Surface treated filler material product for alpha-nucleation of polyolefins

Patent metadata

Field	Value
Publication number	US-10654986-B2
Application number	US-201615574901-A
Country	US
Kind code	B2
Filing date	Jun 20, 2016
Priority date	Jun 23, 2015
Publication date	May 19, 2020
Grant date	May 19, 2020

Abstract

The present invention relates to a surface treated filler material product for alpha-nucleation of polyolefins, a process for the preparation of the surface treated filler material product, a master batch comprising the surface treated filler material product, a polyolefin composition comprising the surface treated filler material product, an article comprising the polyolefin composition as well as the use of the surface treated filler material product as an alpha-nucleating agent for polyolefins.

First claim

The invention claimed is:

1. A surface treated filler material product for alpha-nucleation of polyolefins, comprising
(a) a calcium carbonate-comprising filler material, and
(b) a bicyclo[2.2.1]heptane-2,3-dicarboxylic acid and/or a monovalent salt of the bicyclo[2.2.1]heptane-2,3-dicarboxylic acid and/or a divalent salt of the bicyclo[2.2.1]heptane-2,3-dicarboxylic acid being present on at least a part of the accessible surface area of the calcium carbonate-comprising filler material,
wherein the amount of the bicyclo[2.2.1]heptane-2,3-dicarboxylic acid and/or the monovalent salt of the bicyclo[2.2.1]heptane-2,3-dicarboxylic acid and/or the divalent salt of the bicyclo[2.2.1]heptane-2,3-dicarboxylic acid, in mg, on the accessible surface area of the calcium carbonate-comprising filler material, in m 2 , is from 0.001 mg/m 2 to 500 mg/m 2 .

2. The surface treated filler material product according to claim 1 , wherein the polyolefin is selected from the group consisting of polybutylene, polypropylene, polyethylene and mixtures thereof.

3. The surface treated filler material product according to claim 1 , wherein the calcium carbonate-comprising filler material is selected from the group consisting of natural ground calcium carbonate, precipitated calcium carbonate, surface-modified calcium carbonate, and mixtures thereof.

4. The surface treated filler material product according claim 1 , wherein the calcium carbonate-comprising filler material is selected from natural ground calcium carbonate, marble, limestone, chalk, dolomite, and mixtures thereof.

5. The surface treated filler material product according to claim 1 , wherein the amount of the bicyclo[2.2.1]heptane-2,3-dicarboxylic acid and/or the monovalent salt of the bicyclo[2.2.1]heptane-2,3-dicarboxylic acid and/or the divalent salt of the bicyclo[2.2.1]heptane-2,3-dicarboxylic acid, in mg, on the accessible surface area of the calcium carbonate-comprising filler material, in m 2 , is from 0.1 mg/m 2 to 30 mg/m 2 .

6. The surface treated filler material product according to claim 1 , wherein the bicyclo[2.2.1]heptane-2,3-dicarboxylic acid and/or the monovalent salt of the bicyclo[2.2.1]heptane-2,3-dicarboxylic acid and/or the divalent salt of the bicyclo[2.2.1]heptane-2,3-dicarboxylic acid is present on the accessible surface area of the calcium carbonate-comprising filler material in an amount of 0.0001 wt.-% to 30 wt.-%, based on the total dry weight of the calcium carbonate-comprising filler material.

7. The surface treated filler material product according to claim 1 , wherein the monovalent salt of the bicyclo[2.2.1]heptane-2,3-dicarboxylic acid is selected from sodium salts, potassium salts, ammonium salts and mixtures thereof and/or the divalent salt of the bicyclo[2.2.1]heptane-2,3-dicarboxylic acid is selected from calcium salts, magnesium salts and mixtures thereof.

8. The surface treated filler material product according to claim 1 , wherein the surface treated filler material product further comprises
(c) at least one hydrophobising agent on at least a part of the accessible surface area of the calcium carbonate-comprising filler material, wherein the amount, in mg, of the at least one hydrophobising agent on at least a part of the accessible surface area of the calcium carbonate-comprising filler material, in m 2 , is from 0.001 to 9 mg/m 2 .

9. The surface treated filler material product according to claim 8 , wherein the at least one hydrophobising agent is selected from the group consisting of an aliphatic carboxylic acid having a total amount of carbon atoms from C 4 to C 24 and/or reaction products thereof, a mono-substituted succinic anhydride consisting of succinic anhydride mono-substituted with a group selected from a linear, branched, aliphatic and cyclic group having a total amount of carbon atoms from at least C 2 to C 30 in the substituent and/or reaction products thereof, a phosphoric acid ester blend of one or more phosphoric acid mono-ester and/or reaction products thereof and one or more phosphoric acid di-ester and/or reaction products thereof, a polyhydrogensiloxane and/or reaction products thereof, an inert silicone oil and/or reaction products thereof, polydimethylsiloxane and/or reaction products thereof, an aliphatic aldehyde and/or reaction products thereof, and mixtures thereof.

10. A process for the preparation of the surface treated filler material product according to claim 1 , comprising the following steps:
(i) providing a calcium carbonate-comprising filler material,
(ii) providing a bicyclo[2.2.1]heptane-2,3-dicarboxylic acid and/or a monovalent salt of the bicyclo[2.2.1]heptane-2,3-dicarboxylic acid and/or a divalent salt of the bicyclo[2.2.1]heptane-2,3-dicarboxylic acid,
(iii) contacting the calcium carbonate-comprising filler material and the bicyclo[2.2.1]heptane-2,3-dicarboxylic acid and/or the monovalent salt of the bicyclo[2.2.1]heptane-2,3-dicarboxylic acid and/or the divalent salt of the bicyclo[2.2.1]heptane-2,3-dicarboxylic acid at a temperature in the range from 157 to 300° C.

11. The process according to claim 10 , wherein the process further comprises a step of
(iv) drying the surface treated filler material product after step (iii), at a temperature in the range from 60 to 200° C., and/or
(v) treating the calcium carbonate-comprising filler material before and/or during and/or after step (iii) or the surface treated filler material product obtained in step (iv) in one or more steps with at least one hydrophobising agent at a temperature from 30 to 200° C., wherein the at least one hydrophobising agent is added in an amount such that the amount, in mg, of the at least one hydrophobising agent on the accessible surface area of the calcium carbonate-comprising filler material, in m 2 , is from 0.001 to 9 mg/m 2 .

12. A master batch comprising the surface treated filler material product according claim 1 and a polyolefin.

13. A process for preparing a master batch comprising steps (i) to (iii) according to claim 11 and optionally steps (iv) and/or (v) according to claim 11 and a further step (I) of incorporating >55 to 90 wt.-% of the surface treated filler material product obtained after step (iii), (iv) or (v) into a polyolefin.

14. A polyolefin composition comprising the surface treated filler material product according to claim 1 .

15. A process for preparing a polyolefin composition comprising steps (i) to (iii) according to claim 10 and optionally steps (iv) and/or (v) and a further step (I) of incorporating 0.01 wt.-% to 55 wt.-% of the surface treated filler material product obtained after step (iii), (iv) or (v) into a polyolefin.

16. The master batch and/or polyolefin composition according to claim 12 , wherein the polyolefin is selected from the group consisting of polybutylene, polypropylene, polyethylene and mixtures thereof.

17. The polyolefin composition according to claim 14 , comprising 0.01 wt.-% to 55 wt.-% of the surface treated filler material product, based on the total weight of the polyolefin composition.

18. An article comprising the polyolefin composition according to claim 16 .

19. The surface treated filler material product according to claim 1 suitable for use as an alpha-nucleating agent for polyolefins.

20. The surface treated filler material product according to claim 1 suitable for use as an alpha-nucleating agent for polypropylene.

Assignees

• Omya Int Ag

Inventors

• Tinkl Michael
• Knerr Michael
• Baradel Franck
• Senti-Wenk Armelle

Classifications

• C08K9/04 Primary

  Ingredients treated with organic substances {(treated with macromolecular compounds C08K9/08)} · CPC title

• C08K13/02

  Organic and inorganic ingredients · CPC title

• C08K5/09

  Carboxylic acids; Metal salts thereof; Anhydrides thereof · CPC title

• C08K2003/265

  Calcium, strontium or barium carbonate · CPC title

• C08L2205/24

  Crystallisation aids · CPC title