IP Library Granted Patent US 8,722,788
Granted Patent B2
US 8,722,788 · App. 12/094,277 · Granted May 13, 2014

Transparent TPU (thermoplastic polyurethanes)/PMMA (polymethyl (meth) acrylate) blends with improved low-temperature impact resistance

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Quick Facts
Patent No.
US 8,722,788
App. No.
12/094,277
Granted
May 13, 2014
Kind
B2
Abstract

The invention describes transparent plastics mixtures having low-temperature impact resistance composed of a thermoplastic polyurethane (TPU) and of an impact-modified poly(meth)acrylate (PMMA).

Claims (17)

1. A transparent plastic mixture having a low temperature impact resistance comprising thermoplastic polyurethane and poly(meth)acrylate; wherein said poly(meth)acrylate is an impact-modified poly(meth)acrylate,

wherein the mixture excludes a copolymer derivable from polyacrylonitriles and polystyrenes.

2. The transparent plastic mixture according to claim 1 , wherein a weight ratio of said thermoplastic polyurethane to said poly(meth)acrylate is 10-50:90-50.

3. The transparent plastic mixture according to claim 1 , wherein a weight ratio of said thermoplastic polyurethane to said poly(meth)acrylate is 20-40:80-60.

4. The transparent plastic mixture according to claim 1 , wherein said impact-modified poly(meth)acrylate is an impact-resistant molding composition comprising: from 10 wt. % to 50 wt. % of an impact modifier; and from 50 wt. % to 90 wt. % of a poly(meth)acrylate molding composition.

5. The transparent plastic mixture according to claim 1 , wherein said poly(meth)acrylate comprises an impact-modified poly(meth)acrylate and scattering particles having an average particle diameter of from 1 μm to 300 μm, wherein said scattering particles are present in an amount of from 1 wt. % to 50 wt. % based on the total weight of the transparent plastic mixture.

6. The transparent plastic mixture according to claim 1 , wherein said thermoplastic polyurethane is prepared from polyhydric alcohols and aliphatic isocyanates.

7. An impact-resistant molding composition comprising the transparent plastic mixture according to claim 1 , wherein the impact-resistant molding composition has a transmittance of >80% (t=3 mm), a modulus of elasticity of >1400 MPa, a Vicat softening point of >80° C. as determined according to DIN ISO 306 (B), and a Charpy impact resistance of >100 kJ/m 2 at 23° C., a Charpy impact resistance of >30 kJ/m 2 at −10° C., and a Charpy impact resistance of >20 kJ/m 2 at −20° C.

8. The impact-resistant molding composition according to claim 7 , further comprising diffuser beads.

9. A foil comprising the impact-resistant molding composition according to claim 7 .

10. A coated article comprising an article coated with the foil of claim 9 .

11. The coated article according to claim 10 , wherein said article is selected from sports equipment and an automobile bodywork.

12. An injection-molded article comprising the impact-resistant molding composition according to claim 7 .

13. The injection-molded article according to claim 12 , wherein said injection-molded article is an automobile part.

14. The transparent plastic mixture according to claim 1 , wherein said low temperature impact resistance is measured at one of the following temperatures −40° C. or −10° C.

15. The transparent plastic mixture according to claim 1 , wherein said low temperature is at temperatures of between −40° C. or −10° C.

16. The transparent plastic mixture according to claim 1 , which consists of said thermoplastic polyurethane and poly(meth)acrylate.

Assignments (4)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 18, 2024
From: RÖHM GMBH
To: CPS GMBH
Reel/Frame 068018/0325 →
CORPORATE ADDRESS CHANGE Recorded Jul 31, 2020
From: ROEHM GMBH
To: ROEHM GMBH
Reel/Frame 053837/0501 →
CHANGE OF NAME Recorded Sep 30, 2019
From: EVONIK RÖHM GMBH
To: RÖHM GMBH
Reel/Frame 050587/0022 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 1, 2008
From: SCHULTES, KLAUS; BATTENHAUSEN, PETER; GOLCHERT, URSULA; LOIDL, ADALBERT
To: EVONIK ROEHM GMBH; CPS GMBH
Reel/Frame 021616/0570 →