RU2515865C1 - Method of obtaining adhesive compositions for sticky polyvinyl chloride tapes, which contains hydroxylated 1,2-polybutadienes - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: glue composition includes perchlorovinyl resin, plasticiser and adhesion-increasing additive. Composition additionally contains hydroxylated 1,2-polybutadiene or hydroxylated syndiotactic 1,2-polybutadiene in quantity from 1 to 15 wt.p.; hydroxylated 1,2-polybutadiene with average weight molecular weight from 8000 to 12000 being applied. Degree of hydroxylation in hydroxylated 1,2-polybutadiene consistitutes from 2 to 27%.

EFFECT: increased adhesion of sticky PVC-tape to metal surface.

3 cl, 11 ex, 1 tbl

Description

The invention relates to the field of production of adhesive compositions used for the manufacture of adhesive sticky polyvinyl chloride (PVC) tapes intended for gluing to various surfaces, and can be used for the manufacture of PVC adhesive tape intended for winding gas and oil pipelines as an insulating and protective coating, and also for repair work.

One of the main requirements for the adhesive for the manufacture of PVC tape is to ensure high adhesion of the resulting adhesive tape to the metal surface.

Known adhesive compositions used for the manufacture of adhesive PVC tapes containing perchlorovinyl resin, pine rosin, solvent and other ingredients [a.s. No. 4223829, cl. C09J 7/00, publ. 04/15/1974; A.S. No. 717118, cl. C09J 7/02, publ. 02/25/1980; RF patent No. 2196794, cl. C09J 127/24, publ. January 20, 2003].

The disadvantage of these adhesive compositions is the lack of adhesion of the obtained adhesive PVC tape to steel.

Closest to the proposed adhesive is adhesive for adhesive tapes [RF patent No. 2244729, class. C09J 127/24, publ. 01/20/2005], containing perchlorovinyl resin, plasticizer, pine rosin and filler in the following ratio of components, parts by weight:

perchlorovinyl resin - 25-30;

dioctyl phthalate - 33-55;

chlorinated α-olefins - 11-33;

pine rosin - 6-8;

activated mixture of natural zeolite and calcium oxide - 0-7.

The disadvantage of this adhesive composition is the insufficient adhesion of the obtained adhesive PVC tape to the surface of the steel, the value of which does not exceed 5-6 N / cm, which does not correspond to modern technical requirements for adhesive tapes for insulation of pipelines.

The technical result of the invention is to increase the adhesion of sticky polyvinyl chloride tapes to steel.

The specified technical result is achieved in that the adhesive composition for sticky PVC tapes containing perchlorovinyl resin, the plasticizer is a mixture of dioctyl phthalate and chlorinated α-olefins, pine rosin additionally contains hydroxylated 1,2-polybutadiene or hydroxylated syndiotactic 1,2-polybutadiene in an amount of 1 to 15 parts by weight Use hydroxylated 1,2-polybutadiene with a weight average molecular weight of from 8,000 to 120,000, the degree of hydroxylation in the hydroxylated 1,2-polybutadiene is 2-27%. The adhesive composition contains components, parts by weight:

perchlorovinyl resin - 25-30;

dioctyl phthalate - 45-55;

chlorinated α-olefins - 10-20;

pine rosin - 4-8;

hydroxylated 1,2-polybutadiene or

hydroxylated syndiotactic 1,2-polybutadiene - 1-15.

As a result of the introduction of hydroxylated 1,2-polybutadiene into the adhesive composition, the adhesion of sticky PVC tapes to the steel surface is substantially increased.

Hydroxylated 1,2-polybutadiene is obtained by oxidation of the intermediate diisobutylaluminium derivatives of 1,2-polybutadiene in toluene at a temperature of 20-50 ° C. The polymer is isolated from the reaction mass and dried.

The adhesive composition is prepared as follows.

45-55 parts by weight are loaded into a reactor heated to 70-75 ° C with stirring. dioctyl phthalate plasticizer, 10-20 parts by weight chlorinated α-olefins and 4-8 parts by weight pine rosin (grade "A" GOST 19113-84). After complete dissolution of the rosin, 25-30 parts by weight are added. perchlorovinyl resin brand PSX-LS and 1-15 parts by weight hydroxylated 1,2-polybutadiene or hydroxylated syndiotactic 1,2-polybutadiene and stirring is continued at a temperature of 70-75 ° C for 4-8 hours until a uniform adhesive composition is obtained.

The glue thus prepared is applied onto a polyvinyl chloride tape by a roller-calender method. The glue is prepared at the place of consumption immediately before application to the PVC tape. Samples for testing according to TU 2245-001-00203312-2003 are prepared from the obtained adhesive PVC tape. The value of adhesion of a PVC tape to steel is determined according to GOST R 51164-98.

The invention is illustrated by the following examples.

Example 1

In a reactor heated to 70-75 ° C, with stirring, load, parts by weight: DOP - 45; chlorinated α-olefins - 20; pine rosin - 6. After dissolving the rosin load 30 parts by weight perchlorovinyl resin and 10 parts by weight hydroxylated 1,2-polybutadiene with a mass-average molecular weight of 105500 and a degree of hydroxylation of 10% and stirred at a temperature of 70-75 ° C for 4-8 hours until a homogeneous adhesive mass is obtained. The glue thus prepared is applied to a polyvinyl chloride tape. The adhesion of the obtained adhesive PVC tape to steel is 11.6 N / cm.

Example 2

In the conditions of example 1, at the next loading of the components, parts by weight: DOP - 55, chlorinated α-olefins - 10, pine rosin - 8, perchlorovinyl resin - 25, hydroxylated 1,2-polybutadiene - 10. Weight average molecular weight of hydroxylated 1, 2-polybutadiene - 54000, the degree of hydroxylation - 18%. The adhesion of the obtained adhesive PVC tape to steel is 11.9 N / cm.

Example 3

In the conditions of example 1, at the next load of the components, parts by weight: DOP - 54, chlorinated α-olefins - 12, pine rosin - 6, perchlorovinyl resin 28, hydroxylated 1,2-polybutadiene - 1. Mass-average molecular weight of hydroxylated 1,2 -polybutadiene - 23000, the degree of hydroxylation - 23%. The adhesion of the obtained adhesive PVC tape to steel is 10.3 N / cm.

Example 4

In the conditions of example 1, at the next loading of the components, parts by weight: DOP - 54, chlorinated α-olefins - 12, pine rosin - 6, perchlorovinyl resin 28, hydroxylated 1,2-polybutadiene - 15. Weight average molecular weight of hydroxylated 1,2 -polybutadiene - 129000, the degree of hydroxylation - 4%. The adhesion of the obtained adhesive PVC tape to steel is 11.7 N / cm.

Example 5

In the conditions of example 1, at the next loading of the components, parts by weight: DOP - 54, chlorinated α-olefins - 12, pine rosin - 6, perchlorovinyl resin 28, hydroxylated 1,2-polybutadiene - 6. Weight average molecular weight of hydroxylated 1,2 -polybutadiene - 11000, the degree of hydroxylation - 6%. The adhesion of the obtained adhesive PVC tape to steel is 12.1 N / cm.

Example 6

In the conditions of example 1, at the next load of the components, parts by weight: DOP - 54, chlorinated α-olefins - 12, pine rosin - 6, perchlorovinyl resin 28, hydroxylated 1,2-polybutadiene - 9. Mass-average molecular weight of hydroxylated 1,2 -polybutadiene - 160500, the degree of hydroxylation - 14%. The adhesion of the obtained adhesive PVC tape to steel is 12.3 N / cm.

Example 7

In the conditions of example 1 at the next load of the components, parts by weight: DOP - 54, chlorinated α-olefins - 12, pine rosin - 6, perchlorovinyl resin 28, hydroxylated syndiotactic 1,2-polybutadiene - 9. Mass-average molecular weight of hydroxylated syndiotactic 1 , 2-polybutadiene - 153500, the degree of hydroxylation - 16%. The adhesion of the obtained adhesive PVC tape to steel is 12.4 N / cm.

Example 8

In the conditions of example 1, at the next loading of the components, parts by weight: DOP - 54, chlorinated α-olefins - 12, pine rosin - 6, perchlorovinyl resin - 28, hydroxylated 1,2-polybutadiene - 13. Mass-average molecular weight of hydroxylated 1, 2-polybutadiene - 12600, the degree of hydroxylation - 4%. The adhesion of the obtained adhesive PVC tape to steel is 11.4 N / cm.

Example 9

In the conditions of example 1, at the next loading of the components, parts by weight: DOP — 54, chlorinated α-olefins — 12, pine rosin — 6, perchlorovinyl resin — 28, hydroxylated 1,2-polybutadiene — 7. Mass-average molecular weight of hydroxylated 1, 2-polybutadiene - 80500, the degree of hydroxylation - 27%. The adhesion of the obtained adhesive PVC tape to steel is 12.6 N / cm.

Example 10

In the conditions of example 1, at the next loading of the components, parts by weight: DOP - 54, chlorinated α-olefins - 12, pine rosin - 6, perchlorovinyl resin 28, hydroxylated 1,2-polybutadiene - 8. Mass-average molecular weight of hydroxylated 1,2 -polybutadiene - 45000, the degree of hydroxylation - 18%. The adhesion of the obtained adhesive PVC tape to steel is 13.3 N / cm.

Example 11 (boundary).

In the conditions of example 1, at the next loading of the components, parts by weight: DOP - 54, chlorinated α-olefins - 12, pine rosin - 6, perchlorovinyl resin 28, hydroxylated 1,2-polybutadiene - 0.5. The mass-average molecular weight of hydroxylated 1,2-polybutadiene is 12,000, the degree of hydroxylation is 27%. The adhesion of the obtained adhesive PVC tape to steel is 3.7 N / cm.

Example 12 (boundary).

In the conditions of example 1, at the next loading of the components, parts by weight: DOP - 54, chlorinated α-olefins - 12, pine rosin - 6, perchlorovinyl resin - 28, hydroxylated 1,2-polybutadiene - 16. Mass-average molecular weight of hydroxylated 1, 2-polybutadiene - 160,000, the degree of hydroxylation - 2%. The adhesion of the obtained adhesive PVC tape to steel is 5.5 N / cm.

Examples 11 and 12 are given as boundary for substantiating the selected intervals for the content of components in the adhesive composition and the characteristics of the hydroxylated 1,2-polybutadiene used in the adhesive composition.

From the data of table 1 it follows that the adhesive compositions obtained using hydroxylated 1,2-polybutadiene or hydroxylated syndiotactic 1,2-polybutadiene, compared with the prototype, provide significantly higher (2-2.3 times) adhesion of sticky PVC- tapes to steel.

Thus, the additional introduction of hydroxylated 1,2-polybutadiene or hydroxylated syndiotactic 1,2-polybutadiene can increase the adhesion of the adhesive PVC tape to steel.

Table 1 The results of experiments to obtain adhesive compositions Name Prototype Example No. one 2 3 four 5 6 7 8 9 10 eleven* 12* Perchlorovinyl resin, parts by weight 25-30 thirty 25 28 28 28 28 28 28 28 28 28 28 Dioctyl phthalate, parts by weight 33-55 45 55 54 54 54 54 54 54 54 54 54 54 Chlorinated α-olefins, parts by weight 11-33 twenty 10 12 12 12 12 12 12 12 12 12 12 Pine rosin, parts by weight 6-8 6 8 6 6 6 6 6 6 6 6 6 6 Hydroxylated 1,2-polybutadiene, parts by weight - 10 10 one fifteen 6 9 - 13 7 8 0.5 16 Hydroxylated syndiotactic 1,2-polybutadiene, parts by weight - - - - - - - 9 - - - - - Mass-average molecular weight of hydroxylated 1,2-polybutadiene - 105500 54,000 23000 129,000 11000 160500 153500 12600 80500 45000 12000 160,000 The degree of hydroxylation in hydroxylated 1,2-polybutadiene,% wt. - 10 eighteen 23 four 6 fourteen 16 four 27 eighteen 27 2 Adhesion of adhesive PVC tape to steel, N / cm 5-6 11.6 11.9 10.3 11.7 12.1 12.3 12,4 11,4 12.6 13.3 3,7 5.5 * Examples 11 and 12 are given as boundary for substantiating the selected intervals of the content of components in the adhesive composition and the characteristics of the hydroxylated 1,2-polybutadiene used in the adhesive composition.

Claims (3)

1. An adhesive composition for sticky PVC tapes containing a plasticizer, perchlorovinyl resin, pine rosin, characterized in that it additionally contains hydroxylated 1,2-polybutadiene in the following ratio of mass parts:
perchlorovinyl resin - 25-30 dioctyl phthalate - 45-55 chlorinated α-olefins - 10-20 pine rosin 6-8 hydroxylated 1,2-polybutadiene - 1-15. 2. The adhesive composition according to claim 1, characterized in that the use of hydroxylated 1,2-polybutadiene with a degree of hydroxylation from 2 to 27% with a weight average molecular weight of from 8000 to 120,000. 3. The adhesive composition according to claim 1, characterized in that instead of hydroxylated 1,2-polybutadiene, hydroxylated syndiotactic 1,2-polybutadiene can be used.