Patents Represented by Attorney Denis A. Firth
  • Patent number: 4542041
    Abstract: An apparatus is disclosed for the continuous dispensing and blending of a fluid material with a particulate material in predetermined quantities. A master control is provided for synchronizing the startup and interruption of the systems for furnishing the particulate material and the fluid material and for operation of the blending apparatus, thereby facilitating the continuous operation thereof. The system is particularly adapted for use in the coating of wood furnish with binder adhesive prior to the pressing and heating of the wood furnish to form particle boards and the like.
    Type: Grant
    Filed: March 27, 1984
    Date of Patent: September 17, 1985
    Assignee: The Upjohn Company
    Inventors: Thomas R. McClellan, Pat L. Murray
  • Patent number: 4522762
    Abstract: A novel aliphatic diisocyanate, namely 1,4-bis(2-isocyanatoethyl)cyclohexane, is disclosed. Polyurethanes derived from this diisocyanate exhibit advantageous properties. Illustratively, polyurethane elastomers prepared from the above diisocyanate, a polymeric diol and a low molecular weight diol extender, possess significantly improved resilience properties and are useful in the preparation of automobile bumpers, fenders and the like.
    Type: Grant
    Filed: November 10, 1982
    Date of Patent: June 11, 1985
    Assignee: The Upjohn Company
    Inventors: Richard W. Oertel, III, Reinhard H. Richter, Benjamin W. Tucker
  • Patent number: 4518473
    Abstract: The photopolymerization of ethylenically unsaturated compounds is effected using a combination of an aromatic ketone photosensitizer and a tetrasubstituted urea (e.g. N,N,N',N'-tetramethylurea) or N,N-disubstituted acid amide. Storage stable liquid photoinitiator compositions comprising an aromatic ketone sensitizer (e.g. benzophenone) and a tetrasubstituted urea (e.g. N,N,N',N'-tetramethylurea) are also disclosed. The use of the tetrasubstituted urea or N,N-disubstituted amide possesses advantages (storage stability, lack of discoloration on curing) over photosensitizers such as Michler's ketone which have been used previously in combination with aromatic ketone photosensitizers.
    Type: Grant
    Filed: October 11, 1983
    Date of Patent: May 21, 1985
    Assignee: The Upjohn Company
    Inventor: Anthony F. Jacobine
  • Patent number: 4518765
    Abstract: An improved process for the anionic polymerization of lactams is described. Particular azetidinedione compounds are employed as promoters and their use not only permits low polymerization temperatures but gives rise to faster polymerization reactions than prior art procedures allow.The rapid polymerization of caprolactam in accordance with the present invention makes the process particularly suited to RIM procedures for preparing molded polyamides.
    Type: Grant
    Filed: March 19, 1984
    Date of Patent: May 21, 1985
    Assignee: The Upjohn Company
    Inventors: Steven J. Grossman, Kemal Onder
  • Patent number: 4516524
    Abstract: An apparatus is disclosed for the continuous dispensing and blending of a fluid material with a particulate material in predetermined quantities. A master control is provided for synchronizing the startup and interruption of the systems for furnishing the particulate material and the fluid material and for operation of the blending apparatus, thereby facilitating the continuous operation thereof. The system is particularly adapted for use in the coating of wood furnish with binder adhesive prior to the pressing and heating of the wood furnish to form particle boards and the like.
    Type: Grant
    Filed: February 16, 1983
    Date of Patent: May 14, 1985
    Assignee: The Upjohn Company
    Inventors: Thomas R. McClellan, Pat L. Murray
  • Patent number: 4501844
    Abstract: Disclosed are injection moldable, rapidly crystallization compositions comprising (A) a linear polyamide selected from the series poly(4,4'-methylenediphenylene azelamide to dodecanediamide); and (B) an amount sufficient to promote the crystallization of the linear polyamide, of a material selected from the group of (i) talc, (ii) sodium benzenesulfonate, (iii) a polyethylene ionomer, (iv) a methacrylated butadiene-styrene, and (v) a multi-phase composite interpolymer.The compositions crystallize rapidly from the molten state which allows for economically attractive molding procedures including fiber production and the production of aromatic-aliphatic polyamides having a combination of excellent properties.
    Type: Grant
    Filed: December 5, 1983
    Date of Patent: February 26, 1985
    Assignee: The Upjohn Company
    Inventors: Augustin T. Chen, David J. Goldwasser, Kemal Onder
  • Patent number: 4485247
    Abstract: A method is described for autoxidizing particular ortho-dialkyl substituted aromatic compounds using a particular type of solvent which gives rise to the formation of 3-alkanoyloxyphthalide compounds, some of which are novel.The phthalides in turn are ionically oxidized to their corresponding aromatic polycarboxylic acids.Combination of the two methods provides a means for converting ortho dialkyl substituted aromatic compounds directly to the corresponding polycarboxylic acids in higher yields and at generally lower overall temperatures and reaction conditions compared to prior art methods.Polycarboxylic acids so obtained are known to be useful in the preparation of alkyds, polyesters, and the like, and, particularly, in the formation of the corresponding acid anhydrides which are used in the preparation of organic high temperature polymers such as polyamides, polyamideimides, and polyimides.
    Type: Grant
    Filed: January 24, 1983
    Date of Patent: November 27, 1984
    Assignee: The Upjohn Company
    Inventor: Visweswara R. Durvasula
  • Patent number: 4480070
    Abstract: Isocyanate compositions are disclosed which yield aqueous emulsions on admixture with water. The emulsions are sufficiently stable to permit employment as particle board binders and like uses. The compositions of the invention are derived by reaction of a polymethylene polyphenyl polyisocyanate with a particular group of polyethylene glycols which have been capped with a block of propylene oxide residues.
    Type: Grant
    Filed: June 27, 1983
    Date of Patent: October 30, 1984
    Assignee: The Upjohn Company
    Inventors: Filippus Bosscher, John Penfold, Klaus W. Reich, Albertus Zandvoort
  • Patent number: 4472341
    Abstract: Disclosed is an improved process for the production of organic polyisocyanate based molded polymers prepared from at least one organic polyisocyanate and at least one polyol in the presence of an internal release agent wherein the improvement comprises employing as said agent a polysiloxane having at least one unit of the formula ##STR1## wherein R is selected from the group consisting of lower-alkyl and aryl, R.sup.1 is a divalent hydrocarbon radical, and R.sup.2 is selected from the group consisting of lower-alkoxy, aryloxy, particular hydroxyalkyleneoxy, alkoxyalkyleneoxy, amino, and hydroxyalkylamino radicals.The molding process can be repeated in many cycles before the molds require cleaning or treatment with release agent. The ease and rapidity with which the present process can be carried out makes it particularly suited to RIM production methods.
    Type: Grant
    Filed: July 5, 1983
    Date of Patent: September 18, 1984
    Assignee: The Upjohn Company
    Inventors: Louis M. Alberino, Dale F. Regelman, George H. Temme
  • Patent number: 4467083
    Abstract: Copolyamide-imides characterized by thermoplasticity, high heat resistance and high impact resistance are derived by the reaction of 4,4'-methylenebis(phenyl isocyanate), optionally in admixture with a minor amount (up to 10 mole percent) of toluene diisocyanate (2,4-, 2,6-isomers and mixtures), with a mixture of trimellitic acid or anhydride (30-40 mole percent), isophthalic acid (26-44 mole percent) and a C.sub.7-10 aliphatic dicarboxylic acid (balance of 100 mole percent but not greater than 32 mole percent). These polymers are useful as engineering plastics.
    Type: Grant
    Filed: October 3, 1983
    Date of Patent: August 21, 1984
    Assignee: The Upjohn Company
    Inventors: Steven J. Grossman, Kemal Onder
  • Patent number: 4465639
    Abstract: Addition of controlled amounts of water to the reaction mixture produced by phosgenation of a mixture of polymethylene polyphenyl polyamines (and like polyamines produced by condensation of formaldehyde and aromatic amines) prior to complete removal of excess phosgene gives rise to the corresponding polymethylene polyphenyl polyisocyanates having significantly improved properties. Not only is the color of the product, and of polyurethane foams prepared therefrom, significantly lighter but the proportion of higher molecular weight products is significantly less and the viscosity is less. No undesirable by-products are introduced into the polyisocyanate as a result of the process.
    Type: Grant
    Filed: January 26, 1983
    Date of Patent: August 14, 1984
    Assignee: The Upjohn Company
    Inventor: Richard Hatfield, Jr.
  • Patent number: 4448816
    Abstract: Described are compounds characterized by the following formula: ##STR1## wherein C.sub.n H.sub.2n is alkylene from 2 to 12 carbon atoms and C.sub.m H.sub.2m is alkylene from 2 to 20 carbon atoms. Each of the alkylene groups can, optionally, be substituted by inert substituents. The compounds contain a free isocyanato group and a masked isocyanate group, namely, the cyclic urea moiety, which, when the compounds are heated, preferably in the presence of a catalyst, opens to give the group OCN--C.sub.n H.sub.2n --. Thus, the compounds can be reacted via the free isocyanate group with active hydrogen-containing monomers or polymers to form storage stable compositions which, upon heating, are curable via reaction with the cyclic urea group.
    Type: Grant
    Filed: August 4, 1983
    Date of Patent: May 15, 1984
    Assignee: The Upjohn Company
    Inventors: Edward A. Barsa, Philip W. Sherwood
  • Patent number: 4446247
    Abstract: The photopolymerization of ethylenically unsaturated compounds is effected using a combination of an aromatic ketone photosensitizer and a tetrasubstituted urea (e.g. N,N,N',N'-tetramethylurea) or N,N-disubstituted acid amide. Storage stable liquid photoinitiator compositions comprising an aromatic ketone sensitizer (e.g. benzophenone) and a tetrasubstituted urea (e.g. N,N,N',N'-tetramethylurea) are also disclosed. The use of the tetrasubstituted urea or N,N-disubstituted amide possesses advantages (storage stability, lack of discoloration on curing) over photosensitizers such as Michler's ketone which have been used previously in combination with aromatic ketone photosensitizers.
    Type: Grant
    Filed: October 11, 1983
    Date of Patent: May 1, 1984
    Assignee: The Upjohn Company
    Inventor: Anthony F. Jacobine
  • Patent number: 4428897
    Abstract: Particle boards are currently prepared by treating the particles (e.g. wood chips) with a binder comprising an organic polyisocyanate and, optionally, a release agent and then subjecting the treated particles to a molding process involving heat and pressure. The resulting particle board will generally release well from the caul plates of the press after forming. However, it has been found that the ease of release is enhanced, particularly where the wood particles in the board are derived from hardwood, by utilizing a metal selected from magnesium and zinc in the metallic surfaces of the caul plates or platens which come into contact with the particle board during the application of heat and pressure.
    Type: Grant
    Filed: December 23, 1982
    Date of Patent: January 31, 1984
    Assignee: The Upjohn Company
    Inventors: Steven B. Lowenkron, Richard A. Prather, Howard R. Steele
  • Patent number: 4425208
    Abstract: The photopolymerization of ethylenically unsaturated compounds is effected using a combination of an aromatic ketone photosensitizer and a tetrasubstituted urea (e.g. N,N,N',N'-tetramethylurea) or N,N-disubstituted acid amide. Storage stable liquid photoinitiator compositions comprising an aromatic ketone sensitizer (e.g. benzophenone) and a tetrasubstituted urea (e.g. N,N,N',N'-tetramethylurea) are also disclosed. The use of the tetrasubstituted urea or N,N-disubstituted amide possesses advantages (storage stability, lack of discoloration on curing) over photosensitizers such as Michler's ketone which have been used previously in combination with aromatic ketone photosensitizers.
    Type: Grant
    Filed: August 6, 1981
    Date of Patent: January 10, 1984
    Assignee: The Upjohn Company
    Inventor: Anthony F. Jacobine
  • Patent number: 4423204
    Abstract: Novel amorphous copolyamides are provided which are the product of reaction of (A) a lactam, (B) a bisimidazoline, and (C) a dicarboxylic acid, wherein the proportions of reactants based on 100 mole percent are from about 43 to about 82 mole percent of lactam (A) and the remaining 18 to 57 mole percent divided between said (B) and said (C) in substantially equimolar proportions.The copolyamides are characterized by better resistance to elevated temperatures than 100 percent polycaprolactam polyamides but at the same time are easily molded because of their amorphous character.
    Type: Grant
    Filed: September 2, 1982
    Date of Patent: December 27, 1983
    Assignee: The Upjohn Company
    Inventors: Edward A. Barsa, Kemal Onder
  • Patent number: 4420603
    Abstract: A continuous, solvent-free process is described for the preparation of thermoplastic polyamides and polyester-amides by the reaction of the appropriate organic diisocyanate and dicarboxylic acid or difunctional carboxylic acid-terminated polyester.
    Type: Grant
    Filed: September 27, 1982
    Date of Patent: December 13, 1983
    Assignee: The Upjohn Company
    Inventors: Robert G. Nelb, II, Richard W. Oertel, III
  • Patent number: 4420602
    Abstract: A melt-polymerization process is described for the preparation of thermoplastic polyamides and polyesteramides by reaction of the appropriate organic diisocyanate and dicarboxylic acid or difunctional carboxylic acid-terminated polyol. The process, which can be conducted in a batch or continuous manner, comprises the steps of admixing the reactants (preferably in the liquid state), heating the mixed reactants at reaction temperature in a manner such that eliminated carbon dioxide can be vented freely, allowing the reaction to proceed until approximately 25-95 percent (preferably at least 50 percent) of the theoretical carbon dioxide has been eliminated and reducing the resulting intermediate to a powder before completing the reaction by melting, homogenizing, and devolatilizing.
    Type: Grant
    Filed: September 27, 1982
    Date of Patent: December 13, 1983
    Assignee: The Upjohn Company
    Inventors: Henry W. Bonk, Robert G. Nelb, II, Richard W. Oertel, III
  • Patent number: RE31671
    Abstract: Polyurethane polyether-based elastomers are described which are thermoplastic, recyclable and have increased high temperature resistance which permits fabrication by injection molding. The elastomers are the product of reaction of 4,4'-methylenebis(phenyl isocyanate), a particular group of polypropylene oxide-polyethylene oxide block copolymers and an extender [straight chain aliphatic diols C.sub.2-6 or the bis(2-hydroxyethyl ether) of hydroquinone or resorcinol]. The block copolymers have at least 50 percent primary hydroxyl groups, a pH in the range of 4.5 to 9, a content of alkali metal ion less than 25 ppm and a molecular weight of 1000 to 3000. The minimum ethylene oxide (E.O.) residue content (percent by weight) of the polyether for any molecular weight (M.W.) is governed by the equation: ##EQU1## In a particularly preferred embodiment the elastomers are prepared by replacing up to 25 percent by equivalents of the extender by certain diols (polyethylene glycols up to 1500 M.W. preferred).
    Type: Grant
    Filed: February 26, 1981
    Date of Patent: September 11, 1984
    Assignee: The Upjohn Company
    Inventors: Henry W. Bonk, Tilak M. Shah
  • Patent number: RE31703
    Abstract: A process is disclosed for the preparation of liquid, storage-stable, polyisocyanate compositions containing a release agent formed in situ which compositions are useful, for example, as binder resins in the formation of particle boards which latter, because of the presence of the release agent, show no tendency to adhere to the face of metal platens used in their formation. The process comprises heating an organic polyisocyanate (polymethylene polyphenyl polyisocyanate preferred) with an acid phosphate (e.g. a mixture of mono- and di-alkyl acid phosphates) under conditions controlled as to time and temperature so as to yield a product which is storage stable and shows no tendency to deposit solid or to separate into two liquid phases.
    Type: Grant
    Filed: August 2, 1982
    Date of Patent: October 9, 1984
    Assignee: The Upjohn Company
    Inventors: Richard A. Prather, David L. Williams, Robert M. Partin, Warren J. Rabourn, deceased