In the plastic production process, polymer, additives, processing equipment these three are

the main material conditions.

The variety and quantity of additives used in Thermoplastic are relatively large, and the

processing of thermosetting polymer requires relatively few additives other than those

needed for curing.

The amount of additives used is small, usually a few percent or even a few thousandths of

the weight of the polymer. But plasticizer, reinforcing agent, filler, softener, flame retardant

and other large amounts, up to 10 to dozens of parts. Although the dosage of auxiliaries is

small, but the effect is remarkable, even can make some of the properties of large defects or

processing is difficult to lose the practical value of the polymer into valuable materials.

Because of the use of auxiliaries, many fine chemical products have been applied more

effectively. Therefore, auxiliaries are also known as “Industrial monosodium glutamate”.

Selection of auxiliaries according to product characteristics

Additive that improves stability

Namely stabilizer, is to prevent or delay polymer in the process, storage and use of aging

deterioration. Because of the different mechanisms of aging, stabilizers are further divided

into the following four categories:

1. Antioxidant

(1) Free radical inhibitors: main antioxidants, including amines and phenols;

(2) Peroxide: an auxiliary antioxidant, mainly thiodicarboxylate and phosphite, usually used

in combination with the main antioxidant.

2. Light stabilizers

Also known as ultraviolet stabilizers

(1) Light shielding agents: carbon black, zinc oxide and some inorganic pigments;

(2) UV absorbents: salicylates, Benzophenone, benzotriazole, substituted acrylonitrile,

triazine, etc.

(3) Quenching agent: organic chelate of mainly nickel.

3. Heat stabilizer

Generally refers to the stabilizer used in PVC and PVC copolymer.

(1) main stabilizers: salt-based lead salts, metal soaps and salts, organotin compounds, etc.

(2) auxiliary stabilizers: Epoxide, phosphite, polyols, etc.

(3) composite stabilizers: the main stabilizers (mainly metal soaps and salts and organotin

compounds) and auxiliary stabilizers, other stabilizers composition.

4. Mildew inhibitor

Most polymers are insensitive to mold, but they are susceptible to mold due to the addition

of plasticizers, lubricants, fatty acid soap-based heat stabilizers and other substances that can

breed mold in the processing. There are many chemical types of mildew-inhibitors, including

elemental organic compounds, nitrogen-containing organics, dithiocarbamates, trihalomethyl

sulfides, organic halides, and phenolic derivatives.

Additive for improving processability

Including lubricants, release agent, softener, etc. . The lubricant can improve the fluidity and

demoulding property of the polymers, including hydrocarbons, fatty acids and their

derivatives such as amides, esters and metal soaps. Mold release agent coated in the mold

surface, mold products easy to release, and make its surface smooth, often using silicone oil.

Additive for softening and lightening

1. Plasticizer

The vast majority of plasticizers used in the production of PVC, it is the largest consumption

of additives. The plasticizers are mainly phthalate, others are aliphatic dibasic acid ester,

trimellitic acid ester, phosphate ester, epoxy ester, polyester, alkyl sulfonic acid phenyl ester

and chlorinated paraffin, etc. .

2. Foaming agent

Mainly used in foam plastics. Common blowing agents are Azo compound, Nitroso, sulfonyl

hydrazine and so on. The foaming aids for adjusting the decomposition temperature of

foaming agent are urea, organic acid and fatty acid soap.

Qingdao Sainuo Chemical Co.,Ltd. We are manufacturer for PE wax, PP wax,

OPEwax,EVAwax, PEMA, EBS,Zinc/Calcium Stearate…. Our products have passed

theREACH, ROHS, PAHS, FDA testing.

Sainuo rest assured wax, welcome your inquiry!

Website：https://www.sanowax.com

E-mail：sales@qdsainuo.com

               sales1@qdsainuo.com

Adress：Room 2702,Block B, Suning Building, Jingkou Road, Licang District, Qingdao,

China