1. An improved cable assembly, comprising:
a cable, the cable including a plurality of signal-transmitting wires, pairs of the signal-transmitting wires being arranged in the cable, each signal-transmitting wire including a conductor surrounded by an insulative covering, each conductor extending forwardly past a leading edge of the insulative covering to define a free end of each signal-transmitting wire;
a circuit board having opposite leading and trailing edges, the circuit board including a first portion to which the free ends are terminated and a second portion extending forwardly from and spaced apart from the first portion, the first portion including a plurality of contact pads disposed on a surface thereof, the contact pads being arranged in pairs of contact pads associated with each free end, the contact pads of each contact pad pair being aligned with each other so that a leading edge of the forwardmost contact pad and a trailing edge of the rearmost contact pad define a predetermined length, L, therebetween, the contact pads being separated from each other by an intervening spacing, the cumulative length of the contact pads being between about 0.5 L to 0.8 L; and
a housing enclosing at least a portion of the circuit board.
2. The cable assembly of claim 1, wherein each contact pad pair includes a thin, conductive trace interconnecting the pads of each contact pad pair together.
3. The cable assembly of claim 1, wherein one of the free ends is terminated to one of the pairs of contact pads.
4. The cable assembly of claim 3, wherein at least one pad of the pairs of contact pads encompasses a via extending into the circuit board.
5. The cable assembly of claim 4, wherein each pad of each pair of contact pads encompasses a via extending into the circuit board.
6. The cable assembly of claim 1, wherein the pairs of contact pads are spaced widthwise apart from each other by a first predetermined spacing, and the circuit board further includes conductive transmission traces extending from the forwardmost contact pads in a direction toward the first portion, the transmission traces being separated by a second spacing which is less than the first spacing.
7. The cable assembly of claim 6, wherein the transmission traces converge toward each other until separated by the second spacing.
8. The cable assembly of claim 1, wherein the contact pads have a length of about 0.8 mm, and the intervening spacing between the contact pads has a length of about 1.0 mm.
9. The cable assembly of claim 1, wherein the intervening spacing is between about 0.2 L to about 0.4 L.
10. The cable assembly of claim 1, wherein each interconnecting trace is generally centered between the pair of contact pads it connects together.
11. The cable assembly of claim 1, wherein each interconnecting trace has a width of about 25% to about 40% of a width of the contact pads.
12. A circuit board for use in a high speed cable connector, the circuit board having improved impedance characteristics, comprising:
a circuit board having opposite leading and trailing edges, the circuit board including a first portion proximate to the trailing end defining a termination area in wires of an associated cable are terminated, and a second portion extending forwardly from and spaced apart from the first portion and ending proximate to the second portion, the second portion including a plurality of contacts disposed thereon and configured to mate with an opposing connector, the first portion including a plurality of termination contact pads disposed on a surface thereof, the termination contact pads being arranged in pairs of contact pads, the contact pads of each pair of termination contact pads being arranged on the circuit board so that a leading edge of the forwardmost pad of the contact pad pair and a trailing edge of the rearmost pad of the contact pad pair are separated by a predetermined termination length, L, for a single one of the cable wires, and the contact pads being separated from each other by an intervening spacing, and the cumulative length of the contact pads is between about 0.5 L to 0.8 L.
13. The circuit board of claim 12, wherein each contact pad has a square configuration.
14. The circuit board of claim 12, wherein each contact pad pairs include a thin, conductive trace interconnecting the pads of each contact pad pair together such that the contact pad pairs have a dogbone-like configuration when viewed from the top.
15. The circuit board of claim 14, wherein the interconnecting conductive trace is generally centered between the contact pads it interconnects and at least one of the contact pads includes a via extending into the circuit board.
16. The circuit board of claim 14, wherein the interconnecting conductive trace has a width between about 25% and about 40% of the width of one of the contact pads.
17. The circuit board of claim 12, wherein the pairs of contact pads are spaced apart widthwise by a first spacing and conductive traces extending forwardly from the forwardmost contact pads are separated by a second widthwise spacing, less than the first spacing.
18. The circuit board of claim 12, wherein each contact pad has a length of about 0.8 mm and the intervening spacing has a length of about 1.0 mm.
19. The circuit board of claim 12, wherein the intervening spacing between the contact pads has a length of between about 0.2 L to about 0.4 L.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A composition comprising
at least one insecticide,
a nonionic andor ionic dispersant, and
a grafted aqueous polymer dispersion,
wherein the insecticide is transfluthrin,
wherein the polymer dispersion is prepared by radical-initiated emulsion copolymerization in the presence of a hydrocolloid comprising starch as a grafting base, of a monomer mixture comprising
a) 30 to 60% by weight, based on the monomer mixture weight, of at least one styrene or substituted styrene,
(b) 60 to 30% by weight, based on the monomer mixture weight, of at least one C1-C4-alkyl(meth)acrylate, and
(c) 0 to 10% by weight, based on the monomer mixture weight, of other ethylenically unsaturated copolymerizable monomers,
and wherein the starch (d) employed is 10 to 40% by weight of degraded starch with a molar weight Mn=500 to 10 000, the total of (a)+(b)+(c)+(d) being 100%, and the radical-initiator employed for the radical-initiated emulsion polymerization is a graft-active, water-soluble redox system,
and wherein the polymer dispersion after drying has a glass transition temperature of 40\xb0 C. to 80\xb0 C.
2. The composition according to claim 1, wherein the polymer dispersion at a concentration of 0.025% by weight in demineralized water at a wavelength of 535 nm and a path length of 1 cm has an absorbance of not more than 2.0.
3. A method for controlling pests comprising employing the composition according to claim 1 for controlling pests.
4. The method according to claim 3 comprising treating a surface with a deposition rate of 1.0 mgm2 to 2000 mgm2 polymer based on solids content.
5. An aqueous grafted polymer dispersion suitable for use in a pesticide which,
in demineralized water at a concentration of 0.025% by weight based on the solids content, has an absorbance, measured in a 1 cm cell at 535 nm, of <2.0 and
after drying has a glass transition temperature of 40\xb0 C. to 80\xb0 C.,
wherein the pesticide is transfluthrin,
wherein the polymer dispersion is prepared by radical-initiated emulsion copolymerization in the presence of a hydrocolloid comprising starch as a grafting base, of a monomer mixture comprising
a) 30 to 60% by weight, based on the monomer mixture weight, of at least one styrene or substituted styrene,
(b) 60 to 30% by weight, based on the monomer mixture weight, of at least one C1-C4-alkyl(meth)acrylate, and
(c) 0 to 10% by weight, based on the monomer mixture weight, of other ethylenically unsaturated copolymerizable monomers,
and wherein the starch (d) employed is 10 to 40% by weight of degraded starch with a molar weight Mn=500 to 10 000, the total of (a)+(b)+(c)+(d) being 100%, and the radical-initiator employed for the radical-initiated emulsion polymerization is a graft-active, water-soluble redox system.
6. A medicament comprising a composition according to claim 1 suitable for controlling ectoparasites in animals.
7. A method of extending the efficacy of a pesticide comprising adding a grafted polymer dispersion to a composition comprising said pesticide prior to application, which polymer dispersion, at a concentration of 0.025% by weight in demineralized water at a wavelength of 535 nm and a path length of 1 cm, has an absorbance of less than 2.0,
wherein the insecticide is transfluthrin,
wherein the polymer dispersion is prepared by radical-initiated emulsion copolymerization in the presence of a hydrocolloid comprising starch as a grafting base, of a monomer mixture comprising
a) 30 to 60% by weight, based on the monomer mixture weight, of at least one styrene or substituted styrene,
(b) 60 to 30% by weight, based on the monomer mixture weight, of at least one C1-C4-alkyl(meth)acrylate, and
(c) 0 to 10% by weight, based on the monomer mixture weight, of other ethylenically unsaturated copolymerizable monomers,
and wherein the starch (d) employed is 10 to 40% by weight of degraded starch with a molar weight Mn=500 to 10 000, the total of (a)+(b)+(c)+(d) being 100%, and the radical-initiator employed for the radical-initiated emulsion polymerization is a graft-active, water-soluble redox system.
8. The composition of claim 1, wherein said insecticide is partially embedded on a surface by a layer of said polymer dispersion formed between said insecticide and said surface.
9. The composition of claim 1, wherein said composition demonstrates longer-lasting insecticidal activity on both porous and non-porous surfaces than an identical composition without said polymer dispersion.
10. The composition of claim 1, wherein said composition demonstrates longer-lasting insecticidal activity on an animal than an identical composition without said polymer dispersion.
11. The method according to claim 3, comprising treating a surface with a deposition rate of 5 mgm2 to 200 mgm2 polymer based on solids content.
12. The composition of claim 1, wherein the C1-C4-alkyl(meth)acrylate comprises n-butyl acrylate and t-butyl acrylate.
13. The composition according to claim 1, which is a concentrated formulations, wherein the amount of insecticide is between 0.01 to 40% by weight, and the amount polymer dispersion is between 1 and 50% by weight.
14. The composition according to claim 1, wherein the composition is a ready-to-use composition, and the amount of insecticide is between 0.001 and 0.5% by weight, and the amount of polymer dispersion is between 0.002 and 1% by weight.