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Solvent-free urethane composition

A composition, solvent-free technology, applied in the direction of polyurea/polyurethane adhesives, polyurea/polyurethane coatings, adhesive types, etc., can solve the problems of high viscosity, coatability, low operability, etc. Excellent color properties, improved paintability and workability, and reduced viscosity

Active Publication Date: 2007-01-10
日本硅石株式会社
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this polyurethane coating composition is also high in viscosity, poor in applicability and workability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0078] The preparation method of the solvent-free composition of the present invention is not particularly limited, and it can be prepared by a usual method of mixing the components. In preparation of the composition, each component may be added at one time or may be added in any order. For example, instead of adding each component at one time, any one of the polyol component (A) and the polyisocyanate component (B) may be added before painting.

[0079] In addition, when the polymer polyol (A2) is added, the polyol (A) can be used separately to prepare the low-molecular polyol (A1) and the polymer polyol (A2), or it can be used in the low-molecular polyol (A1) In , a mixture of both is prepared and used by polymerizing monomers constituting the polymer polyol (A2). When the polymer polyol (A2) is commercially available as a solution containing an organic solvent, after adding a low-molecular polyol (A1) higher than the boiling point of the organic solvent to the organic solv...

Embodiment 1

[0256] 204 parts by weight of glycidyl ether C-2, 7 parts by weight of DBTDL (2% by weight solution), and 94 parts by weight of polyol A1-1 were added to a plastic beaker, and uniformly stirred with a stand mixer to prepare agent A. Add 2 parts by weight of polyisocyanate B-1702 as B agent to the A agent, and then stir uniformly to obtain the target composition. Table 1 shows the composition of this composition, and Table 2 shows the results of evaluating various properties.

Embodiment 2

[0258] 135 parts by weight of glycidyl ether C-2, 8 parts by weight of DBTDL (3% by weight solution), and 45 parts by weight of polyol A1-2 were added to a plastic beaker, and uniformly stirred with a table mixer to prepare agent A. Add 820 parts by weight of water-based polyisocyanate B-4 as agent B to the agent A, and stir evenly to obtain the target composition. Table 1 shows the composition of this composition, and Table 2 shows the results of evaluating various properties.

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PUM

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Abstract

A solvent-free composition is prepared, which is a composition comprising a polyol component (A) and a polyisocyanate component (B), wherein the polyol component (A) is composed of a low-molecular-weight polyol (A1) with a molecular weight of 350 or less. The viscosity of the aforementioned low-molecular polyol (A1) may be 500 mPa·s or less at 25°C. The aforementioned low-molecular polyol (A1) may be, for example, C2-6 alkylene glycol or the like. In addition, the polyol component (A) may be composed of a low-molecular polyol (A1) and a polymer polyol (A2) as a diluent. The aforementioned polyisocyanate component (B) may be a modified product or a derivative of polyisocyanate (for example, a multimer of diisocyanate, etc.). The aforementioned solvent-free composition may further contain an epoxy group-containing compound (aliphatic diol glycidyl ether, aliphatic polyhydric alcohol glycidyl ether having a hydroxyl group, etc.) (C) that may have a hydroxyl group. Such a solvent-free composition has a small load on the environment, has excellent coating film properties, and has high application efficiency.

Description

technical field [0001] The present invention relates to a solvent-free polyurethane composition having a small environmental load and excellent coating film properties and applicability, and its use. technical background [0002] Polyurethane-based resins are widely used as coating compositions or paints for buildings, building components, various vehicles, mechanical instruments, plastic products, fiber products, etc. due to their high abrasion resistance, chemical resistance, and flexibility. On the other hand, in recent years, in the field of coatings, regulations on VOC (volatile organic compound) emissions into the atmosphere have become stricter, and polyurethane coatings are also expected to replace conventional solvent-based coatings. Water-based paints, powder paints, etc. have been developed as paints to replace solvent-based paints. However, water-based paints contain emulsifiers and dispersants to hydrophilize the resin, so the water resistance of the coating fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/32C08G18/65C09D175/04C09J175/04C08K5/1515C08G18/30C08L75/04C09D163/00
Inventor 泉美佐夫
Owner 日本硅石株式会社
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