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TECI-INICAL BULLETIN
[ !1\rI TE'J) SIE Rl~A
DIVISION CYPRUS MINES COHPORATION BOX 1201 TRENTON N . J.(609)8035111
THE USE OF BEAVERWHITE 325 IN INTERIOR AND EXTERIOR FLAT LA TEX PAINTS
The Technical Service Laboratories of UNITED SIERRA have evaluated one of our Montana Talcs, BEAVER WHITE 325 versus a 325 Mesh New York State Talc in exterior and interior flat latex paint formulations.
The results of that evaluation show BEAVER WHITE 325 to be equivalent to the New York Talc in both formulations.
The exterior latex formulation was based on a label analysis of a major paint producer's latex house paint. According to the
label, the following information is shown:
Pigment by Weight Vehicle by Weight
39% 61% 100%
Composition of Pigment ~y Weight:
Titanium Dioxide Zinc Oxide Silicates (Talc)
S2% 1 1o/o 37% 100%
Composition of Vehicle by Weight:
*Latex
Soya Alkyd Resin Water
*Synthetic Latex, non-volatile Volatile Water
62% 8%
3 Oo/o l 00%
36% 64% 100%
PVC = Approx. 47% Volume Solids = Approx, 3 3%
The results of the evaluation of BEAVERWHITE 3Z5 versus 325 Mesh New York State Talc in this formulation follows:
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Paint Made With BEAVERWHITE 325
Contrast Ratio: 1, 5-Mil Bird 3. 0- Mil Bird
. 95 (E qual) 98 (Equa 1)
L\lminous ReflectanLe (Green Filter)
89% (E qual)
Yellowness Index
3. 0% (Equal)
Sheen (85% Gloss)
4 (Equal)
I<&N Film Porosity Test ,:, 22% (Sl. Better)
Paint Made With 325 Mesh N . Y. State Talc
95 98 8 9%
Z. 9%
4 25%
*This i s a lest relatively new to the paint industry that gives a good indication of enamel hold-out, film porosity, and stain resistance.
The data shows BEAVEI<. WH!TE 325 to be comparable t.o New York State Talc in t his formulation.
Similarly, BEA VER WHITE 3Z5 was evaluated relative to 325 Mesh New York State Talc in the 62% PVC polyvinyl acetate copolymer interior latex flat wall paint formulation shown below:
AB
Water
450 450
Cc llosize QP-4400
5. 8 5.8
Tamol ?31
12 12
Ph1ronic L-62
22
Nopco NDW
22
Sthylcne Glycol
15 15
Troyson P MA- 30 Titanox I<.A-50
3 3
200 zoo
BEAVERWHITE 325 Nytal 300
200
zos
Imsil A-ZS
75 75
Polyvinyl Acetate Copolymer (55%) 210
2 10
Carbitol Acetate
l 0 10
The ev;i luf,tion again proved BEA VER WHITE 325 to be comparable for a ll p1opcrtici,: kstcd:
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Contrast Ratio (3-Mil Bird) Lum inous Reflectance Yc llow ne s s Index Shean (85% Gloss) Burnish Resistance1 (A Sheen) K&N Film Porosity Te st
(Loss of Reflectance) Scrub Resistance2
Paint A BEAVERWHITE 325
. 972
88, 9%
3. 6%
3
2
o. 9%
(Equal) (Equal) (Equal) (Equal) (Equal) (Equa l }
Equal to Control
Paint B 325 Mesh N. Y. State Talc
.972 89. 0%
3. 6% 3 1
o. 9%
Control
(1) Increase in sheen after 50 cycles on a Gardner Scrub machine using dry cheesecloth.
(2) Performed on a Gardner Scrub machine using wet cheesecloth and Ajax Cleanser.
As an added incentive for the cost-conscious paint formulator to use United Sierra's prod\1cts, we also offer a lower brightne ss version of BEAVERWHITE 325 at considerable cost savings. This product is known as GLACIER 325. The use of GLACIER 325 in latex paints will slightly lower their reflectance and whiteness when compared to BEAV.ERWHITE 325, b\tt the economic advantages it offers may outweigh the slight com-
prornise of whiteness.
The following table compares the General Electric Brightness (GEB) of
BEAVER WIUTE 325, GLACIER 325, Nytal 300 and As bes tine 325 with
paint reflectance, yellowness index and whiteness index in a 30% PVC,
35% Volurne Solids Acrylic Latex Formulation pigmented with 50 /50 Ti02/
talc by volume:
GEB Reflectance
Yellowness Index
Whiteness Index
BEAVERWHITE 325 GLACIER 325
Nytal 300 As b estine 325
91 83 92 91
93. 2% 92. 1% 93. 3% 92. 5%
1. 2 88.8
Z.9 81. 7 l. 6 87. 7 2.0 85.3
For many types of formulations GLACIER 325 would be suitable, especially in view of its price advantage over BEAVERWHITE 325.
Perha ps. you should be using BEAVERWHITE 325 or its low priced counterpart, GLACIER 325, in your latex paint formulations.
The data in this bro hurc arc based upon act\lal experimental work and are bdieved to be reproducible. However, no guarantee is made that the rtsulls as shown will be obtained.
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