Patents Assigned to Hercules
  • Patent number: 5419998
    Abstract: In an aqueous-developable dry-film photoresist containing a carboxyl-group containing film-forming polymeric binder, the improvement wherein the binder is obtained by polymerizing a mixture including: (a) a monomer of the formula H.sub.2 C.dbd.CRCOO[(C.sub.n H.sub.2n)X(C.sub.p H.sub.2p)].sub.m R', wherein R is hydrogen or methyl and R' is a saturated or unsaturated C.sub.5 -C.sub.12 bridged alkyl optionally substituted by at least one C.sub.1 -C.sub.4 alkyl or halogen, X is oxygen or sulfur, n is 2-4, p is 0-4, m is 0-2; and (b) at least one C.sub.3 -C.sub.15 .alpha.,.beta.-unsaturated carboxyl-containing monomer having 3-15 carbon atoms.
    Type: Grant
    Filed: July 25, 1994
    Date of Patent: May 30, 1995
    Assignee: Hercules Incorporated
    Inventors: Richard T. Mayes, Rudolph L. Pohl
  • Patent number: 5415972
    Abstract: An aqueous-developable dry-film photopolymerizable composition is disclosed wherein the photopolymerizable composition contains a carboxyl-containing polyurethane having at least one ethylenically unsaturated end group as a plasticizer.
    Type: Grant
    Filed: September 12, 1994
    Date of Patent: May 16, 1995
    Assignee: Hercules Incorporated
    Inventor: Richard T. Mayes
  • Patent number: 5411693
    Abstract: Process and apparatus for high speed spinning of multi-component polymer filaments by providing a high face velocity quench unit near the lower surface of one or more high hole surface density spinnerettes to prevent slubs and marrying of the molten filaments.
    Type: Grant
    Filed: January 5, 1994
    Date of Patent: May 2, 1995
    Assignee: Hercules Incorporated
    Inventor: Carl J. Wust, Jr.
  • Patent number: 5412055
    Abstract: Disclosed are organosilicon crosslinked polymers and crosslinkable prepolymers that are the reaction product of (a) a cyclic polysiloxane in which each silicon atom is substituted with (i) a saturated, substituted or unsubstituted alkyl or alkoxy group or a substituded or unsubstituted aryl or aryloxy group, and (ii) a substituted or unsubstituted hydrocarbon group having at least one carbon-carbon double bond that is reactive in hydrosilation, (b) at least one organosilicon compound having at least two .tbd.SiH groups, and optionally (c) a hydrocarbon polyene having at least two nonaromatic carbon-carbon double bonds that are reactive in hydrosilation. A process for preparing the polymers and prepolymers and for preparing the cyclic polysiloxanes is also disclosed.
    Type: Grant
    Filed: April 18, 1994
    Date of Patent: May 2, 1995
    Assignee: Hercules Incoporated
    Inventor: De-Kai Loo
  • Patent number: 5403426
    Abstract: A method for preparing hydrophobic fiber for processing, inclusive of crimping, cutting, carding, compiling and bonding, without substantial loss in hydrophobic properties in the finished staple or corresponding nonwoven product through initial application of a surface modifier component comprising one or more of a class of water soluble compounds substantially free of lipophilic end groups and of low or limited surfactant properties.
    Type: Grant
    Filed: September 2, 1993
    Date of Patent: April 4, 1995
    Assignee: Hercules Incorporated
    Inventors: Roger W. Johnson, Thomas W. Theyson
  • Patent number: 5393812
    Abstract: A flame retardant, light stable composition, prepared from a polyolefin, a halogenated hydrocarbyl phosphate or phosphonate ester flame retardant, and an alkoxyamine functional hindered amine light stabilizer. Suitable forms, in which the composition may be provided, include fibers, and fabrics prepared from such fibers.
    Type: Grant
    Filed: August 31, 1993
    Date of Patent: February 28, 1995
    Assignee: Hercules Incorporated
    Inventors: Charla S. Haley, William L. Sanchez
  • Patent number: 5393338
    Abstract: This invention generally provides a class of novel cationic resin comprised of a cross-linked polyamine having pendant tertiary and/or quaternary amine groups linked to amine groups in said polyamine by a hydrocarbon chain including a hydroxyl group in the .beta.-position with respect to the polyamine chain. In general, these resins can comprise the reaction product of a polyamine having secondary amine groups, a crosslinking agent, and a cationizing agent having an epoxide group and a tertiary or quaternary amine (quaternary ammonium) group. These cationic resins have been found to be useful for a variety of operations in the manufacture of paper and paperboard, especially as drainage aids and stabilizers for dispersed rosin sizing agents.
    Type: Grant
    Filed: December 30, 1992
    Date of Patent: February 28, 1995
    Assignee: Hercules Incorporated
    Inventors: Ian A. Pudney, Brian M. Stubbs, Malcolm J. Welch
  • Patent number: 5391670
    Abstract: The alkylation resins of this invention comprise the alkylation reaction product of (a) at least one substituted or unsubstituted polycyclic aromatic compound and (b) at least one ethylenically unsaturated hydrocarbon monomer having at least two carbon-carbon double bonds that reacts with the polycyclic aromatic compound by alkylation in the presence of an acid catalyst, wherein the ratio of (a) to (b) in the resin is about 1:9 to about 3:1 by weight. The resins have a weight average molecular weight of less than 10,000 measured by size exclusion chromatography, and a Ring & Ball softening point of about 50.degree. to about 250.degree. C. Because of their high softening point and low molecular weight, the resins are useful in a variety of applications such as flow rate modifiers for engineering polymers, tackifiers for adhesives, and flushing agents for inks.
    Type: Grant
    Filed: August 9, 1993
    Date of Patent: February 21, 1995
    Assignee: Hercules Incorporated
    Inventors: Atanu Biswas, Daniel W. Klosiewicz
  • Patent number: 5391678
    Abstract: Curable compositions including epoxy-functional compounds and polyenes, as well as cyclic polysiloxanes, and/or tetrahedral siloxysilanes, and/or linear polysiloxanes; along with, or instead of these polyenes and silicon compositions, crosslinkable prepolymers prepared from such polyenes and silicon compounds may be included. A curing agent, and yet additionally, a curing accelerator, may also be included. These compositions can be thermally cured, in the presence of hydrosilation catalysts.
    Type: Grant
    Filed: December 3, 1992
    Date of Patent: February 21, 1995
    Assignee: Hercules Incorporated
    Inventors: John K. Bard, Richard L. Brady, Raymond T. Leibfried, Sr., Dekai Loo
  • Patent number: 5389285
    Abstract: Liquid crystal coupled dichroic dye compositions comprising a dichroic dye moiety coupled to one or two liquid crystal moieties by a flexible spacer group having at least four atoms linked in a linear fashion; guest-host compositions comprising such liquid crystal coupled dichroic dye compositions dissolved in liquid crystal hosts and devices comprising such guest-host compositions; and liquid crystal coupled aromatic amines useful for forming the liquid crystal coupled dichroic dyes, are disclosed.
    Type: Grant
    Filed: December 11, 1989
    Date of Patent: February 14, 1995
    Assignee: Hercules Incorporated
    Inventors: Paul J. Shannon, Brian J. Swetlin
  • Patent number: 5387295
    Abstract: Stabilizers for isocyanate cross-linked composite modified double base propellants are provided. These stabilizers have good solubilities in the propellant matrices and have good stabilization properties. The stabilizers of this invention are compounds of the formula: ##STR1## wherein R.sub.1 is selected from the group consisting of: ##STR2## wherein R.sub.2 is a straight or branched chain alkene radical having 1 to 3 carbon atoms, R.sub.3 is a straight or branched chain alkyl radical having 1 to 3 carbon atoms, n is an integer from 1-3, m is an integer from 1-3, and y is an integer from 1-3.
    Type: Grant
    Filed: January 5, 1977
    Date of Patent: February 7, 1995
    Assignee: Hercules Incorporated
    Inventor: James D. Gibson
  • Patent number: 5381735
    Abstract: Release of a resin mold from a photopolymeric mold is enhanced by using an unsaturated fatty acid ester release agent in the photopolymeric composition. In addition to providing quick release of the resin mold, the incorporation of the unsaturated fatty acid ester improves the flexibility of the photopolymeric mold without sacrificing tensile strength or hardness. The resin mold is used to fabricate rubber plates for ink printing.
    Type: Grant
    Filed: October 26, 1992
    Date of Patent: January 17, 1995
    Assignee: Hercules Incorporated
    Inventor: Charles C. Fifield
  • Patent number: 5373077
    Abstract: Disclosed are organosilicon crosslinked polymers and crosslinkable prepolymers that are the reaction product of (a) a cyclic polysiloxane in which each silicon atom is substituted with (i) a saturated, substituted or unsubstituted alkyl or alkoxy group or a substituted or unsubstituted aryl or aryloxy group, and (ii) a substituted or unsubstituted hydrocarbon group having at least one carbon-carbon double bond that is reactive in hydrosilation, (b) at least one organosilicon compound having at least two .tbd.SiH groups, and optionally (c) a hydrocarbon polyene having at least two nonaromatic carbon-carbon double bonds that are reactive in hydrosilation. A process for preparing the polymers and prepolymers and for preparing the cyclic polysiloxanes is also disclosed.
    Type: Grant
    Filed: April 18, 1994
    Date of Patent: December 13, 1994
    Assignee: Hercules Incorporated
    Inventor: De-Kai Loo
  • Patent number: 5371305
    Abstract: The present invention provides in a particular embodiment an improvement in the process for producing phenol by the acid-catalyzed cleavage of cumene hydroperoxide (CHP). The reactant stream fed to the cleavage reactor also includes the contaminant by-product dimethyl benzyl alcohol (DMBA) formed during the direct oxidation of cumene to CHP. This contaminant DMBA further reacts in the cleavage reactor to reduce the yield of phenol and produce undesirable and unreclaimable by-products. The improvement provided herein comprises performing the cleavage reaction at a reduced residence time of generally from one-half to five minutes, whereby the formation of .alpha.-methyl styrene from DMBA is promoted and the formation of the undesirable and unreclaimable by-products is reduced; .alpha.-methyl styrene is not only a useful by-product, but can be recycled and hydrogenated to the cumene starting material.
    Type: Grant
    Filed: December 31, 1992
    Date of Patent: December 6, 1994
    Assignee: Hercules Incorporated
    Inventor: Horace E. Hood
  • Patent number: 5360840
    Abstract: Epoxy resin compositions having improved storage stability before curing and improved thermal and mechanical performance after curing comprise a mixture of a polyepoxide and a curing agent that is reactive with the polyepoxide. The epoxy resin composition is characterized by a glass transition temperature of less than 20.degree. C., measured under standard conditions, after subjecting the epoxy resin composition to a specified thermal cycle. The preferred curing agents are aromatic diamines, for example, 3,7-diaminodibenzothiophene-5,5-dioxide; 3,7-diaminophenothiazine sulfone, 3,7-diamino-N-methylphenothiazine sulfone; 2,7-diamino-9-fluorenone and 2,4,6,8-tetramethyl-3,7-diaminothioxanthene sulfone.
    Type: Grant
    Filed: December 29, 1992
    Date of Patent: November 1, 1994
    Assignee: Hercules Incorporated
    Inventors: Anita N. Chan, Brian J. Swetlin, Samuel A. Thompson, III, Chester R. Willis, Andrew B. Woodside
  • Patent number: 5348605
    Abstract: Photopolymer platemaking apparatus comprises a tilting bucket assembly comprising a tilting bucket having a lip, a substantially vertical wall associated with the tilting bucket, and positioning means for maintaining the lip in contact with a substantially vertical wall during tilting of the tilting bucket from an upright position to a pre-pouring position, and for separating the lip from the substantially vertical wall as the tilting bucket tilts from the pre-pouring position to a pouring position. Preferably, the positioning means additionally moves the tilting bucket from the pouring position to the post-pouring position, and from the post-pouring position to the upright position, and maintains the lip in contact with the substantially vertical wall during movement of the tilting bucket from the post-pouring position to the upright position.
    Type: Grant
    Filed: September 15, 1993
    Date of Patent: September 20, 1994
    Assignee: Hercules Incorporated
    Inventors: Norman E. Hughes, Richard B. Schroeder
  • Patent number: 5348596
    Abstract: A solid propellant composition comprising an oxidizer, a fuel and a binder, wherein the binder comprises, based on the weight of the total propellant composition:(a) from about 3 to about 12% of a non-crystalline polyether having a molecular weight of from about 1000 to about 9,000, and(b) from about 1 to about 12% of an inert plasticizer. Propellants of this invention can be used, for example, in ground-launched interceptors, air launched tactical motors, and space boosters.
    Type: Grant
    Filed: August 25, 1989
    Date of Patent: September 20, 1994
    Assignee: Hercules Incorporated
    Inventors: John R. Goleniewski, James A. Roberts
  • Patent number: 5341799
    Abstract: A urethane polymer having free acidic groups on the backbone of the polymer and terminal (meth)acrylate groups is prepared by (1) reacting a mixture comprising an aliphatic diol and a diol having acidic functionality with an excess of an aliphatic, cycloaliphatic or aromatic diisocyanate in the presence of a catalyst to produce an isocyanate-terminated urethane polymer and (2) reacting the terminal isocyanate groups of the product of step (1) with a mono- or dihydroxy (meth)acrylate. The diol comprises greater than 50% of the reaction mixture, based on the total weight of reactants. The polymer can be used in photopolymerizable compositions for making low tack flexographic printing plates and photopolymer masters.
    Type: Grant
    Filed: December 23, 1991
    Date of Patent: August 30, 1994
    Assignee: Hercules Incorporated
    Inventors: Charles C. Fifield, Rudolph L. Pohl, Wako Yokoyama
  • Patent number: H1388
    Abstract: A polyolefin composition comprises repeating units of a metathesis polymerizable olefin monomer, a metathesis polymerization procatalyst, a metathesis polymerization procatalyst activator, and at least one member selected from the group consisting of: (i) a Lewis acid catalyst and a Lewis acid cocatalyst, effective to obtain a residual metathesis polymerizable olefin monomer level of from 0 to 0.25 weight percent, based on the weight of the polyolefin; (ii) an anionic polymerization catalyst; (iii) a free radical polymerization initiator; and (iv) a hydrosilation polymerization catalyst. The method for making the composition is also disclosed. The use of metathesis polymerization in conjunction with another type of polymerization can achieve a variety of beneficial effects, including a very low level of residual metathesis polymerizable monomer.
    Type: Grant
    Filed: December 23, 1992
    Date of Patent: December 6, 1994
    Assignee: Hercules Incorporated
    Inventor: Albert S. Matlack
  • Patent number: RE34904
    Abstract: Cellulose ethers are disclosed which have sufficient nonionic substitution to render them water soluble and which are further modified with a C.sub.10 to C.sub.24 long chain alkylaryl group in an amount between 0.2% by weight and the amount which makes them less than 1% by weight soluble in water. Hydroxyethylcellulose is a preferred water soluble cellulose ether for modification according to the invention. These products exhibit substantially improved viscosifying effects compared to their unmodified cellulose ether counterparts, and provide good leveling and sag resistance in latex paints. Preferred alkylaryl groups are nonylphenyl, dodecylphenyl, and dinonylphenyl. Included are cellulose ethers with spacer groups of various lengths between the alkylaryl group and the connecting group to the cellulose molecule.
    Type: Grant
    Filed: July 8, 1993
    Date of Patent: April 11, 1995
    Assignee: Hercules Incorporated
    Inventors: Ernst K. Just, Thomas G. Majewicz, Arjun C. Sau