POLY(VINYL FORMAL)

POLY(VINYL FORMAL) 구조식 이미지
카스 번호:
26876-25-5
상품명:
POLY(VINYL FORMAL)
동의어(영문):
PVFO;PVFM;VINYLEC K;FORMVAR 15/95;FORMVAR RESIN;POLY(VINYL FORMAL);FORMVAR 15/95 RESIN;VINYL FORMAL POLYMER;formaldehyde,polymerwithethenol;polyvinyl alcohol formaldehyde foam
CBNumber:
CB5748798
분자식:
C3H6O2
포뮬러 무게:
74.07854
MOL 파일:
26876-25-5.mol

POLY(VINYL FORMAL) 속성

밀도
1.23 g/mL at 25 °C(lit.)
굴절률
n20/D 1.502
물리적 상태
가루
EPA
Formaldehyde, polymer with ethenol (26876-25-5)

안전

WGK 독일 3

POLY(VINYL FORMAL) C화학적 특성, 용도, 생산

제조 방법

Poly(vinyl formal) is generally prepared directly from poly(vinyl acetate) without isolation ofthe intermediate poly(vinyl alcohol). In a typical process, poly(vinyl acetate) is dissolved in acetic acid and then formalin and a small quantity of sulphuric acid (catalyst) are added. The mixture is heated at 70°C for 24 hours. Water is then added to the product with rapid agitation and the poly(vinyl formal) is precipitated as granules, which are washed with alkali and dried.
As the formal content increases there is a progressive increase in softening point, impact strength and hardness. The materials, being amorphous, are soluble in solvents of similar solubility parameter, such as dichloroethylene and dioxan; as the acetate content increases, the polymers become more soluble in ketones, esters and glycol ethers.
The principal use of poly(vinyl formal) is in the electrical insulation of magnet wire. For this purpose, polymers with low hydroxyl content (5-6%) and low acetate content (10-13%) are used in admixture with a resol phenolic resin. On heating at about 175°C, cross-linking occurs; this reaction probably involves the formation of ether links by condensation of methylol groups in the resol and hydroxyl groups in the poly(vinyl formal). These coatings are extremely tough; of particular significance is the fact that they are able to withstand high-speed winding operations.

POLY(VINYL FORMAL) 준비 용품 및 원자재

원자재

준비 용품


POLY(VINYL FORMAL) 공급 업체

글로벌( 2)공급 업체
공급자 전화 이메일 국가 제품 수 이점
Monomer Polymer & Dajac Labs --
info@monomerpolymer.com United States 1609 58
Beijing Hengye Zhongyuan Chemical Co., Ltd --
13552281129@163.com China 6168 64

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