Search

CN-121975337-A - Waterproof wax for artificial board and preparation method and application thereof

CN121975337ACN 121975337 ACN121975337 ACN 121975337ACN-121975337-A

Abstract

The invention relates to the technical field of chemical industry, in particular to waterproof wax for an artificial board, and a preparation method and application thereof. The waterproof wax for the artificial board comprises, by weight, 40-43% of paraffin wax, 0.8-1.9% of low molecular polymer, 0.4-1.9% of high molecular polymer, 0.2-0.9% of cross-linking agent, 4-6% of emulsifying agent and the balance of water, wherein the waterproof wax is a product obtained by homogenizing and dispersing a cross-linked product obtained by the paraffin wax, a specific low molecular polymer and the high molecular polymer under the action of the cross-linking agent in the presence of the emulsifying agent with an HLB value of 8-14. The waterproof wax has extremely high viscosity, can replace partial urea-formaldehyde resin while playing a role in water prevention, reduces the consumption of the urea-formaldehyde resin, and obviously enhances the mechanical strength and the water prevention effect of the finally obtained plate.

Inventors

  • WANG ZIDONG
  • LI FENGXUAN
  • LIANG YU
  • XIA ENDONG
  • LI RUIFENG
  • NI SHURONG
  • JIA YUNGANG
  • XU TIEGANG
  • WANG GANG
  • SUN FAMIN

Assignees

  • 中国石油天然气股份有限公司

Dates

Publication Date
20260505
Application Date
20241030

Claims (10)

  1. 1. The waterproof wax for the artificial board is characterized by comprising the following components in percentage by weight: 40-43% of paraffin; 0.8 to 1.9 percent of low molecular polymer; 0.4% -1.9% of high molecular polymer; 0.2% -0.9% of cross-linking agent; 4% -6% of an emulsifying agent; The balance being water; The paraffin is fully refined paraffin or semi-refined paraffin, the low molecular polymer is one or more of polyethylene wax, polypropylene wax, polybutadiene and polyvinyl chloride, the high molecular polymer is one or more of ethylene-vinyl acetate copolymer, hydroxyethyl cellulose, hydroxypropyl cellulose, cellulose acetate and polyethylene terephthalate, the cross-linking agent is one or more of dicumyl peroxide, benzoyl peroxide, di-tert-butyl peroxide and dicumyl peroxide, and the HLB value of the emulsifier is 8-14; the waterproof wax is a product obtained by further homogenizing and dispersing a crosslinked product obtained by paraffin, a low-molecular polymer and a high-molecular polymer under the action of a crosslinking agent in the presence of an emulsifying agent.
  2. 2. The waterproof wax for artificial boards according to claim 1, which comprises the following components in percentage by weight: 41-43% of paraffin; 1.4 to 1.9 percent of low molecular polymer; 0.8% -1.9% of high molecular polymer; 0.5% -0.9% of cross-linking agent; 4% -6% of an emulsifying agent; The balance being water; the HLB value of the emulsifier is 10-13.
  3. 3. The waterproof wax for artificial boards according to claim 1, which comprises the following components in percentage by weight: 42-43% of paraffin; 1.8 to 1.9 percent of low molecular polymer; 1.5 to 1.9 percent of high molecular polymer; 0.8-0.9% of cross-linking agent; 4-6% of emulsifying agent; The balance of deionized water; the HLB value of the emulsifier is 12.
  4. 4. A water-repellent wax for artificial boards according to any one of claims 1 to 3, wherein the weight average molecular weight of the low molecular polymer is 300 to 10000 and the weight average molecular weight of the high molecular polymer is 1 x 10 5 -3×10 5 .
  5. 5. A water-repellent wax for artificial boards according to any one of claims 1 to 3, wherein the paraffin wax is a semi-refined wax of No. 52, 54, 56, 58.
  6. 6. A waterproof wax for artificial boards according to any one of claims 1 to 3, wherein the low molecular polymer is one or a combination of two of polyethylene wax and polypropylene wax.
  7. 7. A water-repellent wax for artificial boards according to any one of claims 1 to 3, wherein the high molecular polymer is one or a combination of more of ethylene-vinyl acetate copolymer, cellulose acetate, and hydroxyethyl cellulose.
  8. 8. A water-repellent wax for artificial boards according to any one of claims 1 to 3, wherein the crosslinking agent is dicumyl peroxide.
  9. 9. The method for preparing the waterproof wax for the artificial board according to any one of claims 1 to 8, comprising the following preparation steps: Melting paraffin under inert gas atmosphere, adding low molecular polymer, high molecular polymer and crosslinking agent according to the proportion and components of any one of claims 1-8, performing crosslinking reaction, adding water and emulsifying agent after crosslinking reaction, and homogenizing and dispersing.
  10. 10. An artificial board, characterized in that it is prepared by using the waterproof wax as claimed in any one of claims 1 to 8 as a waterproofing agent and urea-formaldehyde resin as a binder.

Description

Waterproof wax for artificial board and preparation method and application thereof Technical Field The invention relates to the technical field of chemical industry, in particular to waterproof wax for an artificial board, and a preparation method and application thereof. Background In the processing process of artificial boards such as plywood, chipboard and fiberboard, wood shavings and fibers are combined by using an adhesive, so that the board has enough strength, and meanwhile, a proper amount of waterproof agent is added to ensure that the board has certain waterproof property. At present, emulsifying wax is commonly used as a waterproof additive in the production of artificial boards, and is used together with an adhesive for sizing. The urea-formaldehyde resin has the advantages of simple manufacture, convenient use, low cost and the like, becomes the main adhesive for artificial board production in China, and accounts for more than 90 percent of the adhesive used for the artificial board. However, the problem of formaldehyde emission during the manufacturing and use of urea-formaldehyde resins has become the biggest problem in the application of artificial boards. The existing method for reducing the formaldehyde emission in the artificial board mainly comprises the following steps of improving an adhesive, post-treating the artificial board and improving the artificial board production process. The post treatment of the artificial board and the improvement of the production process of the artificial board both lead to complex processing technology and obviously increase the cost, while the method for improving the adhesive can reduce the release amount of formaldehyde to a certain extent, but has extremely limited reduction effect, and can lead to complex preparation technology of the adhesive and increase the cost of the adhesive. Therefore, the waterproof wax for the artificial board with high viscosity is researched and developed, the strength of the board is improved through the high viscosity characteristic of the waterproof wax while the waterproof effect is achieved, and the waterproof wax has important significance for reducing the consumption of urea-formaldehyde resin in the board and reducing the formaldehyde release amount in the board. Disclosure of Invention The invention provides the waterproof wax for the artificial board, which has higher viscosity, can partially replace urea-formaldehyde resin, reduces the consumption of the urea-formaldehyde resin in the production of the board, and can obviously strengthen the mechanical strength and the waterproof effect of the finally obtained board. The invention also provides a preparation method of the waterproof wax for the artificial board, which has simple process, low cost and easy realization. The invention also provides an artificial board, which has the advantages of less consumption of urea resin as an adhesive and less formaldehyde release. The invention realizes the technical purposes through the following technical proposal: The waterproof wax for the artificial board comprises, by weight, 40-43% of paraffin wax, 0.8-1.9% of low molecular polymer, 0.4-1.9% of high molecular polymer, 0.2-0.9% of cross-linking agent, 4-6% of emulsifying agent and the balance of water, wherein the paraffin wax is fully refined paraffin wax or semi-refined paraffin wax, the low molecular polymer is one or more of polyethylene wax, polypropylene wax, polybutadiene and polyvinyl chloride, the high molecular polymer is one or more of ethylene-vinyl acetate copolymer, hydroxyethyl cellulose, hydroxypropyl cellulose, cellulose acetate and polyethylene terephthalate, the cross-linking agent is one or more of dicumyl peroxide, benzoyl peroxide, di-tert-butyl peroxide and dicumyl peroxide, and the HLB value of the emulsifying agent is 8-14; the waterproof wax is a product obtained by further homogenizing and dispersing a crosslinked product obtained by paraffin, a low-molecular polymer and a high-molecular polymer under the action of a crosslinking agent in the presence of an emulsifying agent. The waterproof wax for the artificial board comprises, by weight, 41-43% of paraffin wax, 1.4-1.9% of a low-molecular polymer, 0.8-1.9% of a high-molecular polymer, 0.5-0.9% of a cross-linking agent, 4-6% of an emulsifying agent and the balance of water, wherein the HLB value of the emulsifying agent is 10-13. The waterproof wax for the artificial board comprises, by weight, 42-43% of paraffin wax, 1.8-1.9% of a low-molecular polymer, 1.5-1.9% of a high-molecular polymer, 0.8-0.9% of a cross-linking agent, 4-6% of an emulsifying agent and the balance of deionized water, wherein the HLB value of the emulsifying agent is 12. The waterproof wax for the artificial board has the weight average molecular weight of 300-10000 for the low molecular polymer and 1 multiplied by 10 5-3×105 for the high molecular polymer. The waterproof wax for the artificial board is No. 52, no.