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Phenol-dialdehyde starch-formaldehyde resin adhesive and preparation method thereof

A dialdehyde starch, formaldehyde resin technology, applied in the direction of adhesives, aldehyde/ketone condensation polymer adhesives, adhesive types, etc., can solve the problems of restrictions and high prices of resorcinol, achieve low cost and reduce dependence Excellent effect of resistance and water resistance

Active Publication Date: 2016-06-08
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent application publication number is the patent application of CN104877610A, discloses a kind of resorcinol-dialdehyde starch-formaldehyde polycondensation resin adhesive and preparation method thereof, but this kind of adhesive resorcinol price is higher, make it limited in practical applications

Method used

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  • Phenol-dialdehyde starch-formaldehyde resin adhesive and preparation method thereof
  • Phenol-dialdehyde starch-formaldehyde resin adhesive and preparation method thereof

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Embodiment 1

[0030] A kind of phenol-dialdehyde starch-formaldehyde resin adhesive of the present invention comprises the raw material of following components: 94.11Kg phenol, 81.2Kg mass concentration is the formaldehyde solution of 37%, 16Kg dialdehyde starch (aldehyde content>80%) ), 24Kg water and 5Kg polyvinyl alcohol 1788.

[0031] The preparation method of the phenol-dialdehyde starch-formaldehyde resin adhesive of the present embodiment may further comprise the steps:

[0032] (1) 94.11Kg of fused phenol is added to the reactor, and the pH is adjusted to 11 with a 10% sodium hydroxide aqueous solution with a mass concentration;

[0033] (2) dissolving 16Kg of dialdehyde starch in 24Kg of water to make starch milk with a mass concentration of 40%, adding it to the reactor, raising the reaction temperature to 60°C, and reacting at this temperature for 2h;

[0034] (3) Cool the mixture after step (2) to 40°C, add 56.8Kg of formaldehyde solution, raise the temperature to 80°C at a uni...

Embodiment 2

[0039] A kind of phenol-dialdehyde starch-formaldehyde resin adhesive of the present invention comprises the raw material of following components: 94.11Kg phenol, 121.74Kg mass concentration is the formaldehyde solution of 37%, 50Kg dialdehyde starch (aldehyde content>80%) ), 200Kg water and 10Kg polyvinyl alcohol 1799.

[0040] The preparation method of the phenol-dialdehyde starch-formaldehyde resin adhesive of the present embodiment may further comprise the steps:

[0041] (1) 94.11Kg of fused phenol is added in the reactor, and the pH is adjusted to 9 with a 20% aqueous sodium hydroxide solution with a mass concentration;

[0042] (2) dissolving 50Kg of dialdehyde starch in 200Kg of water to make starch milk with a mass concentration of 20%, adding it to the reactor, raising the reaction temperature to 80°C, and reacting at this temperature for 3h;

[0043] (3) Cool the mixture after step (2) to 40°C, add 85.22Kg of formaldehyde solution, raise the temperature to 82°C at ...

Embodiment 3

[0048] A kind of phenol-dialdehyde starch-formaldehyde resin adhesive of the present invention comprises the raw material of following components: 94.11Kg phenol, 146.1Kg concentration is the formaldehyde solution of 37%, 100Kg dialdehyde starch (aldehyde group content>80%) , 566.7Kg water and 20Kg polyvinyl alcohol 1788.

[0049] The preparation method of the phenol-dialdehyde starch-formaldehyde resin adhesive of the present embodiment may further comprise the steps:

[0050] (1) 94.11Kg of molten phenol is added to the reactor, and the pH is adjusted to 10 with 30% aqueous sodium hydroxide solution;

[0051] (2) Dissolving 100Kg of dialdehyde starch in 566.7Kg of water to make starch milk with a mass concentration of 15%, adding it to the reaction kettle, raising the reaction temperature to 84°C, and reacting at this temperature for 5h;

[0052] (3) Cool the mixture after step (2) to 40°C, add 102.3Kg of formaldehyde solution, raise the temperature to 84°C at a uniform spe...

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Abstract

The invention discloses a phenol-dialdehyde starch-formaldehyde resin adhesive. The adhesive comprises, by weight, 94.11 parts of phenol, 81.2-146.1 parts of formaldehyde solution, 8-100 parts of dialdehyde starch, 12-566.7 parts of water and 5-20 parts of polyvinyl alcohol. The dialdehyde starch which is a renewable degradable biomass resource is adopted to replace part of formaldehyde, and dependence, on petroleum resources, of a phenolic resin adhesive can be lowered; compared with an existing resorcinol-dialdehyde starch-formaldehyde resin adhesive, production cost is lowered remarkably; the phenol-dialdehyde starch-formaldehyde resin adhesive is high in adhesiveness, excellent in waterproofness, capable of meeting binding requirements of wood and bamboo and equivalent to the resorcinol-dialdehyde starch-formaldehyde resin adhesive in binding performance, so that performance-cost ratio is increased obviously, and the phenol-dialdehyde starch-formaldehyde resin adhesive can replace conventional phenolic resin adhesive and the existing resorcinol-dialdehyde starch-formaldehyde resin adhesive for use.

Description

technical field [0001] The invention relates to the field of wood adhesives, in particular to a phenol-dialdehyde starch-formaldehyde resin adhesive and a preparation method thereof. Background technique [0002] Phenolic resin adhesives have good bonding performance, excellent weather resistance, boiling water resistance and chemical corrosion resistance, and are widely used in the production of outdoor-grade wood-based panels and recombined bamboo. However, phenol and formaldehyde, the raw materials for the synthesis of phenolic resin adhesives, are derived from petroleum resources with limited reserves. With the increasing shortage of petroleum resources and the rising price of petroleum-based chemical raw materials, the large-scale production and application of phenolic resin adhesives increasingly restricted. In order to reduce the dependence on petroleum resources, the use of abundant and renewable biomass resources instead of petrochemical resources to prepare adhesi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J161/14C08G8/28C08G8/12C08G8/04
CPCC08G8/04C08G8/12C08G8/28C09J161/14
Inventor 左迎峰吴义强李萍刘文杰肖俊华赵星
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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