# US 12,006,394 B2 · Curable composition of low density

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- Number: US 12,006,394 B2
- Document ID: US12006394B2
- Status: Granted
- Kind: B2
- Application number: 17/274,617
- Filed: 2019-10-02
- Published: 2022-02-17
- Granted: 2024-06-11
- Earliest claimed: 2018-10-03
- Assignees: Sika Technology AG
- Applicants: Sika Technology AG
- Inventors: Klaas Mennecke; Daniele Rutz; Sara Stauber-Fedier; Berzad Durmic
- Web page: https://patentgrep.com/patent/US12006394B2

## CPC

- C08G 18/307: {Atmospheric humidity}
- C08G 18/10: Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
- C08G 18/242: {organometallic compounds containing tin-carbon bonds}
- C08G 18/341: {Dicarboxylic acids, esters of polycarboxylic acids containing two carboxylic acid groups}
- C08G 18/3893: {containing silicon}
- C08G 18/4825: {Polyethers containing two hydroxy groups (C08G18/4833 - C08G18/5096 take precedence)}
- C08G 18/4845: {containing oxypropylene or higher oxyalkylene end groups}
- C08G 18/755: {and at least one isocyanate or isothiocyanate group linked to a secondary carbon atom of the cycloaliphatic ring, e.g. isophorone diisocyanate}
- C08K 3/04: Carbon
- C08K 3/22: of metals
- C08K 3/26: Carbonates; Bicarbonates
- C08K 3/36: Silica
- C08K 7/28: Glass
- C09J 175/08: from polyethers
- C08G 2150/00: Compositions for coatings
- C08G 2170/00: Compositions for adhesives
- C08G 2190/00: Compositions for sealing or packing joints
- C08K 2003/2241: {Titanium dioxide}
- C08K 2003/265: {Calcium, strontium or barium carbonate}
- C08K 2201/003: Additives being defined by their diameter
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H)

## Abstract

A moisture-curing composition including a) at least one moisture-reactive polymer P with a proportion of 10% to 60% by weight, based on overall composition, b) at least one inorganic filler F with a proportion of at least 9% by weight, based on overall composition, c) between 3% and 25% by weight, based on overall composition, of at least one type of microscopic hollow beads H, wherein composition has density of less than 1.20 kg/l, and microscopic hollow beads H have compressive strength, measured to ASTM D3102-72, of at least 2.5 MPa, and microscopic hollow beads H have a volume-based particle size D90, measured by Coulter counter, of less than 100 μm.

## Claims

### Claim 1

A moisture-curing composition comprising
a) at least one moisture-reactive polymer P in a proportion of 10% to 60% by weight, based on the total composition,
b) at least one inorganic filler F in a proportion of at least 9% by weight, based on the total composition, and
c) between 3% and 25% by weight, based on the total composition, of at least one type of hollow microsphere H,
wherein:
the composition has a density of less than 1.20 kg/L, and
the hollow microspheres H have:
a compressive strength, measured in accordance with ASTM D3102-72, of at least 2.5 MPa, and
a volume-based particle size D90, measured with a Coulter counter, of less than 100 μm.

### Claim 2 (depends on 1)

The moisture-curing composition as claimed in claim 1, wherein the hollow microspheres H are hollow glass spheres having a diameter of not more than 110 μm.

### Claim 3 (depends on 1)

The moisture-curing composition as claimed in claim 1, wherein the at least one inorganic filler F is selected from the group consisting of precipitated or ground chalk, precipitated or fumed silica, titanium dioxide, or combinations of said fillers.

### Claim 4 (depends on 1)

The moisture-curing composition as claimed in claim 1, wherein the moisture-reactive polymer P comprises at least one polyurethane polymer PU, wherein the polyurethane polymer PU has free or latent isocyanate groups and the composition in addition optionally comprises a latent curing agent for isocyanate groups.

### Claim 5 (depends on 1)

The moisture-curing composition as claimed in claim 1, wherein the moisture-reactive polymer P comprises at least one silane-functional polymer STP.

### Claim 6 (depends on 5)

The moisture-curing composition as claimed in claim 5, wherein the silane-functional polymer STP has end groups of the formula (II)
where
R14 is a linear or branched monovalent hydrocarbyl radical having 1 to 5 carbon atoms; R15 is a linear or branched monovalent hydrocarbyl radical having 1 to 8 carbon atoms;
x has a value of 0 or 1 or 2;
R16 is a linear or branched divalent hydrocarbyl radical having 1 to 12 carbon atoms that optionally has cyclic and/or aromatic moieties and optionally one or more heteroatoms; and
T is a divalent radical selected from —O—, —S—, —N(R7)—, —O—CO—N(R17)—, —N(R17)—CO—O— and —N(R17)—CO—N(R17)—,
where R17 is a hydrogen radical or a linear or branched hydrocarbyl radical having 1 to 20 carbon atoms that optionally has cyclic moieties and that optionally has an alkoxysilane, ether or carboxylic ester group.

### Claim 7 (depends on 1)

The moisture-curing composition as claimed in claim 1, wherein the composition additionally comprises at least one additive, wherein the additive is selected from the list consisting of plasticizers, curing catalysts, stabilizers, thixotropic agents, adhesion promoters, and desiccants.

### Claim 8 (depends on 1)

The moisture-curing composition as claimed in claim 1, wherein the composition contains at least 25% by weight of inorganic filler F, based on the total composition.

### Claim 9 (depends on 1)

The moisture-curing composition as claimed in claim 1, wherein the composition additionally contains between 1% and 25% by weight of carbon black, based on the total composition.

### Claim 10 (depends on 1)

The moisture-curing composition as claimed in claim 1, wherein the composition comprises 9% to 15% by weight of inorganic filler F, based on the total composition, and also 5% to 15% by weight of hollow microspheres H, based on the total composition.

### Claim 11 (depends on 1)

The moisture-curing composition as claimed claim 1, wherein the composition exhibits a fire retardancy class C as defined in DIN EN 13501-1 after curing.

### Claim 12 (depends on 1)

A built structure or article of manufacture that has been bonded, sealed or coated with the moisture-curing composition as claimed in claim 1.

### Claim 13 (depends on 1)

A cured composition of the moisture curing composition as claimed in claim 1.

### Claim 14 (depends on 1)

The moisture-curing composition as claimed claim 1, wherein the composition has a density of less than 1.10 kg/L.

### Claim 15 (depends on 1)

The moisture-curing composition as claimed claim 1, wherein the composition contains from 9% to 50% by weight of inorganic filler F, based on the total composition.

### Claim 16 (depends on 1)

The moisture-curing composition as claimed claim 1, wherein the composition contains from 9% to 40% by weight of inorganic filler F, based on the total composition.

### Claim 17 (depends on 1)

The moisture-curing composition as claimed claim 1, wherein the composition contains from 9% to 14.4% by weight of inorganic filler F, based on the total composition.