Inorganic material composition and utilities thereof

Patent metadata

Field	Value
Publication number	US-2019135650-A1
Application number	US-201716095467-A
Country	US
Kind code	A1
Filing date	Apr 21, 2017
Priority date	Apr 22, 2016
Publication date	May 9, 2019
Grant date	—

Abstract

Inorganic particulate compositions containing inorganic particles associated with a copolymer of a hydrophilic monomer and a hydrophobic monomer associated with the inorganic particles are provided. The particulate composition satisfies at least one of the following properties:
a BET surface area of the inorganic particles is greater than 8 m 2 /g, a Hegman value of the inorganic particles is 75 microns or less, and

a rate of water loss from the composition upon drying from a moisture level greater than 2% wt % is at least 30% greater than a composition having a corresponding content of a polyacrylate polymer associated with the particles. A method to prepare the composition and formulations for inks, paints, coatings and filled polymeric articles containing the inorganic particulate composition are also provided.

First claim

1 . A particulate composition, comprising:
particles of an inorganic material; and a copolymer of a hydrophilic monomer and a hydrophobic monomer associated with the inorganic particles; wherein the particulate composition satisfies at least one of the following properties: a BET surface area of the inorganic particles is greater than 8 m 2 /g, a Hegman value of the inorganic particles is 75 microns or less, and a rate of water loss from the composition upon drying from a moisture level greater than 2% wt % is at least 30% greater than a composition having a corresponding content of a polyacrylate polymer associated with the particles.

2 . The particulate composition of claim 1 , wherein a moisture pick-up of the particulate composition is 1.0 wt % or less when exposed to 98% relative humidity for 24 hours at 23° C.

3 . The particulate composition of claim 1 , wherein a content of the copolymer is from 0.05 to 10 mass % relative to the mass of the inorganic material.

4 . The particulate composition of claim 1 , wherein a mole ratio of the hydrophobic monomer to the hydrophilic monomer is from 10/1 to 1/1.

5 . The particulate composition of claim 1 , wherein the hydrophobic monomer comprises at least one side chain having from 3 to 10 carbons.

6 . The particulate composition of claim 5 , wherein
the hydrophobic monomer is at least one selected from the group consisting of a (meth)acrylate ester, an alkene, a vinyl ester, a vinyl ether, styrene, an alkyl substituted styrene, a vinyl pyrrole, a terpene, an indene and an alkyl substituted (meth)acrylamide.

7 . The particulate composition of claim 5 , wherein
the hydrophobic monomer is a 1-alkene.

8 . The particulate composition of claim 7 , wherein the 1-alkene is at least one selected from the group consisting of 1-pentene, 1-hexene, 1-heptene, 1-octene, isobutylene and di-isobutylene.

9 . The particulate composition of claim 1 , wherein the hydrophilic monomer comprises a functionality selected from the group consisting of carboxylate, carboxylic acid anhydride, sulfonate and phosphonate.

10 . The particulate composition of claim 9 , wherein
the hydrophilic monomer comprises a carboxylate group or a carboxylic acid anhydride.

11 . The particulate composition of claim 10 , wherein
the hydrophilic monomer is selected from the group consisting of acrylic acid, methacrylic acid, angelic acid, itaconic acid, crotonic acid, isocrotonic acid, fumaric acid, maleic acid, maleic anhydride, glutaconic acid, glutaconic anhydride, aconitic acid and mesaconic acid.

12 . The particulate composition of claim 10 , wherein the hydrophilic monomer comprises a carboxylate group and the carboxylate group is of a salt comprising at least one of a sodium ion, a potassium ion, an ammonium ion, a calcium ion and a magnesium ion.

13 . The particulate composition of claim 12 , wherein from 30 to 100% of the carboxylate groups are in a salt form.

14 . The particulate composition of claim 1 wherein an average molecular weight of the copolymer is from 5,000 to 40,000 g/mol.

15 . The particulate composition of claim 1 , wherein the inorganic material is an alkaline earth metal carbonate.

16 . The particulate composition of claim 15 , wherein the alkaline earth metal carbonate comprises at least one selected from the group consisting of a carbonate of calcium, a carbonate of magnesium, a carbonate of barium and a carbonate of strontium.

17 . The particulate composition of claim 1 , wherein the inorganic particles are further modified with a surface treatment agent selected from the group consisting of caproic acid, 2-ethylhexanoic acid, caprylic acid, neodecanoic acid, capric acid, valeric acid, lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, lignoceric acid, tall oil fatty acid, napthenic acid, montanic acid, coronaric acid, linoleic acid, linolenic acid, 4,7,10,13,16,19-docosahexaenoic acid, 5,8,11,14,17-eicosapentaenoic acid, hexanoic acid, heptanoic acid, octanoic acid, nonanoic acid, and isononanoic acid.

18 . The particulate composition of claim 1 , wherein the hydrophilic monomer is maleic anhydride and/or maleic acid and the hydrophobic monomer is diisobutylene.

19 . The particulate composition of claim 1 , wherein a BET surface area of the inorganic particles is between 2.5 m 2 /g and 6 m 2 /g.

20 . The particulate composition of claim 1 , wherein the inorganic material comprises one or more materials selected from the group consisting of:
an alkaline earth metal carbonate; a hydrous kalonitite clay; an anhydrous kaolinite clay; a talc, mica, perlite, bentonite, feldspar, wollastonite, diatomaceous earth, alumina, magnesium hydroxide, or aluminium trihydrate; and combinations thereof.

21 - 80 . (canceled)

Assignees

• Imerys Usa Inc

Inventors

• Singh Virendra
• Paynter Christopher
• Gittins David
• Shurling Dickey
• Wicks Douglas
• Preston Janet
• Findlay Andrew

Classifications

• C08K3/26

  Carbonates; Bicarbonates · CPC title

• C09D11/105

  Alkyd resins · CPC title

• C09D11/08

  based on natural resins · CPC title

• C09C1/405

  containing combined silica, e.g. mica · CPC title

• C01P2004/61

  Micrometer sized, i.e. from 1-100 micrometer · CPC title