CN105647452A

CN105647452A - Preparation process of environmentally friendly urea-formaldehyde glue

Info

Publication number: CN105647452A
Application number: CN201510938555.5A
Authority: CN
Inventors: 赵海波
Original assignee: Guangdong Fumei New Material Technology Co Ltd
Current assignee: Guangdong Fumei New Material Technology Co Ltd
Priority date: 2015-12-16
Filing date: 2015-12-16
Publication date: 2016-06-08

Abstract

A preparation process of an environmentally friendly urea-formaldehyde glue comprises the following steps: 1, adding 20-60 parts by weight of formaldehyde into a reaction vessel, then adding triethanol to adjust the pH value of 7.5-8; 2, adding 6-12 parts of urea and 1-4 parts of melamine, heating to 80-82 DEG C, and standing at 80-82 DEG C for 20 min; 3, adding 0.01-0.06 part of dilute formic acid to adjust the pH to 5.6-5.8, automatically rising the temperature to 88 -90 DEG C and insulting for 50 min; 4, cooling to 25 DEG C to gain white color in the water, adding 0.01-0.04 part of an accelerator to adjust the pH value to 7.5-8.2; 5, adding 2-6 parts of urea and insulting for 10 minutes; 6, adding 2-8 parts of water and cooling to 60 DEG C; and 7, adding 2-6 parts of urea, cooling to 35 DEG C, and discharging the material. The urea-formaldehyde glue prepared by the invention can achieve E0-grade environmental standards, has good environmental performance, and significantly reduces pollution to the environment.

Description

A kind of environment-friendly type urine aldehyde glue preparation technology

Technical field

The present invention relates to furniture paper dipping technique field, particularly a kind of environment-friendly type urine aldehyde glue preparation technology.

Background technology

Urine aldehyde glue, as a kind of traditional tackiness agent, because its technique is simple, with low cost, easy to use, has good heat-resisting, corrosion resistance nature and higher bond strength, and obtains a large amount of uses in wood-based plate and wood working and furniture industry.

There is the poor shortcoming of water tolerance, ageing resistance and toughness in the product that traditional technology is produced, the today particularly day by day improved in Environmental awareness and requirement, free formaldehyde is being produced and overflowed in a large number in use procedure to traditional technology product, contaminate environment, will seriously restrict and limit the use of this product.

Therefore, existing technique needs to be improved and improves.

Summary of the invention

It is an object of the invention to provide a kind of environment-friendly type urine aldehyde glue preparation technology with E0 level environmental protection standard.

The present invention realizes above-mentioned purpose by following technique means:

A kind of environment-friendly type urine aldehyde glue preparation technology, comprises the following steps:

Step one, get 20-60 part formaldehyde and drop in reactor, then add three ethanol and regulate PH values to be 7.5-8;

Step 2, add 6-12 part urea, 1-4 part trimeric cyanamide is heated to 80-82 DEG C and is incubated 20 minutes;

Step 3, add 0.01-0.06 part dilution formic acid regulate PH value most 5.6-5.8, temperature automatically rises to 88-90 DEG C and is incubated 50 minutes;

Step 4, wait to be down in 25 DEG C of water and turn white, add 0.01-0.04 part promotor and regulate PH value to be 7.5-8.2;

Step 5, add 2-6 part urea and it is incubated 10 minutes;

Step 6, add 2-8 part water for cooling to 60 DEG C;

Step 7, add 2-6 part urea and it is cooled to 35 DEG C, discharging.

Further, also comprising step 8, add 3-7 part solidifying agent, one set time is 7-7.5 minute; Adding 3-7 part triamine adhesive curing agent, two road set times were 5-5.5 minute.

Described promotor is zinc sulfate, trimethyl phosphite 99, oxalic acid diethyl ester one wherein.

Described solidifying agent is ammonium chloride.

Compared with prior art, the invention has the beneficial effects as follows: adopt above-mentioned preparation technology to prepare the urine aldehyde glue and can reach E0 level environmental protection definitely, there is good environmental-protecting performance, the greatly less pollution to environment.

Embodiment

The present invention is described in further detail to provide embodiment below:

Embodiment 1: a kind of environment-friendly type urine aldehyde glue preparation technology, comprises the following steps:

Step one, part formaldehyde drops in reactor to get 20, then adds three ethanol and regulate PH values to be 7.5;

Step 2, part urea that adds 6,1 part of trimeric cyanamide are heated to 80 DEG C and are incubated 20 minutes;

Step 3, the dilution formic acid that adds 0.01 part regulate PH value most 5.6, and temperature automatically rises to 88 DEG C and is incubated 50 minutes;

Step 4, wait to be down in 25 DEG C of water and turn white, add 0.01 part of zinc sulfate and regulate PH value to be 7.5;

Step 5, part urea is incubated 10 minutes to add 2;

Step 6, part water for cooling to 60 DEG C that adds 2;

Step 7, part urea is cooled to 35 DEG C to add 2, discharging.

Step 8, part ammonium chloride that adds 3, one set time is about 7 minutes;

Two roads are triamine glue, add 3-5 part solidifying agent, and two road set times were 5 minutes.

Embodiment 2:

Step one, part formaldehyde drops in reactor to get 35, then adds three ethanol and regulate PH values to be 7.7;

Step 2, part urea that adds 8,2.5 parts of trimeric cyanamides are heated to 80 DEG C and are incubated 20 minutes;

Step 3, the dilution formic acid that adds 0.03 part regulate PH value most 5.7, and temperature automatically rises to 89 DEG C and is incubated 50 minutes;

Step 4, wait to be down in 25 DEG C of water and turn white, add 0.02 part of trimethyl phosphite 99 and regulate PH value to be 7.7;

Step 5, part urea is incubated 10 minutes to add 4;

Step 6, part water for cooling to 60 DEG C that adds 5;

Step 7, part urea is cooled to 35 DEG C to add 4, discharging.

Embodiment 3:

Step one, part formaldehyde drops in reactor to get 48, then adds three ethanol and regulate PH values to be 7.8;

Step 2, part urea that adds 9,3 parts of trimeric cyanamides are heated to 81 DEG C and are incubated 20 minutes;

Step 4, wait to be down in 25 DEG C of water and turn white, add 0.03 part of oxalic acid diethyl ester and regulate PH value to be 7.9;

Step 5, part urea is incubated 10 minutes to add 5;

Step 6, part water for cooling to 60 DEG C that adds 7;

Step 7, part urea is cooled to 35 DEG C to add 5, discharging.

Embodiment 4:

Step one, part formaldehyde drops in reactor to get 60, then adds three ethanol and regulate PH values to be 8;

Step 2, part urea that adds 12,4 parts of trimeric cyanamides are heated to 82 DEG C and are incubated 20 minutes;

Step 3, the dilution formic acid that adds 0.06 part regulate PH value most 5.8, and temperature automatically rises to 90 DEG C and is incubated 50 minutes;

Step 4, wait to be down in 25 DEG C of water and turn white, add 0.04 part of trimethyl phosphite 99 and regulate PH value to be 8.2;

Step 5, part urea is incubated 10 minutes to add 6;

Step 6, part water for cooling to 60 DEG C that adds 8;

Step 7, part urea is cooled to 35 DEG C to add 6, discharging.

Step 8, adding 3-7 part ammonium chloride, one set time is 7.5 minutes; Two roads add triamine glue, and two road set times were 5.5 minutes.

Above to invention has been detailed description; its object is to allow the personage being familiar with this art can understand the content of the present invention and implemented; can not limit the scope of the invention with this; the equivalence that all spirit according to the present invention are done changes or modifies, and all should be encompassed in protection scope of the present invention.

Claims

1. an environment-friendly type urine aldehyde glue preparation technology, it is characterised in that, comprise the following steps:

Step 5, add 2-6 part urea and it is incubated 10 minutes;

Step 6, add 2-8 part water for cooling to 60 DEG C;

Step 7, add 2-6 part urea and it is cooled to 35 DEG C, discharging.

2. environment-friendly type urine aldehyde glue preparation technology as claimed in claim 1, it is characterised in that, also comprise step 8, add 3-7 part solidifying agent, one set time is 7-7.5 minute; Adding 3-7 part triamine adhesive curing agent, two road set times were 5-5.5 minute.

3. environment-friendly type urine aldehyde glue preparation technology as claimed in claim 1, it is characterised in that, described promotor is zinc sulfate, trimethyl phosphite 99, oxalic acid diethyl ester one wherein.

4. environment-friendly type urine aldehyde glue preparation technology as claimed in claim 1, it is characterised in that, described solidifying agent is ammonium chloride.