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

Bottom sizing agent for addition type liquid silicone rubber and preparation method of bottom sizing agent

A liquid silicone rubber, primer technology, applied in the direction of adhesives, adhesive additives, non-polymer adhesive additives, etc., can solve the problems of poor adhesion, can not meet the effective adhesion of silicone rubber, etc. Effect

Inactive Publication Date: 2017-06-13
南京万儒科技实业有限公司
View PDF2 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the technical problem that the universal primer cannot satisfy the effective bonding of silicone rubber on the substrate, the present invention aims to provide a primer for addition-type liquid silicone rubber with strong adhesion and a preparation method thereof. The primer of the present invention can strengthen the adhesion between the addition-type liquid silicone rubber and substrates such as PC, ABS, PC / ABS, etc., and improve the occurrence of air bubbles and poor adhesion during the bonding process.

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
  • Bottom sizing agent for addition type liquid silicone rubber and preparation method of bottom sizing agent
  • Bottom sizing agent for addition type liquid silicone rubber and preparation method of bottom sizing agent
  • Bottom sizing agent for addition type liquid silicone rubber and preparation method of bottom sizing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0026] Example 1-5: Preparation of a primer for addition-type liquid silicone rubber.

[0027] Table 1. Composition and dosage of primer for addition-type liquid silicone rubber

[0028]

[0029] Prepare primer according to formula and consumption in table 1, concrete operation process is as follows:

[0030] 1) Preparation of raw materials:

[0031] Weigh silicone-modified polyurethane, siloxane containing active groups, silicone resin, silane coupling agent, rare metal catalyst and petroleum ether, and divide the petroleum ether into two equally;

[0032] 2) Preparation of component A:

[0033] Under the condition of mechanical stirring, add silicone-modified polyurethane to one part of petroleum ether and stir evenly, then add siloxane containing active groups and stir evenly to obtain component A;

[0034] 2) Preparation of component B:

[0035] Under the condition of mechanical stirring, add the silicone resin to another part of petroleum ether and stir evenly, the...

experiment example

[0038] Experimental example: performance test of primer for addition-type liquid silicone rubber.

[0039] After diluting the primer prepared in Examples 1-5 to a spray viscosity of 7.5 to 8.5S, spray them on PC / ABS substrates respectively, and perform injection molding of addition-type silicone rubber on them after baking. No air bubbles were observed in the silicone rubber during this process.

[0040] After the injection molding is completed, cool the sample and measure the tensile strength (the maximum tensile stress of the sample stretched to the fracture process), the elongation at break (the elongation of the sample when it is broken), the tear strength ( Divide the force required to tear the sample by the thickness of the sample) and 90° peel strength (the sample is prepared by bonding a strip of rubber to a hard plate, and peeled at a peeling angle of 90° to measure the peeling of the rubber and the hard plate The required force, the maximum peeling force that the sa...

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

No PUM Login to View More

Abstract

The invention belongs to the technical field of bottom sizing agents and relates to a bottom sizing agent for addition type liquid silicone rubber and a preparation method of the bottom sizing agent. The bottom sizing agent for addition type liquid silicone rubber is prepared from the following components in percentage by weight: 10-45% of organosilicon modified polyurethane, 5-20% of siloxane containing active groups, 10-30% of a silicon resin, 0.5-15% of a silane coupling agent, 0.005-5% of a rare metal catalyst and 30-70% of petroleum ethers. By utilizing the bottom sizing agent disclosed by the invention, the cohesiveness between the addition type liquid silicone rubber and base materials such as PC, ABS and PC / ABS can be enhanced, and the conditions such as bubbles and poor adhesion in the adhering process are improved. In addition, a certain adhesive force can be still kept under the condition that the silicone rubber is broken.

Description

technical field [0001] The invention belongs to the technical field of primers, and relates to a primer for silicone rubber (especially addition-type liquid silicone rubber) and a preparation method thereof. Background technique [0002] Addition-type liquid silicone rubber is a kind of silicone rubber developed in the late 1970s. It is based on vinyl-containing polysiloxane and uses silicon-hydrogen bond-containing oligosiloxane as a vulcanizing crosslinking agent. Under the action of a platinum catalyst, an elastomer with a network structure is formed through an addition reaction. In addition to the excellent properties of ordinary silicone rubber, addition-type liquid silicone rubber also has the advantages of fast and convenient molding, and can be made into serialized and differentiated products of different shapes and purposes, and can be used as packaging for electronic components and electrical equipment Or potting materials, medical materials, dental impression mat...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/04C09J175/04C09J11/06
CPCC09J183/04C09J11/06C09J175/04C08L75/04C08K5/5419C08L83/04C08K5/5403
Inventor 陈三尧
Owner 南京万儒科技实业有限公司