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"Star Branched Silicone Polymers As Anti Mist Additive For Coating Applications"

Abstract: A hydrido-silicone is incompletely reacted with (preferably) a long chain olefin under hydrosilylation conditions to produce a partially substituted hydrido-silicone that is further reacted under hydrosilylation conditions with a vinyl containing MQ resin to partially consume the remaining hydride species which is then reacted under hydrosilylation conditions to consume the remaining hydride species with a long chain diolefin to produce a composition that is useful as an anti-mist agent in the coating of flexible supports.

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Notices, Deadlines & Correspondence

Patent Information

Application #
Filing Date
21 May 2008
Publication Number
33/2008
Publication Type
INA
Invention Field
POLYMER TECHNOLOGY
Status
Email
Parent Application

Applicants

GENERAL ELECTRIC COMPANY
1RIVER ROAD, SCHENECTADY, NY 12345 USA.

Inventors

1. KILGOUR JOHN ALFRED,
18 ROHAL OAK DRIVE, CLIFTON PARK, NY 12065 USA.
2. CUA EDWIN C
501 WALNUT DRIVE, CLIFTON PARK, NY 12065 USA.
3. CUMMINGS JOHN A
8 YANDELL YARD, GANSEVOORT, NY 12831 USA.

Specification

STAR-BRANCHED SILICONE POLYMERS AS ANTI - MIST ADDITIVES FOR COATING APPLICATIONS FIELD OF USE The present invention relates to coating flexible materials or supports such as sheets of paper or other polymeric material, either woven or non-woven, with a silicone composition. The present invention also relates to the coating of flexible materials or supports with liquid compositions comprising one or more cross-linkable polyorganosiloxanes wherein such polyorganosiloxanes are cross-linkable by an addition reaction, a condensation reaction, a cationic reaction, or a free-radical reaction. The present invention also relates to star branched polyorganosiloxanes (silicone polymers) that reduce misting during the application of the silicone composition (polyorganosiloxane) to the flexible material or support. The flexible support may be paper, cardboard, plastic film, metal film and the like. Some exemplary applications are paper for foodstuffs, adhesive labels, adhesive tapes, seals and the like. BACKGROUND OF THE INVENTION The coating of flexible supports with liquid silicones is typically carried out on coating devices that operate continuously at very high speed. These devices usually comprise coating heads composed of several rolls, including in particular a pressure roll and a coating roll that are continuously fed with a silicone composition that may or may not be cross-linkable, by means of a series of rolls that are placed next to one another. A strip of flexible support of the desired material to be coated is fed at high speed between the pressure roll and the coating roll to be coated on at least one of its surfaces. When it is intended to cross link the silicone coating, apparatus to implement a cross linking reaction are positioned downstream of the coating head. The apparatus that implements cross-linking may be for example an oven or an emitter of radiation, e.g. ultiaviolet (UV) radiation or an emitter of a beam of electrons (EB). High speed coating of flexible supports with silicones has been associated with problems associated with the transfer of the silicone liquid (or fluid) from the coating roll to the flexible support, which moves forward through the coating apparatus. One of the particular problems associated with transfer of the silicone liquid from the coating roll to the flexible supiport is the appearance of a fog, mist or aerosol in the immediate vicinity of the coating head and particularly close to the points of contact between the coating roll and the flexible support being coated. Typically, the density of this fog, mist or aerosol increases with an increase in the forward speed of the flexible support being coated by the apparatus. The first effect of this transfer problem is to reduce the amount of silicone liquid actually transferred to the flexible support. A second effect is for the droplets comprising the fog, mist or aerosol to condense onto the newly coated flexible support downstream of the coating rolls creating an orange peel effect. This orange peel effect, or coating non-uniformity, creates problems with coverage, the mechanical properties of the coating, e.g. ruboff, and adhesion resistance. An additional problem caused by non-uniformity in the coating is related to industrial hygiene and the safety of people operating the coating equipment who are working in the vicinity of the coating equipment. SUMMARY OF THE INVENTION The present invention provides for a composition comprising the hydrosilylation reaction product of: a) Compound A b) and an amount a of CH2=CHR'CH=CH2 where R' is a divalent radical selected from the group consisting of halogens, hydrogen, CI to C60 divalent hydrocarbon radicals, CI to C60 divalent polyester radicals, CI to C60 divalent nitrile radicals, CI to C60 divalent alkyl halide radicals and CI to C60 divalent polyether radicals and a >b + d + f-g-h-i where Compound A is the hydrosilylation reaction product of: c) M,gMaMHb.gDcD'hDHd.hTeT,iTHf_i and d) (MjMvikD,DVimTnTVi0)pQ)q, where the subscripts a, b, c , d , e , f , g, h, i, j, k, 1, m, n, o, p, are zero or positive and q is non-zero and positive, with k + m + o0 with 1.5 < b + d + f < 100; 2 < a + b<12;0b + d + f-g-h-i where Compound A is the reaction product of: M'gMaMHb_gDcD,hDHd.hTeT'iTHf,i and (MjMvikD,DvimTnTvi0)pQ)q, in the presence of a noble metal hydrosilylation catalyst where the subscripts a, b, c , d , e , f , g, h, i, j, k, 1, m, n, o, p, are zero or positive and q is non-zero and positive, for mixtures of compounds the average values of each of the subscripts will most likely be non-integral, for specific compounds the subscripts will be integral, with k + m + o0 (these mathematical limitations on the subscripts and the stoichiometric coefficient beta are to insure that the hydride, MaMHbDcDHdTeTH f, is in stoichiometric excess as regards the molar quantity of silicon bonded hydrogen available for reaction, relative to the molar quantity of olefin, CH2=CHR' ) with 1.5 < b + d + f < 100; 2 b + d + f-g-h-i where Compound A is the hydrosilylation reaction product of: c) M'gMaMH b-gDcD'hDH d.h TeT'iTH f.s and d) (MjMvikD1DvimTnTvi0)pQ)q where the subscripts a, b, c , d , e , f, g, h, il j, k, 1, m, n, o, p, are zero or positive and q is non-zero and positive, with k + m + o<;b + d+f-'g-h-i,p ranges from 0.4 to 4.0, q ranges from 1 to 200 where the ratio between M'gMaMH b.gDcD'hDH d.h TeT'iTH,,, and (MjMv,kD,DvimTnTvi0)pQ)q as defined by (b+d+f-g-h-i)/(((k+m+o)p)q) ranges from 50.0 to 0.01; and where the compound: M'gMaM" b.gDcD'hDH d.h TeT'iTH r-, is the hydrosilylation reaction product of e)MaMHbDcDHdTeTHfand f) an amount p of CH2=CHR' where p + 1 < b + d + f and b + d + f - g - h -i > 0 with 1.5 < b + d + f< 100; 2 < a + b< 12; 0< c + d < 1000; 0< e + f< 10 and R' is a monovalent radical.selected from the the group consisting of halogens, hydrogen, CI to C60 monovalent hydrocarbon radicals. CI to C60 monovalent polyester radicals, C 1 to C60 monovalent nitrile radicals, CI to C60 monovalent alkyl halide radicals, CI to C60 monovalent polyether radicals and mixtures thereof; with M == R2R3R4 SiO,/2; MH-HR5R6SiO,/2; Mvi = RviR5R6SiO,/2; D = R7R8 Si01/2; DH = HR9 Si02/2; Dvl = RviRl0SiO2/2; T = R"Si03/2; TH==HSi03/2; Tvi = Rvi Si03/2; Q = Si04/2; M'=(C2H4R')R5R6Si01/2; D' = (C2H4R')R9Si02/2;and T' = (C2H4R') Si03/2 with each R2, R3, R4 R5, R6, R7, R8, R9, R10, and R1' independently selected from the group of CI to C60 monovalent hydrocarbon radicals and each RV| independently selected from the group of C2 to C60 monovalent alkenyl hydrocarbon radicals. 2. The composition as claimed in claim 1 wberein R1 is selected from the group consisting of CI to C60 monovalent hydrocarbon radicals, CI to C60 monovalent polyester radicals, CI to C60 monovalent nitrile radicals, CI to C60 monovalent alkyl halide radicals, CI to C60 monovalent polyether radicals and mixtures thereof. 3. The composition as claimed in claim 1 wherein R1 a is selected from the group consisting of CI 5 to C60 monovalent hydrocarbon radicals, CI 5 to C60 monovalent polyester radicals, CI5 to C60 monovalent nitrile radicals, CI5 to C60 monovalent alkyl halide radicals, CI to C60 monovalent polyether radicals and mixtures thereof, 4. The composition as claimed in claim 1 wherein R1 a is selected from the group consisting of C30 to C60 monovalent hydrocarbon radicals, C30 to C60 monovalent polyester radicals, C30 to C60 monovalent nitrile radicals, C30 to C60 monovalent alkyl halide radicals CI to C60 monovalent polyether radicals and mixtures thereof. 5. The composition as claimed in claim 12 where each R2, R3, R4, R5, R6, R7, R8, R9, R10,andRn are methyl. 6. The composition as claimed in claim 3 where each R2, R3, R4, R5, R6, R7, R8, R9, R,0,andR" are methyl. 7. The composition as claimed in claim 4 where each R2, R3, R4, R5, R6, R7, R8, R9, R10,and R" are methyl. 8. The composition as claimed in claim 1 wherein R1 is styryl. 9. The composition as claimed in claim 7 where R2, R3, R4, R5, R6, R7, R8, R9, Rl0,andR" are methyl. 10. The composition as claimed in claim 7 where each R2, R3, R4, R5, R6, R , R , R , Rl0,and R" are selected from the group comprising of C30 to C60 monovalent hydrocarbon radicals, C30 to C60 monovalent polyester radicals, C30 to C60 monovalent nitrile radicals, C30 to C60 monovalent alkyl halide radicals, CI to C60. monovalent polyether radicals and mixtures thereof.

Documents

Application Documents

# Name Date
1 4331-delnp-2008-pct-308.pdf 2011-08-21
1 4331-DELNP-2008_EXAMREPORT.pdf 2016-06-30
2 4331-delnp-2008-Assignment-(28-09-2012).pdf 2012-09-28
2 4331-delnp-2008-pct-304.pdf 2011-08-21
3 4331-delnp-2008-pct-210.pdf 2011-08-21
3 4331-delnp-2008-Correspondence-Others-(28-09-2012).pdf 2012-09-28
4 4331-delnp-2008-pct-101.pdf 2011-08-21
4 4331-delnp-2008-GPA-(28-09-2012).pdf 2012-09-28
5 4331-delnp-2008-form-5.pdf 2011-08-21
5 4331-delnp-2008-abstract.pdf 2011-08-21
6 4331-delnp-2008-form-3.pdf 2011-08-21
6 4331-delnp-2008-claims.pdf 2011-08-21
7 4331-delnp-2008-form-2.pdf 2011-08-21
7 4331-delnp-2008-correspondence-others.pdf 2011-08-21
8 4331-delnp-2008-description (complete).pdf 2011-08-21
8 4331-delnp-2008-form-18.pdf 2011-08-21
9 4331-delnp-2008-form-1.pdf 2011-08-21
10 4331-delnp-2008-form-18.pdf 2011-08-21
10 4331-delnp-2008-description (complete).pdf 2011-08-21
11 4331-delnp-2008-form-2.pdf 2011-08-21
11 4331-delnp-2008-correspondence-others.pdf 2011-08-21
12 4331-delnp-2008-form-3.pdf 2011-08-21
12 4331-delnp-2008-claims.pdf 2011-08-21
13 4331-delnp-2008-form-5.pdf 2011-08-21
13 4331-delnp-2008-abstract.pdf 2011-08-21
14 4331-delnp-2008-pct-101.pdf 2011-08-21
14 4331-delnp-2008-GPA-(28-09-2012).pdf 2012-09-28
15 4331-delnp-2008-pct-210.pdf 2011-08-21
15 4331-delnp-2008-Correspondence-Others-(28-09-2012).pdf 2012-09-28
16 4331-delnp-2008-pct-304.pdf 2011-08-21
16 4331-delnp-2008-Assignment-(28-09-2012).pdf 2012-09-28
17 4331-DELNP-2008_EXAMREPORT.pdf 2016-06-30
17 4331-delnp-2008-pct-308.pdf 2011-08-21