Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of environment-friendly urea-formaldehyde resin glue and its preparation method and application

A urea-formaldehyde resin adhesive, an environmentally friendly technology, applied in the direction of adhesives, adhesive types, aldehyde/ketone condensation polymer adhesives, etc., can solve the problems of high formaldehyde content and free formaldehyde content, and achieve small formaldehyde release and easy operation Controlled, environmentally friendly effect

Active Publication Date: 2020-11-10
厦门创业人环保科技股份有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the high formaldehyde content in the existing urea-formaldehyde resin or need to add a large amount of formaldehyde scavenger to reduce the defect of free formaldehyde content, and to provide a kind of only need to add a small amount of formaldehyde scavenger just can reduce free formaldehyde The preparation method of the environment-friendly urea-formaldehyde resin glue of content and the environment-friendly urea-formaldehyde resin glue prepared by the method and its application

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) get the raw materials ready by the component of following parts by weight:

[0028]1200 parts of formaldehyde solution, 300 parts of urea I, 180 parts of urea II, 230 parts by weight of urea III, 180 parts by weight of urea IV, 120 parts by weight of urea V, 50 parts of resorcinol, 1.7 parts of polyvinyl alcohol, polyacrylamide (the number average molecular weight is 20 Wan, the same below) 0.6 parts, 30 parts of ammonia water, 30 parts of ammonium chloride, 1.5 parts of lye. Wherein, formaldehyde solution is the formaldehyde aqueous solution that mass concentration is 37wt%, and the number-average molecular weight of polyvinyl alcohol is 131,000, and lye is that mass concentration is 20wt% sodium hydroxide aqueous solution, and ammoniacal liquor is the ammoniacal solution that mass concentration is 30wt%, chlorine Ammonium chloride is an aqueous solution of ammonium chloride with a mass concentration of 10 wt%.

[0029] (2) The preparation process is as follows: ...

Embodiment 2

[0036] (1) Prepare materials according to the components of the following parts by mass:

[0037] 1500 parts of formaldehyde solution, 300 parts of urea I, 180 parts of urea II, 230 parts of urea III, 150 parts of urea IV, 120 parts of urea V, 70 parts of resorcinol, 2 parts of polyvinyl alcohol, 1 part of polyacrylamide, 40 parts of ammonia water , 40 parts of ammonium chloride, 1.5 parts of lye. Wherein, formaldehyde is the formaldehyde aqueous solution that mass concentration is 38wt%, and the number-average molecular weight of polyvinyl alcohol is 131,000, and lye is that mass concentration is 20wt% sodium hydroxide aqueous solution, and ammoniacal liquor is the ammoniacal solution that mass concentration is 32wt%, chlorination Ammonium is an aqueous solution of ammonium chloride with a mass concentration of 15 wt%.

[0038] (2) The preparation process is as follows:

[0039] S1. Add formaldehyde into the reaction kettle equipped with stirrer, thermometer and reflux cond...

Embodiment 3

[0045] (1) Prepare materials according to the components of the following parts by mass:

[0046] Formaldehyde solution 1800 parts, urea Ⅰ 300 parts, urea Ⅱ 180 parts, urea Ⅲ 230 parts by weight, urea Ⅳ 150 parts by weight, urea Ⅴ 140 parts by weight, resorcinol 80 parts, polyvinyl alcohol 2.5 parts, polyacrylamide 1.2 parts, ammonia water 40 parts , 30 parts of ammonium chloride, 1.5 parts of lye. Wherein, formaldehyde solution is the formaldehyde aqueous solution that mass concentration is 40wt%, and the number-average molecular weight of polyvinyl alcohol is 131,000, and lye is that mass concentration is 20wt% sodium hydroxide aqueous solution, and ammoniacal liquor is the ammoniacal solution that mass concentration is 32wt%, chlorine Ammonium chloride is an aqueous solution of ammonium chloride with a mass concentration of 10 wt%.

[0047] (2) The preparation process is as follows:

[0048] S1. Add formaldehyde into the reaction kettle equipped with stirrer, thermometer ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the field of adhesives and discloses an environment-friendly urea-formaldehyde resin adhesive and a preparation method and application thereof. The preparation method of the environment-friendly urea-formaldehyde resin adhesive comprises the following steps of: heating formaldehyde to 35-45 DEG C, adding polyvinyl alcohol, amide and urea I, uniformly mixing, adjusting thepH value of the system to 7-7.5 by alkali liquor, continuously heating, adding urea II and ammonium chloride to adjust the pH value to 7-7.5 when the temperature rises to 70-80 DEG C, continuously heating to 90-100 DEG C, and reacting for 20-40 min; during the process, adding ammonium chloride irregularly to control the pH value to 4-5, adding ammonia water and urea III after the temperature is reduced to 70-85 DEG C, adjusting the pH value to 7.5-8 by using alkali liquor, adding resorcinol and reacting for 20-50 min at 80-85 DEG C, adjusting the pH value to 8.5-9.5 with the alkali liquor, reacting for 5-15 min, adding urea IV, reacting at 70-80 DEG C for 15-25 min, adding urea V, adjusting the pH value to 7-8 with the alkali liquor, reacting for 20-40 min, and naturally cooling. The environment-friendly urea-formaldehyde resin adhesive provided by the invention has small formaldehyde emission and high bonding strength, and can reach E0 standard.

Description

technical field [0001] The invention belongs to the field of adhesives, and in particular relates to an environment-friendly urea-formaldehyde resin adhesive and a preparation method and application thereof. Background technique [0002] The news that the E2 standard will be removed from the mandatory national standard GB18580-2001 "Indoor Decoration Materials, Wood-based Panels and Their Products" by the National Standards Committee has aroused the market's attention. Stricter formaldehyde emission standards. With the introduction of these good news, the wood-based panel industry is expected to usher in new development opportunities, and the development direction of the industry's "zero formaldehyde" emissions is expected to drive the market size of my country's wood-based panel industry to break through one trillion yuan. [0003] Wood-based panels refer to panels or molded products made of wood or other non-wood plants as raw materials, separated into various unit materi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C09J161/32C08G12/40
CPCC08G12/40C09J161/32
Inventor 罗学涛夏磊乐险黄柳青
Owner 厦门创业人环保科技股份有限公司