IP Library › Granted Patent US 7,060,363
Granted Patent B2
US 7,060,363 · App. 10/694,106 · Granted Jun 13, 2006

Chromium-free, waterproof leather

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Quick Facts
Patent No.
US 7,060,363
App. No.
10/694,106
Granted
Jun 13, 2006
Kind
B2
Abstract

Chromium-free leather having a waterproofness, measured as penetration time according to DIN 53338, of at least 30 min.

Claims (5)

1. Chromium-free leather having a waterproofness, measured as penetration time according to DIN 53338, of at least 30 min characterized in that it has an Fe content of 1 to 6% by weight, based on dry weight, determined after ashing.

2. Chromium-free leather according to claim 1 , characterized in that the penetration time according to DIN 53338 is at least 2 hours.

3. Chromium-free leather according to claim 1 , characterized in that it has an Si content of at least 0.2% by weight, based on dry weight, determined as silicate after ashing.

4. Chromium-free leather according to claim 1 , characterized in that the leather contains a silicone.

5. Chromium-free leather according to claim 1 , characterized in that the water vapour permeability, measured according to DIN 53333, is greater than 0.8 mg/cm 2 h.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 1, 2006
From: BAYER AG
To: LANXESS DEUTSCHLAND GMBH
Reel/Frame 018584/0319 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 16, 2004
From: KLEBAN, MARTIN; KAPLAN, AHMET; REINERS, JUERGEN; WINTHER, HENRIK
To: BAYER AKTIENGESELLSCHAFT
Reel/Frame 014434/0746 →