Additive masterbatch

 

Polypropylene fiber used in residential and commercial carpeting has grown significantly since being introduced in the MID-1970s. Durability and color fastness make p.p. fiber particularly suited for commercial markets such as offices, hotels and restaurants.
High molecular weight hindered amine light stabilizers (HALS) are widely accepted as the state -of-the -art technology to enhance p.p. fiber performance under demanding condition. In figure 1, results obtained after florida exposure.

Sample: P-P homopolymer, 130/37 dernier, white pigment.
Base stabilization: 0.2 % irganox B 501 W + 0.1 % calcium stearate.
Exposure: Florida 45° south .
Test criterion: hours to 50 % retained tensile strength .

Light stabilizer

 
Control:

1.5%Rangdaneh sirjan u.v. stabilizer with senergy effects kly ( kilolangleys) 140 kly.
HALS chemical name:

mixture of poly [[6-[(1,1,3,3,-tetramethyl , butyl) amino]-1,3,5-triazine-2,4diyl][[2,2,6,6- tetramethyl-4-piperidyl) imino] hexamethylene [[2,2,6,6,- tetramethyl-4- piperidyl) imino]] and dimethyl succinate polymer with 4-hydorxy-2,2,6,6-tetramethyl-1-piperidineethanol.
Composition:

Masterbatch of high molecular weight hindered amine light stabilizer (HALS) in polypropylene carrier.
Active content: <= 20 % HALS
Synergy:

A chemical phenomenon in which interaction of active components of a mixture is such that total effect is greater than the sum of the individual effect . Elements of synergy of HALS combinations.

- the solubility of HALS within the polymer matrix is increased.
- the solubility of the nitroxyl radical ( the active stabilizing species ) is enhanced.
- stabilizer mobility is effectively balanced.
- rate of nitroxyl radial formation is optimized.
- compatibility with co-additives can be improved.
- different HALS mechanisms are complementary.
main characteristics :

- low volatility effective as anti-oxidant for long-term heat stability of polyolefins .
- gas fading resistance in light coloured fibre .
- improved colour yield in pigmented fibre .
- increasing of the solubility of HALS whitin the polymer matrix .
- balancing of stabilizer mobility .
- improving of compatibility with co-additives .
form of supply :
in LDPE 25 kg bags.
Storage :
To be stored cool and dry .