Ultraviolet curable silicone composition for stereolithography and cured product of same

    公开(公告)号:US11370869B2

    公开(公告)日:2022-06-28

    申请号:US17265025

    申请日:2019-07-11

    摘要: According to the present invention, an ultraviolet curable silicone composition for stereolithography, which contains
    (A) an organopolysiloxane that has two groups represented by formula (1) (wherein each R1 independently represents a monovalent hydrocarbon group having 1-20 carbon atoms; R2 represents an oxygen atom or the like; R3 represents an acryloyloxyalkyl group or the like; p represents a number satisfying 0≤p≤10; and a represents a number satisfying 1≤a≤3) in each molecule, (B) an organopolysiloxane resin that is composed of (a) a unit represented by formula (2) (wherein R1-R3, a and p are as defined above), (b) an R43SiO1/2 unit (wherein each R4 independently represents a monovalent hydrocarbon group having 1-10 carbon atoms) and (c) an SiO4/2 unit, and wherein the molar ratio of the total of the unit (a) and the unit (b) to the unit (c) is within the range of 0.6-1.2:1 and (C) a photopolymerization initiator has a viscosity that is applicable to a stereolithography system such as lifting system and forms a cured product which has excellent physical properties of rubber.

    UV curable silicone adhesive composition and cured product thereof

    公开(公告)号:US11180680B2

    公开(公告)日:2021-11-23

    申请号:US16646743

    申请日:2018-09-19

    摘要: This composition contains (A) 100 parts of an organopolysiloxane having two groups represented by general formula (1) (R1 represents a monovalent hydrocarbon group having 1-20 carbon atoms, R2 represents an oxygen atom or the like, R3 represents an acryloyloxyalkyl group or the like, p represents a number satisfying 0≤p≤10, and “a” represents a number satisfying 1≤a≤3) per molecule, (B) 1-500 parts of a monofunctional (meth)acrylate compound not containing a siloxane structure, (C) 1-5,000 parts of an organopolysiloxane resin containing (a) an R43SiO1/2 unit (in the formula, R4 represents a monovalent hydrocarbon group having 1-10 carbon atoms) and (b) a SiO4/2 unit, where the molar ratio of the unit (a) to the unit (b) is in the range of 0.6 to 1.2:1, (D) 1-100 parts of fine powder silica, and (E) 0.01-20 parts of an optical polymerization initiator. The compound has good shape retention properties and curability for irradiation with ultraviolet light, and provides a cured product which has excellent adhesion suitable for a temporary fixing material.

    Ultraviolet-curable pressure-sensitive silicone adhesive composition and cured object obtained therefrom

    公开(公告)号:US11124680B2

    公开(公告)日:2021-09-21

    申请号:US16619850

    申请日:2018-05-07

    摘要: An ultraviolet-curable pressure-sensitive silicone adhesive composition which comprises: 100 parts of an organopolysiloxane (A) having, in the molecule, two groups represented by general formula (1) (wherein R1 represents a C1-20 monovalent hydrocarbon group, R2 represents an oxygen atom, etc., R3 represents an acryloyloxyalkyl group, etc., p and a respectively indicate numbers satisfying 0≤p≤10 and 1≤a≤3); 1-500 parts of a monofunctional (meth)acrylate compound (B) containing no siloxane structure and/or a polyfunctional (meth)acrylate compound (C) containing no siloxane structure; 1-5,000 parts of an oranopolysiloxane resin (D) comprising R43SiO1/2 units (a) (wherein R4 represents a C1-10 monovalent hydrocarbon group) and SiO4/2 units (b), the (a)/(b) molar ratio being (0.6-1.2)/1; and 0.01-20 parts of a photopolymerization initiator (E). This composition has satisfactory applicability and curability and gives a cured object which, when used as a temporary fixer, has excellent tackiness and strength.