Blowing agents, color additives

Additives (antioxidants, antiozonants, softeners, tacfdfiers, peptisers, scorch inhibitors, colorants, flame retardants, blowing agents, process aids, etc.)... 

Liquid color is not a universal coloring system, but nothing is. It can perform in a variety of processes, in nearly all resins. Liquid is at its best in small percentages, where its distribution in the resin is excellent it does modify physical properties somewhat but enhances some properties. It is excellent for heat-sensitive additives, such as blowing agents. Look into using liquid color as a coloring system the economics may work out favorably. 

OBSH is one of the best blowing agents of the sulfonyUiydrazide class. Its gas hberation characteristics (no stepwise change up to 140°C) makes it possible to obtain foams with small, uniform cells. It is nontoxic and does not impart color and smell to articles. OBSH is used for foaming PVC, polyolefins, polysulfides, microporous rubber, or foamed materials based on mixtures of polymers with rubbers. In the last case, OBSH acts additionally as a cross-linking agent. 

Chemicals and Additives Blowing Agents Catalyst and Curing Agents Colorants (Pigments, Dyes, Concentrates, Pastes) Fillers... 

Multifunctional concentrate n. A plastic compound that contains high percentages of at least two of such additives as colorants, stabilizers, flame retardants, lubricants, antistatic agents, anti-blocking agents, blowing agents, fillers, etc, that will be diluted in base resin to provide a tailored compound with the desired final concentrations of the additives in the extruded or molded product. 

The monomers of both artificial and natural rubber must be polymerized into a three-dimensional network to obtain the finished product. Different processes are used, although they are all quite similar. The process of polymerization (called vulcanization) involves the reaction between rubber isomers and sulfur to produce a polymer with enhanced elasticity and reduced plasticity (Table 4). The reaction between the monomers and sulfur is enhanced by the addition of accelerators and activators. Other chemicals that can be added to both natural and synthetic rubber include retardants, anti-oxidants, curing agents, reinforcers, fillers, ultraviolet inhibitors, softeners/extenders, stabilizers, blowing agents and colorants. Readers are referred to Rubber World Magazine s Blue Book (1997), which extensively surveys the various additives to both natural and synthetic rubbers. Those additives... 

The first step of foam production is the mixing of components, i.e., isocyanates are added to a mixture of polyol, catalyst, silicone surfactants, and water, as well as optional blowing agents, cross-linkers, modifiers, flame-retardant additives, colors, fillers, etc. Silicone surfactants help to disperse or emulsify incompatible materials. 

The types of additives discussed here lead to important physical changes. Thus blowing agent use permits the production of cellular structures flame retardants improve thermal and combustion characteristics pigments and colorants change the aesthetic aspect while physical and mechanical properties are modified by active fillers and reinforcements. 

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