Low molecular weight liquid injection molding resins having a high vinyl content
First Claim
Patent Images
1. A silicone resin selected from the group consisting of silicone resins having the formula:
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space="preserve" listing-type="equation">M.sub.y M.sup.vi.sub.z D.sub.a D.sup.vi.sub.b T.sub.c T.sup.vi.sub.d Q and M.sub.y M.sup.vi.sub.z D.sub.a D.sup.vi.sub.b T.sub.c T.sup.vi.sub.d ;
whereQ=SiO4/2 ;
M=(R2)3 SiO1/2 ;
Mvi =R1 (R2)2 SiO1/2 ;
D=R22 SiO2/2 ;
Dvi =R1 R2 SiO2/2 ;
T=R2 SiO3/2 ; and
Tvi =R1 SiO3/2 ;
where each R1 is independently selected and is a two to twelve carbon atom alkenyl group and where each R2 is independently selected and is a one to eight carbon atom alkyl, aryl, or alkylaryl group and where the subscripts a, b, c, d, and y may be zero or a positive number when Q is present and when Q is absent one of the subscripts c or d must be positive and non-zero and where the subscripts y and z satisfy the following relationship;
space="preserve" listing-type="equation">2≦
(y+z)≦
4subject to the limitation that z and y satisfy one of the two relationships;
space="preserve" listing-type="equation">(z/y)>
1 or z>
y.
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Abstract
Low molecular weight, high alkenyl content silicone resins of the general formula My Mviz Da Dvib Tc Tvid Q or My Mviz Da Dvib Tc Tvid are disclosed, their use in curable liquid injection molding compositions, a process for varying the cure properties of such compositions and articles of manufacture made thereby and therewith.
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Citations
53 Claims
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1. A silicone resin selected from the group consisting of silicone resins having the formula:
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space="preserve" listing-type="equation">M.sub.y M.sup.vi.sub.z D.sub.a D.sup.vi.sub.b T.sub.c T.sup.vi.sub.d Q and M.sub.y M.sup.vi.sub.z D.sub.a D.sup.vi.sub.b T.sub.c T.sup.vi.sub.d ;where Q=SiO4/2 ; M=(R2)3 SiO1/2 ; Mvi =R1 (R2)2 SiO1/2 ; D=R22 SiO2/2 ; Dvi =R1 R2 SiO2/2 ; T=R2 SiO3/2 ; and Tvi =R1 SiO3/2 ; where each R1 is independently selected and is a two to twelve carbon atom alkenyl group and where each R2 is independently selected and is a one to eight carbon atom alkyl, aryl, or alkylaryl group and where the subscripts a, b, c, d, and y may be zero or a positive number when Q is present and when Q is absent one of the subscripts c or d must be positive and non-zero and where the subscripts y and z satisfy the following relationship;
space="preserve" listing-type="equation">2≦
(y+z)≦
4subject to the limitation that z and y satisfy one of the two relationships;
space="preserve" listing-type="equation">(z/y)>
1 or z>
y. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A silicone resin selected from the group consisting of silicone resins having the formula:
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space="preserve" listing-type="equation">M.sub.y M.sup.vi.sub.z D.sub.a D.sup.vi.sub.b T.sub.c T.sup.vi.sub.d Q and M.sub.y M.sup.vi.sub.z D.sub.a D.sup.vi.sub.b T.sub.c T.sup.vi.sub.d ;where Q=SiO4/2 ; M=(R2)3 SiO1/2 ; Mvi =R1 (R2)2 SiO1/2 ; D=R22 SiO2/2 ; Dvi =R1 R2 SiO2/2 ; T=R2 SiO3/2 ; and Tvi =R1 SiO3/2 ; where each R1 is independently selected and is a two to twelve carbon atom alkenyl group and where each R2 is independently selected and is a one to eight carbon atom alkyl, aryl, or alkylaryl group and where the subscripts a, b, c, d, and y may be zero or a positive number when Q is present and when Q is absent one of the subscripts c or d must be positive and non-zero and where the subscripts y and z satisfy the following relationship;
space="preserve" listing-type="equation">≦
(y+z)≦
4subject to the limitation that z and y satisfy one of the two relationships;
space="preserve" listing-type="equation">(z/y)>
1 or z>
y;whereby said resin has a molecular weight below about 2,000 g/mole, an alkenyl content of up to about 30 weight percent, and a viscosity of up to about 15,000 centipoise at 25°
C. - View Dependent Claims (26)
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27. A silicone resin selected from the group of silicone resins having the formula:
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space="preserve" listing-type="equation">M.sub.y M.sup.vi.sub.z D.sub.a D.sup.vi.sub.b T.sub.c T.sup.vi.sub.d Q and M.sub.y M.sup.vi.sub.z D.sub.a D.sup.vi.sub.b T.sub.c T.sup.vi.sub.d ;where Q=SiO4/2 ; M=(R2)3 SiO1/2 ; Mvi =R1 (R2)2 SiO1/2 ; D=R22 SiO2/2 ; Dvi =R1 R2 SiO2/2 ; T=R2 SiO3/2 ; and Tvi =R1 SiO3/2 ; where each R1 is independently selected and is a two to twelve carbon atom alkenyl group and where each R2 is independently selected and is a one to eight carbon atom alkyl, aryl, or alkylaryl group and where the subscripts a, b, c, d and y may be zero or a positive number, one of the subscripts c or d must be positive and non-zero, and the subscripts y and z satisfy the following relationship;
space="preserve" listing-type="equation">≦
(y+z)≦
4subject to the limitation that z and y satisfy one of the two relationships;
space="preserve" listing-type="equation">(z/y)>
1 or z>
y. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51)
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52. A silicone resin selected from the group consisting of silicone resins having the formula:
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space="preserve" listing-type="equation">M.sub.y M.sup.vi.sub.z D.sub.a D.sup.vi.sub.b T.sub.c T.sup.vi.sub.d Q and M.sub.y M.sup.vi.sub.z D.sub.a D.sup.vi.sub.b T.sub.c T.sup.vi.sub.d ;where Q=SiO4/2 ; M=(R2)3 SiO1/2 ; Mvi =R1 (R2)2 SiO1/2 ; D=R22 SiO2/2 ; Dvi =R1 R2 SiO2/2 ; T=R2 SiO3/2 ; and Tvi =R1 SiO3/2 ; where each R1 is independently selected and is a two to twelve carbon atom alkenyl group and where each R2 is independently selected and is a one to eight carbon atom alkyl, aryl, or alkylaryl group and where the subscripts a, b, c, d and y may be zero or a positive number, one of the subscripts c or d must be positive and non-zero, and the subscripts y and z satisfy the following relationship;
space="preserve" listing-type="equation">1≦
(y+z)≦
4subject to the limitation that z and y satisfy one of the two relationships;
space="preserve" listing-type="equation">(z/y)>
1 or z>
y;whereby said resin has a molecular weight below about 2,000 g/mole, an alkenyl content of up to about 30 weight percent, and a viscosity of up to about 15,000 centipoise at 25°
C. - View Dependent Claims (53)
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Specification