CN1208684A

CN1208684A - Method for modifying wood

Info

Publication number: CN1208684A
Application number: CN 98114271
Authority: CN
Inventors: 张译江
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-08-24
Filing date: 1998-08-24
Publication date: 1999-02-24

Abstract

The method for modifying wood is characterized by that the wood undergone the procedures of hydrolytic degreasing, vacuum dehydration and drying treatment is immersed in the modifying solvent prepared by using rosin, synthetic resin (SBS), styrene, gasoline, ethyl alcohol, dimethyl ester, anti-ageing agent and antioxidant, heated and pressurized to make wood fibre retain its original form and form protective film, and can make the wood possess water-proofing, corrosive-resistant and moth-proofing properties. The wood treated by said invented method can be used in the dampness environment, and does not deform, so that it has the extensive application range.

Description

A kind of method for modifying wood

The invention belongs to the guard technology of timber, for a kind ofly preventing wood corrosion, crackle, damage by worms, absorb water, thereby change the method for wood property.

At present the method for Wooden modifying has two kinds of pressurization injection method and deep layer injection methods, its objective is make timber can be anticorrosive, damage by worms etc., impregnating agent generally is certain liquid, liquid contains the salt of various solubilities, these salts have certain toxic effect usually, timber for multiple seeds is inapplicable, and use face is narrower.

Task of the present invention is: overcome the deficiencies in the prior art, propose a kind of improvement character method of applicable various timber, make it waterproof, anticorrosion, increase the service life.

Task of the present invention realizes as follows: the degreasing that is hydrolyzed in the retort of at first timber being packed into, then timber is carried out vacuum dehydration, and after the dehydration timber is put into hothouse and carry out drying, make it water content and reach below 12%; The inherent timber of retort is prepared modifier liquid earlier before packing into, its method is: get rosin 13-17%, synthetic resin (SBS) 15-17%, styrene 0.5-1.5%, ethanol 23%-27%, two formicester 2-4%, age resistor 0.5-1.5%, antioxidant 0.5-1.5%, surplus is a 200# gasoline, and a, that rosin is processed into rosin calcium is standby; B, add in the retort 200# gasoline and ethanol molten altogether and heat simultaneously to 60 ℃; C, styrene sbs, rosin calcium added in the retort simultaneously dissolve, add two formicesters after 2 hours, add age resistor, antioxidant after 30 minutes, after 10 minutes timber is added retort, retort heated once more after 60 ℃, stop to heat, pressurizeing makes a jar internal pressure reach 1-2MPa, and the time is 3 hours, and whole modifying process is finished.

Modified solution avirulence of the present invention can the toxigenicity material, and the raw material source is wide, and cost is low and treatable timber variety is extensively unrestricted; The lumber fibre that adopts method of the present invention to handle can be kept intact, and all fibres all forms diaphragm, because the used resin calcium of modifier is natural resin, is difficult for oxidation, anti-aging; SBS resin and styrene resin are the resins that oil is done raw material, water resistance is good, has rosin calcium to do again and mixes the body complementation, has so just formed excellent waterproof, anti-ly rots, anti-ly damaged by worms, anti crack performance, realize the never purpose of distortion, greatly prolonged the service life of timber.

A most preferred embodiment of the present invention, a, with the timber degreasing that is hydrolyzed in the retort of packing into; B, timber is carried out vacuum dehydration; C, drying reach below 12% the water content of timber; D, preparation modifier: get 15 kilograms of rosin calciums, SBS15 kilogram, 10 kilograms of styrene, 30 kilograms in 200# gasoline, 25 kilograms of ethanol, 3 kilograms of two formicesters, 1 kilogram in age resistor, 1 kilogram of antioxidant; It is standby that rosin is processed into rosin calcium, add in the retort gasoline and ethanol molten altogether simultaneously, be warmed to 60 ℃, then styrene sbs, rosin calcium are added in the retort simultaneously and dissolve, under 60 ℃ condition, dissolved 2 hours, add two formicesters, add age resistor, antioxidant after 30 minutes, just can be used as immersion liquid after 10 minutes timber is carried out the modification processing; E, timber is added in the immersion liquid prepare, retort is heated make it to reach 60 ℃ then, stop heating then, pressurizeing makes a jar internal pressure reach 1-2MPa, continues just to finish in 3 hours whole modifying process.

After whole process finishes the modified solution in the jar is added in the current divider, be warmed to 90 ℃ of shunting solvents 2 hours, the solvent that distributes can be used as modifier next time once more.

Claims

1, a kind of method for modifying wood, comprise the timber degreasing that is hydrolyzed, vacuum dehydration, dry, operations such as modification, it is characterized in that: modified solution is with rosin 13-17%, synthetic resin (SBS) 15-17%, styrene 0.5-1.5%, ethanol 23-27%, two formicester 2-4%, age resistor 0.5-1.5%, antioxidant 0.5-1.5%, surplus is a raw material for 200# gasoline, adopt following technology: it is standby at first rosin to be processed into rosin calcium, add in the retort 200# gasoline and ethanol molten altogether and heat simultaneously to 60 ℃, with styrene sbs, rosin calcium adds in the retort simultaneously and dissolves, add two formicesters after 2 hours, add age resistor after 30 minutes, antioxidant just can add timber timber is carried out the modification processing after 10 minutes; Timber adds the back heats once more to stop to heat after 60 ℃ to retort and pressurizes, and makes a jar internal pressure reach 1-2MPa, and the time is 3 hours, just finishes whole modifying process.

2, method of modifying as claimed in claim 1 is characterized in that: a jar interior modified solution added in the current divider after said modifying process was finished, and was warmed to 90 ℃, shunting solvent 2 hours, and the solvent that distributes can be used as modifier and uses next time again.