Isocyanate-based polymer foam composite with improved thermal insulation properties

Patent metadata

Field	Value
Publication number	US-9328859-B2
Application number	US-201114234067-A
Country	US
Kind code	B2
Filing date	Jul 26, 2011
Priority date	Jul 26, 2011
Publication date	May 3, 2016
Grant date	May 3, 2016

Abstract

This invention relates to rigid isocyanate-based polymer foam and composites thereof comprising a carbon black component comprising at least 50 weight percent of a fluorinated carbon black. Said foam having improved thermal properties, specifically, rigid polyurethane and/or polyisocyanurate foams for use in said insulation applications.

First claim

The invention claimed is:

1. A method to insulate a surface or an enclosure by applying to the surface or enclosure a composite comprising at least one substrate in contact with a rigid polyurethane foam made from a reactive formulation comprising a mixture of:
(A) an A-side comprising
(i) an organic isocyanate comprising 2,4′-diphenylmethane diisocyanate (MDI), 2,2′-diphenylmethane diisocyanate, 4,4′-diphenylmethane diisocyanate, or mixtures thereof,

(B) a B-side comprising:
(ii) an isocyanate-reactive component,
(iii) a blowing agent,
and
(iv) one or more additional component selected from a catalyst, a nucleating agent, a surfactant, a crosslinker, a chain extender, a flame retardant, a filler, a colorant, a pigment, an antistatic agent, reinforcing fibers, an antioxidant, a preservative, an infrared blocking agent, or an acid scavenger,

and
(C) from 3 to 7 parts carbon black comprising (v) from 50 to 100 percent by weight of a fluorinated carbon black having a fluorine to carbon (F/C) molar ratio of at least 10/90, wherein parts by weight are based on 100 parts by weight of the B-side component (B) and component (C) may be either wholly in the A-side (A), wholly in the B-side (B), or a portion in the A-side and a portion in the B-side wherein said polyurethane foam is greater than 90 percent closed-cell according to ASTM D2856-A.

2. The method of claim 1 wherein the organic isocyanate further comprises 2,4-toluene diisocyanate (TDI), 2,6-toluene diisocyanate, or mixtures thereof; mixtures of diphenylmethane diisocyanates and oligomers thereof having an isocyanate functionality greater than 2; or MDI comprising urethane, allophanate, urea, biuret, carbodiimide, uretonimine and/or isocyanurate groups.

3. The method of claim 1 wherein the isocyanate-reactive component is a polyether polyol having a functionality of from 2 to 8 and a hydroxyl number of from 100 and 850.

4. The method of claim 1 wherein the blowing agent is a physical blowing agent, a chemical blowing agent, or mixture thereof.

5. The method of claim 1 wherein the carbon black component (C) is 100 percent fluorinated carbon black (v).

6. The method of claim 1 wherein the fluorinated carbon black has an average particle size of from 5 nm to 500 nm.

7. The method of claim 1 wherein said foam has a k-factor determined according to ISO 12939-01 such that the k-factor of the foam is at least 0.2 mW/mK below the k-factor of a corresponding foam prepared from the same foam-forming composition except that the fluorinated carbon black is omitted.

8. The method of claim 1 wherein the surface or enclosure is a house, a roof, a building, a refrigerator, a freezer, an appliance, a pipe, or a vehicle.

Assignees

• Yin Yige
• Chen Jing G
• Wang Beilei
• Ye Li
• Parenti Vanni
• Dow Global Technologies Llc

Inventors

• Yin Yige
• Chen Jing G
• Wang Beilei
• Ye Li
• Parenti Vanni

Classifications

• C08G18/7664 Primary

  containing alkylene polyphenyl groups · CPC title

• F16L59/028 Primary

  Compositions for or methods of fixing a thermally insulating material · CPC title

• B29L2023/225

  Insulated · CPC title

• B29K2105/046

  with closed cells · CPC title

• C08G2101/005

  Chemistry & Metallurgy · mapped topic