Ir-absorbing compositions

• US 20030094600A1
• Filed: 10/31/2002
• Published: 05/22/2003
• Est. Priority Date: 05/05/2000
• Status: Active Grant

• Current Assignee: Institut für Neue Materialien Gemeinnützige GmbH
• Original Assignee: Institut für Neue Materialien Gemeinnützige GmbH
• Inventors: Nonninger, Ralph, Schmidt, Helmut, Hoheisel, Werner, Jost, Martin, Schichtel, Martin, Döbler, Martin
• Granted Patent: US 7,074,351 B2
• Time in Patent Office: Days
• US Class Current: 252/500
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: C08K 3/22 of metals
• CPC Class Codes: C08K 9/06 with silicon-containing compounds
• CPC Class Codes: G02B 5/208 for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation
• CPC Class Codes: Y10T 428/29 Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
• CPC Class Codes: Y10T 428/2947 Synthetic resin or polymer in plural coatings, each of different type
• CPC Class Codes: Y10T 428/2982 Particulate matter [e.g., sphere, flake, etc.]

Abstract

The present invention provides compositions containing transparent thermoplastic polymer, surface-modified oxide particles with a particle size of less than 200 nm, and organic NIR absorbers. The compositions of the present invention may find use in reducing diathermancy in sheets, films, glazing systems and roofing systems which may be incorporated into automobiles and buildings.

Claims

1. Compositions containing

a) a transparent thermoplastic polymer and

b) oxide particles selected from the group consisting of indium oxide in which 2 to 30% of the indium atoms are replaced by tin atoms, indium oxide in which 10 to 70% of the oxygen atoms are replaced by fluorine atoms, tin oxide in which 2 to 60% of the tin atoms are replaced by antimony atoms, tin oxide in which 10 to 70% of the oxygen atoms are replaced by fluorine atoms, zinc oxide in which 1 to 30% of the zinc atoms are replaced by aluminium atoms, zinc oxide in which 2 to 30% of the zinc atoms are replaced by indium atoms, zinc oxide in which 2 to 30% of the zinc atoms are replaced by gallium atoms, perovskites, and compounds having the composition A_xBO₃₋

y, whereby

0.01<

x<

3,

0.001<

y<

1.5,

A=Ca, Sr, Ba, Al, In, Sn, Pb, Cu, Ag, Cd, Li, Na, K, Rb, Cs, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, H or NH₄ and

B=W, Mo or Re

and whereby the average particle size of the oxide particles is less than 200 nm,

and whereby the surface of the oxide particles is modified with a polyvinyl acetal or with a compound having the general formula (I)

SiR¹R²R³R⁴ 

 

(I)

 

where

R¹=alkyl substituent with 1 to 30 C atoms,

R²=alkyl substituent with 1 to 30 C atoms or alkoxy substituent with 1 to 30 C atoms or Cl or Br or I,

R³=alkyl substituent with 1 to 30 C atoms or alkoxy substituent with 1 to 30 C atoms or Cl or Br or I,

R⁴=alkoxy substituent with 1 to 30 C atoms or Cl or Br or I, and

c) organic NIR absorbers.

2. Compositions according to claim 1, whereby the organic NIR absorber is a compound having the general formula (II)

3. Compositions according to claim 1, whereby the organic NIR absorber is a compound having the formula (III)

4. Process for the production of compositions according to any one of claims 1 to 3 by addition of the oxide particles and the organic NIR absorbers, together or separately, before, during or after polymerisation of the transparent, thermoplastic polymer to the transparent thermoplastic polymer or to the monomers from which the transparent thermoplastic polymer is polymerised.

5. Use of the compositions according to any one of claims 1 to 3 in the manufacture of sheets, films, glazing systems, roofing systems or other products.

6. Process for the manufacture of products from compositions according to any one of claims 1 to 3, consisting in processing the compositions by extrusion or injection moulding.

7. Products containing the compositions according to any one of claims 1 to 3.

8. Sheets or films or glazing systems or roofing systems containing the compositions according to any one of claims 1 to 3.