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Silanol-based bicomponent waterborne polyurethane wood adhesive and preparation method thereof

A technology of water-based polyurethane and wood adhesives, which is applied in polyurea/polyurethane adhesives, unsaturated alcohol copolymer adhesives, adhesives, etc., can solve problems affecting the health of users in the environment, and achieve improvement and prolongation of the board-making process. Effect of pot life, enhanced wet bond strength and resistance to water, weathering and aging

Active Publication Date: 2017-12-08
桂林新美环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] There are many types of existing wood adhesives, but urea-formaldehyde resin glue and phenolic resin glue are mainly used in production. Since the main raw material of this type of glue is formaldehyde, it will continue to flow for a long period of time during production and use. Release free formaldehyde, affecting the environment and the health of users

Method used

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  • Silanol-based bicomponent waterborne polyurethane wood adhesive and preparation method thereof
  • Silanol-based bicomponent waterborne polyurethane wood adhesive and preparation method thereof
  • Silanol-based bicomponent waterborne polyurethane wood adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] 1. Adhesive formula:

[0068] The main agent is made of the following components by weight ratio:

[0069] 9 parts of polyvinyl alcohol;

[0070] 11 parts of compound polyol (made by mixing soybean oil polyol, polyether polyol and dibutyl phthalate in a weight ratio of 10:1:40);

[0071] 15 parts of silica sol;

[0072] 0.4 parts of propylene glycol;

[0073] 0.05 part of polyacrylamide;

[0074] 65 parts of water;

[0075] 0.05 part of surfactant (sodium dodecylbenzenesulfonate);

[0076] 0.08 part of defoamer (n-butanol);

[0077] Preservative (isothiazolinone) 0 parts;

[0078] 15 parts of filler (calcium carbonate);

[0079] The crosslinking agent is made of the following components in weight ratio:

[0080] 7 parts castor oil;

[0081] 28 parts of polyol benzoate;

[0082] 65 parts of isocyanate (polyphenyl polymethylene polyisocyanate (polymeric MDI)).

[0083] The weight ratio of main agent and crosslinking agent is 100:10.

[0084] 2. Preparation me...

Embodiment 2

[0094] 1. Adhesive formula:

[0095] The main agent is made of the following components by weight ratio:

[0096] 10 parts of polyvinyl alcohol;

[0097] 10 parts of complex polyols (made from 14 parts of soybean oil polyols, 4 parts of polyether polyols, and 50 parts of dioctyl phthalate);

[0098] 25 parts of silica sol;

[0099] 0.35 parts of propylene glycol;

[0100] 0.06 part of polyacrylamide;

[0101] 55 parts of water;

[0102] Surfactant (sodium dodecylbenzenesulfonate) 0.08 part;

[0103] 0.10 part of defoamer (tributyl phosphate);

[0104] 0.05 part of antiseptic (isothiazolinone);

[0105] Filler (talcum powder) 8 parts;

[0106] The crosslinking agent is made of the following components in weight ratio:

[0107] 5 parts castor oil;

[0108] 20 parts of polyol benzoate;

[0109] 75 parts of isocyanate (polyphenyl polymethylene polyisocyanate (polymeric MDI)).

[0110] The weight ratio of main agent and crosslinking agent is 100:6.

[0111] 2. Preparat...

Embodiment 3

[0120] 1. Adhesive formula:

[0121] The main agent is made of the following components by weight ratio:

[0122] 15 parts of polyvinyl alcohol;

[0123] 9 parts of composite polyol (obtained by mixing 15 parts of soybean oil polyol, 2 parts of polyether polyol, 30 parts of dibutyl phthalate and 30 parts of dioctyl phthalate respectively by weight);

[0124] 18 parts of silica sol;

[0125] 0.3 parts of propylene glycol;

[0126] 0.04 parts of polyacrylamide;

[0127] 60 parts of water;

[0128] 0.2 part of surfactant (sodium dodecylbenzenesulfonate);

[0129] 0 parts of defoamer (n-butanol);

[0130] 0.08 part of antiseptic (isothiazolinone);

[0131] 12 parts of filler (composed of kaolin and talc in a weight ratio of 2:1);

[0132] The crosslinking agent is made of the following components in weight ratio:

[0133] Vegetable oil (castor oil) 6 parts;

[0134] 30 parts of polyol benzoate;

[0135]72 parts of isocyanate (diphenylmethane diisocyanate (pure MDI)).

...

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Abstract

The invention discloses a silanol-based bicomponent waterborne polyurethane wood adhesive and a preparation method thereof. The adhesive mainly comprises a main agent and a cross-linking agent, wherein the main agent is mainly prepared from the following components in parts by weight: 9 to 15 parts of polyving akohol, 6 to 12 pars of pluronic polyols, 15 to 25 parts of silica sol, 0.2 to 0.4 part of propylene glycol, 0.03 to 0.06 part of polyacrylamide, 50 to 65 parts of water, 0.05 to 0.2 part of a surfactant, 0 to 0.15 part of a defoamer, 0 to 0.2 part of a preservative, and 8 to 15 parts of a filler; the pluronic polyol is formed by mixing soybean oil polyol, polyether polyol, and dibutyl phthalate or dioctyl phthalate according to the weight ratio of (6-15):(1-4):(30-60); the cross-linking agent is prepared from the following components in parts by weight: 5 to 8 parts of vegetable oil, 20 to 30 parts of polyol benzoate, and 65 to 75 parts of isocyanate. The isocyanate is high in adhesive strength, good in water weather resistance and weather resistance and environmentally friendly.

Description

technical field [0001] The invention relates to a wood adhesive, in particular to a silanol-based two-component waterborne polyurethane wood adhesive and a preparation method thereof. Background technique [0002] There are many types of existing wood adhesives, but urea-formaldehyde resin glue and phenolic resin glue are mainly used in production. Since the main raw material of this type of glue is formaldehyde, it will continue to flow for a long period of time during production and use. Release free formaldehyde, affecting the environment and the health of users. [0003] With the enhancement of people's awareness of environmental protection, the environmental protection requirements for adhesives are also getting higher and higher. The development of a wood adhesive suitable for plywood production process requirements, high adhesive strength, good water and weather resistance, and environmental protection has become the focus of research. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C09J129/04C09J1/00C09J11/04C09J11/06
CPCC08L2205/03C09J1/00C09J11/04C09J11/06C09J175/04C08L29/04C08L33/26C08K13/02C08K3/36C08K5/42C08K5/47C08K2003/265C08K5/12
Inventor 王钱生
Owner 桂林新美环保科技有限公司
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