Patent EP0739928A2 successfully refreshed from Google Patents.
EP0739928A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Crosslinked emulsions with optimum consistency and handling without thickeners
Assignee: Dow Silicones Corp
•
Filing: 1996-04-17
•
Granted: —
•
Expires: 2016-04-17
Abstract
Abstract A crosslinked polysiloxane dispersion comprising a siloxane polymer, polymer mixture or polymer/solvent mixture, capable of crosslinking via condensation, addition or free radical reactions and having a viscosity of between 5000 and 500,000 mPa·s, if required, 0.1 to 100 weight parts of a crosslinking agent and, if required, depending on the nature of the catalyst and silicon cure system, 0.000001 to 10 weight parts of a catalyst, 0.5 to 10 weight parts of a surfactant or surfactant mixture and 0.5 to 200 weight parts water per 100 weight parts siloxane polymer. Optionally, adhesion promoters, pigments, reinforcing or non-reinforcing fillers, silicone resins, stabilizers, freeze/thaw additives and the like, may also be added to the dispersion.
Inventors
- 👤 Eric Jude Joffre
- 👤 Daniel Trent Berg
- 👤 Donald Taylor Liles
- 👤 Leon Audre Marteaux
- 👤 Nick Evan Shepard
- 👤 Andreas Thomas Franz Wolf
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 10:23
CPC Classifications
C; C08; C08L; C08L83/00; C08J; C08J3/00; C08J3/02; C08J3/03; C08J3/24; C08J3/26; C08K; C08K5/00; C08K5/0091; C08K5/04; C08K5/05; C08K5/057; C08K5/09; C08K5/098; C08K5/56; C08K5/57; C08J2383/00; C08J2383/04
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
222 words
A composition comprising a silicone latex free of rheology modifiers having a plurality of crosslinked polysiloxane particles, wherein said silicone latex has at least 75% silicone content by weight and said silicone latex comprises (a) a crosslinked product of (i) 100 weight parts of a siloxane polymer or polymer mixture having a viscosity of between 5000 and 500,000 mPa·s at 25°C., and (ii) up to 100 weight parts of crosslinker, the siloxane polymer or polymer mixture having at least one polymer species of the following Formula (I): X 3-n R n -YO-(R 1 2 SiO) z -Y-R n X 3-n where n is 0, 1, 2 or 3 and z is an integer from 500 to 5000, X is selected from hydrogen atom, a vinyl group, a hydroxyl group and any condensable or hydrolyzable group, Y is a silicon atom or a Si-(CH 2 ) m -SiR 1 2 group, where m is 1 to 8, R is individually selected from the group consisting of hydrogen atom, aliphatic, alkyl, aminoalkyl, polyaminoalkyl, epoxyalkyl, alkenyl or aromatic groups and R 1 is individually selected from the group consisting of X, hydrogen atom, aliphatic, alkyl, alkenyl and aromatic aryl groups, (b) 0.5 to 10 weight parts of surfactant, (c) 0.5 to 200 weight parts of water and (d) up to 10 weight parts of catalyst.
Claim 2
Independent Claim
261 words
A method of making a silicone latex having a plurality of crosslinked polysiloxane particles, comprising the steps of forming a mixture comprising (a) 100 weight parts siloxane polymer or polymer mixture having a viscosity of between 5000 mPa·s and 500,000 mPa·s at 25°C., the siloxane polymer or polymer mixture having at least one polymer species of the following Formula (I): X 3-n R n -YO-(R 1 2 SiO) z -Y-R n X 3-n where n is 0, 1, 2 or 3 and z is an integer from 500 to 5000, X is selected from hydrogen atom, a vinyl group, a hydroxyl group and any condensable or hydrolyzable group, Y is a silicon atom or a Si-(CH 2 ) m -SiR 1 2 group, where m is 1 to 8, R is individually selected from the group consisting of hydrogen atom, aliphatic, alkyl, aminoalkyl, polyaminoalkyl, epoxyalkyl, alkenyl or aryl aromatic groups and R 1 is individually selected from the group consisting of X, hydrogen atom, aliphatic, alkyl, alkenyl and aryl aromatic groups, (b) 0.5 to 10 weight parts of a surfactant, (c) 0.5 to 200 weight parts water, emulsifying the mixture into a gel phase having a silicone polymer content of at least 85% by weight; diluting the emulsion with further water to a silicon content of at least 75% by weight, adding up to 10 weight parts of catalyst either before or after the emulsification or before or after the dilution; and adding up to 100 weight parts crosslinker either before or after the emulsification or before or after the dilution.
Claim 3
Dependent Claim
50 words
The method of claim 2 wherein the siloxane polymer or polymer mixture includes 1 to 50 weight parts of liquid, branched methylpolysiloxane polymers comprising (CH 3 ) 3 Si 1/2 , (CH 3 ) 2 SiO and CH 3 SiO 3/2 units and containing from 0.1 to 8% hydroxy groups.
Claim 4
Dependent Claim
52 words
The method of claim 2 wherein the siloxane polymer or polymer mixture includes 1 to 50 weight parts of branched methylsiloxane polymeric resins comprising (CH 3 ) 3 Si 1/2 , (CH 3 ) 2 SiO, CH 3 SiO 3/2 and SiO 2 units and containing from 0.1 to 8% hydroxyl groups.
Claim 5
Dependent Claim
23 words
The method of claim 2 wherein the siloxane polymer or polymer mixture includes 1 to 100 weight parts of a compatible organic solvent.
Claim 6
Dependent Claim
17 words
The method of claim 2 comprising the additional step of adding up to 200 weight parts filler.
Claim 7
Dependent Claim
18 words
The method of claim 2 comprising the additional step of adding up to 20 weight parts adhesion promoter.
Claim 8
Dependent Claim
17 words
The method of claim 2 comprising the additional step of adding up to 20 weight parts stabilizer.
Claim 9
Dependent Claim
21 words
The method of claim 2 comprising the additional step of adding up to 20 weight parts of an silsesquioxane resin suspension.
Claim 10
Dependent Claim
20 words
The method of claim 2 comprising the additional step of adding up to 10 weight parts of a catalyst deactivator.
Claim 11
Dependent Claim
57 words
The method of claim 2 wherein the siloxane polymer has at least two hydroxyl, condensable or hydrolyzable groups, the crosslinker has, on average, at least two silicon hydrogen bonds and the catalyst is selected from the group consisting of noble metal complexes, organic acid metal salts, titanic acid esters, amino compounds and their salts and mixtures thereof.
Claim 12
Dependent Claim
62 words
The method of claim 2 wherein the siloxane polymer has at least two silicon-hydrogen bonds, the composition contains a crosslinker which has, on average, at least two hydroxyl, condensable or hydrolyzable groups per molecule and a condensation catalyst selected from the group consisting of noble metal complexes, organic acid metal salts, titanic acid esters, amino compounds and their salts and mixtures thereof.
Claim 13
Dependent Claim
69 words
The method of claim 2 wherein the siloxane polymer has at least two alkenyl groups per molecule bonded to silicon atom and the crosslinker has, an average of at least two silicon-bonded hydrogen atoms, the catalyst is a noble metal catalyst and the crosslinker is a silicon hydride crosslinker present in a amount sufficient to provide at least one hydrogen atom for each vinyl group in the siloxane polymer.
Claim 14
Dependent Claim
43 words
The method of claim 2 wherein the siloxane polymer has at least two hydrogen-silicon bonds, the crosslinker has, on average, at least two alkenyl groups per molecule directly attached to at least one silicon atom and the catalyst is a noble metal catalyst.
Claim 15
Dependent Claim
54 words
The method of claim 2 wherein the siloxane polymer has at least two carboxyalkylsiloxy groups, the crosslinker is an epoxide compound selected from the group consisting of diglycidyl ethers of di- and bis-phenols and the catalyst is selected from the group consisting of (organo)metallic compounds, amino compounds, salts of amino compounds or mixtures thereof.
Claim 16
Dependent Claim
38 words
The method of claim 2 wherein the siloxane polymer has at least two hydroxysiloxy groups and the composition further has at least one crosslinker having on average at least two silacycloalkane groups per molecule and a nucleophilic catalyst.
Claim 17
Dependent Claim
36 words
The method of claim 2 wherein the siloxane polymer has at least two silacycloalkane groups and the composition further includes a crosslinker having on average at least two hydroxyl groups per molecule and a nucleophilic catalyst.
Claim 18
Dependent Claim
37 words
The method of claim 2 wherein the siloxane polymer has at least two silacycloalkane groups and, the composition further has a nucleophilic catalyst and optionally, a crosslinker having on average at least two hydrolyzable groups per molecule.
Claim 19
Dependent Claim
38 words
The method of claim 2 wherein the siloxane polymer has at least two hydroxysiloxy groups and the composition further has at least one crosslinker having on average at least two aza-silacycloalkane groups per molecule and a condensation catalyst.
Claim 20
Dependent Claim
36 words
The method of claim 2 wherein the siloxane polymer has at least two aza-silacycloalkane groups and the composition further includes a crosslinker having on average at least two hydroxyl groups per molecule and a condensation catalyst.
Claim 21
Dependent Claim
37 words
The method of claim 2 wherein the siloxane polymer has at least two aza-silacycloalkane groups and, the composition further has a condensation catalyst and optionally, a crosslinker having on average at least two hydrolyzable groups per molecule.
Claim 22
Dependent Claim
62 words
The method of claim 2 wherein the siloxane polymer has at least two primary or secondary aminosiloxy groups and the composition further contains an optional acrylating agent and the crosslinker contains on average at least two carboxylic anhydride groups and is selected from the group consisting of alkoxysilane, alkoxysiloxane, alkoxysiloxy functional resin, alkoxysilyl functional resin and a siloxane containing carboxylic anhydride groups.
Claim 23
Dependent Claim
67 words
The method of claim 2 wherein the siloxane polymer has at least two hydroxysiloxy or alkoxysiloxy groups, a condensation catalyst and a crosslinker containing on average, at least two reactive silanol groups and where the crosslinker is selected from the group consisting of a. silica, b. silicate, c. siliconate, d. silanolate, e. silanol functional silicone resins, f. silanol functional organic resins, and g. partial condensation products thereof.
Claim 24
Dependent Claim
51 words
The method of claim 6 wherein said filler is selected from the group consisting of colloidal silica, fumed silica, diatomaceous earth, ground quartz, calcium carbonate, carbon black, titanium dioxide, magnesium hydroxide, clay, aluminum oxide, hydrated alumina, expanded vermiculite, zinc oxide, mica, talc, iron oxide, barium sulfate, slaked lime and mixtures thereof.
Claim 25
Dependent Claim
22 words
The method of claim 6 wherein the filler is selected from the group consisting of natural fibers, regenerated fibers and synthetic fibers.
Claim 26
Dependent Claim
28 words
The method of claim 7 wherein the filler is selected from the group consisting of aluminum hydroxide (trihydrate), non-flammable fibers, ceramic or glass fibers or microspheres and vermiculite.
Claim 27
Dependent Claim
37 words
The method of claim 7 wherein the filler is selected from the group consisting of carbon black, metal coated ceramic spheres or fibers, metal coated glass spheres or fibers, uncoated or metal coated graphite fibers or spheres.
Claim 28
Dependent Claim
40 words
The method of claim 9 wherein the stabilizer is an organic amine composed of carbon, hydrogen and nitrogen atoms or carbon, hydrogen, nitrogen and oxygen atoms, said organic amine being soluble in the amount of water present in the emulsion.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.