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US 5,674,966 AGranted
Low molecular weight liquid injection molding resins having a high vinyl content
AssigneeGeneral Electric Company
InventorsPhilip J. McDermott, Donald S. Johnson, Brian J. Ward, Edward Matthew Jeram
Life of this patent
Estimating the term…
Abstract
Low molecular weight, high alkenyl content silicone resins of the general formula 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 or M.sub.y M.sup.vi.sub.z D.sub.a D.sup.vi.sub.b T.sub.c T.sup.vi.sub.d 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.
Claims53
A silicone resin selected from the group consisting of silicone resins having the formula:
- 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=SiO.sub.4/2 ;
- M=(R.sup.2).sub.3 SiO.sub.1/2 ;
- M.sup.vi =R.sup.1 (R.sup.2).sub.2 SiO.sub.1/2 ;
- D=R.sup.2.sub.2 SiO.sub.2/2 ;
- D.sup.vi =R.sup.1 R.sup.2 SiO.sub.2/2 ;
- T=R.sup.2 SiO.sub.3/2 ;
- and
- T.sup.vi =R.sup.1 SiO.sub.3/2 ;
- where each R.sup.1 is independently selected and is a two to twelve carbon atom alkenyl group and where each R.sup.2 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:
- 2.ltoreq.(y+z).ltoreq.4
- subject to the limitation that z and y satisfy one of the two relationships:
- (z/y)>1 or z>y.
11 more elements
A silicone resin selected from the group consisting of silicone resins having the formula:
- 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=SiO.sub.4/2 ;
- M=(R.sup.2).sub.3 SiO.sub.1/2 ;
- M.sup.vi =R.sup.1 (R.sup.2).sub.2 SiO.sub.1/2 ;
- D=R.sup.2.sub.2 SiO.sub.2/2 ;
- D.sup.vi =R.sup.1 R.sup.2 SiO.sub.2/2 ;
- T=R.sup.2 SiO.sub.3/2 ;
- and
- T.sup.vi =R.sup.1 SiO.sub.3/2 ;
- where each R.sup.1 is independently selected and is a two to twelve carbon atom alkenyl group and where each R.sup.2 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:
- .ltoreq. (y+z).ltoreq.4
- subject to the limitation that z and y satisfy one of the two relationships:
- (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.degree. C.
12 more elements
A silicone resin selected from the group of silicone resins having the formula:
- 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=SiO.sub.4/2 ;
- M=(R.sup.2).sub.3 SiO.sub.1/2 ;
- M.sup.vi =R.sup.1 (R.sup.2).sub.2 SiO.sub.1/2 ;
- D=R.sup.2.sub.2 SiO.sub.2/2 ;
- D.sup.vi =R.sup.1 R.sup.2 SiO.sub.2/2 ;
- T=R.sup.2 SiO.sub.3/2 ;
- and
- T.sup.vi =R.sup.1 SiO.sub.3/2 ;
- where each R.sup.1 is independently selected and is a two to twelve carbon atom alkenyl group and where each R.sup.2 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:
- .ltoreq. (y+z).ltoreq.4
- subject to the limitation that z and y satisfy one of the two relationships:
- (z/y)>1 or z>y.
11 more elements
A silicone resin selected from the group consisting of silicone resins having the formula:
- 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=SiO.sub.4/2 ;
- M=(R.sup.2).sub.3 SiO.sub.1/2 ;
- M.sup.vi =R.sup.1 (R.sup.2).sub.2 SiO.sub.1/2 ;
- D=R.sup.2.sub.2 SiO.sub.2/2 ;
- D.sup.vi =R.sup.1 R.sup.2 SiO.sub.2/2 ;
- T=R.sup.2 SiO.sub.3/2 ;
- and
- T.sup.vi =R.sup.1 SiO.sub.3/2 ;
- where each R.sup.1 is independently selected and is a two to twelve carbon atom alkenyl group and where each R.sup.2 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:
- 1.ltoreq.(y+z).ltoreq.4
- subject to the limitation that z and y satisfy one of the two relationships:
- (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.degree. C.
12 more elements
Dependencies are inferred from the claim text.