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Heterophase polyurethane composition with reduced foam formation

A composite, two-component polyurethane technology, applied in household appliances, other household appliances, coatings, etc., can solve the problems of damage to material properties, increased heat release, etc.

Active Publication Date: 2020-04-28
HENKEL KGAA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, they are often very reactive, which can lead to increased exotherm and compromise material performance

Method used

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  • Heterophase polyurethane composition with reduced foam formation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0087] raw material

[0088] 1. Polyol: polyether triol, hydroxyl value=550mg KOH / g, viscosity at 25°C=1800mPas (Brookfield25°C, rotor 4, 20rpm), OH equivalent weight=102g, number average molecular weight=300g / mol

[0089] 2. Polyisocyanate: isomeric mixture of MDI and higher functional homologues, NCO content 32% by weight, viscosity at 25° C. = 43 (Brookfield 25° C., spindle 3, 50 rpm)

[0090] 3. Catalyst: solution of dicyclic tertiary amine (DABCO) in polyol (based on solution, 30% by weight of DABCO)

[0091] 4. Emulsifier / release agent:

[0092] - emulsifier 1: difunctional carboxylic acid (C 6 ) and unsaturated fatty acid (average C chain length 18) esterified tetrafunctional polyol

[0093] - Emulsifier 2: Dipentaerythritol fully esterified with oleic acid

[0094] - Emulsifier 3: dimer fatty acid and branched alcohol (average alcohol chain length C 8 ) diester

[0095] - dimer fatty acid

[0096] —polyoxyethylene tridecyl ether phosphate

[0097] Component A: ...

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Abstract

The invention relates to a two-component polyurethane composition comprising at least one polyol, at least one polyisocyanate and at least one emulsifier which is not homogeneously miscible with the at least one polyol. The invention also relates to the use of the polyurethane composition as a binder for the production of fiber composites, to a process for the production of the fiber composite, to the fiber composite itself, and to the use of the fiber composite .

Description

technical field [0001] The present invention relates to a two-component polyurethane composition comprising at least one polyol, at least one polyisocyanate and at least one emulsifier, wherein said composition exhibits phase separation after curing. The invention also relates to the use of the polyurethane composition as a binder for the production of fiber composites, processes for the production of these fiber composites, the fiber composites themselves, and their use. Background technique [0002] Fiber reinforced composites are designed to withstand high mechanical stress. For this purpose, the matrix resin must be able to stably join the fiber material after curing. Defects have an adverse effect on the mechanical properties of molded parts. Therefore, air holes, cavities or air pockets in molded parts should be avoided. Furthermore, the cured matrix resin should be characterized by high fracture toughness. Suitable matrix materials based on epoxy adhesives are kno...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/48C08G18/76C08G18/20C08G18/42C08J5/04C08K5/10C08K5/103C08K5/49B29C70/48
CPCB29C70/48C08G18/2081C08G18/4233C08G18/4288C08G18/4829C08G18/7664C08J5/04C08K5/10C08K5/103C08K5/49C08G2150/50C08G2120/00B29L2031/3055B29K2875/00C08J2375/08C08G18/0871C08G18/7671
Inventor A·费伦茨O·拉默朔普A·尼格迈尔
Owner HENKEL KGAA