| 释义 |
novolak|ˈnəʊvəʊlæk|
Also novolac.
[f. as Novocastrian n. and a. + (alteration of) lacquer n.]
Any of a range of soluble, fusible resins formed by condensing formaldehyde with phenol using an acid catalyst, which are used extensively in varnishes.
1909L. H. Baekeland in Jrnl. Industr. & Engin. Chem. Aug. 547/2 In order to simplify matters, I propose to call this substance Novolak. 1944H. R. Fleck Plastics: Sci. & Technol. ix. 203 Such properties as the durability and hardness of the Novolac type of resin were obviously very desirable properties to have in a varnish. 1970E. Parkes et al. in K. Strauss Appl. Sci. in Casting of Metals ix. 359 The novolac produced in this way, when cooled down, is a hard glass-like solid and may be ground for use in the manufacture of precoated sand by the hot-coating technique. 1973Materials & Technol. VI. viii. 590 The prime use of moulding powders based on novolak resins is for the production of articles and components in the electrical engineering field. |