Unlock instant, AI-driven research and patent intelligence for your innovation.

Tackifier composition

A tackifier and polymer technology, applied in the direction of adhesives, adhesive types, ester copolymer adhesives, etc., can solve the problem of low adhesion and achieve the effect of improving adhesion and good compatibility

Pending Publication Date: 2021-11-05
DOW GLOBAL TECH LLC +1
View PDF13 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some known adhesive compositions, the adhesion of the adhesive is reduced to an undesirably low level such that the adhesion is lower than that of an adhesive without the tackifier material

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Tackifier composition
  • Tackifier composition
  • Tackifier composition

Examples

Experimental program
Comparison scheme
Effect test

example

[0078] The following examples are presented for further elaboration of the invention and should not be considered as limiting the scope of the claims. All parts and percentages are by weight unless otherwise indicated.

[0079] The various raw materials or ingredients used in the Inventive Examples (Inv. Ex.) and Comparative Examples (Comp. Ex.) are explained as follows:

[0080] Triton XN-45S is a surfactant commercially available from The Dow Chemical Company.

[0081] Various terms and designations used in the examples are explained below:

[0082] "Sty" stands for styrene.

[0083] "MAA" stands for methacrylic acid.

[0084] "nDDM" stands for n-dodecylmercaptan.

[0085] "BMA" stands for n-butyl methacrylate.

[0086] "MMA" stands for methyl methacrylate.

example 1-4 and comparative example A

[0087] Examples 1-4 and Comparative Examples A-C - Tackifier Polymeric Additives

[0088] General procedure for preparing emulsions

[0089] Using a flask equipped with a mechanical stirrer, 0.6 g of sodium carbonate, 720 grams (g) of deionized water, 7.2 g of a 22% strength solution of sodium dodecylbenzenesulfonate in water, and 13.2 g of β-methyl cyclopaste The refined charge was heated to 87°C. Preparation Made from 11.2g Triton XN-45S, 13.4g 22% strength solution of sodium dodecylbenzenesulfonate in water, 3.3g methacrylic acid, 250g water, 491.8g styrene and 107.9g butyl methacrylate lotion. A portion (43.9 g) of the emulsion was transferred to a flask. Next, 20.1 g of a 33% aqueous solution of sodium persulfate was poured into the flask. After initiation of polymerization and initial exotherm, 67 g of dodecyl mercaptan was added to the emulsion. The emulsion was gradually dispensed into the flask over a span of 3.0 hours. At the beginning, the emulsion was add...

example 5-8 and comparative example D

[0117] Examples 5-8 and Comparative Examples D-F - Pressure Sensitive Adhesives

[0118] The polymeric tackifier additives described in Table III were blended with butyl acrylate based pressure sensitive adhesive polymer (BA-PSA) at solids loadings from 25 parts additive to 100 parts adhesive solids to prepare Pressure sensitive adhesive polymer.

[0119] Table IV - Pressure Sensitive Adhesive Polymers and Films

[0120] example

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Glass transition temperatureaaaaaaaaaa
Number average molecular weightaaaaaaaaaa
Login to View More

Abstract

A tackifier polymeric additive including an emulsion polymerization reaction product of: (a) at least one aromatic monomer; (b) at least one acrylate or methacrylate monomer; and (c) at least one chain transfer agent; and a tackified acrylic adhesive composition including (I) at least one acrylic adhesive polymer; and (II) the above tackifier polymeric additive.

Description

technical field [0001] The present invention relates to a tackifier polymeric additive; and more particularly, the present invention relates to a tackifier polymeric additive for adhesives Background technique [0002] Pressure sensitive adhesives are characterized by both the adhesion of the adhesive to the substrate (peel, tack) and the internal cohesive strength of the adhesive (shear resistance). However, adhesion and cohesive strength are two properties that are generally inversely related. For some applications, both adhesion and cohesion need to be improved; and these two properties are difficult to obtain through conventional polymer design or additive methods. [0003] One common method of increasing the adhesion of pressure sensitive adhesives is to add polymeric additives called tackifiers to the adhesive. Tackifiers are used to increase the self-adhesion (stickiness) of the adhesive. Several classes of polymers are known to be used as tackifiers, such as rosin...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08F212/08C08F220/18C08L33/08C08F2/38C09J133/08
CPCC08F212/08C08F220/1804C08L33/08C08F2/38C09J133/08C08F220/06C08F220/14C08L25/06C08L33/10C09J7/385C09J2301/408C09J2301/414C08F2800/20C09J11/08C09J2425/00C09J2433/00
Inventor J·B·宾德S·普加里
Owner DOW GLOBAL TECH LLC