ISO 1629-2013 pdf free download

ISO 1629-2013 pdf free download.Rubber and latices – Nomenclature Caoutchouc et latex-Nomenclature.
3.3 The NQI group
The Q group is defined by inserting the name of the substituent group on the polymer chain prior to the silicone designation. The following symbols are used:
FMQ silicone rubber having both methyl and fluorine substituent groups on the polymer chain
FVMQ silicone rubber having methyl, vinyl, and fluorine substituent groups on the polymer chain
MQ silicone rubber having only methyl substituent groups on the polymer chain, such as dimethyl polysiloxane
PMQ silicone rubber having both methyl and phenyl substituent groups on the polymer chain
PVMQ silicone rubber having methyl, vinyl, and phenyl substituent groups on the polymer chain
VMQ silicone rubber having both methyl and vinyl substituent groups on the polymer chain
The letter for substituent group(s) on the polymer chain is inserted to the left of the code letter for rubber with silicon and oxygen in the backbone (Q) in descending order of percent present, i.e. largest nearest the
NOTE In ISO 1O43-1,L1 the symbol for silicone polymers is SI.
3.4 The R’ group
3.4.1 Description
The “R” group, in both dry and latex forms, is defined by inserting, before the word “rubber”, the name of the monomer or monomers from which the rubber was prepared (except for natural rubber). The letter preceding the letter ‘R signifies the conjugated diene from which the rubber was prepared (except for natural rubber). Any letter or letters preceding the d iene letter signifies the comonomer or comonomers, substituent groups, or chemical modifications. The designation may be prefixed by the letter “E” and a hyphen to signify an emulsion-polymerized rubber or the letter S and a hyphen to signify a solutionpolymerized rubber.
For latices, the designated symbol is followed by the word latex, e.g. “SBR latex. The symbols given in i4.Z to 3A.4 are used.ISO 1629-2013 pdf free download.