Patents by Inventor Gerd H. Dahms
Gerd H. Dahms 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).
-
Patent number: 8623809Abstract: The invention relates to pumpable aqueous pearlescent concentrates having a high active content of alkyl sulfates, alkyl ether sulfates, alkyl sulfonates, mono and diesters of sulfosuccinic acid (sulfosuccinates), alkyl glycinates, alkyl sarcosinates, and/or alkyl taurates, and fatty acid glycol esters and/or carbolic acid amides as pearlescent agents, and to a method for the production thereof. The pearlescent concentrates according to the invention are suitable as additives for improving the optical appearance of tenside components, for example of liquid washing and cleaning agents or liquid body wash and body care agents and hair care agents.Type: GrantFiled: August 27, 2010Date of Patent: January 7, 2014Assignee: OTC GmbHInventors: Gerd H. Dahms, Andreas H. Jung
-
Publication number: 20120149629Abstract: The invention relates to pumpable aqueous pearlescent concentrates having a high active content of alkyl sulfates, alkyl ether sulfates, alkyl sulfonates, mono and diesters of sulfosuccinic acid (sulfosuccinates), alkyl glycinates, alkyl sarcosinates, and/or alkyl taurates, and fatty acid glycol esters and/or carbolic acid amides as pearlescent agents, and to a method for the production thereof. The pearlescent concentrates according to the invention are suitable as additives for improving the optical appearance of tenside components, for example of liquid washing and cleaning agents or liquid body wash and body care agents and hair care agents.Type: ApplicationFiled: August 27, 2010Publication date: June 14, 2012Applicant: OTC GMBHInventors: Gerd H. Dahms, Andreas H. Jung
-
Patent number: 7393817Abstract: The subject invention relates to surfactant compositions of gemini surfactants and co-amphiphile(s), to a process for preparing such compositions, and to their uses, especially as emulsifiers and dispersants.Type: GrantFiled: March 10, 2004Date of Patent: July 1, 2008Assignee: Sasol Germany GmbHInventors: Klaus Kwetkat, Gerd H. Dahms
-
Publication number: 20040176266Abstract: The subject invention relates to surfactant compositions of gemini surfactants and co-amphiphile(s), to a process for preparing such compositions, and to their uses, especially as emulsifiers and dispersants.Type: ApplicationFiled: March 10, 2004Publication date: September 9, 2004Inventors: Klaus Kwetkat, Gerd H. Dahms
-
Patent number: 6710022Abstract: The subject invention relates to surfactant compositions of gemini surfactants and co-amphiphile(s), to a process for preparing such compositions, and to their uses, especially as emulsifiers and dispersants.Type: GrantFiled: August 13, 2001Date of Patent: March 23, 2004Assignee: Sasol Germany GmbHInventors: Klaus Kwetkat, Gerd H. Dahms
-
Publication number: 20040033913Abstract: This invention relates to aqueous, flowable pearly luster concentrates containing one or more pearlescent component(s), gemini surfactant(s), and at least one additional surfactant.Type: ApplicationFiled: May 28, 2003Publication date: February 19, 2004Inventors: Gerd H Dahms, Klaus Kwetkat
-
Publication number: 20030202948Abstract: O/W emulsions, contain at least one organosilicon compound bearing a glycoside radical and at least one metal oxide are present. The emulsions are stable with respect to pH and exhibit a high degree of dispersion of the metal oxide. The emulsions are particularly useful as cosmetic formulations, in particular as sun screen lotions and creams.Type: ApplicationFiled: March 20, 2003Publication date: October 30, 2003Applicant: Wacker-Chemie GmbHInventors: Thomas Koini, Gerd H. Dahms
-
Patent number: 6171600Abstract: The stable multiple emulsion of the X/O/Y type contains at least one X/O phase in which X is an oil-immiscible component and O an oil phase. The X/O phase can contains an active substance, possibly in solid form, for example for medical, cosmetic or technical applications. The Y phase can be an aqueous phase, an aqueous liquid, preferably liquid-crystalline, gel or a W/O/W emulsion and serves as carrier for the at least one X/O phase. The X/O phase is produced using an emulsifier that has an HLB value equal to or less than 6 and/or is a W/O emulsifier. The preparation of the X/O phase itself and its diffusion in the Y phase are done with standard stirring tools. The drops of the X/O phase have long-term stability and, even when greatly diluted, do not interact with the Y phase or the drops or other X/O phases dispersed therein.Type: GrantFiled: May 23, 1997Date of Patent: January 9, 2001Assignee: IFAC GmbHInventor: Gerd H. Dahms
-
Patent number: 6034172Abstract: The invention relates to emulsifier mixtures for preparing water-soluble polymers by inverse emulsion polymerization of corresponding monomers or monomer mixtures, to a process for preparing the water-soluble polymers, and to the monomer/water-in-oil emulsions thus obtained. The emulsifier mixture comprises glycerol monooleate and one or more diacetyltartrates of fatty acid glyceride.Type: GrantFiled: December 21, 1998Date of Patent: March 7, 2000Assignee: Th. Goldschmidt AGInventors: Felix Muller, Gerd H. Dahms
-
Patent number: 5911981Abstract: Surfactant blends that generate a stable spherical foam are disclosed. The surfactant blends contain a nonionic surfactant or an amphoteric surfactant as the principal foaming agent, and a sufficient amount of an acylate lactylate to enhance foam volume and provide a foam that remains in a spherical form for up to about forty minutes. A method of generating a long-lasting foam also is disclosed.Type: GrantFiled: October 24, 1997Date of Patent: June 15, 1999Assignee: R.I.T.A. CorporationInventors: Gerd H. Dahms, James W. Cook
-
Patent number: 5744062Abstract: Balanced emulsifier blends that provide a stable oil-in-water emulsion of preselected viscosity are disclosed. The emulsifier blend contains an acyl lactylate as the primary emulsifier and a nonionic surfactant as the coemulsifier. A method of preparing an oil-in-water emulsion having a preselected viscosity also is disclosed.Type: GrantFiled: August 29, 1996Date of Patent: April 28, 1998Assignee: R.I.T.A. CorporationInventors: Gerd H. Dahms, James W. Cook
-
Patent number: 5674475Abstract: Emulsifier composition is a mixture of polyglycerol fatty acid ester (n.gtoreq.4) and the lactylate of a fatty acid (C.gtoreq.8) or its salt and is used to manufacture a wide range of different O/W emulsions, e.g. sunscreen emulsions for cosmetics. The polyglycerol fatty acid ester preferably has an HLB value.ltoreq.8. The emulsifier composition can additionally contain a lipophilic emulsifier.Type: GrantFiled: April 7, 1995Date of Patent: October 7, 1997Assignees: IFAC GmbH, Nikko Chemicals Co., Ltd.Inventors: Gerd H. Dahms, Masato Tagawa
-
Patent number: 5603863Abstract: The invention concerns a process for producing a water-in-oil emulsion comprising mixing an oil dispersion of particles of a metallic oxide having a primary particle size less than 0.2 micron with one or more emulsifiers and an aqueous phase.The method enables the production of such emulsions containing relatively small quantities of emulsifiers and a novel emulsion made available by the invention contains less than 1% by weight of emulsifiers, 10 to 60% by weight of an oil phase and at least 40% by weight of an aqueous phase.The emulsions so formed are useful in preparing UV absorbing compositions such as sunscreens, skin protectants, moisturisers and after-sun lotions.Type: GrantFiled: May 30, 1995Date of Patent: February 18, 1997Assignee: Tioxide Specialties LimitedInventor: Gerd H. Dahms
-
Patent number: 5543135Abstract: The invention concerns a process for producing a water-in-oil emulsion comprising mixing an oil dispersion of particles of a metallic oxide having a primary particle size less than 0.2 micron with one or more emulsifiers and an aqueous phase.The method enables the production of such emulsions containing relatively small quantities of emulsifiers and a novel emulsion made available by the invention contains less than 1% by weight of emulsifiers, 10 to 60% by weight of an oil phase and at least 40% by weight of an aqueous phase.The emulsions so formed are useful in preparing UV absorbing compositions such as sunscreens, skin protectants, moisturizers and after-sun lotions.Type: GrantFiled: March 1, 1993Date of Patent: August 6, 1996Assignee: Tioxide Specialties LimitedInventor: Gerd H. Dahms
-
Patent number: 5516457Abstract: An oil-in-water emulsion containing 0.5% to 30% metallic oxides having a particle size of less than 0.2 micron, less than 10% total emulsifier, 5% to 30% of an oil phase and at least 60% of an aqueous phase is provided. The invention also makes available a method of preparing such emulsions in which the emulsion is formed by use of a dispersion in water of the metallic oxide particles. By comparison with previously known emulsions of this type relatively small quantities of emulsifiers are used and it is possible to use an emulsion system with a low HLB value (e.g. less than 6). Preferably no hydrophilic emulsifiers are used. The emulsions are suitable for preparing UV-absorbing compositions such as sunscreens, moisturisers and after-sun lotions. The ability to use no, or little, hydrophilic emulsifiers is advantageous since, in, general, these emulsifiers are not biodegradable whereas hydrophobic emulsifiers generally are biodegradable.Type: GrantFiled: July 17, 1995Date of Patent: May 14, 1996Assignee: Tioxide Specialties LimitedInventor: Gerd H. Dahms
-
Patent number: 5443759Abstract: An oil-in-water emulsion containing 0.5% to 30% metallic oxides having a particle size of less than 0.2 micron, less than 10% total emulsifier, 5% to 30% of an oil phase and at least 60% of an aqueous phase is provided.The invention also makes available a method of preparing such emulsions in which the emulsion is formed by use of a dispersion in water of the metallic oxide particles.By comparison with previously known emulsions of this type relatively small quantities of emulsifiers are used and it is possible to use an emulsion system with a low HLB value (e.g. less than 6). Preferably no hydrophilic emulsifiers are used.The emulsions are suitable for preparing UV-absorbing compositions such as sunscreens, moisturizers and after-sun lotions. The ability to use no, or little, hydrophilic emulsifiers is advantageous since, in, general, these emulsifiers are not biodegradable whereas hydrophobic emulsifiers generally are biodegradable.Type: GrantFiled: March 1, 1993Date of Patent: August 22, 1995Assignee: Tioxide Specialties LimitedInventor: Gerd H. Dahms