Products

Defoamers are a class of additives that either prevent foam formation or reduce the foam generated during processing. In the paint and coatings industry, foam is considered undesirable, as it not only causes problems during product packaging but also leads to surface defects, gloss reduction, and even corrosion during application.
Some defoamers also function as de-aerators, effectively removing entrapped air within the liquid mass. The core mechanism of defoamers lies in their controlled incompatibility with the medium: excessive compatibility diminishes their defoaming efficiency, while excessive incompatibility may result in haze in the coating film.

Biocides are a group of additives that prevent the growth and proliferation of microorganisms in the medium and the dried film.
In water-based systems, microorganisms may develop, leading to microbial or mold contamination that can impair the product’s properties. Furthermore, in humid or contaminated environments, the paint film is at risk of mold and algae growth.
By adding suitable biocides, both in-can protection and dry film protection can be achieved, preventing microbial growth and preserving the performance and durability of the product over an extended period of time.

Antioxidants are additives that prevent the premature degradation of coatings and polymers by inhibiting the oxidation process, both during processing and throughout storage and use. In applications exposed to high temperatures—such as heat-resistant paints applied on heaters or polymers processed through extrusion—thermal oxidation poses a serious risk. This phenomenon often arises from the formation of oxygen free radicals or peroxides, which can lead to polymer chain scission, resulting in a loss of mechanical and aesthetic properties and, ultimately, polymer degradation.

Incorporating antioxidants improves thermal stability, increases product durability, and helps preserve the appearance and performance of the material under demanding  conditions.

Light stabilizers are additives that protect coatings and polymers from degradation caused by high-energy solar radiation, especially ultraviolet (UV) light. UV radiation can break polymer chains and generate free radicals, leading to material deterioration and loss of mechanical and aesthetic properties.
They are typically divided into two main classes: UV absorbers, which capture harmful radiation and convert it into harmless heat, and HALS (Hindered Amine Light Stabilizers), which neutralize free radicals and interrupt the degradation cycle.
For maximum efficiency, UV absorbers and HALS are often used in combination, providing superior protection and long-lasting durability under intense sunlight exposure.

Pigments are a class of colorants that are dispersed as solid phases within polymer matrix or coating systems, imparting specific optical, chromatic, and functional properties to the final product. The key distinction between pigments and other colorants, such as dyes, lies in their insoluble nature and their color-imparting mechanism based on physical dispersion rather than molecular dissolution. Pigments are generally categorized into two groups: organic and inorganic. Organic pigments typically feature complex structures with high color strength and wide variety, whereas inorganic pigments, such as metal oxides, exhibit superior thermal and light stability as well as outstanding chemical resistance. Characteristics such as particle size distribution, surface morphology, and dispersibility within the medium play a decisive role in the final performance of pigments in applications including paints, coatings, plastics, inks, and composite materials. Leveraging its access to international supply chains, Kalakar Company sources and supplies a broad range of both specialty and general-purpose pigments from globally recognized brands, tailored to meet the diverse industrial needs of its customers.