EXAMPLES
[0049] The following examples are offered to aid in understanding of the การประดิษฐ์นี้ and are not to be construed as limiting the scope
thereof. Unless otherwise indicated, all parts and เปอร์เซ็นต์ages are by weight.
Example 1
[0050] A องค์ประกอบเคลือบ was prepared from the following
ingredients:
The Cowls Grind paste is prepared by combining the
constituents listed in the order of addition shown using a commercial Cowls mixer set to high speed. Grind to no higher than100°F (38° C) or until
Fineness of Grind gauge indicates grind less than 6.5 microns. Withhold deionized water until fineness of grind is achieved and paste is ready for let-
down. Once deionized water has been added to grind paste, pump grind paste into thin-down tank. Begin mixing at high speed; add let-down
constituents in order shown. Adjust finished coating to desired viscosity with deionized water.
Example 2 (Comparative)
[0051] A องค์ประกอบเคลือบ similar to Example 1 was prepared but
omitting the โพลีซิลิโคนเรซิน.
Example 3 (Comparative)
[0052] A องค์ประกอบเคลือบ similar to Example 1 was prepared but substituting a โพลีเอธิลene wax for the โพลีซิลิโคนเรซิน. The composition was prepared from the following ingredients:
The Cowls Grind paste is prepared as Example 1 by combining the constituents listed in the order of addition shown using a commercial
Cowls mixer set to high speed. Grind to no higher than 100°F (38°C) or until Fineness of Grind gauge indicates grind less than 6.5 microns. Withhold deionized water until fineness of grind is achieved and paste is ready for let-
down. Once deionized water has been added to grind paste, pump grind paste into thin-down tank. Begin mixing at high speed; add let-down
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constituents, including Michelman ML103DIF lubricant additive in order shown. Adjust finished coating to desired viscosity with deionized water.
[0053] Examples 1-3 were spray applied to the interior of 211 x 400
electro tin plated steel D&I cans at a film weight of 220 mg, +/- 10 mg; and/or can ends at a coating weight of 16 — 18 mg/4 in2. The spray applied coating is cured by heating the D&I can in a four zone IBO oven to achieve 400°F (204°C) on the dome (e.g., bottom of can) for 90 seconds for 5 minutes total bake. The roll applied coating is cured by heating the coated steel sheet for
12 minutes at 400°F (204°C). The coil applied coating is cured for 18 seconds with a PMT of 500°F (260°C) for 3 to 5 seconds. The can ends were seamed onto the cans containing a meat based ground beef composition that
simulates dog food. The cans were filled to Y2" headspace and were steam processed for 90 minutes at 121°C and evaluated for การแตกร้าวขนาดเล็ก in the
headspace by testing metal exposure and visible corrosion. The results are reported below:
[0054] The ส่วนเคลือบ of Examples 1-3 were also evaluated for slip or
meat release properties. The test that was used was to fill the steel cans
coated as described above with the องค์ประกอบเคลือบ of Examples 1-3 with a ground beef composition that simulated dog food. The composition is made from equal parts by volume of ground beef (30 เปอร์เซ็นต์ fat), Quaker Oats and eggs. This composition was mixed well and placed into 3 cans as described above for each coating being tested. After steam processing and cooling overnight, the cans were opened and the cans inverted and shook up to five (5) times to release the contents from the interior of the can. The
results are reported below:
Evaluation
1 Complete release
2 Meat had to be pulled out with a fork
Partial release with some residual meat clinging to coating surface