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1. (WO1994006834) POLYMERIC MICROSPHERES FOR LOW-FRICTION SURFACES
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What is claimed:

1. A bead having a mean bead diameter of from about 0.1 to about 50 microns, said bead comprising:
(a) about 20 to about 100 percent by weight of polymerized diol di(meth)acrylate having a viscosity of about 1 mPa • s to about 400 mPa • s of the formula

CH2 = CR2COOCnH2nOOCCR2 = CH2

wherein
R2 is H or CH3; and
n is an integer of about 4 to about 18;
(b) about 0 to about 80 percent by weight of at least one copolymerized vinyl monomer of the formula

CH2=CR COOCmH2m+ 1

wherein
R2 is H or CH3; and
m is an integer of about 12 to about 40;
(c) about 0 to about 30 percent by weight of at least one copolymerized ethylenically unsaturated monomer selected from the group consisting of vinyl esters, acrylic esters, methacrylic esters, styrene, styrene derivatives, and mixtures thereof; and
(d) about 0 to about 10 percent by weight of at least one organosilane coupling agent selected from the group consisting of
glycidoxyalkyl trimethoxysilanes and (aminoalkylamino) alkyl
trimethoxysilanes; wherein the weight percentages are based on the total weight of (a) plus (b) plus (c) plus (d).

2. The bead of claim 1 wherein said diol di(meth)acrylate is selected from the group consisting of 1 ,4-butanediol di(meth)acrylate, 1 ,6-hexanediol di(meth)acrylate, 1,8-octanediol di(meth)acrylate, 1,10-decanediol
di(meth)acrylate, 1,12-dodecanediol di(meth)acrylate, 1,14-tetradecanediol di(meth)acrylate, and mixtures thereof.

3. The bead of claim 1 wherein said diol di(meth)acrylate is selected from the group consisting of 1 ,4-butanediol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, 1, 12-dodecanediol di(meth)acrylate, 1, 14-tetradecanediol di(meth)acrylate, and mixtures thereof.

4. The bead of claim 1 wherein said vinyl monomer is selected from the group consisting of lauryl (meth)acrylate, octadecyl (meth)acrylate, stearyl (meth)acrylate, and mixtures thereof.

5. The bead of claim 1 wherein said vinyl monomer is selected from the group consisting of stearyl methacrylate and lauryl acrylate.

6. The bead of claim 1 wherein said ethylencially unsaturated monomer is selected from the group consisting of vinyl acetate, vinyl propionate, and vinyl pivalate; methyl acrylate, cyclohexylacrylate,
benzylacrylate, isobornyl acrylate, hydroxybutyl acrylate, and glycidyl acrylate; methyl methacrylate, butyl methacrylate, cyclohexyl methacrylate, benzyl methacrylate, ethyl methacrylate, gamma-methacryloxypropyl trimethoxylsilane, and glycidyl methacrylate; styrene; vinyl toluene; alpha-methyl styrene, and mixtures thereof.

7. A bead having a mean bead diameter of from about 0.1 to about 50 microns, said bead comprising:
(a) about 20 to about 99 percent by weight of polymerized diol di(meth)acrylate having a viscosity of about 1 mPa • s to about 400 mPa • s of the formula

CH2 = CR2COOCnH2nOOCCR2 = CH2

wherein
R2 is H or CH3; and
n is an integer of about 4 to about 18;
(b) about 1 to about 79 percent by weight of at least one copolymerized vinyl monomer of the formula

CH2=CR2COOCmH2m+ 1 wherein
R2 is H or CH3; and
m is an integer of about 12 to about 40;
(c) about 0 to about 30 percent by weight of at least one copolymerized ethylenically unsaturated monomer selected from the group consisting of vinyl esters, acrylic esters, methacrylic esters, styrene, styrene derivatives, and mixtures thereof; and
(d) about 0 to about 10 percent by weight of at least one organosilane coupling agent selected from the group consisting of
glycidoxyalkyl trimethoxysilanes and (aminoalkylamino) alkyl
trimethoxysilanes; wherein the weight percentages are based on the total weight of (a) plus (b) plus (c) plus (d).

8. A bead having a mean bead diameter of from about 0.1 to about 50 microns, said bead comprising:
(a) about 20 to about 98 percent by weight of polymerized diol di(meth)acrylate having a viscosity of about 1 mPa • s to about 400 mPa • s of the formula

CH2=CR2COOCnH2nOOCCR2=CH2

wherein
R2 is H or CH3; and
n is an integer of about 4 to about 18;
(b) about 1 to about 79 percent by weight of at least one copolymerized vinyl monomer of the formula

CH2=CR COOCmH2m+ 1

wherein
R2 is H or CH3; and
m is an integer of about 12 to about 40;
(c) about 1 to about 29 percent by weight of at least one copolymerized ethylenically unsaturated monomer selected from the group consisting of vinyl esters, acrylic esters, methacrylic esters, styrene, styrene derivatives, and mixtures thereof; and (d) about 0 to about 10 percent by weight of at least one organosilane coupling agent selected from the group consisting of
glycidoxyalkyl trimethoxysilanes and (aminoalkylamino) alkyl
trimethoxysilanes; wherein the weight percentages are based on the total weight of (a) plus (b) plus (c) plus (d).

9. A coated substrate comprising a polymeric sheet coated with the beads of claim 1.

10. A coated substrate comprising a polymeric sheet coated with a mixture comprising the beads of claim 1 and a resin selected from the group consisting of acrylates, polyurethanes, polyesters, polyamides, vinyl esters, and mixtures thereof.