Color changeable aqueous adhesive systems
First Claim
1. A color changeable initially tacky aqueous adhesive comprising on an active ingredients basis:
- from 12 to 58 weight percent of a rubber latex;
from 1 to 20 weight percent of a tackifier;
from 0.01 to 0.06 weight percent of a pH adjustment agent; and
from 0.04 to 2 weight percent of a lampblack,wherein the lampblack functions both as a reinforcing agent and a visible color indicia means for evaluating the degree of dryness of the adhesive, which correlates to the degree of tack of the adhesive, said adhesive being initially a gray when applied and changing to a black when dry.
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Accused Products
Abstract
The invention describes both a method for bonding at least two elastomeric substrates together, wherein one of the substrates is a tire casing and another substrate is a tire tread, and an aqueous color changeable adhesive for effecting the bonding. The method includes the steps of buffing at least one surface of at least one of the substrates to an RMA 2 or RMA 3, applying the color changeable aqueous adhesive to the at least one surface, drying the adhesive for at least a period of time to permit an initial light grey color of the adhesive as applied to change to a flat black, and contacting the substrates under pressure to bond the substrates together. The color changeable aqueous adhesive includes at least a rubber latex emulsion, a tackifier, a pH adjustment agent, and a carbon black emulsion, wherein the carbon black functions both as a reinforcing agent and a visible color indicia means for evaluating the degree of dryness of the adhesive, which correlates to the degree of tack of the adhesive. The carbon black is a lampblack.
31 Citations
28 Claims
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1. A color changeable initially tacky aqueous adhesive comprising on an active ingredients basis:
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from 12 to 58 weight percent of a rubber latex; from 1 to 20 weight percent of a tackifier; from 0.01 to 0.06 weight percent of a pH adjustment agent; and from 0.04 to 2 weight percent of a lampblack, wherein the lampblack functions both as a reinforcing agent and a visible color indicia means for evaluating the degree of dryness of the adhesive, which correlates to the degree of tack of the adhesive, said adhesive being initially a gray when applied and changing to a black when dry. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A color changeable initially tacky aqueous adhesive comprising on an active ingredients basis:
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about 12 to 58 weight percent of a rubber latex; about 5 to 15 weight percent of a tackifier; about 0.02 to 0.2 weight percent of a pH adjustment agent; and about 0.04 to 2 weight percent of a lampblack, wherein the lampblack functions both as a reinforcing agent and a visible color indicia means for evaluating the degree of dryness of the adhesive, which correlates to the degree of tack of the adhesive, said adhesive being initially grey when applied and changing to a black when dry, said lampblack being added in an effective amount sufficient to change a luminosity value by at least 10% as the color changes from grey to black, and further wherein said adhesive has essentially equal values of red, blue and green, essentially a zero value for saturation. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A color changeable initially tacky aqueous adhesive comprising on an active ingredients basis:
from 12 to 58 weight percent of a rubber latex, said rubber latex being selected from the group consisting of natural rubber and synthetic rubbers and further wherein the synthetic rubbers are selected from the group consisting of polyisoprene, acrylonitrile-butadiene rubbers, styrene-butadiene rubbers, neoprene, butyl rubber, polybutadienes and ethylene-propylene-diene rubbery polymers; from 1 to 20 weight percent of a tackifier; from 0.01 to 0.06 weight percent of a pH adjustment agent; and from 0.04 to 2 weight percent of a lampblack, wherein the lampblack functions both as a reinforcing agent and a visible color indicia means for evaluating the degree of dryness of the adhesive, which correlates to the degree of tack of the adhesive, said adhesive being initially a gray when applied and changing to a black when dry. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28)
Specification