Slow-crystallizing polyester resins
First Claim
Patent Images
1. A polyethylene terephthalate resin, wherein:
- the polyethylene terephthalate resin has a heating crystallization exotherm peak temperature (TCH) of more than about 140°
C. at a heating rate of 10°
C. per minute as measured by differential scanning calorimetry;
the polyethylene terephthalate resin has an absorbance (A) of at least about 0.18 cm−
1 at a wavelength of 1100 nm or at a wavelength of 1280 nm; and
the polyethylene terephthalate resin has a L* transmission value of more than about 70 as classified in the CIE L*a*b* color space.
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Abstract
The present invention relates to slow-crystallizing polyethylene terephthalate resins that possess a significantly higher heating crystallization exotherm peak temperature (TCH) as compared with those of conventional antimony-catalyzed polyethylene terephthalate resins. The polyethylene terephthalate resins of the present invention are especially useful for making hot-fill bottles having exceptional clarity.
120 Citations
104 Claims
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1. A polyethylene terephthalate resin, wherein:
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the polyethylene terephthalate resin has a heating crystallization exotherm peak temperature (TCH) of more than about 140°
C. at a heating rate of 10°
C. per minute as measured by differential scanning calorimetry;
the polyethylene terephthalate resin has an absorbance (A) of at least about 0.18 cm−
1 at a wavelength of 1100 nm or at a wavelength of 1280 nm; and
the polyethylene terephthalate resin has a L* transmission value of more than about 70 as classified in the CIE L*a*b* color space. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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45. A polyethylene terephthalate resin, comprising:
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less than about 6 mole percent substitution; and
wherein the polyethylene terephthalate resin has an intrinsic viscosity less than about 0.86 dl/g;
wherein the polyethylene terephthalate resin has a heating crystallization exotherm peak temperature (TCH) of more than about 143°
C. at a heating rate of 10°
C. per minute as measured by differential scanning calorimetry;
wherein the polyethylene terephthalate resin has an absorbance (A) of at least about 0.25 cm−
1 at a wavelength of 1100 nm or at a wavelength of 1280 nm; and
wherein the polyethylene terephthalate resin has a L* transmission value of more than about 75 as classified in the CIE L*a*b* color space. - View Dependent Claims (46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60)
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61. A polyethylene terephthalate resin, comprising:
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between about 2 and 50 ppm of elemental titanium; and
wherein the polyethylene terephthalate resin has an absorbance (A) of at least about 0.20 cm−
1 at a wavelength of 1100 nm and at a wavelength of 1280 nm;
wherein the polyethylene terephthalate resin has a b* color value of less than 2 as classified by the CIE L*a*b* color space; and
wherein the polyethylene terephthalate resin has a L* transmission value of more than about 75 as classified in the CIE L*a*b* color space. - View Dependent Claims (62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75)
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76. A polyethylene terephthalate resin, comprising:
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between about 2 and 20 ppm of elemental titanium and between about 15 and 40 ppm of elemental cobalt; and
a heat-up rate additive; and
wherein the polyethylene terephthalate resin has a heating crystallization exotherm peak temperature (TCH) of more than about 140°
C. at a heating rate of 10°
C. per minute as measured by differential scanning calorimetry;
wherein the polyethylene terephthalate resin has an absorbance (A) of at least about 0.25 cm−
1 at a wavelength of 1100 nm or at a wavelength of 1280 nm; and
wherein the polyethylene terephthalate resin has a L* transmission value of more than about 70 as classified in the CIE L*a*b* color space. - View Dependent Claims (77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92)
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93. A polyethylene terephthalate resin, wherein:
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the polyethylene terephthalate resin has a heating crystallization exotherm peak temperature (TCH) of more than about 140°
C. at a heating rate of 10°
C. per minute as measured by differential scanning calorimetry;
the polyethylene terephthalate resin has an absorbance (A) of at least about 0.20 cm−
1 at a wavelength of 1100 nm and at a wavelength of 1280 nm; and
the polyethylene terephthalate resin has a 1100;
550 absorption ratio of at least about 70 percent, a 1280;
550 absorption ratio of at least about 70 percent, a 1100;
700 absorption ratio of at least about 85 percent, and a 1280;
700 absorption ratio of at least about 85 percent. - View Dependent Claims (94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104)
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Specification