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Lubricating member for razor cartridges

A razor and component technology, which is applied in the direction of lubricating compositions, toilet preparations, medical preparations containing active ingredients, etc., and can solve problems such as changing the melt viscosity of lubricating components

Pending Publication Date: 2021-12-14
THE GILLETTE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One problem with using thermoplastic celluloses is that they can change the melt viscosity of lubricated components during the extrusion step

Method used

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  • Lubricating member for razor cartridges
  • Lubricating member for razor cartridges
  • Lubricating member for razor cartridges

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment

[0102]

[0103] Suppliers: *Momentive, **Dow Chemicals, ***Ashland, $Dow Corning, #Sonnenborn

[0104] Formulation Examples 1 to 4 were prepared as follows :

[0105] 1. Disinfect all equipment

[0106] 2. Open the water bath / vessel jacket to 75°C

[0107] 3. Add lipophilic structurant (cetyl or stearyl alcohol, lauric acid) and stir with an overhead stirrer until completely melted

[0108] 4. Add oil phase ingredients (Silwet, petroleum jelly) and mix until completely liquid

[0109] 5. Cool down to 60°C and add powder ingredients (Polyox, Cekol) until fully dispersed.

[0110] 6. Pour the mixture into molds or containers

[0111] 7. Assemble the parts to the razor cartridge

[0112]

[0113] Suppliers: *Dupont, **Dow Chemicals, ***Perstorp

preparation Embodiment 5

[0114] Formulation Example 5 is prepared as follows :

[0115] The lubricating member of the present invention is prepared by extrusion or another high temperature process such as injection molding, compression molding, compaction, ultrasonic or radio frequency sintering, and slot coating. High temperature treatment degrades / breaks down water soluble polymers (PEO) along with additional benefit ingredients. In one embodiment utilizing EVA grade Elvax 660 (available from Dupont) in the lubricating member, the extrusion process temperature was reduced to 110°C. In one embodiment, a lubricious member comprising a thermoelastic skin care active may also be coated or laminated with another lubricious member. In one embodiment, all components of the bar including the mixture of high molecular weight PEO and low molecular weight PEO may be blended alone or in combination with other ingredients prior to molding or extrusion. It may be preferred that the components are free-flowing...

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Abstract

The invention relates to a lubricating member for a razor cartridge having a lubricating member comprising a carboxymethyl cellulose. The razor comprises: a. a housing having a lubricating surface; b. at least one blade with a blade tip, wherein said blade tip is exposed on said lubricating surface of the housing; c. a lubricating member positioned on the lubricating surface of said housing, said lubricating member comprising a lubricating material comprising a mixture of a polyethylene oxide and a carboxymethyl cellulose, wherein said carboxymethyl cellulose forms at least one discreet particle.

Description

Background technique [0001] The use of shaving aids on razor blades to provide lubrication benefits during shaving is known, see for example US7,121,754, US6,298,558, US5,711,076, US5,134,775, US6,301,785, US 2006 / 0225285, US2016 / 0143836A1, US2018 / 0133139A1 and US2017 / 0002288A1. [0002] Such shaving aids generally comprise a water-insoluble base material that provides structural integrity, and a water-soluble polymer such as polyethylene oxide (polyox), so that once the water-soluble polymer forms a solution with the water present during shaving, the Provides lubrication during shaving. Since the introduction of polyox as a shaving lubricant, there has been little development in this field, if not without limitations, for polyethylene oxide polymers. [0003] For example, the use of polyethylene oxide polymers having low or high molecular weight may improve lubrication, but may also result in impairments with respect to residue and / or fibrous or other aspects of the aqueous...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/73A61K8/86A61Q9/02B26B21/44A61K8/02C10M169/04
CPCA61K8/731A61K8/86A61K2800/594A61Q9/02B26B21/443A61K8/0241C10N2020/04C10N2020/06C10N2040/50C10M2209/1045C10M2209/105C10M2209/12C10M2229/02C10M145/00A61K8/342A61K8/894A61K8/92A61K2800/87
Inventor A·F·史蒂芬森J·K·斯普纳-弗莱明
Owner THE GILLETTE CO