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Aqueous compositions based on polyalkenamers

A water-based composition, ring-opening metathesis polymerization technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve problems such as high material cost

Inactive Publication Date: 2018-09-14
BASF SE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These barrier coatings have the disadvantage that sufficient gas barrier properties can only be achieved with thick coatings which are detrimental to the weight of the tire
Furthermore, said materials are costly due to limited market supply

Method used

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  • Aqueous compositions based on polyalkenamers
  • Aqueous compositions based on polyalkenamers

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0053] The preparation of polymer PALK is preferably according to prior art methods (eg according to the methods described in WO 2011 / 051374, WO 2012 / 028530, WO 2012 / 076426, WO 2012 / 107418 and WO 2014 / 0268865, the disclosure of which is incorporated by reference Herein) is carried out as emulsion polymerization or miniemulsion polymerization in aqueous medium in the presence of a carbene complex suitable for metathesis polymerization.

[0054] For example, the ring-opening metathesis of olefin monomers can be carried out by first adding water and optionally a dispersant to the polymerization vessel, in the olefin or olefin mixture to be polymerized or in a mixture of olefin and organic solvent Dissolving the organometallic carbene complex used as catalyst, introducing said olefin / carbene complex solution into an aqueous dispersant solution, optionally converting the olefin / carbene complex macroemulsion thus formed into a miniemulsion , and reacting the macro- or mini-emulsion ...

Embodiment 1

[0190] Embodiment 1: Preparation of ring-opened polycycloolefin dispersion 1 (PALK-D1)

[0191] Under a nitrogen atmosphere, at 20°C to 25°C (room temperature), 107.3g of deionized water, 13.8g of C 16 / C 18 - Fatty alcohol polyethoxylates (available from BASF SE AT) aqueous solution (20% by weight), 2.6g n-hexadecane, 8.9g norbornene and the mixture of 43.4g cis-cyclooctene are added by weighing in the 250mL glass flask that magnetic stirrer is housed, make the The mixture was stirred vigorously for 1 hour to form a homogeneous monomer macroemulsion. The resulting monomer macroemulsion was then homogenized for 10 minutes using a UP 400s ultrasonic processor (Sonotrode H7, 100% power). Subsequently, the obtained monomer emulsion was transferred to a temperature-controllable 500 mL glass flask equipped with a stirrer, a thermometer, a reflux cooler, and a feed vessel under a nitrogen atmosphere, and heated to 75° C. with stirring. Stirring while maintaining the temperature...

Embodiment 2

[0192] Embodiment 2: the preparation of ring-opened polycycloolefin dispersion 2 (PALK-D2)

[0193] Example 2 was carried out similarly to Example 1 except that 11.9 g of dicyclopentadiene and 40.5 g of cis-cyclooctene were used instead of 8.9 g of norbornene and 43.4 g of cis-cyclooctene. The aqueous polymer dispersion obtained had a solids content of 29.9% by weight. The measurement results showed that the obtained polymer had an average particle size of 401 nm, a glass transition temperature of -59°C and a density of 0.895 g / cm 3 .

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Abstract

The invention relates to aqueous compositions containing a) at least one polymer PALK in the form of dispersed polymer particles, wherein the polymer PALK can be obtained by the ring-opening metathesis polymerization of at least one cyclic olefin monomer and b) at least one polymer P2 in the form of dispersed polymer particles, wherein the polymer P2 does not have an olefenically unsaturated C-C bond and has repeating units which have at least one polar group. The aqueous compositions are suitable in particular for producing films and barrier coatings which have a very good barrier effect against gases such as air, oxygen, nitrogen, argon, and carbon dioxide, in particular against oxygen and oxygen-containing gases such as air. At the same time, the films and coatings have very good mechanical properties, in particular a high elongation at break while having good tear strength.

Description

[0001] The present invention relates to aqueous compositions based on ring-opened polycycloolefins and their use as barrier coatings. Background technique [0002] In the field of pneumatic car tires, it is important to ensure that compressed air or fill gas provides the required pressure and necessary gas volume for functional tire operation for as long as possible. Therefore, conventional pneumatic tires generally have an air-impermeable rubber layer inside the tire. The tire inner layer seals the gas-filled interior and replaces the inner tube in tubeless tires. In addition, pneumatic automobile tires are generally composed of various materials, and also contain metal components, for example, as a carcass material. Some of these materials and tire components are sensitive to oxidation. Thus, the tire inner layer also protects tire materials and components from oxidation. Since car tires are subjected to high mechanical stresses, the materials used need to exhibit suitabl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G61/08C09D165/00C08F4/00C09D5/00
CPCC09D5/00C08G61/08C09D165/00C08G18/6659C08G18/755C08J5/18C08G18/0828C08G18/3228C08G18/3234C08G18/3271C08G18/348C08G18/42C08G2261/3322C08G2261/3324C08G2261/418C08G2261/612C08G2261/60C09D133/062C08J2333/08C08J2375/06C08J2445/00C08L2201/54C09D131/04C09D175/06C08L65/00C08L75/04
Inventor T·斯密特N·L·内格雷特赫雷拉S·达曼B·斯特姆K·穆勒K·哈勃勒
Owner BASF SE