Isocyanate (environment-friendly) binder for particleboards and preparation method of binder

A technology of isocyanate and diisocyanate, which is applied in the field of preparation of paper-making additives and isocyanate adhesives for particleboard, can solve the problems of poor water resistance, low bonding strength, and high price, and achieve simplified process, enhanced physical strength, and stability Good results

Inactive Publication Date: 2019-04-12
山东同创精细化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, simple isocyanate adhesives are expensive, poor in water resistance, and low in bonding strength.

Method used

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  • Isocyanate (environment-friendly) binder for particleboards and preparation method of binder
  • Isocyanate (environment-friendly) binder for particleboards and preparation method of binder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The invention provides a kind of preparation method of isocyanate (environmental protection type) adhesive for particleboard, and concrete steps comprise:

[0034] (1) In a nitrogen protective atmosphere, add 30 parts of toluene diisocyanate (TDI), 50 parts of sorbitol, and 5 parts of acrylic acid in the reactor, and slowly add 1 part of potassium persulfate dropwise at a rate of 1 mL / min. Fully stir for 5 hours, the stirring speed is 500rpm, and react at room temperature;

[0035] (2) Add 1 part of glycerin, 3 parts of corn starch, 3 parts of polyvinyl alcohol, 5 parts of soybean protein, 1 part of water-based thickener, 100 parts of water, 1000 rpm, and stir for 1 hour;

[0036] (3) After the reaction is finished, the isocyanate (environment-friendly) adhesive for particleboard can be obtained.

Embodiment 2

[0038] The invention provides a kind of preparation method of isocyanate (environmental protection type) adhesive for particleboard, and concrete steps comprise:

[0039] (1) In a nitrogen protective atmosphere, add 35 parts of isophorone diisocyanate (IPDI), 55 parts of pentaerythritol, and 8 parts of acrylic acid in the reactor, and slowly add 2 parts of tert-butyl hydroperoxide dropwise at the same time. 1.5mL / min, fully stirred for 6h, the stirring speed was 800rpm, and reacted at room temperature;

[0040] (2) Add 2 parts of 1,4-butanediol, 4 parts of corn starch, 4 parts of polyvinyl alcohol, 6 parts of soybean protein, 2 parts of water-based thickener, 150 parts of water, 2000 rpm, and stir for 2 hours;

[0041] (3) After the reaction is finished, the isocyanate (environment-friendly) adhesive for particleboard can be obtained.

Embodiment 3

[0043] The invention provides a kind of preparation method of isocyanate (environmental protection type) adhesive for particleboard, and concrete steps comprise:

[0044] (1) In a nitrogen protective atmosphere, add 40 parts of diphenylmethane diisocyanate (MDI), 60 parts of ethylene glycol, and 10 parts of acrylic acid in the reactor, and slowly add 3 parts of ammonium persulfate dropwise at a rate of 2mL / min, fully stirred for 7h, with a stirring speed of 1000rpm, and reacted at room temperature;

[0045] (2) Add 3 parts of trimethylolpropane, 5 parts of potato starch, 5 parts of polyvinyl alcohol, 7 parts of soybean protein, 3 parts of water-based thickener, 200 parts of water, 2000 rpm, and stir for 2 hours;

[0046] (3) After the reaction is finished, the isocyanate (environment-friendly) adhesive for particleboard can be obtained.

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PUM

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Abstract

The invention discloses an isocyanate (environment-friendly) binder for particleboards and a preparation method of the binder. The main components of the isocyanate (environment-friendly) binder for particleboards comprise 30 to 40 parts of isocyanate, 50 to 60 parts of polyol, 1 to 3 parts of initiator, 5 to 10 parts of acrylic acid, 1 to 3 parts of chain extender, 3 to 5 parts of starch, 3 to 5parts of polyvinyl alcohol, 5 to 7 parts of soybean protein, 1 to 3 parts of aqueous tackifier, and 100 to 200 parts of water. The preparation process of the isocyanate (environment-friendly) binder for particleboards of the invention is simple and mature, the production cost is low, the binder is friendly to environment, and the operation is easy to control.

Description

technical field [0001] The invention relates to an auxiliary agent for papermaking, in particular to the preparation of an isocyanate (environmental protection type) adhesive for particleboard, and belongs to the technical field of papermaking. Background technique [0002] At present, the adhesives used in the production of wood-based panels in my country are mainly urea-formaldehyde resin adhesives and a small amount of phenolic resin adhesives. Although some manufacturers use low-toxicity urea-formaldehyde resin adhesives, they still cannot completely solve the problem of free formaldehyde release. Isocyanate resin adhesive is a non-formaldehyde synthetic resin adhesive, and its application in the production of wood-based panels will completely solve the problem of formaldehyde release from wood-based panels. [0003] However, simple isocyanate adhesives are expensive, poor in water resistance, and low in bonding strength. Contents of the invention [0004] The main pu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/14C08G18/67C08G18/65C08G18/64C08G18/62C08G18/32
CPCC08G18/6212C08G18/6446C08G18/6484C08G18/6517C08G18/6755C09J175/14
Inventor 贾明远丁伟张丹
Owner 山东同创精细化工有限公司
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