CN102040952A - Oily composition for wood processing and application thereof - Google Patents

Abstract

The present invention relates to an oily composition for wood processing and its application. The oily composition for wood processing, relative to the total weight of the oily composition, comprises: a) 20-80% by weight of an iodine value of at least 100 unsaturated fatty oil; b) 20-80% by weight of an oligomer modified by an unsaturated fatty oil with an iodine value of at least 100; c) 0-30% by weight of a non-reactive diluent; and d) 0- 2% by weight of desiccant. The present invention further relates to a method for manufacturing wooden furniture, the method comprising: applying the oily composition according to the present invention to a wooden substrate; using the oily composition as a coolant to treat the wooden substrate Carve.

Description

Oily composition for wood processing and its application

technical field

The present invention relates to an oily composition, more specifically, to an oily composition for wood processing. The invention also relates to the use of this oily composition in woodworking.

Background technique

In the past wooden furniture manufacturing process, craftsmen manually cut (such as carving) wooden furniture to form wooden furniture with different sizes and different patterns. Early carvings were usually simple geometric shapes. As sculpting tools improved, carvings became more and more aesthetically pleasing, often featuring lines of simple elements commonly found in nature (such as flowers, leaves, vines, etc.).

Wood carving can be done by hand carving or by machine carving. Hand-carving is the most delicate work in furniture processing. Through carving, the texture of wood is highlighted and the corners are naturally transitioned while showing patterns through carving. But hand-carving artisans can only carve one piece of material at a time. Machine engraving is suitable for large-scale production. It can engrave many pieces of material at the same time by moving the engraving needle on the stencil, but the engraving result is usually rough and not fine.

Carving, whether by hand or machine, typically generates a lot of heat, which can char the wood and cause burn marks. The burn mark is extremely difficult to remove only by manual polishing. Therefore, engravers usually use machine hydraulic oil (mainly composed of saturated mineral oil) or various polyolefin-based oils that are readily available in the factory as coolants to prevent the formation of burn marks.

Although the use of this hydraulic oil or base oil solves the problem of burn marks, it also brings other side effects. For example, when excess hydraulic oil is applied, the hydraulic oil does not solidify but is absorbed by the wood. Subsequently (usually hours or days or longer after the engraving process is complete), when a coating (such as a nitrocellulose coating) is applied to the carved wood, the excess hydraulic pressure contained in the wood Oils can create compatibility issues with the nitrocellulose coating, resulting in white spots (also known as "blushing"). In order to remove this white spot, the wood needs to be treated again, which undoubtedly increases the production cost and production time. In addition, excess hydraulic oil can soften painted layers such as nitrocellulose coatings, causing adhesion problems between the coating and wood materials.

Contents of the invention

The object of the present invention is to provide an oily composition for wood processing, which does not have the above-mentioned problems when using machine hydraulic oil or various polyolefin-based oils as coolants.

Therefore, the present invention provides an oily composition for wood processing, relative to the total weight of the oily composition, comprising:

a) 20-80% by weight of an unsaturated fatty oil with an iodine value of at least 100;

b) 20-80% by weight of oligomers modified with unsaturated fatty oils having an iodine value of at least 100;

c) 0-30% by weight of non-reactive diluent; and

d) 0-2% by weight of desiccant.

The present invention also provides a method for manufacturing wooden furniture, the method comprising: applying the oily composition according to the present invention to a wooden substrate; using the oily composition as a coolant to treat the wooden substrate Carve.

The inventors have surprisingly found that unsaturated fats with an iodine value Oxidative crosslinking of the ethylenically unsaturated bonds in the oil results in gradual drying. Therefore, even if an excessive amount of unsaturated fatty oil remains in the wood, it will not cause compatibility problems with the coating applied thereon (such as nitrocellulose coating), and thus will not cause the problem of whitening. Also, since the unsaturated fatty oil in the oily composition of the present invention is oxidatively cross-linked to dry after application, even if an excessive amount of unsaturated fatty oil remains in the wood, it does not soften the coating applied thereon. (e.g. nitrocellulose coating). On the other hand, the unsaturated fatty oil can chemically and/or physically interact with a coating subsequently applied thereon, such as a nitrocellulose coating, so that the unsaturated fatty oil interacts The compatibility between the two coatings is improved, which in turn improves the adhesion between the nitrocellulose coating and the wood substrate.

In addition, the present inventors surprisingly found that when the oligomer modified by unsaturated fatty oil is used in combination with unsaturated fatty oil as a coolant in wood processing, since the unsaturated functional groups in the oligomer can interact with The unsaturated fatty oil component reacts, thereby rapidly increasing the molecular weight of the unsaturated fatty oil, thereby accelerating the oxidative crosslinking (ie, drying) of the unsaturated fatty oil.

Detailed ways

The present invention provides an oily composition comprising: a) an unsaturated fatty oil with an iodine value of at least 100; b) an oligomer modified with an unsaturated fatty oil with an iodine value of at least 100; and c) an optional non-reactive diluent; and d) an optional desiccant.

The term "iodine value" used herein represents an indicator of the degree of unsaturation of organic compounds (such as unsaturated fatty acids and fatty oils), and is also an important parameter to represent the oxidative drying rate of organic compounds, which specifically refers to the amount that can be absorbed in 100g of organic matter (addition) grams of iodine.

Those of ordinary skill in the art adopt Wijs reagent to carry out the mensuration of iodine value according to DIN 53 241, and specific testing process is as follows: dissolve the sample to be tested in the solvent, add above-mentioned Wijs reagent again, keep at the temperature of 20-25 ℃ 30-60 minutes, then add potassium iodide solution and water, titrate with sodium thiosulfate, and use starch solution as indicator to calculate the iodine value. The greater the degree of unsaturation of the compound, the higher the iodine value.

The term "unsaturated fatty oil" is understood herein as a fatty oil having ethylenic unsaturation. An unsaturated fatty oil having an iodine value of at least 100 is understood herein as meaning that 100 grams of an unsaturated fatty oil can undergo an addition reaction with at least 100 grams of iodine. Unsaturated fatty oils with an iodine value of 100-130 are generally called semi-dry oils, and unsaturated fatty oils with an iodine value > 130 are generally called dry oils.

The unsaturated fatty oil with an iodine value ≥ 100 can dry to form a film through oxidative cross-linking, and the drying time depends on the iodine value of the unsaturated fatty oil, which usually takes hours or even days. Preferably, in an embodiment of the invention, the unsaturated fatty oil has an iodine value of at least 100, more preferably 110, more preferably 115, still more preferably 120, even more preferably 130, 140, 150, 160 , 170, 180 or higher. According to the invention, the upper limit of the iodine value of the unsaturated fatty oil is not critical and will depend only on the availability of the unsaturated fatty oil itself with this upper limit of iodine value. Considering the source and availability of the unsaturated fatty oil, in a preferred embodiment of the present invention, the iodine value of the unsaturated fatty oil is at most 250, preferably at most 240, more preferably at most 230, even more preferably at most 220 , most preferably at most 200.

Without being bound by any theory, oxidative crossover of ethylenically unsaturated bonds in unsaturated fatty oils having an iodine number ≥ 100 occurs at least hours to days after application to a wood substrate (i.e. engraving). Combined to gradually dry. Therefore, even if an excessive amount of unsaturated fatty oil remains in the wood, there will be no problem of compatibility with the coating layer (such as nitrocellulose coating) applied thereon, and thus no problem of blushing. Moreover, since the unsaturated fatty oil in the oily composition of the present invention dries after being applied by oxidative crosslinking, even if an excessive amount of unsaturated fatty oil remains in the wood, it does not soften the coating applied thereon. layer (e.g. nitrocellulose coating). On the other hand, this unsaturated fatty oil will form a chemical and/or physical interaction with the coating layer applied thereon, such as nitrocellulose coating, so that this unsaturated fatty oil and nitrocellulose The compatibility between the two plain coatings is improved, and the adhesion between the nitrocellulose coating and the wood substrate is also improved.

In an embodiment of the present invention, examples of the unsaturated fatty oil may be synthetic fatty oil, vegetable oil, and combinations thereof.

In a preferred embodiment of the present invention, the synthetic fatty oil may be an ester synthesized from an unsaturated fatty acid with 16-22 carbon atoms and glycerin by conventional techniques. The unsaturated fatty acid may be selected from the group consisting of linoleic acid (C18), linolenic acid (C18), arachidonic acid (C20), oleic acid (C18) and combinations thereof.

In another embodiment of the present invention, the vegetable oil may be selected from the group consisting of linseed oil, poppy seed oil, tung oil, dehydrated castor oil, safflower oil, sunflower oil, soybean oil, octopus oil, perilla oil, walnut Group consisting of oils and their combinations.

In a preferred embodiment of the invention, an example of an unsaturated fatty oil is linseed oil (Alkali Refined Linseed Oil from Alberdingk Boley) with an iodine value of 175 as determined according to DIN53241.

In a preferred embodiment of the present invention, the oily composition may contain 20% by weight to 80% by weight of unsaturated fatty oil relative to the total weight of the oily composition. Specifically, the oily composition may contain 20% by weight, 25% by weight, 30% by weight, 35% by weight, 40% by weight, 45% by weight, 50% by weight, 55% by weight relative to the total weight of the oily composition , 60%, 65%, 70%, 75% or 80% by weight of unsaturated fatty oil.

The term "oligomer modified with an unsaturated fatty oil having an iodine value of at least 100" is understood herein to mean any oligomer modified with an unsaturated fatty oil having an iodine value of at least 100, which may be Polyurethane resins modified by saturated fatty oils, polyesters modified by unsaturated fatty oils, epoxy modified by unsaturated fatty oils, polyacrylates modified by unsaturated fatty oils and those known to those skilled in the art Other oligomers that can be modified with unsaturated fatty oils.

In the present invention, the unsaturated fatty oil having an iodine value of at least 100 that can be used for modifying oligomers is as described above. In the oily composition according to the present invention, the unsaturated fatty oil used for the modified oligomer and the unsaturated fatty oil used as the component a) alone may be the same or different. Examples include, but are not limited to, soybean oil, linseed oil, tung oil, dehydrated castor oil, cottonseed oil, poppy seed oil, safflower oil, sunflower oil, otti oil, perilla oil, or walnut oil.

Without being bound by any theory, the ethylenically unsaturated groups of the unsaturated fatty oil contained in the unsaturated fatty oil-modified oligomer can react with the unsaturated fatty oil component, which makes the relatively low molecular weight The molecular weight of the unsaturated fatty oil component increases rapidly, thereby accelerating the drying speed of the unsaturated fatty oil component. According to the function of the unsaturated fatty oil modified oligomer in the oily composition of the present invention, the unsaturated fatty oil modified oligomer may also be called "chain extender".

Therefore, the content of unsaturated fatty oil in the oligomer modified by unsaturated fatty oil depends on the type and molecular weight of the oligomer, the type of unsaturated fatty oil, application requirements (including drying speed and viscosity, etc.) and available Sex etc. can vary over a wide range. In a preferred embodiment of the present invention, the content of unsaturated fatty oil in the oligomer modified by unsaturated fatty oil can be in the range of 10-40% by weight relative to the total weight of the oligomer, preferably In the range of 15-35% by weight, more preferably in the range of 20-30% by weight. When the unsaturated fatty oil content in the unsaturated fatty oil-modified oligomer is within the above preferred range, the handling performance (drying time) of the oily composition of the present invention is optimal. The content of the unsaturated fatty oil in the oligomer modified by the unsaturated fatty oil can be determined by a measurement technique known to those of ordinary skill in the art.

A1522-55(被大豆油改性的聚氨酯)，其中大豆油的碘值为120-139。当使用硝基纤维素涂层作为涂装层时，被不饱和脂肪油改性的聚氨酯树脂是尤其优选的，因为其可以与硝基纤维素涂层发生化学和/或物理作用，从而提高相容性。In a preferred embodiment of the present invention, the oligomer modified with unsaturated fatty oil is, for example, a polyurethane resin modified with unsaturated fatty oil. In a more preferred embodiment of the present invention, the oligomer modified by unsaturated fatty oil is DAILY Polymer Corp.

A1522-55 (polyurethane modified by soybean oil), wherein the iodine value of soybean oil is 120-139. When nitrocellulose coating is used as the coating layer, polyurethane resin modified by unsaturated fatty oil is especially preferred because it can chemically and/or physically interact with the nitrocellulose coating to improve phase Capacitance.

In addition, various coating layers commonly used in the field of wooden furniture manufacturing, such as nitro Cellulose coatings, polyurethane coatings, epoxy coatings, and various finishes known to those of ordinary skill in the art. In addition, depending on the kind of coating layer to be applied on the carved wood substrate, chemical and/or physical interaction between the oligomer modified by unsaturated fatty oil and the coating layer may also be considered to determine Select polyester modified by unsaturated fatty oil, epoxy modified by unsaturated fatty oil, polyacrylate modified by unsaturated fatty oil or known by those of ordinary skill in the art that can be modified by unsaturated fatty oil Sexual other oligomers. These unsaturated fatty oil-modified oligomers are generally commercially available, and can also be prepared individually by known conventional methods.

In a preferred embodiment of the present invention, the oily composition may contain 20% by weight to 80% by weight of the unsaturated fatty oil-modified oligomer relative to the total weight of the oily composition. Specifically, the oily composition may contain 20% by weight, 25% by weight, 30% by weight, 35% by weight, 40% by weight, 45% by weight, 50% by weight, 55% by weight relative to the total weight of the oily composition , 60% by weight, 65% by weight, 70% by weight, 75% by weight or 80% by weight of oligomers modified by unsaturated fatty oil.

The term "non-reactive diluent" refers herein to a solvent that acts primarily as a diluent in the oily composition, which is chemically inert in the oily composition.

In embodiments of the present invention, non-reactive diluents include aromatic hydrocarbons and esters well known to those of ordinary skill in the art. Representative examples may include xylene, toluene, isobutanol, methyl isobutyl ketone (MIBK), naphtha, butylcellosolve, butyl glycol acetate, acetic acid Butyl esters, ethyl acetate, white spirit, turpentine and mixtures thereof.

In a preferred embodiment of the invention white spirit is used as non-reactive diluent.

In a preferred embodiment of the present invention, the oily composition may contain a non-reactive diluent in an amount of 0% to 30% by weight relative to the total weight of the oily composition. Specifically, the oily composition may contain 0% by weight, 5% by weight, 10% by weight, 15% by weight, 17% by weight, 19.5% by weight, 20% by weight, 25% by weight relative to the total weight of the oily composition or 30% by weight of non-reactive diluent.

The term "drying agent" is understood herein as a substance that further increases the speed of oxidative crosslinking of the ethylenically unsaturated groups contained in the above-mentioned unsaturated fatty oils and the above-mentioned oligomers, thereby shortening the drying time, also known as as a "catalyst".

In an embodiment of the present invention, the desiccant is selected from lead naphthenate, lead linoleate, lead resinate, cobalt naphthenate, cobalt linoleate, cobalt resinate, manganese naphthenate, manganese linoleate, A group consisting of manganese resinate, iron naphthenate, iron linoleate, iron resinate, zinc naphthenate, zinc linoleate, zinc resinate, zirconium synthetic fatty acid, and combinations thereof.

In a preferred embodiment of the present invention, TROYMARX ^™ ZIRCONIUM 6 (comprising zirconium salts) from Troy Corporation is used as desiccant. In another preferred embodiment of the present invention TEXIDRIMANGANESES 10% WD (containing manganese salts) from APS Polymer & Additives is used as desiccant. In another preferred embodiment of the present invention TEXIDRI Cobalt 10% SUPERCO (containing cobalt salts) from APS Polymer & Additives is used as desiccant.

In a preferred embodiment of the present invention, the oily composition may contain a desiccant in an amount of 0% to 2% by weight relative to the total weight of the oily composition. Specifically, the oily composition may contain 0% by weight, 0.2% by weight, 0.3% by weight, 0.4% by weight, 0.5% by weight, 0.6% by weight, 0.8% by weight, 1.0% by weight relative to the total weight of the oily composition , 1.2% by weight, 1.4% by weight, 1.6% by weight, 1.8% by weight or 2.0% by weight of desiccant.

The oily composition according to the present invention may also contain one or more conventional additives as needed. Representative conventional additives include surfactants, antioxidants, antimicrobials, preservatives, and any other suitable conventional additives. The use and amounts of these conventional additives are known to those of ordinary skill in the art.

The preparation of the oily composition of the present invention can be carried out by using methods for preparing compositions well known to those skilled in the art. For example, the components in the oily composition can be mixed simultaneously using a container-replaceable mixer, a roller mixer, and any other paint mixing device known to those of ordinary skill in the art to be suitable for mixing the composition to form the oily composition, Or first mix the oligomer and non-reactive diluent uniformly, and then add unsaturated fatty oil to form an oily composition.

In a preferred embodiment of the present invention, the oily composition for wood processing, relative to the total weight of the oily composition, comprises:

a) 20-80% by weight of an unsaturated fatty oil with an iodine value of at least 100;

b) 20-80% by weight of oligomers modified with unsaturated fatty oils having an iodine value of at least 100;

c) 0-30% by weight of non-reactive diluent; and

d) 0-2% by weight of desiccant.

In a more preferred embodiment of the present invention, the oily composition for wood processing, relative to the total weight of the oily composition, comprises:

a) 30-50% by weight of an unsaturated fatty oil with an iodine value of at least 100;

b) 30-50% by weight of an oil-modified oligomer having an iodine number of at least 100;

c) 15-25% by weight of non-reactive diluent; and

d) 0.2-1.5% by weight of desiccant.

The present invention also provides a method for manufacturing wooden furniture, the method comprising: applying the above-mentioned oily composition according to the present invention to a wooden substrate; using the oily composition as a coolant to Substrate for engraving.

In a preferred embodiment of the present invention, the wood substrate can be engraved by hand or machine engraving.

In a preferred embodiment of the invention, the paint layer is applied at least several hours or even days after the oily composition of the invention has been applied to the wooden substrate (i.e. engraved according to the design), without relative Capacitance and adhesion issues.

The present invention is further illustrated by the following examples, but the present invention is not limited thereto. All percentages are by weight unless otherwise stated.

Example

Raw material list

Embodiment 1: the preparation of oily composition

Table 1

*The desiccant can be any one of materials 4, 5 and 6 listed in Table 1, and can also be any combination of them.

The components in Table 1 were uniformly mixed to form an oily composition.

Example 3: Applying a Nitrocellulose Coating

Step a. Engraving Wooden Substrate

Wooden furniture parts (wooden substrates) are engraved by hand or machine according to design, while using the oily composition according to the invention as coolant. The carved furniture parts are then sent to the assembly line for assembly or processing and polished smooth, and then ready for the painting process.

Step b. Apply Nitrocellulose Coating

The coating process is a conventional process in the art. The specific process is as follows: the stain is applied to the wood substrate, and then the nitrocellulose sealer (NC wash coat) is applied. After drying, the sealer primer is sanded and then varnished. Next apply two coats of nitrocellulose sealer with sanding in between. Finish by spraying stain on the sanded smooth sealer, followed by two coats of nitrocellulose varnish.

The inventors found that the application of the nitrocellulose coating 8 hours after the oily composition of the invention was applied to the wood substrate (i.e. engraving) resulted in no compatibility and no adhesion at all And other issues. The present inventors also found that when the prior art oily composition containing a hydraulic base oil was applied to a wooden substrate as a coolant for engraving, the coolant could not dry. When this coolant is not sufficiently dried, the topcoat (eg nitrocellulose coating) applied to it often suffers technical problems such as whitishness, peeling and the like.

Various modifications and variations to this invention will become apparent to those skilled in the art without departing from the invention. Accordingly, it should be realized that the invention is not limited to the illustrative embodiments described above.

Claims (12)

1. wood working Unctuous compositions, the gross weight with respect to described Unctuous compositions comprises:

A) iodine number of 20-80 weight % is at least 100 unsaturated fatty acids oil;

B) 20-80 weight %'s is the oligopolymer of at least 100 unsaturated fatty acids oil modification by iodine number;

C) non-reactive diluent of 0-30 weight %; With

D) siccative of 0-2 weight %.

2. Unctuous compositions as claimed in claim 1, the gross weight with respect to described Unctuous compositions comprises:

A) the described iodine number of 30-50 weight % is at least 100 unsaturated fatty acids oil;

B) the described of 30-50 weight % is the oligopolymer of at least 100 unsaturated fatty acids oil modification by iodine number;

C) the described non-reactive diluent of 15-25 weight %; With

D) the described siccative of 0.2-1.5 weight %.

3. Unctuous compositions as claimed in claim 1 or 2, wherein, the iodine number of described unsaturated fatty acids oil is at least 115.

4. Unctuous compositions as claimed in claim 1 or 2, wherein, the group that the free synthetic fat oil of described unsaturated fatty acids grease separation, vegetables oil and combination thereof are formed.

5. Unctuous compositions as claimed in claim 4, wherein, described synthetic fat oil is by unsaturated fatty acids with 16-22 carbon atom and the synthetic ester that obtains of glycerine.

6. Unctuous compositions as claimed in claim 5, wherein, described unsaturated fatty acids is selected from the group of being made up of linolic acid, linolenic acid, arachidonic acid, eleostearic acid and combination thereof.

7. Unctuous compositions as claimed in claim 4, wherein, described vegetables oil is selected from the group of being made up of Toenol 1140, poppyseed oil, tung oil, synourin oil, Oleum Gossypii semen, Thistle oil, sunflower oil, soybean oil, the base of a fruit difficult to understand tree oil, perilla oil, Walnut oil. and combination thereof.

8. Unctuous compositions as claimed in claim 1 or 2, wherein, described oligopolymer by the modification of unsaturated fatty acids oil is selected from by by the urethane resin of unsaturated fatty acids oil modification, by the polyester of unsaturated fatty acids oil modification, by the epoxy of unsaturated fatty acids oil modification, by the polyacrylic ester of unsaturated fatty acids oil modification and the group of forming thereof.

9. Unctuous compositions as claimed in claim 1 or 2, wherein, described non-reactive diluent is selected from the group of being made up of dimethylbenzene, toluene, isopropylcarbinol, hexone, petroleum naphtha, butyleneglycol list ether, butyl glycol ether acetic ester, butylacetate, ethyl acetate, petroleum solvent and turps.

10. Unctuous compositions as claimed in claim 1 or 2, wherein, described siccative is selected from by lead naphthenate, lead linoleate, lead resinate, cobalt naphthenate, cobaltous linoleate, cobalt resinate, manganese naphthenate, manganous linoleate, manganese resinate, iron naphthenate, linolic acid iron, iron resinate, zinc naphthenate, zinc linoleate, zinc resinate, synthetic fatty acid zirconium and the group formed thereof.

11. Unctuous compositions as claimed in claim 1 or 2, wherein, the iodine number of described unsaturated fatty acids oil is at least 130.

12. a method that is used to make wood furniture, described method comprises:

Any described Unctuous compositions among the claim 1-11 is coated on the wood substrate;

Adopt described Unctuous compositions described wood substrate to be carved as refrigerant.