Patents by Inventor Rita Cannas

Rita Cannas has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11097259
    Abstract: A compound containing at least one hexahydrotriazine unit of formula (I) having at least one amidine or guanidine group and to the use thereof as a catalyst for the crosslinking of a functional compound, in particular a polymer including silane groups. The compound contains at least one hexahydrotriazine unit of formula (I) is producible in a simple process from readily available feedstocks, odorless at room temperature, non-volatile and largely non-toxic. The compound accelerates the crosslinking of functional polymers surprisingly well and by simple variation of the substituents is variable such that it has very good compatibility in different polymers as a result of which such compositions do not have a propensity for migration-based defects such as separation, exudation or substrate contamination.
    Type: Grant
    Filed: July 17, 2017
    Date of Patent: August 24, 2021
    Assignee: SIKA TECHNOLOGY AG
    Inventors: Rita Cannas, Urs Burckhardt
  • Publication number: 20210179904
    Abstract: A moisture-curing, condensation-crosslinking silicone composition that can be used as elastic adhesives and sealants. The silicone composition shows homogeneous depth curing, such that it cures through even under movement without forming cracks. The silicone composition contains at least one polyorganosiloxane having Si(OR3)3 end groups, at least one condensation catalyst and at least one crosslinker having hydrolyzable radicals, characterized in that the polymer end groups Si(OR3) have a reaction rate in the crosslinking reaction that is at least equal to and preferably higher than the hydrolyzable radicals of the at least one crosslinker.
    Type: Application
    Filed: August 23, 2019
    Publication date: June 17, 2021
    Applicant: SIKA TECHNOLOGY AG
    Inventors: Manuel FRIEDEL, Rita CANNAS, Nicolas DANGLETERRE
  • Publication number: 20210163667
    Abstract: Curable compositions include at least one organic polymer which contains silane groups and/or isocyanate groups, at least one compound which contains acetal groups and has a molecular weight of at least 280 g/mol, and at least one basic catalyst. The composition is particularly storage-stable and can be readily processed. Using moisture the composition cures rapidly, and with very little residual tackiness, to form a resilient material that has good adhesive and mechanical properties, in particular a high level of malleability and elasticity, is heat resistant and exhibits hardly any odour formation or migration effects. In particular, the composition has very consistent product properties during storage in respect of viscosity, curing rate and odour.
    Type: Application
    Filed: January 24, 2019
    Publication date: June 3, 2021
    Applicant: SIKA TECHNOLOGY AG
    Inventors: Andreas KRAMER, Urs BURCKHARDT, Rita CANNAS
  • Patent number: 10995074
    Abstract: An amidine containing at least one structural unit of the formula (I) and the use thereof as catalyst for the crosslinking of a functional compound, especially of a polymer having silane groups. The amidine is preparable in a simple process from readily available starting materials, is largely odorless at room temperature and is of low toxicity. It accelerates the crosslinking of functional compounds surprisingly efficiently and can be adjusted for optimal compatibility with different compositions via the radical to which the structural units of the formula (I) is bonded, which means that such compositions do not have a tendency to migration-related defects such as separation, exudation or substrate soiling.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: May 4, 2021
    Assignee: SIKA TECHNOLOGY AG
    Inventors: Rita Cannas, Urs Burckhardt
  • Patent number: 10836868
    Abstract: A conversion product which has at least one aliphatic amidine or guanidine group and at least one polysiloxane radical, and the use of the conversion product as a catalyst for cross-linking hardenable compositions, in particular based on polymers containing silane groups. The conversion product is largely odor-free, non-volatile, and of low toxicity. The conversion product accelerates the cross-linking of such compositions surprisingly well, does not impair the stability of such compositions in storage, and is very highly compatible, which means that such compositions do not tend toward separation or migration or evaporation of the catalyst.
    Type: Grant
    Filed: December 14, 2016
    Date of Patent: November 17, 2020
    Assignee: SIKA TECHNOLOGY AG
    Inventors: Rita Cannas, Urs Burckhardt
  • Publication number: 20200248041
    Abstract: An activator composition having a) between 0.5% and 50% by weight of a catalyst K for crosslinking two-component adhesives which is liquid at 23° C., b) between 40% and 99.5% by weight of an organic solvent L, c) between 0% and 10% by weight of at least one silane S including at least one hydrolyzable silane group and preferably at least one functional group selected from mercapto, epoxy, amino, methacryloyl, vinyl and alkyl group. The activator composition is storage stable for at least one month. The activator composition is moreover active independently of the applied amount and may be applied in layers having a thickness such that the adhesive may be applied after not more than 30 seconds.
    Type: Application
    Filed: September 18, 2018
    Publication date: August 6, 2020
    Applicant: SIKA TECHNOLOGY AG
    Inventors: Claudia JUNG, Martin DEMMIG, Rita CANNAS
  • Publication number: 20200231548
    Abstract: The present invention relates to an amidine of the formula (I) and its use as a catalyst for crosslinking a curable composition. The amidine of the formula (I) contains at least one aliphatic amidine group. It is substantially odorless and nonvolatile at room temperature and accelerates the crosslinking of curable compositions very efficiently, without impairing the storage stability of the compositions. It is particularly suitable for compositions based on polymers containing silane groups, with which it is compatible, as a result of which such compositions do not have a tendency to separation or migration or evaporation of the catalyst.
    Type: Application
    Filed: April 8, 2020
    Publication date: July 23, 2020
    Applicant: SIKA TECHNOLOGY AG
    Inventors: Rita CANNAS, Urs BURCKHARDT
  • Patent number: 10647681
    Abstract: The present invention relates to an amidine of the formula (I) and its use as a catalyst for crosslinking a curable composition. The amidine of the formula (I) contains at least one aliphatic amidine group. It is substantially odorless and nonvolatile at room temperature and accelerates the crosslinking of curable compositions very efficiently, without impairing the storage stability of the compositions. It is particularly suitable for compositions based on polymers containing silane groups, with which it is compatible, as a result of which such compositions do not have a tendency to separation or migration or evaporation of the catalyst.
    Type: Grant
    Filed: June 21, 2016
    Date of Patent: May 12, 2020
    Assignee: SIKA TECHNOLOGY AG
    Inventors: Rita Cannas, Urs Burckhardt
  • Publication number: 20200048189
    Abstract: A guanidine of the formula (I) and to the use thereof as catalyst for the crosslinking of a functional compound, especially a polymer having silane groups. The guanidine of the formula (I) described is preparable in a simple method via a polyfunctional carbodiimide adduct from the readily available raw materials, and is largely odorless at room temperature and of low toxicity. In spite of its comparatively high molecular weight, it accelerates the crosslinking of functional compounds surprisingly well, and such compositions do not have a tendency to migration-related defects such as separation, exudation or substrate soiling.
    Type: Application
    Filed: March 14, 2018
    Publication date: February 13, 2020
    Applicant: SIKA TECHNOLOGY AG
    Inventors: Rita CANNAS, Urs BURCKHARDT
  • Patent number: 10414875
    Abstract: The use of a catalyst of the formula (I) for the crosslinking of a curable composition. The catalyst of the formula (I) contains at least one aliphatic guanidine group. It is substantially odorless and nonvolatile at room temperature and accelerates the crosslinking of curable compositions very efficiently, without impairing the storage stability thereof. It is particularly suitable for compositions based on polymers containing silane groups, where it has very good compatibility, as a result of which such compositions do not have a tendency to separation or migration or evaporation of the catalyst.
    Type: Grant
    Filed: May 10, 2016
    Date of Patent: September 17, 2019
    Assignee: SIKA TECHNOLOGY AG
    Inventors: Rita Cannas, Urs Burckhardt
  • Publication number: 20190276412
    Abstract: An amidine containing at least one structural unit of the formula (I) and the use thereof as catalyst for the crosslinking of a functional compound, especially of a polymer having silane groups. The amidine is preparable in a simple process from readily available starting materials, is largely odorless at room temperature and is of low toxicity. It accelerates the crosslinking of functional compounds surprisingly efficiently and can be adjusted for optimal compatibility with different compositions via the radical to which the structural units of the formula (I) is bonded, which means that such compositions do not have a tendency to migration-related defects such as separation, exudation or substrate soiling.
    Type: Application
    Filed: December 12, 2017
    Publication date: September 12, 2019
    Applicant: SIKA TECHNOLOGY AG
    Inventors: Rita CANNAS, Urs BURCKHARDT
  • Patent number: 10392480
    Abstract: The use of an amidine of formula (I) and/or a conversion product thereof as a catalyst for the crosslinking of a composition based on silane group-containing polymers. The amidine of formula (I) and the conversion products thereof are essentially odorless at room temperature and non-volatile and accelerate the crosslinking of the composition very well without impairing the storage stability of the composition, and are very compatible in the composition. As a result, the compositions do not have a tendency to separate, migrate or evaporate the catalyst.
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: August 27, 2019
    Assignee: SIKA TECHNOLOGY AG
    Inventors: Rita Cannas, Urs Burckhardt
  • Publication number: 20190240649
    Abstract: A compound containing at least one hexahydrotriazine unit of formula (I) having at least one amidine or guanidine group and to the use thereof as a catalyst for the crosslinking of a functional compound, in particular a polymer including silane groups. The compound contains at least one hexahydrotriazine unit of formula (I) is producible in a simple process from readily available feedstocks, odorless at room temperature, non-volatile and largely non-toxic. The compound accelerates the crosslinking of functional polymers surprisingly well and by simple variation of the substituents is variable such that it has very good compatibility in different polymers as a result of which such compositions do not have a propensity for migration-based defects such as separation, exudation or substrate contamination.
    Type: Application
    Filed: July 17, 2017
    Publication date: August 8, 2019
    Applicant: SIKA TECHNOLOGY AG
    Inventors: Rita CANNAS, Urs BURCKHARDT
  • Patent number: 10246545
    Abstract: Invention relates to bismuth-containing catalysts, obtainable by reacting at least one bismuth(III) salt or bismuth(III) complex with at least one 1,3-ketoamide with the formula (I). Such complex compounds are suited in particular as catalysts for one- and two-component polyurethane compositions. The invention further relates to two-component polyurethane compositions, including at least one polyisocyanate as the first component, at least one polyol as the second component, and at least one such bismuth-containing catalyst. The invention further relates one-component polyurethane compositions, including at least one polyurethane prepolymer having isocyanate groups, produced from at least one polyisocyanate with at least one polyol, and one such bismuth-containing catalyst. The invention also relates to various uses of the aforementioned polyurethane compositions.
    Type: Grant
    Filed: December 12, 2012
    Date of Patent: April 2, 2019
    Assignee: SIKA TECHNOLOGY AG
    Inventors: Urs Burckhardt, Rita Cannas
  • Publication number: 20180327549
    Abstract: A conversion product which has at least one aliphatic amidine or guanidine group and at least one polysiloxane radical, and the use of the conversion product as a catalyst for cross-linking hardenable compositions, in particular based on polymers containing silane groups. The conversion product is largely odor-free, non-volatile, and of low toxicity. The conversion product accelerates the cross-linking of such compositions surprisingly well, does not impair the stability of such compositions in storage, and is very highly compatible, which means that such compositions do not tend toward separation or migration or evaporation of the catalyst.
    Type: Application
    Filed: December 14, 2016
    Publication date: November 15, 2018
    Applicant: SIKA TECHNOLOGY AG
    Inventors: Rita CANNAS, Urs BURCKHARDT
  • Patent number: 10100068
    Abstract: A silane of the formula (I) containing at least one aliphatic amidine group- or guanidine group-containing alkoxy group, to a method for producing same, to conversion products thereof, and to the use thereof as a catalyst in curable compositions, in particular based on silane group-containing polymers. The silane of the formula (I) is largely odorless and non-volatile at room temperature. The silane accelerates the hydrolysis and condensation reaction of silane groups very effectively without impairing the storage stability of silane group-containing polymers. Additionally, the silane is very tolerable in silane group-containing compositions, whereby such compositions are not prone to separate, migrate, or evaporate the catalyst.
    Type: Grant
    Filed: April 16, 2015
    Date of Patent: October 16, 2018
    Assignee: SIKA TECHNOLOGY AG
    Inventors: Urs Burckhardt, Rita Cannas
  • Patent number: 10100069
    Abstract: The invention relates to a composition comprising at least one organic polymer that contains silane groups and at least one catalyst of formula (I). The composition is low in emissions and low-odor, has a good shelf-life, cures rapidly to form a mechanically high-quality, durable material with a very low propensity for migration-related defects such as exudation or dirt retention by the substrate. The composition is particularly suitable for use as an adhesive, sealant or coating.
    Type: Grant
    Filed: April 16, 2015
    Date of Patent: October 16, 2018
    Assignee: SIKA TECHNOLOGY AG
    Inventors: Urs Burckhardt, Rita Cannas
  • Publication number: 20180179165
    Abstract: The present invention relates to an amidine of the formula (I) and its use as a catalyst for crosslinking a curable composition. The amidine of the formula (I) contains at least one aliphatic amidine group. It is substantially odorless and nonvolatile at room temperature and accelerates the crosslinking of curable compositions very efficiently, without impairing the storage stability of the compositions. It is particularly suitable for compositions based on polymers containing silane groups, with which it is compatible, as a result of which such compositions do not have a tendency to separation or migration or evaporation of the catalyst.
    Type: Application
    Filed: June 21, 2016
    Publication date: June 28, 2018
    Applicant: SIKA TECHNOLOGY AG
    Inventors: Rita CANNAS, Urs BURCKHARDT
  • Publication number: 20180171082
    Abstract: The use of an amidine of formula (I) and/or a conversion product thereof as a catalyst for the crosslinking of a composition based on silane group-containing polymers. The amidine of formula (I) and the conversion products thereof are essentially odourless at room temperature and non-volatile and accelerate the crosslinking of the composition very well without impairing the storage stability of the composition, and are very compatible in the composition. As a result, the compositions do not have a tendency to separate, migrate or evaporate the catalyst.
    Type: Application
    Filed: April 15, 2016
    Publication date: June 21, 2018
    Applicant: SIKA TECHNOLOGY AG
    Inventors: Rita CANNAS, Urs BURCKHARDT
  • Patent number: 9988482
    Abstract: A catalyst containing at least one amidine or guanidine group of formula (Ia) or (Ib), which is bound to a silicon atom of a siloxane residue. At room temperature, the catalyst is liquid and odorless. It is particularly suitable as a cross-linking catalyst for curable compositions, in particular for silane group-containing compositions. It is particularly good at accelerating the hardening of such compositions without impairing stability in storage, and displays little volatility but good compatibility. As a result, the compositions do not tend towards separation or migration or evaporation of the catalyst.
    Type: Grant
    Filed: June 15, 2015
    Date of Patent: June 5, 2018
    Assignee: SIKA TECHNOLOGY AG
    Inventors: Urs Burckhardt, Rita Cannas