ASTM D1636-99(2004)e1
(Specification)Standard Specification for Allyl Molding Compounds
Standard Specification for Allyl Molding Compounds
ABSTRACT
This specification provides for the identification of three types of allyl molding compounds, based on the general type of filler employed in their manufacture: Type I - High-strength materials, glass-fiber reinforced; Type II - General-purpose mineral filled; and Type III - General-purpose synthetic fiber filler. Types I and II may be subdivided into four classes according to resin composition and use as follows: Class A - Diallyl ortho-phthalate resin, nonflame-retardant; Class B - Diallyl ortho-phthalate resin, flame-retardant; Class C - Diallyl meta-phthalate resin nonflame-retardant; and Class D - Diallyl meta-phthalate resin, flame-retardant. Materials shall be compression molded, conditioned, and tested; and the individual grades shall conform to specified values of impact resistance, flexural strength, permittivity and dissipation factor, insulation resistance, flame resistance, and oxygen index.
SCOPE
1.1 This specification covers compression molding thermosetting compounds consisting of allyl resins that have been combined with filler, pigments, and dyes as required, to obtain specific properties desired.
1.2 The values stated in SI units are to be regarded as the standard. The values in parentheses are given for information only. Note 1-The properties included in this specification are those required to identify the molding compounds covered. There may be other requirements necessary to identify particular characteristics. These will be added to the specification as their inclusion becomes generally desirable and the necessary test data and methods become available.
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Designation:D1636 −99(Reapproved 2004)
Standard Specification for
Allyl Molding Compounds
This standard is issued under the fixed designation D1636; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
´ NOTE—Editorially removed reference to MIL-STD-105 in Section 2 in October 2004.
1. Scope* 3. Classification
1.1 This specification covers compression molding,
3.1 This specification provides for the identification of three
thermosetting, allyl compounds as further defined in Section 3. typesofallylmoldingcompounds,basedonthegeneraltypeof
filler employed in their manufacture, which shall be distin-
1.2 The values stated in SI units are to be regarded as the
guished by the requirements prescribed in Table 1.
standard.Thevaluesinbracketsaregivenforinformationonly.
Type I—High-strength materials, glass-fiber reinforced.
NOTE1—Thepropertiesincludedinthisspecificationarethoserequired
Type II—General-purpose mineral filled.
to identify the molding compounds covered. There may be other require-
Type III—General-purpose synthetic fiber filler.
ments necessary to identify particular characteristics. These will be added
to the specification as their inclusion becomes generally desirable and the
3.2 Types I and II may be subdivided into four classes
necessary test data and methods become available.
according to resin composition and use as follows:
NOTE 2—There is no similar or equivalent ISO standard.
Class A—Diallyl ortho-phthalate resin, nonflame-retardant.
Class B—Diallyl ortho-phthalate resin, flame-retardant.
2. Referenced Documents
2 Class C—Diallyl meta-phthalate resin nonflame-retardant.
2.1 ASTM Standards:
Class D—Diallyl meta-phthalate resin, flame-retardant.
D150 Test Methods forAC Loss Characteristics and Permit-
tivity (Dielectric Constant) of Solid Electrical Insulation
3.3 The four classes of Type I are subdivided as follows:
D229 Test Methods for Rigid Sheet and Plate Materials ClassesA, B, C, and D into four grades. ForType II each of the
Used for Electrical Insulation
four classes is subdivided into two grades. For Type III only
D256 Test Methods for Determining the Izod Pendulum Class A compounds are produced and are available in three
Impact Resistance of Plastics grades.
D257 Test Methods for DC Resistance or Conductance of
Insulating Materials
4. General Requirements
D618 Practice for Conditioning Plastics for Testing
4.1 Themoldingcompoundshallbeofuniformcomposition
D790 Test Methods for Flexural Properties of Unreinforced
and so compounded as to conform to the requirements of this
and Reinforced Plastics and Electrical Insulating Materi-
specification.
als
4.2 Although other than allyl resin may be added for flame
D2863 Test Method for Measuring the Minimum Oxygen
resistance and other purposes, the major part of the resin
Concentration to Support Candle-Like Combustion of
portion shall be diallyl ortho-phthalate or diallyl meta-
Plastics (Oxygen Index)
phthalate.
D3892 Practice for Packaging/Packing of Plastics
D5224 PracticeforCompressionMoldingTestSpecimensof
4.3 The apparent density, bulk factor, particle size, physical
Thermosetting Molding Compounds
form, and color of the compounds shall be as agreed upon
between the purchaser and supplier.
This specification is under the jurisdiction of ASTM Committee D20 on
5. Detail Requirements
Plastics and is the direct responsibility of Subcommittee D20.16 on Thermosetting
Materials.
5.1 Average results obtained on test specimens, each
Current edition approved October 1, 2004. Published January 2005. Originally
compression-molded using the manufacturer’s recommended
approved in 1959. Last previous edition approved in 1999 as D1636 - 99. DOI:
techniques, shall conform to the requirements listed in Table 2.
10.1520/D1636-99R04E01.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
6. Sampling
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. 6.1 Adequate statistical sampling shall be used.
*A Summary of Changes section appears at the end of this standard
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D1636−99 (2004)
TABLE 1 Types, Classes, and Grades of Allyl Molding
Methods D257. Cut two sections from the disk so that the
Compounds
section under test is similar to the figure cited above. Scrub
Type Class Grade Description
with soapy water, rinse in distilled water, and rinse with
I A, B, C, D 1 Long-glass fiber reinforcement
isopropyl alcohol. Air dry the sample before assembly, using
2 Medium-glass fiber reinforcement
stainless steel terminals which have been washed in isopropyl
3 Short-glass fiber reinforcement
alcohol. The use of clean cotton or polyethylene gloves during
II A, B, C, D 4 High-impact, long-glass fiber reinforcement
assembly is required since skin oils contaminate the plastic
III A 1 Mineral-filled
surface and have been shown to seriously affect results. Insert
2 Mineral and organic fiber-filled
one binding post through a hole drilled through the center of
1 Acrylic fiber reinforcement, short fiber
the disk. Space the other two electrodes 32 mm from the center
2 Polyester fiber reinforcement, long fiber
electrode. Make test measurements between the center elec-
3 Polyester fiber reinforcement, milled fiber
trode and each of the other binding posts. The machine screw
and washers shall be of stainless steel, the screw of a size to
match the washer size specified in the figure illustrating
6.2 Abatch of molding compound shall be considered a unit
Binding-Post Electrodes for Flat, Solid Specimens of Test
of manufacture and may consist of a blend of two or more
Methods D257. Two specimens may then be mounted in a
production runs of the same material.
wide-mouth jar with the leads going through a TFE-
NOTE 3—Some molding compounds are light and fluffy. The resin may fluorocarbon cover. Condition each specimen 720 h at 60°C
have a tendency to separate out to a degree and should be thoroughly
and 95 % relative humidity, and measure the insulation resis-
mixed before sampling.
tance under the
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