Solvent-free polyurethane adhesive and preparation method thereof

A polyurethane adhesive, solvent-free technology, applied in the direction of polyurea/polyurethane adhesive, adhesive, adhesive type, etc., can solve the problems of poor compatibility of resin raw materials, affecting the adhesive performance of the adhesive, affecting the transparency of the adhesive, etc. , to achieve the effects of increasing elongation at break and medium resistance, excellent weather resistance, and excellent hydrolysis resistance

Active Publication Date: 2021-02-09
上海都昱新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Solvent-based adhesives are widely used in the composite flexible packaging industry, but solvent-based adhesives have the disadvantages of volatile alcohol, strong odor, and certain toxicity when used, and the flexible packaging industry for food has strict requirements for adhesives, so the development of Solvent-free adhesives, solvent-free adhesives do not contain any solvents, so there is no problem of solvent residues, in order to increase the anti-medium performance of solvent

Method used

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  • Solvent-free polyurethane adhesive and preparation method thereof

Examples

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Comparison scheme
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Example Embodiment

[0068]Example 1

[0069]Example 1 of the present invention specifically provides a solvent-free polyurethane adhesive, which is composed of component A and component B; the raw materials of component A include, by weight, 40 parts of polyester polyol , 12 parts of vegetable oil, 5 parts of small molecule polyol; The raw materials of the B component include, by weight, 60 parts of isocyanate and 7 parts of glass powder;

[0070]The raw materials of the A component also include polyether polyol, and the weight ratio of the polyether polyol to the polyester polyol is 1:2;

[0071]The polyester polyol is an adipic acid polyester polyol;

[0072]The adipic acid polyester polyol is a mixture of polydiethylene adipate and polypentanediol adipate, and the polydiethylene adipate and polyhexyl The weight ratio of pentanediol diacid is 1:1.5;

[0073]The viscosity of the polyethylene adipate at 60°C is 4000 cps;

[0074]The vegetable oil includes epoxidized soybean oil;

[0075]The vegetable oil also includes rici...

Example Embodiment

[0085]Example 2

[0086]Example 2 of the present invention specifically provides a solvent-free polyurethane adhesive, which is composed of component A and component B; the raw materials of component A include, by weight, 50 parts of polyester polyol , 20 parts of vegetable oil, 8 parts of small molecule polyol; The raw materials of the B component include, by weight, 80 parts of isocyanate and 10 parts of glass powder;

[0087]The raw materials of the A component also include polyether polyol, and the weight ratio of the polyether polyol to the polyester polyol is 1:3;

[0088]The polyester polyol is an adipic acid polyester polyol;

[0089]The adipic acid polyester polyol is a mixture of polydiethylene adipate and polypentanediol adipate, and the polydiethylene adipate and polyhexyl The weight ratio of pentanediol diacid is 1:2;

[0090]The viscosity of the polyethylene adipate at 60°C is 6000 cps;

[0091]The vegetable oil includes epoxy soybean oil;

[0092]The vegetable oil also includes ricinoleic...

Example Embodiment

[0102]Example 3

[0103]Example 3 of the present invention specifically provides a solvent-free polyurethane adhesive, which is composed of component A and component B; the raw material of component A includes, by weight, 45 parts of polyester polyol , 18 parts of vegetable oil, 6 parts of small molecule polyol; The raw materials of the B component include, by weight, 70 parts of isocyanate and 8 parts of glass powder;

[0104]The raw materials of the A component also include polyether polyol, and the weight ratio of the polyether polyol to the polyester polyol is 1:2.5;

[0105]The polyester polyol is an adipic acid polyester polyol;

[0106]The adipic acid polyester polyol is a mixture of polydiethylene adipate and polypentanediol adipate, and the polydiethylene adipate and polyhexyl The weight ratio of pentanediol diacid is 1:1.8;

[0107]The viscosity of the polyethylene adipate at 60°C is 5000 cps;

[0108]The vegetable oil includes epoxy soybean oil;

[0109]The vegetable oil also includes ricinol...

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Abstract

The invention relates to the technical field of adhesives, in particular to a solvent-free polyurethane adhesive and a preparation method thereof. The adhesive is composed of a component A and a component B, wherein the component A is prepared from the following raw materials in parts by weight: 40-50 parts of polyester polyol, 12-20 parts of vegetable oil and 5-8 parts of micromolecular polyol; the component B is prepared from the following raw materials in parts by weight: 60-80 parts of isocyanate and 7-10 parts of glass powder. During use, the component A and the component B are uniformlymixed according to the weight ratio of 1:(1.2-1.5) for use. The solvent-free polyurethane adhesive disclosed by the invention does not contain any solvent, so that the residual problem of solvent pollution does not exist. The product belongs to a green and environment-friendly adhesive, and has good adhesive property, medium resistance and transparency.

Description

technical field [0001] The invention relates to the technical field of adhesives, in particular to a solvent-free polyurethane adhesive and a preparation method thereof. Background technique [0002] Solvent-based adhesives are widely used in the composite flexible packaging industry, but solvent-based adhesives have the disadvantages of volatile alcohol, strong odor, and certain toxicity when used, and the flexible packaging industry for food has strict requirements for adhesives, so the development of Solvent-free adhesives, solvent-free adhesives do not contain any solvents, so there is no problem of solvent residues, in order to increase the anti-medium performance of solvent-free adhesives, some inorganic fillers are often added to the filler, for example, silica, Calcium carbonate, etc., but the addition of these fillers will affect the transparency of the adhesive to a certain extent, and because the compatibility of these inorganic fillers with the resin raw material...

Claims

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Application Information

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IPC IPC(8): C09J175/14C09J11/04
CPCC09J175/14C09J11/04C08K3/40
Inventor 张人华贾玉波
Owner 上海都昱新材料科技有限公司
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