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Solvent-free urethane composition

A composition and solvent-free technology, applied in the direction of polyurea/polyurethane adhesive, polyurea/polyurethane coating, adhesive type, etc., can solve the problems of coating property, low operability, high viscosity, etc., and achieve improved finishing Excellent performance and workability, excellent color development, and excellent chemical resistance

Active Publication Date: 2010-06-23
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 conventional method of mixing the components. In the preparation of the composition, each component may be added at once or in any order. For example, instead of adding each component at once, any one of the polyol component (A) and the polyisocyanate component (B) may be added before coating.

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

Embodiment 1

[0256] In a plastic beaker, 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, and they were uniformly stirred using a bench mixer to prepare agent A. Add polyisocyanate B-1702 parts by weight as agent B to the agent A, and then uniformly stir to obtain the desired composition. For this composition, the composition is shown in Table 1, and the results of evaluating various properties are shown in Table 2.

Embodiment 2

[0258] In a plastic beaker, 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, and they were uniformly stirred using a bench mixer to prepare agent A. Add 820 parts by weight of the aqueous polyisocyanate B-4 as the B agent to the A agent, and then uniformly stir to obtain the desired composition. For this composition, the composition is shown in Table 1, and the results of evaluating various properties are shown in Table 2.

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PUM

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Abstract

Disclosed is a solvent-free composition containing a polyol component (A) and a polyisocyanate component (B) wherein the polyol component (A) is composed of a low molecular weight polyol (A1) having a molecular weight of not more than 350. The viscosity of the low molecular weight polyol (A1) may be 500 mPa.s or less at 25 1 / 2 C, and the low molecular weight polyol (A1) may be, for example, a C2-6 alkylene glycol. Alternatively, the polyol component (A) may be composed of the low molecular weight polyol (A1) as a diluent and a polymer polyol (A2). The polyisocyanate component (B) may be a modified body or derivative of a polyisocyanate (such as a polymer of a diisocyanate). The solvent-free composition may further contain an epoxidized compound (C) which may optionally contain a hydroxyl group (such as an aliphatic diol glycidyl ether or an aliphatic polyol glycidyl ether having a hydroxyl group). This solvent-free composition causes only small damage to the environment, and has excellent coating properties and a high working efficiency.

Description

Technical field [0001] The present invention relates to a solvent-free polyurethane-based composition that has a small load on the environment and is excellent in the physical properties and workability of a coating film, and uses thereof. technical background [0002] Polyurethane resins have high wear resistance, chemical resistance, flexibility, etc., so they are widely used as coating compositions or coatings for structures, building components, various vehicles, machinery and meters, plastic products, and fiber products. On the other hand, in the paint field in recent years, regulations on the emission of VOC (volatile organic compounds) into the atmosphere have become strict, and it is also desired to replace conventional solvent-based paints with polyurethane paints. As paints that replace solvent-based paints, water-based paints and powder paints have been developed. However, since the water-based paint contains an emulsifier and a dispersant to make the resin hydrophili...

Claims

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Application Information

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Patent Type & Authority Patents(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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