Patents by Inventor Andrea La Spina

Andrea La Spina has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Addition compounds which contain phosphorus and their use as catalysts for the production of foam resins which contain carbodiimide groups
    Patent number: 4234694
    Abstract: Addition compounds based on:(a) phospholine oxides, phospholine sulphides, phospholane oxides or phospholane sulphides, and(b) mono-, di- and/or polyalcohols with a molecular weight of 32 to 250 or protonic acids whose N/10 aqueous solutions have a pH of between 1 and 8 or metal salts or acid chlorides are disclosed. These addition compounds are useful as catalysts for the preparation of carbodiimides, particularly carbodiimide foams which have improved properties.
    Type: Grant
    Filed: May 21, 1979
    Date of Patent: November 18, 1980
    Assignee: Bayer Aktiengesellschaft
    Inventors: Andrea La Spina, Werner Dietrich, Reinhard Schliebs
  • Compounds containing phosphorous and a method for making polycarbodiimide foams with the compounds as a catalyst
    Patent number: 4147710
    Abstract: A compound adapted to be used to advantage as a catalyst for making carbodiimide foams is prepared by a process wherein(a) a phosphetane oxide or phosphetane sulphide of the general Formulae I and II: ##STR1## wherein X represents a C.sub.1 -C.sub.18 alkyl, C.sub.2 -C.sub.18 alkenyl, C.sub.6 -C.sub.14 aryl, C.sub.7 -C.sub.20 aralkyl, C.sub.1 -C.sub.18 alkoxy or C.sub.6 -C.sub.14 aroxy group andR.sup.1 to R.sup.6 represent hydrogen and/or C.sub.1 -C.sub.4 alkyl groups and is reacted with(b) a mono-, di- and/or polyhydric alcohol having a molecular weight of about 32 to about 250, a protonic acid which has a pH of between 1 and 8 in N/10 aqueous solution, a metal salt or an acid chloride.
    Type: Grant
    Filed: September 23, 1975
    Date of Patent: April 3, 1979
    Assignee: Bayer Aktiengesellschaft
    Inventors: Andrea La Spina, Werner Dietrich, Reinhard Schliebs
  • Polyguanidine foams
    Patent number: 3941726
    Abstract: A polyguanidine foam is prepared by reacting an amine or ammonia with a polycarbodiimide foam which has been prepared from a reaction mixture containing an addition product of an alcohol and a phospholine oxide or sulphide. The novel foam may be used for heat insulation or as an absorbent material.
    Type: Grant
    Filed: April 2, 1974
    Date of Patent: March 2, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rolf Wiedermann, Andrea La Spina
  • Process for preparing polycarbodiimide foams in the presence of phosphetane oxide or sulfide adducts
    Patent number: 3931059
    Abstract: A compound adapted to be used to advantage as a catalyst for making carbodiimide foams is prepared by a process whereinA. a phosphetane oxide or phosphetane sulphide of the general Formulae I and II: ##EQU1## wherein X represents a C.sub.1 -C.sub.18 alkyl, C.sub.2 -C.sub.18 alkenyl, C.sub.6 -C.sub.14 aryl, C.sub.7 -C.sub.20 aralkyl, C.sub.1 -C.sub.18 alkoxy or C.sub.6 -C.sub.14 aroxy group andR.sup.1 to R.sup.6 represent hydrogen and/or C.sub.1 -C.sub.4 alkyl groups and is reacted withB. a mono-, di- and/or polyhydric alcohol having a molecular weight of about 32 to about 250, a protonic acid which has a pH of between 1 and 8 in N/10 aqueous solution, a metal salt or an acid chloride.
    Type: Grant
    Filed: August 19, 1974
    Date of Patent: January 6, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Andrea La Spina, Werner Dietrich, Reinhard Schliebs