Emulsion composition and method for use in treating glass fibers
AssigneePPG Industries, Inc.
InventorChester S. Temple
Life of this patent
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Abstract
A binder composition and method for using same in sizing compositions for treating glass fibers is provided. The binder composition is an aqueous emulsion containing isotactic carboxylated polypropylene along with amorphous carboxylated polypropylene, base, and surfactant. The isotactic carboxylated polypropylene is incorporated in the emulsion by a method of co-emulsification of the isotactic and amorphous carboxylated polypropylene in a ratio of 1:1 to 1:4 parts by weight along with the base and surfactant. Water is added to the co-emulsified blend to obtain the emulsion with the desired solids content.
Claims29
An aqueous emulsion composition for use in a size composition for application to glass fibers, comprising:
- isotatic carboxylated polypropylene,
- amorphous carboxylated polyproplene, where both the isotactic and amorphous carboxylated polypropylene are prepared by modifying isotactic and amorphous polypropylene with ethylenically substituted polycarboxylic acid or anhydride, amide, or lower alkyl ester thereof,
- a base,
- a surfactant selected from the group consisting of cationic, anionic and nonionic, and
- water in amounts sufficient to make a composition having about 20 to about 40 percent solids by weight.
method of preparing an aqueous emulsion composition for facile emulsification if isotactic carboxylated polypropylene or a mixture of isotactic carboxylated polypropylene and isotactic carboxylated polyethylene, comprising:
- (1) melting the isotactic carboxylated polypropylene with the amorphous carboxylated polypropylene, both of which are prepared by modifying isotactic and amorphous polypropylene with ethylenically substituted polycarboxylic acid or anhydride, amide, or lower alkyl ester thereof;
- (2) adding to the melted mixture a base selected from the group consisting of alkali metal hydroxides, borax and 2-aminomethylpropanol and surfactants selected from cationic, anionic, and nonionic,
- (3) adding sufficient amount of water to make an emulsion having about 20 to about 40 percent solids by weight.
An aqueous emulsion composition having emulsified isotactic carboxylated polypropylene, comprising:
- (a) a blend of isotactic carboxylated polypropylene and amorphous carboxylated polypropylene in amounts in a ratio in the range of about 1 part by weight of isotactic carboxylated polypropylene to about 1 part by weight of the amorphous carboxylated polypropylene to a ratio of 1 part of the isotactic carboxylated polypropylene to about 4 parts of the amorphous carboxylated polypropylene, where both the isotactic and amorphous carboxylated polypropylene are prepared by modifying isotactic and amorphous polypropeylene with ethylenically substituted polycarboxylic acid or anhydride, amide, or lower alkylester thereof,
- (b) a base in an amount of the range to produce an equivalent alkalinity to that of an amount of potassium hydroxide sufficient to provide a residual content of hydroxides ranging from about 16 to about 24 milligrams of hydroxide per gram of emulsion,
- (c) a surfactant selected from the group consisting of cationic, anionic, and nonionic in an amount in the range of about 2 to about 12 weight percent of the solids of the composition, and
- (d) water in amounts sufficient to make an emulsion composition having about 20 to about 40 percent solids wherein the pH is in the range of about 8 to 9.5.
Glass fibers sized with the dried residue of an aqueous sizing composition having a percent by weight of the aqueous sizing composition, comprising:
- a. about 2 to about 15 percent of an aqueous emulsion having:
- 1. isotactic carboxylated polypropylene,
- 2. amorphous carboxylated polyproylene,
- 3. a base,
- 4. a surfactant selected from the group consisting of cationic, anionic and nonionic,
- 5. water in amount sufficient to make an aqueous emulsion having about 20 to about 40 percent solids;
- b. about 0.1 to about 2 percent of a silane coupling agent;
- c. about 0.4 to about 12 percent of a film former;
- d. about 0.2 to about 4 percent of a lubricant;
- e. the remaining amount being water to give a total solids content in the range of about 2 to about 20 weight percent.
Dependencies are inferred from the claim text.