Lignin weather-resistant fiberboard adhesive and production method thereof

A production method and lignin technology, applied in the direction of adhesives, adhesive additives, adhesive types, etc., can solve the quality problems of wood-based panels or fiberboards, adhesive aging, formaldehyde release, etc., and achieve mature industrial conditions and surface The effect of low tension and high bond strength

Active Publication Date: 2017-08-29
苏燕
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The authorized publication number is: CN100381534C patent: a lignin-friendly adhesive and its preparation method. The lignin adhesive is obtained by washing lignin with water and preparing a lignin solution. Although the main raw material is lignin, it is still Using formaldehyde as one of the raw materials, the adhesive produced still releases a small amount of formaldehyde; the invention with the application publication number CN101928536A: a flame-retardant modified lignin glue and its preparation method, which is prepared from the following components: The concentration is 20-30wt% of formaldehyde solution of 30-50%, 8-12wt% of phenolic substances containing trifunctionality, and the balance is papermaking waste liquid with herbal lignin as the main active substance. It can be seen that the present invention still uses Formaldehyde is the main raw material, and there will inevitably be formaldehyde residues; at the same time, lignin is also widely used in phenolic resin and melamine-formaldehyde resin adhesives, but the same problem of free formaldehyde exists.
[0005] In addition, the current common adhesives contain a small amount of active groups, which are easily oxidized and decomposed by oxygen or light in the environment, causing the adhesive to age and lose its effect, resulting in problems with the quality of wood-based panels or fiberboards used outdoors
However, researchers mostly conduct in-depth research on the structure of raw materials to improve weather resistance and greatly increase the cost of adhesives.

Method used

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  • Lignin weather-resistant fiberboard adhesive and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1 lignin weather resistance fiberboard adhesive production formula and method 1

[0031] Recipe composition:

[0032] 25 parts of lignin;

[0033] 25 parts of phenol;

[0034] 15 parts tapioca starch;

[0035] 0.5 parts of vinyltriethoxysilane;

[0036] 0.5 parts of anilinomethyltriethoxysilane;

[0037] 0.5 part of dibutyl hydroxytoluene;

[0038] Butylated hydroxyanisole 0.5 parts;

[0039] 3 parts of phenyl o-hydroxybenzoate;

[0040] Polydimethylsiloxane 0.1 part.

[0041] Production method: Firstly, pretreat the obtained lignin to obtain modified lignin, then add tapioca starch, silane coupling agent, dibutylhydroxytoluene, butylated hydroxyfennel into the stirring reaction kettle according to the formula ratio Mix ether, phenyl o-hydroxybenzoate and defoamer evenly, and then grind for 1 hour with a three-roll mill to obtain an adhesive with a viscosity of 0.20 Pa·s at 18-20°C.

[0042] Lignin modified products are prepared by the following method...

Embodiment 2

[0045] Example 2 Production formula and method of lignin weather-resistant fiberboard adhesive 2

[0046] Recipe composition:

[0047] 20 parts of lignin;

[0048] 20 parts of phenol;

[0049] 18 parts of potato starch;

[0050] Anilinomethyltriethoxysilane 1 part

[0051] 2 parts of γ-chloropropyltrimethoxysilane;

[0052] Vitamin E 1 part;

[0053] 1 part of tert-butyl hydroquinone;

[0054] 1 part of 2-(2′-hydroxy-5′-methylphenyl)benzotriazole;

[0055] 3 parts of 2,4-dihydroxybenzophenone;

[0056] 0.2 parts of tributyl phosphate.

[0057] Production method: Firstly, the obtained lignin is subjected to a pretreatment reaction to obtain a modified lignin product, and then potato starch, silane coupling agent, vitamin E, and tert-butyl terephthalate are added to the stirred reactor according to the proportion of the formula Phenol, 2-(2ˊ-hydroxy-5ˊ-methylphenyl)benzotriazole, 2,4-dihydroxybenzophenone and defoamer, mixed well, and then milled with a three-roller mil...

Embodiment 3

[0061] Embodiment 3 lignin weather resistance fiberboard adhesive production formula and method 3

[0062] Recipe composition:

[0063] 30 parts of lignin;

[0064] 30 parts of phenol;

[0065] 20 parts flour;

[0066] 2 parts of γ-methacryloxypropyltrimethoxysilane;

[0067] 1 part of 3-(2,3 glycidoxy) propyltrimethoxysilane;

[0068] 2 parts of mercaptopropyltrimethoxysilane;

[0069] 5 parts of tert-butyl hydroquinone;

[0070] 5 parts of 2-hydroxy-4-n-octyloxybenzophenone;

[0071] 0.15 parts of tributyl phosphate.

[0072] Production method: Firstly, the obtained lignin is subjected to a pretreatment reaction to obtain a modified lignin product, and then flour, silane coupling agent, tert-butylhydroquinone, 2-hydroxyl - Mix 4-n-octyloxybenzophenone and defoamer evenly, and grind for 2 hours with a three-roll mill to obtain an adhesive with a viscosity of 0.50 Pa·s at 18-20°C.

[0073] Lignin modified products are prepared by the following methods:

[0074] (1) P...

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Abstract

The invention discloses a lignin weatherproof fiberboard adhesive and a production method thereof. The adhesive comprises the following raw materials in parts by weight: 20-30 parts of lignin, 20-30 parts of phenol, 15-20 parts of starch, 1-5 parts of a silane coupling agent, 1-5 parts of an antioxidant, 3-5 parts of an ultraviolet absorbent and 0.1-0.2 part of a defoamer. The production method comprises the following steps: performing reaction preprocessing on lignin to prepare a lignin modified product, adding the starch, the antioxidant, the ultraviolet absorbent, the silane coupling agent and the defoamer into a reaction kettle in proportion, uniformly mixing, and grinding for 1-2 hours by a three-roller grinder to obtain the adhesive with the viscosity of 0.20-0.50 Pa.s at 18-20 DEG C. The lignin weatherproof fiberboard adhesive is excellent in weatherproof effect, low in cost, good in bonding effect and suitable for large-scale popularization and application.

Description

technical field [0001] The invention relates to the field of adhesives, in particular to a lignin weather-resistant fiberboard adhesive and a production method thereof. Background technique [0002] Fiberboard is a wood-based panel made by interweaving lignin fibers and utilizing its inherent adhesive properties. The most commonly used adhesive for fiberboard is urea-formaldehyde resin or modified urea-formaldehyde resin. The production process of urea-formaldehyde resin is simple and low in cost, but its water resistance and strength are low. Urea-formaldehyde resin modified by melamine, phenol or resorcinol, acrylate copolymer, isocyanate, polyvinyl alcohol or lignin significantly improves water resistance properties and bond strength. One of the raw materials for the production of urea-formaldehyde resin or modified urea-formaldehyde resin is formaldehyde. Therefore, wood-based panels using urea-formaldehyde resin or modified urea-formaldehyde resin as adhesives will in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J197/00C09J103/02C09J11/06C08H7/00
Inventor 何原韦晓灵莫明鑫苏燕
Owner 苏燕
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