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Polymerization reaction type formaldehyde catching agent and preparation method thereof

A formaldehyde scavenger, polymerization technology, applied in aldehyde/ketone condensation polymer adhesives, adhesive types, adhesive additives, etc., can solve the problems of secondary pollution, preparation process, complexity, etc. effect of improving water resistance and bond strength, shortening curing time

Active Publication Date: 2018-11-02
灌南县天和胶业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved in the present invention is to overcome the defect that the preparation method of the polymerization reaction type formaldehyde scavenger in the prior art will produce secondary pollution or the defect of complicated preparation process, and provide a kind of polymerization reaction type formaldehyde scavenger and its preparation method

Method used

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  • Polymerization reaction type formaldehyde catching agent and preparation method thereof
  • Polymerization reaction type formaldehyde catching agent and preparation method thereof
  • Polymerization reaction type formaldehyde catching agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A polymerization reaction type formaldehyde scavenger, based on the total mass of the formaldehyde scavenger raw material as 100%, each component and mass percentage in the raw material are as follows:

[0026]

[0027] A kind of preparation method of polyreaction type formaldehyde scavenger, concrete steps are as follows:

[0028] (1) Add 300 kg of tannin, 380 kg of water, and 15 kg of sodium hydroxide into the reaction kettle, mechanically stir at 80r / min for 15 minutes, heat to 90°C, slowly add 200 kg of glyoxal, and keep warm Stir for 1h.

[0029] (2) Add 105 kg of polyacrylamide to the reaction product obtained in step (1), and mechanically stir at 80°C for 2 hours at a speed of 68r / min, stir and cool to room temperature, and discharge to obtain a polymerization reaction formaldehyde scavenger . The properties of the formaldehyde scavenger are shown in Table 1.

Embodiment 2

[0031] A polymerization reaction type formaldehyde scavenger, based on the total mass of the formaldehyde scavenger raw material as 100%, each component and mass percentage in the raw material are as follows:

[0032]

[0033] A kind of preparation method of polyreaction type formaldehyde scavenger, described method concrete steps are as follows:

[0034] (1) Add 100 kg of tannin, 700 kg of water, and 20 kg of potassium hydroxide into the reaction kettle, mechanically stir at 80r / min for 15 minutes, heat to 60°C, slowly add 50 kg of glutaraldehyde, and keep warm Stir for 3h.

[0035] (2) Add 130 kg of polyacrylamide to the reaction product obtained in step (1), and mechanically stir at 70°C for 4 hours at a speed of 68r / min, stir and cool to room temperature, and discharge to obtain a polymerization-type formaldehyde scavenger . The properties of the formaldehyde scavenger are shown in Table 1.

Embodiment 3

[0036] Embodiment 3: a kind of polyreaction type formaldehyde scavenger, take the gross mass of described formaldehyde scavenger raw material as 100%, each component and mass percentage in the raw material are as follows:

[0037]

[0038]

[0039] A kind of preparation method of polyreaction type formaldehyde scavenger, described method concrete steps are as follows:

[0040] (1) Add 50 kg of tannin, 699 kg of water, and 1 kg of sodium hydroxide into the reaction kettle, mechanically stir at 80r / min for 15 minutes, heat to 80°C, slowly add 50 kg of glutaraldehyde, and keep warm Stir for 2h.

[0041] (2) Add 200 kg of polyacrylamide to the reaction product obtained in step (1), and mechanically stir at 85°C for 1 hour at a speed of 68r / min, stir and cool to room temperature, and discharge to obtain a polymerization reaction formaldehyde scavenger . The properties of the formaldehyde scavenger are shown in Table 1.

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Abstract

The invention discloses a polymerization reaction type formaldehyde catching agent, which is prepared from 5 to 30 parts of tannin, 20 to 70 parts of water, 0.1 to 5 parts of basic catalysts, 5 to 50parts of aldehyde substances and 3 to 20 parts of polyamino compounds. The invention also discloses a preparation method of the polymerization reaction type formaldehyde catching agent. Through addition polycondensation, water-soluble polymers using tannin water-resistant structures are main bodies and comprising a great number of amino groups and hydroxymethyls are formed; amino groups and activereaction hollow sites in the polymers can achieve the goal of capturing formaldehyde through reaction with formaldehyde; in addition, through polymerization reaction, water-resistant tannin structureunits are embedded into urea formaldehyde and modified urea formaldehyde resin; the water resistance and the bonding intensity of the urea formaldehyde and the modified urea formaldehyde resin can beimproved; the resin curing time is shortened; no adverse influence is caused on the active period of the resin. The polymerization reaction type formaldehyde catching agent can be added into the ureaformaldehyde and the modified urea formaldehyde bonding agents to reduce the free formaldehyde in the resin adhesive; the polymerization reaction type formaldehyde catching agent can be sprayed and smeared onto the surface of artificial board products to directly reduce the formaldehyde release quantity of the artificial boards.

Description

technical field [0001] The invention relates to a polymerization reaction type formaldehyde scavenger and a preparation method thereof. Background technique [0002] Formaldehyde-based adhesives are sometimes used in the manufacture of wooden materials such as plywood, particleboard, MDF (medium density fiberboard), or furniture and building materials using the above-mentioned wooden materials. The formaldehyde released by these materials will pollute the living environment. , especially to children and the elderly. [0003] The release of formaldehyde from wood-based panels can be reduced by spraying the formaldehyde scavenger into urea-formaldehyde and modified urea-formaldehyde resin or on the surface of the wood-based panels prepared. The commonly used formaldehyde scavengers are mainly ammonia or amino derivatives, urea, phenolhydrazines, organic amines, thiourea mixture, ammonium bisulfite, etc. These substances have good aldehyde removal effect, but they are highly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G8/04C09J161/24C09J161/32C09J11/08C09D161/12C09D133/26
CPCC08G8/04C08L2205/03C09D161/12C09J11/08C09J161/24C09J161/32C08L61/12C08L33/26
Inventor 徐玉顺
Owner 灌南县天和胶业有限公司
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