SU979442A1 - Polymeric composition - Google Patents

Description

The invention relates to the preparation of polymer compositions based on isoprene block copolymer with styrene and can be used in the manufacture of polymer products that are resistant to the action of light.

A known composition based on carbocepine polymers containing 2,2,6,6-tetramethylpiperidylene-4-acetic acid fl. As a stabilizing additive.

However, said composition is characterized; insufficient light fastness, and the synthesis of stabilizing additives is not technological, since it involves many stages and is associated with the use of inaccessible reagents.

Closest to the proposed technical essence and the effect obtained is a polymer KQM position based on carbodepous polymers f including a block copolymer of isoprene with styrene, containing as a stabilizing additive. 2,2,6,6-tetramethylpiperidyl-4-acetic acid derivatives f2.

This composition is also characterized by insufficient lightfastness, and the synthesis of the stabilization of their additives is not technological.

The purpose of the invention is to increase the light resistance.

This goal is achieved in that a polymer composition comprising an isoprene block copolymer with styrene. and a stabilizing additive, a derivative of tetramethylpiperidinecarboxylic acid, contains as a stabilizing additive a compound of the total

10 formulas

ABOUT

NLg15

.CHjCHaR

Hjcvj

20

Oh or

where X Y N or 6}

 or CN

R COOCH,

with the following ratio of components, weight, hours:

Isoprene block copolymer

with styrene 100

A stabilizing additive, 30 indicated greater than 0.2-1. The synthesis of the proposed stabilizing additives is simple and includes easily available reagents. To synthesize these compounds, triacetonamine or 2,2,6, -tetramethyl-4-oxopiperidin-1-oxyl is treated with a secondary cyclic amine, and the reaction product is alkylated with acrylic esters or acrylonitrile. Example: 1.5 g of isoprene block copolymer with styrene (grade EAST-30) and 15 mg (1 part by weight), compound 1 table are dissolved in 10 ml of chloroform. The solution is mixed and coated with a tensioned cellophane film. After evaporation of the solvent and peeling of the substrate with water, a film 2 mm thick is produced. The resulting film is irradiated with light of a DRM-120 mercury lamp with a wavelength in excess of AOO nm. As a lightfastness characteristic, the value of the induction period for the formation of hydroxyl groups absorbing in the regions of 3450 nm is used. EXAMPLE 2 Analogously to Example 1, films of a block copolymer containing 1 weight.h. as stabilizer are prepared and tested. Connect n 2 (table). EXAMPLE 3 Analogously to Example 1, a block copolymer film containing 1 weight.h, compound 3 (table) as a stabilizer is prepared and tested.

Light stabilizer

Compound

Ethyl ester (2,2,6,6-tetramethyl-4-Y-morpholino-1, 2,5,6-tetrahydropiperidyl-5) -3-propionic acid

Ethyl ester (2,2,6,6-tetramethyl-4-M-piperidino-1, 2,5,6-tetrahydropiperidyl-5) -3-propivnova acid

Methyl ester of (2, 2,6, 6-tetramethyl-4-N-morpholino-l, 2,5,6-tetrahydropiperidyl-5) -3-propionic acid A

Ethyl ester of (2,2,6,6-tetramethyl-1-oxyl-4-N-morpholino-1, 2.5., 6-tetrahydropiperidyl-5) -3-propionic acid

Nitrile (2,2,6,6-tetraietil-4-Y-morpholino-1, 2,5,6-tetrahydropiperidyl-5) -3-propionic acid

Nitrile (2,2,6,6-tetramethyl-1-oxyl-4-A-morpholino-1, 2,5,6-tvtrahydropiperidyl-5) -3-propionic acid

Ethyl ester 2,2,6,6-tetramethylpiperidyl-4-acetic acid (prototype)

2- (2-Oxy-5-methylphenyl) benzotriazole Without additive

Induction period, h

49

45

44 80 28

57

Claims (2)

24 6 3 PRI me R 4. Similarly to example 1, films of a block copolymer are prepared and tested, containing 1 weight parts of a stabilizer as stabilizer. compounds 4 (table). EXAMPLE 5 Analogously to Example 1, a block copolymer film containing 0.2 parts by weight is prepared and tested. connection 4. The induction period of 20 hours. Example. Analogously to Example 1, a film of a block copolymer containing as a stabilizer 0.5 weight.h is prepared and tested. Compounds 4. Induction period 47 hours. EXAMPLE 7 Anshop method of Example 1 is prepared with a block copolymer film containing 1 weight.h. Compound 5 (table). Example Analogously to Example 1, a film block copolymer containing 1 weight parts is prepared and tested. Compound 6 (table). Examples 9 and 10. Analogously to Example 1, a film of a copolymer that does not contain a stabilizer and also contains 1 weight by weight is prepared and tested. Benazole P or ethyl 2,2,6,6-tetramethylpiperidyl-4-acetic acid. The induction periods of the "oxidation" of the block copolymer IST-30 in the presence of 1 weight ... h of the light stabilizer are listed in the table. From the presented data it follows that the proposed lightfastness composition is up to 3.5 times greater than the composition of the prototype. In addition, since the proposed composition includes easily "synthesized light stabilizing additives, it can be implemented in the industrial ... Formula of the Invention the fact that, in order to increase the lightness of the composition, it contains as a stabilizing additive a compound of the general formula where the right is straight (n / C1TCM s, e X is CHj or o; U n 6; R is coaxial, coaxial; H5 and li CN, and the following ratio is scattered, weight 4. Block copolymer of isoprene with styrene100 Stabilizing additive, above 0.2-1-1 Sources of information taken into account in examination 1.Patent of Great Britain 1398411, C. C 2 C, published 1973. 2. The patent of Great Britain 1398414, cl. C 2 C, pub. 1973 .: rototype).