Thermoplastic moulding composition with water-repellent properties

Patent metadata

Field	Value
Publication number	US-9809733-B2
Application number	US-201414890822-A
Country	US
Kind code	B2
Filing date	May 20, 2014
Priority date	May 23, 2013
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

Abstract

It was found that water-repellent thermoplastic moulding compositions, which comprise a) from 66 to 72% by weight of one or more styrene-acrylonitrile copolymers as component A, b) from 25 to 35% by weight of one or more polyacrylate rubbers as component B, c) from 1 to 5% by weight of one or more fluorine-containing polymer components C, selected from the group of polyvinyliden-difluoride and polyvinyliden-tetrafluoride, d) from 0.05 to 6% by weight of one or more further additives, which are different from C, as component D, where each of the % by weight values is based on the total weight of components A to D and these give a total of 100% by weight, have good replication properties and lead to highly water-repellent surfaces.

First claim

The invention claimed is:

1. A water-repellent thermoplastic moulding composition, which comprises:
a) from 66 to 72% by weight of one or more styrene-acrylonitrile copolymers as component A,
b) from 28 to 33% by weight of one or more polyacrylate rubbers as component B,
c) from 1 to 5% by weight of one or more fluorine-containing polymer components C, selected from the group consisting of polyvinyliden-difluoride and polyvinyliden-tetrafluoride,
d) from 0.05 to 6% by weight of one or more plasticizers, which are different from C, as component D,

where each of the % by weight values is based on the total weight of components A to D and these give a total of 100% by weight.

2. A water-repellent thermoplastic moulding composition according to claim 1 , which comprises:
a) from 66 to 70% by weight of a styrene-acrylonitrile copolymer as component A,
b) from 28 to 33% by weight of one or more polyacrylate rubbers as component B,
c) from 1 to 5% by weight of one or more fluorine-containing polymer component C, selected from the group consisting of polyvinyliden-difluoride and polyvinyliden-tetrafluoride,
d) from 0.5 to 6% by weight of one or more further plasticizers as component D.

3. A water-repellent thermoplastic moulding composition according to claim 1 , which comprises:
a) from 66 to 70% by weight of a styrene-acrylonitrile copolymer as component A,
b) from 28 to 33% by weight of one or more polyacrylate rubbers as component B,
c) from 1 to 4% by weight of one or more fluorine-containing polymer component C, selected from the group consisting of polyvinyliden-difluoride and polyvinyliden-tetrafluoride,
d) from 0.5 to 6% by weight of one or more plasticizers as component D.

4. A water-repellent thermoplastic moulding composition according to claim 1 , which comprises from 0.5 to 6% by weight of dialkyl-adipate as component D.

5. A water-repellent thermoplastic moulding composition according to claim 1 , which comprises at least one polyvinyliden-difluoride having a MFI (230° C./5 kg) from 6 g to 24 g/10 min.

6. A water-repellent thermoplastic moulding composition according to claim 1 , which comprises from 66 to 72% by weight of a styrene-acrylonitrile copolymer as component A, having a viscosity number VN of from 50 to 120 ml/g, made, based on (A), from 64 to 76% by weight of at least one vinyl aromatic monomer, and from 24 to 36% by weight of acrylonitrile.

7. A water-repellent thermoplastic moulding composition according to claim 1 , which comprises from 28 to 33% by weight of one or more polyacrylate rubbers as component B, made by emulsion polymerization from, based on (B), from 70 to 98% by weight of at least one C1-8-alkyl acrylate, and from 1 to 29% by weight of at least one other mono-ethylenically unsaturated monomer and from 1 to 10% by weight of at least one polyfunctional, cross linking monomer.

8. A water-repellent thermoplastic moulding composition according to claim 1 , which comprises from 1 to 4% by weight of polyvinyliden-difluoride as component C and from 0.05 to 6% by weight of an dialkyl-adipate additive as component D.

9. A process for producing a water-repellent thermoplastic moulding composition according to claim 1 , comprising the step of mixing the components:
a) from 66 to 72% by weight of one or more styrene-acrylonitrile copolymers as component A,
b) from 28 to 33% by weight of one or more polyacrylate rubbers as component B,
c) from 1 to 5% by weight of one or more fluorine-containing polymer components C, selected from the group consisting of polyvinyliden-difluoride and polyvinyliden-tetrafluoride, and
d) from 0.05 to 6% by weight of one or more plasticizers, which are different from C, as component D,

where each of the % by weight values is based on the total weight of components A to D and these give a total of 100% by weight.

10. The process according to claim 9 , where in a first step, the components (A), (B), (C), and (D) are mixed by co-extruding, kneading, or roll-milling the components at temperatures of from 180 to 300° C., and in a second step, the granulate obtained in the first step is cooled.

11. A water-repellent moulding produced from a thermoplastic moulding composition according to claim 1 .

12. A method of use of a water-repellent thermoplastic moulding composition, according to claim 1 for producing water-repellent mouldings.

13. A method of use of a water-repellent moulding according to claim 11 for producing automotive parts.

14. A method of use of a water-repellent moulding according to claim 11 for producing parts of devices for health care and diagnostics.

Assignees

• Ineos Styrolution Group Gmbh

Inventors

• Niessner Norbert
• Boeckmann Philipp
• Mueller Matthias
• Engelhardt Ralf
• Groenendijk Max

Classifications

• C08L51/04 Primary

  grafted on to rubbers · CPC title

• C08L27/16

  Homopolymers or copolymers or vinylidene fluoride · CPC title

• C08K5/0016

  Plasticisers · CPC title

• C08L33/08

  Homopolymers or copolymers of acrylic acid esters · CPC title

• C08L25/12

  with unsaturated nitriles · CPC title