Invention Grant
- Patent Title: Aqueous coating composition with soft touch upon drying
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Application No.: US17109128Application Date: 2020-12-01
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Publication No.: US11332638B2Publication Date: 2022-05-17
- Inventor: Roel Johannes Marinus Swaans , Ronald Tennebroek , Gerardus Cornelis Overbeek , Paul de Kok
- Applicant: COVESTRO (NETHERLANDS) B.V.
- Applicant Address: NL Nieuwegein
- Assignee: COVESTRO (NETHERLANDS) B.V.
- Current Assignee: COVESTRO (NETHERLANDS) B.V.
- Current Assignee Address: NL Nieuwegein
- Agency: Nixon & Vanderhye P.C.
- Priority: EP14200188 20141223
- Main IPC: B05D3/02
- IPC: B05D3/02 ; B05D3/00 ; B05D1/40 ; C08F2/00 ; C08G61/04 ; C09D175/08 ; C08G18/48 ; C08J3/03 ; C08G18/75 ; C08G18/79 ; C08G18/08 ; C08G18/10 ; C08G18/22 ; C08L75/08 ; C08G18/32

Abstract:
Aqueous coating compositions include dispersed polyurethane-vinyl polymer hybrid particles obtained by free-radical polymerization of at least one vinyl monomer in the presence of a polyurethane. The polyurethane and the vinyl polymer in the hybrid particles are present in a weight ratio of polyurethane to vinyl polymer ranging from 1:1 to 20:1, and the polyurethane is the reaction product of at least the following components: (a) from 5 to 40 wt. % of at least one organic difunctional isocyanate, (b) from 0.5 to 4 wt. % of an isocyanate-reactive compound containing ionic or potentially ionic water-dispersing groups having a molecular weight of from 100 to 500 g/mol, (c) from 40 to 80 wt. % of at least one diol having a molecular weight from 500 to 5000, (d) from 0 to 10 wt. % of at least one active-hydrogen chain extending compound with a functionality of at least 2 other than water, (e) from 0 to 10 wt. % of at least one diol having a molecular weight below 500 g/mol. The isocyanate and hydroxy groups on the components used are present in a respective mole ratio (NCO to OH) in the range of from 0.8:1 to 5:1.
Public/Granted literature
- US20210087427A1 AQUEOUS COATING COMPOSITION WITH SOFT TOUCH UPON DRYING Public/Granted day:2021-03-25
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