prepolymer


Also found in: Acronyms.

prepolymer

[prē′päl·i·mər]
(organic chemistry)
A reactive low-molecular-weight macromolecule or an oligomer, capable of further polymerization.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
M2 PRESSWIRE-August 23, 2019-: New low free isocyanate prepolymers for adhesives and sealants
Thanks to the proven LF technology, various polyols and diisocyanates can be used to produce prepolymers with very low free diisocyanate monomer content.
Cardanol-blocked prepolymer exhibits a slightly lower deblocking temperature and faster deblocking time at 160 [degrees]C compared to that of phenol (Table 2), as per DSC analysis under the same conditions previously reported.
"The focus of our development work is to broaden the range of prepolymers with very low free isocyanate content - a key lever to improved industrial hygiene and worker safety," explained King.
Suprasec is the trade name for Huntsman's range of MDI and MDI-based prepolymers which are used to formulate adhesives, coatings and elastomers.
Johnston explains that since both variations of prepolymers are high-performing, moisture-cure 1K polyurethane sealants and 1K silane-terminated sealants continue to grow in popularity.
Table 1 shows the effect of the dosage of HDI, reaction time, and prepolymer molecular weight changes on the chain extension products.
Various amounts of CNT were incorporated into prepolymer of polysilozane fanging from 0~0.15 vol%.
Synthesis of UF prepolymer.--A three-necked flask was charged with UF and ammonia at a molar ratio of 1:1.1.
The prepolymer was synthesized via a three-step procedure in a 250 mL four-necked, round-bottomed flask equipped with a mechanical stirrer, a thermometer, a dropping funnel, an inlet of dry nitrogen, and a reflux condenser with a drying tube.