Syntactic Polyurethanes and the Use Thereof of for Off-Shore Shore Damping

• US 20070240781A1
• Filed: 05/17/2005
• Published: 10/18/2007
• Est. Priority Date: 05/18/2004
• Status: Abandoned Application

• Current Assignee: BASF AG (BASF SE)
• Original Assignee: BASF AG (BASF SE)
• Inventors: Huntemann, Peter, Lang-Wittkowski, Gabriele, Jahns, Ekkehard, Schilling, Udo
• Application Number:
  US11/579,591
• Publication Number:
  US 20070240781A1
• Time in Patent Office: Days
• US Class Current: 138/146
• CPC Class Codes: C08G 18/6666 Compounds of group C08G18/48 or C08G18/52
• CPC Class Codes: C08J 2375/04 Polyurethanes
• CPC Class Codes: C08J 9/0009 Phase change materials
• CPC Class Codes: C08J 9/32 from compositions containing microballoons, e.g. syntactic foams
• CPC Class Codes: C08K 7/28 Glass
• CPC Class Codes: C08K 9/10 Encapsulated ingredients
• CPC Class Codes: C08L 2666/66 Substances characterised by their function in the composition
• CPC Class Codes: C08L 75/08 from polyethers
• CPC Class Codes: C09K 5/063 Materials absorbing or liberating heat during crystallisation; Heat storage materials
• CPC Class Codes: F28D 20/023 the latent heat storage material being enclosed in granular particles or dispersed in a porous, fibrous or cellular structure
• CPC Class Codes: Y02E 60/14 Thermal energy storage

Abstract

The invention relates to syntactic polyurethanes, obtainable by reacting a polyisocyanate component (a) with a polyol component (b), in the presence of hollow microspheres (c) and encapsulated latent heat stores (d). The invention furthermore relates to the use of the syntactic polyurethanes for insulating offshore pipes, and insulated offshore pipes as such, and other parts and apparatuses used in the offshore sector.

Claims

1. A syntactic polyurethane,

obtainable obtained by reacting

a) a polyisocyanate component with

b) a polyol component, the polyol component (b) containing two or more constituents selected from

b1) polyetherpolyols based on a difunctional initiator molecule,

b2) polyetherpolyols based on a trifunctional initiator molecule and

b3) chain extenders,

in the presence of

c) hollow microspheres and

d) encapsulated latent heat stores.

2. The syntactic polyurethane according to claim 1, wherein the individual constituents of the polyol component b) are chosen so that the polyol component b) has a viscosity of less than 1000 mPa·

s at 25°

C., measured according to DIN 53019.

3. The syntactic polyurethane according to claim 1, wherein the constituents

b1) are present in an amount of from 20 to 60% by weight,

b2) are present in an amount of from 20 to 60% by weight and

b3) are present in an amount of from 5 to 25% by weight, based on the total weight of the polyol component b), in the component b).

4. The syntactic polyurethane according to claim 1, wherein a liquid/solid phase transition of the encapsulated latent heat stores (d) is in the range from 30°

C. to 100°

C.

5. The syntactic polyurethane according to claim 1, wherein the encapsulated latent heat stores (c) are present in the form of a particle size distribution, the mean particle diameter of the distribution (D_m) being from 1 to 90 μ

m and at least 80% of the particles, based on 100% of the particles (N) present in the distribution, having a diameter which has a value of from 0.2 D_m to 3 D_m.

7. A method for insulating offshore pipes and/or producing sockets for offshore pipes, and for producing or coating of parts and apparatuses in the offshore sector, comprising using the syntactic polyurethane of claim 1.

8. An offshore pipe composed of

(i) an inner pipe and, adhesively mounted thereon, and

(ii) a layer of syntactic polyurethane according to claim 1.

9. The offshore pipe according to claim 8, wherein the layer (ii) of syntactic polyurethane has a thickness of from 5 to 200 mm.

10. A process for the production of offshore pipes according to claim 8, comprising the steps providing an inner pipe that is to be coated with syntactic polyurethane, rotating the pipe to be coated and application of an unreacted reaction mixture for the production of the layer of syntactic polyurethane, comprising the components a), b) and c), to the rotating pipe.

6. A process for the preparation of syntactic polyurethanes by reacting

a) a polyisocyanate component with

b) a polyol component, the polyol component (b) containing two or more constituents selected from

b1) polyetherpolyols based on a difunctional initiator molecule,

b2) polyetherpolyols based on a trifunctional initiator molecule and

b3) chain extenders,

in the presence of

c) hollow microspheres and

d) encapsulated latent heat stores.