ASTM D742-46T PDF

Full title and description

St ASTM D742-46T — Specification for Nonrigid Vinyl Chloride‑Acetate Resin Plastics. This is a historical ASTM designation (originally issued in 1946 and later shown as D742-46(1955) in catalogues); the document covers classification and specification requirements for nonrigid vinyl chloride–acetate resin plastics used in molding and extrusion applications.

Abstract

This standard specified compositional classes, identification tests and minimum property requirements for nonrigid vinyl chloride‑acetate resin plastics (plasticized vinyl compounds). Typical items addressed in the original specification include compound identification, basic physical property limits (hardness, tensile strength, specific gravity), and performance-related tests used for acceptance and quality control. Many of these topics are covered in later ASTM specifications for nonrigid vinyl chloride compounds (for example, D2287).

General information

• Status: Withdrawn / historical (catalogued as withdrawn in 1955).
• Publication date: Original designation year 1946 (listed in databases as D742‑46; catalog records also show D742‑46(1955) indicating withdrawal).
• Publisher: ASTM (American Society for Testing and Materials), now ASTM International.
• ICS / categories: 83.080 (Plastics / Polymers); materials and product specifications for vinyl (PVC) compounds.
• Edition / version: Designation shown as D742‑46 (sometimes mirrored as D742‑46(1955) in archival catalogues); the product label “46T” appears in some distributors’ listings for archival PDFs.
• Number of pages: Not listed in public catalog excerpts (historic catalogue entries do not report a page count).

Scope

The original specification defined requirements for nonrigid vinyl chloride–acetate resin plastics intended for molding and extrusion compounds. Scope items included classification by composition and hardness range, required identification tests and basic mechanical and physical property limits for quality control and material selection. The historical D742 has since been superseded in practice by more modern ASTM specifications addressing nonrigid vinyl compounds and related test methods.

Key topics and requirements

• Classification of nonrigid vinyl chloride‑acetate resin compounds (by composition and intended processing method).
• Required identification and compositional tests (to verify vinyl chloride‑acetate content and uniformity).
• Physical property limits used for acceptance: hardness (durometer), tensile strength, elongation, specific gravity.
• Durability/performance checks such as volatile loss, brittleness temperature, burning rate and electrical volume resistance where applicable.
• Guidance for specimen preparation and test methods referenced from contemporary ASTM test methods of the era (note: later standards consolidate and modernize these tests).

Typical use and users

Used historically by materials engineers, compounders, quality‑control laboratories, molders and extrusion shops that produced or specified nonrigid vinyl chloride‑acetate compounds. Today the document is mainly of archival/historical interest; designers and purchasers use modern ASTM specifications and test methods for current product development and procurement.

Related standards

Relevant and later ASTM standards that cover similar subject matter or supersede/replace historical content include ASTM D2287 (Standard Specification for Nonrigid Vinyl Chloride Polymer and Copolymer Molding and Extrusion Compounds) and other vinyl/PVC compound standards; related historical items include ASTM D744 and, for rigid PVC compounds, standards such as D4216. These modern standards consolidate test requirements, classifications and property limits for current use.

Keywords

ASTM D742, vinyl chloride acetate, nonrigid vinyl, PVC compounds, historical standard, withdrawn, molding compounds, extrusion compounds, material specification, plastics testing.

FAQ

Q: What is this standard?

A: It is a historical ASTM specification (designation D742‑46 / shown in catalogs as D742‑46(1955)) that covered nonrigid vinyl chloride‑acetate resin plastics for molding and extrusion.

Q: What does it cover?

A: The original document specified classification, identification tests and minimum physical property requirements for nonrigid vinyl chloride‑acetate compounds (hardness ranges, tensile and related properties, and acceptance testing used at the time).

Q: Who typically uses it?

A: Historically, compound formulators, materials laboratories, molders and extrusion manufacturers used it; today most practitioners refer to current ASTM specifications (for example D2287 and other D20 series standards) rather than the withdrawn D742 text.

Q: Is it current or superseded?

A: It is withdrawn and treated as a historical specification in ASTM catalogues. Its technical territory has been incorporated into later, active ASTM standards for vinyl compounds (for example D2287 and others).

Q: Is it part of a series?

A: It belonged to the family of ASTM plastics and polymers standards (committee D20), which includes numerous related specifications and test methods for vinyl chloride polymers and compounds. Over time its content has been absorbed and updated within that committee’s later standards.

Q: What are the key keywords?

A: Nonrigid vinyl chloride‑acetate, PVC compound, molding/extrusion compounds, material specification, D742, withdrawn standard, plastics testing.