Flame-retardant wood adhesive as well as preparation method and application thereof

A wood adhesive and flame-retardant technology, applied in the field of formaldehyde-free flame-retardant composite wood, can solve the problems of flame-retardant component migration loss, incomplete chemical reaction, etc., achieve good flame-retardant performance, simple and easy operation, and process operation simple effect

Inactive Publication Date: 2014-05-07
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, within the technical conditions of this patent, the chemical reaction (esterification) between the flame-retardant phosphoric acid or boric acid and the hydroxyl-containing polyvinyl alcohol polymer is very incomplete, and there are still some flame retardants in the final composite wood. In a free state, under certain conditions, if the composite wood is washed or soaked in water, it will still cause the migration loss of flame retardant components.

Method used

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  • Flame-retardant wood adhesive as well as preparation method and application thereof
  • Flame-retardant wood adhesive as well as preparation method and application thereof
  • Flame-retardant wood adhesive as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Preparation of melamine phosphogluconate mixed salt flame retardant

[0027] Add phosphoric acid 39.2g (0.4 moles, 1.2 chemical equivalents), gluconic acid 352.8g (1.8 moles, 1.8 chemical equivalents) and deionized water 2352g into a reactor with heating and stirring, at a temperature of 75°C, under stirring Slowly add melamine 126g (1.0 moles, 3.0 chemical equivalents), keep it warm for 6 hours, then cool down to room temperature, let stand for 24 hours, and precipitate mixed salts. After filtering, drying and crushing, the white powdery melamine phosphogluconate mixed salt flame retardant was obtained.

[0028] (2) Preparation of flame retardant wood adhesive

[0029] In a reactor equipped with heating, stirring and temperature control devices, add 85 parts of water, heat to 85°C, add 16 parts of polyvinyl alcohol under stirring, maintain the temperature, and stir until the polyvinyl alcohol is completely dissolved. Then slowly add 12 parts of phosphogluconate m...

Embodiment 2

[0038] (1) Preparation of melamine phosphogluconate mixed salt flame retardant

[0039] Add 58.8g of phosphoric acid (0.6 mol, 1.8 chemical equivalent), 294g of gluconic acid (1.5 mol, 1.5 chemical equivalent), and 1764g of deionized water into the reactor with heating and stirring, at a temperature of 85 ° C, under stirring Slowly add 138.6 g of melamine (1.1 moles, 3.3 chemical equivalents), keep the temperature for 5 hours, then cool down to room temperature, and let it stand for 24 hours to precipitate mixed salts. After filtering, drying and crushing, the white powdery melamine phosphogluconate mixed salt flame retardant was obtained.

[0040] (2) Preparation of flame retardant wood adhesive

[0041] In a reactor equipped with heating, stirring and temperature control devices, add 90 parts of water, heat to 85°C, add 17 parts of polyvinyl alcohol under stirring, maintain the temperature, and stir until the polyvinyl alcohol is completely dissolved. Slowly add 14 parts o...

Embodiment 3

[0050] (1) Preparation of melamine phosphogluconate mixed salt flame retardant

[0051] Add 73.5g of phosphoric acid (0.75 moles, 2.25 chemical equivalents), 235.2g of gluconic acid (1.2 moles, 1.2 chemical equivalents) and 1543.5g of deionized water into a reactor with heating and stirring, at a temperature of 90°C, while stirring Slowly add 144.9 g of melamine (1.15 moles, 3.45 chemical equivalents) under low temperature, keep the temperature for 4 hours, then cool down to room temperature, let it stand for 24 hours, and precipitate mixed salts. After filtering, drying and crushing, the white powdery melamine phosphogluconate mixed salt flame retardant was obtained.

[0052] (2) Preparation of flame retardant wood adhesive

[0053] In a reactor equipped with heating, stirring and temperature control devices, add 95 parts of water, heat to 90°C, add 18 parts of polyvinyl alcohol under stirring, maintain the temperature, and stir until the polyvinyl alcohol is completely diss...

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Abstract

The invention discloses a flame-retardant wood adhesive as well as a preparation method and application thereof. The flame-retardant wood adhesive is characterized by being prepared by the steps of adding 85-100 parts of water to a reactor, heating to 85-95 DEG C, adding 16-20 parts of polyvinyl alcohol while stirring so as to dissolve the polyvinyl alcohol, slowly adding 12-18 parts of a phosphogluconate melamine mixed salt flame retardant, and cooling to room temperature to obtain the flame-retardant wood adhesive, wherein diphenylmethane diisocyanate or polymethylene polyphenylene isocyanate is taken as a curing agent, and the adhesive and the curing agent are respectively packaged in storage. When the adhesive is used, 35-45 parts of the isocyanate curing agent is added to 100 parts of the adhesive. And an application method of the flame-retardant wood adhesive comprises the steps of mixing 18-25 parts of the flame-retardant wood adhesive and 6.3-11.25 parts of the isocyanate curing agent in a stirrer, adding 75-84 parts of wood meal, continuing to uniformly stir, injecting materials to a mold, placing the mold into a hot press, and hot-pressing for 20-25 minutes at 75-100 DEG C under 10-15MPa, thus obtaining flame-retardant composite wood.

Description

technical field [0001] The invention relates to a flame-retardant wood adhesive and its preparation method and application, especially a flame-retardant wood adhesive composed of a phosphorus-containing, nitrogen-containing, and polyhydroxy-containing reactive flame retardant and a polyvinyl alcohol / isocyanate system The adhesive and its preparation method and application belong to the technical field of formaldehyde-free flame-retardant composite wood. Background technique [0002] With the development of society and the process of urbanization, solid wood material resources are gradually exhausted. In the fields of construction and decoration engineering, furniture manufacturing and other fields, fiberboard, particleboard and sawdust board made of small-diameter wood fiber, shavings, wood chips and other materials and adhesives Composite wood such as composite wood has gradually become the main raw material for various wood products. In today's world, people have two basi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/65C08G18/62C08G18/32C08L97/02C08L75/04
CPCC08G18/3268C08G18/6212C08G18/6529C08G18/6541C08L97/02C08L75/04
Inventor 杨冰张弩杨述武李响
Owner SICHUAN UNIV
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