Transparent, anti-fogging coating comprised of plastic material containing a surface active agent

• US 4,609,688 A
• Filed: 04/22/1985
• Issued: 09/02/1986
• Est. Priority Date: 07/22/1983
• Status: Expired due to Term

• Current Assignee: Saint-Gobain Vitrage
• Original Assignee: Saint-Gobain Vitrage
• Inventors: Radisch, Helmer, Scholz, Werner
• Primary Examiner(s): WELSH JR, MAURICE
• Application Number:
  US06/725,679
• Time in Patent Office: 498 Days
• Field of Search: 523/169, 524/375, 524/376, 524/377, 528/49, 528/494, 427/389.7, 427/430.1, 427/443.2, 428/410, 428/425.6
• US Class Current: 523/169
• CPC Class Codes: B32B 17/1033 Laminated safety glass or glazing containing temporary protective coatings or layers
• CPC Class Codes: B32B 17/1077 containing polyurethane
• CPC Class Codes: B32B 17/10834 using a fluid
• CPC Class Codes: C08K 5/0008 Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
• CPC Class Codes: C08L 75/04 Polyurethanes
• CPC Class Codes: Y10T 428/315 Surface modified glass [e.g., tempered, strengthened, etc.]
• CPC Class Codes: Y10T 428/31601 Quartz or glass

Abstract

The invention relates to a transparent, antifogging coating or film comprised of a plastic material, which coating or film may be employed as an external layer in a laminated pane.

The invention transparent coating or film is a highly elastic, three-dimensionally crosslinked layer comprised of at least one surface active agent disposed within its crosslinked structure.

Claims

1. A coating or film having anti-lacerative or self-healing properties comprising a transparent, highly elastic, heat-setting three dimensionally crosslinked polyurethane, and an effective amount of at least one surface active agent comprising one or more C₈ -C₁₆ polyethoxylated fatty alcohols disposed therein.

2. The coating or film of claim 1 wherein the surface active agent is a C₁₂ to C₁₄ linear alcohol ethoxylated by about 7 mols of epoxyethane per mole of the alcohol.

3. The coating or film of claim 1 wherein the surface active agent is an octyl alcohol ethoxylated by about 4 moles of epoxyethane per mole of the alcohol.

4. The coating or film of claim 1, wherein said surface active agent is used in an amount by weight which is approximately equal to the amount of polyurethane used.

5. A laminated pane comprising:

(a) a monolithic or laminated support of a silicate glass material or plastic material, and

(b) a coating or film layer on said support having anti-lacerative or self-healing properties comprising a transparent, highly elastic, heat-setting three-dimensionally crosslinked polyurethane and an effective amount of at least one surface active agent comprising one or more C₈ -C₁₆ polyethoxylated fatty alcohols disposed therein.

6. The laminated pane of claim 5, wherein the surface active agent is a C₁₂ -C₁₄ linear alcohol ethoxylated by about 7 moles of epoxyethane per mole of the alcohol.

7. The laminated pane of claim 5, wherein the surface active agent is an octyl alcohol ethoxylated by about 4 moles of epoxyethane per mole of the alcohol.

8. The laminated pane of claim 5, wherein said surface active agent is used in an amount by weight which is approximately equal to the amount of polyurethane used.