Additives For PVC

Baoxu Additives for PVC

Baoxu Chemical Supply Antioxidants, Colorants, flame-retardants, Heat Stabilizers, Impact Modifiers, Lubricants, OBAs, UV Stabilizers for PVC plastics.  We Simply Plastic Compounding, Heat resistance, color are 2 difficulties in PVC processing.

Antioxidant for PVC

Polymer antioxidants can be added to improve the shelf life of the product or to improve its high-temperature stability. while adding a stability margin during thermal processing. Antioxidant BX AO 1010, BX AO 1076, BX AO TPP  is used a general purpose Antioxidant for PVC plastics.

Compatibilizer & Impact Modifiers for PVC

Impact Modifiers are substances that increase the durability of molded or extruded plastics, especially those that need to be constantly subjected to impact forces like cold weather. They are added to compounded materials to provide performance features. They provide strength and break resistance to the product for which they are added. They also provide rigidity to the product to prevent it from wrapping or sagging during everyday use. Mbs and acrylic group impact modifiers are used for PVC plastic, used to replace Brands like Dow,  Baoxu Chemical offer impact modifier for PVC as table below

Heat Stabilizer for PVC

For the processing of PVC, thermal decomposition does not change its properties much, mainly affecting the color of the finished product, and adding heat stabilizers can inhibit the initial colorability of the product. In addition, if there is oxygen in the thermal decomposition process of PVC, there will be colloidal carbon, peroxide, carbonyl and ester-based compounds. In this case, it is necessary to add a heat stabilizer in the process of PVC processing, so that to a certain extent, it can replace the unstable chlorine atoms in PVC, absorb hydrogen chloride, and undergo addition reactions with unsaturated parts. Inhibits the degradation of PVC molecules.

• •  Lead salts Heat stabilizer

  Lead salts are the most commonly used heat stabilizers for PVC, and their dosage can account for more than half of PVC heat stabilizers.
  Advantages: Excellent thermal stability, long-term thermal stability, excellent electrical insulation performance, and good weather resistance.
  Disadvantages: poor dispersibility, high toxicity, initial coloring, difficulty to obtain transparent products, and difficulty to obtain brightly colored products, lack of lubricity, to generate sulfur and prevent pollution.

  • Metal soap heat stabilizer

  The second largest main stabilizer after lead salts in dosage, although its thermal stability is not as good as that of lead salts, it also has lubricity. It is non-toxic except for Cd and Pb, transparent and non-sulfurized except for Pb and Ca. Pollution, so it is widely used in soft PVC, such as non-toxic, transparent and so on. Metal soaps can be metal (lead, barium, cadmium, zinc, calcium, etc.) salts of fatty acids (lauric acid, stearic acid, naphthenic acid, etc.), among which stearate is the most commonly used, and its thermal stability is in the order of four: zinc salt > cadmium salt > lead salt > calcium salt/barium salt. Metal soaps are generally not used alone, and are often used between metal soaps, or in combination with lead salts and organic tin.

  • Organotin heat stabilizer

  Organotin is the most effective and widely used class of heat stabilizers, and its outstanding advantages are: superior heat stability, and good transparency, and most of them are non-toxic. The disadvantage is that the price is high (but the amount added is small, generally only 0.5~2 parts), and another major disadvantage is that most of them have no lubricity. Most organotins are liquid, only a few are solid. It can be used alone or often combined with metal soap.

  • Organic Antimony heat stabilizer

  This is a new type of PVC heat stabilizer. It has excellent initial hue and hue retention, especially when used in low amounts, and its thermal stability is better than that of organotins. It is especially suitable for PVC formulations in twin-screw extruders.

  • Rare earth stabilizer

  The stabilizer is a unique stabilizer developed by our country and is a new type of heat stabilizer. Rare earth elements include 15 lanthanide elements with original serial numbers ranging from 57 to 71 and 17 elements in total, such as yttrium and thorium, which are similar to them.

  • Liquid composite Heat Stabilizer

  The liquid composite heat stabilizer is composed of organometallic soaps, phosphites, hindered phenol antioxidants, and solvents. Organometallic soaps are the main components of liquid complex stabilizers. The main products are liquid barium/cadmium/zinc, barium/cadmium, calcium/zinc, barium/zinc and other composite stabilizers, which have been used in soft PVC calendered film, hard PVC transparent sheet, PVC transparent bottle, etc.

   

Flame Retardant for PVC

Combustion could occur when a substance is heated to its flammable temperature in the presence of oxygen. Flame retardants are generally designed to provide a particular level of resistance to ignition or flame spread. This is achieved by suppressing oxygen availability, building up of char at the surface, inhibiting the combustion reaction within the flame area, or by other mechanics.

Halogen Flame Retardants for PVC

Chlorinated paraffins is often used as a halogen flame retardant for PVC.

Halogen Free Flame Retardants for PVC

aluminum hydroxide, BX FR IPPP,  BX FR TPP are often used as halogen-free flame retardants for PVC.

Impact Modifiers for PVC

Impact Modifiers are substances that increase the durability of molded or extruded plastics, especially those that need to be constantly subjected to impact forces like cold weather. They are added to compounded materials to provide performance features. They provide strength and break resistance to the product for which they are added. They also provide rigidity to the product to prevent it from wrapping or sagging during everyday use. MBS and Acrylic, Silicon import modifiers are used for PVC as impact modifiers. Baoxu Chemical offer impact modifier for PVC as table below

Lubricant for PVC

Lubricants are a kind of additive used to improve the processing and appearance of polymers. The function of lubricants is to reduce friction, improve fluidity and mold release during resin or compound processing, and increase the surface smoothness of products. Stearic acid, PE Wax, metal soaps including Mgst, and Znst can be used as lubricant for PVC.

Optical Brightener for PVC

Optical brighteners are used to mask yellow or increase the whiteness of plastics, inks, coatings, paper, and fiber. OB1,   KCB, and FP127 can be used in PVC as optical brighteners.

Pigment and Dyes for PVC

Colorants give color to polymers, plastics, coatings, inks, and fiber. Every color we see in our daily life is related to colorants. For industry usage colorants, we offer organic pigments, solvent dyes, fluorescent pigments, and titanium dioxide. In the colorant portfolio, our products are analogs to BASF and other brands.

1. General-Purpose Economic Pigments for PVC

Pigment Yellow 61, pigment yellow 168, pigment orange 13, pigment orange 34, pigment red 48:1,  pigment red 48:2,  pigment red 48:3,  pigment red 57:1,  pigment red 57:2.

2. High-performance Pigments for PVC

Pigment Yellow 139,  pigment Yellow 183, pigment Yellow 191. pigment orange 43, pigment yellow 151, pigment red 214, pigment red 242.

3. Pigment for outdoor PVC

Pigment Yellow 110, pigment brown 23, pigment brown 25, pigment red 122, pigment blue 15:0, pigment blue 60, pigment green 7, pigment violet 23.

Things to know when selecting pigments for PVC

1. Only pigment, no dyes for PVC.

2. Light Fastness, it is suggested light fastness level above 5 degrees.

3. Immigration, normally use bright color and good migration resistance pigments.

4. Electrical properties, when coloring insulation materials,  electrical properties shall take into consideration as pigment could somewhat decrease PVC electrical properties.

5. Heat resistance, for RPVC, mid to high heat resistance is required.

6. Safety, for food and medical usage PVC, no toxic and chemosmotic shall allow.

UV Stabilizer for PVC

UV stabilizers contain two types of light stabilizers: Ultraviolet Light Absorbers (UVA) and Hindered-Amine Light Stabilizers (HALS), used individually or as blends. UVA filters harmful UV light and helps prevent color change and delamination of coatings, adhesives, and sealants. HALS trap free radicals once they are formed and are effective in retaining surface properties such as gloss and preventing cracking and chalking of paints. The combination of these two families is highly synergistic. UV absorber BX UV 531. BX UV 326, UV 2908 used together with HALS BX UV 770 can be used in PVC as UV Stabilizer.