A kind of boiling water resistant modified urea-formaldehyde resin adhesive and preparation method thereof

A urea-formaldehyde resin and adhesive technology, applied in the direction of adhesives, aldehyde/ketone condensation polymer adhesives, adhesive types, etc., can solve the problems of poor water resistance, easy opening of wood-based panels, and reduced bonding strength, etc., to reduce formaldehyde The effect of releasing volume, solving depletion problems, and improving flexibility
CN104194696BActive Publication Date: 2016-01-06BEIJING FORESTRY UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING FORESTRY UNIVERSITY
Publication Date
2016-01-06

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Abstract

The invention discloses a boiling water-resistant modified urea-formaldehyde resin adhesive and a preparation method thereof, which is prepared from formaldehyde, urea, polyvinyl alcohol, melamine and a reinforcing agent, wherein the molar ratio of formaldehyde to urea is 1.15-1.0 : 1, the addition of the melamine accounts for 6-14% of the total weight; the addition of the enhancer accounts for 8-20% of the total weight; the preparation method includes adding the reaction enhancer and then adding the first batch of urea, the molar ratio is 2.0-2.2:1, add the second batch of urea, the molar ratio is 1.4-1.2:1, and finally add the third batch of urea, the molar ratio is 1.15-1.0:1; the advantage of the present invention is: using formaldehyde and urea as raw materials , by adding a reinforcing agent, the flexibility of the resin molecules is increased, an interpenetrating network structure is formed, and the internal stress of the resin curing is reduced, so that the preparation of the modified urea-formaldehyde resin not only has low formaldehyde content, high bonding strength, but also low cost.
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Description

technical field

[0001] The invention relates to an adhesive, in particular to a boiling water-resistant modified urea-formaldehyde resin adhesive and a preparation method thereof, belonging to the field of adhesives. Background technique

[0002] With the improvement of people's living standards and the continuous and stable development of construction, decoration, packaging and other industries, the output of wood-based panels in my country has grown rapidly. The total output of wood-based panels, plywood, furniture, and wood flooring has ranked first in the world for many years in a row. In 2013, the total output of wood-based panels in my country was 272 million m 3 , accounting for about 50% of the world's total production. Average production of 9m per ton of adhesive 3 According to the calculation of wood-based panels, the consumption of wood adhesives in my country in 2013 was about 30 million tons (solid content 50%), among which urea-formaldehyde resin and its mod...

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
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