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Flexible polyurethane material

A polyurethane and polyester technology, applied in the field of flexible polyurethane materials, can solve the problems of degradation, yellowing, unsuitability, etc.

Inactive Publication Date: 2001-06-27
3M CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, they degrade and yellow when left in the sun
As a result, existing polyurethane compositions and methods of making them often result in undesirable end properties or are not suitable for use as exterior finishes

Method used

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  • Flexible polyurethane material
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] The polyester polyol / diol-based first component was prepared as follows: 31.9 g Formrez-55-225, 30 g Formrez-55-112, and 30 g Tone-301 were mixed together in a round bottom flask and heated to 70°C. The mixture was stirred and degassed under vacuum (approximately less than 30 inches of mercury) for 4 hours until no bubbles escaped. The temperature of the mixture was cooled to about 50°C and 0.06 g T-12, 0.2 g Silwet L-7607, 1.5 g Uvinul N-539, and 1 g Tinuvin-292 were added to the mixture. The mixture was stirred for 15 minutes. The formula (weight percentage) of the first reaction component is listed in Table 2.

[0069] The second reaction component includes 100 g of polyisocyanate (Desmodur XP-7100). The first and second reaction components were mixed together in a volume ratio of 1:1 and poured on the 11 substrates. The polyurethane was cured in a convection oven at 52°C for 10 hours. The cured polyurethane has no outgassing phenomenon on all substrates, and has excelle...

Embodiment 2-6

[0075] The first component used in Examples 2-6 was prepared in the same manner as in Example 1. The composition of the first component of each example is listed in Table 1.

[0076] The second component used in Example 2 was prepared by reacting 30g Pluracol-538 and 70g Vestanat IPDI at 80°C for 4 hours. The second component formed includes a mixture of polyisocyanate with primary and secondary isocyanate groups and monomer Vestanat IPDI. The second component used in Example 3 was the same as that used in Comparative Example 1. The second component used in Example 3 includes a mixture of secondary polyisocyanate and the monomer Desmodur W. The second component used in Example 4 was prepared by mixing 70 g of polyisocyanate and 30 g of Desmodur H. The second component used in Example 5 was prepared by mixing 50 g of polyisocyanate and 50 g of Desmodur H.

[0077] The first and second components were mixed together in a volume ratio of 1:1 to prepare polyurethane and poured on the ...

Embodiment 13-18

[0082] The first component used in Examples 13-17 was prepared in the same manner as in Example 1. Different components are used to illustrate the effect of different polyether content on cured polyurethane. The components and contents used are listed in Table 5. In addition, Example 18 includes a black pigment added to the first reaction component.

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Abstract

The present invention provides a flexible two component polyurethane and method for producing the polyurethane. The cured polyurethane is flexible, durable and weather resistant. The polyurethane is suitable for use as a protective layer on various substrates.The flexible polyurethane is the reaction product of solvent-free reaction components. The first component includes one or more polyols, optionally, one or more diols, and a catalyst. The second component includes a primary aliphatic isocyanate crosslinker.

Description

Field of invention [0001] The present invention relates to a flexible polyurethane material, more specifically, to a solvent-free two-component polyurethane, in particular to a transparent polyurethane with improved flexibility, durability and weather resistance. The present invention also includes products using the polyurethane as the top coat and a method for manufacturing the polyurethane top coat. Background of the invention [0002] Decorative products usually use a polyurethane top coat to cover and protect the substrate and the markings or decoration features on the substrate. Such decorative products include various substrates on which graphics are printed or show outlines of graphics. Polyurethane materials are generally transparent or optically transparent and are used as lenses to display the substrate or various marks on the substrate. Decoration products have various uses in interior or exterior decoration. For example, the model name of a car is usually displayed o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/40B29C41/22B32B7/12C08G18/40C08G18/42C09D175/04C09D175/06
CPCB32B7/12C09D175/06C08G18/4202Y10T428/31551C09D175/04C08G18/32B32B27/40B05C17/00553B05C17/015B65D83/0055
Inventor C·T·何C·小富勒布赖特
Owner 3M CO
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