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Functionalized isobutylene-isoprene copolymer compositions

A composition and copolymer technology, applied in the direction of conjugated diene coatings, surgical adhesives, dressings, etc., can solve problems such as difficult to split uniform, homogeneous coating, incompatibility, and reduce the physical properties of the coating

Inactive Publication Date: 2016-10-12
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, silicones are incompatible with most hydrocarbon elastomers, such as butyl rubber, and tend to phase separate when coated, reducing the physical properties of the coating
Additionally, due to incompatibility, silicones and elastomers tend to phase separate when dissolved in organic solvents, making it difficult to split uniform, homogeneous coatings

Method used

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  • Functionalized isobutylene-isoprene copolymer compositions
  • Functionalized isobutylene-isoprene copolymer compositions
  • Functionalized isobutylene-isoprene copolymer compositions

Examples

Experimental program
Comparison scheme
Effect test

example

[0096] abbreviation:

[0097] ●PDMS – polydimethylsiloxane

[0098] ●BPIB – brominated polyisobutylene (co)polymer

[0099] Table 1: Materials

[0100]

[0101] Reference Example 1: Preparation of Polymer A

[0102] In a three necked round bottom flask equipped with reflux condenser, thermometer and nitrogen inlet were placed 12.2 g of BPIB, 0.61 g of UDA, 0.22 g of TBAB and 48.8 g of toluene. The contents of the flask were stirred with a magnetic stir bar at room temperature under nitrogen atmosphere. After all components were completely dissolved, the flask was heated to 105°C. After 3 hours, the reaction was cooled to room temperature. The solution was poured into acetone to coagulate the modified polymer. The isolated polymer was washed 3 times with fresh acetone to remove residual UDA and TBAB. Polymer A (10-undecylenic acid grafted PIB) was then filtered and dried in a vacuum oven at 50°C for 12 hours.

[0103] Reference Example 2: Preparation of Polymer...

example 1

[0106] In a three necked round bottom flask equipped with reflux condenser, thermometer and nitrogen inlet were placed 5.0 g of polymer A, 2.0 g of PDMS1, 0.05 g of catalyst and 20.0 g of toluene. The contents of the flask were stirred with a magnetic stir bar at 60°C under nitrogen atmosphere. After 6 hours, the reaction was cooled to room temperature and the solution was poured into acetone to condense the PDMS-grafted polymer. The isolated polymer was washed 3 times with fresh acetone to remove unreacted PDMS and catalyst. The PDMS-grafted PIB polymer was then dried in a vacuum oven at 50 °C for 12 h. Based on NMR analysis, the PDMS-grafted PIB polymer contained 3.2 wt% PDMS.

example 2

[0108] The PDMS-grafted PIB polymer was prepared according to the procedure of Example 1, except that the starting materials were 10.0 g of polymer A, 5.0 g of PDMS2, 0.067 g of catalyst and 40 g of toluene, and the reaction of the flask was magnetically A stir bar was stirred at 60 °C under nitrogen for 24 hours. Based on NMR analysis, the PDMS-grafted PIB polymer contained 21.1 wt% PDMS.

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PUM

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Abstract

The present invention describes a siloxane-functional isobutylene copolymer and its use. The copolymer has the formula: wherein a is at least 20, and at least one of b and c is at least one, X is oxygen or nitrogen; R is a covalent bond or a divalent (hetero)hydrocarbyl group; Sil is polydialkylsiloxane; and x is 1 or 2.

Description

Background technique [0001] Isobutylene-isoprene elastomers are used in adhesives, agrochemicals, fiber optic compounds, balloons, caulks and sealants, adhesive films, electrohydraulics, lubricants (2-cycle engine oil), paper and pulp , personal care products, manufacture of pigment concentrates, for the modification of rubber and polymers, as a gasoline / diesel fuel additive for the protection and sealing of certain equipment used in areas where chemical hazards are present. [0002] In many of these applications, high surface friction limits this use. In particular, molded articles such as gaskets, bladders, and seals are difficult to remove from the mold, causing damage to the molded article and contamination of the mold. Many of these molded articles require the use of additives to reduce surface friction. [0003] Often, elastomers can exhibit blocking behavior. The coated surfaces will not feel tacky, but when two of the coated surfaces are in contact with each other, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F279/02C08F299/00C08K5/315C09D153/02A61F13/02A61L24/00A61L26/00C09D151/04C08G81/02
CPCA61L24/06A61L26/0014C09D109/06C09D153/02C08L35/04C08G81/024C08G77/442C08L23/283C08F2810/30C09D123/283C08F8/26C08F8/14C08F8/20C08F210/12C08F8/32C08L83/10C08F299/00C08L23/22C08L23/26C09D151/04C08G2261/726
Inventor 李海承巴布·N·加德丹罗伯特·A·阿斯穆斯史蒂文·D·泰斯
Owner 3M INNOVATIVE PROPERTIES CO
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