Polymer composition containing siloxane-organic copolymer

一种聚氨酯聚合物、组合物的技术，应用在聚合物组合物领域，能够解决拉伸强度降低、未实现性能分布、不可聚合物相相容性等问题，达到低吸水性的效果

Active Publication Date: 2021-12-31
WACKER CHEM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Addition of siloxane to polyurethane resulted in a decrease in tensile strength at all concentrations chosen
[0009] Thus, in the cases described, by producing simple polymer blends, it was not possible to achieve a sufficient compatibility (compability) of the different polymer phases, and / or the desired (promised) properties profile was not achieved. Improve

Method used

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  • Polymer composition containing siloxane-organic copolymer
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  • Polymer composition containing siloxane-organic copolymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0204] In zone 1 of a counter-rotating twin-screw extruder ZK 25 from Collin (Ebersberg (DE)), 1.6 kg of TPU1 and 0.40 kg of copolymer B1 each in the form of pellets were fed continuously via a hopper And compound. Here the temperature in the feed zone (zone 1 ) was 100° C. and the temperature was raised to 160° C. in zone 2 and to 165° C. in zone 3 . Zones 4 and 5 were at 170°C and the die was heated at 165°C. The rotational speed of the screw was 60 revolutions per minute. The obtained homogeneous melt was extruded as strands (streams, strands), cooled to 30° C. in a water bath, and then pelletized by a strand pelletizer. This gave 1.85 kg of a polymer blend with a copolymer B1 content of 20% by weight.

Embodiment 2-6

[0206] The procedure described in Example 1 was repeated, except that the features listed in Table 1 were selected.

[0207] Table 1

[0208] Example 1 2 3 4 5 6 TPU 1[kg] 1.6 1.2 TPU 2[kg] 1.6 1.2 TPU 3[kg] 1.6 1.2 Copolymer B1[kg] 0.4 0.8 0.4 0.8 Copolymer B2[kg] 0.4 0.8 Heating zone 1[°C] 100 100 100 100 100 100 Heating area 2[℃] 160 160 170 170 170 170 Heating area 3[℃] 165 165 180 180 180 180 Heating area 4[℃] 170 170 185 185 180 180 Heating area 5[℃] 170 170 185 185 175 175 Heating area 6[℃] 165 165 180 180 170 170 Speed ​​[rev / min] 60 60 60 60 60 60 Amount obtained [kg] 1.85 1.90 1.80 1.85 1.90 1.95

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Abstract

The present invention relates to a polymer composition comprising (A) at least one polyurethane polymer and (B) at least one siloxane-organic copolymer having each silicon The oxane segment is 100 to 3000 siloxane units and at least one organic segment, and the organic segment has at least one selected from ester group, amide group, carbamate group, urea group and thiourea group group. The present invention also relates to its preparation method and its use.

Description

technical field [0001] The present invention relates to polymer compositions comprising siloxane-organic copolymers, and also to organic polymers, processes for their preparation, and their use. Background technique [0002] Silicones (siloxanes) have excellent temperature, UV and weathering stability. They retain their elastic properties at relatively low temperatures and therefore also have no tendency to embrittle. In addition, they have specific water-repellent and non-stick surface properties. In addition, silicones can be used to produce very soft elastomers, whose uses often include medical applications. [0003] In contrast, thermoplastic polyurethanes exhibit in some cases excellent adhesion to various surfaces and excellent mechanical properties such as tensile strength and elongation at break. However, a disadvantage of thermoplastic polyurethanes (TPU) lies in the fact that it is technically difficult to produce relatively soft types, since the resulting produ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/458C08L75/04C08L75/08C08L83/10
CPCC08G77/458C08L75/04C08L75/08C08L83/10C08J3/005
Inventor 奥利弗·舍费尔
Owner WACKER CHEM GMBH
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