CN106363738A - Composite flame retardant and waterproof modifying agent for modification of fast-growing wood for manufacturing outdoor furniture - Google Patents

Abstract

The invention discloses a composite flame retardant and waterproof modifying agent for modification of fast-growing wood for manufacturing outdoor furniture. The composite flame retardant and waterproof modifying agent is prepared from the following raw materials in parts by weight: 3 to 3.5 parts of formaldehyde, 2 to 3 parts of urea, 1.5 to 2 parts of hexamethylene tetramine, 0.02 to 0.03 part of maleic anhydride, a proper amount of acetic acid, a proper amount of ammonium hydroxide, a proper amount of deionized water, 20 to 23 parts of DMDHEU of which the solid content is 42wt%, 1.5 to 2 parts of magnesium chloride hexahydrate, 10 to 11 parts of silica sol, 3 to 4 parts of melamine pyrophosphate, 0.8 to 1 part of 1H,1H,2H,2H-perfluorooctyltrimethoxysilane, 2 to 3 parts of ammonium dihydrogen phosphate, 2 to 3 parts of sodium silicate, a proper amount of glacial acetic acid and a proper amount of absolute ethyl alcohol. According to the composite flame retardant and waterproof modifying agent, the corrosion resistance, waterproofness, deformation resistance and crack resistance of the wood modified through the product are greatly improved, and the outdoor furniture, wooden equipment and wooden tools manufactured through the modified wood have good utilization performance and long service life.

Description

A kind of composite flame-proof water-repellent modified dose modified for manufacturing outdoor furniture fast growing wood

Technical field

The present invention relates to Wood Property Improvement field, more particularly, to a kind of modified for manufacturing outdoor furniture fast growing wood Water-repellent modified dose of composite flame-proof.

Background technology

Timber and wood materials, as the important means of production in social and economic construction, are not only widely used in daily life In every field, be also widely used for the industrial circles such as traffic, building and space flight.With the forest reserves in world wide increasingly Shortage, particularly precious timber quantity increasingly falls sharply, and the substantial amounts of quick growing species of trees is widely cultivated and meets in global range in recent years Wood supply.Compared with natural forest, by growth year is short etc., factor is limited the quick growing species of trees, leads to early late wood's difference very Greatly, material is loose, and mechanical property is poor, thus do not pass through to process artificial fast-growing forest timber be difficult to economical high used in Furniture manufacture etc. Added value field.Due to timber be a kind of natural there is porous macromolecular material, by the little, shapes of different fire and different company The tubular units of understanding and considerate condition are cross-linked and form, and have fluid-pervious, and its distinctive vesicular texture carries for Wooden modifying Supply basis.Physically or chemically modification is carried out to fast-growing forest, not only increases the economic value added of fast-growing forest, also Serve the effect of protection rare tree resource.Wooden modifying refers to using physics, the method such as chemical and mechanical to logs of wood Carry out manufacturability process, make physico-mechanical propertieses such as density of wood, hardness, intensity and dimensional stability etc. obtain good changing Kind.Chemical modification is modified Main Means, the selection of chemical impregnation medicinal liquid wherein in modifying process and the dipping of fast-growing forest The drying process of material is the research emphasis of Chinese scholars.But it is as the raising of living standards of the people and the increasing of environmental consciousness By force, to human health angle, the residual how reducing chemical impregnation medicinal liquid in modified material is chemical modification fast-growing forest Urgent problem, how by fast-growing forest functionalization improvement Study on Integration towards environmental protection and functionalization to be therefore The modified new direction of this paper and from now on fast-growing forest.

" composite modifier is to quick growth poplar wood and Chinese toon wood Modification effect and study mechanism " is in a literary composition by low point of autonomous synthesis Son modification nitrogen footpath methyl performed polymer is combined with hydroxymethyl-2 dihydroxy-ethylene urea, makes many work(by adding plurality of stable agent Can type chemical modifier, preliminary study has been carried out to the timber physicochemical property after before modified and mechanism of modification, by impregnation drying Substantially, heat stability is improved the main mechanical strength improving effect of the modified material after process, and modifying agent is impregnated into wood simultaneously When material is internal, self-condensation effect can be occurred to form tridimensional network, it is higher that modifying agent serves as intensity in wood internal Implant is especially more obvious to dimensional stability and mechanical property improvement result.Although modified fast growing wood is in mechanics Increase in performance, but because it has not significantly affected fast growing wood furniture, open air out of doors to absorptive reduction The application of wooden clothing arts, needs its composite modifier to be modified further it is also desirable to other additional properties can be had To meet the demand to fast growing wood such as outdoor furniture.

Content of the invention

The object of the invention is exactly the defect in order to make up prior art, provides one kind to be used for manufacturing outdoor furniture fast growing wood Water-repellent modified dose modified of composite flame-proof.

The present invention is achieved by the following technical solutions:

A kind of composite flame-proof water-repellent modified dose modified for manufacturing outdoor furniture fast growing wood, by the raw material system of following weight portion Prepare into: formaldehyde 3-3.5, carbamide 2-3, hexamethylenetetramine 1.5-2, maleic anhydride 0.02-0.03, appropriate acetic acid, ammonia are fitted Amount, appropriate deionized water, solid content are the hydroxymethyl-2 dihydroxy-ethylene urea 20-23 of 42wt%, Magnesium dichloride hexahydrate 1.5-2, silicon Colloidal sol 10-11, melamine polyphosphate 3-4,17 fluorine silicon substrate trimethoxy silane 0.8-1, ammonium dihydrogen phosphate 2-3, silicic acid Sodium 2-3, appropriate glacial acetic acid, appropriate dehydrated alcohol.

A kind of described composite flame-proof water-repellent modified dose modified for manufacturing outdoor furniture fast growing wood, by walking in detail below Suddenly make:

(1) formaldehyde, carbamide, hexamethylenetetramine are put in reactor, add maleic anhydride, be heated to completely molten while stirring Solution, adds the deionized water of total amount 1.5-2 times amount, is heated to 70-80 DEG C, uses acetic acid and ammonia to adjust after stirring reaction 3-4 hour Section ph value is 7, terminates reaction；

(2) by 17 fluorine silicon substrate trimethoxy silanes add 20-25 times amount dehydrated alcohol in, with 300- under room temperature condition The speed stirring 15-20 minute of 400 turns/part, being subsequently adding glacial acetic acid and adjusting ph is 3-4, and heating in water bath, to 60-65 DEG C, continues Stirring 30-40 minute, adds melamine polyphosphate, ammonium dihydrogen phosphate, sodium silicate, with 600-800 after being cooled to room temperature Turn/the speed of part stirring 60-90 minute；

(3) by solid content, the hydroxymethyl-2 dihydroxy-ethylene urea for 42wt% is mixed with Ludox, with 500-600 rev/min of speed Product and remaining residual components that after stirring 10-15 minute, addition step (1) step (2) obtains, continue ultrasonic disperse 15-20 Minute, obtain final product.

The invention has the advantage that formaldehyde, carbamide, hexamethylenetetramine are carried out reaction life by certain technique by the present invention Become performed polymer, then by being compounded with hydroxymethyl-2 dihydroxy-ethylene urea, Ludox, magnesium chloride, can after supersound process To form colloidal sol type composite modifier, wherein si-0-si framing structure plays Stabilization to modifier system, by timber Carry out impregnation process, timber pickling degree of modification can be significantly improved, improve the rate of body weight gain of timber；Composite modifier can be in wood It is scattered in the cell wall microcellular structure of timber well, with Wood chemical composition in subsequent heat drying in material dipping process In cellulose, hemicellulose, lignin etc. there is situ-gel polyreaction, chemical reaction finally makes the sense between them Group can connect formation covalent bond, and covalent bond is very firm, thus the bending strength of modified fast growing wood, Deflection Modulus of Elasticity and Parallel-to-grain compressive strength all improves a lot；Simultaneously composite modifier can also with the main chemical compositions cellulose of timber, half There is etherification reaction in cellulose and lignin, such reaction can reduce hydrophilic hydroxy group in timber, thus significantly reducing wood Material hygroscopicity.

Present component proportioning is scientific and reasonable, and melamine polyphosphate, sodium silicate and Ludox compound, and synergism enters One step improves flame-retardant smoke inhibition effect；The modifying agent that the present invention makes passes through to impregnate fast growing wood, it is possible to increase the intensity of timber And fire resistance, modified wood preservation, waterproof, anti-deformation and crack resistence performance be improved significantly, with modified The outdoor furniture of timber manufacture, wooden equipment, wooden instrument etc. have good serviceability and service life.

Specific embodiment

A kind of composite flame-proof water-repellent modified dose modified for manufacturing outdoor furniture fast growing wood, (public by following weight portion Jin) raw material make: formaldehyde 3, carbamide 2, hexamethylenetetramine 1.5, maleic anhydride 0.02, appropriate acetic acid, appropriate ammonia, Appropriate deionized water, solid content are the hydroxymethyl-2 dihydroxy-ethylene urea 20 of 42wt%, Magnesium dichloride hexahydrate 1.5, Ludox 10, Melamine polyphosphate 3,17 fluorine silicon substrate trimethoxy silanes 0.8, ammonium dihydrogen phosphate 2, sodium silicate 2, appropriate glacial acetic acid, no Appropriate water-ethanol.

A kind of described composite flame-proof water-repellent modified dose modified for manufacturing outdoor furniture fast growing wood, by walking in detail below Suddenly make:

(1) formaldehyde, carbamide, hexamethylenetetramine are put in reactor, add maleic anhydride, be heated to completely molten while stirring Solution, adds the deionized water of total amount 1.5 times amount, is heated to 70 DEG C, and stirring reaction adjusts ph value with acetic acid and ammonia after 3 hours and is 7, terminate reaction；

(2) by the dehydrated alcohol adding 20 times amount in 17 fluorine silicon substrate trimethoxy silanes, with 300 turns/part under room temperature condition Speed stir 15 minutes, be subsequently adding glacial acetic acid adjust ph be 3, heating in water bath to 60 DEG C, continue stirring 30 minutes, be cooled to Add melamine polyphosphate, ammonium dihydrogen phosphate, sodium silicate after room temperature, stir 60 minutes i.e. with the speed of 600 turns/part Can；

(3) by solid content, the hydroxymethyl-2 dihydroxy-ethylene urea for 42wt% is mixed with Ludox, with 500 revs/min of speed stirring Product and remaining residual components that after 10 minutes, addition step (1) step (2) obtains, continue ultrasonic disperse 15 minutes, obtain final product.

Fast growing wood is processed into the veneer of certain specification, being dried to moisture content is 6-10%, puts into vacuum pressure impregnation In tank, after being evacuated to -0.01mpa, keep 30-40 minute, be then rapidly injected modifying agent of the present invention, continue to keep 40-50 Minute, it is forced into 0.89-0.9 mpa afterwards and keep 15-20 minute；After sheet material is taken out, environment air dry disposed within is extremely aqueous Rate is less than 30%, is then placed in baking oven, first 6-8 hour is dried at 80-90 DEG C, then solidifies 4-5 hour at 120-130 DEG C, cold But discharging after obtains modified fast growing wood.Modified fast growing wood is compared with unmodified timber, Absolute Dry Density Improve 67.7%, bending strength improves 60.9%, parallel-to-grain compressive strength improves 17.7%, and whole water absorption rate reduces 32.9%.

Claims (2)

1. a kind of for manufacturing water-repellent modified dose modified of composite flame-proof of outdoor furniture fast growing wood it is characterised in that by following The raw material of weight portion is made: formaldehyde 3-3.5, carbamide 2-3, hexamethylenetetramine 1.5-2, maleic anhydride 0.02-0.03, vinegar Acid is appropriate, appropriate ammonia, appropriate deionized water, solid content are the hydroxymethyl-2 dihydroxy-ethylene urea 20-23 of 42wt%, six are hydrated Magnesium chloride 1.5-2, Ludox 10-11, melamine polyphosphate 3-4,17 fluorine silicon substrate trimethoxy silane 0.8-1, phosphoric acid Ammonium dihydrogen 2-3, sodium silicate 2-3, appropriate glacial acetic acid, appropriate dehydrated alcohol.

2. a kind of composite flame-proof water-repellent modified dose modified for manufacturing outdoor furniture fast growing wood according to claim 1, It is characterized in that, it is made up of step in detail below:

(1) formaldehyde, carbamide, hexamethylenetetramine are put in reactor, add maleic anhydride, be heated to completely molten while stirring Solution, adds the deionized water of total amount 1.5-2 times amount, is heated to 70-80 DEG C, uses acetic acid and ammonia to adjust after stirring reaction 3-4 hour Section ph value is 7, terminates reaction；

(2) by 17 fluorine silicon substrate trimethoxy silanes add 20-25 times amount dehydrated alcohol in, with 300- under room temperature condition The speed stirring 15-20 minute of 400 turns/part, being subsequently adding glacial acetic acid and adjusting ph is 3-4, and heating in water bath, to 60-65 DEG C, continues Stirring 30-40 minute, adds melamine polyphosphate, ammonium dihydrogen phosphate, sodium silicate, with 600-800 after being cooled to room temperature Turn/the speed of part stirring 60-90 minute；

(3) by solid content, the hydroxymethyl-2 dihydroxy-ethylene urea for 42wt% is mixed with Ludox, with 500-600 rev/min of speed Product and remaining residual components that after stirring 10-15 minute, addition step (1) step (2) obtains, continue ultrasonic disperse 15-20 Minute, obtain final product.