Leather tanning processes and the products thereof

Details Leather tanning processes and the products thereof Leather tanning processes and the products thereof

1995-07-26

1999-10-26

Diamond, Alan

Bleaching and dyeing; fluid treatment and chemical modification

Treatment of hides, skins, feathers and animal tissues

Tanning

8 9418, 8 942, 8 9422, 8 9423, 8 9425, 8 9426, 8 9427, 8 943, 8 9432, 8 9433, 252 857, C14C 900, C14C 1100

Patent

active

059720379

ABSTRACT:
The production of household-machine washable and dryable, waterproof, nonflammable, and extremely colorfast leathers from wet blue hides by a process which has the advantage that significantly reduced volumes of toxic wastes are generated. The wet blue hides are washed and treated to equalize the pH at the surface and in the interior of the leather and to build at least one wanted end characteristics such as suppleness into the leather. This is followed by the introduction of additional character builders into the pores of the hide and the substitution of one or more softening agents for fats originally present in the pores of the hide. Next in a typical application of the invention are dyeing and the fixing of previously introduced substances in the pores of the hide. This is followed by refloatation with a hydrophobic waterproofing agent and buffering for pH equalization and increase of the pH. The hides are next treated to impart a pleasing, silky feel to the leather into which the hides are being converted and a hydrophobic silicone which promotes waterproofability and washability; and this is followed by a second fixing step.

REFERENCES:
patent: 3888625 (1975-06-01), Dawson
patent: 4701269 (1987-10-01), Bay et al.
patent: 4780222 (1988-10-01), Amati
patent: 4961750 (1990-10-01), Christner et al.
patent: 4999024 (1991-03-01), Scheen
Thorstensen, Practical Leather Technology, 1976, p. 237.
Material Safety Data Sheet, Tergotan EFB, 284002, Sandoz Chemicals Corporation, Feb. 2, 1993.
Material Safety Data Sheet, Tergotan MC-N, 262493, Sandoz Chemicals Corporation, Feb. 26, 1993.
Material Safety Data Sheet, DERMALIX C, 240352, Sandoz Chemicals Corporation, Feb. 10, 1995.
Material Safety Data Sheet, L-80, Salem Oil & Grease Co. (Date Unknown).
Material Safety Data Sheet, Basyntan DLE, 510211, BASF Corporation (Date Unknown).
Material Safety Data Sheet, Chromitan, 595072, BASF Corporation (Date Unknown).
Material Safety Data Sheet, Ombrophob M, 238072, Sandoz Chemicals Corporation, Mar. 30, 1995.
Material Safety Data Sheet, Catalix GS, 233612, Sandoz Chemicals Corporation Mar. 30, 1995.
Material Safety Data Sheet, Densodrin S, 512618, BASF Corporation (Date Unknown).

Affiliated with

Also associated with

Rating

Leather tanning processes and the products thereof does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Leather tanning processes and the products thereof, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Leather tanning processes and the products thereof will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-758603