CN101045851A

CN101045851A - Environment protection modification urea-formaldehyde adhesive

Info

Publication number: CN101045851A
Application number: CN 200610016716
Authority: CN
Inventors: 樊庆真
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-03-28
Filing date: 2006-03-28
Publication date: 2007-10-03

Abstract

This invention relates to environment-protecting modified urine aldehyde glue, apply to fine wood work board and multi-plywood. The main raw material includes yellow- black thickness oil paint kind quality that abstracted from black liquor of paper mill, urea, formaldehyde, edible baking power, edible essence, and edible crocus pigment. Its intensity is as good as intensity of phenol formaldehyde, can substitu virulent phenol formaldehyde. It can advance resistance to temperature of board, and possess merits such as hand iness, no bubble, low scrap rate and so on.

Description

A kind of environment protection modification urea-formaldehyde adhesive

Technical field

The present invention relates to a kind of tackiness agent, a kind of specifically core-board that is applied to, the environment protection modification urea-formaldehyde adhesive that multiplying plywood processing is used.

Background technology

Along with improving constantly of progress of science and technology and people's living standard, be mainly used in the drawer plate of outlet on the furniture, bed board, decorations, building, the sheet material processing manufacturing of products such as multiplying plywood, core-board, container bottom board and building template in fields such as board raw material, musical instrument, packing very big development has also been arranged.Present most multiplying plywood, core-board manufacturer all adopt the main bonding raw material of urine aldehyde glue as process for processing, because urine aldehyde glue main raw material is formaldehyde and urea, plate bonding, the compacting production process in, the situation is tense for Air quality in the job shop, formaldehyde exceeds standard, and has caused great injury for operator's health.

Employed urine aldehyde glue has following shortcoming in existing multiplying plywood and the core-board production process:

1, smell is big, formaldehyde content is high, and production environment is seriously polluted, not environmental protection, because formaldehyde exceeds standard and can cause the people with leukemia, multiple cancer, and causing death rapidly when serious.

2, in water, invade bubble and be easy to come unglued, bubble the scrap rate height.

Summary of the invention

The objective of the invention is to provide a kind of and in existing urine aldehyde glue, add the thickness black liquor, steep compositions such as big powder, food flavour, decompose a part of formaldehyde content in the urine aldehyde glue, have aromatic odour, increase bond strength in the urine aldehyde glue simultaneously, can improve the heat resisting temperature of plate, have the modification urea-formaldehyde adhesive of certain environmental-protection function.

The object of the present invention is achieved like this, and the present invention adopts following materials of weight proportions to make:

30 parts of thickness black liquor

35 parts in urea

66 parts in formaldehyde

0.6 part of polyvinyl alcohol

0.3 part in the big powder of edible bubble

0.01 part of food flavour

0.03 part of edible orange pigment

Described thickness black liquor is that to adopt the paper mill alkaline process be that rare black liquor of raw pulp forms through refining with the vegetable fibre.

Concrete manufacturing process is as follows:

1), the black liquor of at first paper mill being discharged puts into reactor, Heating temperature is 50～100 ℃, the time is 4～6 hours, the material when dehydration acquires a certain degree in the reactor is yellow black heavy-gravity paint shape, and is stand-by.

2), the formaldehyde that in reactor, adds all wts by the weight of proportioning, polyvinyl alcohol, the urea of 1/3 weight, be heated to the big powder of bubble of throwing in capacity after 50 ℃, when Heating temperature is 60 ℃, the urea that adds 1/3 weight again, when temperature reaches 80 ℃, the urea of 1/3 weight of remainder is all dropped into, in the reflection process, temperature is finally regulated pH value to 7.5 by adding formic acid between 50 ℃～100 ℃ the time, 1～2 hour reaction times, add the food flavour and the edible orange pigment of proportional quantity when reactor is cooled to 40 ℃, carries out the packing of product when reactor is cooled to 20 ℃, the kg/ bag promptly gets this product.

Product of the present invention has the following advantages:

But 1, the adding decomposing urea of product black liquor of the present invention and the objectionable impurities in the formaldehyde, the while can increase the intensity of glue, and smell is little in use, can not pollute production environment, and environment protecting is good.

2, use this product can increase the intensity of glue during making sheet, its water-proof intensity was come unglued by original 60 ℃ of water in 1 hour, reached present 70 ℃ of water and did not come unglued in 6 hours, soaks two weeks and do not come unglued in normal-temperature water, and scrap rate is low.

3, owing in the production process of product, in raw material, added food flavour, make this product give out a kind of taste of fragrance in use, simultaneously owing to added edible orange pigment, in the process that glue is smeared, just can be easy to observe its degree of uniformity with eyes, more convenient to operate.

4, add the big powder of edible bubble in this product processes and can prevent the danger that in reaction process, causes because of expansion of liquids.

Embodiment

The rare black liquor 3000kg that at first gets lonely home town, Lishu County, the Jilin Province Liaohe River economic and technological development zone second paper mill alkaline process and with the vegetable fibre be raw pulp puts into reactor and carries out concentration, Heating temperature is 50～100 ℃, time is 4～6 hours, dehydration when acquiring a certain degree the material in the reactor be yellow black heavy-gravity paint shape, it is stand-by to obtain 300kg thickness black liquor (sugar degree is 12%, albumen be 0.5%).

(grand victory chemical plant, Changchun produces, density: 1.10, formaldehyde: acidity 36.61%: in formic acid≤0.023%, colourity " platinum cobalt number " 25, iron level≤0.00043%, methanol content: 0.7) with 350kg formaldehyde; Polyvinyl alcohol 6kg; (this urea is that Qian'an, Hebei chemical fertilizer limited-liability company gives birth to tight to 220kg urea, GB2440---2001, granularity d0.85mm---2.80mm, nitrogenous 〉=46.3%) add in the reactor, be heated to the big powder of bubble of throwing in 3kg after 50 ℃, add formic acid simultaneously and regulate pH value to 7.5; When Heating temperature reaches 60 ℃, add 220kg urea again, add formic acid simultaneously and regulate pH value to 7.5; When temperature reaches 80 ℃, the 220kg urea of remainder is all dropped in the reactor, add formic acid simultaneously and regulate pH value to 7.5; 1～2 hour total overall reaction time, when cooling off (chilling) to 40～45 ℃, reactor adds the edible orange pigment of 0.1kg food flavour and 0.3kg, stir, obtaining the environment protection modification urea-formaldehyde adhesive of 1200kg, carry out the packing of product when reactor is cooled to 20 ℃---the 220kg/ bucket gets this product.

Claims

1, a kind of environment protection modification urea-formaldehyde adhesive is characterized in that: this urine aldehyde glue is to adopt following materials of weight proportions to make:

30 parts of thickness black liquor

35 parts in urea

66 parts in formaldehyde

0.6 part of polyvinyl alcohol

0.3 part in the big powder of edible bubble

0.01 part of food flavour

0.03 part of edible orange pigment

Concrete manufacturing process is as follows:

A), the black liquor of at first paper mill being discharged puts into reactor, Heating temperature is 50～100 ℃, the time is 4～6 hours, the material when dehydration acquires a certain degree in the reactor is yellow black heavy-gravity paint shape, and is stand-by;

B), the formaldehyde that in reactor, adds all wts by the weight of proportioning, polyvinyl alcohol, the urea of 1/3 weight, be heated to the big powder of bubble of throwing in capacity after 50 ℃, when Heating temperature is 60 ℃, the urea that adds 1/3 weight again, when temperature reaches 80 ℃, the urea of 1/3 weight of remainder is all dropped into, in the reflection process, temperature adds formic acid by three times between 50 ℃～100 ℃ the time and regulates pH values to 7.5,1～2 hour reaction times, when reactor is cooled to 40 ℃, adding the food flavour and the edible orange pigment of proportional quantity, carry out the packing of product when reactor is cooled to 20 ℃---the 220kg/ bucket gets this product.

2, a kind of environment protection modification urea-formaldehyde adhesive according to claim 1 is characterized in that: described thickness black liquor is that to adopt the paper mill alkaline process be that rare black liquor of raw pulp forms through refining with the vegetable fibre.