IEC 60455-1:1998 pdf download – Resin based reactive compoundsused for electrical insulation -Part 1: Definitions and general requirements

IEC 60455-1:1998 pdf download – Resin based reactive compoundsused for electrical insulation -Part 1: Definitions and general requirements.
3 Normative references
The following normative documents contain provisions which, through reference In this text. constitutes provisions of this part of IEC 60455 At the lime of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this part of IEC 50455 are encouraged to Investigate the possibility of applying the most recent edition of the normative documents indicated below’). Members of IEC and ISO maintain registers of currently valid international standards.
IEC 60050(2 1 2):1 990, International Electrotechnical Vocabulary (1EV) — Chapter 212: Insulating solids, liquids and gases
IEC 60445-2:1977, Specification for solver,tless polymerisable resinous compounds used for electrical insulation — Part 2: Methods of test
ISO 472:1988, Plastics — Vocabulary
ISO 1043-1:1987, Plastics — Symbols — Part I: Basic polymers and their special characteristics
ISO 1043-2:1988. Plastics — Symbols — Part 2: Fillers and reinforcing materials
ISO 4597-1:1983, Plastics — Hardeners and accelerators lot epoxide resins — Part 1:
Designation
4 Definitions
NOTE — It available, detinilions are taken from lEG 60050(212) or ISO 472, Whet. a more specilic dehnition is required. its wording 5 as c)ose as possible to LbaI given In lEG 800501212) or ISO 472.
reactive compound
intimate admixture of a casting resin with other reactive components such as hardener. accelerator, inhibitor or reactive diluent, and with or without filler and certain additives, whereby virtually no volatile matter is released during the subsequent curing reaction. Reactive
compounds are solvent-free
NOTE — Small quantities 01 by-products may be evolved during cur. ol selected resins. In the case whete lii resinous part at the reactive compound Is diluted by means at a reactive dilueni, small quantities ot nl000me4lc dilueflt may evaporate during cure mainly dL,e to the application conditIons used.
4.2
cured compound
the reactive compound after it is cured. The cured compound is self-supporting
4.3
reactive component
any part of the reactive compound, for example resin, initiator, hardener, accelerator, inhibitor and reactive diluent, that reacts with other components or by chain reaction
4.4
resin
a solid, semi-solid, or pseudo-solid organic material that has an indefinite and ofton high relative molecular mass, exhibits a tendency to flow when subjected to stress, usually has a softening or melting range, and usually fractures conchoidally. In a broad sense, the term 5 used to designate any polymer (halls a basic material for plastics
4.5
acrylic resin (A)
a resin made of acrylic acid or a structural derivative of acrylic acid, or their copotymers with
other monomers, the acrylic monomer(s) being in the greatest amount by mass
4.6
epoxy resin (EP)
a resin containing epoxy groups capable of crosslinking
4.7
polyurethane resin (PUR)
a resin in which, after curing. tt,e repeated structural unit in the chain is of the urethane type
4.8
silicone resin (SI)
a resin in which, after curing, the main polymer chain consists 01 alternating silicon and oxygen
atoms
4-9
unsaturated polyester resin (UP)
a polyester resin characterized by carbon-carbon unsaturation in the polymer chain, which
permits subsequent crosslinking with an unsaturated monomer or prepolymer
4.10
reactive diluent
a low-viscosity liquid, which is added to a high-viscosity solvent-free thermosetling resin and
which reacts chemically with the resin or the hardener during curing
NOTE — Rctive ddueni &Iow th of vCu’?y w,ihvut iriificnt Io* ol uIh, popti.
4.11
hardener
an agent that promotes or regulates the curing reaction of resins by taking part In the reaction
4.12
accelerator
a substance used in a small proportion to increase the reaction rale 01 a reactive compound
4.13
inhibitor
a substance used In a small proportion to suppress a chemical reaction
4.14
filler
a relatively inert solid material added to a reactive compound to modify Its working properties
or other qualities of the uncured compound, or the physical, electrical, chemical or thermal
properties of the cured compound, or to lower cost
4.15
cure; curing
the process of converting the reactive compound into a stable, usable condition by polymerization andior crosslinking.