Number

079-EN

Section

General Section

Use

Abstract

This document describes a process for protecting, preserving and renewing surfaces, especially rubber and other natural and synthetic polymers including wood, leather, painted surfaces and metal. The material to be treated is soaked with an aqueous solution of substituted or unsubstituted dimethylpolysiloxane. This is done in several stages with other solutions such as diethylene glycol and/or glycerine. This treatment reduces the impact of deleterious effects such as ozone, ultraviolet radiation and environmental causes to the appearance of especially rubber parts used for example in automobiles.

Substituted substances

Alternative Substances

Reliability of information

Internet information: data are from an internet document and only a basic and partial evaluation could be performed

Reason substitution

CMR
physical hazards

Hazard Assessment

Substances to be substituted: Lamp black or carbon black is possibly carcinogenic to humans (Group 2B), according to the IARC Monographs. It fulfils the criteria to be listed in the Substance Database according to SUBSPORTplus Screening Criteria (SDSC). Alternative substances: Dimethylpolysiloxane is not listed in the SUBSPORTplus Database and has no harmonised classification according to Annex VI of Regulation (EC) No 1272/2008 (CLP Regulation). Diethylene glycol is not listed in the SUBSPORTplus Database. » Check the Substance Database according to SUBSPORTplus Screening Criteria (SDSC)

Description of Substitution

This document is based on a patent registration filed in 1979. Since the right to the patent has expired and there are no other patent relatives the invention is free to use. The invention comprises a composition which protects natural and synthetic polymer and rubber from the deleterious effects of ozone, ultraviolet radiation, dirt and other environmental sources of degradation. This process is called scission in rubber and is the process which makes the material crack. The formulation can also be used on wood and leather. The formulation is an alternative to carbon black, a substance derived from petroleum products which is used much in the same way. Carbon black is however a suspected carcinogen according to IARC and can be corrosive to metal and painted surfaces making it impractical to use on e.g. tires on automobiles. The composition itself comprises water, an organopolysiloxane and at least one polyol compound such as glycerine or diethylene glycol. In order to preserve and renew the surfaces, the composition is first allowed to thoroughly wet the surface. This wetting continues for about 24 hours or until the surface has completely penetrated the surface layer of the substrate. This step should then be repeated at least once but preferably two more times. Alcohol and other soil solvents can also be added as cleaners to the composition. For further information about the specifics of the recipe or the mechanism of action please consult the original document which is provided later in this case study.

Case/substitution evaluation

Carbon black is a potential carcinogen and could therefore be a health hazard in its application on rubber and polymers. The substitution presented here could be a safer alternative provided that diethylene glycol is handled carefully. However, since the document is only a patent registration, a full assessment could not be performed.

State of implementation

Pilot study

Availability ofAlternative

All alternatives are available on the market.

Type of information supplier

Producer / distributor

Contact

Swedish Patent and Registration office www.prv.se

Type of publication and availability

Freely available

Publication source: author, company, institute, year

The document is a patent application. Applicant: Palcher, Joseph J. International Publication Number: CA 1050705 Year: 20 March, 1979

Date, reviewed

December 11, 2020