Product Data Sheet. NeoCryl BT-175

Transcription

1 is a water borne alkali soluble acrylic copolymer that can be formulated into high performance flexographic and gravure inks which meet clear air regulations. When amine solubilized, can be used as a pigment grinding vehicle for water borne coatings. Delivery form: 40 % solids in water Product characteristics Weight per gallon, 25 o C as supplied Freeze/thaw stability Alcohol dilutability Alcohol/Solution Alcohol/Resin Key Benefits - Alkali-solubility - Stable viscosity over wide ph range - Excellent pigment wetter - Good water resistance - Dilutable in alcohol lbs. - Keep from freezing - Infinite - Infinite Application exhibits a low viscosity at high solids which is stable over a wide ph range eliminating the need for sensitive ph control during on-the-press operation. Figure 1 shows the ph/viscosity response of BT-175 versus a commercial competitor. Product specifications Property Range Unit GAP Total solids w/w % 0001 ph Visc. Brookfield 25 C mpa.s 0020 Other product data Property Value Unit GAP MFFT 24 C 0011 Free monomer Max ppm 0118 Tg 40 C 1140 Acid value (on solid) 100 mgkoh/g 0095 Sediment 1-1 Max % 0005 Sediment straight Max % Preservative(s): CMIT/MIT (3:1) (casno ) % 0222 Test methods Test methods (GAP) referred to in the table(s) are available on request. Storage guidelines The resin should be stored indoors in original, unopened, undamaged container in a dry place at storage temperature between 5-40 C. Exposure to direct sunlight should be avoided. Shelf life Under above mentioned storage conditions, the shelf life of the resin will be 12 months ex work. Material safety A Material Safety Data Sheet for this product is available on request. Page 1 of 5

2 Page 2 of 5

3 Viscosity (mpa.s) 1000 ph - Viscosity Profile at 25% solids neutralised using ammonia 100 Ammonia ,5 7 7,5 8 8,5 9 9,5 10 ph Page 3 of 5

4 FORMULATING WITH NEOCRYL BT-175 When pigment dispersions for water borne inks or coatings are prepared on hard-to-clean grinding equipment such as a sand, pebble, or steel ball mill, is recommended as the dispersing resin. The general procedure is to dilute the with water to 25% solids, followed by neutralization to a ph of 8-9 with ammonia or other suitable amine. Subsequent pigment additions can be made and ground to the desired fineness. Because of its excellent wetting properties, additional dispersing aids are not usually needed. The mill is easily cleaned with water, alcohol, esters or ketones. Formulation R1-129, a water borne flexographic white ink, is offered as a starting point for evaluating NeoCryl BT Because of the wide range of variables involved in formulating printing inks, other additives may be necessary. In Formulation R1-129, the pigment/binder ratio is adjusted with a vehicle that has been neutralized and diluted before addition to the grind. This formulation exhibits excellent adhesion to saran-coated cellophane RS-8. Page 4 of 5

5 Viscosity (cp) Dilution Curve for BT-175 Starting at 28% Solids DMEA (ph = ) Ammonia (ph = ) % 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% Water Added Page 5 of 5