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Solvent-free unfoamed polyurethane structured adhesive and preparation method thereof

A technology for structural adhesives and foamed polyurethane, applied in polyurea/polyurethane adhesives, adhesive additives, non-polymer adhesive additives, etc., can solve the problem of environmental pollution caused by two-component polyurethane structural adhesives Narrow adjustable range, short operating time, etc., to avoid foaming, improve reliability, and easy operation

Inactive Publication Date: 2017-02-22
YANTAI DARBOND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of existing two-component polyurethane structural adhesives such as polluting the environment, short operation time, narrow adjustable range, and easy foaming during curing, and provides a solvent-free and non-foaming two-component polyurethane Structural adhesive and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The A component consists of the following raw materials in parts by mass:

[0033] Castor oil: 20 parts;

[0034] AC-006: 25 copies;

[0035] Silica powder: 47 parts;

[0036] Molecular sieve: 6 parts;

[0037] Bis(2-ethylhexyl) phthalate: 2 parts;

[0038] Described B component is made up of the raw material of following mass parts:

[0039] Polymethylene polyphenylisocyanate PM200: 100 parts;

[0040] A method for preparing the polyurethane structural adhesive described in this embodiment comprises the following steps:

[0041] ①Preparation of component A: Take 20 parts of castor oil, 25 parts of AC-006, 47 parts of silicon micropowder, and 2 parts of bis(2-ethylhexyl) phthalate, and slowly pour them into a three-roll mill to grind and disperse evenly. Transfer the uniformly ground mixture into a mixing reactor, add 6 parts of molecular sieves into the mixing reactor, and vacuumize and stir for 60 minutes under a vacuum degree >0.9MPa to obtain component A;

[...

Embodiment 2

[0046] The A component consists of the following raw materials in parts by mass:

[0047] T400: 20 copies;

[0048] Castor Oil: 10

[0049] Calcium powder: 50 parts;

[0050] Molecular sieve: 6 parts;

[0051] Oxazolidine water remover: 2 parts;

[0052] Bis(2-ethylhexyl)phthalate: 4 parts;

[0053] Xylene formaldehyde resin: 3 parts;

[0054] Hydrophobic fumed silicon R8200: 4 parts;

[0055] 4,4-bis(sec-butylamino)-diphenylmethane: 1 part;

[0056] Described B component is made up of the raw material of following mass parts:

[0057] Polymethylene polyphenylisocyanate VK10L: 100 parts;

[0058] A method for preparing the polyurethane structural adhesive described in this embodiment comprises the following steps:

[0059] ①Preparation of component A: Take 10 parts of castor oil, 20 parts of T400, 50 parts of calcium powder, 4 parts of bis(2-ethylhexyl) phthalate and 3 parts of xylene formaldehyde resin and slowly pour them into a three-roll mill Grind and disperse e...

Embodiment 3

[0064] The A component consists of the following raw materials in parts by mass:

[0065] AC-006: 20 copies;

[0066] SOVERMOL860: 20 servings;

[0067] Silica powder: 47 parts;

[0068] Molecular sieve: 5 parts;

[0069] Oxazolidine water remover: 1 part;

[0070] Bis(2-ethylhexyl)phthalate: 3 parts;

[0071] Xylene formaldehyde resin: 3 parts;

[0072] Hydrophobic fumed silicon R202: 1 part;

[0073] Described B component is made up of the raw material of following mass parts:

[0074] Polymethylene polyphenylisocyanate Rubinate9016: 100 parts;

[0075] A method for preparing the polyurethane structural adhesive described in this embodiment comprises the following steps:

[0076] ①Preparation of component A: Take 20 parts of AC-006, 20 parts of SOVERMOL860, 47 parts of silicon micropowder, 3 parts of bis(2-ethylhexyl) phthalate and 3 parts of xylene formaldehyde resin and slowly pour into three-roll grinding Grind and disperse evenly in the machine, transfer the evenl...

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Abstract

The invention relates to a solvent-free unfoamed polyurethane structured adhesive which contains a component A and a component B, wherein the mass ratio of the component A to the component B is 4:1; the component A contains the following raw materials in parts by mass: 30-45 parts of polyol, 50-47 parts of packing, 8-6 parts of a water removing agent, 4-2 parts of phthalic acid bi(2-ethylhexyl) ester, 3-0 parts of xylene formaldehyde resin, 4-0 parts of lyophobic gaseous silicon and 1-0 parts of an amino curing agent; and the component B contains the following raw material in part by mass: 100 parts of polymethylene polyphenyl isocyanate. The solvent-free unfoamed polyurethane structured adhesive provided by the invention is small in moisture influence, and is barely affected by ambient humidity, a foaming phenomenon in the gluing curing process can be avoided, and later reliability can be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of polyurethane adhesives and preparation methods thereof, and in particular relates to a solvent-free and non-foaming polyurethane structural adhesive and a preparation method thereof. Background technique [0002] Polyurethane adhesive molecules contain a large number of polar groups, such as: highly active isocyanate groups (-NCO) and carbamate groups (-NHCOO-), so it can be compatible with most materials. Good bonding performance, so its market application is quite extensive: the use of similar adhesives in my country is increasing every year, but they are mainly solvent-based. With the development of society, human awareness of environmental protection is gradually improving, and environmentally friendly Solvent-free, gradually replacing solvent-based adhesives. Solvent-free adhesives have become a research hotspot due to their advantages of environmental protection, non-toxicity, economy, low odor, simpl...

Claims

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Application Information

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IPC IPC(8): C09J175/14C09J175/04C09J11/06C09J11/04C08G18/76C08G18/67
CPCC08G18/36C08G18/7664C08K3/26C08K3/36C08K5/12C08K7/26C08K2003/265C09J11/04C09J11/06C09J175/04C09J175/14
Inventor 刘志培王建斌陈田安牛青山
Owner YANTAI DARBOND TECH
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