CN113021549A - Bamboo wear-resistant treatment method - Google Patents
Bamboo wear-resistant treatment method Download PDFInfo
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- CN113021549A CN113021549A CN202110256375.4A CN202110256375A CN113021549A CN 113021549 A CN113021549 A CN 113021549A CN 202110256375 A CN202110256375 A CN 202110256375A CN 113021549 A CN113021549 A CN 113021549A
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- bamboo
- wear
- resistant
- treatment method
- diisocyanate
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K9/00—Chemical or physical treatment of reed, straw, or similar material
- B27K9/002—Cane, bamboo
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/02—Processes; Apparatus
- B27K3/08—Impregnating by pressure, e.g. vacuum impregnation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/02—Processes; Apparatus
- B27K3/12—Impregnating by coating the surface of the wood with an impregnating paste
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/34—Organic impregnating agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/34—Organic impregnating agents
- B27K3/50—Mixtures of different organic impregnating agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/001—Heating
Abstract
The invention discloses a bamboo wear-resistant treatment method, and belongs to the technical field of bamboo surface modification treatment. The bamboo wear-resistant treatment method comprises the steps of firstly carrying out vacuum pressurization impregnation treatment on bamboo by using a mixed dispersion liquid of polyol, polyether-ether-ketone and diisocyanate, then carrying out spraying treatment on the bamboo by using an organotin dispersion liquid, and finally carrying out step heating treatment on the bamboo. The bamboo wear-resistant treatment method provided by the invention not only can obviously improve the wear resistance and wear-resistant stability of the bamboo, but also can improve the hardness and dimensional stability of the bamboo, and has obvious economic value and social benefit.
Description
Technical Field
The invention belongs to the technical field of bamboo wear-resistant treatment, and particularly relates to a bamboo wear-resistant treatment method.
Background
With the development of economy in China, the timber harvesting amount cannot meet the needs of people, China is a country with the least forest storage amount in the world, but the area of the bamboo forest and the yield of the bamboo forest are located at the top of the world. The bamboo is a natural resource, has the characteristics of natural degradation, reproducibility, good environmental harmony and the like, and along with the development of the society and the improvement of environmental awareness, people aim at the natural and harmless bamboo products again. Bamboo wood has the advantages of being capable of regrowing, short in growth cycle, high in strength-to-weight ratio, strong in machinability and the like, and is widely applied to building materials, transportation materials, engineering materials and the like. But the bamboo wood has the defects of poor wear resistance, unstable size and the like. In order to make the bamboo material meet the use requirements better, the bamboo material needs to be modified. At present, the bamboo is subjected to wear-resistant treatment mainly through surface coating, but the wear-resistant performance of the bamboo is not changed from the inside, and the wear-resistant performance of the bamboo is greatly reduced along with the time migration.
Disclosure of Invention
The invention provides a wear-resistant treatment method for bamboo wood, aiming at the problems of non-wear resistance, poor dimensional stability and the like of the bamboo wood. The wear-resistant treatment method provided by the invention not only can obviously improve the wear resistance and wear-resistant stability of the bamboo, but also can improve the hardness and dimensional stability of the bamboo, and has obvious economic value and social benefit.
In order to achieve the purpose, the invention adopts the following technical scheme:
a wear-resistant treatment method for bamboo includes vacuum pressure impregnation of bamboo with the mixed dispersion of polyol, polyether-ether-ketone and diisocyanate, spraying the bamboo with the dispersion of organic tin, and heating the bamboo step by step.
The wear-resistant treatment method of the bamboo wood specifically comprises the following steps:
(1) adding 2-15 g of polyol into 1000-2000 mL of ethyl acetate, mechanically stirring for 30-60 min at room temperature, adding 10-60 g of polyether-ether-ketone, mechanically stirring for 30-60 min at room temperature, then carrying out ultrasonic treatment for 2-4 h, finally adding 1-10 g of diisocyanate, and mechanically stirring for 30-60 min at room temperature to obtain a mixed dispersion liquid of the polyol, the polyether-ether-ketone and the diisocyanate;
(2) placing the dried bamboo sample in an automatic vacuum pressurization tank, vacuumizing until the vacuum degree is 0.01-0.03 MPa, maintaining the pressure for 30-90 min, injecting the mixed dispersion liquid, pressurizing to 2-4 MPa, maintaining the pressure for 1-3 h, releasing the pressure, continuously impregnating for 1-3 h under normal pressure, taking out the bamboo sample, removing surface residual liquid, and performing vacuum drying for 24h at room temperature to obtain a pretreated bamboo sample;
(3) uniformly spraying the pretreated bamboo sample with 0.5-2 wt% of organic tin dispersion liquid, wherein the spraying pressure is 0.2-0.4 MPa, the spraying time is 2-6 s, standing the sprayed bamboo sample at room temperature for 4-8 h, and carrying out step heating treatment to obtain the wear-resistant bamboo sample, namely the finished product.
The polyhydric alcohol is any one of pentaerythritol, ethylene glycol, 1, 4-butanediol, glycerol and trimethylolethane.
The polyether-ether-ketone is powdery solid particles, and the average particle size is 2-10 mu m.
The diisocyanate is any one of toluene diisocyanate, isophorone diisocyanate and diphenylmethane diisocyanate.
The organic tin is any one of dibutyltin oxide, dibutyltin dibutyrate, dibutyltin dilaurate, dibutyltin diacetate and stannous octoate.
The organic tin dispersant is ethyl acetate.
The step heating treatment is divided into two stages of first-order temperature rise and second-order temperature rise, wherein the first-order temperature rise stage is heating to 70-90 ℃, and heat preservation is carried out for 1-3 hours, and the second-order temperature rise stage is heating to 90-110 ℃, and heat preservation is carried out for 30-60 minutes.
The invention has the following remarkable advantages:
(1) the invention adopts a chemical method to prepare polyurethane with excellent wear resistance, and compounds polyether-ether-ketone with high wear resistance and polyurethane and carries out stepped heating treatment, thereby effectively improving the wear resistance, dimensional stability and hardness of bamboo wood. Meanwhile, in the chemical reaction process, the diisocyanate monomer can react with hydroxyl on the bamboo fiber, so that the bonding strength of the polyether-ether-ketone and polyurethane composite material and the bamboo is improved, the loss of polyether-ether-ketone is effectively prevented, and the wear-resistant stability of the bamboo is improved.
(2) The wear-resistant treatment method provided by the invention can obviously improve the wear resistance and wear-resistant stability of the bamboo wood, and can improve the dimensional stability and hardness of the bamboo wood, the total dry shrinkage rate of the bamboo wood before treatment is 8.1%, the hardness is 2.9kN, the wear rates before and after a loss experiment are respectively 2.3% and 6.6%, the total dry shrinkage rate of the bamboo wood after treatment is 0.9-1.6%, the hardness is 3.1-3.6 kN, and the wear rates before and after the loss experiment are respectively 0.20-0.36% and 0.29-0.51%, so that the wear-resistant treatment method has obvious economic value and social benefit.
Detailed Description
The advantages and effects of the method for abrasion resistance treatment of bamboo in this embodiment will be further illustrated by several groups of examples and comparative examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
(1) Adding 2g of pentaerythritol into 1000mL of ethyl acetate, mechanically stirring for 30min at room temperature, then adding 10g of polyether-ether-ketone with the average particle size of 2 mu m, mechanically stirring for 30min at room temperature, then carrying out ultrasonic treatment for 2h, finally adding 1g of toluene diisocyanate, and mechanically stirring for 30min at room temperature to prepare a mixed dispersion liquid of pentaerythritol, polyether-ether-ketone and toluene diisocyanate;
(2) placing the dried bamboo sample in an automatic vacuum pressurization tank, vacuumizing to the vacuum degree of 0.01MPa, maintaining the pressure for 30min, injecting the mixed dispersion liquid, pressurizing to 2MPa, maintaining the pressure for 3h, releasing the pressure, continuously impregnating for 1h at normal pressure, taking out the bamboo sample, removing surface residual liquid, and performing vacuum drying for 24h at room temperature to obtain a pretreated bamboo sample;
(3) uniformly spraying the pretreated bamboo sample with 0.5 wt% of dibutyltin oxide dispersion liquid, wherein the spraying pressure is 0.2MPa, the spraying time is 6s, standing the sprayed bamboo sample at room temperature for 8h, and carrying out step heating treatment to obtain the wear-resistant bamboo sample, namely the finished product.
The dispersant of the dibutyltin oxide is ethyl acetate.
The step heating treatment is divided into two stages of first-order temperature rise and second-order temperature rise, wherein the first-order temperature rise stage is heating to 70 ℃ and heat preservation is carried out for 3 hours, and the second-order temperature rise stage is heating to 90 ℃ and heat preservation is carried out for 60 minutes.
Example 2
(1) Adding 8g of 1, 4-butanediol into 1500mL of ethyl acetate, mechanically stirring for 45min at room temperature, adding 30g of polyether-ether-ketone with the average particle size of 5 mu m, mechanically stirring for 40min at room temperature, then carrying out ultrasonic treatment for 3h, finally adding 5g of isophorone diisocyanate, and mechanically stirring for 45min at room temperature to obtain a mixed dispersion liquid of 1, 4-butanediol, polyether-ether-ketone and isophorone diisocyanate;
(2) placing the dried bamboo sample in an automatic vacuum pressurization tank, vacuumizing to the vacuum degree of 0.02MPa, maintaining the pressure for 60min, injecting the mixed dispersion liquid, pressurizing to 3MPa, maintaining the pressure for 2h, releasing the pressure, continuously impregnating for 2h under normal pressure, taking out the bamboo sample, removing surface residual liquid, and performing vacuum drying for 24h at room temperature to obtain a pretreated bamboo sample;
(3) uniformly spraying a pretreated bamboo sample by using 1% by weight of dibutyltin dilaurate dispersion liquid, wherein the spraying pressure is 0.3MPa, the spraying time is 4s, standing the sprayed bamboo sample at room temperature for 6h, and carrying out step heating treatment to obtain the wear-resistant treated bamboo sample, namely a finished product.
The dispersant of the dibutyltin dilaurate is ethyl acetate.
The step heating treatment is divided into two stages of first-order temperature rise and second-order temperature rise, wherein the first-order temperature rise stage is heating to 80 ℃ and preserving heat for 2 hours, and the second-order temperature rise stage is heating to 100 ℃ and preserving heat for 45 minutes.
Example 3
(1) Adding 15g of trimethylolethane into 2000mL of ethyl acetate, mechanically stirring for 60min at room temperature, then adding 60g of polyether-ether-ketone with the average particle size of 10 mu m, mechanically stirring for 60min at room temperature, then carrying out ultrasonic treatment for 4h, finally adding 10g of diphenylmethane diisocyanate, and mechanically stirring for 60min at room temperature to prepare a mixed dispersion liquid of the trimethylolethane, the polyether-ether-ketone and the diphenylmethane diisocyanate;
(2) placing the dried bamboo sample in an automatic vacuum pressurization tank, vacuumizing to the vacuum degree of 0.03MPa, maintaining the pressure for 90min, injecting the mixed dispersion liquid, pressurizing to 4MPa, maintaining the pressure for 1h, releasing the pressure, continuously impregnating for 3h at normal pressure, taking out the bamboo sample, removing surface residual liquid, and performing vacuum drying for 24h at room temperature to obtain a pretreated bamboo sample;
(3) uniformly spraying the pretreated bamboo sample with stannous octoate dispersion liquid with the weight percentage of 2%, wherein the spraying pressure is 0.4MPa, the spraying time is 2s, standing the sprayed bamboo sample at room temperature for 4h, and then carrying out step heating treatment to obtain the wear-resistant bamboo sample, namely the finished product.
The dispersant of the stannous octoate is ethyl acetate.
The step heating treatment is divided into two stages of first-order temperature rise and second-order temperature rise, wherein the first-order temperature rise stage is heating to 90 ℃ and preserving heat for 1h, and the second-order temperature rise stage is heating to 110 ℃ and preserving heat for 30 min.
Comparative example 1
(1) Adding 8g of 1, 4-butanediol into 1500mL of ethyl acetate, mechanically stirring for 45min at room temperature, adding 5g of isophorone diisocyanate, and mechanically stirring for 45min at room temperature to obtain a mixed solution of 1, 4-butanediol and isophorone diisocyanate;
(2) placing the dried bamboo sample in an automatic vacuum pressurization tank, vacuumizing to the vacuum degree of 0.02MPa, maintaining the pressure for 60min, injecting the mixed solution, pressurizing to 3MPa, maintaining the pressure for 2h, releasing the pressure, continuously impregnating for 2h under normal pressure, taking out the bamboo sample, removing surface residual liquid, and performing vacuum drying for 24h at room temperature to obtain a pretreated bamboo sample;
(3) uniformly spraying a pretreated bamboo sample by using 1% by weight of dibutyltin dilaurate dispersion liquid, wherein the spraying pressure is 0.3MPa, the spraying time is 4s, standing the sprayed bamboo sample at room temperature for 6h, and carrying out step heating treatment to obtain the wear-resistant treated bamboo sample.
The dispersant of the dibutyltin dilaurate is ethyl acetate.
The step heating treatment is divided into two stages of first-order temperature rise and second-order temperature rise, wherein the first-order temperature rise stage is heating to 80 ℃ and preserving heat for 2 hours, and the second-order temperature rise stage is heating to 100 ℃ and preserving heat for 45 minutes.
Comparative example 2
(1) Adding 30g of polyether-ether-ketone with the average particle size of 5 mu m into 1500mL of ethyl acetate, mechanically stirring for 40min at room temperature, and then carrying out ultrasonic treatment for 3h to prepare a polyether-ether-ketone dispersion liquid;
(2) placing the dried bamboo sample in an automatic vacuum pressurization tank, vacuumizing to the vacuum degree of 0.02MPa, maintaining the pressure for 60min, injecting the dispersion liquid, pressurizing to 3MPa, maintaining the pressure for 2h, releasing the pressure, continuously impregnating for 2h under normal pressure, taking out the bamboo sample, removing surface residual liquid, and performing vacuum drying for 24h at room temperature to obtain a pretreated bamboo sample;
(3) uniformly spraying a pretreated bamboo sample by using 1% by weight of dibutyltin dilaurate dispersion liquid, wherein the spraying pressure is 0.3MPa, the spraying time is 4s, standing the sprayed bamboo sample at room temperature for 6h, and carrying out step heating treatment to obtain the wear-resistant treated bamboo sample.
The dispersant of the dibutyltin dilaurate is ethyl acetate.
The step heating treatment is divided into two stages of first-order temperature rise and second-order temperature rise, wherein the first-order temperature rise stage is heating to 80 ℃ and preserving heat for 2 hours, and the second-order temperature rise stage is heating to 100 ℃ and preserving heat for 45 minutes.
The wear-resistant treated bamboo materials prepared in the three groups of examples and the two groups of comparative examples are subjected to a wear resistance test according to a document (Zhangyuhong; performance research of glue-infiltrated densified bamboo materials by a dipping fumigation method, Zhengzhou: Henan university, 2018), a loss test according to a document (Rivularia canadensis, Caojinzhen; influence of alcohol compounds on loss resistance of boron-based wood preservatives, university of Beijing, 2009, (s1):6-10), a hardness test according to GB/T1941-.
Table 1 results of performance testing
According to the test results of the embodiment and the comparative example, the polyurethane with excellent wear resistance is prepared by a chemical method, and the high-wear-resistance polyether-ether-ketone and the polyurethane are compounded and subjected to step heating treatment, so that the wear resistance, the dimensional stability and the hardness of the bamboo material can be improved, the loss of polyether-ether-ketone can be effectively prevented, and the wear resistance stability of the bamboo material can be improved.
While the foregoing description shows and describes the preferred embodiments of the present invention, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as described herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. A bamboo wear-resistant treatment method is characterized by comprising the following steps: firstly, carrying out vacuum pressurization impregnation treatment on bamboo wood by using a mixed dispersion liquid of polyol, polyether-ether-ketone and diisocyanate, then carrying out spraying treatment on the bamboo wood by using an organic tin dispersion liquid, and finally carrying out step heating treatment on the bamboo wood; the method specifically comprises the following steps:
(1) adding 2-15 g of polyol into 1000-2000 mL of ethyl acetate, mechanically stirring for 30-60 min at room temperature, adding 10-60 g of polyether-ether-ketone, mechanically stirring for 30-60 min at room temperature, then carrying out ultrasonic treatment for 2-4 h, finally adding 1-10 g of diisocyanate, and mechanically stirring for 30-60 min at room temperature to obtain a mixed dispersion liquid of the polyol, the polyether-ether-ketone and the diisocyanate;
(2) placing the dried bamboo sample in an automatic vacuum pressurization tank, vacuumizing until the vacuum degree is 0.01-0.03 MPa, maintaining the pressure for 30-90 min, injecting the mixed dispersion liquid, pressurizing to 2-4 MPa, maintaining the pressure for 1-3 h, releasing the pressure, continuously impregnating for 1-3 h under normal pressure, taking out the bamboo sample, removing surface residual liquid, and performing vacuum drying for 24h at room temperature to obtain a pretreated bamboo sample;
(3) uniformly spraying the pretreated bamboo sample with 0.5-2 wt% of organic tin dispersion liquid, wherein the spraying pressure is 0.2-0.4 MPa, the spraying time is 2-6 s, standing the sprayed bamboo sample at room temperature for 4-8 h, and carrying out step heating treatment to obtain the wear-resistant bamboo sample, namely the finished product.
2. The bamboo wear-resistant treatment method according to claim 1, characterized in that: the polyhydric alcohol is any one of pentaerythritol, ethylene glycol, 1, 4-butanediol, glycerol and trimethylolethane.
3. The bamboo wear-resistant treatment method according to claim 1, characterized in that: the polyether-ether-ketone is powdery solid particles, and the average particle size is 2-10 mu m.
4. The bamboo wear-resistant treatment method according to claim 1, characterized in that: the diisocyanate is any one of toluene diisocyanate, isophorone diisocyanate and diphenylmethane diisocyanate.
5. The bamboo wear-resistant treatment method according to claim 1, characterized in that: the organic tin is any one of dibutyltin oxide, dibutyltin dibutyrate, dibutyltin dilaurate, dibutyltin diacetate and stannous octoate.
6. The bamboo wear-resistant treatment method according to claim 1, characterized in that: the organic tin dispersant is ethyl acetate.
7. The bamboo wear-resistant treatment method according to claim 1, characterized in that: the step heating treatment is divided into two stages of first-order temperature rise and second-order temperature rise, wherein the first-order temperature rise stage is heating to 70-90 ℃, and heat preservation is carried out for 1-3 hours, and the second-order temperature rise stage is heating to 90-110 ℃, and heat preservation is carried out for 30-60 minutes.
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| CN202110256375.4A CN113021549A (en) | 2021-03-09 | 2021-03-09 | Bamboo wear-resistant treatment method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1944009A (en) * | 2006-10-16 | 2007-04-11 | 东北林业大学 | Method for modifying wood using foamed isocyanate resin |
| CN103586947A (en) * | 2013-11-11 | 2014-02-19 | 中南林业科技大学 | Method of in-situ self-assembly in solid wood to prepare polyurethane reinforced wood |
| CN109337567A (en) * | 2018-09-27 | 2019-02-15 | 合众（佛山）化工有限公司 | A kind of polyether-ether-ketone modified polyurethane water-repellent preservation wear-resistant paint |
-
2021
- 2021-03-09 CN CN202110256375.4A patent/CN113021549A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1944009A (en) * | 2006-10-16 | 2007-04-11 | 东北林业大学 | Method for modifying wood using foamed isocyanate resin |
| CN103586947A (en) * | 2013-11-11 | 2014-02-19 | 中南林业科技大学 | Method of in-situ self-assembly in solid wood to prepare polyurethane reinforced wood |
| CN109337567A (en) * | 2018-09-27 | 2019-02-15 | 合众（佛山）化工有限公司 | A kind of polyether-ether-ketone modified polyurethane water-repellent preservation wear-resistant paint |
Non-Patent Citations (1)
| Title |
|---|
| （日）布村昭夫等: "《木材虫害与防治》", 31 July 1982, 第80-81页 * |
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Application publication date: 20210625 |