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Urethane-forming composition

A technology of urethane and composition, applied in the direction of polyurea/polyurethane adhesive, polyurea/polyurethane coating, adhesive type, etc., can solve the problem of low tensile breaking strength and polyurethane tensile elongation at break Small and other problems, to achieve the effect of high tensile breaking strength, high productivity, excellent pot life and coating property

Active Publication Date: 2020-10-02
TOSOH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this case, the polyurethane does not increase its molecular weight in a straight chain but becomes a cross-linked body having a dense cross-linked structure, so the obtained polyurethane has a low tensile elongation at break and a low tensile break strength.

Method used

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  • Urethane-forming composition

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0200] In the preparation of the urethane-forming composition (H), there are no particular limitations as long as it is a method capable of uniformly dispersing the prepolymer and raw materials contained in the urethane-forming composition (H). , the method of stirring using various conventionally known stirring methods can be mentioned. Examples of the agitator include a general-purpose agitator, an autorotation-revolution mixer, a dispersion disperser, a dissolver, a kneader, a mixer, a Labo Plastomill, and a planetary mixer. When both the urethane prepolymer (F) and the isocyanate compound (G) are in a liquid state at the temperature of stirring, a general-purpose mixer, a self-rotating mixer, a dispersion disperser, and a dissolver can be used appropriately.

[0201] The viscosity at 25° C. of the urethane-forming composition (H) is not particularly limited, but is usually not less than 100 mPa·s and not more than 100000 mPa·s, preferably not less than 200 mPa·s and not mo...

Embodiment 1

[0315] Example 1 is the following urethane-forming composition (E1): 80 parts by weight of polyalkylene oxide (A2), 20 parts by weight of polyalkylene oxide (B1), and 3 parts by weight of polyalkylene oxide (C1) , and an isocyanate compound (D1) and 0.005 parts by weight of dioctyltin dilaurate (DOTDL) as a urethanization catalyst, the amount of hydroxyl groups derived from (A2), (B1) and (C1) (M OH ) and the amount of isocyanate groups derived from (D1) (M NCO ) is M of (D1) in molar ratio NCO / M of (A2), (B1) and (C1) OH = 1.05. Table 3 shows the results of Example 1. The urethane-forming composition (E1) has good coatability and curability, and the coating film appearance of polyurethane (J1) obtained from this composition (E1) is good. High tensile breaking strength.

Embodiment 2

[0317] Example 2 is the following urethane-forming composition (E2): 90 parts by weight of polyalkylene oxide (A3), 10 parts by weight of polyalkylene oxide (B1), 5 parts by weight of polyalkylene oxide (C3) parts, and isocyanate compound (D1) and 0.005 parts by weight of DOTDL as a urethanization catalyst, the amount of hydroxyl groups derived from (A3), (B1) and (C3) (M OH ) and the amount of isocyanate groups derived from (D1) (M NCO ) is M of (D1) NCO / M of (A3), (B1) and (C3) OH = 1.05. The results of Example 2 are shown in Table 3. The urethane-forming composition (E2) has good coatability and curability, and the coating film appearance of polyurethane (J2) obtained from this composition (E2) is good. High tensile breaking strength.

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Abstract

The present invention provides a urethane-forming composition. A composition comprising a polyalkylene oxide having an alkylene oxide residue having 3 or more carbon atoms and an isocyanate compound has excellent coatability and high productivity accompanying a reaction (curing), and a polyurethane having high tensile breaking strength can be obtained. A urethane-forming composition (E) comprising: a polyalkylene oxide (A) having an alkylene oxide residue having 3 or more carbon atoms and two or more hydroxyl groups in one molecule; a polyalkylene oxide (B) having an aromatic amine residue andtwo or more hydroxyl groups; a polyalkylene oxide (C) containing one hydroxyl group and ethylene oxide residue in one molecule; and an isocyanate compound (D) having an average number of functional groups in the isocyanate group of 2.0 or more, an unsaturation of 0.010 meq / g or less in the polyalkylene oxide (A), and a number average molecular weight of 800 or more.

Description

technical field [0001] The present disclosure relates to carbamate-forming compositions. Background technique [0002] A polyalkylene oxide containing a large amount of by-produced monoalcohol (hereinafter, referred to as unsaturated monoalcohol) having an unsaturated group at one end is used as a raw material of polyurethane. However, when attempting to obtain polyurethane using this polyalkylene oxide, curing (curing) accompanying the reaction with the isocyanate compound takes time, which impairs productivity. [0003] Furthermore, such a polyurethane obtained from a polyalkylene oxide containing a large amount of unsaturated monoalcohol is difficult to have a high molecular weight, has a low tensile elongation at break, and has a low tensile break strength. On the other hand, a polyalkylene oxide containing a large amount of unsaturated monoalcohol reacts with an isocyanate compound having a large average number of isocyanate functional groups to obtain a high-molecular...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/58C08G18/50C08G18/48C08L75/08C08J5/18C09D175/08C09J175/08
CPCC08G18/58C08G18/5027C08G18/482C08G18/4045C08J5/18C08L75/08C09D175/08C09J175/08C08J2375/08C08G18/4808C08G18/10C08G18/22
Inventor 铃木茉由加大浜俊生清水义久大谷泰步
Owner TOSOH CORP