A high-performance wood wax oil and its preparation method

Abstract

This invention discloses a method for preparing high-performance wood wax oil, belonging to the field of coating technology. The raw materials used in this wood wax oil are soybean oleic acid, maleic anhydride, grafting catalyst, glycerol, phthalic anhydride, esterification catalyst, vanadium drier, zirconium drier, carnauba wax, and beeswax. Compared to wood wax oils based on tung oil and linseed oil, the wood wax oil of this invention uses soybean oleic acid as the main material, utilizing maleic anhydride to perform graft copolymerization at the α-position of the carbon-carbon double bond in soybean oleic acid, thereby increasing the iodine value of the resin system. Increased iodine value leads to increased crosslinking points, thus ensuring drying properties and improving the hardness, drying performance, and yellowing resistance of the wood wax oil; weather resistance is significantly improved, and drying time is accelerated; no heavy metal driers such as cobalt and manganese are added, making it environmentally friendly; the preparation process of the wood wax oil of this invention is simple and easy to operate, with low material costs.

Description

Technical Field

[0001] This invention belongs to the field of coating technology, specifically a high-performance wood wax oil and its preparation method. Background Technology

[0002] Wood wax oil, also known as plant-based oil wax coating, is a natural wood coating similar to but distinct from paint. Its main raw materials are natural plant extracts such as tung oil, linseed oil, perilla oil, pine oil, palm wax, and plant resins. Therefore, it does not contain harmful chemicals such as phenol, formaldehyde, polycyclic aromatic hydrocarbons, or heavy metals. Wood wax oil is primarily used for oiling, waxing, polishing, and repairing the surfaces of various types of wood (including softwood and hardwood) in wooden furniture and home decoration. After applying wood wax oil, it not only penetrates deep into the wood for deep conditioning but also forms a protective layer on the surface, making the wood more wear-resistant and extending its lifespan, without harming the health of those applying it.

[0003] According to existing literature, patent CN 106700865 A discloses a quick-drying wood wax oil and its preparation method. The wood wax oil is composed of alkyd resin, plant wax and other materials. The coating made from it has the advantages of rapid drying, moderate viscosity, good stability, good wetting and penetration, and good resistance to yellowing. The preparation method adopts a step-by-step fusion method based on the properties of the raw materials to fully and uniformly fuse them. The fusion temperature is low and the time is short, which saves energy and time and reduces the preparation cost.

[0004] Patent CN 103834181 B discloses an environmentally friendly and durable wood wax oil and its preparation method. The wood wax oil is composed of vegetable oil, bio-wax, dammar resin and emulsified silicone oil. The vegetable oil is a mixture of tung oil and turpentine. The product has good durability, low temperature resistance, fire resistance, is not easy to peel, has good wear resistance and good gloss, and can be widely used for coating and protection of wood products.

[0005] Patent CN 107033784 A discloses a natural and environmentally friendly plant-based wood wax oil. This wood wax oil is composed of raw materials such as polymerized linseed oil, tung oil, alkyd resin, Brazilian orange oil, and Brazilian carnauba wax. The plant-based wood wax oil provided by this invention not only uses pure natural and pollution-free raw materials, making it green and environmentally friendly, but also has low cost, is economical and practical, and is conducive to widespread promotion and use.

[0006] Patent CN 105542659 A discloses a method for preparing wood wax oil. In this method, tung oil seeds and maple pulp are placed together and steamed and pressed, then mixed with substances such as octadecanoic acid, and the mixture is subjected to ultrasonic vibration, filtration and distillation to obtain wood wax oil. The wood wax oil prepared by this invention is suitable for the preparation of outdoor wood products, and has weather resistance and wear resistance, and is not easy to crack.

[0007] Patent CN 105950009 B discloses a wood wax oil and its preparation method. The wood wax oil is composed of vegetable oil, vegetable wax, blending agent, drier, modifier, etc., wherein the vegetable oil is a mixture of linseed oil, castor oil, peanut oil and flaxseed oil. The wood wax oil prepared by this invention has excellent weather resistance and no obvious discoloration or deformation in ultraviolet, high temperature and high humidity environments. Its water resistance, acid and alkali resistance and other properties are all superior to similar products and are comparable to the performance of traditional polyurethane paint.

[0008] Based on the existing literature, it can be found that most wood wax oils currently on the market are made from tung oil and linseed oil, which have poor resistance to yellowing and require a long drying time, generally more than 24 hours. Summary of the Invention

[0009] This invention addresses the shortcomings of existing wood wax oil products, such as poor resistance to yellowing and long drying time, by providing a high-performance wood wax oil and its preparation method. This wood wax oil not only has excellent resistance to yellowing but also a shorter drying time, and also has advantages such as high hardness and strong weather resistance.

[0010] To achieve the above objectives, the present invention adopts the following technical solution.

[0011] A high-performance wood wax oil is composed of the following raw materials in parts by weight: 40-60 parts soybean oil, 4-12 parts maleic anhydride, 0.1-1 parts grafting catalyst, 3-15 parts glycerol, 1-18 parts phthalic anhydride, 0.1-1 parts esterification catalyst, 0.1-2 parts vanadium drier, 0.1-2 parts zirconium drier, 0.6-1.5 parts carnauba wax, and 2-7 parts beeswax.

[0012] Preferably, the high-performance wood wax oil is composed of the following raw materials in parts by weight: 40-55 parts soybean oil, 4-10 parts maleic anhydride, 0.1-0.8 parts grafting catalyst, 3-12 parts glycerol, 1-16 parts phthalic anhydride, 0.1-0.8 parts esterification catalyst, 0.1-1.5 parts vanadium drier, 0.1-1.5 parts zirconium drier, 0.6-1 parts carnauba wax, and 2-6 parts beeswax.

[0013] Preferably, the grafting catalyst is an alkali metal compound.

[0014] Preferably, the esterification catalyst is an acid metal catalyst.

[0015] This invention also provides a method for preparing the above-mentioned high-performance wood wax oil, comprising the following steps:

[0016] (1) Add soybean oil acid, maleic anhydride and grafted catalyst to the reaction vessel, stir and heat to 200℃, and maintain the reaction for 2h;

[0017] (2) Cool down to 160℃, add glycerol, phthalic anhydride and esterification catalyst, then heat up to 200℃ and keep until the acid value is less than 10mgKOH / g;

[0018] (3) Cool down to 80℃ and filter, with the filtration fineness controlled below 20μm, and pump the filtrate into the paint mixing tank;

[0019] (4) Add vanadium drying agent, zirconium drying agent, carnauba wax and beeswax to the paint mixing tank in sequence, and stir at 600-700 r / min for 20 min;

[0020] (5) Filtration, with the filtration fineness controlled below 20μm, packaging, to obtain wood wax oil.

[0021] The beneficial technical effects of this invention are as follows: Compared with tung oil and linseed oil-based wood wax oils, the wood wax oil of this invention uses soybean oil as the main material and utilizes maleic anhydride to perform graft copolymerization at the α-position of the carbon-carbon double bond of soybean oil, thereby increasing the iodine value of the resin system. Increased iodine value leads to increased crosslinking points, thus ensuring drying properties and improving the hardness, drying ability, and resistance to yellowing of the wood wax oil; weather resistance is significantly improved, and drying time is accelerated; no heavy metal drying agents such as cobalt and manganese are added, making it green and environmentally friendly; the preparation process of the wood wax oil of this invention is simple and easy to operate, and the material cost is low. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Example 1

[0023] Add 48 kg of soybean oleic acid, 4 kg of maleic anhydride, and 1 kg of potassium carbonate to a reaction vessel, stir, and heat to 200°C, maintaining the reaction for 2 hours. Cool to 160°C, add 5 kg of glycerol, 7 kg of phthalic anhydride, and 0.5 kg of cerium phosphotungstate, then heat to 200°C again, maintaining the reaction until the acid value reaches 6.6 mg KOH / g. Cool to 80°C and filter to a fineness of 10 μm. Transfer the filtrate to a paint mixing tank. Add 1 kg of vanadium drier, 1 kg of zirconium drier, 1 kg of carnauba wax, and 3 kg of beeswax to the paint mixing tank in sequence, stirring at 600 r / min for 20 min. Filter to a fineness of 10 μm, package, and obtain wood wax oil. Example 2

[0024] Add 55 kg of soybean oleic acid, 8 kg of maleic anhydride, and 0.5 kg of potassium fluoride to a reaction vessel, stir, and heat to 200°C, maintaining the reaction for 2 hours. Cool down to 160°C, add 9 kg of glycerol, 6 kg of phthalic anhydride, and 0.8 kg of nickel phosphotungstenate, then heat to 200°C again, maintaining the reaction until the acid value reaches 6 mg KOH / g. Cool down to 80°C and filter, controlling the filtration fineness to below 20 μm. Pour the filtrate into a paint mixing tank. Add 0.9 kg of vanadium drier, 1.5 kg of zirconium drier, 1 kg of carnauba wax, and 7 kg of beeswax to the paint mixing tank in sequence, stirring at 700 r / min for 20 min. Filter and package to obtain wood wax oil. Example 3

[0025] Add 48 kg of soybean oleic acid, 10 kg of maleic anhydride, and 1 kg of lithium carbonate to a reaction vessel, stir, and heat to 200°C, maintaining the reaction for 2 hours. Cool down to 160°C, add 12 kg of glycerol, 6 kg of phthalic anhydride, and 1 kg of lithium molybdate, then heat to 200°C again, maintaining the reaction until the acid value reaches 7.2 mg KOH / g. Cool down to 80°C and filter, controlling the filtration fineness to below 20 μm. Pour the filtrate into a paint mixing tank. Add 2 kg of vanadium drier, 2 kg of zirconium drier, 1.5 kg of carnauba wax, and 7 kg of beeswax to the paint mixing tank in sequence, stirring at 650 r / min for 20 min. Filter and package to obtain wood wax oil. Example 4

[0026] Add 60 kg of soybean oleic acid, 10 kg of maleic anhydride, and 0.8 kg of sodium fluoride to a reaction vessel, stir, and heat to 200°C, maintaining the reaction for 2 hours. Cool to 160°C, add 14 kg of glycerol, 15 kg of phthalic anhydride, and 0.6 kg of nickel molybdate, then heat to 200°C again, maintaining the reaction until the acid value reaches 6.3 mg KOH / g. Cool to 80°C and filter, controlling the filtration fineness to below 20 μm. Pour the filtrate into a paint mixing tank. Add 1.4 kg of vanadium drier, 1.6 kg of zirconium drier, 1.2 kg of carnauba wax, and 3 kg of beeswax to the paint mixing tank in sequence, stirring at 600 r / min for 20 min. Filter and package to obtain wood wax oil.

[0027] Experimental Example

[0028] The performance of commercially available wood wax oil and the wood wax oil prepared according to the present invention were tested according to the following standard methods. The detailed results are shown in the table below.

[0029] Experimental results show that the wood wax oil prepared by this invention has better resistance to yellowing, shorter drying time, and also has advantages such as strong stain resistance and no bubbles during application.

[0030] The above description represents a preferred embodiment of the present invention and is not intended to limit the invention. Those skilled in the art can make various improvements and modifications without departing from the principles of the invention, and these improvements and modifications should also be included within the scope of protection of the present invention.

Claims

1. A high-performance wood wax oil, characterized in that, It is composed of the following raw materials in parts by weight: soybean oil 40-60 parts, maleic anhydride 4-12 parts, grafting catalyst 0.1-1 parts, glycerol 3-15 parts, phthalic anhydride 1-18 parts, esterification catalyst 0.1-1 parts, vanadium drying agent 0.1-2 parts, zirconium drying agent 0.1-2 parts, carnauba wax 0.6-1.5 parts, and beeswax 2-7 parts; The grafting catalyst is an alkali metal compound; The esterification catalyst is an acid metal catalyst. The preparation steps of the high-performance wood wax oil are as follows: (1) Add soybean oil acid, maleic anhydride and grafted catalyst to the reaction vessel, stir and heat to 200℃, and maintain the reaction for 2h; (2) Cool down to 160℃, add glycerol, phthalic anhydride and esterification catalyst, then heat up to 200℃ and keep until the acid value is less than 10mgKOH / g; (3) Cool down to 80℃ and filter, with the filtration fineness controlled below 20μm, and pump the filtrate into the paint mixing tank; (4) Add vanadium drying agent, zirconium drying agent, carnauba wax and beeswax to the paint mixing tank in sequence, and stir at 600-700 r / min for 20 min; (5) Filtration, with the filtration fineness controlled below 20μm, packaging, to obtain wood wax oil.

2. The high-performance wood wax oil according to claim 1, characterized in that, It is composed of the following raw materials in parts by weight: 40-55 parts soybean oil acid, 4-10 parts maleic anhydride, 0.1-0.8 parts grafting catalyst, 3-12 parts glycerol, 1-16 parts phthalic anhydride, 0.1-0.8 parts esterification catalyst, 0.1-1.5 parts vanadium drying agent, 0.1-1.5 parts zirconium drying agent, 0.6-1 part carnauba wax, and 2-6 parts beeswax.