This new 2nd edition of the Databook of Curatives and Crosslinkers provides increased coverage of the latest curatives and crosslinkers products data. It includes a detailed review and evaluation of these product categories with key considerations, benefits and applications highlighted.
Curatives and crosslinkers form a group of additives necessary to process thermoset, but are also used in the modification of thermoplastics. Fifty-seven groups of curatives/crosslinkers are included in the Databook of Curatives and Crosslinkers. They include the following chemical groups of additives: acids, acrylamides, aldehydes, amides, amidoamines, amines, anhydrides, aziridines, bismaleimides, blocked isocyanates, borates, carbamides, carbodiimides, cyanamides, diols, epoxy-functionalized polymers, etheramines, glutarates, graphene oxide derivatives, hydantoin glycols, hydrazides, hydrylamines, hyperbranched polymers, imidazoles, isocyanates, isocyanurates, maleimides, melamines, Mannich bases, methacryloyl chitosan, methyl-vinyl silicone rubber, novolacs, peroxides, peroxyketals, phenalkamine, phenols, phenolic novolacs, phenylacetophenones, phosphonium bromides, polyamides, polyamidoamines, polyamines, polycarbamides, polyetheramines, polyisocyanates, polyols, silanes, silicones, siloxane copolymers, sulfones, thioglycolic acids, thiols, titanates, triazine novolacs, urea resins, and ziconium derivatives. In total, 432 additives are included in the book.
The additives discussed in the book have been suggested for use in 68 polymers and rubbers, as well as in 110 groups of products.
The data for each curative/crosslinker are presented in a separate table. The information in the table is divided into five sections, including General, Physical properties, Health & safety, Ecological, and Use. The contents of these five sections are given below.
General section contains the following fields: name, CAS #, acronym, acrylamide content, active content, active oxygen content, amine value, amine equivalent weight, assay, aziridine content, bio-based composition, borate content, chemical class, chemical composition, common name, cure schedule, EC number, empirical formula, formula, functionality, hydroxyl number, IUPAC name, moisture content, molecular mass, NCO content, RTECS #, SiH content, solvent, solids content, sulfur content, Ti content, water content, and Zr content.
Physical section contains the following fields: acid #, activation energy, alkalinity, ash content, boiling point, color (description, Gardner, platinum-cobalt scales), density, dimer acids, freezing/melting point, gel time, glass transition temperature, half-life, kinematic viscosity, monomer acids, odor, particle size, pH, polymer acids, pot life, refractive index, solubility (in solvents and water), specific gravity, state, storage, surface tension, thin film set time, vapor density, vapor pressure, and viscosity.
Health & safety section contains the following fields: ADR/RID class, autoignition temperature, HMIS (fire, health, reactivity), inventory status, carcinogenicity, DOT class, explosive LEL & UEL, eye irritation, flash point and method, first aid (eye, skin, inhalation), hazardous thermal decomposition products, ICAO/IATA class, IMDG class, ingestion, inhalation (rat LC50), LD50 (dermal rat and rabbit, and oral rat), mutagenicity, NFPA (flammability, health, reactivity), self-accelerating decomposition temperature, skin irritation, teratogenicity, TLV (ACGIH, NIOSH, OSHA), UN risk and safety phrases, and UN/NA class.
Ecological section contains the following fields: aquatic toxicity (NOEC), LC50 (Bluegill sunfish, Daphnia magna, Fathead minnow, Rainbow trout, Zebra fish), bioaccumulation, bioconcentration factor, biodegradation probability, and partition coefficients.
Use section contains the following fields: crosslinking process, crosslinking target, dose, food contact, formulation examples, manufacturer, optional curing time, outstanding properties, problems to avoid, reactive groups, recommended for products, recommended for resins, spacer arm length, suggested curing temperature, suggested maximum compounding temperature, and tips for application.
The above information is beneficial if compiled for all additives in a comparable format. Therefore, we use the same set of units to achieve the compatibility of data. At the same time, data can only be made available if they are provided by the manufacturing companies, which is frequently not a prevalent case.
The data included in the Databook of Curatives and Crosslinkers represent significant suppliers and are based on the most recent available information regarding additives selection. Examples of applications are also discussed.
Four indices have been generated to improve navigation throughout the book, as follows. The index of curative names is placed at the beginning of the book. Indices of the chemical composition of curatives/crosslinkers, their application for different polymers, and product applications can be found at the end of the book.
In addition to this book, which contains data on commercial additives, the Handbook of Curatives and Crosslinkers was published at the same time. The book includes information on the mechanisms of action of these additives, methods of their use, their effects on the properties of transformed products, their applications, and many other fundamental aspects related to this group of additives.
Anna Wypych, born in 1937, studied chemical engineering and polymer chemistry and obtained M. Sc. in chemical engineering in 1960. The professional expertise includes both teaching and research & development. Anna Wypych has published 1 book (MSDS Manual), several databases, 6 scientific papers, and obtained 3 patents. She specializes in polymer additives for PVC and other polymers and evaluates their effect on health and environment.