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Bela Prokai Phones & Addresses

  • Carmel, IN
  • Winhall, VT
  • 4 Wilderness West Rd W, Newtown, CT 06470 (203) 426-9230
  • Fairfield, CT
  • North Branford, CT
  • 4 Wilderness West Rd, Newtown, CT 06470

Publications

Us Patents

Surface Active Silicones

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US Patent:
40936422, Jun 6, 1978
Filed:
Dec 20, 1976
Appl. No.:
5/752879
Inventors:
Curtis L. Schilling - Croton-on-Hudson NY
Bela Prokai - Mahopac NY
Bernard Kanner - West Nyack NY
Assignee:
Union Carbide Corporation - New York NY
International Classification:
C07F 710
US Classification:
544106
Abstract:
This invention relates to ion-pair-containing siloxane compounds that are extremely effective as surface tension depressants. The compounds of the present invention contain both anionic and cationic substituents and can be formed by metathesis reactions between metallic salts of anionic silicone or organic surface-active compounds and halide salts of quaternary ammonium silicone or organic surface-active compounds. The compounds of the invention are relatively pH insensitive when compared to siloxanes bearing anionic and cationic substituents that are formed by proton transfer. Thus, the organosilicon compounds of the invention will remain stable despite changes in pH of the mixture in which they are present.

Polyether Urethane Foam Produced With Cyano-Ether Polysiloxane-Polyoxyalkylene Copolymers

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US Patent:
40584941, Nov 15, 1977
Filed:
May 28, 1976
Appl. No.:
5/691021
Inventors:
Bela Prokai - Mahopac NY
Bernard Kanner - West Nyack NY
Assignee:
Union Carbide Corporation - New York NY
International Classification:
C08G 1814
C08K 554
US Classification:
260 25AH
Abstract:
Organosilicone compositions are provided which comprise polysiloxane-polyoxyalkylene copolymers containing monofunctional siloxy units (M. sub. o) and, for every two moles of M. sub. o, an average of between about 10 and about 200 difunctional dialkylsiloxy units, an average of between about 2 and about 100 silicon-bonded cyano-bearing ether groups (Q) having the formula, --(O). sub. q R'OR"CN, wherein q is zero or one, R' is bivalent alkylene of 3 to 8 carbon atoms and R" is bivalent alkylene of 2 to 4 carbon atoms, and an average of between about 2 and about 30 silicon-bonded, organic-capped polyoxyalkylene blocks (E), the polyoxyalkylene content of said copolymers being constituted of between about 20 and about 65 weight percent of oxyethylene units, said M. sub. o units having at least two alkyls bonded to the respective silicon atoms thereof, the remaining organic group of M. sub. o being alkyl, Q or E, said copolymers also containing difunctional monoalkylsiloxy units the remaining organic group bonded to the respective silicon atoms thereof being Q or E.

Solvent Solutions Of Siloxane Fluids

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US Patent:
40124010, Mar 15, 1977
Filed:
May 11, 1976
Appl. No.:
5/685139
Inventors:
Bela Prokai - Mahopac NY
Assignee:
Union Carbide Corporation - New York NY
International Classification:
C07F 710
C07F 718
US Classification:
2604482N
Abstract:
A solvent-solution of a cyanoalkoxy-alkyl modified siloxane fluid.

Acrylonitrile-Capped Polyether-Siloxane

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US Patent:
40439518, Aug 23, 1977
Filed:
Oct 30, 1975
Appl. No.:
5/627251
Inventors:
Bela Prokai - Mahopac NY
Bernard Kanner - West Nyack NY
Assignee:
Union Carbide Corporation - New York NY
International Classification:
C08J 900
US Classification:
260 25AH
Abstract:
Acrylonitrile-capped polyoxyalkylene compounds; siloxane polymers modified with the corresponding radicals of said compounds; solvent compositions containing said siloxane polymers; a process for producing polyurethane foam using said siloxane polymers as the foam stabilizer; and the foam produced from said process.

Cyano-Ether Polysiloxane-Polyoxyalkylene Copolymers

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US Patent:
39794202, Sep 7, 1976
Filed:
Dec 27, 1974
Appl. No.:
5/536885
Inventors:
Bela Prokai - Mahopac NY
Bernard Kanner - West Nyack NY
Assignee:
Union Carbide Corporation - New York NY
International Classification:
C07F 710
C07F 718
US Classification:
2604488R
Abstract:
Organosilicone compositions are provided which comprise polysiloxane-polyoxyalkylene copolymers containing monofunctional siloxy units (M. sub. o) and, for every two moles of M. sub. o, an average of between about 10 and about 200 difunctional dialkylsiloxy units, an average of between about 2 and about 100 silicon-bonded cyano-bearing ether groups (Q) having the formula, -(O). sub. q R'OR"CN, wherein q is zero or one, R' is bivalent alkylene of 3 to 8 carbon atoms and R" is bivalent alkylene of 2 to 4 carbon atoms, and an average of between about 2 and about 30 silicon-bonded, organic-capped polyoxyalkylene blocks (E), the polyoxyalkylene content of said copolymers being constituted of between about 20 and about 65 weight percent of oxyethylene units, said M. sub. o units having at least two alkyls bonded to the respective silicon atoms thereof, the remaining organic group of M. sub. o being alkyl, Q or E, said copolymers also containing difunctional monoalkylsiloxy units the remaining organic group bonded to the respective silicon atoms thereof being Q or E.

Polyester Urethane Foam Produced With Cyano-Ether Polysiloxane-Polyoxyalkylene Copolymers

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US Patent:
40584933, Nov 15, 1977
Filed:
May 28, 1976
Appl. No.:
5/691020
Inventors:
Bela Prokai - Mahopac NY
Bernard Kanner - West Nyack NY
Assignee:
Union Carbide Corporation - New York NY
International Classification:
C08G 1842
C08K 554
US Classification:
260 25AH
Abstract:
Organosilicone compositions are provided which comprise polysiloxane-polyoxyalkylene copolymers containing monofunctional siloxy units and difunctional siloxy units, an average of between about 2 and about 20 silicon-bonded cyano-bearing ether groups for every two moles of monofunctional units, said cyano-bearing ether groups having the formula, --(O). sub. q R'OR"CN, wherein q is 0 or 1, R' is bivalent alkylene of 3 to 8 carbon atoms and R" is bivalent alkylene of 2 to 4 carbon atoms, and an average of between about 2 and about 30 silicon-bonded, organic-capped polyoxyalkylene blocks for every two moles of monofunctional units, at least 75 weight percent of the polyoxyalkylene content of said copolymers being constituted of oxyethylene units, said monofunctional units having at least two alkyls bonded to the respective silicon atoms thereof and the difunctional units having at least one alkyl bonded to the respective silicon atoms thereof, the remaining organic group bonded to silicon of the respective monofunctional and difunctional siloxy units being alkyl, said cyano-bearing ether group or said polyoxyalkylene block. The polymers of the invention are effective stabilizers of flexible polyester polyol-based polyurethane foam and offer particular advantage in the formation of flame-retarded foam.

Polyether Urethane Foam

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US Patent:
39666506, Jun 29, 1976
Filed:
Oct 7, 1974
Appl. No.:
5/512861
Inventors:
Bela Prokai - Mahopac NY
Assignee:
Union Carbide Corporation - New York NY
International Classification:
C08K 554
C08G 1814
US Classification:
260 25AH
Abstract:
A process for producing high resilience polyether urethane foam using a cyanoalkoxy-alkyl modified siloxane fluid; the foams derived therefrom; a solvent-solution of said siloxane; and cyanoalkoxy-alkyl modified siloxane fluids per se.

Heterocyclic Nitrogen Containing Siloxanes

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US Patent:
40595811, Nov 22, 1977
Filed:
May 16, 1975
Appl. No.:
5/578091
Inventors:
Bela Prokai - Mahopac NY
Assignee:
Union Carbide Corporation - New York NY
International Classification:
C07F 704
US Classification:
544 69
Abstract:
Cationic bis(trimethylsiloxy) siloxanes of the formula: MD. sub. x' M wherein M is the trimethylsiloxy units, Me. sub. 3 SiO. sub. 1/2, x is an integer of 1 to 3, preferably 1, and D' is a cationic difunctional siloxy unit of the formula: ##STR1## wherein R. degree. is a divalent organic group, t is 0 to 1, R is methyl or ethyl, R. sub. 2 N is a five to six member organic heterocyclic ring and X is an anion. Also the tertiary amino bis(trimethylsiloxy) siloxanes of the formula MD. sub. x M wherein M and x are as defined above and D is a tertiary amino difunctional siloxy unit of the formula: R. sub. 2 NR. degree. (O). sub. t Si(Me)O wherein R. sub. 2 N, R. degree. and t are as defined above, which are used in preparing the above cationic siloxanes. The above cationic siloxanes are useful as emulsifiers, e. g.
Bela P Prokai from Carmel, IN, age ~87 Get Report