Claims
- 1. A composition of matter for use in the preparation of polymeric materials having enhanced physical properties comprising (A) a nonsolvent for vinylidene chloride polymers and (B) a vinylidene chloride polymer powder, having a second order transition temperature of at least about 50.degree. C., which is dispersed in the nonsolvent, said powder being obtained by a method comprising the steps of
- (I) preparing a vinylidene chloride polymer latex by emulsion polymerizing about 50 to about 65 weight percent vinylidene chloride and at least one copolymerizable ethylenically unsaturated comonomer and
- (II) recovering the vinylidene chloride polymer powder from the latex;
- wherein the latex polymer particles prior to recovery have a diameter less than about 1 micron, with the further limitation that when 20 weight percent of the powder is mixed with a polyol having a room temperature viscosity of about 900 to 1000 centipoise and the powder polyol mixture is passed once through a Gifford-Wood colloid mill operating at 10,000 rpm with a gap setting of 0.004 inch and then twice through a Gaulin homogenizer operating at 5000 pounds per square inch, the powder will break down in polyol and regenerate original latex particles; powder particles which do not break down to latex particle size are of a size less than about 100 microns.
- 2. A polyurethane material prepared from a composition of matter for use in the preparation of urethane polymer foam having enhanced physical properties comprising (A) a nonsolvent for vinylidene chloride polymers said non-solvent being a liquid organic reactant used in the preparation of said foam, and (B) a vinylidene chloride polymer powder, having a second order transition temperature of at least about 50.degree. C., which is dispersible in the nonsolvent, said powder being obtained by a method comprising the steps of
- (I) preparing a vinylidene chloride polymer latex by emulsion polymerizing about 50 to about 65 weight percent vinylidene chloride and at least one copolymerizable ethylenically unsaturated comonomer and
- (II) recovering the vinylidene chloride polymer powder from the latex;
- (III) redispersing said powder in said nonsolvent;
- wherein the latex polymer particles prior to recovery have a diameter less than about 1 micron, with the further limitation that when 20 weight percent of the powder is mixed with a polyol having a room temperature viscosity of about 900 to 1000 centipoise and the powder polyol mixture is passed once through a Gifford-Wood colloid mill operating at 10,000 rpm with a gap setting of 0.004 inch and then twice through a Gaulin homogenizer operating at 5000 pounds per square inch, the powder will break down in polyol and regenerate original latex particles; powder particles which do not break down to latex particle size are of a size less than about 100 microns.
Parent Case Info
This is a continuation of application Ser. No. 150,771, filed May 19, 1980, now abandoned, which is a division of Ser. No. 942,510, filed Sept. 15, 1978, now abandoned.
US Referenced Citations (7)
Foreign Referenced Citations (3)
Number |
Date |
Country |
0010161 |
Apr 1980 |
EPX |
50-15833 |
Jul 1975 |
JPX |
1416061 |
Mar 1975 |
GBX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
942510 |
Sep 1978 |
|
Continuations (1)
|
Number |
Date |
Country |
Parent |
150771 |
May 1980 |
|