) urethane of formula ratio, vinyl acetic monomer are sent into stirred pot, be uniformly mixed under normal temperature;
(2) the liquid urea-formaldehyde resin of formula ratio and poly-enol are sent into chemical reaction kettle, temperature is progressively risen to 45-50 DEG C, starts agitator, the rotating speed of agitator is 25-30 rev/min, stirs and carries out the first reaction 0.4-0.6 hour; Chemical reaction temperature in the kettle is brought up to 60-65 DEG C, the mixture of urethane, vinyl acetic monomer is added while stirring in chemical reaction kettle, stirring is cooled to normal temperature after carrying out the second reaction 0.4-0.6 hour, add the acetyl citrate of formula ratio, flour and aluminium hydroxide and carry out the 3rd reaction, stir and get product.
Further technical scheme of the present invention is:
The first temperature of reaction described in step (2) is 42.5 DEG C, and the reaction times is 0.5 hour.
The second temperature of reaction described in step (2) is 62.5 DEG C, and the reaction times is 0.5 hour.
The normal temperature of the 3rd reaction described in step (2) is 0-35 DEG C.
The invention has the beneficial effects as follows: the production method providing a kind of urea-formaldehyde resin-polyurethane adhesive, the method production technique is simple, abundant raw material source, product uses urea-formaldehyde resin and the composite rear performance of urethane to improve, the advantage of gum blend stick is: cohesive force increases greatly, and Joint strength is very high, and shrinking percentage is little, good stability of the dimension, high temperature resistant, low temperature resistant, and rate of drying is fast.
Embodiment:
Embodiment 1:
By account for total amount be 3% urethane, account for total amount be 15% vinyl acetic monomer send into stirred pot, be uniformly mixed under normal temperature; By account for total amount be 50% liquid urea-formaldehyde resin and account for total amount be 24% poly-enol send into chemical reaction kettle, temperature is progressively risen to 45 DEG C, starts agitator, the rotating speed of agitator is 25-30 rev/min, stirs and carries out the first reaction 0.6 hour; Chemical reaction temperature in the kettle is brought up to 60 DEG C, the mixture of urethane, vinyl acetic monomer is added while stirring in chemical reaction kettle, stirring is carried out the second reaction and is cooled to normal temperature after 0.6 hour, add account for total amount be 2% acetyl citrate, account for total amount be 5% flour and account for total amount be 1% aluminium hydroxide carry out the 3rd reaction, stir and get product.
Embodiment 2:
By account for total amount be 3% urethane, account for total amount be 15% vinyl acetic monomer send into stirred pot, be uniformly mixed under normal temperature; By account for total amount be 51% liquid urea-formaldehyde resin and account for total amount be 23% poly-enol send into chemical reaction kettle, temperature is progressively risen to 47.5 DEG C, starts agitator, the rotating speed of agitator is 25-30 rev/min, stirs and carries out the first reaction 0.5 hour; Chemical reaction temperature in the kettle is brought up to 62.5 DEG C, the mixture of urethane, vinyl acetic monomer is added while stirring in chemical reaction kettle, stirring is carried out the second reaction and is cooled to normal temperature after 0.5 hour, add account for total amount be 2% acetyl citrate, account for total amount be 5% flour and account for total amount be 1% aluminium hydroxide carry out the 3rd reaction, stir and get product.
Embodiment 3:
By account for total amount be 3% urethane, account for total amount be 15% vinyl acetic monomer send into stirred pot, be uniformly mixed under normal temperature; By account for total amount be 52% liquid urea-formaldehyde resin and account for total amount be 22% poly-enol send into chemical reaction kettle, temperature is progressively risen to 50 DEG C, starts agitator, the rotating speed of agitator is 25-30 rev/min, stirs and carries out the first reaction 0.4 hour; Chemical reaction temperature in the kettle is brought up to 65 DEG C, the mixture of urethane, vinyl acetic monomer is added while stirring in chemical reaction kettle, stirring is carried out the second reaction and is cooled to normal temperature after 0.4 hour, add account for total amount be 2% acetyl citrate, account for total amount be 5% flour and account for total amount be 1% aluminium hydroxide carry out the 3rd reaction, stir and get product.
Claims (2)
1. a production method for urea-formaldehyde resin-polyurethane adhesive, the raw materials by weight of use calculates and comprises: liquid urea-formaldehyde resin 50-52%, poly-enol 22-24%, urethane 3%, vinyl acetic monomer 15%, acetyl citrate 2%, flour 5%, aluminium hydroxide 1%; It is characterized in that:
(1) urethane of formula ratio, vinyl acetic monomer are sent into stirred pot, be uniformly mixed under normal temperature;
(2) the liquid urea-formaldehyde resin of formula ratio and poly-enol are sent into chemical reaction kettle, temperature is progressively risen to 45-50 DEG C, starts agitator, the rotating speed of agitator is 25-30 rev/min, stirs and carries out the first reaction 0.4-0.6 hour; Chemical reaction temperature in the kettle is brought up to 60-65 DEG C, the mixture of urethane, vinyl acetic monomer is added while stirring in chemical reaction kettle, stirring is cooled to normal temperature after carrying out the second reaction 0.4-0.6 hour, add the acetyl citrate of formula ratio, flour and aluminium hydroxide and carry out the 3rd reaction, stir and get product.
2. the production method of a kind of urea-formaldehyde resin-polyurethane adhesive according to claim 1, it is characterized in that: the first temperature of reaction described in step (2) is 42.5 DEG C, the reaction times is 0.5 hour; The second described temperature of reaction is 62.5 DEG C, and the reaction times is 0.5 hour; The normal temperature of the 3rd described reaction is 0-35 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410576477.4A CN105524580A (en) | 2014-10-27 | 2014-10-27 | Production method of urea-formaldehyde resin-polyurethane adhesive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410576477.4A CN105524580A (en) | 2014-10-27 | 2014-10-27 | Production method of urea-formaldehyde resin-polyurethane adhesive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105524580A true CN105524580A (en) | 2016-04-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410576477.4A Pending CN105524580A (en) | 2014-10-27 | 2014-10-27 | Production method of urea-formaldehyde resin-polyurethane adhesive |
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| CN (1) | CN105524580A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110128981A (en) * | 2019-05-28 | 2019-08-16 | 河南森远科技有限公司 | A kind of modified flame-retardant urea-formaldehyde resin adhesive and preparation method thereof producing wood-based plate |
-
2014
- 2014-10-27 CN CN201410576477.4A patent/CN105524580A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110128981A (en) * | 2019-05-28 | 2019-08-16 | 河南森远科技有限公司 | A kind of modified flame-retardant urea-formaldehyde resin adhesive and preparation method thereof producing wood-based plate |
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Application publication date: 20160427 |