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Fluoropolymer processing additive, compositions, and methods

A technology of polymers and compositions, applied in the field of 0010] on the other hand, can solve problems such as harmful chemical stability

Inactive Publication Date: 2018-06-08
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, acidity in the main chain has been proposed to be detrimental to chemical stability

Method used

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  • Fluoropolymer processing additive, compositions, and methods
  • Fluoropolymer processing additive, compositions, and methods
  • Fluoropolymer processing additive, compositions, and methods

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0102]

[0103] testing method

[0104] monomer composition

[0105] Monomer composition using 400MHz or 499.7MHz 1 H-NMR and 376.3MHz or 470.2MHz 19 F-NMR to evaluate. Small aliquots (~90-130 mg) of all fluoroelastomer samples except Example 1 were completely dissolved in 0.8-0.9 mL of deuterated acetone (acetone-d 6 ) aliquots, then the solution was spiked with a small amount of 1,4-bis(trifluoromethyl)benzene (p-HFX), deuterated acetic acid (CD 3 CO 2 D) and CFCl 3 for NMR analysis. The sample of Example 1 exhibited poor solubility in acetone. A portion of the samples were completely soluble in acetone-d 6 , while a part of the sample was in acetone-d 6 form a gel. At this time, only the acetone-soluble fraction from Example 1 was analyzed. 400MHz or 499.7MHz with Agilent VNMRS 400 and Agilent VNMRS 500FT-NMR spectrometers 1 H-NMR spectrum and 376.3MHz or 470.2MHz 19 F-NMR spectroscopy, the spectrometer was operated at an analysis temperature of about 22...

Embodiment 2

[0119] Example 2 uses high fluorine copolymer, modified "FLS2530". A second sample was obtained by blending equal amounts of "FC1650" (MV 44) and "FC2230" (MV 38) (average MV ~ 41 ) on a two-roll mill. This "blend" shown in Table 2 was prepared to obtain a viscosity profile that closely matched that of the modified "FLS2530".

[0120] Samples of these fluoropolymers were tested on film liners using the procedure described above and compared to FX 9613 (MV ~ 33) and FX 9614 (MV ~ 68). The samples were tested at levels increasing in increments of 300 ppm from 300 ppm without the use of PEG. The polymer composition and dyad content are reported in Table 2, along with the time to melt fracture elimination (TTC) and the amount of PPA (g) required to eliminate MF. The time to eliminate melt fracture was used as a measure of PPA efficiency. To allow direct comparison and minimize the effect of increasing concentration levels, the amount of PPA used was calculated by multiplying th...

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PUM

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Abstract

A polymer composition includes a non-fluorinated, thermoplastic polymer and a minor amount of a fluoropolymer combined with the non-fluorinated polymer. A polymer processing additive composition thatincludes a fluoropolymer and a polymer processing additive synergist is also disclosed. The fluoropolymer includes diads represented by formula -CF2-CF(R)-CH(R')-CF(R")- in a range from about 23 molepercent to about 50 mole percent. Each R is independently -CF3, -Rf, or -ORf, each R' and R" are independently H, F, CF3, or -Rf, and each Rf is independently a perfluoroalkyl group having from 1 to 12 carbon atoms and optionally interrupted by one or more -O- groups. A method of reducing melt defects during the extrusion of a polymer is also disclosed.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Application 62 / 240,731, filed October 13, 2015, the disclosure of which is incorporated herein by reference in its entirety. Background technique [0003] Extrusion of polymeric materials in article formation and shaping is a major part of the plastic or polymeric article industry. The quality of the extruded article, and the overall success of the extrusion process, is often affected by the interaction of the fluid material with the extrusion die. As with any melt-processable thermoplastic polymer composition, there is a critical shear rate above which the surface of the extrudate becomes rough or deformed, and below which the extrudate The output will be smooth. See, eg, "Melt Extrusion" by R.F. Westover, Melt Extrusion, Encyclopedia of Polymer Science and Technology, Vol. 8, pp. 573-581 (John Wiley & Sons 1968). Against the economic advantage of extruding a polyme...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L27/16C08L27/20C08F214/28
CPCC08L27/06C08L2205/02B29B7/88B29C48/022C08L23/06C08L27/16C08L27/20B29K2023/0625C08L2205/03C08L2205/06C08L2205/08C08L2207/066
Inventor 克劳德·拉瓦莱彼得·J·斯科特丹尼斯·杜谢恩戴尔·E·胡特琴斯拉里·A·拉斯特柯尔斯滕·J·弗罗涅克托马斯·J·布隆
Owner 3M INNOVATIVE PROPERTIES CO