Coating composition containing UV-curable urethane (meth)acrylates containing isocyanate groups and urethane (meth)acrylates containing hydroxyl groups

• US 6,500,876 B2
• Filed: 03/16/2001
• Issued: 12/31/2002
• Est. Priority Date: 03/31/2000
• Status: Expired due to Term

• Current Assignee: Bayer Materialscience AG (Covestro AG)
• Original Assignee: Bayer AG
• Inventors: Weikard, Jan, Mundstock, Holger, Sonntag, Michael
• Primary Examiner(s): Berman, Susan W.
• Application Number:
  US09/811,032
• Publication Number:
  US 20010038917A1
• Time in Patent Office: 655 Days
• Field of Search: 522/92, 522/93, 522/96, 522/97, 522/98, 522/174, 528/59, 528/60, 528/65, 528/66
• US Class Current: 522/92
• CPC Class Codes: C08G 18/672 Esters of acrylic or alkyl acrylic acid having only one group containing active hydrogen
• CPC Class Codes: C08G 18/8175 with esters of acrylic or alkylacrylic acid having only one group containing active hydrogen
• 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 coating compositions containing:

a) urethane (meth)acrylates that contain (meth)acryloyl groups and free isocyanate groups,

b) urethane (meth)acrylates that contain (meth)acryloyl groups and free hydroxyl groups,

c) the UV initiators that initiate radical polymerization and

d) optionally, one or more compounds that react with isocyanates.

Claims

1. A coating composition comprising:

a) urethane (meth)acrylates that contain (meth)acryloyl groups and free isocyanate groups,

b) urethane (meth)acrylates that contain (meth)acryloyl groups and free hydroxyl groups,

c) a ultraviolet initiator that initiates radical polymerization and

d) optionally, one or more compounds that react with isocyanates.

2. The coating composition according to claim 1, wherein the compound that reacts with isocyanate is a polyol.

3. The coating composition according to claim 1, wherein the compound that reacts with isocyanate contains ethylenically unsaturated groups.

4. The coating composition according to claim 1, wherein a further compound that reacts with isocyanate is a sterically hindered, secondary, polybasic amine.

5. The coating composition according to claim 1, further comprising a UV absorber having an absorption range of up to 390 nm.

6. The coating composition according to claim 1, further comprising a HALS amine.

7. A heat-sensitive article coated with a coating composition according to claim 1.

8. An article having complex three-dimensional shape coated with a coating composition according to claim 1.