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Lignin flame-retardant fiberboard adhesive and production method thereof

A production method and technology of flame retardant fibers, which are applied in the field of lignin flame retardant fiberboard adhesives, can solve the problems of formaldehyde residue and formaldehyde free, and achieve the effects of high bonding strength, low surface tension and improved adhesive performance.

Active Publication Date: 2017-04-12
莫明鑫
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  • Summary
  • 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.

Method used

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  • Lignin flame-retardant fiberboard adhesive and production method thereof

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Experimental program
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Effect test

Embodiment 1

[0027] Embodiment 1 Lignin flame-retardant fiberboard adhesive production formula and method 1

[0028] Recipe composition:

[0029] 25 parts of lignin;

[0030] 25 parts of phenol;

[0031] 15 parts tapioca starch;

[0032] 0.5 parts of vinyltriethoxysilane;

[0033] 0.5 parts of anilinomethyltriethoxysilane;

[0034] 5 parts of ammonium polyphosphate;

[0035] Polydimethylsiloxane 0.1 part.

[0036] Production method: Firstly, the obtained lignin is subjected to a pretreatment reaction to obtain a lignin modified product, and then tapioca starch, vinyltriethoxysilane and anilinomethyltriethoxy are added to the stirred reactor according to the formula ratio Mix silane, ammonium polyphosphate and defoamer evenly, and grind for 1 hour with a three-roll mill to obtain an adhesive with a viscosity of 0.15 Pa·s at 18-20°C

[0037] Lignin modified products are prepared by the following methods:

[0038] (1) Preparation of lignin: add 50wt% sulfuric acid to the pulp black liqu...

Embodiment 2

[0040] Example 2 Production formula and method of lignin flame-retardant fiberboard adhesive 2

[0041] Recipe composition:

[0042] 20 parts of lignin;

[0043] 20 parts of phenol;

[0044] 18 parts of potato starch;

[0045] Anilinomethyltriethoxysilane 1 part

[0046] 1 part of γ-chloropropyltrimethoxysilane;

[0047] 10 parts of magnesium hydroxide;

[0048] Tributyl phosphate 0.1 parts

[0049] Production method: Firstly, the obtained lignin is subjected to a pretreatment reaction to obtain a modified lignin product, and then potato starch, anilinomethyltriethoxysilane and γ-chloropropyltrimethylsilane are added to the stirred reactor according to the formula ratio Oxysilane, magnesium hydroxide and defoamer are mixed evenly, and then ground for 1 hour with a three-roll mill to obtain an adhesive with a viscosity of 0.35 Pa·s at 18-20°C.

[0050] Lignin modified products are prepared by the following methods:

[0051] (1) Preparation of lignin: add 50wt% sulfuric ...

Embodiment 3

[0053] Example 3 Production formula and method of lignin flame-retardant fiberboard adhesive 3

[0054] Recipe composition:

[0055] 30 parts of lignin;

[0056] 30 parts of phenol;

[0057] 20 parts flour;

[0058] 2 parts of γ-methacryloxypropyltrimethoxysilane;

[0059] 1 part of 3-(2,3 glycidoxy) propyltrimethoxysilane;

[0060] 2 parts of mercaptopropyltrimethoxysilane;

[0061] 3 parts of triphenyl phosphate;

[0062] 4 parts of melamine cyanurate;

[0063] Polydimethylsiloxane 0.18 parts.

[0064] Production method: Firstly, the obtained lignin is subjected to a pretreatment reaction to obtain a lignin modified product, and then flour, γ-methacryloxypropyltrimethoxysilane and 3 - (2,3 glycidoxy)propyltrimethoxysilane, mercaptopropyltrimethoxysilane, melamine cyanurate, triphenyl phosphate and defoamer, mix well and grind with a three-roll mill After 2 hours, an adhesive with a viscosity of 0.50 Pa·s at 18-20° C. was obtained.

[0065] Lignin modified products ...

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Abstract

The invention discloses a lignin flame-retardant fiber board adhesive and a production method thereof. The lignin flame-retardant fiber board adhesive is prepared from 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 silane coupling agent, 8-10 parts of flame retardant and 0.1-0.2 part of defoaming agent. The production method comprises the following steps: carrying out pretreatment reaction on the lignin to obtain a lignin modification product, adding the starch, flame retardant, silane coupling agent and defoaming agent into the stirring reaction kettle according to the formula proportion, uniformly mixing, and grinding for 1-2 hours with a three-roller grinder to obtain the adhesive of which the viscosity is 0.15-0.60 Pa.s at 18-20 DEG C. The lignin flame-retardant fiber board adhesive has the advantages of excellent flame-retardant effect, low cost and favorable adhesive effect, and is suitable for wide-range popularization and application.

Description

technical field [0001] The invention relates to the field of adhesives, in particular to a lignin flame-retardant 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 inev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J197/00C09J103/02C09J11/06C09J11/04C08H7/00
Inventor 肖文飞王飞虎邱金城
Owner 莫明鑫
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