Radiation-hardening coating compositions

• US 6,753,394 B2
• Filed: 09/04/2002
• Issued: 06/22/2004
• Est. Priority Date: 09/06/2001
• Status: Expired due to Term

• Current Assignee: Allnex Netherlands B.V. (Allnex (Luxembourg) & Cy SCA)
• Original Assignee: Bayer AG
• Inventors: Fäcke, Thomas, Weikard, Jan, Fischer, Wolfgang, Müller, Manfred, Witossek, Herbert
• Primary Examiner(s): Gorr, Rachel
• Application Number:
  US10/234,555
• Publication Number:
  US 20030050390A1
• Time in Patent Office: 657 Days
• Field of Search: 526/301, 522/90, 428/423.1
• US Class Current: 526/301
• CPC Class Codes: C08F 290/067 Polyurethanes; Polyureas
• CPC Class Codes: C08F 299/065 from polyurethanes with side or terminal unsaturations
• CPC Class Codes: C08G 18/68 Unsaturated polyesters
• CPC Class Codes: C09D 175/16 having terminal carbon-to-carbon unsaturated bonds
• CPC Class Codes: Y10T 428/31551 Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]

Abstract

The invention relates to new, low viscosity radiation-hardenable urethane acrylates prepared from oxalkylated polyols with 25 to 75 mole % of a polyol having a degree of oxalkylation between 3 and 5 and 75 to 25 mole % of a polyol having a degree of oxalkylation between 8 and 25, the resulting coatings having improved abrasion resistance, as well as their use as coating compositions, in particular for flooring materials.

Claims

1. A urethane acrylate prepared from a diisocyanate and/or polyisocyanate and a hydroxyfunctional partial ester wherein the ester is the reaction product of acrylic acid and/or methacrylic acid with a mixture of oxalkylated polyols containing three or more hydroxyl groups, wherein the mixture of the oxalkylated polyols comprises 25 to 75 mole % of a polyol having a degree of oxalkylation between 3 and 5 and 75 to 25 mole % of a polyol having a degree of oxalkylation between 8 and 25.

2. The urethane acrylate of claim 1 which is free from hydroxy-C_1-4-alkyl acrylates and methacrylates.

3. The urethane acrylate of claim 1 wherein the mixture of the oxalkylated polyols comprises 30 to 45 mole % of polyol having a degree of oxalkylation between 3 and 5 and 70 to 55 mole % of polyol having a degree of oxalkylation between 8 and 15.

4. The urethane acrylate of claim 1 wherein the diisocyanate and/or polyisocyanate comprises a mixture of aliphatic and aromatic diisocyanates and/or polyisocyanates.

6. A material coated with a coating comprising the urethane acrylate of claim 1.

7. The material of claim 6 comprising paper, cardboard, leather, textile, glass, metal or a plastic material.

8. The material of claim 6 comprising wooden flooring, PVC flooring and parquet flooring made of wood and plastic material.

5. A process for making a low viscosity, radiation-hardenable urethane acrylate comprising in a first stage partially esterifying a mixture of oxalkylated polyols with acrylic acid and/or methacrylic acid and in a second stage reacting the resulting product with a diisocyanate and/or a polyisocyanate, wherein the mixture of the oxalkylated polyols comprises 25 to 75 mole % of a polyol having a degree of oxalkylation between 3 and 5 and 75 to 25 mole % of a polyol having a degree of oxalkylation between 8 and 25.