Additives for polyolefins

März 5, 2020

What are polyolefins? Polyolefin is a type of polymer of olefins. For example, polypropylene or polyethylene. In this article we will highlight our additives for polyolefins for industrial use.


First of all, we will explain a little bit more about Polyolefins. Polyolefins are thermoplastic resins obtained by separate polymerization or copolymerization of α-olefins. For example, ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 1-octene, 4-methyl-1-pentene and some cyclic olefins. It is a generic term for a class of thermoplastic resins. Due to the abundant raw materials, low prices, easy processing and molding, and excellent comprehensive performance, it is a type of polymer material with the largest output and a wide range of applications.

Secondly, Polyolefins encounter the effects of oxygen and sunlight in nature. This causes the molecular chain and auxiliary of resin to generate free radical R of the polymer. And it will further react with oxygen to form oxidative free radical RO. Furthermore, the peroxide free radical ROO, the free radical has strong activity and can capture hydrogen from other resin molecular chains and additives to form ROOH hydroperoxide. The unstable hydroperoxide ROOH will be cracked into new free radicals RO and HO. The two active free radicals further react with oxygen to form new hydroperoxide ROOH. The automatic catalytic oxidation occurs repeatedly, which causes the compounds to break, degrade and crosslink, resulting in molecular chain rupture completely and requires protection. Therefore, it is important to solve the aging problem of polyolefins and create strong parts.

Applications of Polyolefins

The application of anti-aging additives is not a simple addition and accumulation. But an unified system that needs comprehensive consideration. The design of polyolefin anti-aging system should start with the selection of additives for the polymer. Secondly, selecting the appropriate additives, forming a reasonable formula. At the same time considering the synergy of the additives, the appropriate processing technology and the taboos between the additives to achieve the best status. Which additives for polyolefins are necessary? This highly depends on the polymer and application. Examples of polymers are high density polyethylene (HDPE), low density polyethylene (LDPE), Polypropyle (PP) and Polyisobutylene and Polymethylpentene.

UV Absorbers

Especially ultraviolet light can accelerate the frequency of atomic motion and accelerate the degradation of plastics such as oxidation reaction. UV absorbers are indispensable in polyolefins. They can strongly absorb UV rays and convert their energy into harmless thermal energy to release. UV absorbers include benzotriazoles, benzophenones, salicylates and so on. Omnistab UV 326, UV 329, UV BP 12 (531), UV P, UV 234 are UV absorbers to use as additives for polyolefins, like polyethylene or polypropylene. Click on each product to view the properties and performances. Besides the already known UV absorbers, we are developing a growing number of high quality absorbers under a registered trademark.

Light Stabilizers

A light stabilizer is usually a hindered amine light stabilizer. The hindered amine light stabilizer contains a piperidine group, and a piperidine nitroxide free radical is generated after oxidation. Piperidine nitroxide free radicals have greater activity and can react with alkyl free radicals and alkoxy free radicals that are degradation product in the resin to produce piperidine alkylamine ethers and piperidyl peroxide amine ethers, stopping the degradation of the resin. Light stabilizers can continuously self-renew and activate, and can structural capture newly generated free radicals, thereby achieving the purpose of protecting materials. Browse to the Omnistab LS 622, LS 944, LS 119, LS 770, LS B783, which are light stabilizers to use in polyolefins.

Anti oxidants

The role of antioxidants is to inhibit or prolong the oxidation reaction of polymers. The principle is that antioxidants can eliminate peroxide radicals generated during the oxidation reaction, reduce alkoxy or hydrocarbon radicals, and decompose peroxides. As a result, the oxidation chain reaction is terminated, and the purpose of preventing polymer oxidation is achieved. Recommended antioxidants used in polyolefins are phenols, amines, phosphites and thioesters. Such as Omnistab AN 1010, AN 1076, AN 1098, AN 168 and AN 80.

Frequently asked questions

What are polyolefins examples?

Polyolefins are type of polymer of olefins. Most common examples are Polyethylene and Polypropylene. Others are Polyisobutylene and Polymethylpentene.

What are some uses of polyolefin?

Polyolefins are mainly used to produce a variety of packaging applications (food packaging and electronic packaging) consumer goods and industrial products (including toys). But also shrink wrap, fibres for use in clothes and manufacturing material like panels or pipes.

What are olefins and polyolefins?

Olefins are monomers and polyolefins are polymers created by bonding each olefin monomer. In other words, polyolefins are macromolecules formed by the polymerization of olefin monomer units. They are not the olefin themselves because the double bond of each olefin monomer is opened in order to form the polymer.

How to reduce yellowing in polyolefins?

Actually we want to avoid yellowing rather than reduce it. In order to avoid yellowing, additives are necessary. The design of polyolefin anti-aging system should start with the selection of additives. Each application requires a different approach. In order to help with the best possible solutions, please contact your Partners in Chemicals representative for your application!

Why are the melting points of acrylics higher than polyolefins?

The stronger the intermolecular bond, the higher melting temperature. Melting points are determined by intermolecular interactions. Usually solid bonds are stronger than liquid bonds.

How to test molecular weight of polyolefins?

Molecular weights can be measured by GPC analysis. Especially with Polyethylene the molecular weight indicates the difference between low density polyethylene (LDPE), Medium density polyethylene (MDPE) and high density polyethylene (HDPE).

Which plastics are polyolefins?

Polyolefins are a type of polymer of olefins. Most common examples are Polyethylene and Polypropylene. Others are Polyisobutylene and Polymethylpentene.

How are polyolefins molded?

Production with extrusion blow molding, injection molding an general purpose extrusion.

Better weather resistance of polypropylene fabric

Polypropylene (PP) fiber is a synthetic fiber spun from isotactic polypropylene, which is polymerized by…


Dubai branch office management buy-out

Since 2014 Partners in Chemicals is, under the name of ICG Specialty ChemicalsFZCO, operational in…


Thank you for visiting us!

Thank you for visiting us during Plasteurasia 2022 at the booth of our partner Etkin…


Hindered phenolic antioxidants for protection of polymers

Hindered phenolic antioxidants are compounds that have substituents on one or both sides of the…


K fair 2022 in Düsseldorf 

We will be exhibiting at the upcoming K fair in Düsseldorf for the 5th time…


Thermoset plastics – how to improve its durability and color stability?

Thermoset plastics, with thermosetting resin as the main component. It is a plastic that forms…


How to obtain better performance with Polyurethane adhesives?

Polyurethane (PU) adhesives are adhesives that contains -NHCOO- and/or isocyanate group (-NCO-) in the molecular…


Modified plastic in lightweight cars

In recent years, the development of the automotive industry revolves around lightweight, environmental protection and…


How to alleviate polyurethane yellowing?

In this article we will explain how to alleviate polyurethane yellowing. Polyurethane products are widely…


Making high-end textiles UV-resistant

UV-resistant treatment is an essential part of the functional textile finish for making high-end textiles…


Silicone adhesives

The silicone adhesives used in the early days came from natural materials. For instance, animal…


Optical Brighteners

Optical Brighteners are additives to mask the inherent yellowness and improve colors and make your…


Water-based sustainable paint

As people’s awareness of health and environmental protection is gradually improving, water-based sustainable paint is…


Omnistab Benzotriazole UV absorbers

Omnistab Benzotriazole UV absorbers have exceptionally strong and broad UV absorption properties throughout the UV…


Limit electricity for carbon reduction

The Chinese government has decided to limit electricity for carbon reduction. China is aiming to…


Excellent hydrolysis resistance phosphite antioxidant

Do you choose the right antioxidant to increase the heat aging resistance of materials? The…


Plastics with UV absorbers, a “Protective umbrella”

Almost all plastics that are exposed to sunlight or other outdoor weather conditions require protection….


Efficient liquid UV absorber

The Omnistab UV 1 is an efficient liquid UV absorber, which can absorb ultraviolet light…


Nucleating agent for polyamide

The amorphous form of polyamide is obtained by rapid quenching of molten polymer to a…


Omnistab series for automotive coatings

Automotive coating is one of the fastest developing coatings worldwide. New products are usually better…


UV Filter Sunscreen

Meteorologically, it is still winter in the Northern Hemisphere. However, the first rays of the…


What do you know about Powder coating?

What is powder coating? It is quite simple, but we would like to explain it…


Adhesives and Sealants protective products

Adhesives and sealants are essential products in many industries. Their applications range from paper, packaging,…


The world of fiber applications

What are fiber applications? Today, more than half of all fiber consumed is synthetic. For example,…


„Gorgeous modification“ of Benzotriazole UV absorber

Omnistab UV 360 is a very efficient benzotriazole UV absorber. It has good UV absorption…


Expectations early 2021

This year was different from other years and a huge challenge for everyone. Working differently…


New product groups

New product groups coming soon! We are continuously working on our product portfolio to serve…


Today’s highlight is a triazine UV absorber

A triazine UV absorber has excellent properties. In addition, the dosage you need to put…


Antioxidant for long-term thermal stabilization

Looking for an antioxidant for long-term thermal stabilization? You probably need an asymmetric hindered phenol…


UV Absorber used in a wide wavelength spectrum

In this article we will explain more about the UV absorber used in a wide…


Temperature resistant anti oxidant

An excellent temperature resistant anti oxidant is the Omnistab AN 80. The organic combination of…


PP Fibers

Looking for more stability of your polypropylene fibers (PP fibers)? Our Omnistab LS 119 is…


PE wax

In this article we will explain the characteristics and features of polyethylene wax (PE wax)….


Evaluation of new light stabilizers

Choosing your product among all available light stabilizers in the market is challenging. Based on…


Light stabilizer 2020

As of June 2020, we expand our product range with the development of, ironically, Light…


Sustaining Textile

Producing sustainable products is a hot topic. Especially in the field of clothes, it all…


Prolong the lifecycle of your engineering plastics

Engineering plastics and resins instead of metal? Yes we can. In this article we will…


UV absorbers in cosmetic industry

Sunscreen is an eternal topic in cosmetics, but it cannot exist without UV absorbers in…


Chinaplas 2021

Under current circumstances of the COVID-19, the Chinaplas will be postponed again. The 34th Chinaplas…


Omnistab Additives in Water-based Coatings

Water-based coating are coatings that uses water as a diluent and does not contain organic…


Corona virus

In this news letter we give you an update regarding to the latest Corona virus…


Principles of stabilizers

Light stabilizers are important additives in rubber and plastic applications. In this article we focus…


Happy Chinese New Year

It has been a pleasure to work with you this year, we wish you a…


Anti yellowing agents

We launched two anti yellowing agents, Omnistab HN 130 & Omnistab HN 150. Both are…


Happy holidays

On behalf of our team: we wish you happy Holidays, all the best to you…


Comparison test PA6 with Omnistab LS 5519

In October we introduced the new light stabilizer for Polamide (PA); Omnistab LS 5519. To…


Light stabilizer for nylon – Omnistab LS 5519

Omnistab LS 5519 is a highly efficient light stabilizer for nylon. For example, polyamide (PA)….


Liquid Anti Oxidant

In the world of additives you see a large group of anti oxidants in powder, granular and flake form. However, if you are looking for a liquid anti oxidant


UV absorber for agriculture film

There are many different UV absorbers, but there is one that really stands out if…


Natural Rubber Latex

Since the start of Partners in Chemicals we offer the market Natural Rubber Latex. Natural…


Explosion Eastern China

An explosion at a pesticide plant in eastern China is the latest in a series…


End of cooperation with the NRC Group

Partners in Chemicals has decided, in mutual agreement with Nordmann Rassmann (NRC), to end our…


Evaluation of three UV absorbers

In this article we evaluate three different UV absorbers. They have advantages and associated characteristics….


High performance light stabilizer for coatings

In this article we highlight the performances of our Omnistab LS 123. This product is…


Near Infrared Absorber for Laser Beam Welding

Laser Technology Laser technology was originally used in 1970 to weld plastic film with CO2…


Update on chemical factory closures in China

The main purpose of China’s “Cease-Work Orders” is to optimize the atmospheric environment and control…


Introducing N3coat

It’s all about people “I believe in an honest and open way of doing business….


Omnistab NIR LW

The right laser absorber The diode laser has a wavelength of 800 ~ 1000nm and…


How to stop the yellowing of polyurethane flexible foam

A great number of manufacturers, including those that make high-grade sponge, have tried different solutions….


Liquid triazine UV absorber

Omnistab UV 400 is a liquid triazine UV absorber for coating products. We specially developed…


Chinaplas 2017

Partners in Chemicals presents Together with Longquan Chemicals, our booth in Hall 9.3 on stand…


Daniel Knegt

ITU WPS Gold Coast Recently he participated in the ITU WPS Gold Coast with his…



Therefore, polymer additives are essential during manufacturing processes. It safeguards the exquisite look of surfaces…


Restrain on Chinese chemical production

The Chinese government started a straightforward campaign to decrease water pollution to control the waste…


ICG Specialty Group expands portfolio

The ICG Specialty Group is a global supplier of polymer additives whose proprietary Omnistab brand…


European Coatings Show 2016

During the European Coatings show we also showed the new generation product: Omnistab NIR. Its…


New environmental laws implemented

Why is the Chinese Chemical industry struggling? “There is still large gap in result between…


Introducing partnership with Deltachem

A Chinese partner of choice “We work with people from the Netherlands, China, Israel, Dubai,…