APAKAH MAKSUD UREA-FORMALDEHYDE RESIN dalam CORSICA?
Urea-formaldehid
Urea-formaldehid, juga dikenali sebagai urea-methanal, dinamakan untuk laluan sintesis biasa dan struktur keseluruhannya, adalah resin termoset tanpa telus atau plastik, diperbuat daripada urea dan formaldehid yang dipanaskan dengan kehadiran asas ringan seperti amonia atau piridin . Resin ini digunakan dalam pelekat, kemasan, MDF, dan objek dibentuk. Ia pertama kali disintesis pada 1884 oleh Hölzer, yang bekerja dengan Bernhard Tollens. Pada tahun 1919, Hanns John dari Prague, Czechoslovakia memperoleh paten pertama untuk resin urea-formaldehid.
Definisi urea-formaldehyde resin dalam kamus Corsica
Takrif resin urea-formaldehid dalam kamus adalah salah satu daripada bahan sintetik yang tidak berbau kaku yang dibuat daripada urea dan formaldehid dan digunakan dalam kelengkapan elektrik, pelekat, laminates, dan kemasan untuk tekstil.
CORSICA BUKU YANG BERKAIT DENGAN «UREA-FORMALDEHYDE RESIN»
Ketahui penggunaan
urea-formaldehyde resin dalam pilihan bibliografi berikut. Buku yang berkait dengan
urea-formaldehyde resin dan ekstrak ringkas dari yang sama untuk menyediakan konteks penggunaannya dalam kesusasteraan Corsica.
1
Polymer Technology Dictionary
NHR' (where R and R' are organic groups). urea laminated sheet A laminated
plastics sheet material based on a urea-formaldehyde resin. urea moulding
material See urea-formaldehyde moulding material. urea plastics Plastics based
on ...
2
Chemistry of the Textiles Industry
Comparison of the finishing of viscose rayon or cotton with that of nylon with a
methylated urea formaldehyde resin may be illustrated as follows. With the cotton
fibre, the resin enters into the fibre and, when catalysed, produces a polymeric ...
3
Polymeric Materials Encyclopedia, Twelve Volume Set
An acidic-cure catalyst is added to the urea-formaldehyde resin before it is used
as an adhesive. Ammonium chloride and ammonium sulfate are the most widely
used catalysts for resins used by the forest products industry. A variety of other ...
4
Handbook of Occupational Dermatology
Sensitization to amino plastics has developed from urea-formaldehyde resin
used as textile finish (Belsito 1993) and melamine-formaldehyde resin in
orthopedic casts (Ross et al. 1992), gypsum molds (Fregert 1981) or in the
coating of plastic ...
5
Polymer Synthesis: Theory and Practice: Fundamentals, ...
... for all chemicals and products used. Caution: Because of the formation of
gaseous formaldehyde all reactions must be carried out in a closed hood.
Preparation of a Urea-Formaldehyde Resin 30 g (0.5 mol) of urea are dissolved
in 61 g ...
Dietrich Braun, Harald Cherdron, Matthias Rehahn,
2012
6
Building Materials: Dangerous Properties of Products in ...
... UREA-FORMALDEHYDE OLIGOMER □ UREA-FORMALDEHYDE POLYMER
D UREA-FORMALDEHYDE PRECONDENSATE □ UREA-FORMALDEHYDE
PREPOLYMER D UREA-FORMALDEHYDE RESIN □ UREAPAP W □ URE- ...
7
Plastics Technology Handbook, Fourth Edition
Foaming takes place upon feeding air and a urea- formaldehyde resin solution (
see "Urea-Formaldehyde Resin" in Chapter 5). The generated foam is guided by
the action of the tubular vanes to the outlet channel of the vessel from where the ...
Manas Chanda, Salil K. Roy,
2006
8
Formaldehyde and Other Aldehydes
... resins for the production of various building materials, especially plywood and
particleboard. Resins used for building materials include urea-formaldehyde (UF)
, phenol-formaldehyde, and melamine-formaldehyde. Urea-formaldehyde resin ...
9
Plastics Fabrication and Recycling
Foaming takes place upon feeding air and a urea- formaldehyde resin solution (
see “Urea-Formaldehyde Resin” in Chapter 2 of Industrial Polymers, Specialty
Polymers, and Their Applications). The generated foam is guided by the action of
...
Manas Chanda, Salil K. Roy,
2008
10
Concise Polymeric Materials Encyclopedia
Approximately 1 million metric tons of urea-formaldehyde resin are produced
annually. More than 70% of this urea-formaldehyde resin is used by the forest
products industry for a variety of purposes.1 The resin is used in the production of
an ...
BARANGAN BERITA YANG TERMASUK TERMA «UREA-FORMALDEHYDE RESIN»
Ketahui apa yang diterbitkan oleh akhbar nasional dan antarabangsa dan cara istilah
urea-formaldehyde resin digunakan dalam konteks perkara berita berikut.
EPA Limits Formaldehyde Exposure From Wood Products
... in the production of fertilizer, paper, plywood, and urea-formaldehyde resins. ... The emitted formaldehyde can be left over from the resin or composite wood ... «Environment News Service, Mei 13»