머리말
ISO (국제 표준화기구) 국가 표준 기관의 글로벌 연맹입니다. (ISO 회원국). 국제 표준 개발은 일반적으로 ISO 기술 위원회를 통해 수행됩니다.. 기술위원회가 설치된 주제에 관심이 있는 각 회원 그룹은 위원회에 대표될 권리가 있습니다.. International, governmental and non-governmental organizations in liaison with ISO are also involved in this work. ISO는 국제전기기술위원회(International Electrotechnical Commission)와 긴밀히 협력하고 있습니다. (IEC) 전기 표준화의 모든 문제에 대해.

부분 1 of the ISO/IEC Directive describes the procedures used to develop this document and for further maintenance. 특히, 다양한 유형의 ISO 문서에 필요한 다양한 승인 표준에 유의하세요.. This document has been drafted in accordance with the editorial rules in Part 2 ISO/IEC 지침의 (iso.org/directives를 참조하세요.).

이 문서의 일부 요소는 특허권의 대상이 될 수 있습니다.. ISO는 그러한 특허의 일부 또는 전부를 식별할 책임이 없습니다.. Details of any patent rights identified during the documentation development process will be included in the introduction and/or list of ISO patent claims received (iso.org/patents 참조).

이 문서에 사용된 상호는 사용자의 편의를 위해 제공된 정보이며 보증을 의미하지 않습니다..

For an explanation of ISO specific terms and expressions related to conformity assessment, as well as information on ISO compliance with WTO principles in Technical Barriers to Trade (TBT), see the following URL: 머리말 – 추가 정보

이 문서를 담당하는 위원회는 ISO/TC입니다. 256, 안료, Dyes and increments.

ISO 18473 consists of the following parts under the general heading Functional pigments and increments for special applications:

— 부분 1: Nanometer calcium carbonate for sealant applications

— 부분 2: Nanoscale titanium dioxide for sunscreen applications

ISO 18473-1-2015 특수 목적을 위한 기능성 안료 및 충전재 – 부분 1: 실런트 용도를 위한 나노 크기의 탄산칼슘

소개하다
Sealants are widely used to prevent air, gas or liquid infiltration into many industries, 건설을 포함하여, automobiles and electronics. Increments are an important component of sealant formulations that reduce cost and improve rheological and mechanical properties. The content of increment agent varies widely and can be as high as 50% (mass fraction). A common additive in sealants is calcium carbonate (CaCO 3) because it is readily available in a variety of sizes and can be used as a rheological modifier, enhancer, and sunblock. Commercial calcium carbonate can be divided into heavy calcium carbonate (GCC) and precipitated calcium carbonate (PCC), with three crystal structures of calcite, aragonite and spheroid aragonite. It exists in various forms, such as cubic, spherical, spindle, fibrous and acicular. Calcium carbonate with calcite crystal structure and cubic or spherical form is most widely used in sealant applications.

Nanoscale calcium carbonate (NCC) provides improved performance and additional features for a variety of sealants, including thixotropy, 난연제, and improved durability and recyclability, and has become a major ingredient in sealant formulations. Nanoscale calcium carbonate in powder form is now easy to manufacture, mainly through the precipitation route to control size and form. The importance of surface treatment for the use of NCC in sealants cannot be overstated. Natural calcium carbonate 3 is hydrophilic. 결과적으로, it tends to clump in organic polymers and plasticizers. NCCS, in particular, tend to aggregate more easily due to their small size and large surface area. NCCS are surface treated to give them hydrophobicity and improve their dispersion in hydrophobic systems. The surface treatment also improves the compatibility of the polymer matrix, thus improving the interface adhesion between the increment agent and the polymer.

It was found that the particle size, 비표면적, mass fraction, morphology, pH 값, magnesium content, 오일 흡수 값, water content and other characteristics of the supplied nano-sized calcium carbonate affected the performance of the sealant mixed with these materials. Nanoparticles. The characteristics of NCCS that need to be detailed in relation to sealant performance arise from the following facts. 첫 번째, agreements between customers and suppliers do not always cover all material characteristics that affect sealant performance and/or machinability, or they are interpreted differently by customers and suppliers. 두번째, nanomaterials are relatively new. Material properties may depend on the technique used to measure them. So,

ISO의 이 부분 18473 lists the properties, measurements and characteristics of nanoscale calcium carbonate and is intended to aid its acceptance and application in sealants.

1 적용 범위
ISO의 이 부분 18473 specifies the requirements and corresponding test methods for powdered nano-sized calcium carbonate for surface treatments used in sealant applications.

2 규범적인 참조 파일
All or part of the following documents are conventionally referenced in this document and are required for the application of this document. 날짜가 있는 참고자료의 경우, 인용 전용 버전 적용. 날짜가 없는 인용의 경우, 참조 문서의 새 버전 (모든 수정 사항을 포함하여) 적용됩니다.

ISO 787-2, General test methods for pigments and increments-Part 2: Determination of volatiles at 105 ℃

ISO 787-5, General test methods for pigments and increments – 부분 5: Determination of oil absorption values

ISO 787-9, General test methods for pigments and increments-Part 9: Determination of the pH value of aqueous suspensions

ISO 3262-1, coating increments — 사양 및 테스트 방법 — 부분 1: Introduction and general test methods

ISO 3262-6, paint increments-specification and test methods-Part 6: Precipitated calcium carbonate

– ISO 9277, Determination of specific surface area of solids by gas adsorption – BET 방식

ISO 15528, 그림 물감, 바니시 및 페인트 및 바니시 원료 – 견본 추출

ISO 18473-1-2015 특수 목적을 위한 기능성 안료 및 충전재 – 부분 1: 실런트 용도를 위한 나노 크기의 탄산칼슘

3 용어 및 정의
ISO의 이 부분의 목적을 위해 18473, 다음 용어와 정의가 적용됩니다.

3.1 Nanoscale

Sizes range from approximately 1 nm to 100 nm

참가 참고 사항 1: Attributes that are not extrapolated from a larger size are usually (but not limited to) displayed within this size range. For such attributes, the size limit is considered to be approximate.

참가 참고 사항 2: The lower limit in this definition (approximately 1 nm) was introduced to avoid the designation of individual and small atomic groups as nanoobjects or nanostructured elements, which may imply that there is no lower limit.

3.2 Precipitate calcium carbonate

A synthetic calcium carbonate composed of triangular crystals (예를 들어, calcite) or diamond-shaped biconical crystals (예를 들어, aragonite)

표준정보 부분만 공개. 전체 내용을 보시려면, you will need to purchase the standard through the official channels.