Patent ID: 11964425
Assignee: ELKEM SILICONES USA CORP.
Field: Other special machines (Mechanical engineering)
Classification: CPC B  C | IPC B  C

Claim 0:
1. A method for producing a three-dimensional printed article comprising
1) providing a photocurable composition X, comprising:
(a) for 100 parts by weight of at least one organopolysiloxane polymer CE having the following formula (1):

M*DxM*  (1)

wherein:
M* is: R1(R)2SiO1/2;
D is (R)2SiO2/2;
x≥60,
R is an alkyl group chosen from the group consisting of methyl, ethyl, propyl, trifluoropropyl, and phenyl,
R1 is a moiety of general formula —CnH2nO—CH2CHR2(CH2)m—OCOCH═CHR3, wherein n is 3 or 4 and m is 0 or 1, R2 is H, OH or —CzH2z—CH2OH, z is 1, 2 or 3 and R3 is H or —CH3;

(b) from 0 parts to 20 parts by weight, of at least one organopolysiloxane polymer XL having the following formula (2):

MDv(DACR)wM  (2)

wherein
M is: R2(R)2SiO1/2; (R)3SiO1/2 or R4(R)2SiO1/2 
D is (R)2SiO2/2;
DACR is (R2)(R)SiO2/2;
v is from 0 to 500,
w is from 0 to 50, and when w=0, v is from 1 to 500 and M represents: R2(R)2SiO1/2 or R4(R)2SiO1/2;
R is an alkyl group chosen from the group consisting of methyl, ethyl, propyl, trifluoropropyl, and phenyl,
R2 is a moiety of the following general formulas:
 —CnH2nO—CH2CHR2(CH2)m—OCOCH═CHR3, wherein n is 3 or 4, m is 0 or 1, R2 is H, OH or —CzH2z—CH2OH, z is 1, 2 or 3 and R3 is H or —CH3; or
 —CnH2nO—COCH═CHR3, wherein n is 3 or 4 and R3 is H or —CH3;
R4 is a moiety of formula (3):, (c) from 0.01 to 10 parts by weight of at least one photoinitiator PI,
(d) from 20 parts to 100 parts by weight of at least one inorganic filler F,
(e) from 0 to 10 parts by weight of at least one sensitizer PS,
(f) from 0 to 10000 parts by weight of at least one photocurable organic (meth)acrylate-monomer/oligomer M, and
(g) from 0 to 10 parts by weight of at least one additive I;

2) exposing the photocurable composition X to actinic radiation to form a cured cross-section on a plate or support, and
3) repeating steps 1) and 2) on the former cured cross section with new layer to build up the three-dimensional printed article.