Sven H Ruetman from Danville, CA, age 80

Process For Preparing Ring-Perchlorinated Pyrazine-Isocyanates
view source
US Patent:

39577813, May 18, 1976
Filed:

Feb 6, 1974
Appl. No.:

5/440216
Inventors:

Sven H. Ruetman - Walnut Creek CA
Assignee:

The Dow Chemical Company - Midland MI
International Classification:

C07D24120
US Classification:

260250BN
Abstract:

The invention comprises a process for producing ring-perchlorinated aromatic carbocyclic and N-heterocyclic isocyanates by the vapor phase chlorination of the corresponding acetamido-substituted carbocycle or N-heterocycle. The resulting isocyanate may be further reacted with an active hydrogen-containing compound to form the corresponding carbamate, thiocarbamate, urea, or the like. The invention further comprises certain novel compounds made by such process, said compounds being useful as intermediates for plastic materials or as fine retardant additives in plastics.

6-Hydrazino-2,3,5-Trihalo-4-Alkylthio Pyridines And Method Of Preparing Same
view source
US Patent:

39622606, Jun 8, 1976
Filed:

Jul 31, 1975
Appl. No.:

5/600674
Inventors:

Sven H. Ruetman - Walnut Creek CA
Richard N. Watson - Antioch CA
Assignee:

The Dow Chemical Company - Midland MI
International Classification:

C07D21362
US Classification:

2602948F
Abstract:

Novel compounds having the formula ##SPC1## Wherein R is an alkyl group of 1 to 5 carbons, X is Br or Cl and Y is Cl or is Br except when X is Cl, are prepared by the reaction of a hydrazine source material with a corresponding compound of the formula ##SPC2## The product compounds are fungicidal in their own right and are readily oxidized to highly active trihalo-4-alkylsulfonyl pyridine fungicides.

Semi-Continuous Process For The Preparation Of Polyurethane-Urea Aqueous Dispersions
view source
US Patent:

50378643, Aug 6, 1991
Filed:

Jul 11, 1989
Appl. No.:

7/378532
Inventors:

Joginder N. Anand - Clayton CA
Sven H. Ruetman - Walnut Creek CA
Assignee:

The Dow Chemical Company - Midland MI
International Classification:

C08G 1812
US Classification:

523348
Abstract:

A semi-continuous process for the preparation of polyurethane ionomer or polyurethane-urea ionomer aqueous dispersions which comprises: A. in a first reaction zone contacting (i) an excess of an aliphatic or cycloaliphatic diisocyanate, or mixture of an aliphatic or cycloaliphatic diisocyanate with an aromatic diisocyanate; (ii) an organic polyol, and (iii) a difunctional isocyanate-reactive component containing an ionic group or potential ionic group, under conditions such that an isocyanate terminated ionic prepolymer is formed; with the proviso that where an aromatic diisocyanate is used the equivalents of aromatic diisocyanate used are less that the equivalents of the organic polyol and difunctional isocyanate-reactive component; B. transferring the prepolymer to a second reaction zone; C. in the first reaction zone or the second reaction zone contacting the prepolymer with a neutralizing agent under conditions such that the ionic groups are neutralized; D.

4,6-Dibromo-5-Hydroxy-2-Pyridine Nitrile Compounds And Method Of Preparation
view source
US Patent:

39563383, May 11, 1976
Filed:

Jan 17, 1975
Appl. No.:

5/541811
Inventors:

Alin H. Gulbenk - Walnut Creek CA
Sven H. Ruetman - Walnut Creek CA
Assignee:

The Dow Chemical Company - Midland MI
International Classification:

C07D21357
US Classification:

2602949
Abstract:

The invention is a genus of compounds of the formula ##SPC1## Wherein Y is H, M or RCO--; R is a primary or secondary C. sub. 1 -C. sub. 12 alkyl group, a C. sub. 5 -C. sub. 7 cycloalkyl group, phenyl or a C. sub. 7 -C. sub. 12 phenalkyl or alkylphenyl group and M is a metal or ammonium cation. The compounds have utility as intermediates and as herbicides.

Antistatic Polyurethane-Urea Dispersions
view source
US Patent:

49201670, Apr 24, 1990
Filed:

Nov 10, 1988
Appl. No.:

7/269506
Inventors:

Sven H. Ruetman - Walnut Creek CA
Joginder N. Anand - Clayton CA
G. Robert Collins - Walnut Creek CA
Assignee:

The Dow Chemical Company - Midland MI
International Classification:

C08G 1806
US Classification:

524155
Abstract:

Disclosed is dispersion of a polyurethane-urea polymer in a continuous phase. This dispersion contains about 0. 1 to about 5 parts by weight of an ionizable, non-volatile salt per 100 parts by weight of polyurethane-urea polymer. Polyurethane-urea coatings made from this dispersion have excellent static dissipative properties.

Modulus Modification Of Water Borne Polyurethane-Ureas
view source
US Patent:

48958948, Jan 23, 1990
Filed:

May 31, 1988
Appl. No.:

7/200287
Inventors:

Sven H. Ruetman - Walnut Creek CA
Joginder N. Anand - Clayton CA
Assignee:

The Dow Chemical Company - Midland MI
International Classification:

C08L 7512
C08L 7508
US Classification:

524840
Abstract:

Disclosed are novel stable aqueous dispersions of ionic polyurethane-polyureas prepared from (A) aqueous dispersions of isocyanate terminated ionic prepolymers and (B) hydrocarbon polyamine extenders. The novelty resides in employing a mixture of a diol and triol in the prepolymer forming step. Also disclosed are the films and coated substrates obtained through the use of said dispersions as coatings.

Bulk Polyurethane Ionomers
view source
US Patent:

49564382, Sep 11, 1990
Filed:

Feb 8, 1989
Appl. No.:

7/308350
Inventors:

Sven H. Ruetman - Walnut Creek CA
Joginder N. Anand - Clayton CA
Assignee:

The Dow Chemical Company - Midland MI
International Classification:

C08G 1812
US Classification:

528 60
Abstract:

The invention relates to bulk polyurethane ionomers prepared by the reaction (A) an isocyanate terminated ionic prepolymer with (B) a hydrocarbon polyol chain extender, said prepolymer having been prepared from (i) an excess of diisocyanate, (ii) a mixture comprising a diol and an organic polyol having three or more reactive hydroxyl moieties each having a molecular weight of from about 250 to about 6,000 and (iii) a difunctional isocyanate-reactive component containing an ionic group or potential ionic group.

Sven H Ruetman