colour feature | Pigments
with other inorganic pigment blends,” he says. “Together the NTP Yellow 10P150 and RTZ Orange 10P340 allow high-durability and all inorganic pigmen- tation options for colours like Signal Yellow RAL 1003,” Ryan says. “The NTP Yellow is a brand new patented chemistry and the most impactful new high-performance pigment since DPP red was introduced.”
Above: Shepherd Color’s NTP Yellow 10P150 and RTZ Orange 10P340 are claimed to offer high levels of thermal stability and durability
DCC will be available in Q4 of this year, while BASF, which says the increase will be “significant,” is aiming at 2017. BASF markets BV pigments under the Sicopal and Paliotan brand names. BV pigments are yellow pigments with a greenish
colour tone. BASF says they are a high performance inorganic alternative to pigments containing lead chromate, which, according to the EU chemicals regulation REACH, are classified as CMR substances (carcinogenic, mutagenic or toxic for reproduction). “Over the next few years we expect our customers’
demand for BV pigments to grow faster than the overall pigment market, both in Europe and worldwide,” says Alexander Haunschild, senior vice president of BASF’s Pigments & Resins Europe business unit. BASF points out that, as of this year, it is no longer producing any pigments containing lead chromate. BASF also says it will extend its BV pigment
portfolio, with a temperature stable grade for plastics applications as well as an alkali stable grade for paints. Shepherd Color is also expanding its offering in the
yellow colour space with the two pigment chemistries of NTP Yellow (niobium tin pyrochlore) and RTZ Orange (rutile tin orange). NTP Yellow 10P150 is a high-perfor- mance alternative to lead chromate yellow in the middle-yellow colour space. According to Shepherd Color’s Ryan, it has the highest heat stability for use in engineering polymers “where even pigments like bismuth vanadate yellow struggle.” RTZ Orange 10P340, meanwhile, is said to combine the highest redness value and durability of any pigment in its class on the market. “It provides a way to add redness to colours based on other yellows like bismuth vanadate and NTP Yellow, without the loss in chromaticity found
Right:
Toyocolor’s low shrinkage LS pigments (in the left hand sample) help reduce
distortion 26 COMPOUNDING WORLD | September 2015
www.compoundingworld.com
Organic dispersions Toyocolor Co, part of the Toyo Ink Group, offers products based on the Group’s original dispersion technology. It has announced a low-shrinkage organic pigment dispersion that imparts vivid hues of phthalo- cyanine; and a high lustre, polymer alloy-based material that is metal free and said to produce a deep silky texture. There are currently three Lioprep low-shrinkage
organic pigment dispersions. These are TE 7HF 639 BLU (C.I. Pigment Blue 15:1), which Toyocolor says gives an exceptionally brilliant reddish hue with a shrinkage difference ratio (delta SDR) with the natural polymer of under 15 (which it says means virtually no warping); TE 7HF 547 BLU (C.I. Pigment Blue 15:3), with an excep- tionally brilliant greenish hue and a delta SDR under 10; and TE 5HC 785 GRN (C.I. Pigment Green 7), which has a slightly bluish hue and a delta SDR under 15. The company also highlights a polymer alloy-type
high lustre metal-free material in its Lioplax organic pigment dispersions line-up. This takes advantage of optical interference based on the difference in refractive index at interfaces between matrix resins and domain resins. It can be used in polyolefins and PET.
Easier compounding Typically, many compounders have found it difficult to integrate colour into compounds having high levels of functional additives and fillers because the process requires high levels of pigment. That at least is the view from concentrates company Carolina Color. It says these high levels of pigments decrease efficiencies due to increased machine down time associated with required changeovers.
s
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76 |
Page 77 |
Page 78 |
Page 79 |
Page 80 |
Page 81 |
Page 82 |
Page 83 |
Page 84 |
Page 85 |
Page 86 |
Page 87 |
Page 88 |
Page 89 |
Page 90
